O & M Manual for the Fixed and Drawout Magum Transfer Switches _ Instruction Booklet _ IB01602011E _...

8/20/2019 O & M Manual for the Fixed and Drawout Magum Transfer Switches _ Instruction Booklet _ IB01602011E _ EATON®…

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IB01602011E For more information visit: www.Eaton.com

O & M Manual for the Fixed and

Drawout Magnum Transfer SwitchesInstruction Booklet

Description Page

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Receiving, Handling, and Storage . . . . . . . . . . . . . . . . . . . . 10

Equipment Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Drawout and Fixed Switching Devices . . . . . . . . . . . . . . . . 27

Operation of the Bypass Isolation Transfer Switch . . . . . . . . 30

Testing and Problem Solving . . . . . . . . . . . . . . . . . . . . . . . 34

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Renewal Parts Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4000A Magnum 2000A Magnum


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For more information visit: www.Eaton.com IB01602011E

Instructional BookletPage 2 Effective: March 2014

Fixed and Drawout Magnum Transfer Switches

Figure 1. Typical Automatic Transfer Switch Equipment Nameplate.

Step 1: Remove any dirt or debris that may have collected duringshipment or installation. NEVER use high pressure blow-ing air. This could drive dirt or other foreign objects intoelectrical or mechanical components which could causedamage. Use an industrial quality vacuum cleaner toremove any dirt or foreign objects.

Step 2: Be certain all cable connections are correct and that thephase rotation of both sources match.

Step 3: Inspect the engine start connections and verify the cor-rect connection of all control wires.

Step 4: Check all programmable setpoints and adjust as neces-sary. In addition, adjust any optional accessories asrequired.

Step 5: Be certain that the actual lug torque values are in keepingwith the requirements outlined in the instruction book to

insure the integrity of power connections.Step 6: Check to be sure that all covers and barriers are properly

installed and fastened.

ALL POSSIBLE CONTINGENCIES WHICH MAY ARISE DURING INSTALLATION, OPERATION, OR MAINTENANCE, AND ALL DETAILS AND VARIA-TIONS OF THIS EQUIPMENT DO NOT PURPORT TO BE COVERED BY THESE INSTRUCTIONS. IF FURTHER INFORMATION IS DESIRED BY THEPURCHASER REGARDING HIS PARTICULAR INSTALLATION, OPERATION, OR MAINTENANCE OF PARTICULAR EQUIPMENT, CONTACT ANEATON REPRESENTATIVE.

WARNING

READ AND UNDERSTAND THE INSTRUCTIONS CONTAINED HEREIN-AFTER BEFORE ATTEMPTING TO UNPACK, ASSEMBLE, OPERATE,OR MAINTAIN THIS EQUIPMENT.

HAZARDOUS VOLTAGES ARE PRESENT INSIDE TRANSFER SWITCHENCLOSURES THAT CAN CAUSE DEATH OR SEVERE PERSONALINJURY. FOLLOW PROPER INSTALLATION, OPERATION, AND MAIN-TENANCE PROCEDURES TO AVOID THESE VOLTAGES.

TRANSFER SWITCH EQUIPMENT COVERED BY THIS INSTRUCTIONBOOK IS DESIGNED AND TESTED TO OPERATE WITHIN ITS NAME-PLATE RATINGS. OPERATION OUTSIDE OF THESE RATINGS MAYCAUSE THE EQUIPMENT TO FAIL RESULTING IN DEATH, SERIOUSBODILY INJURY, AND/OR PROPERTY DAMAGE. ALL RESPONSIBLEPERSONNEL SHOULD LOCATE THE DOOR MOUNTED EQUIPMENTNAMEPLATE AND BE FAMILIAR WITH THE INFORMATION PROVIDEDON THE NAMEPLATE. A TYPICAL EQUIPMENT NAMEPLATE ISSHOWN IN FIGURE 1.

NOTICE

A FINAL INSPECTION OF THE EQUIPMENT SHOULD BE PERFORMEDPRIOR TO ENERGIZING THE TRANSFER SWITCH.

Transfer Switch

GO#

Cat#Style#

Volts:

Poles:

ABC0123

ATVIMGB33200XRU

120-6003 3

3200 Amps:Phases:

A101220707 8165A18H02

Item#

CS#Piece:

Hertz: 50/60

Wire: 3/4

001

1 of 3


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Instructional BookleEffective: March 2014 Page


Section 1: Introduction

1.1 Preliminary Comments and Safety Precautions

This technical document is intended to cover most aspects associ-ated with the installation, application, operation, and maintenanceof transfer switch equipment with ratings from 800 through 5000

amperes (A), except for the specific logic used to control theequipment. It is provided as a guide for authorized and qualifiedpersonnel only. Please refer to the specific WARNING and CAU-TION in Section 1.1.2 before proceeding. If further information isrequired by the purchaser regarding a particular installation, appli-cation, or maintenance activity, contact an Eaton representative.For information associated with the control, refer to the separateinstruction book pertaining to the logic package installed in theswitch.

1.1.1 Warranty and Liability Information

No warranties, expressed or implied, including warranties of fit-ness for a particular purpose of merchant-ability, or warrantiesarising from course of dealing or usage of trade, are made regard-ing the information, recommendations and descriptions containedherein. In no event will Eaton be responsible to the purchaser or

user in contract, in tort (including negligence), strict liability orotherwise for any special, indirect, incidental or consequentialdamage or loss whatsoever, including but not limited to damage orloss of use of equipment, plant or power system, cost of capital,loss of power, additional expenses in the use of existing powerfacilities, or claims against the purchaser or user by its customersresulting from the use of the information and descriptions con-tained herein.

1.1.2 Safety Precautions

All safety codes, safety standards, and/or regulations must bestrictly observed in the installation, operation, and maintenance ofthis device.

.

1.2 General Information

Transfer switches are used to protect critical electrical loadsagainst loss of power. The Source 1 power source of the load backed-up by a Source 2 power source. A transfer switch is cnected to both the Source 1 and Source 2 power sources and splies the load with power from one of these two sources. In thevent that power is lost from the Source 1 power source, thetransfer switch transfers the load to the Source 2 power sourceThis transfer can be automatic or manual, depending upon thetype of transfer switch equipment being used. Once Source 1power is restored, the load is automatically or manually trans-ferred back to the Source 1 power source, again depending upothe type of transfer equipment being used (Figure 2).

In addition, the Eaton closed transition transfer switch may be

applied where it is desirable to avoid any momentary power interuptions. Although the closed transition switch is not a substitufor an uninteruptable power source (UPS), it does eliminate powinterruptions to loads except to those caused by power sources equipment external to the transfer switch. If both sources areacceptable as determined by the IQ Transfer logic, a make-befobreak transfer is performed during a transfer test or retransferoperation.

1.2.1 Transfer Switch Types

There are four types of transfer switch equipment.

Automatic Transfer Switch

Automatic transfer switches (ATSs) automatically perform thetransfer function. They consist of three basic elements:

1. Main contacts to connect and disconnect the load to and frothe source of power.

2. Intelligence/supervisory circuits to constantly monitor the cdition of the power sources and thus provide the intelligencnecessary for the switch and related circuit operation.

3. A transfer mechanism to effect the transfer of the main cotacts from source to source.

WARNING

THE WARNINGS AND CAUTIONS INCLUDED AS PART OF THE PRO-CEDURAL STEPS IN THIS DOCUMENT ARE FOR PERSONNEL SAFETYAND PROTECTION OF EQUIPMENT FROM DAMAGE. AN EXAMPLEOF A TYPICAL WARNING LABEL HEADING IS SHOWN ABOVE TOFAMILIARIZE PERSONNEL WITH THE STYLE OF PRESENTATION.THIS WILL HELP TO INSURE THAT PERSONNEL ARE ALERT TOWARNINGS, WHICH APPEAR THROUGHOUT THE DOCUMENT. INADDITION, CAUTIONS ARE ALL UPPER CASE AND BOLDFACE.

CAUTION

COMPLETELY READ AND UNDERSTAND THE MATERIAL PRESENTEDIN THIS DOCUMENT BEFORE ATTEMPTING INSTALLATION, OPERA-TION, OR APPLICATION OF THE EQUIPMENT. IN ADDITION, ONLYQUALIFIED PERSONS SHOULD BE PERMITTED TO PERFORM ANY

WORK ASSOCIATED WITH THE EQUIPMENT. ANY WIRINGINSTRUCTIONS PRESENTED IN THIS DOCUMENT MUST BE FOL-LOWED PRECISELY. FAILURE TO DO SO COULD CAUSE PERMA-NENT EQUIPMENT DAMAGE.

WARNING

THE CLOSED TRANSITION PRODUCT CONTAINS A SPECIAL CON-TACT ARRANGEMENT (OVERLAPPING CONTACTS). MISUSE CANRESULT IN DEATH, SEVERE PERSONAL INJURY, AND/OR PROPERTDAMAGE.


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Basic Transfer Switch (Power Panel)

The basic transfer switch is designed for use with customer fur-nished logic. It is similar in design to the automatic version,except the intelligence circuit (logic panel) and voltage selectionpanel are omitted. All control devices are the customer’sresponsibility.

Figure 2. Typical Load Transfer Switch (Switching Device Type)Schematic.

Non-Automatic Transfer Switch (Electrically Operated)

Non-automatic transfer switches are manually initiated, electricallyoperated devices for applications where automatic load transfer isnot required.

Bypass Isolation Transfer Switch

The bypass isolation switch is designed for applications wheremaintenance, inspection, and testing must be performed whilemaintaining continuous power to the load (Figures 3 and 4). Thisis typically required in critical life support systems and standbypower situations calling for safe system maintenance with nopower disruptions. Such a design allows for the quick removal ofthe different switching devices for inspection, maintenance, orreplacement.

The ATS, non-automatic transfer switch (electrically operated),and bypass isolation transfer switch are the available types for theconfiguration described in this manual.

Operation of the ATS and the bypass isolation switch only are dis-cussed in this manual (Sections 5 and 7 respectively).

1.2.2 Design Configuration

The Eaton transfer switch is a rugged, compact design utilizing

power case switches or power case circuit breakers to transferessential loads from one power source to another. Open transi-tion switching devices are interlocked to prevent both switchingdevices from being closed at the same time. The versatile design,in addition to standard transfer functions, offers an optional inte-gral thermal and short circuit protection in either or both switchingdevices.

The switching devices are in a compact vertical arrangement. Thelogic can be easily disconnected from the switching device with-out disturbing critical connections. The enclosure is free standing,and, by using the specially supplied cleats, the switch is (Option42) OSHPD Seismic Certified (3200 A and below). The terminalsare mounted in the rear of the switch, permitting rear, top, bot-tom, or side cable or bus bar entrance.

The switching devices have a high withstand rating (Table 1). Thehigh-speed, stored-energy switching mechanism guarantees atransfer time of less than 5 cycles.

Figure 3.Typical Bypass Isolation Switch.

Source 1

Source 2

Load

Typical Bypass Isolation SwitchTypical Non-Bypass Isolation Switch


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.

Figure 4.Typical Bypass Isolation Switch Schematic.

Table 1. System Coordination Information—Withstand, Closing and Interrupting Ratings

A Ratings used for coordination with upstream breakers with short-time ratings.

UL 1066 short-time withstand rating.

SOURCE 1

SOURCE 1SOURCE 1

SOURCE 1 BYPASS

SOURCE 1

SOURCE 1

SOURCE 1AVAILABLE

SOURCE 2ISOLATED

ISOLATED

POSITION

SOURCE 2POSITION

SOURCE 2AVAILABLE

SOURCE 2SOURCE 2

SOURCE 2INCOMING

ATS

BYPASS

BYPASSATS

LOAD

SOURCE 2 BYPASS

INCOMING

A

A

TRANSFER SWITCHAMPERE RATING

3-CYCLE

SHORT-CIRCUIT600V (kA)

30-CYCLE

SHORT-TIME600V (kA)

UL 1008

800 100 85

1000 100 85

1200 100 85

1600 100 85

2000 100 85

2500 100 85

3000 100 85

3200 100 85

4000 100 ---

UL 891

4000 --- 855000 --- 85


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1.3 Magnum Fixed and Drawout Switching Devices

1.3.1 General Magnum Switching Device

In a typical Magnum automatic transfer switch, the switchingdevice is a Magnum power case switch. The magnum power caseswitch does not include an overcurrent trip. For specific applica-

tions like an integrated service entrance rated automatic transferswitch or an application where it is desirable to include overcur-rent trips to the magnum device, a magnum breaker can be pro-vided on either or both Source 1 and/or Source 2 device. Inthose cases the magnum device includes an overcurrent trip. Thestandard trip unit is a Digitrip 520. Optionally a digitrip 520M,520MC, or 1150 can be provided.

Figure 5. The Magnum Fixed Switching Device.

The magnum power case switch can be provided in a standardfixed mounted design or an optional drawout design. Bypass iso-lation automatic transfer switches are provided with all drawouttype designs. In addition the 4000A and 5000A designs comestandard with drawout magnum power devices.

Figure 6. The Magnum Drawout Switching Device.

The Magnum transfer switches are available in the following con-figurations:

Table 2. Magnum Transfer Switch Configurations

All Magnum switching devices are 100% rated, Underwriters Lab-oratories (UL) listed, and are built and tested in an ISO 9002 certi-fied facility to applicable NEMA, ANSI, IEEE, and UL standards.For more information on Magnum switching devices, consult theMagnum switching device manual supplied with the transferswitch.

The main difference between the fixed and drawout versions ofthe Magnum switching devices used in the Magnum transferswitch is the mounting method. Fixed switching devices arebolted directly into the transfer switch frame while drawout

switching devices are mounted in an extendable carriage withinthe transfer switch, allowing the switching device to be “drawnout” for service, maintenance, and/or replacement.

NUMBER OF

SWITCHING DEVICES

SWITCHING DEVICE

TYPE

2 Fixed

2 Drawouts

4 (Bypass Isolation) Drawouts


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Figure 7. Fixed Switching Device for the Magnum TransferSwitch.

Figure 8. Drawout Switching Device Installed in the MagnumTransfer Switch.

1.3.2 Magnum Drawout Switching Devices

The Magnum drawout switching device is a design having threepositions with the compartment door closed (CONNECT, TEST,DISCONNECT) and one position out of its compartment on theextendable carriage rails (REMOVE). The Magnum drawoutswitching device is equipped with both primary and secondary dis-connects to provide for the drawout functioning. The operatingmechanism is a two-step, stored energy mechanism, either manu-ally or electrically operated. When withdrawn on the extendablecarriage rails, Magnum switching devices can be inspected, acces-sory items added, and minor maintenance performed. The insideof the compartment can also be inspected with the switchingdevice withdrawn on the extendable carriage rails.

Figure 9. Drawout Switching Device Fully Extended from theMagnum Transfer Switch.

1.3.3 Magnum Fixed Switching Devices

The Magnum fixed type switching device differs from the drawoversion in that it has no levering device, primary disconnects, asecondary disconnects.

Figure 10. Primary and Secondary Connections on a MagnumFixed Switching Device.

PRIMARY CONNECTIONS

SECONDARY CONNECTIONS


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In addition, a fixed switching device does not have a standard fea-ture to hold the switching device in a “trip-free” position.

Magnum fixed switching device terminals have holes for makingbolted horizontal primary bus connections. Adapters are availablefor making vertical primary bus connections. Secondary connec-tions can be made through standard terminal blocks or a special

connector compatible with the drawout switching device’s typesecondary connector. Both secondary connection devices aremounted at the top front of the switching device.

The Magnum fixed switching devices have two mounting feet,one on each side, to permit the switching device to be securelymounted to the transfer switch frame. Each mounting foot hastwo slotted mounting holes to facilitate mounting.

1.4 Transfer Switch Catalog Number Identification

Transfer switch equipment catalog numbers provide a significantamount of relevant information that pertains to a particular pieceof equipment. The catalog number identification table (Table 3)provides the required interpretation information. An example foran open transition switch is offered to initially simplify the pro-cess.

Example: Catalog Number (circled numbers correspond to positionheadings in Table 3).

The catalog number ATVIMGB33200XRU describes an ATS withthe switching devices mounted vertically in the enclosure. Theintelligence, represented by the ATC-600/ATC-800, is a micropro-cessor-based logic package. The Magnum Breaker is used as theswitching device and is a 3-pole power case breaker for eachsource. The continuous current rating of this equipment is 3200 Aand is applicable at 480/277 Vac, 60 Hz. The transfer switch

equipment is enclosed in a NEMA 3R enclosure and is listed forUnderwriters Laboratories (UL) and Canadian Standards Associa-tion (CSA) applications.


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Table 3. Transfer Switch Catalog Number Explanation.

AT 3200

Orientation

Position 3

V= Vertical

Amperes

Position 9-12

0200=200A

0300=300A

0400=400A

0600=600A

0800=800A

1000=1000A

1200=1200A

1600=1600A

2000=2000A

2500=2500A

3000=3000A

4000=4000A*5000=5000A*

Voltage

Position 13

A=120V

B=208/120V

E=600V

G=220/127V

G=220V

H=380/220V

O=415/240V

W=240V/120V

W=240V

X=480/277V

X=480/240V

Number

of Poles

Position 8

2=2 poles

3=3 poles

4=4 poles

Enclosure

Position 14

S=NEMA 1

R=NEMA 3R

T=Thru Door

Design

Logic

Certification

Position 15

U=UL Listed

R=UL Recognized

X=No Listing

V I MG B 3 X R U

Frame

Position 1-2

AT=Automatic

CT=Closed Transition

BI =Bypass Transition

CB=Closed Transition/

Bypass Isolation

NT=Non Auto

Position 5-6

Power Case

Magnum DS MG

Position 7

A=Fixed Mount

PowerCase Switch (PCS Both)

B=Fixed Mount, Power Case

Circuit Breaker (PCCB Both)

C=Fixed Mount,

PCCB Normal, PCS Emergency

D=Fixed Mount,

PCS Normal, PCCB Emergency

E=Drawout, PCS Both

F=Drawout, PCCB Both

G=Drawout, PCCB Normal,

PCS EmergencyH=Drawout, PCS Normal,

PCCB Emergency

Switch

Type

Position 4

I=ATC-600 Controller

(Open Transition,

AT & BI type ATS)

I=ATC-800 Controller

Close Transition,

CT & CB type ATS)

I= Electro Mechanical

3200=3200A

Note: 4000A and 5000A is Drawout Only.


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Section 2: Receiving, Handling, and Storage

2.1 Receiving

Every effort is made to ensure that the transfer switch equipmentarrives at its destination undamaged and ready for installation.Crating and packing is designed to protect internal components as

well as the enclosure. Transfer switch enclosures are skidmounted and suited for fork lift movement. Care should be exer-cised, however, to protect the equipment from impact at all times.Do not remove the protective packaging until the equipment is atthe installation location and ready for installation.

When the transfer switch equipment reaches its destination, thecustomer should inspect the shipping container for any obvioussigns of rough handling and/or external damage incurred duringtransportation. Record any external and internal damage observedfor reporting to the transportation carrier and Eaton, once a thor-ough inspection is completed. All claims should be as specific aspossible and include the General Order numbers.

A shipping label is affixed to the top of the shipping containerwhich includes a variety of equipment and customer information,such as General Order Number (GO #) and Catalog Number(Cat #). Make certain that this information matches other ship-ping paper information.

Each transfer switch enclosure is bolted to a rigid wooden pallet.The pallet is open at two ends for movement by a fork lift. Theshipment is secured and further protected with shrink wrap. Donot discard the packing material until the equipment is ready forinstallation.

A plastic bag of documents will be found within the enclosure,usually attached to the inside of the door. Important documents,such as test reports, wiring diagrams, and appropriate instructionleaflets, are enclosed within the bag and should be filed in a safeplace.

2.2 Handling

As previously mentioned, the transfer switch equipment is pack-aged for fork lift movement. Protect the equipment from impact

at all times and DO NOT double stack. Once the equipment is atthe installation location and ready for installation, the packagingmaterial can be removed. Once the enclosure is unbolted from thewooden pallet, it can be installed using the lifting provision locatedon the top of the structure. Be careful not to damage the top orbottom enclosure mounting flanges. Refer to Section 4 of thismanual for specific installation instructions.

2.3 Storage

Although well packaged, this equipment is not suitable for storageoutdoors. The equipment warranty will not be applicable if thereis evidence of outdoor storage. If the equipment is to be storedindoors for any period of time, it should be stored with its protec-tive packaging material in place. Protect the equipment at alltimes from excessive moisture, construction dirt, corrosive condi-tions, and other contaminants.

It is strongly suggested that the package-protected equipment bestored in a climate controlled environment of -20° to 85°C(-4° to 185°F) with a relative humidity of 80% or less. DO NOT,under any circumstances, stack other equipment on top of a trans-fer switch equipment enclosure, whether packaged or not.

Section 3: Equipment Description

3.1 General

This Eaton transfer switch equipment is available in three differentconfigurations:

• ATS (Closed and Open transition);

• Non-Automatic (Electrically Operated) (Open Transition Only);

• Bypass Isolation Transfer Switch (Open and Closed Transition);and

Refer to Section 1 for a discussion of all three types. Each trans-fer switch is usually supplied in an enclosure, although unmountedsub-assemblies can be supplied for mounting by the customer.The enclosed ATS is the only specific type that will be discussedin this section.

Figure 11. Typical Power Compartments (Open TransitionShown).

The enclosed ATS consists of three basic panels interconnectedthrough connector plugs and mounted in an enclosure:

• Power Compartments;

• Voltage Selection Panel; and

• Logic Panel• ATC-600 (open transition only)• ATC-800 (closed transition only).


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The components comprising the three panels are installed in accor-dance with the specific requirements of the circuit being controlled.Each transfer switch is, therefore, tailor-made to a specific applica-tion.

3.2 Power Compartments

The power compartment consists of a means for making load,power, and neutral connections. The main contacts and the trans-fer mechanism are all on one steel frame (Figure 12). The actualpower connections are shown in Figure 13.

Figure 12. Power Case Switching Device.

3.2.1 Main Contacts

The main contacts connect and disconnect the load to and fromthe different power sources. High withstand power case switchare the main contacts for the Source 1 and Source 2 powersources in standard, unmodified ATSs. Optional integral thermand short circuit protection in either or both switching devices

available (Section 3.6). These continuous duty devices are ratefor all classes of loads. In addition, they have high dielectricstrength, heavy-duty switching and withstand capabilities, andhigh interrupting capacity.

3.2.2 Switch Interlocks (Open Transition Only)

Eaton transfer switches are mechanically and electrically inter-locked to prevent the two sets of main contacts from being clossimultaneously.

3.2.3 Drawout Interlocks

The standard closed transition ATS is not provided with amechanical interlock. All bypass switching devices are mechancally interlocked to the drawout mechanism to ensure that theswitching device is always open when connecting or disconnecing it from the line and load stabs when in the bypass mode.

All open transition switching devices are mechanically interlockto the drawout mechanism to ensure that the switching device always open when connecting or disconnecting it from the lineand load stabs.

The switching device will close only in the DISCONNECT, TESTand CONNECT positions.


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3.2.4 TRANSFER MECHANISM

The transfer switch uses Eaton Magnum power case switchingdevices and power case switches with a stored-energy mecha-nism. An electrical operator automatically recharges the mecha-nism after the switching device has been closed, and an indicatoron the switch shows whether it is in the OPEN or CLOSED posi-

tion and the status of the stored energy mechanism.

The switching device is closed by energizing a solenoid thatreleases the spring mechanism. A shunt trip will open the switch-ing device if energized.

Figure 13. Terminal Connections for a Typical Drawout Transfer Switch (800-3200A Closed Transition Shown).

Figure 13a. Terminal Connections for a Typical Drawout Transfer Switch (4000A Shown).

SOURCE 1

CABLE

CONNECTIONS

LOAD CABLE

CONNECTIONS

SOURCE 2

CABLECONNECTIONS

NEUTRAL BOND

IF REQUIRED

NEUTRAL

GROUND

CABLE

CONNECTIONS

CABLE

CONNECTIONS

NEUTRAL

ASSEMBLY

NORMAL

CABLE

CONNECTIONS

LOAD CABLE

CONNECTIONS

EMERGENCY

CABLE

CONNECTIONS

NORMAL

LOAD

NEUTRAL


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3.2.5 Drawout Mechanism

The drawout mechanism is described in detail in Section 6(Figure 14).

Figure 14. Drawout Mechanism (Closed Transition Shown)

3.3 Voltage Selection Panel

3.3.1 Voltage Selection (208, 220, 240, 380, 415, 480, and600 Vac, 50/60 Hz)

The market voltage selection panel consists of multi-tap trans-formers, contained in a steel case mounted in the transfer switchenclosure (Figure 15). The cover has “teardrop” holes for thescrews to allow easy access to the transformers. The voltage isselected by simply removing the wires from the default primarytaps of both transformers and installing them on the primary tapsfor the desired voltage. Taps are provided for 208 to 600 Vac tosatisfy any required North American market application voltage.The factory default position is the voltage tap based on customervoltage specification.

Figure 15. Voltage Selection Panel

Figure 16. North American Market Voltage Selection Terminals

(Shown Connected to the 120 Vac Taps).

3.4 Logic Panel

The logic panel provides the intelligence and supervisory circuitwhich constantly monitor the condition of both the Source 1 anSource 2 power sources, thus providing the required intelligencfor transfer operations (Figure 17). Detailed information is pre-sented in a separate document:

• ATC-600 Instruction Book (IB ATS-I005 - open transition onl

• ATC-800 Instruction Book (IB ATS-CI03 - closed transition on

WARNING

WHEN CHANGING THE SELECTED VOLTAGE, THE POWER MUST BEREMOVED FROM THE TRANSFER SWITCH AND THE WIRES MUSTBE MOVED ON THE TAPS OF BOTH TRANSFORMERS.


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Figure 17. ATC-800.

3.5 NeutralsAll 2-pole and 3-pole transfer switches are equipped with 100%rated neutral connections (Figures 18 and 19). Different lug con-figurations are available (See Option 21A).

Figure 18. Neutral SE with Ground Fault.

Figure 19. Solid Neutral.

3.6 Features

Switch options, which are not part of the logic scheme, are avail-able to meet a variety of other application requirements. Optionsare numbered with an associated description. More detailed selec-tions, which must be made within a specific option number, areidentified by letters. For available options associated with thelogic scheme, refer to the specific logic document associated withthe type of logic selected.

Section 3.6 covers a whole series of features in all of the otherIB's, but in the magnum only a few features were included.

3.6.1.1 Standard Features

The following is a list of the standard features of the ATC-600/800 controller.

Feature DescriptionTimers

1. Time Delay Normal to Emergency (TDNE)

Provides a time delay to allow for the generator to warm up beforetransferring the load to the emergency source. Timing begins onlyafter the Emergency Source becomes available and is deemedgood based on the programmable voltage and frequency set pointsin the controller.

Load Connections

Source Connections

Ground Connections

Neutral Bond

NOTICE

OPTIONS ARE UL LISTED, EXCEPT AS NOTED, WHEN SUPPLIED ONUL LISTED SWITCHES. IF AN OPTION IS SELECTED WHICH IS NOTUL LISTED, THE SWITCH WILL NOT HAVE A UL LABEL.

NOTICE

NOT ALL OPTIONS ARE AVAILABLE FOR ALL TRANSFER SWITCHCONFIGURATIONS. IF IN DOUBT, CHECK PRICE LIST 29-920 FORTHE AVAILABILITY OF OPTIONS FOR A SPECIFIC TRANSFERSWITCH DESIGN. THE OPTION NUMBERS USED HERE CORRE-SPOND TO THE NUMBERS USED IN THE PRICE LIST.

Load

Connections

SourceConnections

GroundConnections


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2. Time Delay Engine Start (TDES)

Provides a time delay before initiating the generator start cycle.This is to account for momentary power outages or voltage fluctu-ations of the normal source. Provides a Form C contact to the gen-erator starter circuit.

3. Time Delay Emergency to Normal (TDEN)

Provides a time delay of the retransfer operation to permit stabili-zation of the normal source. Timing begins only after the normalsource becomes available and is deemed good based on the pro-grammable voltage and frequency set points in the controller. Thisfunction is fail-safe protected.

4. Time Delay Engine Cooldown (TDEC)

Provides a time delay before initiating the generator stop cycleafter the retransfer operation. This allows the generator to cooldown by running unloaded. Timing begins on completion of theretransfer cycle.

Source 2 Sensing

5. Source 2-Monitoring and Protection

Provides monitoring and protection based on the Source 2 voltageand/or frequency set points. All Feature 5 monitoring and protec-tion functions are fail-safe operations.

5J. All-Phase Undervoltage/

Underfrequency Protection Provides undervoltage/underfrequencymonitoring and protection based on programmable set points inthe controller.

5K. All-Phase Overvoltage/

Overfrequency Protection Provides overvoltage/overfrequencymonitoring and protection based on programmable set points inthe controller.

6B. Test Operators

Automatic transfer switches are provided with a controller face-plate test pushbutton that simulates a loss of the Source 1 asstandard. All programmed time delays (TDNE, TDEN, etc.) will be

performed as part of the test. Engine run time of the test is equalto the plant exerciser programmed set point. All tests are fail-safeprotected.

7. Time Delay Emergency Fail (TDEF)

Provides a time delay that prevents a connected emergencysource from being declared "unavailable" based on the customer'sset points. This is to account for momentary generator fluctua-tions. If the Source 2 remains in a failed state, then 0.5 secondafter the TDEF timer expires the transfer switch will proceed withthe programmed sequence for retransfer if Source 1 is available.This time delay is only implemented when Source 2 is a generator.

Note: This feature is also enabled when large loads cause generator outputto drop below customer set points.

8. Time Delay Bypass Pushbutton

Provides a momentary contact pushbutton to bypass the TDNE(Feature 1) and/or TDEN (Feature 3) time delays. The Time DelayBypass Pushbutton contact, when closed, will reduce any or all ofthe programmed time delay to zero. Must be executed when TDNEor TDEN timer is displayed on the controller.

8C. Bypass Time Delay Emergency to Normal (TDEN)

8D. Bypass Time Delay Normal to Emergency (TDNE)

10. Preferred Source Selector

Provides a means to designate either Source 1 or Source 2 as t"Preferred" source. The "Preferred" source is the source that thtransfer switch will connect the load to if it is available.

Note: This is a programmable software feature not an actual switch.

10B. Preferred Source Selector

Provides a programmable source selector for use on systems coprised of dual utility or utility and engine/ generator powersources.

10D. Preferred Source Selector

Provides a programmable source selector for use on systems coprised of dual engine/generator power sources. (Dual engine staing circuits are provided.)

12C. Source 1-Load Connected

Provides a green indication that indicates the load is connected Source 1 when lit. 12D. Source 2-Load Connected Provides a rindication that indicates the load is connected to Source 2 whelit.

12G. Source 1-Present

Provides a white or amber indication "Depending on the Controler" that Source 1 has power; however, this does not indicatewhether Source 1 is acceptable.

12H. Source 2-Present

Provides an amber indication that Source 2 has power; howevethis does not indicate whether Source 2 is acceptable.

14. Relay Auxiliary Contacts

14E. Source 1 Available

Provides 1 Form C relay auxiliary contact. The relay is energizedwhen Source 1 is available and within the controller's programmble set points.

14F. Source 2 Available

Provides 1 Form C relay auxiliary contact. The relay is energized

when Source 2 is available and within the controller's programmble set points.

15. Switch Position Indication Contact

Provides a contact that indicates if the power switching device in the "open" or "closed" position.

15E. Source 1 Position Indication Contact

Provides 1 Form C contact that indicates the position of theSource 1 power switching device.

15F. Source 2 Position Indication Contact

Provides 1 Form C contact that indicates the position of theSource 2 power switching device.

Plant Exerciser

23J. Plant Exerciser (PE) With Fail-SafeProvides a means for automatic testing of the engine generator sor standby power system. All programmed time delays in the cotroller will be performed during the plant exerciser operation. Prgrammable set points for test interval are start time, eitherdisabled or 7 days, and engine test time. Test may be performewith or without a load transfer. Test may be manually cancelledduring the operation. This is a fail-safe operation.


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26D. Go to Emergency (Source 2)

Provides the capability for an external contact closure to initiate atransfer to the Source 2 power source. This includes starting thegenerator, performing the programmed time delays and the trans-fer operation. Retransfer will occur when the external contact isopened. This is a fail-safe function.

Source 1 Sensing

26. Source 1-Monitoring and Protection

Provides Source 1 monitoring and protection functions. If Source1 fails, then the automatic transfer controller will begin thesequence of operations necessary to transfer the load to Source 2.All Feature 26 monitoring and protection functions are fail-safeoperations.

26J. All-Phase Undervoltage/ Underfrequency Protection

Provides all-phase undervoltage/ underfrequency monitoring andprotection based on programmable set points in the controller.

26K. All-Phase Overvoltage/ Overfrequency Protection

Provides all-phase overvoltage/ overfrequency monitoring and pro-tection based on programmable set points in the controller.

32. Delayed Transition Transfer Modes for Open Transition Trans-fer Switches

Provides delayed transition transfer modes for an open transitiontransfer switch. Often used in systems with inductive loads, adelayed transition transfer switch may prevent or reduce inrushcurrents due to out-of-phase switching of inductive loads.

32A. Time Delay Neutral

Provides a time delay in the neutral position during the transferand retransfer operations during which both Source 1 and Source2 are disconnected from the load circuit. This allows inductiveloads time to reach a safe voltage and eliminate back EMF. Thetime delay is programmable and is the same for both transfer andretransfer operations This is a passive feature that requires theconsulting engineer/installer to determine the settings based onhow the user will operate the facility. Adjustable 0-120 seconds.

42. Seismic Qualification

59a. Silver-Plated Bus

Silver-plated bus is a standard feature for all Magnum-baseddesigns.

3.6.1.2 Optional Features

The following is a list of the optional features of the ATC-600/800controller.

5H. Three-Phase Rotation Protection

Provides three-phase reversal sensing in order to protect againsttransferring to an out-of-phase source. The controller will treat theopposite source as unavailable if the sources are out of phase,based on programmable set points in the controller.

6H. 4-Position Test Selector Switch (FPSS)Provides a door-mounted 4-position, maintained contact selectorswitch marked "Auto," "Test," "Engine Start," and "Off." TheFPSS is fail-safe protected, except for the "Off Position." Transferswitch operation is determined by the switch position. Transferswitch operations are as follows: "Auto"-Automatic operationmode. "Test"-A load test is performed until the switch is moved toanother position. "Engine Start"-A no-load test is performed untilthe switch is moved to another position. "Off"-The automatictransfer controller and engine start contact are disabled. A whitepilot light is provided to indicate that the FPSS is in the "Off" posi-tion.

9B. Maintenance Selector Switch (MSS)

Provides a 2-position, maintained contact selector switch marked"Operate" and "Disable." When the MSS is placed in the "Disable"position, the controller logic will be disconnected from the transfermotor circuit. The MSS is placed in the "Operate" position for nor-mal automatic operation.

Overcurrent Trip Indication

Available only with integral overcurrent protection (Feature 16)(shown on automatic transfer controller display).

12L. Source 1 Trip Indication

The automatic transfer controller display will read "Lockout" if the

Source 1 circuit breaker is in the "tripped" position.

12M. Source 2 Trip Indication

The automatic transfer controller display will read "Lockout" if the

Source 2 circuit breaker is in the "tripped" position.

14C. Source 1 Present

Provides 4 Form C relay auxiliary contacts. The relay is energizedwhen Source 1 is present.

14D. Source 2 PresentProvides 4 Form C relay auxiliary contacts. The relay is energizedwhen Source 2 is present.

16B. Integral Overcurrent Protection on Both Power SourceSwitching Devices

Provides integral overcurrent protection on both Source 1 andSource 2 power switching devices.

16E. Integral Overcurrent Protection on the Source 2 PowerSwitching Device

Provides integral overcurrent protection on the Source 2 powerswitching device.

18. Metering

The ATS controller provides voltage and frequency readings. If

additional metering functions are required, Eaton offers a series ofdigital meters that may be added to the ATS. The meter type canprovide simple current and voltage readings or more capablemeters providing Power, Demand and energy readings. Availablewith an optional communications interface. (See Feature 48- Com-munications for available communication modules.) Feature 18 metering options include all required external devices (CTs, etc.)for a fully functioning metering system.

IQ 130/140/150

IQ 130

This digital meter provides basic current and voltage per phase (L-L, L-N) and min./max. readings (I, V). Optional communication RS-485, Modbus RTU.

IQ 140

In addition to basic current and voltage, will provide frequency,power measurements real, reactive and apparent power, total (W,VAR, VA). Optional communication RS-485, Modbus RTU.

IQ 150

In addition to basic current/voltage/ frequency and power read-ings, will provide Energy Real reactive and apparent (Wh, VAR,Vah). Optional communication RS-485, Modbus RTU.


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IQ 250/260

IQ 250

This digital meter provides current per phase and current demand,voltage (L-L, L-N) and frequency. Power, energy and demand read-ings. Real, reactive and apparent power and energy, power factor.RS-485 communications, Modbus RTU or ASCII. Optional I/O slots

available.

IQ 260

In addition to all of the features of the IQ 250, power quality anal-ysis is available with THD voltage and current per phase.

Power Xpert 2000

Provides either a Power Xpert PXM 2250, PXM 2260 or PXM2270 meter. Power Xpert 4000, 6000, 8000 Provides one of thePower Xpert Meters with or without graphic displays.

18W. Ammeter Side Metering

Provides an ammeter for monitoring the load side circuit. 20A.Rear Bus Provisions Provides Source 1, Source 2 and Load Circuitrear accessible bus stabs with provision for bus bar connection.Eaton transfer switches are provided with either front or rear(dependant on switch type) connected solderless screw-type ter-minals for power cable connection as standard.

21A. Optional Power Cable

Connection Terminals Eaton transfer switches are provided asstandard with Source 1, Source 2 and load circuit solderlessscrew-type terminals for power cable connection. Alternate termi-nal wire sizes, and compression lug provisions may be availabledependant on transfer switch type and ampere rating.

26H. Three-Phase Rotation Protection

Provides three-phase reversal sensing in order to protect againsttransferring to an out-of-phase source. The controller will treat theopposite source as unavailable if the sources are out of phase,based on programmable set points in the controller.

26L. Three-Phase Voltage Unbalance/ Phase Loss

Provides phase loss detection from blown fuses on the Source 1.29J. Automatic Transfer or Automatic

Transfer With Non-Automatic Retransfer Operation Provides afield-selectable programmable set point that permits the transferswitch to operate in one of the following two transfer modes(A or B): A. Fully automatic operation. B. Automatic engine/gener-ator startup and automatic transfer operation from Source 1 toSource 2. Manual pushbutton operation is required to initiate theretransfer operation and engine/generator shutdown. The pushbut-ton for manual retransfer operation is included. This is fail-safeprotected.

29G. Automatic/Manual Operation With Selector Switch

Provides 2-position selector switch (labeled Auto/manual) that per-mits selection of the automatic or manual transfer. When in the"Auto" position, the transfer switch operates with fully automatictransfer, retransfer and generator startup and shutdown opera-tions. When in the "Manual" position, manual operation is requiredto initiate the generator startup or retransfer with generator shut-down operations.

Note: Transfer switches with Feature 29 must be labeled as non-automatictransfer switch equipment.

32B. Load Voltage Decay

Provides load voltage measurement to sense back EMF that isgenerated when the transfer switch is the neutral position. It prvides a delay in transfer in either direction if an unacceptable levis sensed as established by a programmed set point. This is anactive feature that adapts to how the facility is operating in ord

to minimize neutral position wait time, but ensure safety. Adjusable 2-30% of nominal voltage.

32C. In-Phase Transition With Default to Load Voltage Decay

Provides in-phase transition, which is a feature that will permit transfer or retransfer between two available sources that have phase angle difference near zero. The in-phase transition featurincludes permissible frequency difference and synchronizationtime set points. In the event Source 1 and Source 2 fail to syn-chronize within the permitted frequency difference and time, ththe controller defaults to the load voltage decay operation asdescribed in Feature 32B. Adjustable frequency difference 0.0-3Hz. Adjustable synchronization time allowance 1-60 minutes.

32D. In-Phase Transition With Default to Time Delay Neutral

Provides in-phase transition, which is a feature that will permit transfer or retransfer only between two available sources thathave a phase angle difference near zero. The in-phase transitionfeature includes permissible frequency difference and synchronition time set points. In the event Source 1 and Source 2 fail tosynchronize within the permitted frequency difference and timethen the controller defaults to the time delay neutral operation adescribed in Feature 32A. Adjustable frequency difference 0.0-3Hz. Adjustable synchronization time allowance 1-60 minutes.

35A. Pretransfer Signal With 1 Form C Contact

Provides a signal prior to the transferring of the load. Will nottransfer until the programmable delay set point in the controllerreached. If both sources are not available, this option will ignorethe time delay set in the controller.

36. Load Shed From Emergency Provides the capability for anexternal

NC contact to initiate a load circuit disconnection from the Sour2 power source. If the load circuit is connected to Source 2 andthe contact is opened, then a retransfer to Source 1 is completif Source 1 is available. If Source 1 is not available, then the trafer switch will transfer to neutral. If the load circuit is connecteto Source 1 and the contact is open, then a transfer Source 2 iprohibited.

37. Service Equipment Rated Transfer Switch

Provides the label "suitable for use as service equipment" and tfeatures necessary to meet the requirements for the label.Includes service disconnect with visible indication and neutralassembly with removable |link. Feature 16B or 16N must beselected separately.

37A. Service Equipment Rated

Transfer Switch Without Ground Fault Protection Provides servi

equipment rating for an application that does not require groundfault protection.

37B. Service Equipment Rated Transfer Switch With Ground FauProtection

Provides service equipment rating for an application that requireground fault protection.

38. Steel Cover

Provides protection for a device panel as option 38a and protection for the controller as option 38b.


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41. Space Heater With Thermostat

Provides a space heater and adjustable thermostat. External con-trol power is not required. Availability is dependent on transferswitch type.

41E. Space Heater With Thermostat- 375 Watt

Provides 375-watt space heater45. Load Sequencing Capability

Provides the capability for sequential closure of up to 10 address-able relays after a transfer. Each addressable relay provides (1)Form C contact. A single adjustable time delay between each ofthe relay closures is provided. Operates via a sub-network. Adjust-able 1-120 seconds.

45A. Load Sequencing Contact

Provides (1) addressable relay.

45B. Load Sequencing Contact

Provides (2) addressable relays.

45C. Load Sequencing Contact


45D. Load Sequencing Contact


45E. Load Sequencing Contact


45F. Load Sequencing Contact


45G. Load Sequencing Contact


45H. Load Sequencing Contact


45I. Load Sequencing Contact

Provides (9) addressable relays.45J. Load Sequencing Contact


47. Transfer Modes for Closed Transition Transfer Switches

Provides available transition transfer modes for a closed transitiontransfer switch. Closed transition is a "make before break" trans-fer and retransfer scheme that will parallel (a maximum of 100ms) Source 1 and Source 2 providing a seamless transfer whenboth sources are available. The closed transition feature includespermissible voltage difference frequency difference and synchroni-zation time allowance set points. The phase angle differencebetween the two sources must be near zero for a permitted trans-fer. These are all programmable set points in the controller.

47C. Closed Transition With Default to In-Phase Transition With

Default to Load Voltage DecayProvides a closed transition transfer as the primary transfer mode.In the event Source 1 and Source 2 fail to synchronize within thepermitted voltage difference, frequency difference, phase angledifference and time, then the controller defaults to the in-phasetransition with default to load voltage decay operations asdescribed in Feature 32C and 32B. Adjustable frequency differ-ence 0.0-0.3 Hz. Adjustable voltage difference 1-5% volts.Adjustable synchronization time allowance 1-60 minutes.

47D. Closed Transition

Provides a closed transition transfer as the primary transfer mode.Only under a fail-safe condition (i.e., loss of the connected source)will the controller transfer to the alternate source using the loadvoltage decay operation as described in Feature 32B32B. Adjust-able frequency difference 0.0-0.3 Hz. Adjustable voltage differ-

ence 1-5% V.47E. Closed Transition With Default to In-Phase Transition WithDefault to Time Delay Neutral

Provides a closed transition transfer

as the primary transfer mode. In the event Source 1 and Source 2fail to synchronize within the permitted voltage difference, fre-quency difference, phase angle difference and time, then the con-troller defaults to the in-phase transition with default to time delayneutral operation as described in Features 32D and 32A32B32A.Adjustable frequency difference 0.0-0.3 Hz. Adjustable voltagedifference 1-5 percent volts. Adjustable synchronization timeallowance 1-60 minutes.

48. Communication Modules

Provides communications modules for the ATC-600 and ATC-800

transfer switch controllers.48A. INCOM

Communication (IPONI) Provides Eaton's proprietary INCOM pro-tocol communications modules.

48D. Ethernet

Communication (PXG400 Gateway) Translates Modbus RTU,QCPort or INCOM to Modbus TCP. The PXG400 Gatewayincludes embedded Web server monitoring of up to 64 connecteddevices. (Includes the IPONI with the ATC-600 and ATC-800 con-trollers.)

48F. Modbus

Communication (MPONI) Provides Modbus RTU protocol via com-munications module. 48R. Remote Annunciator Provides remotemonitoring of source availability, source position and test status

for the ATC-600 and ATC-800 controllers. Operates via the con-troller sub-network.

48RAC. Remote Annunciator with Control

Provides remote monitoring and control via a color touch screendisplay for the ATC-600 and ATC-800 controllers. Operates usingModbus protocol (MPONI required for the ATC-600 and 800).

Option 51. Surge Protection Device

Two types of surge protection devices are used in Eaton auto-matic transfer switches. Both types meet the requirements for UL1449 3rd Edition for surge suppression devices and are CEmarked. The type CVX is used on Eaton wallmount ATS designsand the Eaton type SPD are used on floor-standing designs.

CVX

The CVX device features a Thermally Protected Metal Oxide Varis-tor technology and comes with high intensity LED phase statusindicators.

SPD

The SPD features a Thermally Protected Metal Oxide Varistortechnology. It comes with dual-colored protection status indica-tors for each phase and for neutral-ground protection mode. Itcomes with an audible alarm with silence button and a Form Ccontact. An optional SPD with surge counter feature package isavailable. This provides six-digit surge counter with reset button.


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51S1B. 50 kA-SPD standard source 1









51S1C. 50 kA-SPD standard with surge counter source 1









54. Front Access

54A. Front access cabinet available for all Magnum products. Thisoption will add an additional pull section mounted on the side ofthe switch.

59b. Tin-Plated Bus

Tin-plated bus is available as an option for Magnum-baseddesigns.

3.7 Enclosure

The rugged steel switch enclosure is supplied with four doorhinges, regardless of enclosure size, to insure proper support ofthe door and door mounted devices. The hinges have removabhinge pins to facilitate door removal. The doors are supplied asstandard with thumbscrew and padlock latches. Cable entry ho

are the customer’s responsibility.The door is used to mount a variety of lights, switches, and pubuttons, depending upon the options required for a particularswitch. All switch doors are supplied with a heavy duty plasticaccessory panel in place, whether or not external devices arerequired. When lights, pushbuttons, or switches are required,they are normally mounted in the plastic door mounted panel.

Transfer switch enclosures and some internal steel mountingplates, such as the transformer panel mounting plate, go througa pre-treatment cleaning system prior to painting to insure a duble finish. Should the enclosure become scratched and in need touch up paint, use ANSI 61. All remaining steel is galvanized.

The standard switch enclosure is NEMA Type 1 for general indouse (Table 4).

Table 4. Transfer Switch Equipment Enclosures.

3.8 Standards

Eaton transfer switch equipment is listed for application by UL aCSA. In addition, Eaton ATSs are listed in File E38116 byUL, Inc., under Standard UL 1008. This standard covers requirments for ATSs intended for use in ordinary locations to providfor lighting and power as follows:

a. In emergency systems, in accordance with articles 517 and700 in the National Electrical Code (NEC), American NationalStandards Institute/National Fire Protection Association(ANSI/NFPA) 70 and the NFPA No. 76A and/or

b. In stand-by systems, in accordance with article 702 of theNEC and/or

c. In legally required stand-by systems in accordance with artic701 of the NEC.

d. In critical operations power systems (COPS article 708) inaccordance with article 708 of the NEC

Eaton ATSs are available to meet NFPA 110 for emergency andstand-by power systems, and NFPA 99 for health care facilitieswhen ordered with the appropriate options.

Since Eaton ATSs utilize specially designed switches and/orswitching devices as the main power switching contacts, thesedevices must also be listed under the additional UL Standard1066. UL utilizes two basic types of listing programs: a) LabeService and b) Re-examination. UL1066 employs a label serviclisting program which requires an extensive follow-up testing prgram for listed devices. Standard UL1008 for ATSs lists devicunder the re-examination program which only requires a continuphysical re-examination of the components used in the product insure consistency with the originally submitted device. Follow-testing IS NOT required by UL1008.

Representative production samples of switches and switchingdevices used in Eaton ATSs are subjected to a complete test prgram identical to the originally submitted devices on an ongoingperiodic basis per UL1066. The frequency of such a re-submitcan be as often as every quarter for a low ampere device.

NEMA TYPE DESIGN PROTECTION

1 Indoor Enclosed Equipment

3R Outdoor Rain, Ice Formation


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Section 4: Installation and Wiring

4.1 General

Eaton transfer switches are factory wired and tested. Installationrequires solidly mounting the enclosed unit and connecting thepower cables and auxiliary pilot circuits. Physical mounting proce-

dures and power cable connections are covered in this section.All other required wiring or electrical connection references arecovered in a separate Customer Wiring Diagram packaged withthe transfer switch.

Locate the wiring booklet, review it, and keep it readily availablefor reference purposes during installation and testing. Once atransfer switch is properly installed and wired, it should bemechanically and electrically checked for proper installation andoperation. The procedures for these initial mechanical and electri-cal checks are outlined in Section 8.1 of this instruction manual.

4.2 Mounting Location

Choose a location that offers a flat, rigid mounting surface capa-ble of supporting the weight of the enclosed transfer switchequipment. Avoid locations that are moist, hot, or dusty. How-ever, Eaton offers enclosure designs that can be used in specialenvironments. If there are any doubts as to the suitability of thelocation, discuss it with your Eaton representative.

Check to make certain that there are no pipes, wires, or other haz-ards in the immediate area that could create a problem. The pan-els provide ample room for rear cable entry from top, bottom, andsides. At no time should cable be routed to retard the action of

relays or cover the logic in a way that restricts adjustments.Maintain proper electrical clearances between live metal parts andgrounded metal.

For installation and maintenance purposes, the Source 1 andSource 2 power sources must have an overcurrent protectivedevice upstream of the transfer switch, unless overcurrent protec-tion is integral to the switch.

The dimensions of the transfer switch are an important consider-ation in determining proper location selection.

4.3 Unpackaging and Inspection

Proceed with the following four steps:

Step 1: Carefully uncrate the transfer switch. If damage is visible,please contact your local Eaton sales representative or thefactory.

Step 2: Open the door and visually verify that there are no brokenor damaged components or evidence of distorted metal orloose wires as a result of rough handling.

Step 3: A label on the door provides specifications for your trans-fer switch. Verify that these specifications comply withyour requirements.

Step 4: Remove any braces or packing used to protect the trans-fer switch or internal components during shipping.

WARNING

BE CERTAIN THAT THE SOLID STEEL DEAD FRONT SHIELDS AREPROPERLY INSTALLED BEFORE THE TRANSFER SWITCH EQUIP-

MENT IS PUT INTO SERVICE. THE SHIELD PROVIDES PROTECTIONFROM DANGEROUS VOLTAGES AT THE LINE AND LOAD TERMI-NALS WHEN THE EQUIPMENT IS IN OPERATION. FAILURE TO DOSO COULD RESULT IN PERSONAL INJURY OR DEATH.

CAUTION

SINCE THE ENCLOSED TRANSFER SWITCH MUST BE LIFTED INTOPLACE FOR MOUNTING, BE CERTAIN THAT ADEQUATE RESOURCESARE AVAILABLE FOR LISTING TO AVOID PERSONNEL INJURIES OREQUIPMENT DAMAGE.

CAUTION

EXTREME CARE SHOULD BE TAKEN TO PROTECT THE TRANSFERSWITCH FROM DRILL CHIPS, FILLINGS, AND OTHER CONTAMI-NANTS WHEN MAKING THE CABLE ENTRY HOLES AND MOUNTINGTHE ENCLOSURE TO PREVENT COMPONENT DAMAGE OR AFUTURE MALFUNCTION.


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4.4 Mounting Procedure

With the enclosed transfer switch equipment unpacked and readyfor mounting, proceed with the following steps:

Step 1: Mounting and cabling access is best provided by remov-ing side and rear covers (when applicable). See Section9.3 for cover removal instructions.

Step 2: Gently maneuver the switch into its location using all ofthe supplied lift brackets.

Step 3: Bolt the enclosure to the base. Use separate cleats(Option 42 only) if Seismic Uniform Building Code (UBC)Zone 4 certification is desired (Figure 20), and securewith 1/2-13 UNC Grade 5 hex bolts. Seismic per IBC2009, CBC2010, OSHPD OSP-0014-10 (3200 A and

below)

Step 4: Tighten bolts to 50 ft-lbs (68 Nm).

Step 5: Double check to ensure that all packing and shippingmaterial has been removed

.

Figure 20. Seismic Tested and Approved Product MountingInstructions.

4.5 Power Cable Connections

Test all power cables prior to connection to the unit to ensure ththe conductors or cable insulation have not been damaged whil

being pulled into position.Power cables are to be connected to solderless screw type lugslocated on the ATS switching devices. Refer to the separate ctomer wiring diagram supplied with the ATS equipment for powtermination. Verify that the lugs supplied will accommodate thpower cables being used. Also verify that the cables comply wlocal electrical codes. Standard ATS equipment, as supplied frothe factory, will accommodate the wire sizes shown in Table 5

Carefully strip the insulation from the power cables to avoid nicing or ringing of the conductor strands. Prepare the stripped coductor termination end by cleaning it with a wire brush. Ifaluminum conductors are used, apply an appropriate joint com-pound to the clean conductor surface area.

Wrap line cables together with nominal 3/8 inch nylon rope or

rope having tensile strength of 2,000 pounds.Wrap at 4 inches and 15 inches from the line terminals with 8 a18 wraps respectively or every 1 inch with 1 wrap.

Repeat the above for the load cables.

NOTICE

CABLE ENTRY HOLES ARE NOT PART OF THE ENCLOSURE WHENSHIPPED FROM THE FACTORY AND MUST BE PROVIDED IN THE

FIELD, EITHER BEFORE OR AFTER MOUNTING THE ENCLOSURE.

WARNING

POWER CONDUCTORS MAY HAVE VOLTAGE PRESENT THAT CANCAUSE SEVERE PERSONAL INJURY OR DEATH. DE-ENERGIZE ALL

POWER OR CONTROL CIRCUIT CONDUCTORS TO BE CONNECTEDTO THE TRANSFER SWITCH EQUIPMENT BEFORE BEGINNING TOWORK WITH THE CONDUCTORS AND/OR TERMINATING THEM TOTHE EQUIPMENT.

CAUTION

USE OF CABLE LUGS NOT DESIGNED FOR THE TRANSFER SWITCAPPLICATIONS MAY CAUSE HEATING PROBLEMS. BREAKER LUGONLY MOUNT TO THE BREAKER, WHILE TRANSFER SWITCH LUGSMOUNT TO BOTH THE BREAKER AND THE BUS BAR BEHIND THEBREAKER. FOR INSTALLATION INSTRUCTIONS, REFER TO THEINSTRUCTION LEAFLET SUPPLIED FOR THE SPECIFIC LUGS.

CAUTION

TO HELP PREVENT COMPONENT DAMAGE OR FUTURE MALFUNCTIONS, USE EXTREME CARE TO KEEP CONTAMINANTS OUT OF THTRANSFER SWITCH EQUIPMENT WHEN MAKING POWER CABLECONNECTIONS.

CAUTION

RUN THE POWER CABLE THROUGH THE GUTTER SPACE PROVIDEIN THE REAR OF POWER COMPARTMENTS.


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Figure 21. Cable Bracing Instructions.

Tighten the cable lugs to the torque identified on the label affixedto the door.

Proceed with the following steps:

Step 1: Verify that the line and load cables comply with applica-ble electrical codes.

Step 2: Verify that the transfer switch rated current and voltage(see identification plate on the door of the transfer

switch) agree with system current and voltage.Step 3: After the transfer switch is mounted, provide the conduit

or cable openings as required. Ensure that no metal filingscontaminate the transfer switch components.

Step 4: Test all power cables before connecting them to the unitto insure that the conductors or the cable insulation havenot been damaged while being pulled into position.

Step 5: Carefully strip the insulation from the power cables.Avoid nicking or ringing of the conductor strands. Pre-pare the stripped conductor termination end by cleaningit with a wire brush. If aluminum conductors are used,apply an appropriate joint compound to the clean conduc-tor surface area. Refer to Figure 13 for the approximatelocations of the power connections.

Table 5. Wire Size for Available Power CableConnections.

Step 6: Make the necessary connections of any options using thewiring diagrams supplied with the unit.

Step 7: Connect the engine start wires to the logic connectorJ5-1 & J5-2 on the ATC-600/ATC-800 Controller.

CAUTION

IMPROPER POWER CABLE CONNECTIONS CAN CAUSE EXCESSIVEHEAT AND SUBSEQUENT EQUIPMENT FAILURE.

DEVICE SWITCH

RATING

(AMPS)

CABLES

PER

PHASE

RANGE

WIRING SIZE

Switch 800-2000 6 3/0-750 MCM

Switch 2500-3200 9 3/0-750 MCM

Switch 4000 10 3/0-750 MCM

Switch 5000 12 3/0-750 MCM

Neutral 800-2000 24 4/0-500 MCM

Neutral 2500-3200 36 4/0-500 MCM

Neutral 4000 48 4/0-500 MCM

Neutral 5000 48 4/0-500 MCM


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4.6 Voltage Selection Adjustment

Certain devices, such as the voltage selection panel, sensingrelays, and timers need to be set and/or calibrated prior to placingthe transfer switch equipment into service. Adjustments for logicdevices are described in the separate instructional document dedi-cated to the specific logic being used. Voltage selection adjust-

ments are described here

Voltage selection is made at the multi-tap transformer subassembly (see figure 22.A) mounted in the lower compartment of thetransfer switch. This subassembly includes two identical contrpower transformers with one connected to Source 1(NT1) and tother connected to Source 2 (ET1). The control power transfoers are mounted behind a removable panel (See Figure 22.B)

Figure 22. Voltage Selection Adjustment.

Figure 22A.

Figure 22B.

• Remove the transformer pack cover by loosening the 4 screwlocated at each corner of the transformer pack assembly.

• The transformers are factory set on the voltage tap specified the customer. (See illustration above for location of varioustaps and voltages)

• Detach the spade connector from the existing voltage tap anplace on the tap that is suitable for your application.

.

• After changing the taps on both transformers, replace the traformer pack cover and tighten all four screws.

PRIMARY

TERMINALS

SECONDARY

TERMINALS

415V 6

380V 5

240V 4

220V 3

208V 2

0V 1

50/60Hz

12

11

10

9

SECONDARY 1

120V, 300VA

INTERMITTENT 50%

DUTY CYCLE

SECONDARY 2

120V, 25VA

7

910

1112

1 2 0 V , 2 5 A

1 2

1 1

9

1 0 1 2 0 V 3 0 0 V A

T O P : 7 - 4 8 0 V 5 - 3 8 0 V 3 - 2 2 0 V 1 - C O M M O N

B O T T O M : 8 - 6 0 0 V 6 - 4 1 5 V 4 - 2 4 0 V 2 - 2 0 8 V

5

3

86

4

480V 7

600V 8

1

2

Primary Side Connections:

Connection 1 - Tap on #1 Common

Connection 2 - Tap on the nominalsystem voltage

WARNING

DISCONNECT ALL SOURCES OF POWER OR DISCONNECT P7/S7PRIOR TO PERFORMING THE FOLLOWING. FAILURE TO DO SO MACAUSE SERIOUS INJURY OR DEATH.

CAUTION

BE SURE THAT THE CORRECT VOLTAGE IS SELECTED TO MATCHTHE SYSTEM VOLTAGE. AN IMPROPER SELECTION AND/OR CONNECTION COULD RESULT IN EQUIPMENT DAMAGE.


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4.7 Control Wiring to Magnum Power Case Switch/

Breaker

Control connections to the magnum power case switch can bemade to the terminal blocks mounted above each device. Thedead front needs to be removed first to gain access to the terminallocations. Typically the Source 1 (Normal) is the upper powerdevice and Source 2 (Emergency) is the lower power device. Theterminals are numbered the same for each one and also the samefor fixed mounted or drawout designs. An example of the auxil-iary contacts is shown in typical drawing below.

4.8 Wiring

Power sources, load conductors, and control wiring should beconnected to locations as indicated in the Customer Wiring Dia-grams supplied with the transfer switch equipment.

4.8.1 Engine Start Connection

The engine control contact connections are located on theATC-600/ATC 800 Controller. The engine control contact con-nections of bypass isolation units are located in the door of theenclosure.

Note: Prior to making the engine start connection to the switch on bypassisolation units, set the engine generator controls selector switch in the OFFposition to prevent an unwanted engine start. A contact closes betweenthese terminal blocks when an engine start signal is provided by the ATSlogic.

4.8.2 ALARM CONTACTS (CLOSED TRANSITION ONLY)

Closed transition only ATSs are provided with an extra shunt tripon the Source 1 device. This shunt trip is energized when theTime Delay Utility Parallel (TDUP) times out (preset by user), thusopening the source device. The TDUP timer starts timing whenboth sources are paralleled. Refer to the IQ Transfer instructionbook for additional alarms.

Figure 23. Terminal Blocks Mounted Above Each Device.

S1A29

S1A30

S1B25

S1B18

S1B19

S1B20

S1B21

S1B24

S1B25

S1B23

S1B26

S1B27

S2A29

S2A30

S2B25

S2B18

S2B19

S2B20

S2B21

S2B24

S2B25

S2B23

S2B26

S2B27

POSITION INDICATION CONTACTS SOURCE 1/SOURCE 2 ATS

CAUTION

POWER CONDUCTORS AND CONTROL WIRING MAY HAVE VOLT-AGE PRESENT THAT CAN CAUSE SEVERE PERSONAL INJURY ORDEATH. DE-ENERGIZE ALL POWER OR CONTROL CIRCUIT CONDUC-TORS BEFORE BEGINNING TO PERFORM ANY WIRING ACTIVITY TOOR WITHIN THE TRANSFER SWITCH EQUIPMENT.


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Section 5: Operation

5.1 General

A transfer switch provides main contacts to connect and discon-nect the load to and from the Source 1 and Source 2 powersources. A stored-energy type transfer mechanism provides themechanical motion required to open and close the main contacts(Paragraph 3.2.1).

Each switch can be manually operated. Before a switching devicecan be closed, the stored energy mechanism must be charged bypumping the handle (Figure 24).

Figure 24. Pumping Handle Charges Stored Energy Mechanism(Closed Transition Shown).

In the closed transition product, a single switching device can bemanually closed by following the instructions detailed in Figure26. An indicator window shows whether the switch is open orclosed.

The open transition switching device can be closed by pushing theclose button (Figure 25). The other switching device is preventedfrom closing through a rigid mechanical interlock (Paragraph3.2.2). An indicator window shows whether the switch is openor closed.

Figure 25. Close Switch by Pushing Close Button.

5.2 Automatic Transfer Switch

The operating sequence of an ATS is dictated by the switch’sstandard features and selected options. Operation of an ATS ding Source 1 power source failure, Source 1 power source restotion, and testing is described in the associated ControllerInstruction Booklet.

WARNING

THE CLOSED TRANSITION PRODUCT CONTAINS A SPECIAL CON-TACT ARRANGEMENT (OVERLAPPING CONTACTS). MISUSE CANRESULT IN DEATH, SEVERE PERSONAL INJURY, AND/OR PROPERTYDAMAGE.

NOTICE

IF A TRANSFER SWITCH WITH ANY TYPE OF ELECTRICAL OPERATING CAPABILITIES IS TO BE OPERATED MANUALLY UTILIZING THEMANUAL OPERATING HANDLE, IT IS STRONGLY RECOMMENDEDTHAT THE TRANSFER CONTROL CIRCUIT FIRST BE ISOLATED. THIS ACCOMPLISHED BY DISCONNECTING THE S7/P7 PLUG ON THETRANSFORMER PANEL. AN AUTOMATIC ENGINE START WILLOCCUR UNLESS THE GENERATOR RUN SWITCH SET TO “OFF.” IFHOWEVER, A TRANSFER SWITCH IS SUPPLIED WITH A FOUR-POSTION SELECTOR SWITCH (OPTION 6H), IT CAN BE TURNED TO THOFF POSITION, MAKING IT UNNECESSARY TO UNPLUG THE LOGICIN THE CASE OF THE ATS DESIGN, ANY ATTEMPT TO OPERATETHE MANUAL HANDLE WITHOUT FIRST ISOLATING THE CONTROCIRCUIT CAUSES AN AUTOMATIC TRANSFER.


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Figure 26. Switching Device Closing Precautions (Closed Transition Only).

Follow Manual Operation Instructions Below

switching devices simultaneously

can cause severe injury

Attempting to close both

or death.

WARNING

2. Open both switching devices

Manual Operation Instructions

4. Verify source availability5. Close switching device on available

source

1. Disconnect Logic Connectors

3. Verify "OPEN" flags

7805C60H05

MANUAL CLOSE BUTTON

Operating Instructions

Do Not Use WithoutReading Manual

OVERLAPPING CONTACTS

must be Synchronized

SOURCE 1 AND SOURCE 2

WARNING

7805C60H04

THIS PRODUCT CONTAINS A SPECIAL CON-

TACT ARRANGEMENT (OVERLAPPING CON-

TACTS). MISUSE CAN RESULT IN DEATH

SEVERE PERSONAL INJURY OR PROPERTY

DAMAGE.

(THIS LABEL IS APPLIED TO THE DOOR )

FOLLOW THE INSTRUCTIONS

OUTLINED IN THE NEXT

WARNING LABEL.

(THIS LABEL IS APPLIED TO

THE COVER OF THE MANUAL

CLOSE BUTTON ON EACH

THESE INSTRUCTIONS ONLY PERTAIN TO

MANUALLY CLOSING A SINGLE SWITCHING

DEVICE. ATTEMPTING TO CLOSE BOTH

SWITCHING DEVICES CAN CAUSE SEVERE

INJURY OR DEATH.

THIS LABEL IS APPLIED TO THE DOOR.


27/44




Section 6: Drawout and Fixed SwitchingDevices

6.1 Installing a Drawout Switching Device

In transfer switches equipped with drawout switching devices,bolted-in carriages with extendable rails support the switchingdevices.

Figure 27. Switching Device Drawn Out from the Transfer Switch.

To install a drawout switching device, the extendable rails mustfirst be pulled all the way out. Once the rails are fully extended,the switching device can be carefully placed on the rails.

Figure 28. Drawout Rail Supports Fully Seated in the RailCutouts.

Carefully lower the switching device onto the extended rails. Becertain that the switching device’s four molded drawout rail supports are fully seated in the extendable rail cutouts on both side(Figure 29). Do not remove the lifting yoke from the switchingdevice until it is properly seated on the rails.

Figure 29. Switching Device in the REMOVE Position.

Once the switching device is properly seated on the extendedrails, the lifting yoke can be removed and the rest of the switchidevice installation procedure can be completed.

6.1.1 Switching Device Positioning

The Magnum drawout switching device has four normal positio

• REMOVE (Withdrawn) (Figure 29)

• DISCONNECT (Figure 32)

• TEST (Figure 31)

• CONNECT (Figure 30)

The REMOVE position is a position outside the compartment onthe carriages drawout rails where the switching device is notengaged with the levering mechanism. The DISCONNECT, TESand CONNECT, positions are reached by means of the leveringmechanism.

With the switching device solidly positioned on the carriage’sextendable rails and the levering-in mechanism in theDISCONNECT position, carefully and firmly push the switchingdevice into the compartment as far as it will go. The outer(recessed) portion of the switching device face plate should aligwith the GREEN target line (labeled DISC) on the inside top leftwall of the carriage (Figure 33).

CAUTION

IT IS IMPORTANT TO TAKE GREAT CARE WHEN PLACING A DRA-WOUT SWITCHING DEVICE ON ITS EXTENDED RAILS. IF THE

SWITCHING DEVICE IS NOT PROPERLY SEATED ON THE EXTEND-ABLE RAILS, IT COULD FALL FROM THE RAILS CAUSING EQUIP-MENT DAMAGE AND/OR BODILY INJURY.

CAUTION

MAKE CERTAIN THAT THE SWITCHING DEVICE IS FULLY INSERTE

INTO ITS COMPARTMENT BEFORE ANY ATTEMPT IS MADE TOLEVER THE SWITCHING DEVICE. ATTEMPTING TO LEVER THESWITCHING DEVICE IN BEFORE IT IS FULLY POSITIONED INSIDE ITCOMPARTMENT CAN RESULT IN DAMAGE TO BOTH THE SWITCHING DEVICE AND THE COMPARTMENT.


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Figure 30. Switching Device in the CONNECT Position.

Figure 31. Switching Device in the TEST Position.

Figure 32. Switching Device in the DISCONNECT Position.


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Figure 33.Carriage Label Showing DISCONNECT, TEST, andCONNECT Positions of the Recessed Cover.

6.1.2 Levering the Switching Device

The switching device is now ready to be levered. With theswitching device OPEN, the levering device access door can beraised. The levering device is hand operated using a standard3/8” square drive and ratchet, which is not provided (Figure 34).As long as the access door is raised, the switching device is heldin the “trip free” condition. Begin by rotating the levering-in screwto the full counter clockwise (DISCONNECT) position.

Figure 34.Levering and Position Indication.

Close the compartment door and begin levering the switchingdevice into its different positions using a clockwise ratchetingmotion. When the switching device is levered fully to theDISCONNECT or CONNECT position, the levering shaft hits a hardstop. Do NOT exceed 25 ft lb (33.9 Nm) of torque or the leveringmechanism may be damaged.

The position of the switching device within its compartment isindicated by color coded position indicators (SeeFigure 30 through 33):

• Red=Connect;

• Yellow=Test; and

• Green=Disconnect.

To remove the switching device from its compartment, follow tprocedure just described using a counter clockwise ratchetingmotion.

6.2. Fixed Switching Device

The Magnum fixed type switching device differs from the drawoversion in that it has no levering device, primary disconnects, asecondary disconnects (Figure 35). In addition, a fixed switchidevice does not have a standard feature to hold the switchingdevice in a “trip free” position

Figure 35. Typical Magnum Fixed Switching Device.

Fixed switching device terminals have holes for making bolted hizontal primary bus connections. Adapters are available for maing vertical primary bus connections. Secondary connections cbe made through standard terminal blocks or a special connectocompatible with the drawout switching device’s type secondaryconnector. Both secondary connection devices are mounted atthe top front of the switching device.

Red

Yellow

Green

NOTICE

THE SWITCHING DEVICE CAN BE LEVERED WITH THE COMPART-MENT DOOR OPEN OR CLOSED, BUT IT IS ADVISABLE TO CLOSETHE DOOR PRIOR TO LEVERING.

NOTICE

THE SWITCHING DEVICE MECHANISM IS INTERLOCKED SUCHTHAT CHARGED CLOSING SPRINGS ARE AUTOMATICALLY DIS-CHARGED IF THE SWITCHING DEVICE IS LEVERED INTO OR OUT OTHE CELL. DISCHA

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