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A5E46373908

Function Manual

Advanced Motor Protection for Variable Speed Operation

Manual

AAA5E46373908A

Security Information 1

Safety notes 2

Introduction 3Advanced Motor Protection Parameters 4

RTD Terminal Connections 5Advanced Motor Protection and RTD Protection Functions

6

Alarms, Faults, and Logging Messages 7NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens

8

Troubleshooting 9

Spare Parts Data 10

Appendix A

Service and support 11

ESD guidelines A

Legal informationWarning notice system

This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger.

DANGERindicates that death or severe personal injury will result if proper precautions are not taken.

WARNINGindicates that death or severe personal injury may result if proper precautions are not taken.

CAUTIONindicates that minor personal injury can result if proper precautions are not taken.

NOTICEindicates that property damage can result if proper precautions are not taken.If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage.

Qualified PersonnelThe product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems.

Proper use of Siemens productsNote the following:

WARNINGSiemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. The permissible ambient conditions must be complied with. The information in the relevant documentation must be observed.

TrademarksAll names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.

Disclaimer of LiabilityWe have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions.

Siemens AGGlobal Services Information Technology80200 MÜNCHENGERMANY

A5E46373908AⓅ 06/2019 Subject to change

Copyright © Siemens AG 2019.All rights reserved

Table of contents

1 Security Information......................................................................................................................................9

1.1 Security information .................................................................................................................9

2 Safety notes................................................................................................................................................11

2.1 General Safety Information ....................................................................................................11

2.2 Observing the Five Safety Rules............................................................................................12

2.3 Safety Information and Warnings...........................................................................................13

3 Introduction.................................................................................................................................................15

3.1 Background ...........................................................................................................................15

4 Advanced Motor Protection Parameters.....................................................................................................17

4.1 Standard Protections Block Diagram .....................................................................................17

4.2 Introduction ............................................................................................................................23

4.3 Protection Function Enable Types .........................................................................................26

5 RTD Terminal Connections ........................................................................................................................27

5.1 Installation External Wiring.....................................................................................................27

6 Advanced Motor Protection and RTD Protection Functions .......................................................................29

6.1 Top Level Menu and Submenus ............................................................................................29

6.2 Device 12 - Fixed Pickup Overspeed.....................................................................................31

6.3 Device 12 - Variable Pickup Overspeed ................................................................................33

6.4 Device 14 - Fixed Pickup Underspeed...................................................................................37

6.5 Device 14 - Variable Pickup Underspeed ..............................................................................39

6.6 Device 37 - Fixed Pickup Undercurrent .................................................................................43

6.7 Device 37 - Variable Pickup Undercurrent .............................................................................45

6.8 Device 37P - Fixed Underpower Relay .................................................................................48

6.9 Device 38 - Fixed Bearing Temperature Protective Device ...................................................50

6.10 Device 39 - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation.........................51

6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay ......................................................................................................................................54

6.12 Device 48 - Incomplete Sequence Relay Device - Maximum Start Time...............................56

6.13 Device 48 - Incomplete Sequence Relay Device - Maximum Stop Time...............................57

6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload........................58

6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload ...................63

Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 3

6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection........................70

6.17 Device 50 - Fixed Pickup Instantaneous Overcurrent Device ...............................................80

6.18 Device 51 - Fixed Inverse Time Overcurrent .........................................................................826.18.1 Device 51 - Fixed Inverse Time Overcurrent .........................................................................826.18.2 Function 51 IEEE Pickup and Reset .....................................................................................866.18.3 Function 51 ANSI Pickup and Reset .....................................................................................936.18.4 Function 51 IAC Pickup and Reset .....................................................................................1026.18.5 Function 51 IEC Pickup and Reset ......................................................................................1116.18.6 Function 51 I2T Pickup and Reset ......................................................................................1196.18.7 Function 51 I4T Pickup and Reset ......................................................................................121

6.19 Device 55 - Fixed Pickup Maximum Power Factor ..............................................................124

6.20 Device 55 - Power Factor Relay Device (Fixed minimum power factor)..............................126

6.21 Device 59G - Fixed Pickup Instantaneous Zero Sequence Overvoltage .............................128

6.22 Device 59G - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage...............130

6.23 Device 66 - Notching or Jogging Device - Starts per Hour ..................................................133

6.24 Device 66 - Notching or Jogging Device - Cold Starts per Hour ..........................................134

6.25 Device 66 - Notching or Jogging Device - Hot Starts per Hour............................................135

6.26 Device 66 - Notching or Jogging Device - Maximum Thermal Capacity Used to Start ........136

6.27 Device 81 - Fixed Pickup Overfrequency.............................................................................137

6.28 Device 81 - Variable Pickup Overfrequency ........................................................................139

6.29 Device 81 - Fixed Pickup Underfrequency...........................................................................143

6.30 Device 81 - Variable Pickup Underfrequency ......................................................................145

6.31 Device 81 - Fixed Pickup High Frequency Rate of Change.................................................149

6.32 Changing RTD Type ............................................................................................................1516.32.1 Changing RTD Type ............................................................................................................151

7 Alarms, Faults, and Logging Messages ...................................................................................................153

7.1 Alarms, Faults, and Logging Messages ...............................................................................153

8 NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens........................................159

8.1 Viewing Protection Variables ...............................................................................................1598.1.1 AMP Data Screen ................................................................................................................1608.1.2 AMP Alarms / Faults ............................................................................................................1618.1.3 RTD Status Screen ..............................................................................................................164

9 Troubleshooting........................................................................................................................................165

9.1 Troubleshooting ...................................................................................................................165

10 Spare Parts Data .....................................................................................................................................167

10.1 AMP Replaceable Spart Parts List.......................................................................................167

A Appendix...................................................................................................................................................169

A.1 IEEE Device Numbers and Functions..................................................................................169

Table of contents

Advanced Motor Protection for Variable Speed Operation4 Manual, AA, A5E46373908A

A.2 Abbreviations .......................................................................................................................171

11 Service and support..................................................................................................................................173

11.1 Field Service Operation........................................................................................................173

A ESD guidelines .........................................................................................................................................175

A.1 ESD-sensitive Components .................................................................................................175

Index.........................................................................................................................................................179

Tables

Table 4-1 Pickup Level Settings for Variable Undercurrent Protection Example ........................................20Table 4-2 Example of per-unit and engineering unit quantities ...................................................................25Table 6-1 Advanced Motor Protection Menu - Fixed Pickup Over Speed (ID 7181) ...................................31Table 6-2 Advanced Motor Protection Menu - Variable Pickup Over Speed (ID 7189)...............................33Table 6-3 Advanced Motor Protection Menu - Fixed Pickup Underspeed Device (ID 7217).......................37Table 6-4 Advanced Motor Protection Menu - Variable Pickup Underspeed (ID 7226) ..............................39Table 6-5 Advanced Motor Protection Menu - Fixed Pickup Undercurrent Device (ID 7256) .....................43Table 6-6 Advanced Motor Protection Menu - Variable Pickup Undercurrent Device (ID 7266).................45Table 6-7 Advanced Motor Protection Menu - Fixed Pickup Underpower Relay (ID 7297) ........................48Table 6-8 Advanced Motor Protection Menu - Mechanical Condition Monitor - Fixed Pickup Torque

Pulsation (ID 7306)......................................................................................................................51Table 6-9 Advanced Motor Protection Menu - Phase Balance Current - Fixed Negative Sequence

Over Current (ID 7316)................................................................................................................54Table 6-10 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Start Time (ID 7325)......56Table 6-11 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Stop Time (ID 7330)......57Table 6-12 Advanced Motor Protection Menu - Machine Thermal Model - Fixed Parameter Thermal

Overload (ID 7335)......................................................................................................................58Table 6-13 Advanced Motor Protection Menu - Machine Thermal Model - Variable Thermal Overload

(ID 7352) .....................................................................................................................................63Table 6-14 Values of the k-Factor Settings ...................................................................................................69Table 6-15 RTD Protection Menu - Machine Thermal Overload - Fixed Pickup RTD Protection (ID 7429)......70Table 6-16 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent (ID 7515) ...........80Table 6-17 Advanced Motor Protection Menu - Fixed Pickup Inverse Time Overcurrent (ID 7533) .............82Table 6-18 IEEE Curve Data Table ...............................................................................................................87Table 6-19 ANSI Curve Data Table...............................................................................................................94Table 6-20 IAC Curve Data Table ...............................................................................................................103Table 6-21 Advanced Motor Protection Menu - Fixed Pickup Maximum Power Factor (ID 7573) ..............124Table 6-22 Advanced Motor Protection Menu - Fixed Pickup Minimum Power Factor (ID 7582) ...............126Table 6-23 Advanced Motor Protection Menu - Fixed PickupInstantaneous Zero Sequence

Overvoltage (ID 7563) ...............................................................................................................128Table 6-24 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent (ID 7524) .........130

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Table 6-25 Advanced Motor Protection Menu - Starts per Hour (ID 7590) ................................................133Table 6-26 Advanced Motor Protection Menu - Notching or Jogging - Cold Starts per Hour (ID 7593).....134Table 6-27 Advanced Motor Protection Menu - Hot Starts per Hour (ID 7598)..........................................135Table 6-28 Motor Protection Menu - Maximum Thermal Capacity Used to Start (ID 7603) .......................136Table 6-29 Advanced Motor Protection Menu - Fixed Pickup Overfrequency (ID 7606).............................137Table 6-30 Advanced Motor Protection Menu - Variable Pickup Overfrequency (ID 7615) ........................139Table 6-31 Advanced Motor Protection Menu - Fixed Pickup Underfrequency (ID 7645)...........................143Table 6-32 Advanced Motor Protection Menu - Variable Pickup Underfrequency (ID 7654) .....................145Table 6-33 Advanced Motor Protection Menu - Fixed Pickup High Frequency Rate of Change (ID 7684)....149Table 7-1 Advanced Motor Protection Function Event Log Table .............................................................153Table 7-2 RTD Protection Function Event Log Table................................................................................156

Figures

Figure 4-1 Generalized Protection Function Block Diagram.........................................................................17Figure 4-2 Various Pickup and Dropout Time Delay Counter Examples of Operation .................................19Figure 4-3 Variable Pickup Under Current Graph.........................................................................................21Figure 4-4 AMP Hardware Block Diagram....................................................................................................24Figure 5-1 RTD Termination Diagram (for internal and external wiring).......................................................27Figure 5-2 Internal and External Wiring for Unused RTD Inputs ..................................................................28Figure 6-1 Overspeed Protection Diagram...................................................................................................32Figure 6-2 Overspeed Protection Diagram...................................................................................................36Figure 6-3 Underspeed Protection Diagram.................................................................................................38Figure 6-4 Underspeed Protection Diagram.................................................................................................42Figure 6-5 UnderCurrent Protection .............................................................................................................44Figure 6-6 Undercurrent Protection Diagram................................................................................................47Figure 6-7 Underpower Protection Diagram.................................................................................................49Figure 6-8 Per Unit Torque...........................................................................................................................52Figure 6-9 Mean of Torque Dataset .............................................................................................................52Figure 6-10 RMS Value of Pulsating Torque..................................................................................................52Figure 6-11 Torque Pulsation Diagram...........................................................................................................53Figure 6-12 Negative Sequence Current Diagram .........................................................................................55Figure 6-13 Thermal Capacity used as determined by Stator Temperature...................................................61Figure 6-14 Example of Variable Parameter Thermal Overload Protection k-Factor ....................................69Figure 6-15 Overcurrent Protection Diagram..................................................................................................81Figure 6-16 User Programmed OverCurrent Trip Curve Example .................................................................85Figure 6-17 IEEE Pickup Curve Equation.......................................................................................................87Figure 6-18 IEEE Reset Curve Equation ........................................................................................................87Figure 6-19 IEEE Extremely Inverse Pickup Time..........................................................................................88

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Figure 6-20 IEEE Extremely Inverse Reset Time...........................................................................................89Figure 6-21 IEEE Very Inverse Pickup Time ..................................................................................................90Figure 6-22 IEEE Very Inverse Reset Time....................................................................................................91Figure 6-23 IEEE Moderately Inverse Pickup Time........................................................................................92Figure 6-24 IEEE Moderately Inverse Reset Time .........................................................................................93Figure 6-25 ANSI Pickup Curve Equation ......................................................................................................94Figure 6-26 ANSI Reset Curve Equation........................................................................................................94Figure 6-27 ANSI Extremely Inverse Pickup Time .........................................................................................95Figure 6-28 ANSI Extremely Inverse Reset Time...........................................................................................96Figure 6-29 ANSI Very Inverse Pickup Time..................................................................................................97Figure 6-30 ANSI Very Inverse Reset Time ...................................................................................................98Figure 6-31 ANSI Inverse Pickup Time ..........................................................................................................99Figure 6-32 ANSI Inverse Reset Time..........................................................................................................100Figure 6-33 ANSI Moderately Inverse Pickup Time......................................................................................101Figure 6-34 ANSI Moderately Inverse Reset Time.......................................................................................102Figure 6-35 IAC pickup-curve equation ........................................................................................................103Figure 6-36 IAC Reset Curve Equation ........................................................................................................103Figure 6-37 IAC Extremely Inverse Pickup Time..........................................................................................104Figure 6-38 IAC Extremely Inverse Reset Time ...........................................................................................105Figure 6-39 IAC Very Inverse Pickup Time ..................................................................................................106Figure 6-40 IAC Very Inverse Reset Time....................................................................................................107Figure 6-41 IAC Inverse Pickup Time...........................................................................................................108Figure 6-42 IAC Inverse Reset Time ............................................................................................................109Figure 6-43 IAC Short Inverse Pickup Time .................................................................................................110Figure 6-44 IAC Short Inverse Reset Time...................................................................................................111Figure 6-45 IEC Pickup Curve Equation.......................................................................................................111Figure 6-46 IEC Reset Curve Equation ........................................................................................................111Figure 6-47 IEC Inverse Pickup Time...........................................................................................................112Figure 6-48 IEC Inverse Reset Time ............................................................................................................113Figure 6-49 IEC Extremely Inverse Pickup Time..........................................................................................114Figure 6-50 IEC Extremely Inverse Reset Time ...........................................................................................115Figure 6-51 IEC Short Inverse Pickup Time .................................................................................................116Figure 6-52 IEC Short Inverse Reset Time...................................................................................................117Figure 6-53 IEC Very Inverse Pickup Time ..................................................................................................118Figure 6-54 IEC Very Inverse Reset Time....................................................................................................119Figure 6-55 I2t Pickup Time Equation ..........................................................................................................119Figure 6-56 I2t Reset Time Equation............................................................................................................120Figure 6-57 I2t Inverse Pickup Time.............................................................................................................120Figure 6-58 I2t Inverse Reset Time ..............................................................................................................121

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Figure 6-59 I4t Pickup Time equation...........................................................................................................121Figure 6-60 I4t Reset Time equation ............................................................................................................122Figure 6-61 I4t Inverse Pickup......................................................................................................................122Figure 6-62 I4t Inverse Reset .......................................................................................................................123Figure 6-63 OverPF Protection Diagram ......................................................................................................125Figure 6-64 UnderPF Protection Diagram ....................................................................................................127Figure 6-65 OverZeroSeqVoltage Protection Diagram.................................................................................129Figure 6-66 OverZeroSeqVoltage Protection Diagram.................................................................................131Figure 6-67 OverFrequency Protection Diagram..........................................................................................138Figure 6-68 Overfrequency Protection Diagram...........................................................................................142Figure 6-69 UnderFrequency Protection Diagram........................................................................................144Figure 6-70 Underfrequency Protection Diagram.........................................................................................148Figure 6-71 OverFrequencyRate Protection.................................................................................................150Figure 8-1 Display Parameters ...................................................................................................................159Figure 8-2 AMP Data Screen......................................................................................................................161Figure 8-3 AMP Alarms / Faults Screen .....................................................................................................162Figure 8-4 Output Data IDs ........................................................................................................................163Figure 8-5 RTD Status Screen ...................................................................................................................164Figure A-1 ESD Protective Measures .........................................................................................................177

Table of contents


Security Information 11.1 Security information

Siemens provides products and solutions with industrial security functions that support the secure operation of plants, systems, machines and networks.

In order to protect plants, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial security concept. Siemens’ products and solutions constitute one element of such a concept.

Customers are responsible for preventing unauthorized access to their plants, systems, machines and networks. Such systems, machines and components should only be connected to an enterprise network or the internet if and to the extent such a connection is necessary and only when appropriate security measures (e.g. firewalls and/or network segmentation) are in place.

For additional information on industrial security measures that may be implemented, please visit https://www.siemens.com/industrialsecurity.

Siemens’ products and solutions undergo continuous development to make them more secure. Siemens strongly recommends that product updates are applied as soon as they are available and that the latest product versions are used. Use of product versions that are no longer supported, and failure to apply the latest updates may increase customer’s exposure to cyber threats.

To stay informed about product updates, subscribe to the Siemens Industrial Security RSS Feed under https://www.siemens.com/industrialsecurity.


Security Information1.1 Security information


Safety notes 22.1 General Safety Information

Proper Use SINAMICS Perfect Harmony™ GH180 medium voltage drives must always be installed in closed electrical operating areas. The drive is connected to the industrial network via a circuit-breaker or contactor that is electrically connected to the VFD control to enable the drive protection features.

The specific transport conditions must be observed when the equipment is transported. The equipment shall be assembled/installed and the separate cabinet units connected properly by cable and/or busbar in accordance with the assembly/installation instructions. The relevant instructions regarding correct storage, EMC-compliant installation, cabling, shielding and grounding and an adequate auxiliary power supply must be strictly observed. Fault-free operation is also dependent on careful operation and maintenance.

The power sections are designed for variable-speed drives use with synchronous and asynchronous motors. Operating modes, overload conditions, load cycles, and ambient conditions different to those described in this document are allowed only by special arrangement with the manufacturer.

Commissioning should only be carried out by trained service personnel in accordance with the commissioning instructions.

System components such as circuit-breaker, transformer, cables, cooling unit, motor, speed sensors, etc., must be matched to VFD operation. System configuration may only be carried out by an experienced system integrator.


2.2 Observing the Five Safety RulesThere are five safety rules that must always be observed to assure not only personal safety, but to prevent material damage as well. Always obey safety-related labels located on the product itself and always read and understand each safety precaution prior to operating or working on the drive.

The five safety rules:

1. Disconnect the power applied to the system.

2. Protect against reapplication of power.

3. Make sure that the equipment is de-energized.

4. Apply grounding (earthing) means.

5. Cover or enclose adjacent components to secure all forms of hazardous energy.

DANGER

Danger Due to High Voltages

High voltages cause death or serious injury if the safety instructions are not observed or if the equipment is handled incorrectly.

Potentially fatal voltages occur when this equipment is in operation which can remain present even after the VFD is switched off.

Ensure that only qualified and trained personnel carry out work on the equipment.

Follow the five safety rules during each stage of the work.

Safety notes2.2 Observing the Five Safety Rules


2.3 Safety Information and Warnings

DANGER

Hazardous Voltage! ● Always follow the proper lock-out/tag-out procedures before beginning any maintenance

or troubleshooting work on the VFD. ● Always follow standard safety precautions and local codes during installation of external

wiring. The installation must follow wiring practices and insulation systems as specified in IEC 61800-5-1.

● Hazardous voltages may still exist within the VFD cabinets even when the disconnect switch is open (off) and the supply power is shut off.

● Only qualified individuals should install, operate, troubleshoot, and maintain this VFD. A qualified individual is "a person, who is familiar with the construction and operation of the equipment and the hazards involved."

● Always work with one hand, wear electrical safety gloves, wear insulated electrical hazard rated safety shoes, and safety goggles. Also, always work with another person present.

● Always use extreme caution when handling or measuring components that are inside the enclosure. Be careful to prevent meter leads from shorting together or from touching other terminals.

● Use only instrumentation (e.g., meters, oscilloscopes, etc.) intended for high voltage measurements (that is, isolation is provided inside the instrument, not provided by isolating the chassis ground of the instrument).

● Never assume that switching off the input disconnector will remove all voltage from internal components. Voltage is still present on the terminals of the input disconnector. Also, there may be voltages present that are applied from other external sources.

● Never touch anything within the VFD cabinets until verifying that it is neither thermally hot nor electrically alive.

● Never remove safety shields (marked with a HIGH VOLTAGE sign) or attempt to measure points beneath the shields.

● Never operate the VFD with cabinet doors open. The only exception is the control cabinet.● Never connect any grounded (i.e., non-isolated) meters or oscilloscopes to the system.● Never connect or disconnect any meters, wiring, or printed circuit boards while the VFD is

energized.● Never defeat the instrument’s grounding.● When a system is configured with VFD bypass switchgear (e.g. contactors between line

and motor, and VFD and motor), these switches should be interlocked so that the line voltage is never applied to the VFD output if the medium voltage input is removed from the VFD.

● When a system is configured with VFD pre-charge, medium voltage is present on the primary side of the input transformer and upstream device even though the MV contactor is not closed.

Safety notes2.3 Safety Information and Warnings


WARNING

Potential Arc Hazard● Arcing can result in damage to property, serious injury and even death. ● The equipment has not been tested and rated for arc flash protection.● Avoiding arc hazard risks is dependent upon proper installation and maintenance.● Incorrectly applied equipment, incorrectly selected, connected or unconnected cables, or

the presence of foreign materials can cause arcing in the equipment.● Follow all applicable precautionary rules and guidelines as used in working with medium

voltage equipment.● The equipment may be used only:

– for the applications defined as suitable in the technical description.– in combination with equipment and components supplied by other manufacturers which

have been approved and recommended by Siemens.● Always follow the facility / installation site rules / guidelines for Personal Protectiive

Equipment (PPE) based on the Arc Flash study of that facility.

Additional safety precautions and warnings appear throughout this manual. These important messages should be followed to reduce the risk of personal injury or equipment damage.

WARNING

Obey Rules to Avoid Risk of Death● Always comply with local codes and requirements if disposal of failed components is

necessary.● Always ensure the use of an even and flat truck bed to transport the VFD system. Before

unloading, be sure that the concrete pad is level for storage and permanent positioning.● Always confirm proper tonnage ratings of cranes, cables, and hooks when lifting the VFD

system. Dropping the cabinet or lowering it too quickly could damage the unit.● Never disconnect control power while medium voltage is energized. This could cause

severe system overheating and/or damage.● Never store flammable material in, on, or near the drive enclosure. This includes

equipment drawings and manuals.● Never use fork trucks to lift cabinets that are not equipped with lifting tubes. Be sure that

the fork truck tines fit the lifting tubes properly and are the appropriate length.

Safety notes2.3 Safety Information and Warnings


Introduction 33.1 Background

Unlike other motor protection management relays, the SINAMICS Advanced Motor Protection (AMP) is fully integrated into the drive itself, requiring no installation or mounting. Protection variables and RTD data used by the AMP are tested to ensure that the AMP is functioning properly and is ready for parameter setting before leaving the factory. To assure motor and process protection, it is necessary to define protection settings in such a way as to prevent motor and process damage, which can occur in various manners and conditions.

Today industrial equipment is designed to be operated for 20 years or longer. Medium voltage motors are exposed to environmental and mechanical stresses that, over time, could lead to motor degradation and malfunction. The monitoring and protection of such medium voltage motors is an essential element in the overall industrial process protection. These protection schemes are needed to avoid financial losses caused by unexpected process downtown.

Medium voltage motors are operated either directly on line (DOL) or through variable frequency drives (VFDs). Thus, they require protection from the following conditions:

● input line events

● high temperatures, insulation and bearing failures

● conditions created by a change in a load

– overload

– underload

– imbalance

– jamming

The advanced motor protection algorithms described in this manual can be used to protect systems from such events. In addition, some features can also be configured to detect and protect against undesirable process conditions.

The following chapters provide an overview of the function itself, followed by the function as implemented in the GH180 drive.


Introduction3.1 Background


Advanced Motor Protection Parameters 44.1 Standard Protections Block Diagram

Time Protections Standard Block DiagramA standard block diagram is used for many definite time protections. The Motor Protection Relay function design for various time protections is shown in the figure Generalized Protection Function Block Diagram.

Low Pass

FilterProtec!on Variable

(Voltage, Current,

etc.)

Pickup

Level

>

<Σ

+

-

1=pickup

0=dropout

Enable (1)

Disable (0)

Time

Constant

Pickup

Time Delay

(Counter)

Dropout

Time Delay

(Counter)

Count

Enable

Zero

>=

>=

Output

Output

Pickup

Time Delay

Dropout

Time Delay

Count

Enable

Trip or Alarm

Output

Reset

Reset

Over/

Under

Select

Low Pass

Filter

Time

Constant

Reset

1-(Dropout

Level)

Latch Control

1 = latched

Zero

Pickup

Timed

Out

Dropout

Timed

Out

Figure 4-1 Generalized Protection Function Block Diagram

Note

Refer to the appendix of this manual and IEEE C37.2 to obtain further information about device numbers and functions.


The functions that operate in accordance with the standard architecture are:

● Device 12 - Fixed pickup overspeed

● Device 12 - Variable pickup overspeed

● Device 14 - Fixed pickup underspeed

● Device 14 - Variable pickup underspeed

● Device 37 - Fixed pickup undercurrent

● Device 37 - Variable pickup undercurrent

● Device 37P - Fixed pickup underpower

● Device 39 - Mechanical condition monitor - Fixed pickup torque pulsation

● Device 46_2 - Phase-balance current - Fixed pickup negative sequence overcurrent

● Device 49RTD - Machine thermal overload - Fixed pickup RTD protection

● Device 50 - Fixed pickup instantaneous overcurrent

● Device 51 - Fixed pickup inverse time overcurrent

● Device 55 - Fixed pickup maximum power factor

● Device 55 - Fixed pickup minimum power factor

● Device 59G - Fixed pickup definite minimum time zero sequence overvoltage

● Device 81 - Fixed pickup overfrequency

● Device 81 - Variable pickup overfrequency

● Device 81 - Fixed pickup underfrequency

● Device 81 - Fixed pickup high frequency rate of change

The standard block compares a protection variable to a reference which is referred to in the block diagram as the pickup level. To illustrate, for the fixed underspeed protection, the reference would be motor speed, and the pickup level would be the Fixed Underspeed Pickup Level (7218).

The comparator can be configured to make the block an "over" function (a trip or alarm can be generated when the protection variable is higher than the pickup level) or an "under" function (a trip or alarm can be generated when the protection variable is lower than the pickup level). Adjustable low pass filtering is accomplished on both the protection variable and the pickup level prior to the variables being applied to the greater than or less than comparator function.

A true state (logic one) at the output of the comparator indicates that a pickup is occurring and that a trip or alarm may result. The pickup condition modifies the threshold of the comparator with a programmable amount of hysteresis to avoid excessive toggling due to noise in the reference or protection variable. The amount of hysteresis is determined as a percentage of the pickup level by the adjustable parameter referred to as the dropout level.

The block uses two counters to control the generation of an alarm or trip output. The output can be used as a trip signal or as an alarm signal where the alarm can be set to a latched mode or an unlatched mode. The two counters are the pickup time delay counter and the dropout time delay counter. The pickup time delay counter is used to delay the time between a pickup and the generation of a trip or alarm signal. The pickup time delay is a programmable parameter that can be adjusted over a range that depends on the particular protection variable being used.The

Advanced Motor Protection Parameters4.1 Standard Protections Block Diagram


dropout time delay counter is used to delay the reset of the pickup timer if the protection variable changes such as to cause the pickup signal to return to a false (logic zero) condition.

In the simplest case of operation, the protection variable exceeds the pickup level and remains there. The pickup time delay counter would start counting until the value of the counter exceeds the "pickup time delay" and a trip or alarm would be generated. The dropout time delay counter has no involvement in this simplest type of operation. This case is shown in the top line of figure Various Pickup and Dropout Time Delay Counter Various Examples of Operation for the cases of latched and unlatched operation.

Figure 4-2 Various Pickup and Dropout Time Delay Counter Examples of Operation

The dropout time delay counter is used to reset the pickup time delay counter when the pickup condition disappears. The second line of Various Pickup and Dropout Time Delay Counter Examples of Operation shows the case where the pickup signal goes to zero for a time greater than the value of the dropout time delay. The dropout time delay is a programmable parameter that is shown in figure Generalized Protection Function Block Diagram. The dropout time delay counter counts up once the pickup signal becomes false and resets the pickup time delay counter.



The bottom two rows of the second figure shown show more complex behaviors involving shorter time variations of the pickup signal.

Boolean Logic equations for the counters are

Pickup Counter● Count = /Pickup timed out * enabled * pickup● Reset = Reset (ext) + Dropout timed out

Dropout Counter● Count = /(/Pickup * /Pickup timer) * (/Pickup timed out + /Latch

control * Pickup timed out)● Reset = /(Dropout timed out + /Dropout) * (Pickup timed out * Latch

control) + Reset (ext)where:/ indicates a logical inversion (not)+ indicates a logical OR* indicates a logical AND

Fixed Pickup Protections Fixed pickup protection functions allow a single pickup level to be programmed that remains a constant over the entire operating speed range of the drive.

Example: For fixed pickup overspeed protection, when the speed of the machine exceeds the programmed pickup level then the logic of the standard block diagram starts the pickup timer. If the pickup condition persists for longer than the programmed time then a trip or alarm will occur.

The pickup level is independent of the speed setting (speed demand) of the drive.

Demand Dependency for Variable Pickup Protections Variable pickup protection functions allow a pickup level to be programmed as a function of the commanded speed of the drive (speed demand). The pickup levels are entered as a set of 20 points starting from 0% demand to 190% demand setting. Linear interpolation is used between the points.

Example: If a 10% overspeed pickup is set at 0% demand and a 20% overspeed pickup is set at 10% demand, the effective pickup level at 5% demand will be 15%. The pickup level will remain constant at the 190% demand setting for demand settings in excess of 190%. If the 190% demand setting pickup level is set to 210%, the pickup level at 200% demand will also be 210%. See Figure Variable Pickup Undercurrent.To further illustrate, assume that the variable pickup undercurrent function is being used; and the pickup levels are set to the values shown in column 2 of Table "Pickup Level Settings for Level Settings for Variable Undercurrent Protection Example".

Table 4-1 Pickup Level Settings for Variable Undercurrent Protection Example

Speed Demand (%) Undercurrent Pickup Level (%)0 1010 1020 10



Speed Demand (%) Undercurrent Pickup Level (%)30 1040 2050 3060 4070 5070 5590 60100 75110 75120 75130 75140 75150 75160 75170 75180 75190 60

The resulting speed demand dependent pickup levels as shown in the figure titled "Variable Pickup Undercurrent Graph " shown below.

Variable Pickup Undercurrent

Speed Demand

Pickup Level

Undercurrent

(%)

(%)

250200150100500

80

70

60

50

40

30

20

10

0

Figure 4-3 Variable Pickup Under Current Graph

Thermal OverloadThe thermal overload protection functions use a thermodynamic model of the machine to predict the total amount of thermal capacity (basically margin to maximum temperature) that has been used as the machine temperature increases. A value of 100% thermal capacity used would imply that the machine is at the maximum allowable temperature. The thermal model uses a k-factor to adjust the value of current at which the machine will eventually reach full rated



temperature at maximum rated ambient temperature. There are also heating, cooling, and stopped thermal time constants that dynamically adjust the model to match how quickly the machine will heat up and cool down either when moving or when stopped.

A fixed thermal overload protection function and a variable thermal overload function are provided. The fixed thermal overload function allows the use of a fixed value (does not vary with the drive speed demand setting) of k-factor and the time constants. The variable thermal overload function allows the k-factor, the heating time constant, and the cooling time constant to be made a function of the speed demand setting. The parameters are programmed over a range of speed demand setting from 0 to 190% in the same way as the pickup parameters are set for the variable pickup level protection functions. The k-factor would be adjusted as a function of speed to account for changes in the machine losses as the electrical frequency changes. The time constants would be adjusted to account for changes in the heat transfer characteristics of the machine as the speed changes.

See alsoInstallation External Wiring (Page 27)

IEEE Device Numbers and Functions (Page 169)



4.2 IntroductionThe next chapters of this manual provide a brief of description of each AMP device protection. Additional technical data, including keypad and tool parameter text, ID, units, and values are shown in table format which provideds the end-user with easy access to device specific data. Where applicable, block diagrams, equations, and curves are also provided.

AMP Hardware Block DiagramTo better understand advanced motor protection hardware provided with your drive, refer to the AMP Hardware Block Diagram. Along with the type of hardware, the input to the 4-channel and 8-channel RTDs, the PLC input, Ethernet Switch, RTD channels, and power are depicted.

Advanced Motor Protection Parameters4.2 Introduction


Ethernet

Power

8 Resistance Temperature Detectors

4 Resistance Temperature Detectors

+24V Power

Detector Module

Resistance Temperature

8 Channel

Module

Detector

Temperature

Resistance

4 Channel

Controller

Logic

Programmable

Switch

Ethernet

1200-S7

Figure 4-4 AMP Hardware Block Diagram

Per-unit Values

All the AMP functions use per-unit values to set pickup and dropout levels as well as speed-based enables. In a per-unit system, engineering quantities (such as voltages or currents) are normalized to their rated or maximum values. The value of the resultant per-unit values is typically zero to one although the values can be and are often expressed in percentages. The AMP system uses percentage values to set per-unit quantities. Voltage, current, frequency,



power, torque, and speed are per-unit quantities in the AMP. Time, temperature, and power factor are not handled as per-unit quantities and are expressed in units of seconds and degrees Celsius or Fahrenheit, power factor does not have any associated units. For example, consider a 1 MW machine with a rated voltage of 4160 V, and a full load current of 162A with a rated speed of 1785 RPM that is designed to operate with 60 Hz power. This is a four-pole machine, so the synchronous speed of the machine is 1800 RPM. The relationship between the engineering units and per-unit quantities are shown in the table titled, "Per-unit Engineering Unit Quantities".

Table 4-2 Example of per-unit and engineering unit quantities

Quantity 1 Per Unit Value (100%)Speed 1800 RPMPower 1 MWCurrent (positive or negative sequence) 162 ARMSTorque 5350 N-mVoltage (line-to-line, positive or negative sequence) 4160 VRMSVoltage (zero sequence) 2402 VRMSFrequency 60 Hz



4.3 Protection Function Enable TypesThere are four types of enables used to control startup and disabling of the protection functions. They are: Startup Time, Minimum Speed Enable, Minimum Speed Reset, and Fixed Torque Pulsation Minimum Speed Enable.

The following paragraphs describe the operation of the various enables.

1. Startup Time is used to delay the startup of the protection function from the time that the run command is issued. Following startup, the protection function will remain disabled until the startup time has elapsed. Once the Startup Time has been met, the protection function will be enabled unless another startup function continues to disable the protection function. The startup time delay will be repeated if the drive is stopped and then started again.

2. Minimum Speed Enable is used to delay the startup of the protection function until the machine achieves a minimum speed. Once the speed of the machine exceeds the Minimum Speed Enable setting, the function is enabled and will remain enabled until the drive is stopped (stop command, trip, etc.) unless another startup function continues to disable the protection function (such as Startup Time). The function will remain enabled even if the speed is reduced below the Minimum Speed Enable setting once that setting has been exceeded for the first time. The Minimum Speed Enable is reset when the drive is stopped, and the minimum speed will have to be reached again if the drive is stopped and then started again.

3. Minimum Speed Reset is used to disable a protection function when the speed demand is less than a specified value. When the demand setting is below the Minimum Speed Reset setting, the protection function is reset. Any startup time delay or minimum speed enable will be reset and the conditions of those enables will have to be met before the protection function will be enabled again.

4. Fixed Torque Pulsation Minimum Speed Enable is a unique enable applicable only to the excessive torque pulsation protection function. The setting resets the protection when the motor speed is below the setting. This setting should be used to avoid trips due to conditions where low motor speed is likely to result in false trips due to the finite sampling window of the torque pulsation function.

Advanced Motor Protection Parameters4.3 Protection Function Enable Types


RTD Terminal Connections 55.1 Installation External Wiring

Installation External WiringCustomer-supplied low-voltage control cables enter via access plates in the top or bottom of the VFD enclosure. Refer to the project drawings for access plate locations.

Customer-supplied Resistance Temperature Detector (RTD) extension wiring terminates to terminal block TB2RTD in the VFD enclosure. An example is shown below in figure RTD Termination Diagram. Refer to the project drawings for complete TB2RTD layout details.

Figure 5-1 RTD Termination Diagram (for internal and external wiring)

Note

Customer must loop-back (short) all unused RTD inputs. Doing so avoids interference pickup on unused channels which can couple into the channels that are being used. Ensure all unused RTD inputs are shorted to earth ground. Refer to figure Internal and External Wiring for Unused RTD inputs.


Figure 5-2 Internal and External Wiring for Unused RTD Inputs

See alsoStandard Protections Block Diagram (Page 17)

RTD Terminal Connections5.1 Installation External Wiring


Advanced Motor Protection and RTD Protection Functions 66.1 Top Level Menu and Submenus

The following tables contain the Advanced Motor Protection parameters. Refer to the NXGpro Control Manual (A5E33474566) to view the GH180 standard motor protection parameters.

This menu item is located at the end of the menu for Drive Protections - "Drive Protect" (7) and follows menu "Thermal OT Rollback" (7170) in menu (7).

Note

Menu 7 is the top of the 7000 series Drive Protect parameters.

Parameter ID Unit Default Min Max DescriptionAdvanced Motor Protec‐tion

7180 Sub-menu Advanced Motor Protection Features

Advanced Motor Protect Menu (7180) ParametersParameter ID Unit Default Min Max DescriptionTemperature Units 7173 degree Celsius Temperature Units that apply to all temper‐

ature entries selectable by means of a drop-down menu:● Celsius● Fahrenheit

Fixed Over Speed 7181 Sub-menu Device 12 - Fixed Pickup OverspeedVariable Over Speed 7189 Sub-menu Device 12 - Variable Pickup OverspeedFixed Under Speed 7217 Sub-menu Device 14 - Fixed Pickup UnderspeedVariable Under Speed 7226 Sub-menu Device 14 - Variable Pickup UnderspeedFixed Under Current 7256 Sub-menu Device 37 - Fixed Pickup UndercurrentVariable Under Current 7266 Sub-menu Device 37 - Variable Pickup UndercurrentFixed Under Power 7297 Sub-menu Device 37P - Fixed Pickup UnderpowerFixed Torque Pulsation 7306 Sub-menu Device 39 - Mechanical Condition Monitor -

Fixed Pickup Torque PulsationFixed NegSeq Over I 7316 Sub-menu Device 46_2 - Phase Balance Current -

Fixed Pickup Negative Sequence Overcur‐rent

Maximum Start Time 7325 Sub-menu Device 48 - Incomplete Sequence - Maxi‐mum Start Time

Maximum Stop Time 7330 Sub-menu Device 48 - Incomplete Sequence - Maxi‐mum Stop Time


Advanced Motor Protect Menu (7180) ParametersParameter ID Unit Default Min Max DescriptionFixed Thermal Overload 7335 Sub-menu Device 49T - Machine Thermal Model -

Fixed Parameter Thermal OverloadVar. Thermal Overload 7352 Sub-menu Device 49T - Machine Thermal Model - Var‐

iable Thermal OverloadRTD Protection 7429 Sub-menu Device 49RTD - Machine Thermal Overload

- Fixed Pickup RTD ProtectionFixed Inst. OverCurrent 7515 Sub-menu Device 50 – Fixed Pickup Instantaneous

OvercurrentFixed ZeroSeq OverVolt 7524 Sub-menu Device 59G – Fixed Pickup Definite Mini‐

mum Time Zero Sequence OvervoltageInverseTime OverCurrent 7533 Sub-menu Device 51 – Fixed Pickup Inverse Time

OvercurrentInst. Zero Seq OverVolt 7563 Sub-menu Device 59G - Fixed Pickup Instantaneous

Zero Sequence OvervoltageFixed Max Power Factor 7572 Sub-menu Device 55 - Fixed Pickup Maximum Power

FactorFixed Min Power Factor 7581 Sub-menu Device 55 - Fixed Pickup Minimum Power

FactorMin Starting Interval 7590 Sub-menu Device 66 – Notching or jogging – Starts Per

HourMax Cold Starts per hr 7593 Sub-menu Device 66 – Notching or jogging – Cold

Starts Per HourMax Hot Starts per hr 7598 Sub-menu Device 66 – Notching or jogging – Hot Starts

Per HourMin Therm Cap to Start 7603 Sub-menu Device 66 – Notching or jogging – Maximum

Thermal Capacity Used to StartFixed Over Frequency 7606 Sub-menu Device 81 - Fixed Pickup OverfrequencyVariable Over Frequency 7615 Sub-menu Device 81 - Variable Pickup OverfrequencyFixed Under Frequency 7645 Sub-menu Device 81 - Fixed Pickup UnderfrequencyVariable Underfreq 7654 Sub-menu Device 81 - Variable Pickup UnderfrequencyFixed High-Freq Rate 7684 Sub-menu Device 81 - Fixed Pickup High Frequency

Rate of Change

Advanced Motor Protection and RTD Protection Functions6.1 Top Level Menu and Submenus


6.2 Device 12 - Fixed Pickup OverspeedOverviewFixed pickup overspeed is used to protect the motor and connected load against excessive speed. The fixed pickup overspeed function provides a single speed point setting that produces a trip or alarm condition when that speed is exceeded. The function can be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss

Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.

Device 12 provides parameter settings as shown in table Advanced Motor Protection Menu - Fixed Pickup Over Speed.

Table 6-1 Advanced Motor Protection Menu - Fixed Pickup Over Speed (ID 7181)

Keypad Parameter TextTool Parameter Text

ID Units DefaultValue

Minimum - Maximum Value

Pickup LevelFixed Overspeed Pickup Level

7182 % 110 0 - 200

Pickup DelayFixed Overspeed Pickup Delay

7183 sec 1 0 - 6000

Dropout LevelFixed Overspeed Dropout Level

7184 % 2 0 - 50

Dropout DelayFixed Overspeed Dropout Delay

7185 sec 0.1 0 - 6000

Low Pass Time ConstantFixed Overspeed Low Pass Time Con‐stant

7186 msec 0 0 - 1000

Startup TimeFixed Overspeed Delay from Startup

7187 sec 0 0 - 6000

Picklist ID Units DefaultValue

Values

Enable StateFixed Pickup Overspeed Enable State

7188 Disabled ● Disabled● Alarm● Latched/Alarm● Trip

The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Fixed Pickup Overspeed is mutually exclusive with Variable Pickup Overspeed.

Advanced Motor Protection and RTD Protection Functions6.2 Device 12 - Fixed Pickup Overspeed


Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Speed

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >

Figure 6-1 Overspeed Protection Diagram

Advanced Motor Protection and RTD Protection Functions6.2 Device 12 - Fixed Pickup Overspeed


6.3 Device 12 - Variable Pickup OverspeedOverviewVariable pickup overspeed is used to protect the motor and connected load against excessive speed or to detect conditions under which the motor speed has risen in excess of the desired setpoint. The variable pickup overspeed function provides a curve of overspeed points as a function of the commanded motor speed. A trip or alarm condition occurs when that speed is exceeded. The function can be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 12 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Over Speed.

Table 6-2 Advanced Motor Protection Menu - Variable Pickup Over Speed (ID 7189)

Keypad Parameter TextTool Parameter Help Text

ID Units Default Val‐ue


OverSpeed CurveOverSpeed Curve

7190 Sub-menu

Pickup DelayVariable Overspeed Pickup Delay

7211 sec 1 0 - 6000

Dropout LevelVariable Overspeed Dropout Level

7212 % 2 0 - 50

Dropout DelayVariable Overspeed Dropout Delay

7213 sec 0.1 0 - 6000

Low Pass Time ConstantVariable Overspeed Low Pass Time Constant

7214 msec 0 0 - 1000

Startup TimeVariable Overspeed Delay from Startup

7215 sec 0 0 - 6000


Values

Enable StateVariable Pickup Overspeed Enable State

7216 Disabled ● Disabled● Alarm● LatchedAlarm● Trip

Advanced Motor Protection and RTD Protection Functions6.3 Device 12 - Variable Pickup Overspeed


OverSpeed Curve Menu (7190)




0% Speed PickupDefine Pickup Level in %Speed at 10% Demanded Speed

7191 % 10 0 - 250


7192 % 20 0 - 250


7193 % 30 0 - 250

30% Speed PickupDefine Pickup Level in %Speed 40% Demanded Speed

7194 % 40 0 - 250


7195 % 50 0 - 250


7196 % 60 0 - 250


7197 % 70 0 - 250


7198 % 80 0 - 250


7199 % 90 0 - 250


7200 % 100 0 - 250


7201 % 110 0 - 250

110% Speed PickupDefine Pickup Level in %Speed at-120% Demanded Speed

7202 % 120 0 - 250


7203 % 130 0 - 250


7204 % 140 0 - 250







7205 % 150 0 - 250


7206 % 160 0 - 250


7207 % 170 0 - 250


7208 % 180 0 - 250


7209 % 190 0 - 250


7210 % 200 0 - 250

The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Variable Pickup Overspeed is mutually exclusive with Fixed Overspeed.



Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Speed

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >

Figure 6-2 Overspeed Protection Diagram



6.4 Device 14 - Fixed Pickup UnderspeedOverviewFixed pickup underspeed is used to protect the motor and connected load against operation at speeds below the desired speed. The fixed pickup underspeed function provides a single underspeed point setting that produces a trip or alarm condition when that speed falls below that value. The function offers a minimum speed enable that only allows activation of this function after the programmable minimum speed has been reached. Once the minimum speed has been reached, the function remains enabled regardless of speed until the drive stops. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


NoteSetting Fixed Pickup and Variable Pickup Underspeed Protection Parameters

When setting Fixed Pickup and Variable Pickup Underspeed Protection Parameters, ensure that settings are consistent with drive capabilities and with the settings of the accelerationramp settings, Refer to the relevant NXGpro Control Manual (A5E33474566) provided with your drive.

Device 14 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Underspeed.

Table 6-3 Advanced Motor Protection Menu - Fixed Pickup Underspeed Device (ID 7217)




Pickup LevelFixed Underspeed Pickup Level

7218 % 5 0 - 100

Pickup DelayFixed Underspeed Pickup Delay

7219 sec 1 0 - 180

Dropout LevelFixed Underspeed Dropout Level

7220 % 102 100 - 200

Dropout DelayFixed Underspeed Dropout Delay

7221 sec 0.1 0 - 180

Low Pass Time ConstantFixed Underspeed Low Pass Time Constant

7222 msec 0 0 - 1000

Minimum Speed Enable 7223 % 50 0 - 100Startup TimeFixed Pickup Underspeed Delay from Startup

7224 sec 0 0 - 200

Advanced Motor Protection and RTD Protection Functions6.4 Device 14 - Fixed Pickup Underspeed



Values

Enable StateFixed Underspeed w/ Min Speed Enable - Enable State

7225 0 Disabled ● Disabled● Alarm● LatchedAlarm● Trip

The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Fixed Pickup Underspeed is mutually exclusive with Variable Pickup Underspeed.

Pickup

Timed

Out

Dropout

Timed

Out

1 - Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Speed

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ <

Figure 6-3 Underspeed Protection Diagram

Advanced Motor Protection and RTD Protection Functions6.4 Device 14 - Fixed Pickup Underspeed


6.5 Device 14 - Variable Pickup UnderspeedOverviewVariable pickup underspeed is used to protect the motor and connected load against operation at lower speeds than desired or to detect conditions under which the motor speed has fallen below the desired setpoint due to problems with excessive load torque or torque production difficulties in the machine. The variable pickup underspeed function provides a curve of speed points as a function of the commanded motor speed. A trip or alarm condition occurs when that speed falls below the curve at a given speed setting. The function offers a minimum speed enable that only allows activation of this function after the programmable minimum speed has been reached. Once the minimum speed has been reached, the function remains enabled regardless of speed until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


NoteSetting Fixed Pickup and Variable Pickup Underspeed Protection Parameters

When setting Fixed Pickup and Variable Pickup Underspeed Protection Parameters, ensure that settings are consistent with drive capabilities and with the settings of the accelerationramp settings, Refer to the relevant NXGpro Control Manual NXGpro Control Manual (A5E33474566) provided with your drive.

Device 14 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Underspeed .

Table 6-4 Advanced Motor Protection Menu - Variable Pickup Underspeed (ID 7226)



Minimum - Maximum Val‐ue

UnderSpeed CurveUnderSpeed Curve

7227 Sub-menu

Pickup DelayVariable Underspeed w/ Min Speed Enable Pickup Delay

7248 sec 1 0 - 6000

Dropout LevelVariable Underspeed w/ Min Speed Enable Drop‐out Level

7249 % 102 100 - 200

Dropout DelayVariable Underspeed w/ Min Speed Enable Drop‐out Delay

7250 sec 0.1 0 - 600

Advanced Motor Protection and RTD Protection Functions6.5 Device 14 - Variable Pickup Underspeed





Low Pass Time ConstantVariable Underspeed w/ Min Speed Enable Low Pass Time Constant

7251 msec 0 0 - 1000

Minimum SpeedVariable Underspeed w/ Min Speed Enable Point

7252 % 0 0 - 100

Minimum Speed ResetVariable Underspeed w/ Min Speed Enable Speed Reset Point

7253 % 10 0 - 100

Startup TimeVariable Underspeed w/ Min Speed Enable from Startup

7254 sec 0 0 - 6000


Values

Enable StateVariable Underspeed Enable State


UnderSpeed Curve Menu (7227)





7228 % 0 0 - 200


7229 % 0 0 - 200


7230 % 10 0 -200


7231 % 20 0 - 200


7232 % 30 0 - 200


7233 % 40 0 - 200


7234 % 50 0 - 200







7235 % 60 0 - 200


7236 % 70 0 - 200


7237 % 80 0 - 250


7238 % 90 0 - 200


7239 % 100 0 - 200


7240 % 110 0 - 200


7241 % 120 0 - 200


7242 % 130 0 - 200


7243 % 140 0 - 200


7244 % 150 0 - 200


7245 % 160 0 - 200


7246 % 170 0 - 200


7247 % 180 0 - 200

The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Variable Underspeed is mutually exclusive with Fixed Underspeed.



Pickup

Timed

Out

Dropout

Timed

Out

1 - Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Speed

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ <

Figure 6-4 Underspeed Protection Diagram



6.6 Device 37 - Fixed Pickup UndercurrentOverviewFixed pickup undercurrent is used to protect the motor against operation with RMS phase currents that are below the desired level. The fixed pickup undercurrent function provides an RMS phase current setting that produces a trip or alarm condition when the current falls below that value. The function can be programmed to produce a trip or an alarm when any one, any two, or all three of the phase currents (Phase A, Phase B, Phase C RMS currents) is below the set point. The function offers a minimum speed enable that only allows activation of this function after the programmable minimum speed has been reached. Once the minimum speed has been reached, the function remains enabled regardless of speed until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 37 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Undercurrent.

Table 6-5 Advanced Motor Protection Menu - Fixed Pickup Undercurrent Device (ID 7256)




Pickup LevelFixed Under Current Pickup Level

7257 % 5 0 - 100

Pickup DelayFixed Under Current Pickup Delay

7258 sec 1 0 - 180

Dropout LevelFixed Under Current Dropout Level

7259 % 102 100 - 200

Dropout DelayFixed Under Current Dropout Delay

7260 sec 0.1 0 - 180

Low Pass Time ConstantFixed Under Current Low Pass Time Constant

7261 msec 0 0 - 1000

Minimum Speed EnableFixed Under Current Enable Point

7262 % 20 0 - 100

Startup TimeFixed Under Current Delay from Startup

7263 sec 5 0 - 200

Advanced Motor Protection and RTD Protection Functions6.6 Device 37 - Fixed Pickup Undercurrent



Values

Enable StateFixed Under Current Enable State


Phase SelectionFixed Under Current Select Phases to Monitor

7265 Any Phase ● Any Phase● Any Two Phases● All Phases

The maximum response time with zero delay (pickup counter=0) is 10 milliseconds. Fixed Pickup Under Current is mutually exclusive with Variable Pickup Under Current.

Pickup

Timed

Out

Dropout

Timed

Out

1 - Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

RMS Phase

Current

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ <

Figure 6-5 UnderCurrent Protection

Advanced Motor Protection and RTD Protection Functions6.6 Device 37 - Fixed Pickup Undercurrent


6.7 Device 37 - Variable Pickup UndercurrentOverviewVariable pickup undercurrent is used to protect the load / system operation with RMS phase currents that are below the desired level where sensitivity to the speed demand setting is important. The variable pickup undercurrent function provides a curve of undercurrent set points as a function of the commanded motor speed. A trip or alarm condition occurs when the current falls below the curve at a given speed setting. The function can be programmed to produce a trip or an alarm when any one, any two, or all three of the phase currents is below the set point. The function offers a minimum speed enable that only allows activation of this function after the programmable minimum speed has been reached. Once the minimum speed has been reached, the function remains enabled regardless of speed until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 37 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Undercurrent .

Table 6-6 Advanced Motor Protection Menu - Variable Pickup Undercurrent Device (ID 7266)


ID Default Value

Units Minimum - Maximum Value

Under Current Curve 7267 Sub-menuPickup DelayVariable Underspeed Pickup Delay

7288 1 sec 0 - 180

Dropout LevelVariable Underspeed Dropout Level

7289 102 % 100 - 200

Dropout DelayVariable Underspeed Dropout Delay

7290 0.1 sec 0 - 180

Low Pass Time ConstantVariable Underspeed Low Pass Time Constant

7291 0 msec 0 - 1000

Minimum SpeedVariable Underspeed Enable Point

7292 20 % 0 - 100

Minimum Speed ResetVariable Underspeed Speed Reset Point

7293 10 % 0 - 100

Startup TimeVariable Underspeed from Startup

7294 5 sec 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.7 Device 37 - Variable Pickup Undercurrent


Picklist ID Units Default Value

Values

Enable StateVariable Under Current w/ Min Speed Enable - Enable State

7295 Disa‐bled

● Disabled● Alarm● LatchedAlarm● Trip

Phase SelectionVariable Under Current Select Phases to Monitor

7296 Any Phase

● Any Phase● Any Two Phases● All Phases

Under Current Curve Menu (7267)


ID Default Value


0% Speed PickupDefine Pickup Level in % of FLA at at 0% Demanded Speed

7268 0 % -1 - 200

10% Speed PickupDefine Pickup Level in % of FLA at 10% Demanded Speed

7269 0.9 % 0 - 200


7270 3.6 % 0 -200


7271 8.1 % 0 - 200


7272 14.4 % 0 - 200


7273 22.5 % 0 - 200


7274 32.4 % 0 - 200


7275 44.1 % 0 - 200


7276 57.6 % 0 - 200


7277 72.9 % 0 - 250


7278 90 % 0 - 200


7279 90 % 0 - 200


7280 90 % 0 - 200


7281 90 % 0 - 200


7282 90 % 0 - 200




ID Default Value



7283 90 % 0 - 200


7284 90 % 0 - 200


7285 90 % 0 - 200


7286 90 % 0 - 200


7287 90 % 0 - 200

The maximum response time with zero delay (pickup counter=0) is 10 milliseconds. Variable Pickup Undercurrent is mutually exclusive with Fixed Pickup Undercurrent.

Pickup

Timed

Out

Dropout

Timed

Out

1 - Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

RMS Phase

Current

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ <

Figure 6-6 Undercurrent Protection Diagram



6.8 Device 37P - Fixed Underpower Relay OverviewFixed pickup underpower is used to protect the motor and connected load against operation at power levels below desired. The fixed pickup underpower function provides a single power point setting that produces a trip or alarm condition when the power falls below that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 37P provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Underpower Relay.

Table 6-7 Advanced Motor Protection Menu - Fixed Pickup Underpower Relay (ID 7297)




Pickup LevelFixed Under Power w/ Min Speed Enable Pickup Level

7298 % 5 0 - 100

Pickup DelayFixed Under Power w/ Min Speed Enable Pickup Delay

7299 sec 1 0 - 180

Dropout LevelFixed Under Power w/ Min Speed Enable Drop‐out Level

7300 % 102 100 - 200

Dropout DelayFixed Under Power w/ Min Speed Enable Drop‐out Delay

7301 sec 0.1 0 - 180

Low Pass Time ConstantFixed Under Power w/ Min Speed Enable Low Pass Time Constant

7302 msec 0 0 - 1000

Minimum SpeedFixed Under Power w/ Min Speed enable Min Speed Enable Point

7303 % 20 0 - 100

Startup TimeFixed Under Power w/ Min Speed Enable Delay from Startup

7304 sec 5 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.8 Device 37P - Fixed Underpower Relay



Values

Enable StateFixed Under Power w/ Min Speed Enable - Ena‐ble State


The maximum response time with zero delay (pickup counter=0) is 10 milliseconds.

Pickup

Timed

Out

Dropout

Timed

Out

1 - Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Power

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ <

Figure 6-7 Underpower Protection Diagram

Advanced Motor Protection and RTD Protection Functions6.8 Device 37P - Fixed Underpower Relay


6.9 Device 38 - Fixed Bearing Temperature Protective DeviceOverviewRefer to Device 49 - Machine Thermal Overload for parameters and settings.

Description● Input measurements:

– Uses any RTD protections identified as "bearing"

● Configuration parameters:

– Refer to Device 49 - Machine Thermal Overload for parameters and settings


Advanced Motor Protection and RTD Protection Functions6.9 Device 38 - Fixed Bearing Temperature Protective Device


6.10 Device 39 - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation

OverviewFixed pickup torque pulsation is used to protect the motor and connected load against operation under conditions of high torque pulsation. The fixed pickup torque pulsation function provides a single RMS torque pulsation point setting that produces a trip or alarm condition when RMS torque pulsation rises above that value. The function can be enabled when above a minimum speed. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.

Device 39 provides parameter status as shown in table Advanced Motor Protection Menu - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation.

Table 6-8 Advanced Motor Protection Menu - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation (ID 7306)




Pickup LevelFixed Torque Pulsation Pickup Level

7307 % 5 0 - 100

Pickup DelayFixed Torque Pulsation Pickup Delay

7308 sec 1 0 - 180

Dropout LevelFixed Torque Pulsation Dropout Level

7309 % 2 0 - 50

Dropout DelayFixed Torque Pulsation Dropout Delay

7310 sec 0.1 0 - 180

Low Pass Time ConstantFixed Torque Pulsation Low Pass Time Constant

7311 msec 0 0 - 1000

Minimum Speed EnableFixed Torque Pulsation Enable Point

7312 % 20 5 - 100

Startup TimeFixed Torque Pulsation Delay from Startup

7313 sec 5 0 - 200

Window DurationFixed Torque Pulsation Trms Calc Window Duration

7314 sec 0.1 0.01 - 5


Values

Enable StateFixed Torque Pulsation Enable State


DescriptionTorque producing current and motor flux associated with motor operation allows for the calculation of motor torque as the product of torque producing current (iqs) and the machine magnetic flux (λs). The torque producing current is the component of machine current that is in phase with the machine voltage. A given machine has a maximum rated value of torque producing current that combines with any flux producing current to form the overall rated stator

Advanced Motor Protection and RTD Protection Functions6.10 Device 39 - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation


current. The torque producing current (iqs) is scaled using a per unit system with one per unit iqs equal to the rated value of iqs for the particular machine being used. Similarly, the rated magnetic flux (stator flux) is scaled such that one per unit flux has been achieved when the machine exhibits rated voltage at rated speed.

The per-unit torque is then given by:

perunit qs sT i λ= ×

Figure 6-8 Per Unit Torque

The torque should be steady and continuous but may contain small amounts of amplitude variation over time. Typically, these variations occur over fixed amounts of time and tend to repeat over those fixed amounts of time.

The torque can be resolved into two components, one component being the torque average value and the other being small amplitude variation (or cyclical component) that can be added together to obtain the total torque. Torque pulsation protection focuses on the time duration varying part, specifically the RMS value of the pulsating part of the torque.

The protection calculates RMS torque pulsation by sampling and recording the torque over a specific length time window. The window of time is selectable and should be chosen to be long enough to contain several cycles of torque variation. The window will contain N samples of torque (T(n)). The mean of the dataset is first calculated:

11( )

n

mean

N

T T nN

=

= ∑

Figure 6-9 Mean of Torque Dataset

The mean is subtracted from the torque to obtain only the pulsating part. The RMS value of the remaining pulsating part is calculated:

( )1

21( )

n

rms mean

N

T T n TN

=

= −∑

Figure 6-10 RMS Value of Pulsating Torque

The RMS torque is used as an input to a standard protection block and can be configured in the same manner as other protection functions that are based on the standard protection block diagram.

The maximum response time must be calculated at full speed

.

The Advanced Motor Protection function design for RMS Torque Pulsation is shown below.



Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup0 = dropout

RMS Torque

Pulsa!on

Pickup

Level

Low Pass

Filter

>=

>=

+

-Σ

>

Figure 6-11 Torque Pulsation Diagram



6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay

OverviewFixed pickup negative sequence overcurrent is used to protect the motor and connected load against operation under conditions of high negative sequence current or phase current imbalance. The fixed pickup negative sequence overcurrent function provides a single negative sequence overcurrent setting that produces a trip or alarm condition when the negative sequence current rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 46_2 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Negative Sequence Overcurrent.

Table 6-9 Advanced Motor Protection Menu - Phase Balance Current - Fixed Negative Sequence Over Current (ID 7316)




Pickup LevelFixed Negative Sequence Overcurrent Pickup Level

7317 % 5 0 - 100

Pickup DelayFixed Negative Sequence Overcurrent De‐lay Pickup Level

7318 sec 1 0 - 180

Dropout LevelFixed Negative Sequence Overcurrent Dropout Level

7319 % 2 0 - 50

Dropout DelayFixed Negative Sequence Overcurrent Dropout Delay

7320 sec 0.1 0 - 180

Low Pass Time ConstFixed Negative Sequence Overcurrent Low Pass Time Constant

7321 msec 0 0 - 1000

Minimum SpeedFixed Negative Sequence Overcurren Min Speed Enable Point

7322 % 20 0 100

Startup TimeFixed Negative Sequence Overcurrent De‐lay from Startup

7323 sec 5 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay



Values

Enable StateFixed Negative Sequence Overcurrent En‐able State


DescriptionThe maximum response time with zero delay (pickup counter=0) is 20 milliseconds.

The Advamced Protection function design for Negative Sequence Current is shown below.

Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup0 = dropout

Nega!ve Sequence

Current

Pickup

Level

Low Pass

Filter

>=

>=

+

-Σ

>

Figure 6-12 Negative Sequence Current Diagram

Advanced Motor Protection and RTD Protection Functions6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay


6.12 Device 48 - Incomplete Sequence Relay Device - Maximum Start TimeOverviewMaximum start time protects the motor against excessive time between starting and reaching a desired speed. The function produces a trip or alarm condition when the machine fails to reach an adjustable speed threshold in an adjustable time period following a start. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 48 provides parameter status as shown in table Advanced Motor Protection Menu - Maximum Start Time.

Table 6-10 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Start Time (ID 7325)




Maximum Start Time Incomplete Sequence Maximum Start Time Starting Time

7326 sec 10 0 - 180

Minimum SpeedIncomplete Sequence Maximum Start Time Minimum Speed

7327 % 50 0 - 200

Low Pass Time ConstIncomplete Sequence Maximum Start Time Low Pass Time Constant

7328 msec 0 0 - 1000


Values

Enable StateMaximum Start Time Enable State



Advanced Motor Protection and RTD Protection Functions6.12 Device 48 - Incomplete Sequence Relay Device - Maximum Start Time


6.13 Device 48 - Incomplete Sequence Relay Device - Maximum Stop TimeOverviewMaximum stop time protects the motor against excessive time between the stop command and dropping down to a desired speed. The function produces a trip or alarm condition when the machine fails to reach an adjustable speed threshold in an adjustable time period following a stop. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 48 provides parameter status as shown in table Advanced Motor Protection Menu - Incomplete Sequence - Maximum Stop Time

Table 6-11 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Stop Time (ID 7330)




Maximum Stop Time Incomplete Sequence Maximum Stop Time Stopping Time

7331 sec 10 0 - 180

Maximum SpeedIncomplete Sequence Maximum Stop Time Maximum Speed

7332 % 5 0 - 100

Low Pass Time ConstIncomplete Sequence Maximum Stop Time Low Pass Time Constant

7333 msec 0 0 - 1000


Values

Enable StateMaximum Stop Time Enable State

7334 ● Disabled● Alarm● LatchedAlarm● Trip


Advanced Motor Protection and RTD Protection Functions6.13 Device 48 - Incomplete Sequence Relay Device - Maximum Stop Time


6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload

OverviewThe fixed parameter thermal overload function uses a first order differential equation to track the amount of thermal capacity used in the machine as described in IEC 60255-149. Thermal capacity is used up as the machine temperatures approach maximum rated or allowable conditions. An equivalent heating current is calculated that takes into account the RMS phase currents of the machine as well as the amount of negative sequence current. The heat input to the machine is determined based on the square of the equivalent heating current divided by an adjustable rated current. The thermal capacity is adjusted based on thermal time constants for heating, cooling, or stopped conditions in the machine in accordance with a first order differential equation that accounts for heat inputs and heat outputs in the machine. The fixed parameter function uses single values of rated current, heating time constant, and cooling time constant. An adjustable threshold can be set to limit the maximum amount of thermal capacity used. The function reports a trip or alarm condition or can block starting of the motor when the thermal capacity used exceeds the programmed value. The thermal model of the machine can be biased by RTD measurements of ambient temperature and/or stator temperature. Ambient RTD readings are used to compensate for the effects of an ambient temperature other than rated, stator RTD readings are used to set minimum thermal capacity used values based on the stator temperature.

Device 49T provides parameter status as shown in table Advanced Motor Protection Menu - Machine Thermal Model - Fixed Parameter Thermal Overload.

Table 6-12 Advanced Motor Protection Menu - Machine Thermal Model - Fixed Parameter Thermal Overload (ID 7335)




Alarm Pickup Level 7336 % 80 0 - 150Trip Pickup Level 7337 % 100 0 - 150Heating Time Constant 7338 min 15 1 - 1000Cooling Time Constant 7339 min 15 1 - 1000Stopped Time Constant 7340 min 30 1 - 1000Curve k-factor 7341 1.15 1 - 1.5Negative Seq q-Factor 7342 4 0 - 15Tmax 7345 ° 180 50 - 572Tlimit 7346 ° 40 25 - 212Tmaxoper 7347 ° 130 50 -572HCSR 7348 1 0.1 - 1


Values

Use Ambient RTDs 7343 No Ambient ● No Ambient● Use Ambient

Use Stator RTDs 7344 No Stator ● No Stator● Use Stator

Advanced Motor Protection and RTD Protection Functions6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload



Values

Enable State Out1Fixed Parameter Thermal Overload Ena‐ble State

7350 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start

Enable State Out2Fixed Parameter Thermal Overload Ena‐ble State


Fixed Thermal Overload is mutually exclusive with Variable Thermal Overload.

Discussion of Fixed Parameter Thermal Overload Protection ModelThe thermal overload function uses a differential equation model to predict the amount of thermal capacity used. The equation calculates H(t), an H(t) value of 1.0 indicates that 100% of the thermal capacity of the machine has been used and basically that the machine is at the maximum allowable temperature.

The differential equation is given by:

( )( )

( )

2

eq

a

i t tH t F H t t

k t t

τ

τ τ

∆= + − ∆

+ ∆ + ∆

One of the inputs to the equation is ieq(t) is the equivalent heating current expressed in per unit. One per unit current in this context is equal to the rated current of the machine being protected. Both H(t) and ieq(t) are functions of time while the other variables in the equation are fixed (although adjustable) parameters.

The equivalent heating current is a function of the RMS value of the stator current and the negative sequence stator current. ieq(t) is given by:

i i qieq avg qi

= +2 2

Where:

ii i i

avgarms brms crms

=+ +

3

The equivalent current is a function of the average RMS stator current plus a term related to the negative sequence current i2. The q factor weights the negative sequence current in the calculation of the equivalent heating current ieq. The q factor should be adjusted to account for the additional heating effects of negative sequence current and in many cases of induction machines should be chosen to be equal to the ratio of negative sequence rotor resistance to the positive sequence rotor resistance.



Another parameter of the equation is the k-Factor which effectively scales the current, irated. The k factor is indicative of the amount of additional thermal capacity in the machine beyond operation at rated current in the rated ambient temperature environment. A k factor of greater than one implies that additional thermal capacity exists under rated operating conditions. Tau (τ) is the time constant which determines how fast changes in equivalent stator current affect the amount of thermal capacity used. The time constant is selected by the model depending on rather the machine is cooling, heating, or stopped. Delta t (Δt) is the sampling interval used to calculate the differential (difference) equation. The sampling time is set by the drive configuration and is on the order of a few milliseconds. The Fa term is used to account for operation in ambient temperatures other than the maximum rated ambient temperature. The Fa term is set equal to one unless RTD sensors are used to provide a measured ambient temperature. A more detailed discussion of the effect of Fa will be given later when the effects of RTD usage are presented. The time constant determines how quickly changes in effective current result in changes in the amount of thermal capacity used. A steady equivalent current will eventually drive the thermal capacity used to a steady state value.

The steady state value of H(t) is given by:

Hi

kF

steady state

eq

a− =

2

In the case where ambient temperature RTD(s) are not being used then the steady state equation becomes:

Hi

ksteady state

eq

− =

2

It can be seen that when the per unit (PU) equivalent stator current is equal to the k-Factor, then the thermal capacity used will eventually reach 100%. Note that H is scaled such that an H value of 1 corresponds to 100%.

The time constants determine how fast the thermal capacity changes in response to a change in the equivalent current ieq. There are three time constants that apply during different operating modes of the machine. The stopped time constant is used when the machine is stopped. The heating and cooling time constants are used when the machine is running. The heating time constant is used when the thermal capacity used is increasing and the cooling time constant is used when the thermal capacity used is falling.

Use of RTD(s) in the Thermal Overload Protection ModelRTDs that affect the thermal model are assigned to group names of either stator or ambient in the parameter menus for the particular RTD. The hottest RTD in each group is selected and the ambient or stator temperature is determined by that reading. The usage of ambient and/or stator temperature RTD readings in the thermal overload protection model is controlled by the model parameters named "Use Ambient RTDs" or "Use Stator RTDs". Either or both may be selected for use in the thermal model.

The ambient RTD group temperature affects the value of Fa as defined in the equation for Fa shown below.



FT T

T Ta

it

a

=−−

max lim

max

Tlimit is the maximum ambient temperature in which the machine is rated to operate. Ta is the actual value of ambient temperature as measured by the RTD(s) assigned to the "ambient" group. Ta is set equal to Tlimit in the case where no ambient temperature measurement is provided making the value of Fa equal to one. Tmax is the maximum operating temperature of the stator winding. As equation 4 shows, the value of Fa basically scales the steady state value of the amount of thermal capacity used. A high value of ambient temperature will increase the amount of steady state thermal capacity used while a low value of ambient temperature will decrease it. An ambient temperature in excess of Tmax will force the thermal capacity used to the saturation value of 500%.

The stator group temperature is used to determine a minimum value of thermal capacity used that is based on the stator temperature reading. The value of thermal capacity used that is predicted by the model is overridden when the value of thermal capacity used as determined by the stator RTD(s) is higher when the "use stator RTDs" parameter is selected such as to use the stator temperature measurement. The thermal capacity used based on the temperature reported by the stator RTD group is shown in "Thermal Capacity used as determined by Stator Temperature".

Thermal Capacity Used

Stator RTD Temperature

%0

(%)

Tlimit Tmaxoper Tmax

(1 – HCSR) x 100%

100%



Figure 6-13 Thermal Capacity used as determined by Stator Temperature

The variables Tlimit and Tmax are the maximum rated ambient temperature and the maximum allowable insulation temperature as earlier defined. The variable Tmaxoper is the operating temperature of the stator at full rated load and at an ambient temperature of Tlimit. The amount of thermal capacity used when the stator temperature is at Tmaxoper is determined based on the hot to cold stall ratio (HCSR) in accordance with the equation below:

H T T HCSRstator oper

=( ) = −( )max1

Note that H is scaled such that a value of H=1 corresponds to 100% thermal capacity used. The hot to cold stall ratio is defined as the ratio of the rated maximum stall time of a machine which has been operating at full rated load in a maximum rated ambient temperature environment for a time period long enough to reach thermal equilibrium to the maximum to the rated maximum stall time of a machine which has stabilized in the same ambient temperature environment without operating.

The value of HCSR will presumably be less than or equal to one since the allowable stall time with a hot stator winding should be less than the allowable stall time with a cold stator winding. For example, if the allowable stall time of a machine is 5 seconds with a cold stator, and 4 seconds with a hot stator, then the HCSR will be equal to 0.8 and the amount of thermal capacity used when the stator RTDs report a temperature equal to Tmaxoper will be 20%. When the stator RTD(s) are enabled, the thermal overload function will report the model predicted value if that value is greater than 20% or the value of 20% obtained from the stator temperature measurement.



6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload

OverviewThe variable parameter thermal overload function uses a first order differential equation to track the amount of thermal capacity used in the machine as described in IEC 60255-149. Thermal capacity is used up as the machine temperatures approach maximum rated or allowable conditions. An equivalent heating current is calculated that takes into account the RMS phase currents of the machine as well as the amount of negative sequence current. The heat input to the machine is determined based on the square of the equivalent heating current divided by an adjustable rated current. The thermal capacity is adjusted based on thermal time constants for heating, cooling, or stopped conditions in the machine in accordance with a first order differential equation that accounts for heat inputs and heat outputs in the machine. The variable parameter function uses values of rated current, heating time constant, and cooling time constant that are a function of the demand speed. An adjustable threshold can be set to limit the maximum amount of thermal capacity used. The function reports a trip or alarm condition or can block starting of the motor when the thermal capacity used exceeds the programmed value. The thermal model of the machine can be biased by RTD measurements of ambient temperature and/or stator temperature. Ambient RTD readings are used to compensate for the effects of an ambient temperature other than rated, stator RTD readings are used to set minimum thermal capacity used values based on the stator temperature.

Device 49T provides parameter status as shown in table Advanced Motor Protection Menu - Machine Thermal Model - Variable Parameter Thermal Overload

Table 6-13 Advanced Motor Protection Menu - Machine Thermal Model - Variable Thermal Overload (ID 7352)



Minimum - Maxium Value

Alarm Pickup LevelVariable Thermal Overload Alarm Pickup Level

7353 % 80 0 - 150

Trip Pickup LevelVariable Thermal Overload Trip Pickup

7354 % 100 1 - 1000

Heating Time ConstantHeating Time Constant

7355 sec 1 - 1000

Cooling Time ConstantCooling Time Constant

7376 sec 1 - 1000

Curve k-factor 7396 0.1 - 1.5Negative Seq q Factor 7419 4 0 - 15Use Ambient RTDs 7420 Use Ambient ● Use Ambient

● No AmbientUse Stator RTDs 7421 Use Stator ● Use Stator

● No StatorTmax 7422 ° 180 50 - 572Tlimit 7423 ° 40 25 - 212

Advanced Motor Protection and RTD Protection Functions6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload





Tmaxoper 7424 ° 130 50 -572HCSRVariable Parameter Thermal Overload Hot/Cold safe stall time ratio (HCSR) for Motor

7425 1 0.1 - 1


Values

Enable State Out1Fixed Parameter Thermal Overload Enable State


Enable State Out2Fixed Parameter Thermal Overload Enable State



The details of the variable thermal overload function are the same as in the case of the fixed thermal overload function except that three of the model parameters can be varied as a function of the speed command of the drive (% demand). Please refer to the fixed model function, (Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload (ID 7335), for the specific details and equations of the thermal overload model.

Heating Time Constant Menu (7355)




0% Speed HTimeConstDefine Time Constant in Seconds at 0% Speed Demnd

7356 min 30 1 - 1000

0% Speed HT1imeConstDefine Time Constant in Seconds at 10% Speed Demnd

7357 min 28.5 1 - 1000

20% Speed HTimeConstDefine Time Constant in Seconds at 20% Speed Demand

7358 min 27 1 - 1000


7359 min 25.5 1 - 1000


7360 min 24 1 - 1000







7361 min 22.5 1 - 1000


7362 min 21 1 - 1000


7363 min 19.5 1 - 1000


7364 min 18 1 - 1000


7365 min 16.5 1 - 1000


7366 min 15 1 - 1000

110% SpeedHTimeConstDefine Time Constant in Seconds at 110% Speed Demand

7367 min 15 1 - 1000


7368 min 15 1 - 1000

130% SpeedHTimeConst Define Time Constant in Seconds at 130% Speed Demand

7369 min 15 1 - 1000


7370 min 15 1 - 1000

150% SpeedHtimeConstDefine Time Constant in Seconds at 150% Speed Demand

7371 min 15 1 - 1000


7372 min 15 1 - 1000


7373 min 15 1 - 1000


7374 min 15 1 - 1000


7375 min 15 1 - 1000



Cooling Time Constant menu (7376)




0% Speed CTimeConstDefine Time Constant in Seconds at 0% Speed Demnd

7377 min 30 1 - 1000

0% Speed HT1imeConstDefine Time Constant in Seconds at 10% Speed Demnd

7378 min 28.5 1 - 1000

20% Speed CTimeConstDefine Time Constant in Seconds at 20% Speed Demand

7379 min 27 1 - 1000


7380 min 25.5 1 - 1000


7381 min 24 1 - 1000


7382 min 22.5 1 - 1000


7383 min 21 1 - 1000


7384 min 19.5 1 - 1000


7385 min 18 1 - 1000


7386 min 16.5 1 - 1000


7387 min 15 1 - 1000

110% SpeedCTimeConstDefine Time Constant in Seconds at 110% Speed Demand

7388 min 15 1 - 1000


7389 min 15 1 - 1000

130% SpeedCTimeConst Define Time Constant in Seconds at 130% Speed Demand

7390 min 15 1 - 1000


7391 min 15 1 - 1000







7392 min 15 1 - 1000


7393 min 15 1 - 1000


7394 min 15 1 - 1000


7395 min 15 1 - 1000


7396 min 15 1 - 1000

Thermal Overload Protection Model - Curve k-Factor Menu (7398)




0% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 0% Speed Demand

7399 0.75 0 - 1.5


7400 0.79 0 - 1.5


7401 0.83 0 - 1.5


7402 0.87 0 - 1.5


7403 0.91 0 - 1.5


7404 0.95 0 - 1.5


7405 0.99 0 - 1.5


7406 1.02 0 - 1.5


7407 1.06 0 - 1.5







7408 1.15 0 - 1.5


7409 1.1 0 - 1.5


7410 1.06 0 - 1.5


7411 1.02 0 - 1.5


7412 0.99 0 - 1.5


7413 0.95 0 - 1.5


7414 0.91 0 - 1.5


7415 0.87 0 - 1.5


7416 0.83 0 - 1.5


7417 0.79 0 - 1.5


7418 0.75 0 - 1.5

The k-Factor can be varied as a function of the demand to effectively change the value of current at which the steady state value of the thermal capacity used is equal to 100%. Since losses increase with increasing frequency, the current required to reach rated machine temperature is likely to be lower at high speeds. A reduced k factor at higher demand settings can be used to adjust the steady state value of thermal capacity used to account for such speed effects. Adjustment of the k factor as a function of the speed demand can also be used to account for decreased cooling effects at low speeds in cases where the cooling is diminished at low speeds. Figure " Use of a Variable k-Factor in Variable Thermal Overload Protection Function" shows an example of how to use the 20 parameters to define a k-Factor variation with the demand setting. The values of the parameters are given in Table "Values of the k-Factor Settings". Note that the programmed value at 190% demand is used at all speeds in excess of 190%.



k Factor

Speed Demand

k Factor

(%)

250200150100500

1.4

1.2

1

0.8

0.6

0.4

0.2

0

Figure 6-14 Example of Variable Parameter Thermal Overload Protection k-Factor

Table 6-14 Values of the k-Factor Settings

% Demand k-Factor0 0.710 0.820 0.930 140 150 160 170 1.0580 1.190 1.15

100 1.15110 1.1120 1.05130 1140 0.95150 0.9160 0.85170 0.8180 0.75190 0.7

See alsoAMP Data Screen (Page 160)



6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection

OverviewThe RTD function allows the use of up to 12 RTD temperature sensors to provide general overtemperature protection. A fixed temperature pickup level can be assigned to each RTD individually. RTDs can also be assigned to the Stator or Ambient groups for use in either the fixed or variable pickup thermal models. An alarm or trip response to an open or shorted RTD can be selected.

Device 49RTD provides parameter status as shown in table RTD Protection Menu - Machine Thermal Overload - Fixed Pickup RTD Protection.

Table 6-15 RTD Protection Menu - Machine Thermal Overload - Fixed Pickup RTD Protection (ID 7429)




Low Pass Time ConstLow Pass Time Constant for RTD Measurement Filtering

7430 msec 0 0 - 1000

RTD 1 MenuRTD 1 Protection Menu

7431 Sub-menu


7438 Sub-menu


7445 Sub-menu


7452 Sub-menu


7459 Sub-menu


7466 Sub-menu


7473 Sub-menu


7480 Sub-menu


7487 Sub-menu


7494 Sub-menu


7501 Sub-menu


7508 Sub-menu

Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection


RTD 1 Menu (7431)




RTD 1 Pickup LevelRTD 1 Pickup Level

7433 ● °C● °F

150 °C 0 - 572

RTD 1 Dropout LevelRTD 1 Percentage under Pickup Level for Reset

7434 % 2 0 -50

RTD 1 Pickup DelayRTD 1 Pickup Delay

7435 sec 10 0 -180

RTD 1 Dropout DelayRTD 1 Time to Reset

7436 sec 5 0 - 180


Values

RTD 1 UsageRTD 1 Bearing, Ambient, etc.

7432 None ● Ambient● Stator● Bearing● Other● None

RTD 1 Output TypeRTD 1 Output Type Alarm, Fault, etc.


RTD 1 Failure ResponseRTD 1 Response to a shorted or open RTD

7712 Alarm ● Alarm● Trip

RTD 2 Menu (7438)





7440 ● °C● °F

150 °C 0 - 572


7441 % 2 0 -50


7442 sec 10 0 -180


7443 sec 5 0 - 180




Values







RTD 3 Menu (7445)





7447 ● °C● °F

150 °C 0 - 572


7448 % 2 0 -50


7449 sec 10 0 -180


7450 sec 5 0 - 180


Values









RTD 4 Menu (7452)





7454 ● °C● °F

150 °C 0 - 572


7455 % 2 0 -50


7456 sec 10 0 -180


7457 sec 5 0 - 180


Values







RTD 5 Menu (7459)





7461 ● °C● °F

150 °C 0 - 572


7462 % 2 0 -50


7463 sec 10 0 -180


7464 sec 5 0 - 180




Values







RTD 6 Menu (7466)





7461 ● °C● °F

150 °C 0 - 572


7462 % 2 0 -50


7463 sec 10 0 -180


7464 sec 5 0 - 180


Values

RTD 6 Usage 7467 None ● Ambient● Stator● Bearing● Other● None







RTD 7 Menu (7473)





7475 ● °C● °F

150 °C 0 - 572


7476 % 2 0 -50


7477 sec 10 0 -180


7478 sec 5 0 - 180


Values






RTD 8 Menu (7480)





7482 ● °C● °F

150 °C 0 - 572


7483 % 2 0 -50


7485 sec 10 0 -180


7486 sec 5 0 - 180




Values






RTD 9 Menu (7487)





7489 ● °C● °F

150 °C 0 - 572


7490 % 2 0 -50


7491 sec 10 0 -180


7492 sec 5 0 - 180


Values








RTD 10 Menu (7494)





7496 ● °C● °F

150 °C 0 - 572


7497 % 2 0 -50


7498 sec 10 0 -180


7499 sec 5 0 - 180


Values






RTD 11 Menu (7501)





7503 ● °C● °F

150 °C 0 - 572


7504 % 2 0 -50


7505 sec 10 0 -180


7506 sec 5 0 - 180




Values







RTD 12 Menu (7508)





7510 ● °C● °F

150 °C 0 - 572


7511 % 2 0 -50


7512 sec 10 0 -180


7513 sec 5 0 - 180


Values









The maximum response time with zero delay (pickup counter = 0) is 10 milliseconds for RTDs 1 through 12 is 50 milliseconds.


RTD Status Screen (Page 164)



6.17 Device 50 - Fixed Pickup Instantaneous Overcurrent Device OverviewFixed pickup instantaneous overcurrent is used to protect the motor and connected load very quickly against operation under conditions of high current. The fixed pickup instantaneous overcurrent function provides a single instantaneous overcurrent setting that produces a trip or alarm condition when the current rises above that value. The function can be programmed to produce a trip or an alarm when any one, any two, or all three of the phase currents is above the set point. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.

NoteEncoder Loss


Device 50 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent.

Table 6-16 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent (ID 7515)


ID Units Default Value Minimum - Maximum Value

Pickup Level 7516 % 100 0 - 190Dropout Level 7518 % 2 0 - 50Low Pass Time Const 7520 msec 0 0 -1000Minimum Speed 7521 % 0 0 -100Startup Time 7522 sec 0 0 - 6000

Picklist ID Units Default Value ValuesEnable State Fixed Pickup Instantaneous Overcurrent Ena‐ble State


Phase SelectionFixed Pickup Instantaneous Overcurrent Select Phases to Monitor

7710 Any Phase ● Any Phase● Any Two Phases● All Phases


Advanced Motor Protection and RTD Protection Functions6.17 Device 50 - Fixed Pickup Instantaneous Overcurrent Device


Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

RMS Phase

Current

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >

Figure 6-15 Overcurrent Protection Diagram

Advanced Motor Protection and RTD Protection Functions6.17 Device 50 - Fixed Pickup Instantaneous Overcurrent Device


6.18 Device 51 - Fixed Inverse Time Overcurrent

6.18.1 Device 51 - Fixed Inverse Time Overcurrent

OverviewFixed pickup inverse time overcurrent is used to protect the motor and connected load against operation under conditions of high current with a trip time that is inversely related to the amount of current. The fixed pickup inverse time overcurrent function provides a single instantaneous overcurrent setting that produces a trip or alarm condition when the chosen inverse time characteristic is met. The function can be programmed to produce a trip or an alarm when any one, any two, or all three of the phase currents has met its inverse time curve. A variety of IEEE, ANSI, IEC, and IAC inverse time curves are selectable as well as a user defined curve function. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. Flux based PLL or encoder provides per unit speed (absolute value).

NoteEncoder Loss


Device 51 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Inverse Time Overcurrent.

Table 6-17 Advanced Motor Protection Menu - Fixed Pickup Inverse Time Overcurrent (ID 7533)




Time Dial Multiplier (TDM)Fixed Inverse Time Overcurrent Pickup Level Time Dial Multiplier

7534 1.0 0.01 - 600

Pickup LevelFixed Inverse Time Overcurrent Pickup Level

7536 % 100 0 - 190

Def. Time Pickup DelayFixed Inverse Time Overcurrent Pickup Delay

7517 sec 1 0 - 180

Def. Time Dropout DelayFixed Inverse Time Overcurrent Dropout Delay

7519 sec 1 0 - 180

User Programmed CurveUser Programmed Curve

7538 Sub-menu

Low Pass Time ConstFixed Inverse Time Overcurrent Low Pass Time Const

7559 msec 0 0 - 1000

Minimum Speed 7560 % 0 0 - 100Startup TimeFixed Inverse Time Overcurrent

7561 sec 0 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent



Values

Reset TypeFixed Inverse Time Overcurrent Pickup Level Reset Type

7535 Timed ● Timed● Instantaneous

Curve TypeSelect Inverse Time Overcurrent Pickup Level

7537 Definite Time ● Definite Time● IEEE Ext Inv● IEEE Very Inv● IEEE Mod Inv● ANSI Ext Inv● ANSI Norm Inv● ANSI Mod Inv● IEC Curve A● IEC Curve B● IEC Curve C● Short Inv● IAC Ext Inv● IAC Very Inv● IAC Norm Inv● IAC Short Inv● I2t● I4t● User Prog

Enable StateFixed Maximum Power Factor Enable State:


Selecting User Prog will display the User Programmed Curve Menu (7538) shown below.

User Programmed Curve Menu (7538)




0% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current

7539 sec 6000 0 - 6000


7540 sec 6000 0 - 6000


7542 sec 6000 0 - 6000







7543 sec 6000 0 - 6000


7544 sec 6000 0 - 6000


7545 sec 6000 0 - 6000


7546 sec 6000 0 - 6000


7547 sec 6000 0 - 6000


7548 sec 6000 0 - 6000


7549 sec 6000 0 - 6000


7550 sec 33.1 0 - 6000


7551 sec 27.8 0 - 6000


7552 sec 23.7 0 - 6000


7553 sec 20.4 0 - 6000


7554 sec 17.8 0 - 6000


7555 sec 15.6 0 - 6000


7556 sec 13.8 0 - 6000


7557 sec 12.3 0 - 6000







7556 sec 11.1 0 - 6000


7558 sec 0 0 - 6000

User Programmed CurveA user defined pickup and dropout time curve may be selected that allows pickup and drop out times to be entered over the range of 0 to 190% per unit current. The pickup level that is set defines the point on the curve that divides between dropout times and pickup times. Pickup and dropout times are linearly interpolated between points except for that the 190% point defines the pickup time for all values above that point. Typically, the VFD cannot measure output currents in excess of 200% and current readings will tend to saturate in the case of currents in excess of that value (this should be verified for the specific VFD in cases where protection may be affected by output current sensor saturation). The pickup or dropout time is assumed to be constant between the closest point to the pickup level and the pickup level itself. Refer to the figure below to view an example of a user programmed curve.

User Programmed OverCurrent Trip Curve

Reset Time Pickup Time

Pickup Level

RMS Current

(seconds)

Trip Time

(%)

= 115%

0 50 100 150 200

0

10

20

30

40

50

60

70

80

Figure 6-16 User Programmed OverCurrent Trip Curve Example



The table shown below contains the parameters used to generate the User Programmed OverCurrent Trip Curve Example diagram.

RMS Current (%) Trip Time (seconds)0 1010 1520 1530 1540 1550 2060 3070 4080 5090 60100 60110 60120 73130 63140 54150 47160 41170 37180 33190 29

The time dial multipler (TDM) affects the actual value of the trip time as well as the curve input data. If the TDM is set to one, then the times in the table will be obtained but the times may also be scaled with a non-unity value of the TDM setting. The reset type must also be set to "timed" for the reset values in the table to apply. With reset type set to "instantaneous", an instantaneous reset will occur when the current falls below the pickup level.

6.18.2 Function 51 IEEE Pickup and Reset

Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown for IEEE curves as shown in the following paragraphs.



IEEE CurveThe pickup time as a function of current is given by:

Figure 6-17 IEEE Pickup Curve Equation

The reset time is either zero (selectable) or given by:

T TDMdo

reset

I pu

Irms

−

−( )

τ

12

Figure 6-18 IEEE Reset Curve Equation

Table 6-18 IEEE Curve Data Table

IEEE Curve A B p τreset

Extremely Inverse 28.2 0.1217 2.000 29.1Very Inverse 19.61 0.491 2.000 21.6Moderately Inverse 0.0515 0.1140 0.02000 4.85

Each graphic below depicts the IEEE Curve for each curve type using the data given in the IEEE Curve Data Table.



stator current to pickup current ratio

trip

tim

e

(se

co

nd

s)

extremely inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

0

101

102

103

IEEE

TDM=1.0

Figure 6-19 IEEE Extremely Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)

extremely inverse reset time

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

1

102

103

IEEE

TDM=1.0

Figure 6-20 IEEE Extremely Inverse Reset Time




trip

tim

e

(se

co

nd

s)

very inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

0

101

102

IEEE

TDM=1.0

Figure 6-21 IEEE Very Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)

very inverse reset time

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

1

102

103

IEEE

TDM=1.0

Figure 6-22 IEEE Very Inverse Reset Time




trip

tim

e

(se

co

nd

s)

moderately inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

0

101

102

IEEE

TDM=1.0

Figure 6-23 IEEE Moderately Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)

moderately inverse reset time

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

0

101

102

IEEE

TDM=1.0

Figure 6-24 IEEE Moderately Inverse Reset Time

6.18.3 Function 51 ANSI Pickup and Reset

Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown for ANSI curves as shown in the following paragraphs.



ANSI CurveThe pickup time as a function of current is given by:

Figure 6-25 ANSI Pickup Curve Equation


T TDMdo

reset

I pu

Irms

−

−( )

τ

12

Figure 6-26 ANSI Reset Curve Equation

Table 6-19 ANSI Curve Data Table

ANSI Curve A B C D E τreset

Extremely Inverse(CO-11)

0.0399 0.2294 0.500 3.0094 0.7222 5.67

Very Inverse(CO-9)

0.0615 0.7989 0.3400 - 0.2840 4.0505 3.88

Inverse(CO-8)

0.0274 2.2614 0.3000 - 4.1899 9.1272 5.95

Moderately Inverse(CO-7)

0.1735 0.6791 0.8000 - 0.0800 0.1271 1.08




trip

tim

e

(se

co

nd

s)


1 1.5 2 2.5 3 3.5 4 4.5 510

-1

100

101

102

ANSI

TDM=1.0

Figure 6-27 ANSI Extremely Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)


0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

0

101

102

ANSI

TDM=1.0

Figure 6-28 ANSI Extremely Inverse Reset Time




trip

tim

e

(se

co

nd

s)

very inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 5

100

ANSI

TDM=1.0

Figure 6-29 ANSI Very Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)


0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

0

101

102

ANSI

TDM=1.0

Figure 6-30 ANSI Very Inverse Reset Time




trip

tim

e

(se

co

nd

s)

inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

-1

100

101

102

ANSI

TDM=1.0

Figure 6-31 ANSI Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)

inverse reset time

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

0

101

102

ANSI

TDM=1.0

Figure 6-32 ANSI Inverse Reset Time



trip

tim

e


(se

co

nd

s)

moderately inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 5

100

ANSI

TDM=1.0

Figure 6-33 ANSI Moderately Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)

moderately inverse reset time

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

1.5

2

2.5

3

3.5

4

4.5

5

5.5

ANSI

TDM=1.0

Figure 6-34 ANSI Moderately Inverse Reset Time

6.18.4 Function 51 IAC Pickup and Reset

Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown for IAC curves as shown in the following paragraphs.



IAC CurveThe pickup time as a function of current is given by:

Figure 6-35 IAC pickup-curve equation


T TDMdo

reset

I pu

Irms

−

−( )

τ

12

Figure 6-36 IAC Reset Curve Equation

Table 6-20 IAC Curve Data Table

IAC Curve A B C D E τreset

Extremely Inverse 0.0040 0.6379 0.6200 1.7873 0.2461 6.008Very Inverse 0.0900 0.7965 0.1000 - 1.2885 7.9586 4.678Inverse 0.2078 0.8630 0.8000 - 0.4180 0 0.990Short Inverse 0.0428 0.0609 0.6200 - 0.0010 0.0221 0.222




trip

tim

e

(se

co

nd

s)


1 1.5 2 2.5 3 3.5 4 4.5 510

-1

100

101

102

IAC

TDM=1.0

Figure 6-37 IAC Extremely Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)


0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

0

101

102

IAC

TDM=1.0

Figure 6-38 IAC Extremely Inverse Reset Time




trip

tim

e

(se

co

nd

s)

very inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 5

100

IAC

TDM=1.0

Figure 6-39 IAC Very Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)


0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

0

101

102

IAC

TDM=1.0

Figure 6-40 IAC Very Inverse Reset Time




trip

tim

e

(se

co

nd

s)

inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 5

100

TDM=1.0

IAC

Figure 6-41 IAC Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)

inverse reset time

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

1

1.5

2

2.5

3

3.5

4

4.5

5

IAC

TDM=1.0

Figure 6-42 IAC Inverse Reset Time




trip

tim

e

(se

co

nd

s)

short inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

-2

10-1

100

IAC

TDM=1.0

Figure 6-43 IAC Short Inverse Pickup Time



rese

t tim

e

(se

co

nd

s)

short inverse reset time


0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

IAC

TDM=1.0

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

Figure 6-44 IAC Short Inverse Reset Time

6.18.5 Function 51 IEC Pickup and Reset

Pickup and Reset Curve Equations Pickup time as a function of current as well as the reset time are shown for IEC curves as shown in the following paragraphs.

T TDMpu

K

I

I

rms

pu

E=

−1

Figure 6-45 IEC Pickup Curve Equation

T TDMdo

reset

I pu

Irms

−

−( )

τ

1

2

Figure 6-46 IEC Reset Curve Equation



IEC Curve K E τreset

Curve A (Inverse)

0.140 0.020 9.7

Curve B (Very Inverse)

13.500 1.000 43.2

Curve C (Extremely Inverse)

80.000 2.000 58.2

Short Inverse 0.050 0.040 0.500


trip

tim

e

(se

co

nd

s)

inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

0

101

102

IEC

TDM=1.0

Figure 6-47 IEC Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)

inverse reset time

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

0

101

102

IEC

TDM=1.0

Figure 6-48 IEC Inverse Reset Time




trip

tim

e

(se

co

nd

s)


1 1.5 2 2.5 3 3.5 4 4.5 510

0

101

102

103

IEC

TDM=1.0

Figure 6-49 IEC Extremely Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)


0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

1

102

103

IEC

TDM=1.0

Figure 6-50 IEC Extremely Inverse Reset Time




trip

tim

e

(se

co

nd

s)

short inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

-1

100

101

102

IEC

TDM=1.0

Figure 6-51 IEC Short Inverse Pickup Time



0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9


rese

t tim

e

(se

co

nd

s)

short inverse reset time

0.6

0.8

1

1.2

1.4

1.6

1.8

2

2.2

2.4

2.6

IEC

TDM=1.0

Figure 6-52 IEC Short Inverse Reset Time




trip

tim

e

(se

co

nd

s)

very inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

0

101

102

103

IEC

TDM=1.0

Figure 6-53 IEC Very Inverse Pickup Time




rese

t tim

e

(se

co

nd

s)


0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910

1

102

103

IEC

TDM=1.0

Figure 6-54 IEC Very Inverse Reset Time

6.18.6 Function 51 I2T Pickup and Reset

Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown below for I2t

Figure 6-55 I2t Pickup Time Equation



T TDMdo I

I

pu

rms

=

1002

Figure 6-56 I2t Reset Time Equation


trip

tim

e

(se

co

nd

s)

inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

0

101

102

I2

t

TDM=1.0

Figure 6-57 I2t Inverse Pickup Time



rese

t tim

e

(se

co

nd

s)

inverse reset time


100

150

200

250

300

350

400

450

500

I2

t

TDM=1.0

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

Figure 6-58 I2t Inverse Reset Time

6.18.7 Function 51 I4T Pickup and Reset

Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown for I4t curves as shown below.

I4t CurveThe pickup time as a function of current is given by:

T TDMpu

I

I

rms

pu

=

1004

Figure 6-59 I4t Pickup Time equation




T TDMdo I

I

pu

rms

=

1004

Figure 6-60 I4t Reset Time equation

Each graphic below depicts the I4t for each curve type .


trip

tim

e

(se

co

nd

s)

inverse curve

1 1.5 2 2.5 3 3.5 4 4.5 510

-1

100

101

102

I4

t

TDM=1.0

Figure 6-61 I4t Inverse Pickup



rese

t tim

e

(se

co

nd

s)

inverse reset time


I4

t

TDM=1.0

100

120

140

160

180

200

220

240

260

280

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

Figure 6-62 I4t Inverse Reset



6.19 Device 55 - Fixed Pickup Maximum Power FactorOverviewFixed pickup maximum power factor is used to protect the motor against operation under conditions of high power factor that would indicate abnormal conditions in the machine. The fixed pickup maximum power factor function provides a single maximum power factor setting that produces a trip or alarm condition when the power factor. The function can be enabled when the speed demand is above a programmable level. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.

NoteEncoder Loss


Device 55 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Maximum Power Factor

Table 6-21 Advanced Motor Protection Menu - Fixed Pickup Maximum Power Factor (ID 7573)



Pickup LevelFixed Maximum Power Factor Pickup Level

7573 0.95 0.01 - 1

Pickup DelayFixed Maximum Power Factor Pickup Delay

7574 sec 1 0 - 6000

Dropout LevelFixed Maximum Power Factor Dropout Level

7575 % 2 0 - 50

Dropout DelayFixed Maximum Power Factor Dropout Delay

7576 sec 0.1 0 - 6000

Low Pass Time ConstantFixed Maximum Power Factor Low Pass Time Constant

7577 msec 0 0 - 1000

Minimum SpeedFixed Maximum Power Factor Minimum Speed Enable Point

7578 % 10 0 - 100

Startup TimeFixed Maximum Power Factor Delay from Startup

7579 sec 5 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.19 Device 55 - Fixed Pickup Maximum Power Factor


Picklist ID Units Default Value ValuesEnable StateFixed Maximum Power Factor Enable State:



Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Power

Factor

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >

Figure 6-63 OverPF Protection Diagram

Advanced Motor Protection and RTD Protection Functions6.19 Device 55 - Fixed Pickup Maximum Power Factor


6.20 Device 55 - Power Factor Relay Device (Fixed minimum power factor)OverviewFixed pickup minimum power factor is used to protect the motor against operation under conditions of low power factor that would indicate abnormal conditions in the machine. The fixed pickup minimum power factor function provides a single minimum power factor setting that produces a trip or alarm condition when the power factor. The function can be enabled when the speed demand is above a programmable level. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.

NoteEncoder Loss


Device 55 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Minimum Power Factor.

Table 6-22 Advanced Motor Protection Menu - Fixed Pickup Minimum Power Factor (ID 7582)



Pickup LevelFixed Minimum Power Factor Pickup Level

7582 0.5 0.01 - 1

Pickup DelayFixed Minimum Power Factor Pickup Delay

7583 sec 1 0 - 6000

Dropout LevelFixed Minimum Power Factor Dropout Level

7584 % 102 100 - 200

Dropout DelayFixed Minimum Power Factor Dropout Delay

7585 sec 0.1 0 - 6000

Low Pass Time ConstantFixed Minimum Power Factor Low Pass Time Constant

7586 msec 0 0 - 1000

Minimum SpeedFixed Minimum Power Factor Minimum Speed Enable Point

7587 % 10 0 - 100

Startup TimeFixed Minimum Power Factor Delay from Startup

7588 sec 5 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.20 Device 55 - Power Factor Relay Device (Fixed minimum power factor)


Picklist ID Units Default Value ValuesEnable StateFixed Minimum Power Factor Enable State:



Pickup

Timed

Out

Dropout

Timed

Out

1 - Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Power

Factor

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ <

Figure 6-64 UnderPF Protection Diagram

Advanced Motor Protection and RTD Protection Functions6.20 Device 55 - Power Factor Relay Device (Fixed minimum power factor)


6.21 Device 59G - Fixed Pickup Instantaneous Zero Sequence Overvoltage

OverviewFixed pickup instantaneous zero sequence overvoltage is used to protect the motor very quickly under conditions of high zero sequence voltage which could be caused by high phase to ground leakage or a ground fault. The fixed pickup zero sequence overvoltage function provides a single zero sequence overvoltage setting that produces a trip or alarm condition when the zero sequence voltage rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.

Note

The zero-sequence voltage uses a per unit system based on the rated line to neutral voltage of the machine. A 100% zero sequence voltage will occur when the RMS value of the average of the three phase voltages with respect to earth ground is equal to the rated machine voltage (given as a line-to-line voltage) divided by the square root of 3.

NoteEncoder Loss


Device 59G provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Instantaneous Zero Sequence Overvoltage

Table 6-23 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Zero Sequence Overvoltage (ID 7563)




Pickup LevelFixed Pickup Instantaneous Zero Sequence Overvolt‐age Pickup Level

7564 % 5 0 - 175

Dropout LevelFixed Pickup Instantaneous Zero Sequence Overvolt‐age Dropout Level

7566 % 2 0 - 50

Dropout DelayFixed Pickup Instantaneous Zero Sequence Overvolt‐age Dropout Delay

7567 % 0.1 0 - 6000

Low Pass Time ConstFixed Pickup Instantaneous Zero Sequence Overvolt‐age Low Pass Time Constant

7568 sec 0 0 - 1000

Minimum SpeedFixed Pickup Instantaneous Zero Sequence Overvolt‐age Minimum Speed Enable Point

7569 msec 0 0 -100

Startup TimeFixed Pickup Instantaneous Zero Sequence Overvolt‐age Delay from Startup

7570 % 0 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.21 Device 59G - Fixed Pickup Instantaneous Zero Sequence Overvoltage



Values

Enable StateFixed High Frequency Rate of Change w/ Min Speed Enable Min Speed Enable Point


The maximum response time with zero delay (pickup counter = 0) is 5 ms. The maxium pickup time is zero.

Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Zero Sequence

Voltage

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >

Figure 6-65 OverZeroSeqVoltage Protection Diagram

NoteOverZeroSeqVoltage Protection Diagram

Fixed Pickup Instanteous Zero Sequence Overvoltage and fixed Pickup Definite Minimum Time Sequence Overvoltage use the same diagram. To provide clarity to the end-user, the titles are repeated so that the graph is adjacent to the text description of the function. This method of description is applied consistently throught this manual.

Advanced Motor Protection and RTD Protection Functions6.21 Device 59G - Fixed Pickup Instantaneous Zero Sequence Overvoltage


6.22 Device 59G - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage

OverviewFixed pickup definite minimum time zero sequence overvoltage is used to protect the motor against sustained operation under conditions of high zero sequence voltage which could be caused by high phase to ground leakage or a ground fault. The fixed pickup zero sequence overvoltage function provides a single zero sequence overvoltage setting that produces a trip or alarm condition when the zero sequence voltage rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.

Note

The zero-sequence voltage uses a per unit system based on the rated line to neutral voltage of the machine. A 100% zero sequence voltage will occur when the RMS value of the average of the three phase voltages with respect to earth ground is equal to the rated machine voltage (given as a line-to-line voltage) divided by the square root of 3.

NoteEncoder Loss


Device 59G provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage.

Table 6-24 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent (ID 7524)




Pickup LevelFixed Instantaneous Zero Sequence OverVolt Pick‐up Level

7525 % 100 0 - 190

Pickup DelayFixed Instantaneous Zero Sequence OverVolt Pick‐up Delay

7526 sec 0 - 1 0 - 6000

Dropout LevelFixed Instantaneous Zero Sequence OverVolt Dropout Level

7527 % 2 0 - 50

Dropout DelayFixed Instantaneous Zero Sequence OverVolt Dropout Delay

7528 sec 0 - 1 0 - 6000

Low Pass Time ConstFixed Instantaneous Zero Sequence OverVolt Low Pass Time Const

7529 msec 0 0 -1000

Advanced Motor Protection and RTD Protection Functions6.22 Device 59G - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage





Minimum SpeedFixed Instantaneous Zero Sequence OverVolt Ena‐ble State

7530 % 0 0 -100

Startup TimeFixed Instantaneous Zero Sequence OverVolt De‐lay from Startup

7531 sec 0 0 - 6000


Values

Enable State Fixed Pickup Instantaneous Zero Sequence Over‐Volt Enable State


The maximum response time with zero delay (pickup counter = 0) is 10 ms. The maximum pickup time is zero.

Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Zero Sequence

Voltage

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >



Figure 6-66 OverZeroSeqVoltage Protection Diagram

NoteOverZeroSeqVoltage Protection Diagram

Fixed Pickup Instanteous Zero Sequence Overvoltage and fixed Pickup Definite Minimum Time Sequence Overvoltage use the same diagram. To provide clarity to the end-user, the titles are repeated so that the graph is adjacent to the text description of the function. This method of description is applied consistently throught this manual.



6.23 Device 66 - Notching or Jogging Device - Starts per HourOverviewThe starts per hour function is used to enforce a minimum time between starts of the machine. A programmable minimum time since last start can be set. A start attempt prior to the expiration of the minimum time can be programmed to trip, alarm, or block start.

NoteThe Protection Systems Engineer must ensure that either the fixed or variable Thermal Model protection parameters are properly set.

A thermal model is required for hot starts, cold starts, and minimum thermal capacity to run. It is not possible to use these functions without a thermal model. The software is arranged to automatically enable the fixed thermal model once one the three functions is enabled. That is, the thermal model cannot be disabled as long as the hot starts, cold starts, or minimum thermal capacity functions are enabled.

If the thermal model is not configured properly, the system will not be protected as intended.

Device 66 provides parameter status as shown in table Advanced Motor Protection Menu - Starts per Hour.

Table 6-25 Advanced Motor Protection Menu - Starts per Hour (ID 7590)




Min Time Since StartMinimum Starting Interval (Wait Period between Starts)

7591 sec 60 0 - 18000


Values

Enable StateMinimum Starting Interval Enable


The maximum response time with zero delay (pickup counter = 0) is 50 milliseconds.

Advanced Motor Protection and RTD Protection Functions6.23 Device 66 - Notching or Jogging Device - Starts per Hour


6.24 Device 66 - Notching or Jogging Device - Cold Starts per HourOverviewThe cold starts per hour function is used to enforce a maximum number of cold starts of the machine over an adjustable time period. An attempt to cold start the machine in excess of the allowable number can be programmed to trip, alarm, or block start. A cold start is defined as a start that occurs when the thermal capacity used is below an adjustable value




Device 66 provides parameter status as shown in table Advanced Motor Protection Menu - Notching or Jogging - Cold Starts per Hour.

Table 6-26 Advanced Motor Protection Menu - Notching or Jogging - Cold Starts per Hour (ID 7593)




% Thermal Capacity used to define a Cold StartMax Cold Starts per Hour

7594 % 5 0 - 100

Max Cold StartsMaximum Number of Cold Starts per the time interval

7595 2 0 - 16

Time IntervalTime Interval

7596 sec 3600 0 - 18000


Values

Enable StateMax Cold Starts per Hour Enable State

7597 Disabled ● Disabled● Alarm● Latched Alarm● Trip


Advanced Motor Protection and RTD Protection Functions6.24 Device 66 - Notching or Jogging Device - Cold Starts per Hour


6.25 Device 66 - Notching or Jogging Device - Hot Starts per HourOverviewThe hot starts per hour function is used to enforce a maximum number of hot starts of the machine over an adjustable time period. An attempt to hot start the machine in excess of the allowable number can be programmed to trip, alarm, or block start. A hot start can be defined as any start or a start that occurs when the thermal capacity used is above the adjustable value used by the cold starts per hour function.




Device 66 provides parameter status as shown in table Advanced Motor Protection Menu - Hot Starts per Hour

Table 6-27 Advanced Motor Protection Menu - Hot Starts per Hour (ID 7598)



% Thermal Capacity used to define Hot StartMax Hot Starts per hour

7599 % 5 0 - 100

Max Hot StartsMaximum Number of Hot Starts per the time interval

7600 2 0 - 16

Time IntervalTime Interval

7601 sec 3600 0 - 18000

Picklist ID Units Default Value ValuesEnable StateMax Hot Starts per Hour Enable State



Advanced Motor Protection and RTD Protection Functions6.25 Device 66 - Notching or Jogging Device - Hot Starts per Hour


6.26 Device 66 - Notching or Jogging Device - Maximum Thermal Capacity Used to Start

OverviewThe maximum thermal capacity used to start function is used to ensure that the machine has sufficient thermal capacity available to allow a start. An attempt to start the machine without sufficient thermal capacity available can be programmed to trip, alarm, or block start. The maximum amount of thermal capacity used when a start is no longer allowed is an adjustable parameter.




Device 66 provides parameter status as shown in table Advanced Motor Protection Menu - Notching or Jogging - Maximum Thermal Capacity Used to Start

Table 6-28 Motor Protection Menu - Maximum Thermal Capacity Used to Start (ID 7603)




Max Therm Cap AllowedMaximum Thermal Capacity allowed for start

7604 % 80 0 - 100


Values

Enable StateMaximum Thermal Capacity Used to Start Enable

7605 Disabled ● Disabled● Alarm● Latched/Alarm● Trip● Block Start


Advanced Motor Protection and RTD Protection Functions6.26 Device 66 - Notching or Jogging Device - Maximum Thermal Capacity Used to Start


6.27 Device 81 - Fixed Pickup OverfrequencyOverviewFixed pickup overfrequency is used to protect the motor and connected load against sustained operation under conditions of higher than desired frequency. The fixed pickup overfrequency function provides a single overfrequency setting that produces a trip or alarm condition when the frequency rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function will remain enabled until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss

Depending upon the value of parameter 1320 (encoder loss response), the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.

Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Overfrequency

Note

Over-frequency is enabled by a minimum speed or by a starting time, both of which can be set to zero. If set to zero, the function is enabled on start-up.

Table 6-29 Advanced Motor Protection Menu - Fixed Pickup Overfrequency (ID 7606)




Pickup LevelFixed Pickup Overfrequency Pickup Level

7607 % 110 0 - 250

Pickup DelayFixed Pickup Overfrequency Pickup Delay

7608 sec 1 0 - 6000

Pickup DelayFixed Pickup Overfrequency Pickup Delay

7609 % 2 0 - 50

Dropout DelayFixed Pickup Overfrequency Dropout Delay

7610 sec 0.1 0 - 6000

Low Pass Time ConstantFixed Pickup Overfrequency Low Pass Time Con‐stant

7611 msec 0 0 - 1000

Minimum Speed 7612 % 0 0 - 100Startup TimeFixed Pickup Overfrequency Delay from Startup

7613 sec 5 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.27 Device 81 - Fixed Pickup Overfrequency




Enable StateFixed Pickup Overfrequency Enable State

7614 Disabled ● Disabled● Trip● Alarm● Latched Alarm

The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Fixed Over Frequency is mutually exclusive with Variable Over Frequency.

Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Frequency

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >

Figure 6-67 OverFrequency Protection Diagram

NoteOverfrequency Protection Diagram

Fixed Pickup Overfrequency and Variable Pickup Overfrequency use the same diagram. To provide clarity to the end-user, the titles are repeated so that the graph is adjacent to the text description of the function. This method of description is applied consistently throught this manual.

Advanced Motor Protection and RTD Protection Functions6.27 Device 81 - Fixed Pickup Overfrequency


6.28 Device 81 - Variable Pickup OverfrequencyOverviewVariable pickup overfrequency is used to protect the motor and connected load against operation at higher frequencies than desired or to detect conditions under which the motor frequency has risen above the desired setpoint due to problems with load regeneration or other difficulties in the machine or load. The variable pickup overfrequency function provides a curve of overfrequency points as a function of the commanded motor speed. A trip or alarm condition occurs when that frequency rises above the curve at a given speed setting. The function offers an enable that latches once a programmable minimum speed has been reached. The function will remain enabled until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Overfrequency.

Note

Over-frequency is enabled by a minimum speed or by a starting time, both of which can be set to zero. If set to zero, the function is enabled on start-up.

Table 6-30 Advanced Motor Protection Menu - Variable Pickup Overfrequency (ID 7615)




Variable Over Frequency CurveVar Over Freq Curve

7616 Sub-menu

Pickup DelayVariable Over Frequency w/ Min Speed Enable Pickup Delay

7637 sec 1 0 - 6000

Dropout LevelVariable Over Frequency w/ Min Speed Enable Drop‐out Level

7638 % 2 0 - 50

Dropout DelayVariable Over Frequency w/ Min Speed Enable Drop‐out Delay

7639 sec 0.1 0 - 6000

Low Pass Time ConstantVariable Over Frequency w/ Min Speed Enable Low Pass Time Constant

7640 msec 0 0 - 1000

Advanced Motor Protection and RTD Protection Functions6.28 Device 81 - Variable Pickup Overfrequency





Minimum SpeedVariable Over Frequency w/ Min Speed Enable Point

7641 % 0 0 - 100

Minimum Speed ResetVariable Over Frequency w/ Min Speed Enable Speed Reset Point

7642 % 10 0 - 100

Startup TimeVariable Over Frequency w/ Min Speed Enable from Startup

7643 5 0 - 6000


Values

Enable StateVariable Over Frequency Enable State


Advanced Motor Protection Menu - Variable Overfrequency Curve Menu (ID 7616)




0% Speed PickupDefine Pickup Level in % of Rated Hz at 0% Demanded Speed

7617 % 10 0 - 250

10% Speed PickupDefine Pickup Level in %of Rated Hz at at 10% Deman‐ded Speed

7618 % 20 0 - 250

20% Speed PickupDefine Pickup Level in % of Rated Hz at at 20% Deman‐ded Speed

7619 % 30 0 - 250


7620 % 40 0 - 250


7621 % 50 0 - 250


7622 % 60 0 - 250


7623 % 70 0 - 250


7624 % 80 0 - 250







7625 % 90 0 - 250


7626 % 100 0 - 250

100% Speed PickupDefine Pickup Level in % of Rated Hz at at 100% De‐manded Speed

7627 % 110 0 - 250


7628 % 120 0 - 250


7629 % 130 0 - 250


7630 % 140 0 - 250


7631 % 150 0 - 250


7632 % 160 0 - 250


7633 % 170 0 - 250


7634 % 180 0 - 250


7635 % 190 0 - 250


7636 % 200 0 - 250

The maximum response time with zero delay (pickup counter=0) is 20 milliseconds.. Variable Over Frequency is mutually exclusive with Fixed Over Frequency.



Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Frequency

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >

Figure 6-68 Overfrequency Protection Diagram

NoteOverfrequency Protection Diagram

Fixed Pickup Overfrequency and Variable Pickup Overfrequency use the same diagram. To provide clarity to the end-user, the titles are repeated so that the graph is adjacent to the text description of the function. This method of description is applied consistently throught this manual.



6.29 Device 81 - Fixed Pickup UnderfrequencyFixed pickup underfrequency is used to protect the motor and connected load against sustained operation under conditions of lower than desired frequency. The fixed pickup underfrequency function provides a single underfrequency setting that produces a trip or alarm condition when the frequency falls below that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.reached. The function will remain enabled until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.

NoteEncoder Loss


Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Overfrequency.

Table 6-31 Advanced Motor Protection Menu - Fixed Pickup Underfrequency (ID 7645)




Pickup LevelFixed Pickup Underfrequency Pickup Level

7546 % 5 200

Pickup DelayFixed Pickup Underfrequency Pickup Delay

7647 sec 1 0 - 6000

Dropout LevelFixed Pickup Underfrequency Dropout Level

7648 % 102 100 - 200

Dropout DelayFixed Pickup Underfrequency Dropout Delay

7649 sec 0.1 0 - 6000

Low Pass Time ConstantFixed Pickup Underfrequency Low Pass Time Con‐stant

7650 msec 0 0 - 1000

Minimum SpeedFixed Pickup Underfrequency Minimum Speed En‐able Point

7651 % 20 0 - 100

Startup TimeFixed Pickup Underfrequency Delay from Startup

7652 sec 5 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.29 Device 81 - Fixed Pickup Underfrequency



Values

Enable StateFixed Pickup Underfrequency Enable State


The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Fixed Pickup Underfrequency is mutually exclusive with the Variable Pickup Underfrequency.

Pickup

Timed

Out

Dropout

Timed

Out

1 - Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Frequency

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ <

Figure 6-69 UnderFrequency Protection Diagram

Advanced Motor Protection and RTD Protection Functions6.29 Device 81 - Fixed Pickup Underfrequency


6.30 Device 81 - Variable Pickup UnderfrequencyOverviewVariable pickup underfrequency is used to protect the motor and connected load against operation at lower frequencies than desired or to detect conditions under which the motor frequency has fallen below the desired setpoint due to problems with excessive load torque or other difficulties in the machine or load. The variable pickup underfrequency function provides a curve of underfrequency points as a function of the commanded motor speed. A trip or alarm condition occurs when that frequency falls below the curve at a given speed setting. The function offers an enable that latches once a programmable minimum speed has been reached. The function will remain enabled until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. A flux based phase-lock-loop (PLL) or encoder provides the per unit speed (absolute value) input measurement data. The default is PLL.

NoteEncoder Loss


Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Underfrequency.

Table 6-32 Advanced Motor Protection Menu - Variable Pickup Underfrequency (ID 7654)




Variable Under Frequency CurveVar Under Freq Curve

7655 Sub-menu

Pickup DelayVariable Pickup Underfrequency Pickup Delay

7676 sec 1 0 - 6000

Dropout LevelVariable Over Frequency Dropout Level

7677 % 102 100 - 200

Dropout DelayVariable Pickup Underfrequency Dropout Delay

7678 sec 0.1 0 - 6000

Low Pass Time ConstantVariable Pickup Underfrequency Low Pass Time Con‐stant

7679 msec 0 0 - 1000

Minimum SpeedVariable Pickup Underfrequency Minimum Speed Ena‐ble Point

7680 % 20 0 - 100

Minimum Speed ResetVariable Pickup Underfrequency Enable Speed Reset Point

7681 % 10 0 - 100

Startup Time 7682 sec 5 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.30 Device 81 - Variable Pickup Underfrequency



Values

Enable StateVariable Pickup Underfrequency Enable State


Variable Underfrequency Curve Menu (7655)




0% Speed PickupDefine Pickup Level in % of Rated Hz at 0% Deman‐ded Speed

7656 % -1 0 - 250

10% Speed PickupDefine Pickup Level in %of Rated Hz at at 10% De‐manded Speed

7657 % 0 0 - 250


7658 % 10 0 - 250


7659 % 20 0 - 250


7660 % 30 0 - 250


7661 % 40 0 - 250


7662 % 50 0 - 250


7663 % 60 0 - 250


7664 % 70 0 - 250


7665 % 80 0 - 250


7666 % 90 0 - 250







7667 % 100 0 - 250


7668 % 110 0 - 250


7669 % 120 0 - 250


7670 % 130 0 - 250


7671 % 140 0 - 250


7672 % 150 0 - 250


7673 % 160 0 - 250


7674 % 170 0 - 250


7675 % 180 0 - 250

The maximum response time with zero delay (pickup counter = 0) is 20 milliseconds. Variable Pickup Underfrequency is mutually exclusive with the Fixed Pickup Underfrequency.



Pickup

Timed

Out

Dropout

Timed

Out

1 - Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Motor Frequency

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ <

Figure 6-70 Underfrequency Protection Diagram



6.31 Device 81 - Fixed Pickup High Frequency Rate of ChangeOverviewFixed pickup high frequency rate of change is used to protect the motor and connected load against fast changing frequencies or high rates of acceleration. The fixed pickup high frequency rate-of-change function provides a single frequency rate of change setting that produces a trip or an alarm condition when the rate-of-change of frequency rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder. The default is PLL.

NoteEncoder Loss

Depending upon the value of parameter 1320 (encoder loss response),when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.

Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup High Frequency Rate of Change.

Table 6-33 Advanced Motor Protection Menu - Fixed Pickup High Frequency Rate of Change (ID 7684)




Pickup LevelFixed High Frequency Rate of Change Pickup Level max % per second change

7685 % 10 0 - 200

Pickup DelayFixed High Frequency Rate of Change Pickup Delay

7686 sec 1 0 - 6000

Dropout LevelFixed High Frequency Rate of Change Dropout Level

7687 % 2 100 - 200

Dropout DelayFixed High Frequency Rate of Change Dropout De‐lay

7688 sec 0.1 0 - 6000

Low Pass Time ConstantFixed High Frequency Rate of Change Low Pass Time Constant

7689 msec 0 0 - 1000

Minimum SpeedFixed Under Frequency Enable Point

7690 % 20 0 - 100

Startup TimeFixed High Frequency Rate of Change Delay from Startup

7691 sec 5 0 - 6000

Advanced Motor Protection and RTD Protection Functions6.31 Device 81 - Fixed Pickup High Frequency Rate of Change



Values

Enable StateFixed High Frequency Rate of Change Min Speed Enable State

7692 Disabled ● Disabled● Alarm● LatchedAlalrm● Trip


Pickup

Timed

Out

Dropout

Timed

Out

Dropout

Level

Output

Latching

Control

1 = Latched

Time

Constant

Reset

Low Pass

Filter Reset

Reset

Trip or

Alarm

Output

Zero

Count

Enable

Zero

Output

Dropout

Time Delay

Pickup

Time Delay

Output

Count

Enable

Dropout

Time Delay

(Counter)

Pickup

Time Delay

(Counter)

Time

Constant

1 = Enable

0 = Disable

1 = pickup

0 = dropout

Rate of Change of

Motor Frequency

Pickup

Level

Low Pass

Filter

>=

>=

+

-

Σ >

Figure 6-71 OverFrequencyRate Protection

Advanced Motor Protection and RTD Protection Functions6.31 Device 81 - Fixed Pickup High Frequency Rate of Change


6.32 Changing RTD Type

6.32.1 Changing RTD TypeThe Advanced Motor Protection, can be set up for a wide variety of RTD types. However, it is set up at the factory for the desired RTD type. It is NOT field adjustable. If a type change in RTD type is needed, please contact Siemens support.at 1 800 333 7421.

NOTICE

Specify RTD Type at Time of Manufacture

The AMP is configured to use PT-100 Type RTDs at time of manufacture by default.

Advanced Motor Protection and RTD Protection Functions6.32 Changing RTD Type


Advanced Motor Protection and RTD Protection Functions6.32 Changing RTD Type


Alarms, Faults, and Logging Messages 77.1 Alarms, Faults, and Logging Messages

The AMP function displays "AMP General Alarm" when an AMP function that is enabled as either Alarm, Latched Alarm, or Block Start and has an active output. The function displays "AMP General Fault" in the event that a function that is enabled as TRIP and has an active output.

The "AMP General Alarm" and "AMP General Fault" do not describe the specific AMP function that triggered the output. To view the specific function that triggered this alarm or fault, one must either consult the Debug Screens "AMP Alarms/Faults" and "AMP Data", or the Event Log.

The Event Log displays which specific AMP function triggered the active General Alarm or General Fault along with the exact time at which the event occurred. Siemens recommends using the Event Log data as a diagnostic tool when investigating the cause of displayed messages.

The following table contains the AMP functions and their associated Event Log Messages that could trigger the AMP Alarm or Fault.

Note

All function outputs are visible at the networkms through manual IDs.

Table 7-1 Advanced Motor Protection Function Event Log Table

Function Name Menu ID Event Log Message1

Fixed UnderSpeed 7217 Alarm: Fixed Under SpeedFault: Under Speed

Variable UnderSpeed 7226 Alarm: Variable Under SpeedFault: Variable Under Speed

Fixed OverSpeed 7181 Alarm: Fixed Over SpeedFault: Fixed Over Speed

Variable OverSpeed 7189 Alarm: Variable Over SpeedFault: Variable Over Speed

Fixed UnderCurrent 7256 (3 Phase) Alarm: Fixed Under Current RMSAFault: Fixed Under Current RMSAAlarm: Fixed Under Current RMSBFault: Fixed Under Current RMSBAlarm: Fixed Under Current RMSCFault: Fixed Under Current RMSC



Variable UnderCurrent 7266 (3 Phase) Alarm: Variable Under Current RMSAFault: Variable Under Current RMSAAlarm: Variable Under Current RMSBFault: Variable Under Current RMSBAlarm: Variable Under Current RMSCFault: Variable Under Current RMSC

Fixed Under Power 7297 Alarm: Fixed Under PowerFault: Fixed Under Power

Fixed Torque Pulsation 7306 Alarm: Fixed Torque PulsationFault: Fixed Torque Pulsation

Fixed Negative Se‐quence OverCurrent

7316 Alarm: Fixed Negative Sequence Over CurrentFault: Fixed Negative Sequence Over Current

Maximum Start Time 7325 Alarm: Maximum Start TimeFault: Maximum Start Time

Maximum Stop Time 7330 Alarm: Maximum Stop TimeFault: Maximum Stop Time

Fixed Thermal Overload 7335 Alarm: Fixed Thermal Overload 1Fault: Fixed Thermal Overload 1 Alarm: Fixed Thermal Overload 2Fault: Fixed Thermal Overload 2Note: If Configured for Block Start Enable State, Log Message displayed is:AMP Fixed Thermal Overload Block Start

Variable Thermal Over‐load

7352

Alarm: Variable Thermal Overload 1Fault: Variable Thermal Overload 1 Alarm: Variable Thermal Overload 2Fault: Variable Thermal Overload 2Note: If Configured for Block Start Enable State, Log Message displayed is:AMP Variable Thermal Overload Block Start

Fixed Instantaneous OverCurrent

7515 (3 Phases)

Alarm: Fixed Instantaneous Over Current RMSAFault: Fixed Instantaneous Over Current RMSAAlarm: Fixed Instantaneous Over Current RMSBFault: Fixed Instantaneous Over Current RMSBAlarm: Fixed Instantaneous Over Current RMSCFault: Fixed Instantaneous Over Current RMSC

Inverse Time OverCurrent 7533 (3 Phases) Alarm: Inverse Time Over Current Current RMSAFault: Inverse Time Over Current RMSAAlarm: Inverse Time Over Current Current RMSAFault: Inverse Time Over Current RMSAAlarm: Inverse Time Over Current Current RMSAFault: Inverse Time Over Current RMSA

Fixed Zero Sequence Over Voltage

7524 Alarm: Fixed Zero Sequence Over VoltageFault: Fixed Zero Sequence Over Voltage

Alarms, Faults, and Logging Messages7.1 Alarms, Faults, and Logging Messages



Fixed Instantaneous Zero Sequence Over Voltage

7563 Alarm: Fixed Instantaneous Zero Sequence Over VoltageFault: Fixed Instantaneous Zero Sequence Over Voltage

Fixed Maximum Power Factor

7572 Alarm: Fixed Maximum Power FactorFault: Fixed Maximum Power Factor

Fixed Minimum Power Factor

7581 Alarm: Fixed Minimum Power FactorFault: Fixed Minimum Power Factor

Fixed Over Frequency 7606 Alarm: Fixed Over FrequencyFault: Fixed Over Frequency

Variable Over Frequency 7615 Alarm: Variable Over FrequencyFault: Variable Over Frequency

Fixed Under Frequency 7645 Alarm: Fixed Under FrequencyFault: Fixed Under Frequency

Variable Under Frequen‐cy

7654 Alarm: Variable Under FrequencyFault: Variable Under Frequency

Fixed High Frequency Rate of Change

7684 Alarm: Fixed High Frequency Rate of ChangeFault: Fixed High Frequency Rate of Change

Minimum Thermal Ca‐pacity to Start

7603 Alarm: Minimum Thermal Capacity to StartFault: Minimum Thermal Capacity to StartNote: If Configured for Block Start Enable State, Log Message displayed is:AMP Thermal Bockstart

Maximum Number of Cold Starts

7593 Alarm: Maximum Number of Cold StartsFault: Maximum Number of Cold StartsNote: If Configured for Block Start Enable State, Log Message displayed is:AMP Max Hot Start Bockstart

Maximum Number of Hot Starts

7598 Alarm: Maximum Number of Hot StartsFault: Maximum Number of Hot StartsNote: If Configured for Block Start Enable State, Log Message displayed is:AMP Max Hot Start Bockstart

Minimum Time Between Starts

7590 Alarm: Minimum Time Between StartsFault: Minimum Time Between StartsNote: If Configured for Block Start Enable State, Log Message displayed is:AMP Starting Time Interval Blockstart

1 Display will show either Alarm or Fault depending upon configuration



Displayed Event Log MessageIn the following table the text shown between brackets, "<#>", is replaced with the RTD number (1 through 12) associated with the event. For example, if RTD 1 exceeded its temperature setpoint and was enabled as an alarm, the event log message would display "RTD Alarm: RTD 1 OT".

Table 7-2 RTD Protection Function Event Log Table

Function Name Menu ID Displayed Event Log Message1

RTD Protection 7429 (12 RTDs) Alarm: RTD <#> OT : RTD <1> OT : RTD <2> OT : RTD <3> OT through :RTD <12> OTFault: RTD <#> OT : RTD <1> OT : RTD <2> OT : RTD <3> OT through : RTD <12> OTNote: OT = Over Temperature

Alarm: RTD <#> Shrt : RTD <1> Shrt : RTD <2> Shrt : RTD <3> Shrt through : RTD <12> ShrtFault: RTD <#> Shrt : RTD <1> Shrt : RTD <2> Shrt : RTD <3> Shrt through : RTD <12> ShrtNote: Shrt = Short



Function Name Menu ID Displayed Event Log Message1

Alarm: RTD <#> Open : RTD <1> Open : RTD <2> Open : RTD <3> Open through :RTD <12> OpenFault: RTD <#> Open : RTD <1> Open : RTD <2> Open : RTD <3> Open through : RTD <12> Open

AMP RTD Communications Lost AMP RTD Block Start

See alsoAMP Alarms / Faults (Page 161)





NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens 88.1 Viewing Protection Variables

Selecting Menu Display Protection VariablesThe display parameters menu (8000) contains the pick lists to select the variable to be displayed on the front panel default display.

Selecting this menu provides the user to view / set parameters to be displayed.

(m e nu )( 8 0 0 0 )

Figure 8-1 Display Parameters

After selecting the Display Parameters menu as shown above, scroll using the arrow to select one of the following picklist variable parameters to display.

Picklist Variable Displayed Description UnitIMRF Mag current ref (A)ITRF Trq current ref (A)FLDS Flux DS (%)FLQS Flux QS (%)VDRF Vds reference (%)VQRF Vqs reference (%)SLIP Slip frequency (%)

%SPD Motor speed (%)FREQ Output Frequency (Hz)RPM Motor speed (RPM)VLTS Motor voltage (V)IMAG Mag current filtered (A)ITRQ Trq current filtered (A)ITOT Motor current (A)

%TRQ Torque out (%)KWO Output power (KW)RESS Stator resistance (%)DEMD Speed demand (%)SREF Speed reference (%)FDMD Raw flux demand (%)


Picklist Variable Displayed Description UnitFXRF Flux reference (%) (%)IDIN Id input current (A)IQIN Iq input current (A)IAIN Phase A input current (A)IBIN Phase B input current (A)ICIN Phase C input current (A)IAVI Total input current (A)VAIN Phase A input voltage (V)VBIN Phase B input voltage (V)VCIN Phase C input voltage (V)VZSQ Zero sequence voltage (V)

The additional screens as discussed in the following paragraphs provide the user with the ability to view protection variables. These screens are:

● AMP Data Screen

● AMP Alarms / Faults Screen

● RTD Status Screen

8.1.1 AMP Data Screen

AMP DataThe AMP Data screen displays data points associated with the AMP functions. The upper half of this screen shows values that are used as inputs to the various protection functions.

The lower portion of this screen contains several function outputs not seen on the AMP Faults / Alarms screen as described in another section of this chapter. The lower portion of the display screen also displays temperatures from RTDs that are used in algorithms associated with the Thermal Overload function (Hottest Ambient RTD, Hottest Stator RTD).

NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens8.1 Viewing Protection Variables


Figure 8-2 AMP Data Screen

See alsoAMP Alarms / Faults (Page 161)

Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection (Page 70)

Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload (Page 63)

8.1.2 AMP Alarms / Faults

Alarms / Fault ScreenThe AMP Alarms/Faults screen displays the Boolean value of each individual AMP function output. This screen can be used to evaluate which function activated the AMP General Alarm or AMP General Fault.



Figure 8-3 AMP Alarms / Faults Screen

Understanding the AMP / Faults Screen Using the screen capture shown in the AMP Alarms / Faults Screen, it can be seen that the Phase A, Phase B, and Phase C Instantaneous Over Current all show a 0 bit status. Refer to the NXGpro Communications Manual, version AC or higher and open the Appendix "Output Data IDs". The Instantaneous Over Current Data ID 2023 shows that the point description for each phase overcurrent A, B, C corresponds to bit fields 11, 12, 13 respectively. If a "1" instead of "0" displays, that would mean that a fault or alarm (depending on configuration) has occurred. An capture of one of the pages in this Output ID appendix is provided below for additional clarification.



Figure 8-4 Output Data IDs




8.1.3 RTD Status Screen

RTD StatusThe RTD Status Screen displays the status and temperature of all RTD inputs. The RTD status may be displayed as OK, Short, Open, or Disable.

Referring to the RTD Status Screen shown below, it can be seen that RTD1 (RT1) displays a status of OK. This means that the RTD1 is enabled, and neither shorted, nor opened. Viewing the lower portion of the status screen, it can be seen that RTD1 shows a valid temperature of 94.2 °C . The remaining RTDs in the status screen display a status of Disable.

Looking at the lower portion of the screen, it can be seen all but the valid RTD have a temperature value of 3276 °C. This is a purposely programmed value to show that the RTD does not have an OK status. In this screen, the status of those RTDs with invalid temperature show a Disable status. Other valid status for invalid temperature display may be Short, Open, or Disable.

Figure 8-5 RTD Status Screen

See alsoDevice 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection (Page 70)



Troubleshooting 99.1 Troubleshooting

Should the AMP menu not display properly, ensure that the PLC is correctly installed. The protection engineer responsible for the initial programming should be able to correct this problem.

If this issue persists, contact Siemens Support. This information is contained in the Service and Support chapter of this manual.

NoteThe PLC is a ‘key’ to unlock the AMP and RTD functions in the VFD control.● Should the AMP menu not display properly on the PLC, please check for loose connections

to the PLC and verify that the internal IP address of the VFD is set to 172.17.20.16 (Parameter #9310).

● The PLC contains an encrypted passcode. The passcode only gives access to the PLC software in the VFD control. This passcode is not required to program the protection functions of the motor that AMP provides.

● If a PLC issue persists, please contact Siemens Support. This information is contained in the Service and Support chapter of this manual.


Troubleshooting9.1 Troubleshooting


Spare Parts Data 1010.1 AMP Replaceable Spart Parts List

Part Number MLFB DescriptionA5E33854477 6ES72315PD320XB0 4 CH AIA5E33854924 6ES72315PF320XB0 8 CH AIA5E35553741 6EP13315BA10 Power SupplyA5E30574338 6GK72771AA100AA0 Network Switch

The links below provide the technical specification data for the Advanced Motor Protection Relay.

https://mall.industry.siemens.com/mall/en/us/Catalog/Search/?searchTerm=6ES72121AE400XB0

https://mall.industry.siemens.com/mall/en/us/Catalog/Search/?searchTerm=6ES72315PD320XB0

https://mall.industry.siemens.com/mall/en/us/Catalog/Search/?searchTerm=6EP13315BA10

https://mall.industry.siemens.com/mall/en/us/Catalog/Search/?searchTerm=6GK2771AA100110


Spare Parts Data 10.1 AMP Replaceable Spart Parts List


Appendix AA.1 IEEE Device Numbers and Functions

IEEE device numbers and functions Each standard device number, its definition and its functions are based on a system adopted as standard for automatic switchgear by IEEE, and incorporated in American Standard C37.2 - (1979). The table provides the definition of only those functions used in motor relay protection for Sinamics GH180 Medium Voltage Variable Frequency Drives.

Device Number

Definition and Function

12 Overspeed device is usually a direct-connected speed switch that functions on machine overspeed.14 Underspeed device functions when the speed of a machine falls below a pre-determined value.37 Undercurrent or underpower relay functions when the current or power flow decreases below a predetermined

value.38 Bearing protective device functions on excessive bearing temperature or on other abnormal mechanical con‐

ditions associated with the bearing, such a s undue wear, which may eventually result in excessive bearing temperature or failure.

46 Reverse-phase or phase-balance current relay is a relay that functions when the polyphase currents are of reverse phase sequence or when the polyphase currents are unbalanced or contain negative phase-sequence components above a given amount.

48 Incomplete sequence relay is a relay that generally returns the equipment to the normal, or off, position and locks it out if the normal starting, operating, or stopping sequence is not properly completed within a prede‐termined time. If the device is used for alarm purposes only, it should preferably be designated as 48A alarm.

49 Machine or transformer thermal relay is a relay that functions when the temperature of a machine armature winding or other load carry winding or element of a machine or power transformer exceeds a predetermined value.

50 Instantaneous overcurrent relay is a relay that functions instantaneously on an excessive value of current.51 AC time overcurrent relay is a relay with either a definite or inverse time characteristic that functions when the

ac input current exceeds a predetermined value, and in which the input current and operating time are inde‐pendently related or inversely related through a substantial portion of the performance range.

55 Power factor relay is a relay that operates when the power factor in an ac circuit rises above or falls below a predetermined value.

66 Notching or jogging device functions to allow only a specified number of operations of a given device or equipment, or a specified number of successive operations within a given time of each other. It is also a device that functions to energize a circuit periodically or for fractions of specified time intervals, or that is used to permit intermittent acceleration or jogging of a machine at low speeds for mechanical positioning,

81 Frequency relay is a relay that responds to the frequency of an electrical quantity, operating when the frequency or rate of change of frequency exceeds or is less than a predetermind value.

Separate descriptive tables as configured for the devices used in Motor Protection for SINAMICS GH180 Medium Voltage Variable Frequency Drives are provided in the sections that follow.


See alsoStandard Protections Block Diagram (Page 17)

AppendixA.1 IEEE Device Numbers and Functions


A.2 AbbreviationsThe following table provides a listing of acronyms / abbreviations used in the manual along with its full nomenclature.

Acronym / Ab‐breviation

Full Phrase

AMP Advanced Motor ProtectionCT Current TransformerDCS Distributed Control SystemDOL Direct-On-LineHMI Human-Machine InterfaceHz HertzMPR Motor Protection RelayPT Potential TransformerRMS Root Mean SquareRTD Resistance Temperature DetectorsVFD Variable Frequency Drive

AppendixA.2 Abbreviations


AppendixA.2 Abbreviations


Service and support 1111.1 Field Service Operation

Siemens can provide trained and certified field service representatives to provide technical guidance and assistance for the installation, startup/commissioning, repair and maintenance of Siemens SINAMICS Perfect Harmony™ GH180 VFD equipment and systems. Contact your regional service call center or sales office for details.

For all regional information, use the following link: www.siemens.com/yourcontact

Siemens service call centers can be reached at the regional locations listed below.

DANGER

Untrained personnel performing work on equipment may cause personal injury, death, equipment damage, VFD operational integrity

Ensure that only personnel trained by Siemens work on the equipment.

Certain components described in this documentation may be replaced or repaired only by personnel trained by Siemens.

Work incorrectly performed on the drive can result in damage to the equipment, degrade VFD operational integrity, and possibly cause physical injury to personnel or even death.

Siemens accepts no liability for any damage that occurs because these instructions have not been observed, e.g. if an untrained person carries out a repair or replaces components.

Technical Support (Hotline) ● For emergency service or technical support please call 1-800-333-7421

● America time zone:

Johnson City, TN, USA 800 333 7421 +1 423 262 5710

● Asia and Australia time zone:

Beijing, China +86 400 810 4288

● Europe and Africa time zone:

Nuremberg, Germany +49 911 895 7222 +49 180 5050 222

Technical Support (Internet)Send your inquiries directly via the internet to a specialist in technical support:

https://support.industry.siemens.com/cs/sc?lc=en-WW


https://www.industry.usa.siemens.com/drives/us/en/electric-drives/Pages/electric-drives.aspx

● Technical support is available round the clock 24 hours / 365 days a year.

● Your inquiries are delivered directly to the responsible specialist.

● Have all relevant data available and technical support can respond to your inquiry as quickly as possible.

● Send records, screen shots and photos to the specialists to support fault analysis.

Service and support11.1 Field Service Operation


ESD guidelines AA.1 ESD-sensitive Components

Guidelines for Handling Electrostatic Sensitive Devices (ESD)

NOTICE

ESD Sensitive Equipment● Always be aware of electrostatic discharge (ESD) when working near or touching

components inside the VFD cabinet. The printed circuit boards contain components that are sensitive to electrostatic discharge. Handling and servicing of components that are sensitive to ESD should be done only by qualified personnel and only after reading and understanding proper ESD techniques. The following ESD guidelines should be observed. Following these rules can greatly reduce the possibility of ESD damage to printed circuit board (PCB) components.

● Always transport static sensitive equipment in antistatic bags.● Always use a soldering iron that has a grounded tip. Also, use either a metallic vacuum-

style plunger or copper braid when desoldering.● Ensure that anyone handling the printed circuit boards is wearing a properly grounded

static strap. The wrist strap should be connected to ground through a 1 Megohm resistor. Grounding kits are available commercially through most electronic wholesalers.

● Static charge build-up can be removed from a conductive object by touching the object with a properly grounded piece of metal.

● When handling a PC board, always hold the card by its edges.● Do not slide printed circuit boards (PCBs) across any surface (e.g., a table or work bench).

If possible, perform PCB maintenance at a workstation that has a conductive covering that is grounded through a 1 Megohm resistor. If a conductive tabletop cover is unavailable, a clean steel or aluminum tabletop is an excellent substitute.

● Avoid plastic Styrofoam™, vinyl and other non-conductive materials. They are excellent static generators and do not give up their charge easily.

● When returning components to Siemens Industry, Inc. always use static-safe packing. This limits any further component damage due to ESD.


Components that can be destroyed by electrostatic discharge (ESD)

NOTICE

Electrostatic discharge

Electronic components can be destroyed in the event of improper handling, transporting, storage, and shipping.

Pack the electronic components in appropriate ESD packaging; e.g. ESD foam, ESD packaging bags and ESD transport containers.

To protect your equipment against damage, follow the instructions given below.

● Avoid physical contact with electronic components. If you need to perform absolutely essential work on these components, then you must wear one of the following protective gear:

– Grounded ESD wrist strap

– ESD shoes or ESD shoe grounding strips if there is also an ESD floor.

● Do not place electronic components close to data terminals, monitors or televisions. Maintain a minimum clearance to the screen (> 10 cm).

● Electronic components should not be brought into contact with electrically insulating materials such as plastic foil, plastic parts, insulating table supports or clothing made of synthetic fibers.

● Place components in contact with ESD-suited materials e.g. ESD tables, ESD surfaces, ESD packaging.

● Measure on the components only if one of the following conditions is met:

– The measuring device is grounded with a protective conductor.

– The measuring head of a floating measuring device has been discharged directly before the measurement.

The necessary ESD protective measures for the entire working range for electrostatically sensitive devices are illustrated once again in the following drawings. Precise instructions for ESD protective measures are specified in the standard IEC 61340-5-1.

ESD guidelinesA.1 ESD-sensitive Components


1 Sitting2 Standing3 Standing/sittinga Conductive floor surface, only effective in conjunction with ESD shoes or ESD shoe grounding

stripsb ESD furniturec ESD shoes or ESD shoe grounding strips are only effective in conjunction with conductive floor‐

ingd ESD clothinge ESD wristbandf Cabinet ground connection

Figure A-1 ESD Protective Measures





Index

AArcing, 14Asynchronous motors, 11Auxiliary power supply, 11

CCabling, 11Commissioning, 11contact

hotline, 173website, 173

EElectrostatic discharge, 175Electrostatic Protective Measures, 177EMC-compliant installation, 11

FFive safety rules, 12Fixed Under Frequency with MSE, Fixed Under Power with MSE, Fixed Over Speed, 31, 54, 56, 57, 134, 135, 136, 137Fixed Pickup Instantaneous Zero Sequence Overvoltage, 128Fixed Pickup Maximum Power Factor, 124Fixed Pickup Minimum Power Factor, 126Fixed Pickup Underfrequency, 143Fixed Under Power with MSE, 48, 58, 80, 82, 130

GGrounding, 11

IIndustrial network, 11Installation, 11

LLock-out / Tag-out procedure, 13

MMain entry, 160

Subentry, 139

SShielding, 11Starts per Hour, 133Synchronous motors, 11

Ttechnical support

hotline, 173Transport, 11

VVariable Pickup Overfrequency, 139Variable Pickup Underfrequency, 137, 145Variable Thermal Overload, 63Variable-Speed Drives, 11


Index


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