GE 489 Instruction Manual page 4

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TABLE OF CONTENTS
4.3.2 VOLTAGE SENSING..........................................................................................4-8
4.3.3 GENERATOR PARAMETERS ...........................................................................4-9
4.3.4 SERIAL START/STOP INITIATION....................................................................4-9
4.4 S3 DIGITAL INPUTS
4.4.1 DESCRIPTION .................................................................................................4-10
4.4.2 ACCESS SWITCH ............................................................................................4-10
4.4.3 BREAKER STATUS .........................................................................................4-10
4.4.4 GENERAL INPUT A to G..................................................................................4-11
4.4.5 REMOTE RESET .............................................................................................4-12
4.4.6 TEST INPUT .....................................................................................................4-12
4.4.7 THERMAL RESET............................................................................................4-12
4.4.8 DUAL SETPOINTS ...........................................................................................4-12
4.4.9 SEQUENTIAL TRIP ..........................................................................................4-13
4.4.10 FIELD-BREAKER DISCREPANCY ..................................................................4-14
4.4.11 TACHOMETER.................................................................................................4-14
4.4.12 WAVEFORM CAPTURE .................................................................................4-15
4.4.13 GROUND SWITCH STATUS ...........................................................................4-15
4.5 S4 OUTPUT RELAYS
4.5.1 DESCRIPTION .................................................................................................4-16
4.5.2 RELAY RESET MODE ....................................................................................4-16
4.6 S5 CURRENT ELEMENTS
4.6.1 INVERSE TIME OVERCURRENT CURVE CHARACTERISTICS ...................4-17
4.6.2 OVERCURRENT ALARM.................................................................................4-20
4.6.3 OFFLINE OVERCURRENT ..............................................................................4-20
4.6.4 INADVERTENT ENERGIZATION.....................................................................4-21
4.6.5 VOLTAGE RESTRAINED PHASE OVERCURRENT.......................................4-22
4.6.6 NEGATIVE SEQUENCE OVERCURRENT......................................................4-23
4.6.7 GROUND OVERCURRENT .............................................................................4-25
4.6.8 PHASE DIFFERENTIAL ...................................................................................4-26
4.6.9 GROUND DIRECTIONAL.................................................................................4-27
4.6.10 HIGH-SET PHASE OVERCURRENT...............................................................4-28
4.7 S6 VOLTAGE ELEMENTS
4.7.1 UNDERVOLTAGE ............................................................................................4-29
4.7.2 OVERVOLTAGE...............................................................................................4-30
4.7.3 VOLTS/HERTZ .................................................................................................4-31
4.7.4 PHASE REVERSAL .........................................................................................4-32
4.7.5 UNDERFREQUENCY ......................................................................................4-33
4.7.6 OVERFREQUENCY .........................................................................................4-34
4.7.7 NEUTRAL OVERVOLTAGE (FUNDAMENTAL)...............................................4-35
4.7.8 NEUTRAL UNDERVOLTAGE (3RD HARMONIC) ...........................................4-36
4.7.9 LOSS OF EXCITATION....................................................................................4-38
4.7.10 DISTANCE ELEMENTS ...................................................................................4-39
4.8 S7 POWER ELEMENTS
4.8.1 POWER MEASUREMENT CONVENTIONS ...................................................4-41
4.8.2 REACTIVE POWER .........................................................................................4-42
4.8.3 REVERSE POWER ..........................................................................................4-43
4.8.4 LOW FORWARD POWER ...............................................................................4-44
4.9 S8 RTD TEMPERATURE
4.9.1 RTD TYPES......................................................................................................4-45
4.9.2 RTDS 1 TO 6 ....................................................................................................4-46
4.9.3 RTDS 7 TO 10 ..................................................................................................4-47
4.9.4 RTD 11 .............................................................................................................4-48
4.9.5 RTD 12 .............................................................................................................4-49
4.9.6 OPEN RTD SENSOR .......................................................................................4-49
4.9.7 RTD SHORT/LOW TEMPERATURE................................................................4-50
4.10 S9 THERMAL MODEL
4.10.1 489 THERMAL MODEL ....................................................................................4-51
4.10.2 MODEL SETUP ................................................................................................4-52
4.10.3 UNBALANCE BIAS...........................................................................................4-61
4.10.4 MACHINE COOLING........................................................................................4-62
4.10.5 HOT/COLD CURVE RATIO..............................................................................4-63
4.10.6 RTD BIAS .........................................................................................................4-63
4.10.7 THERMAL ELEMENTS ....................................................................................4-64
489 Generator Management Relay GE Power Management