Over and Underfrequency 81O/U O/U O/UDifferential, Restricted Ground Fault 87RGF O
Differential, Transformer 87T
– Maximum Number of Windings 4 3 6 4– Typical Operating Time (Cycles) 1-2 2-3 1-2 1-2– Dual Slope Characteristic
– Harmonic Restraint
– Internal Winding Phase Shift Compensation
– Dynamic CT Ratio-Matching
– CT Mismatch Range 8/1 16/1 32/1 32/1– Unrestrained Operation
FlexElements™
Power Supply, AC OR DC DC AC/DC AC/DC AC/DCCT Inputs 5/1A 5/1A 5/1 5/1ASelf-Test Failure Contact
Settings Groups 3 4 8 8Flash Memory
Contact Inputs (Fixed) – up toContact Inputs (Programmable) – up to 7 16 48 80Contact Outputs (Fixed) – up to 5Contact Outputs (Programmable) – up to 8 8 24 40Virtual Inputs
Virtual Outputs
Display
Keypad
Trip/Close Coil Supervision O OProgrammable Logic
User-Programmable LEDs
Timers
Digital Counters
Digital Elements
IRIG-B Input
Analog Outputs 7(O)Tap position Indication
Current – RMS
Current – Phasor
Current – Demand
Voltage – RMS
Voltage – Phasor
Power Factor
Symmetrical Components
Harmonics
Total Harmonic Distortion (THD)
RTDs 1 O OMW, MVA, Mvar
Frequency
Analog Inputs 1(O) O OFault Report
Event Recorder
Oscillography (Waveform Capture)
Interface Program
RS232 Port
RS485 Port O 1/2 1/2Baud Rate 115k 19.2k 115k 115k10 BaseF Port 0/1/2 0/1/2ModBus® Protocol O
ModBus® User Map O
DNP3 Protocol
UCA2/MMS Protocol
TCP/IP
Loss-of-Life Calculation OAmbient Temperature from RTD
VA MVA
TRANSFORMER Selector Guide
“O” optionT35
61
4
65
4
UR Transformer Management RelayTM
Features and Benefits
FlexLogic™ and distributed FlexLogic™
Virtual and expandable I/Os to reducehardware costs
User-programmable LEDs
User-definable display messages
Flash memory for field upgrades
Common drawout modules to reducespare parts costs
Diagnostic features – event recording,oscillography and data logging
Multiple settings groups
Applications
Reliable primary and backup protectionfor multi-winding power transformers
enerVista.com compatible (see page 275)
Protection and Control
Dual slope percent differential characteristic
Instantaneous differential protection
Overexcitation protection
Restricted ground fault protection
FlexElement™ universal comparators
Monitoring and Metering
Current, voltage, power, power factorand frequency
Differential and restrained currents
Percent second and fifth harmonics
Per-phase second and 25th harmonics oncurrents and THD
User Interfaces
URPC software for setting, monitoring
RS232, RS485 and Ethernet ports
High-speed, three-phase,
multiple winding transformer relay.
GE Multilin
Protection andControlThe T60 Transformer ManagementRelay, is a three-phase, multiplewinding, transformer relay intendedfor the primary protection of anysize of power transformer. Auto-matic ratio and phase anglecompensation for all commontransformer winding connectionssimplifies application (CT con-nected in wye). Algorithm enablesapplication of the relay to trans-formers with in-zone cableconnections or other in-zonegrounded devices.
As part of the Universal RelayFamily, the T60 provides superiorprotection which includes:
Percent Differential Protection
Dual-slope dual break-point oper-ating characteristic with magneti-zing inrush and overexcitationinhibits integrated. Percent differential restraint operatingcharacteristics.
a) Adaptive Inrush Inhibit
The T60 utilizes the phase anglerelation between the second har-monic and the fundamentalfrequency in addition to theirmagnitude ratio to allow the algorithm to shape the block/operate characteristic of the in-rush detector more efficiently,maximizing performance on in-ternal faults and ensuringsecurity during inrush conditionseven with a weak second har-monic.
The algorithm requires the userto set the second harmonicthreshold.
Operating region for the new decision signal.
b) Overexcitation Inhibit
Integrated with percent differen-tial protection.
Instantaneous Differential
Fast protection against heavy in-ternal faults.
Overexcitation Protection
Protection via Volts/Hertz function.
Restricted Ground Fault
Protection against internal low-current ground faults.
Overcurrent Protection
IOC and TOC functions are avail-able for phase, ground andneutral currents. A variety of timecurves are provided includingthree IEEE, four IEC, four GE IAC,I2t, definite time and two user-programmable curves.
T60 UR Transformer Management RelayTM
www.GEindustrial.com/Multilin66
4
0 2 4 6 8 10 12 14 16Restraint Current
Dif
fere
nti
al C
urr
en
t
0.0005.000
10.00015.00020.000
30.00025.000
35.000
t60operating.ai
TransitionRegionSlope 1
BP# 1
BP# 2
Slope 2
90
60
30
120
150
0
330
300
270
240
210
180
C2C2
C3C3
C1C1
OPERATE
T60 diagram2.w
828713AD.CDR
Winding 2
Amps Amps
50/87
87TBlock
3 3
CalculateRestraint Amps
CalculateOperate Amps
Metering
CalculateHarmonics 2&5
HarmonicRestraint
TYPICAL CONFIGURATIONTHE AC SIGNAL PATH IS CONFIGURABLE
59N 24
Winding 1
HarmonicsHarmonics Amps Amps
51N-1
50N-1
51N-2
50N-2
Calculate3I_0
Calculate3I_0
Amps
50P-2
51P-2
50P-1
67P
51P-1
67N3V_0
50G-1
51G-1
87G-1
50G-2
51G-2
87G-2
Amps Amps Amps
59P 27P 59X
27X
T60 Transformer Management Relay
81 U 81 O
Transducer Input FlexElement™
Functional Block Diagram
T60 UR Transformer Management RelayTM
www.GEindustrial.com/Multilin 67
4
Typical Wiring
828712AB.CDR
T60 UR TRANSFORMER
MANAGEMENT RELAY
CONTACTS SHOWNWITH NO
CONTROL POWER
(Rear View)
1
PowerSupply
8
CT
6
I/O*
6
I/O*
6
I/O*
6
I/O*
6
I/O
9
CPU
MODULE ARRANGEMENTJU MX LW KV BHT DN GS P FR
TC
TC
2
1
VO
LTA
GE
SU
PV
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OLT
&C
UR
RE
NT
SU
PV
.
CONTACT IN 7aCONTACT IN 7cCONTACT IN 8aCONTACT IN 8c
COMMON 7b
8a
7b
7aH
H
H
H
H
HHHHH
H
HH
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
8c
7c 1b
2b
3b
4b
5b
6b
1a
2a
3a
4a
5a
6a
1c
2c
3c
4c
5c
6c
SURGE8b
1
5
2
6
3
4
DIGITAL I/O 6H I
V
I
V
I
V
I
V
I
V
I
V
CRITICALFAILURE
48 VDCOUTPUT
CONTROLPOWER
HIMED
LO
PO
WE
R S
UP
PLY
1
FILTERSURGE
5a
3a
1b
8a
6b
8b
6a
B
B
B
B
B
B
B
B
B
B
B
3b
1a
2b
5b
GE Multilin
9A
COM
COM
C
PU
D3b
D4b
D5b
D2a
D3a
D4a
D5a
D6a
D7b
RS485COM 1
RS485COM 2
IRIG-B
SURGE
Ground atDevice end
Shieldedtwisted pairs
GROUNDBUS
No. 10AWGMinimum
AC or DC
DC
( D
C O
NLY
)
7c
8c
8b
8a
5c
5a
5b
7b
3c
4b
4a
4c
1c
6a
2b
7a
2a
6b
6c
2c
1a
1b
3a
3b
8C / 8DCURRENT INPUTS
FFFFFFFFFFFFFFFFFFFFFFFF
IA IB IC IGIA5
IA1
IB5
IC5
IG5
IB1
IC1
IG1 IA IB IC IGIA5
IA1
IB5
IC5
IG5
IB1
IC1
IG1
WIN
DIN
G 2
WIN
DIN
G 1A A
B BC C
TYPICAL CONFIGURATIONTHE AC SIGNAL PATH IS CONFIGURABLE
(5 amp CTs)(5 amp CTs)
6C
DIG
ITA
L I/O
1
5
2
6
3
7
4
8
7a
1a
2b
7c
1c
7b
1b
8c
P
PP
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
8b
2c
8a
2a
4a
5b
4c
6b
3b
3a
6a
4b
5c
5a
3c
6c
7a
1a
2b
7c
1c
7b
1b
8c
M
MM
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
8b
2c
8a
2a
4a
5b
4c
6b
3b
3a
6a
4b
5c
5a
3c
6c
6KD
IGIT
AL
I/O
1
5
2
6
3
7
4
8
CONTACT IN 5a
CONTACT IN 7a
CONTACT IN 5c
CONTACT IN 7c
CONTACT IN 6a
CONTACT IN 8a
CONTACT IN 6c
CONTACT IN 8c
COMMON 5b
COMMON 7b
SURGE
6a
8a
5b
7b
8b
5aW
W
W
W
W
W
W
W
W
W
W
WWWWW
WWWWW
W
WW
W
W
W
W
W
W
W
W
W
W
W
W
W
7a
6c
8c
5c
7c
6A1
2
3
4
1a
2b
1c
1b
2c
2a
4a
4c
3b
3a
4b
3c
DIGITAL I/O I
V
I
V
* Optional
MODULES MUST BEGROUNDED IF TERMINAL IS
PROVIDED
6a
8a
5b
7b
5a
7a
6c
8c
5c
7c
CONTACT IN 1a
CONTACT IN 4c
COMMON 5b
COMMON 7b
COMMON 1b
CONTACT IN 2a
CONTACT IN 5a
CONTACT IN 3c
CONTACT IN 6a
CONTACT IN 8a
CONTACT IN 1c
CONTACT IN 3a
CONTACT IN 5c
CONTACT IN 7cCONTACT IN 7a
CONTACT IN 2c
SURGE
CONTACT IN 4a
CONTACT IN 6c
CONTACT IN 8c
1a
8b
4c
2c
3a
3c
1c
3b
1b
4a
2a
6DD
IGIT
AL
I/O
U
U UU UU UU U
U UU UU UU UU
U UU UU UU UU U
U UU UU UU UU UU
U
COMMON 3bUUR COMPUTER
1 1 832
20764522
25 PINCONNECTOR
PERSONALCOMPUTER
9 PINCONNECTOR
2 23 34 45 56 67 78 89 9
TXD RXDRXD TXD
SGND SGND
RS-232
DB-9
(front)
T60 UR Transformer Management RelayTM
www.GEindustrial.com/Multilin68
4
Ordering
T60 * 00 HC * F** H** M** P** U** W** For full sized horizontal mountT60 * 00 VF * F** H** M** P** For reduced size vertical mount T60 Base unit
A RS485 + RS485 (ModBus® RTU, DNP) CPU C RS485 + 10BaseF (MMS/UCA2, ModBus® TCP/IP, and DNP) CPUD RS485 + redundant 10BaseF (MMS/UCA2, ModBus® TCP/IP, DNP) CPU
00 No software optionsHC Horizontal mount (19" rack) VF Vertical mount (3/4 size)
XX XX XX XX No module6A 6A 6A 6A 6A 2 Form A (voltage w/ opt current) and 2 Form C outputs, 8 digital inputs6B 6B 6B 6B 6B 2 Form A (voltage w/ opt current) and 4 Form C, 4 digital inputs6C 6C 6C 6C 6C 8 Form C outputs6D 6D 6D 6D 6D 16 digital inputs6E 6E 6E 6E 6E 4 Form C, 8 digital inputs6F 6F 6F 6F 6F 8 Fast Form C outputs6G 6G 6G 6G 6G 4 Form A (voltage w/ opt current) outputs, 8 digital inputs6H 6H 6H 6H 6H 6 Form A (voltage w/ opt current) outputs, 4 digital inputs6K 6K 6K 6K 6K 4 Form C, 4 fast Form C outputs6L 6L 6L 6L 6L 2 Form A (current w/ opt voltage) and 2 Form C outputs, 8 digital inputs
6M 6M 6M 6M 6M 2 Form A (current w/ opt voltage) and 4 Form C outputs, 4 digital inputs6N 6N 6N 6N 6N 4 Form A (current w/ opt voltage) outputs, 8 digital inputs6P 6P 6P 6P 6P 6 Form A (current w/ opt voltage) outputs, 4 digital inputs6R 6R 6R 6R 6R 2 Form A (no monitoring) and 2 Form C outputs, 8 digital inputs6S 6S 6S 6S 6S 2 Form A (no monitoring) and 4 Form C outputs, 4 digital inputs6T 6T 6T 6T 6T 4 Form A (no monitoring) outputs, 8 digital inputs6U 6U 6U 6U 6U 6 Form A (no monitoring) outputs, 4 digital inputs5C 5C 5C 5C 5C 8 RTD inputs5E 5E 5E 5E 5E 4 DCmA inputs, 4 RTD inputs select a maximum of 45F 5F 5F 5F 5F 8 DCmA inputs
™ Transformer Management Relay is a registered trademark of GE Multilin.
Directional Overcurrent Protection
Phase and neutral (forward and reverse) directional elements areavailable.
Voltage Protection
Over and undervoltage protectionprovided. Computed neutral volt-age used for neutral overvoltageelement.
Frequency Elements
Four over and six underfrequencyelements are provided for high fre-quency or load shedding protection.
User-Definable Protection
Functions
The T60 relay contains 16 univer-sal comparators (FlexElements™)
T60 GuideformSpecificationsFor the T60 guideform specifica-tions, visit: www.GEindustrial.com/Multilin/specs, fax your request to 905-201-2098 or email to [email protected].
that can be programmed to respond to changes in any meas-ured value.
Monitoring andMeteringAdvanced metering functions arecommon across the UR platform(see page 7). The T60 providesadditional specific monitoringand metering that includes:
Special Metering Functions
Differential and restraining cur-rents, second and fifth harmoniccontent of the differential currentsand the V/Hz ratio. Harmonicsfrom second to twenty-fifth andthe Total Harmonic Distortion(THD) are measured for currents.
www.enerVista.comenerVista enabledenerVista enabled See page 275.
Accessories
Interactive UR Training CD-ROM available. Visitwww.GEindustrial.com/multilin/trainingcd to order.
69
4
SR Transformer Management RelayTM
Features and Benefits
High-speed, multi-processor, three-phase
Two or three-winding
Adaptive relaying features
FlexLogic™ programmable logic
Auto-configuration
Powerful testing and simulation feature
Dynamic CT ratio mismatch correction
IRIG-B input
ModBus® RTU/DNP 3.0 Level 2
Field upgradeable option
Applications
Primary protection and managementof small, medium and large powertransformers
enerVista.com compatible (see page 275)
Protection and Control
Percent differential, overcurrent, frequency and overexcitation
Monitoring and Metering
Individual harmonics and total harmonicdistortion (THD)
Oscillography for faults, inrush or alarmconditions
User Interfaces
Select URPC functionality
RS232, RS485 and RS422 ports
High-speed, multi-processor based relay for
primary transformer protection and management.
GE Multilin
Protection andControlThe 745 is a high-speed, multi-processor based, three-phase,two or three-winding, transformermanagement relay. It offers anysize of power transformer the fol-lowing protection features:
Differential Current
The 745 features the equivalent ofthree single-phase differential cur-rent relays. Dual-slope percentagedifferential and harmonic restraintsprotect against misoperation due tomagnetizing inrush current. Eachdifferential element has program-mable dual-slope percentagerestraint with adjustable slopebreakpoint and differential sensi-tivity. Each element also hasadaptive harmonic restraint withthree programmable methods.
Percentage differential restraint definitions.
Basic operating principle (three-winding)
Percentage differential restraintcharacteristics.
Adaptive Harmonic Restraint
The 745 offers great flexibility indealing with energization condi-tions by providing three program-mable restraint methods, each ofwhich can be enabled or disabledby the user:
HARMONIC INHIBIT allows theuser to set a harmonic restraintlevel of second or second plusfifth which, if enabled, remainsactive all the time
An independent FIFTHHARMONIC INHIBIT allowsrestraint for systems permittingintentional overexcitation(overfluxing) during energization
ENERGIZATION INHIBIT allows theuser to define a temporary lowerrestraint level which will be auto-matically enabled upon detectionof transformer de-energization orparallel transformer energization
Each of the restraint methods fea-tures user-defined cross-phaseaveraging.
Overcurrent Elements
Two IOC and one TOC elementsare provided for each phasewinding, calculated neutral andground current. Each TOCelement features the followingprogrammable characteristics:
Pickup current level 16 curve shapes Curve multiplier (time dial) Instantaneous or linear reset
time characteristic
Curve shapes.
Typical application of 745 FlexCurves.
Instantaneous Differential
Overcurrent
Three unrestrained instantaneousdifferential overcurrent elements(one-per-phase) protect againsthigh magnitude internal faults.
Negative Sequence Overcurrent
Negative sequence instantaneousand time overcurrent elementsincrease sensitivity to phasefaults. Each winding is given itsown element with the same pro-grammable characteristics as thephase and neutral TOC elements.
Adaptive TOC Curves
When supplying nonsinusoidalload currents with a given har-monic factor (as per ANSI/IEEEC57.110-1986), the operationalTOC curves are adjusted to main-tain the desired protection marginwith respect to the transformerthermal damage curve.
Adaptive TOC curves.
745 SR Transformer Management RelayTM
www.GEindustrial.com/Multilin70
4
100%
OPERATEREGION
RESTRAINTREGION
SLOPE 125%
SLOPE 2100%
200%
50%
Irestraint(x CT)
Idifferential(x CT)
15%0.05
1.00PICKUP 0.30
2.0KNEEPOINT
LOAD FLOW
PercentDifferential
Element
I1
V1
I2
V2 I3
V3
CT2
CT1
CT3
745
Transformer ThermalDamage Curve
Selected Relay TimeOvercurrent Curve
Transformer ThermalProtection Margin
Adjusted Overcurrent Pickup Setting- based on calculated load capability due to Harmonic Factor.
Overcurrent Pickup Setting- based on rated load capability.
TIM
E
CURRENT
Ir = Irestraint = I1 I2 I3
I1 I2 I3Id = Idifferential =
% SLOPE = x 100%Idifferential
Irestraint
max( , , )
ANSI Extremely InverseVery InverseNormally InverseModerately InverseDefinite Time
The 745 calculates and maintainsa running average of the systemfrequency and the frequency rate-of-change (df/dt). Two under-frequency and four rate-of-changeelements are provided for tradi-tional and advanced load shed-ding schemes, and featureprogrammable setpoints. Addition-ally, an overfrequency element cantrigger a generator rampdown.
Overexcitation
Overvoltage conditions and over-fluxing of unit generator-trans-formers are protected by twotypes of elements:
FIFTH HARMONIC LEVEL – pro-tects against overvoltageconditions due to power systemdisturbances
VOLTS/HERTZ – protects unit generator-transformers duringspeed changes. Two levels areprovided with setpoints for mini-mum operating voltage, Volts/Hertz pickup, and time delay
745 SR Transformer Management RelayTM
www.GEindustrial.com/Multilin 71
4
Multiple Settings Groups
The user defines four setpointgroups for different power sys-tem configurations and selectswhich group becomes active.Selection is done via the Logic(digital) inputs, front panel orcommunications port.
Restricted Ground Fault
(Optional)
Restricted (differential) groundfault protection covers low mag-nitude fault currents which wouldnot be detected by the percentdifferential element. This is usedon transformers having imped-ance grounded wye windings.
Loss-of-Life (Optional)
This feature provides an estimate ofhow much of the transformers totalinsulation life has elapsed (basedon IEEE Standards C57.91-1995,“IEEE Guide for Loading Mineral-
Oil-Immersed Transformers,” andC57.96-1989, “IEEE Guide for Load-ing Dry-Type Distribution andPower Transformers”).
814825A5.cdr
VOLT 5981
81
150/46
151/46
RTD 1
VOLTS WINDING 1(Highest Voltage)
WINDING 2(Lowest Voltage)
WINDING 3(Intermediate Voltage)
dcmA51N
87
BlockANALOG INPUT(0-20 mA)
745Transformer Management Relay
50/87
150P1 50N2
150P2
151P
50N1
50G1 50G2 51G
187TG
TAP POSITION 250/46
251/46
250P1
250P2
251P
350/46
351/46
350P1
350P2
351P
AMBIENT TEMP.
INSULATIONAGING - Aging Factor Limit - Hottest - Spot Limit - Loss of Life Limit AMPS
Insulation Aging– Aging Factor Limit– Hottest-Spot Limit– Loss of Life LimitTap Changer Failure
THD Total Harmonic Distortion Level
DEVICE COMMON PROTECTION ELEMENTS
Logic Inputs
Sixteen digital logic inputs can beassigned to a variety of prede-fined functions.
Programmable Logic (FlexLogicTM)
FlexLogic™ allows any combina-tion of protection elements, logicinputs and timers to be assignedto any output. Boolean logicgates and 10 internal timers areprovided. Equations can containup to 20 parameters; longerequations are possible throughthe use of virtual outputs.
Output Relays
One high-speed solid state elec-tronic output can be activated byany protection element thoughuser-defined FlexLogic™ equa-tions. Seven of the eight electro-mechanical relay outputs can beactivated by the protectionelements according to FlexLogic™equations. One output is factoryset as an internal self-test failurealarm relay.
Analog Outputs (Optional)
Seven transducer output channelsallow individually programmedoutputs for ranges of 0 to 1 mA,0 to 5 mA, 1 to 10 mA, 0 to 20 mAand 4 to 20 mA. Channels areassignable to any measuredparameter.
Monitoring andMeteringThe 745 features advanced meter-ing functions including:
Currents
The 745 accurately meters andcalculates the following currents:
Phase A, B, C residual (3I0) andground fundamental currents
Running and maximum currentdemand on each phase of each winding
Positive, negative, and zero se-quence currents and phaseangles for all windings
Differential and restraint currentsfor all phases
Ground differential currents (optional)
Harmonics
All current inputs feature har-monic level detectors. A samplingrate of 64 times the power cycleallows recovery up to the 21st har-monic. Total Harmonic Distortion(IEEE.519-1986) or HarmonicDerating Factor (as per ANSI/IEEEC57.110-1986) are calculated foreach winding and comparedagainst user-adjustable setpoints.
Event Recording
The last 128 events are capturedand stored, recording the time,
date, cause, and system parame-ters of each event. This informationis easily accessible by computervia communication port or thefront panel display.
Tap Position, Ambient
Temperature, Analog
Transducer Input
The 745 monitors and displays tapposition and ambient tempera-ture. An optional general purposetransducer input allows a user-de-fined quantity to be monitoredand used as part of the protectionas defined by FlexLogic™.
Simulation Mode
Simulation Mode allows testingthe functionality of the relay bysimply feeding arbitrary waveformdata into the relays simulationbuffer for playback as sampledcurrent input signals.
Oscillography
Synchronously digitized systeminput signals are sampled at arate of 64 times the power cycle.Because all the signals aresampled at the same instant intime the magnitude and phaserelationship of each can becompared. A combination of 16pre and post-trigger cycles can besaved.
Self-Testing
Self-testing is performed at power-on and throughout normaloperation. An alarm message isgenerated if any failure is detected.
745 SR Transformer Management RelayTM
www.GEindustrial.com/Multilin72
4
The 745 saves 16 cycles of waveform data.
745 SR Transformer Management RelayTM
www.GEindustrial.com/Multilin 73
4
STATUS INDICATORS Relay status System status Conditions
COMMUNICATIONSRS232 serial port forinterface to local computerup to 19,200 bps
LOCAL CONTROL KEYS Reset Next (to scroll messages)
DISPLAY40 character display forviewing setpoints and actualvalue messages. Diagnosticmessages are displayedwhen there is a trip or alarmcondition. Default messagesare displayed after a periodof inactivity.
DRAWOUT HANDLEwith provision for a wirelead seal to preventunauthorized removal
Numerical keypad
Setpoint entry and monitor keys for completecontrol without a computer
Help key provides contextsensitive help messages
Features
FeaturesThe 745 offers additional featuresdesigned for ease of use:
Auto CT Configuration
All CTs are connected in a wyeconfiguration for simplicity. Allphase and magnitude correctionsas well as zero-sequence currentcompensation are performedautomatically based on a choiceof over 100 transformer types.
Dynamic CT Ratio Mismatch
Correction
Variances in on-load tap positionoutput are monitored and cor-rected.
Field Upgradeable Option
An optional pass-code key may bepurchased to allow field upgrades.
745 SR Transformer Management RelayTM
www.GEindustrial.com/Multilin74
4
H1
G1
H2
G2
H3
G3
H10
G10
H12
H11
G11
G12
B8
B9
B10
B11
B12A
12
A1
1
A1
0
A9
A8
A7
A6
A5
A4
A3
A2
A1
B1
B2
B3
B4
B5
B6
B7
7655321COM
COM
TRIP2
TRIP3
TRIP4
TRIP5
AUXILIARY6
AUXILIARY7
AUXILIARY8
SELF-TEST
CONTROLPOWER
FILTER GNDSAFETY GND
IRIG-B +IRIG-B -
RTD
F12
E12
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
LOGIC INPUT 1LOGIC INPUT 2LOGIC INPUT 3LOGIC INPUT 4LOGIC INPUT 5LOGIC INPUT 6LOGIC INPUT 7LOGIC INPUT 8 SETPOINT ACCESSLOGIC POWER OUT (+)LOGIC POWER OUT (COM)LOGIC INPUT 9LOGIC INPUT 10LOGIC INPUT 11LOGIC INPUT 12LOGIC INPUT 13LOGIC INPUT 14LOGIC INPUT 15LOGIC INPUT 16RESERVEDRESERVEDVTVT COM
G4
H4
G5
H5
G6
H6
2a2a2b2b2c2c
G7
H7
G8
H8
G9
H9
G2/3G2/3
3a3a3b3b3c3c
1A1A1B1B1C1CG1/2G1/2
WIN
DIN
G
1W
IND
ING
3
CU
RR
EN
T
INP
UT
SW
IND
ING
2
LOG
ICIN
PUTS
LOG
ICIN
PUTS
VT
INPU
TS
PAR
E
DEDICATEDINPUT
OU
TPU
T C
IRC
UIT
S
FRONT PANEL LOCALPROGRAMMING PORT
RS
23
2
COMMUNICATIONSANALOGINPUTS
On LoadTap
Changer ANALOG OUTPUTSRS485COM 1
RS485RS422TxCOM 2
RS485
1A
2a 2b 2c 3a 3b 3c
1B 1C
G1/2
G2/3
WINDING No. 1
WINDING No. 2 WINDING No. 3
ACCESSKEY SWITCH
WINDING 1, 2 OR 3Phase A, B or C
COMA
B
COMMON COMMONHV – Phase A AmpHV – Phase B AmpHV – Phase C AmpLV – Phase A AmpLV – Phase B AmpLV – Phase C AmpTAP POSITION
OUTPUTCHANNEL
COMMUNICATIONGROUND
SC
AD
AO
RC
OM
PUTE
R
INPU
T C
HA
NN
ELS 1
234567
NOTECABLE SHIELDS TO BE GROUNDED AT PLC/COMPUTER END ONLY.
TAP
PO
SIS
TIO
N(FR
OM
ON
LOA
D TA
P C
HA
NG
ER
)
814761B6.dwg
745PCPROGRAM
RS232PERSONALCOMPUTER
9 W
IRE
R23
2
OUTPUT CONTACTS
SHOWN WITH NO
CONTROL POWER
TEMPERATURE
GROUNDBUS
SEPARATE WIRES
CONTROLPOWER
IRIG-BSIGNAL
SEE INSTALLATION CHAPTERFOR CONNECTION DETAILS
SEE COMMUNICATION CHAPTERFOR COMMUNICATION DETAILS
TRIPCOIL
52a
TRIPCOIL
52a
TRIPCOIL
52a
TRIPCOIL
52a
TRIP/SOLID STATE
1
E1
F1
E2
F2
E3
F3
E4
F4
E5
F5
E6
F6
E7
F7
E8
F8
E9
F9
E10
F10
E11
F11
RS232 INTERFACE
RELAY COMPUTER
9 PINCONNECTOR 25 PIN
CONNECTOR
TXDTXDRXDRXD
SGND SGND
1234567
20
2289
12
233
4
4
5
5
6 67
7
8
8
9
GR
OU
ND 745
TransformerManagement Relay™
GE Multilin
COM +-(MASTER)
+-COMEXTERNAL
GE PMDEVICE
(SLAVE #2)
COM+-EXTERNAL
GE PMDEVICE
(SLAVE #1)(32 MAX)
Typical Wiring
745 SR Transformer Management RelayTM
www.GEindustrial.com/Multilin 75
4
TYPE TESTSFast transient: per ANSI/IEEE C37.90.1 (5kV),
per IEC 255-22-4 (4kV)Insulation resistance: per IEC 255-5 (500 VDC, 2000 MW)Dielectric strength: per IEC 255-5 and ANSI/IEEE C37.90
(2 kV @ 60 Hz for 1 minute)Impulse voltage: per IEC 255-5 (5 kV)Surge immunity: per EN 61000-4-5 (common mode 4 kV
and differential modes 2 kV)per ANS/IEEE C37.90.1, per IEC 255-22-1, per Ohyd A-28M-82
Voltage dips: per IEC 1000-4-11 (0%, 40%)Electrostatic discharge: per IEC 255-22-2 (8/15 kV)Power frequency/magnetic field immunity:
per EN 61000-4-8Damp heat (humidity cyclic): per IEC 68-2-30 (6 days)Temperature cycle: -40 C°, +60 C°Mechanical stress: 2gMake and carry/rating or relays:
30 AmpCurrent withstand: per ANSI/IEEE C37.90 (40 x rated amp
for 2 sec, 80 x rated amp for 1 sec)RFI radiated immunity: per IEC 255-22-3 (160 MHZ, 460MHZ), per
EN 61000-4-3 (10 V/m)RFI conducted immunity: per EN 61000-4-6 (10 V)RFI conducted/radiated emission:
per EN 55011/CISPR 11 FCC Part 15
745 Technical Specifications
CASEFully drawout unit (automatic CT shorts)Seal provisionDust tight doorWeight (case and relay): 18 lbs, 6 oz
ENVIRONMENTALOperating temperature range: -40° C to +60° CAmbient storage temperature: -40° C to +80° CHumidity (non-condensing): Up to 90%
4 – 20 mA 600 ΩIsolation: fully isolatedAccuracy: ±1% of full scaleOUTPUTS (1 SOLID STATE)Max ratings: Make and carry 15 A @ 250 VDC for 500 msOUTPUT RELAYS2 – 5 trip: Form A (breaker TRIP rated)6 – 8 auxiliary: Form C 9 self-test: Form CContact material: silver alloyMax ratings: 300 VAC, 250 VDC, 15 A, 1500 VA
RELAYS: 2 – 5 TRIPVOLTAGE MAKE/CARRY MAKE/CARRY BREAK MAX
CONTINUOUS 0.2 SEC LOADDC 30 VDC 20 A 40 A 10 A 300 WResistive 125 VDC 20 A 40 A 0.8 A 300 W
250 VDC 20 A 40 A 0.4 A 300 WDC 30 VDC 20 A 40 A 5 A 150 WInductive 125 VDC 20 A 40 A 0.3 A 150 WL/R = 40 ms 250 VDC 20 A 40 A 0.2 A 150 WAC 120 VDC 20 A 80 A 20 A 5000 VAResistive 240 VDC 20 A 80 A 20 A 5000 VAAC 120 VAC 20 A 80 A 8 A 5000 VAInductive 240 VAC 20 A 80 A 7 A 5000 VAPF=0.4
CONTINUOUS 0.2 SEC LOADDC 30 VDC 10 A 30 A 10 A 300 WResistive 125 VDC 10 A 30 A 0.5 A 62.5 W
250 VDC 10 A 30 A 0.3 A 75 WDC 30 VDC 10 A 30 A 5 A 150 WInductive 125 VDC 10 A 30 A 0.25 A 31.3 WL/R = 40 ms 250 VDC 10 A 30 A 0.15 A 37.5 WAC 120 VDC 10 A 30 A 10 A 2770 VAResistive 240 VDC 10 A 30 A 10 A 2770 VAAC 120 VAC 10 A 30 A 4 A 480 VAInductive 240 VAC 10 A 30 A 3 A 750 VAPF=0.4
PRODUCTION TESTSDielectric strength: IEC 255-5 & ANSI/IEEE C37.90 (2kV @ 60Hz for 1 min)
POWER SUPPLYOptions: LO/HI (specified when ordering)LO range: DC = 20 – 60 V; AC = 20 – 48 V @ 48 – 62 HzHI range: DC = 90 – 300 V; AC = 70 – 265 V @ 48 – 62 HzPower: 30 VA nominal, 40 VA maximum
INPUTSPHASE AND GROUND CURRENT INPUT CIRCUITS Source CT: 1 – 50,000 A/1 or 5 ARelay input: 1 A or 5 A (specified when ordering)Burden: Less than 0.2 VA @ rated loadConversion range: 0.02 – 46 x CTAccuracy: at <4 x CT: ±0.25% of 4 x CT
at ≥4 x CT: ±0.5% of full scaleOverload withstand: 1 sec @ 80 x rated current
2 sec @ 40 x rated currentcontinuous @ 3 x rated current
ANALOG INPUTS (4) General purpose input:
Type: dcmARanges: 0 – 1, 0 – 5, 0 – 10, 0 – 20 or 4 – 20 mA
(programmable)Input impedance: 375 Ω ± 10%Conversion range: 0 – 21 mAAccuracy: ±1% of full scale (based on input range)
Tap position input:Type: resistance (Ω)Ranges: 0 – 500 Ω or 0.5 – 5 kΩ (programmable)Bias current: 1 mA or 10 mA (based on input range)Accuracy: ±1% of full scale (based on input range)
32 VDC @ 2 mA provided by 745Wet contacts: Inputs 1 – 16: 30 – 300 VDC @ 1.5 mAVOLTAGE INPUT CIRCUIT Source VT: 2 – 600 kV/60 – 120 VSource VT ratio: 1 – 5000:1 in steps of 1Relay input: 60 – 120 V phase-neutralMax continuous: 273 V phase-neutral (F.S.)Accuracy: ±1% of 2 x VT
METERINGHARMONICSIndividual: Range: 0.00 – 99.9%
Accuracy: ±1% of Full Scale @ 0.5 x CTTHD: Range: 0.00 – 99.9%
Accuracy: ±1% of Full Scale @ 0.5 x CT
PROTECTION
Note: [x] indicate 1 A secondary CT specifications, other values arefor 5 A secondary.
PERCENT DIFFERENTIAL PROTECTION Operating current pickup: 0.05 – 1.00 in steps of 0.01 x CTDropout level: 97% – 98% of pickupSLOPE-1 range: 15% – 100% in steps of 1SLOPE-2 range: 50% – 200% in steps of 1KP (SLOPE-1 kneepoint): 1.0 – 20.0 in steps of 0.1 x CTHarmonic restraint: 0.1% – 65.0% in steps of 0.1Operate time:
Solid state output: Pickup <1 x CT: 42 – 52 ms1 x CT < Pickup <1.1 x kneepoint: 34 – 44 msPickup >1.1 x kneepoint: 26 – 36 ms
Relay outputs 2 – 5: Pickup <1 x CT: 46 – 56 ms1 x CT <pickup <1.1 x.kneepoint: 38 – 48 msPickup >1.1 x kneepoint: 30 – 40 ms
INSTANTANEOUS DIFFERENTIAL OVERCURRENT Pickup level: 3.00 – 20.00 in steps of 0.01 x CTDropout level: 97% – 98% of pickupLevel accuracy: Per current inputOperate time:
Solid state output: @ 1.2 x pickup: 22 – 30 ms@ 2.0 x pickup: 18 – 26 ms@ 4.0 x pickup: 11 – 19 ms
Relay outputs 2 – 5: @ 1.2 x pickup: 28 – 36 ms@ 2.0 x pickup: 24 – 32 ms@ 4.0 x pickup: 17 – 25 ms
PHASE/NEUTRAL (3I0)/GROUND/NEGATIVE SEQUENCE TIMEOVERCURRENT Pickup level: 0.05 – 20.00 in steps of 0.01 x CTDropout level: 97% – 98% of pickupCurve shape: (see curve shapes)Curve multiplier (time dial): 0.5 – 30 for ANSI, IAC and
FlexCurve™ in steps of 0.10.05 – 1.00 for IEC curves in steps of 0.01
Reset type: Instantaneous or linearLevel accuracy: Per current input
Timing accuracy: at ≥1.03 x pickup: ±3% of trip timeor ±20 ms (whichever is greater)
PHASE/GROUND/NEUTRAL (3I0)/NEGATIVE SEQUENCE INSTAN-TANEOUS OVERCURRENT Pickup level: 0.05 – 20.00 in steps of 0.01 x CTDropout level: 97% – 98% of pickupTime delay: 0 – 60,000 in steps of 1 msLevel accuracy: Per current inputOperate time:
Solid state output: @ 1.2 x pickup: 22 – 30 ms@ 2.0 x pickup: 18 – 26 ms@ 4.0 x pickup: 11 – 19 ms
Relay outputs 2 – 5: @ 1.2 x pickup: 28 – 36 ms@ 2.0 x pickup: 24 – 32 ms@ 4.0 x pickup: 17 – 25 ms
UNDERFREQUENCY (2 ELEMENTS) Operating current pickup: 0.05 – 1.00 in steps of 0.01 x CTOperating voltage pickup: 0.10 – 0.99 in steps of 0.01 x VTPickup level: 45.00 – 59.99 Hz in steps of 0.01 Hz Dropout level: Pickup + 0.03 HzTime delay: 0.00 – 600.00 sec in steps of 0.01 secSignal source: Winding 1 Phase A current/voltageLevel accuracy: ±0.02 HzOperate time (delay set to 0.0 sec):
FREQUENCY RATE OF CHANGE (4 ELEMENTS) Operating current pickup: 0.05 – 1.00 in steps of 0.01 x CTOperating voltage pickup: 0.10 – 0.99 in steps of 0.01 x VTPickup level: 45.00 – 59.99 in steps of 0.01 HzDropout level: Pickup + 0.03 HzRate 1/2/3/4: 0.1 – 5.0 in steps of 0.1 Hz/secDropout level: Pickup + 0.07 Hz/secSignal source: Winding 1 Phase A current/voltageLevel accuracy: ±0.02 HzOperate time: The operate time of the frequency
trend element is variable and is dependent on the decay rate settingand the supervision frequency level.
OVERFREQUENCY (1 ELEMENT):Operating current pickup: 0.05 – 1.00 in steps of 0.01 x CTOperating voltage pickup: 0.10 – 0.99 in steps of 0.01 x VTPickup level: 50.01 – 65.00 in steps of 0.01 HzDropout level: Pickup - 0.03 HzTime delay: 0.00 – 600.00 sec in steps of 0.01 secSignal source: Winding 1 Phase A current/voltageLevel accuracy: ±0.02 HzOperate time (delay set to 0.0 sec):
OVEREXCITATION ON 5TH HARMONIC LEVELDefinite time element:Operating current pickup: 0.03 – 1.00 in steps of 0.01 x CTPickup level: 0.1 – 99.9 in steps of 0.1%Dropout: 95% of pickupTime delay: 0 – 60,000 sec in steps of 1 secSignal source: All phase currentsOperate time (delay set to 0.0 sec):
Solid state output: @ 1.10 x pickup: 20 – 120 msRelay outputs 2 – 5: @ 1.10 x pickup: 25 – 125 ms
OVEREXCITATION ON V/HZ (2 ELEMENTS)Operating voltage pickup: 0.10 – 0.99 in steps of 0.01 x VTPickup level: 1.00 – 4.00 in steps of 0.01 V/HzCurve shape: Definite time (0.1 sec base curve)
IEC curve A/B/CTime delay: 0.00 – 600.00 sec in steps of 0.01 secReset delay: 0.0 – 6000.0 sec in steps of 0.1 secSignal source: VoltageRange: 10 – 65 HzLevel accuracy: ±0.02 V/HzOperate time (delay set to 0.0 sec):
Solid state output: @ 1.10 x pickup: 165 – 195 msRelay outputs 2 – 5: @ 1.10 x pickup: 170 – 200 ms
INSULATION AGING/HOTTEST-SPOT LIMITPickup level: 50 – 300 in steps of 1° CDelay: 0 – 60,000 in steps of 1 min
INSULATION AGING/AGING FACTOR LIMITPickup level: 1.1 – 10.0 in steps of 0.1Delay: 0 – 60,000 in steps of 1 min
INSULATION AGING/LOSS OF LIFE LIMITPickup level: 0 – 20,000 in steps of 1 x 10 hrs.
PROTECTION
APPROVALSCSA: CSA approvedUL: UL listedISO: Manufactured under ISO9001 registered program
: Conforms to IEC 947-1
745 SR Transformer Management RelayTM
www.GEindustrial.com/Multilin76
4
Ordering
745 * * * * * * *745 Base unit transformer management relay
W2 2 windings per phaseW3 3 windings per phase
Phase current input ratingP1 1 A for all windings P5 5 A for all windingsP15 1 A for winding 1, 5 A for winding 2P51 5 A for winding 1, 1 A for winding 2P115 1 A for winding 1, 1 A for winding 2, 5 A for winding 3P151 1 A for winding 1, 5 A for winding 2, 1 A for winding 3P155 1 A for winding 1, 5 A for winding 2, 5 A for winding 3P511 5 A for winding 1, 1 A for winding 2, 1 A for winding 3P515 5 A for winding 1, 1 A for winding 2, 5 A for winding 3P551 5 A for winding 1, 5 A for winding 2, 1 A for winding 3
Ground current input ratingG1 1 A for windings 1 and 2, 1 A for windings 2 and 3G5 5 A for windings 1 and 2, 5 A for windings 2 and 3G15 1 A for windings 1 and 2, 5 A for windings 2 and 3G51 5 A for windings 1 and 2, 1 A for windings 2 and 3
NOTE: For dimensions see SR Family brochure.www.GEindustrial.com/Multilin
Ensure order accuracy –Ensure order accuracy –order on the weborder on the web
User InterfacesVarious user interfaces facilitateoperation of the 745.
Display
A 40 character display allows ac-cess to setpoints, actual values,and diagnostic messages gener-ated by a trip or alarm condition.The 745 can display 30 user-selected messages during inactivity.
Indicators
Twenty LEDs indicate relay sta-tus, system status, and trip andalarm conditions.
IRIG-B Input
This feature provides time synchro-nization via satellite.
Communications
The front panel RS232 port al-lows a PC connection and dataaccess via 745PC software. Oneof the two rear panel RS485 portscan be configured as an RS422port. A SCADA, PLC or remote PCcan be networked to either portwith up to 32 devices. The dualRS485 port configuration allowsfor a redundant communicationschannel or an expansion port. Allports support data rates up to19,200 baud using the ModBus®
RTU protocol. One port may usethe DNP 3.0 Level 2 protocol.
745 GuideformSpecificationsFor an electronic version of the 745guideform specifications, pleasevisit: www.GEindustrial.com/Multilin/specs, fax your request to 905-201-2098 or email to [email protected].
Software
The 745 comes with robust PCsoftware applications (745PC andURPC) which facilitate setpointentry and allow custom viewingand manipulation of measuredparameters. Creating single-linediagrams and accessing multiple745s or other devices for realtime monitoring is made simple.All software runs on Windows®
operating systems. The programmay be used locally through theRS232 serial port or remotelythrough the other ports.
www.enerVista.comenerVista enabledenerVista enabled See page 275.
™Transformer Management Relay is a trademark of GE Multilin.
77
4
DDS Digital Transformer Protection
Features and Benefits
Multiple, configurable digital I/Os
Transformer configuration selection up to four windings
Software winding connection compensation
Enhanced capabilities to ease servicing
GE-NESIS Windows®-based programmingsoftware
IRIG-B input
DDS system compatible
Harmonic restraint
Self-checking functions
Applications
High-speed differential and backupinstantaneous differential three-phaseprotection functions for power trans-formers with two, three or four windings
enerVista.com compatible (see page 275)
Protection and Control
Current differential protection
Dual-slope percentage restraint
Monitoring and Metering
All currents
Event and oscillography recording
User Interfaces
20 character keypad, alphanumeric two-line LCD
RS232, RS485, plastic or glass fiber opticports
ModBus® communication protocol available
High-speed, three-phase differential
protection for transformer faults.
GE Multilin
Protection andControlThe DTP is a digital relay thatprovides high-speed differentialand backup instantaneous differ-ential three-phase protection forpower transformers with two,three or four windings.
Differential Protection
For high-magnitude externalfaults, the DTP uses a currentdifferential with percentagerestraint to compensate for unbal-ance caused by variation in CToutputs.
The DTP differential unit hasprogrammable dual-slope percent-age restraint with adjustable slopebreakpoint.
Discrete Fourier Transformation(DFT) provides excellent frequencyfiltration, making the differentialcurrent measurement immune tonoise, DC components and wavedistortion. This gives the digitalDTP relay a clear advantage overother analog and hybrid models.The algorithm used to calculatethe RMS value permits a high levelof accuracy in the through currentmeasurement.
Phase Shift Compensation
Internal compensation is selectedto adjust for the phase shift
across the protected transformer.This selection allows the DTP tomake the proper phase adjust-ments to the applied currents andeliminates the zero-sequencecomponent of the current.
Conventional external compensa-tion can also be selected. Thissetting is useful for testing therelay with single and three-phasetest sources that supply in-phasecurrents.
Harmonic Restraint
A second and fifth harmonicrestraint current is calculated foreach phase and extracted usingDFTs. The magnitude of thiscurrent is used to discriminatebetween faults and inrush condi-tions, restraining differentialfunction during inrush caused byenergization and overexcitation.
Unrestrained IOC
This acts as a backup protectionfor high magnitude internal faultsthat produce sufficient CT satura-tion to cause harmonic restraintof the differential protection. Theinstantaneous trip function usesthe fundamental component ofthe differential current.
Digital Inputs
The DTP has seven digital inputsconfigurable by the user with theGE-INTRO software. One of thefollowing values can be assignedto each input:
Unused input External trigger (P) Table 0 selection (L) Table 1 selection (L) Buchholz alarm (L) Buchholz trip (L) Overtemperature alarm (L) Overtemperature trip (L) Trip block (L)(P) function is activated by pulse(L) function is activated by level
The configurable inputs can beused to implement ‘AND’ logicschemes, and assigning them tothe outputs.
Digital Outputs
The DTP system has eight user-configurable outputs, four tripcontacts (rated 16 A) and an alarmcontact. The configurable outputscan be programmed using logicbased on the internal protectionstates. The internal states of theDTP can be used to carry out logi-cal operations NOT, AND, and OR.
The output configuration is doneusing the different levels. At thefirst level it is possible to use ANDgates of up to 16 signals. Once theAND gates have been configured,it is possible to create a secondlevel with OR gates of 16 inputs,whose logical outputs are assignedto physical outputs of the unit.
Line current (module and argu-ment for each phase andwinding)
Differential and through currentfor each phase
Second and fifth harmoniccurrent for each phase
Measurement data can beaccessed locally on the front panelLCD display or via the GE-LOCALsoftware.
Event Recording
Date and time (1 millisecondresolution)
Type of event Value of the differential and
through currents Internal states matrix of the unit
This 166 event recorder features anon-volatile memory that can bemaintained indefinitely, even withno power supply. Each event isassociated to the internal protec-tion and communication states.
Oscillography
The DTP unit stores up to fouroscillography records, with a reso-lution of 16 samples per cycle. Each
DTP DDS Digital Transformer Protection
www.GEindustrial.com/Multilin78
4
Functional Block Diagram
703750A6.CDR
DTP
87
87B
record has a maximum capacity of66 cycles. The number of prefaultcycles can be selected from two to10 cycles. Each of the recordsincludes the following information:
Instantaneous values for currentinputs
Digital information Date and time Cause of record generation Active settings at moment of the
record
The possible causes for oscillog-raphy record generation are:
87B phase A trip 87B phase B trip 87B phase C trip 87 phase A trip 87 phase B trip 87 phase C trip Buchholz trip Overtemperature trip Input trigger Communications trigger
A configurable mask determineswhich functions or internal tripsstart the oscillography. It mayalso be started by configurabledigital input, communications ordirectly from the MMI.
Oscillography records can beconverted into a COMTRADEIEEE file using the GE-LOCALcommunications program. Theycan be viewed using the GE-OSCprogram, or any other programthat accepts COMTRADE IEEEC37.111-1991 format.
DTP DDS Digital Transformer Protection
DTP oscillography.
Self-Checking Functions
Self-checking functions at startupand during normal operation willblock operation if an error isdetected. Additionally, theTARGET RESET button allowstesting of LED.
Setting Tables
The DTP has three independentsetting tables, stored in non-volatile memory. Only one tablemay be active at any time for usein performing system functions.The differential function settingsgroup is accessed separately foreach table.
User InterfacesThe DTP offers a variety of userinterfaces, including:
Human-Machine Interface (HMI)
A 20 character keypad and two-line, 32 character LCD displayprovide local access.
A keypad and display allow local communication.
LED Indicators
The DTP features one fixed bicolorLED assigned to the critical alarmfunction and 16 red LEDs arrangedin one column. They can be config-ured using the GE-INTRO softwareto any user definable alarm. EachLED can be configured to havememory in the absence of auxiliarypower supply, or to blink whenturned on.
Default LED configuration.
LED # Description
1 87 A trip2 87 B trip3 87 C trip4 87B A trip5 87B B trip6 87B C trip7 Buchholz alarm8 Buchholz trip9 Temperature alarm10 Temperature trip11 Out of service12 Trip not permitted13 EEPROM alarm14 Date and time alarm15 Internal communication error16 Remote mode
Communications
The DTP has two serial channelsand three connectors. Channel 1is accessed from the front panelin connector 1 (PORT 1) or fromthe back (PORT 3). Channel 2 isaccessed from connector 2(PORT 2) on the back.
PORT 1 connector has priorityover PORT 3 connector and isselected when the Data CarrierDetect (DCD) signal is activated.Channels 1 and 2 are independentand can be used simultaneously.
There are different port configu-rations available for each model:
Two connectors are RS232(PORT 3 does not exist)
PORT 1 is RS232, PORT 2 isRS485 (PORT 3 does not exist)
PORT 1 and PORT 3 are RS232and a fiber optic connectorreplaces the PORT 2 connector
www.GEindustrial.com/Multilin 79
4
ABS
ABS
ABS
ABS
M
M
I1 i
iI2
I3 i
I4 i
WINDINGS4
f1
2f
f 5
GIS
G2
G5
ABS
ABS
ABS
M-+-
DIF. TRIPFDIF.
INS.FINST. TRIP
i= ,120, 240PHASE
0
I DIF.
CALCUL.THROUGHI
I
I
VV
V
blockdtplai
Block Diagram
SET 1/Y 2 3/N CLR
INF 4 5 6
ACT 7 8 9
END +/- 0 . ENT
READY
DTP DDS Digital Transformer Protection
www.GEindustrial.com/Multilin80
4
The communications protocolrequires the use of the GE-LOCALsoftware to facilitate communica-tion with different protectionsystems. It guarantees efficient datatransfer (especially for oscillogra-phy and other large files) alongwith error detection and automaticcommunication recovery.
OPTIONAL FOR 3/4
WINDING CONFIGURATIONS
GE Multilin
Q11
Q12
P11
K2
J4
J2
J1
K3
K4
K1
SURGE/SAFETY GROUND
+-
A1
A3
A5
A2
A4
A6
WIN
DIN
G 1
A
WINDING No. 4
WINDING No. 1
WINDING No. 3
WINDING No. 2
B C
DTP-BDigital Transformer
Protection
+
+
+
_
+
+
+
OVERTEMP. ALARM
J3 + OVERTEMP. TRIP
ACTIVE TABLE 1 SELEC.
BUCHOLZ TRIP
BUCHOLZ ALARM
OSCILLOGRAPHY TRIGGER
ACTIVE TABLE 0 SELEC.
INPUTS COMMON
PR
OG
RA
MM
AB
LE IN
PU
TS
703756A2.CDR
PORT 1 (Front)
PORT 2 (Rear)
PORT 3 (Rear)
DB 9 FEM
DB 9 FEM
RS232
F.O. (Glass or plastic)or RS485
RS232(Not available if rear
PORT 2 is RS485)
a ab bc c
B5
B3
B1
B6
B4
B2 WIN
DIN
G 2
CU
RR
EN
T IN
PU
TS
P9
Q9
P8
Q8
P7
Q7
P6
Q6
P5
Q5
J5
K5
K6
J7
J8
K8
K9
K11
J10
J12
J6
K7
J9
J11
K10
K12
DIFFERENTIALPHASE B
DIFFERENTIALPHASE A
DIFFERENTIALPHASE C
BACKUP PHASE A
BACKUP PHASE B
BUCHHOLZ ALARM
BACKUP PHASE C
OVERTEMPERATUREALARM
TRIP
TRIP
TRIP
TRIP
SYSTEM READY
OU
TP
UT
SP
RO
GR
AM
MA
BLE
OU
TP
UT
SD
EFA
ULT
SE
TT
ING
S, U
SE
R C
ON
FIG
UR
AB
LE
E2
E4
E6
E1
E3
E5
WIN
DIN
G 3
F2
F4
F6
F1
F3
F5
WIN
DIN
G 4
a ab bc c
CONTROLPOWER
P08
P07
P06
P05
P04
P03
P02
P01
Typical Wiring
Software
Two Windows®-based softwarepackages are included with the DTP:
GE-LOCAL enables the user tovisualize the protection settings,alarms, LEDs, measurementsand status, to retrieve oscillog-raphy records, to retrieve eventrecords
GE-INTRO enables the user to con-figure the I/Os and LEDs
As an option, GE-OSC softwareenables the user to study theoscillography records.
These software packages are partof the GE Network SubstationIntegration System (GE-NESIS)software used by the DDS system.
DimensionsTOP VIEW PANEL MOUNTING
FRONT VIEW17.13"(435)
1.17"(29)
19.00"(484)
7.30"(185)
INCHES(mm)
18.38"(467)
17.38"(441)
4.00"(102)
4 x 0.28" Dia.(7)
7.00"(178)
10.25"(260) CUTOUT
703751A3.ai
DTP DDS Digital Transformer Protection
www.GEindustrial.com/Multilin 81
4
CASEMetal CasingIP52 grade protection (as per IEC 529)
ENVIRONMENTALAmbient temperature range:
Operation: -20° C to +55° CStorage: -40° C to +85° C
Humidity: Up to 95% non-condensing
PACKAGINGWeight:
Net: 26.4 lbs (12 kg)Shipping: 28.6 lbs (13 kg)
Dimensions: NEED INCH EQUIVALENTS437 x 200 x 176 mm (19" rack 4 units high)
TYPE TESTSThe DTP equipment complies with the following standards, whichinclude the GE insulation and electromagnetic compatibility standardand the standards required by Community Directive 89/336 for the ECmarket, in line with European standards. It also complies with theEuropean directive requirements for low voltage, and the environ-mental and operating requirements established in ANSI standardsC37.90, IEC 255-5, IEC 255-6 and IEC 68.Insulation Test Voltage: IEC 255-5, 600V, 2kV 50/60 Hz, 1 minImpulse Voltage Withstand:
IEC 255-5, 5 kV, 0.5 J1 MHz Interference: IEC 255-22-1, Class IIIElectrostatic Discharge: IEC 255-22-2, Class IVImmunity to Radio Interference:
IEC 255-22-3, Class IIIElectromagnetic Fields Radiated with Amplitude Modulation:
ENV 50140, 10 V/mElectromagnetic Fields Radiated with Amplitude Modulation:
Common mode: ENV 50141, 10 V/mElectromagnetic Fields Radiated with Frequency Modulation:
ENV 50204, 10 V/mFast Transients: IEC 255-22-4, EN 61000-4-4, Class IVMagnetic Fields at Industrial Frequency:
EN 61000-4-8, 30 Av/mRF Emission: EN 55011, Class B
1 Nominal current rating In = 1 A all windings5 Nominal current rating In = 5 A all windingsA Nominal current rating In = 5 A for 1st winding, 1 A for all othersB Nominal current rating In = 1 A for 1st winding, 5 A for all othersC Nominal current rating In = 1 A for 1st and 2nd windings,
5 A for windings 3 and 40 2 RS232 communication ports1 2 RS232 + plastic fiber optic communication ports See ➀2 2 RS232 + glass fiber optic communication ports3 RS232 + RS485 communication ports
M Spanish languageD English language
G 48/125 VDC supply voltageH 110/250 VDC supply voltage
NOTE: P1 (front) is switched with P3 (rear)P2 (rear) is independent
DTP revision level AFor ordering information and features on the earlier DTP (Revision A) please visit us atwww.GEindustrial.com/Multilin
DTP GuideformSpecificationsFor an electronic version of the DTPguideform specifications, pleasevisit: www.GEindustrial.com/Multilin/specs, fax your request to 905-201-2098 or email to [email protected].
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GE Multilin 82
DTRDTRTransformer Tap Changer Controller
Automatic voltage regulation,
analysis, and control functions for
transformer applications.
Applications
Control power transformer OLTCs to regulate voltage
Integrated Systems
Protection and Control
Automatic voltage regulator
Automatic/manual operation
Three setting tables
Configurable inputs and outputs
BCD format inputs to detect tap changerposition
Control pulse outputs
Monitoring and Metering I, V, P, Q, cos j, frequency measurement
Transformer OLTC position
Event recording
Counter of the tap position increases anddecreases for rise and lower operations of tapchanger
User Interfaces Rear communication port (plastic or glass
fiber optic, RS232 or RS485)
RS232 port, faceplate accessible
GE-NESIS Windows® based programmingsoftware
Mimic for increasing/decreasing commandsand tap displaying
Graphic display and keypad
ModBus®, M-Link, and M-Link Plus communications protocols
DDS system compatible
83 www.GEindustrial.com/Multilin
DTR Transformer Tap Changer Controller
DESCRIPTIONThe transformer tap changercontroller DTR controls automaticallythe transformer on load tap changer,so that the power supply voltage ispractically constant, independentlyfrom the load. In order to achieve this,the DTR is able to increase anddecrease the OLTC in the power trans-former.
The DTR can be applied to anyexisting tap changer, as its settingsand operation ranges, as well as itsinputs and outputs, are fullycompatible with all the OLTC avail-able in the market.
The DTR has been designed usingthe same hardware architecture asthe DDS protection and controlsystem. This means that, besidesbeing a powerful individualelement, the DTR is completelycompatible with the system, andcan be fully integrated in a substa-tion.
The DTR also provides analysis andcontrol functions, such as eventrecording. The internal memoryallows storing up to 165 events. Italso includes measuring functionsfor I, V, frequency, etc.
As all the units part of the DDSfamily, the DTR provides easilyconfigurable inputs and outputs.The user can program these inputsand outputs by means of user-friendly software programs, part ofGE-NESIS (GE-INTRO, GE-LOCAL).This software package is Windows®
based and it is the same for all theDDS family.
CONTROLOperationThe DTR is used to maintain aconstant voltage level at feedersbusbar. The unit gives commandsto increase and decrease the trans-former OLTC. As these differencesin the tap position are usuallydiscrete, the DTR allows the user toset the percentage of changebetween taps. In addition, a timedelay is provided by setting, toallow matching the OLTC timerequired to change from one tap tothe closest next.
Automatic/Manual OperationUsing one of the configurable digi-tal inputs, the DTR can receive anorder for automatic or manualoperation. Manual operation haspriority over automatic, in order toavoid performance failures in thecase of manual operations. Thiscommand can also be sent to theunit by means of the communica-tions software, or the MMI.
BlockingsThe transformer tap changercontroller DTR blocks its operationin case that voltage falls belowuser defined limits, (undervoltageblocking), and also when voltage orcurrent exceeds another userdefined limit (overvoltage or over-current blocking).
SettingsThe unit provides three settingtables. The user can move from onetable to another using a digitalinput or through communications.This feature allows the use ofdifferent settings in differentsystem situations to better main-tain the actual system needs ofsecurity, etc.
MONITORINGAND METERING
MeasuresThe voltage regulator DTR displaysinstantaneous values of I, V, P andQ (three-phase), frequency and cosϕ values.
Event Recorder165 events are recorded in non-volatile EEPROM memory. Dateand time (1 ms resolution), type ofevent, voltage and current, and arelay status snapshot are stored.
Digital Inputs and OutputsThe DTR system has 42 digitalinputs and 22 outputs. These I/Oscan be configured by the user bymeans of GE-INTRO configurationsoftware.
www.GEindustrial.com/Multilin
5
DTR Transformer Tap Changer Controller
84
Typical Wiring
Q11
CONTROLPOWER
CONTROLPOWERSUPPLY
P11
A12
O1
O2
O3
O4
O5
O6
G
CU
RR
EN
T IN
PU
TS
VO
LTA
GE
B4
A8
A2
B3
A7
A1
I1
V
I5
I1
V
I5
D11 C11
P1
Q1
P2
I2I1
INP
UT
S 1
Q2
P3
Q3
P4
Q4
I3I4I5I6
I7
DTRAutomatic Voltage Regulator
GE Power Managementg
PR
OG
RA
MM
AB
LE O
UT
PU
TS
Q5
P5
P6
Q7
P7
Q8
Q9
P8
P9
Q10
L10
L11
L12
N5
N6
N7
N8
N9
N10
N11
N12
P10
M10
M11
M12
O5
O6
O7
O8
O9
O10
O11
O12
Q6
INCREASECOMMAND
MANUAL
STOP
SYSTEM READY
OVERCURRENT
DECREASECOMMAND
AUTOMATIC
O7
O8
O9
O10
O11
O12
O13
O14
O15
O16
O17
O18
O19
O20
O21
O22
L5
M5
M6
L7
M7
L8
L9
M8
M9
L6
STOPCOMMAND
UNDERVOLTAGE
LOCAL
REMOTE
BCD 1 TAP
BCD 2 TAP
BCD 3 TAP
BCD 4 TAP
BCD 5 TAP
BCD 6 TAP
SUCCESSIVEOPERATIONS
EXCESSIVEOPERATIONS
OVERVOLTAGE
COMMAND NOTEXECUTED
IRREGULARTAP CHANGE
TAP 1 (BCD)TAP 2 (BCD)
TAP 3 (BCD)TAP 4 (BCD)
TAP 5 (BCD)TAP 6 (BCD)
COMMON
J1
K1
J2
I9I8
INP
UT
S 2
K2
J3
K3
J4
K4
I10I11I12I13
I14
INTERLOCKING 1
INTERLOCKING 2
REGULATOR ALARM
COMMON
J5
K5
J6
I16I15
INP
UT
S 3
K6
J7
K7
J8
K8
I17I18
I19I20
I21COMMON
J9
K9
J10
I23I22
INP
UT
S 4
K10
J11
K11
J12
K12
I24I25
I26I27
I28COMMON
INCREASEDECREASEAUTOMATIC
L1
M1
L2
I30I29
M2
L3
M3
L4
M4
I31I32
I33I34
I35COMMON
N1
O1
N2
I37I36
INP
UT
S 5
INP
UT
S 6
RT
U IN
PU
TS
02
N3
O3
N4
O4
I38I39
I40I41
I42COMMON
MANUAL
TABLE 1
STOP
TABLE 2
EN DTR CON.cdr
DTR Transformer Tap Changer Controller
85 www.GEindustrial.com/Multilin
www.GEindustrial.com/pm
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Technical Specifications
PACKAGING
Dimensions: H 7.3" x W 19.0" x D 9.1"(185 mm x 484 mm x 231 mm)
Weight:Not Packaged: 13.2 lbs (6 kg)Packaged: 15.4 lbs (7 kg)
MECHANICAL CHARACTERISTICS
• Metallic package in 19” rack and 4 units high.• Frontal HMI with LCD display and keypad.• Protection class IP52 (according to IEC 529)
COMMUNICATIONSLocal Communication: LCD alphanumeric display with
two lines of 16 characters per line; 20 button frontal keypad
Remote Communication(local or remote PC and communications net):
Mode: half duplexSpeed: 1,200 to 115,000 bpsPhysical media:
Isolation Test Voltage: 2 kV, 50/60 Hz, 1 minSurge Test Voltage: 5 kV peak, 0.5 JInterference: Class III according to CEI 255-22-1Electrostatic Discharge: Class IV according to CEI 255-22 2Radiointerference: Class III according to CEI 255-22-3Fast Transient: Class IV according to CEI 255-22-4 Sinusoidal Vibration: Class II according to CEI 255-21-1 Shock: Class I according to CEI-22521-2 Radiofrequency Emission: according to CEI 41B (Sec) 81
and EN55022 class B
ENVIRONMENTAL
Temperature:Storage: -40 to +85°COperation: -20 to +70°C
Humidity: Up to 95% without condensing
OUTPUTS
TRIPPING CONTACTSContact Capacity:
Maximum Operating Voltage: 440 VACContinuous Current: 16 AMake and Carry: 30 ABreaking: 4000 VA
INPUTS
THERMAL CAPACITYCurrent Circuits:
Continuously: 4 x InDuring 3 Sec: 50 x InDuring 1 Sec: 100 x In
Voltage Circuits:Continuously: 2 x VnDuring 1 Min: 3,5 x Vn
BURDENSCurrent Circuits: 0.5 VA for In = 5 A
0.1 VA for In = 1AVoltage Circuits: 0.2 VA, Vn= 63.5 VDC Burden:
During Operation: 12 WPer Each Activated Input: 8 mA / 1 W, Vaux: 125 VDC
