GE DGP Series - Page 6

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DGP Digital Generator Protection System
GE Power Management
TABLE OF CONTENTS
107: VT RATIO – VOLTAGE TRANSFORMER RATIO................................ 2-10
108: COMMPORT – COMMUNICATIONS PORT........................................ 2-11
109: PHASE – PHASE DESIGNATION........................................................ 2-11
110: TIMESYNC – TIME SYNCHRONIZATION SOURCE........................... 2-11
111: NUM FLTS – NUMBER OF FAULT EVENTS....................................... 2-11
112: PREFLT – PREFAULT CYCLES.......................................................... 2-12
113: OSC TRIG – EXTERNAL OSCILLOGRAPHY TRIGGER .................... 2-12
114: NOM VOLT – NOMINAL VOLTAGE..................................................... 2-12
115: RATEDCUR – RATED CURRENT ....................................................... 2-12
116: VT CONN – VOLTAGE TRANSFORMER CONNECTION................... 2-12
117: NCTRATIO – NEUTRAL CURRENT TRANSFORMER RATIO ........... 2-12
2.2.2 EXAMPLE CONFIGURATION SETTINGS.............................................. 2-12
2.3 PROTECTION FUNCTION SETTINGS
2.3.1 TRIP AND ALARM OUTPUT RELAYS.................................................... 2-13
2.3.2 STATOR DIFFERENTIAL 87G................................................................ 2-13
2.3.3 CURRENT UNBALANCE ALARM 46A.................................................... 2-18
2.3.4 CURRENT UNBALANCE TRIP 46T........................................................ 2-18
2.3.5 LOSS OF EXCITATION 40, 40-1, 40-2 ................................................... 2-20
2.3.6 ANTI-MOTORING (REVERSE POWER)................................................. 2-21
2.3.7 OVERCURRENT WITH VOLTAGE RESTRAINT (51V).......................... 2-22
2.3.8 STATOR GROUND FAULT 64G-1.......................................................... 2-28
2.3.9 STATOR GROUND FAULT 64G-2.......................................................... 2-28
2.3.10 STATOR GROUND FAULT 27TN ........................................................... 2-28
2.3.11 OVEREXCITATION ALARM (VOLTS/HERTZ: 24A) ............................... 2-29
2.3.12 OVEREXCITATION TRIP (VOLTS/HERTZ: 24T).................................... 2-29
2.3.13 OVERVOLTAGE 59.................................................................................2-34
2.3.14 UNDERVOLTAGE CUTOFF OF 81......................................................... 2-36
2.3.15 UNDERFREQUENCY 81-U..................................................................... 2-36
2.3.16 OVERFREQUENCY 81-O ....................................................................... 2-36
2.3.17 DIGITAL INPUT DI................................................................................... 2-36
2.3.18 VOLTAGE TRANSFORMER FUSE FAILURE VTFF .............................. 2-37
2.3.19 ACCIDENTAL ENERGIZATION AE ........................................................ 2-37
2.3.20 GROUND OVERCURRENT 51GN.......................................................... 2-38
2.3.21 UNDERVOLTAGE 27 .............................................................................. 2-38
2.4 COMMISSIONING
2.4.1 DGP***AAA SETTINGS TABLE .............................................................. 2-41
2.4.2 DGP***ABA SETTINGS TABLE .............................................................. 2-46
2.4.3 DGP***ACA SETTINGS TABLE .............................................................. 2-51
3. HARDWARE
DESCRIPTION
3.1 CASE ASSEMBLY
3.1.1 WARNING.................................................................................................. 3-1
3.1.2 CONSTRUCTION...................................................................................... 3-1
3.1.3 ELECTRICAL CONNECTIONS & INTERNAL WIRING............................. 3-1
3.1.4 IDENTIFICATION ...................................................................................... 3-1
3.2 CIRCUIT BOARD MODULES
3.2.1 WARNING.................................................................................................. 3-4
3.2.2 BASIC CONSTRUCTION .......................................................................... 3-4
3.2.3 IDENTIFICATION ...................................................................................... 3-4
3.3 XTM TEST PLUGS
3.3.1 DESCRIPTION .......................................................................................... 3-6
3.3.2 TERMINAL DESIGNATION....................................................................... 3-6
3.3.3 XTM TEST-CIRCUIT CONNECTIONS...................................................... 3-6
3.3.4 TEST PLUG INSERTION .......................................................................... 3-6