GE 489 - Manual (Page 4)

2 489 Generator Management Relay GE Multilin
TABLE OF CONTENTS
4.2.6 Message Scratchpad ........................................................................................4-10
4.2.7 Clear Data.........................................................................................................4-11
4.3 S2 SYSTEM SETUP
4.3.1 Current Sensing................................................................................................4-12
4.3.2 Voltage Sensing................................................................................................4-12
4.3.3 Generator Parameters ......................................................................................4-13
4.3.4 Serial Start/Stop Initiation .................................................................................4-13
4.4 S3 DIGITAL INPUTS
4.4.1 Description........................................................................................................4-14
4.4.2 Breaker Status ..................................................................................................4-14
4.4.3 General Input A to G.........................................................................................4-15
4.4.4 Remote Reset...................................................................................................4-16
4.4.5 Test Input..........................................................................................................4-16
4.4.6 Thermal Reset ..................................................................................................4-16
4.4.7 Dual Setpoints ..................................................................................................4-16
4.4.8 Sequential Trip..................................................................................................4-17
4.4.9 Field-Breaker Discrepancy ...............................................................................4-18
4.4.10 Tachometer.......................................................................................................4-18
4.4.11 Waveform Capture............................................................................................4-19
4.4.12 Ground Switch Status .......................................................................................4-19
4.5 S4 OUTPUT RELAYS
4.5.1 Description........................................................................................................4-20
4.5.2 Relay Reset Mode ............................................................................................4-20
4.6 S5 CURRENT ELEMENTS
4.6.1 inverse Time Overcurrent Curve Characteristics ..............................................4-21
4.6.2 Overcurrent Alarm ............................................................................................4-24
4.6.3 Offline Overcurrent ...........................................................................................4-24
4.6.4 Inadvertent Energization...................................................................................4-25
4.6.5 Voltage Restrained Phase Overcurrent ............................................................4-26
4.6.6 Negative Sequence Overcurrent ......................................................................4-27
4.6.7 Ground Overcurrent..........................................................................................4-29
4.6.8 Phase Differential .............................................................................................4-30
4.6.9 Ground Directional............................................................................................4-31
4.6.10 High-Set Phase Overcurrent.............................................................................4-32
4.7 S6 VOLTAGE ELEMENTS
4.7.1 Undervoltage ....................................................................................................4-33
4.7.2 Overvoltage ......................................................................................................4-34
4.7.3 Volts/Hertz ........................................................................................................4-35
4.7.4 Phase Reversal ................................................................................................4-36
4.7.5 Underfrequency ................................................................................................4-37
4.7.6 Overfrequency ..................................................................................................4-38
4.7.7 Neutral Overvoltage (Fundamental) .................................................................4-39
4.7.8 Neutral Overvoltage (3rd Harmonic).................................................................4-40
4.7.9 Loss of Excitation..............................................................................................4-42
4.7.10 Distance Element..............................................................................................4-43
4.8 S7 POWER ELEMENTS
4.8.1 Power Measurement Conventions....................................................................4-45
4.8.2 Reactive Power.................................................................................................4-46
4.8.3 Reverse Power .................................................................................................4-47
4.8.4 Low Forward Power..........................................................................................4-48
4.9 S8 RTD TEMPERATURE
4.9.1 RTD Types........................................................................................................4-49
4.9.2 RTDs 1 to 6.......................................................................................................4-50
4.9.3 RTDs 7 to 10.....................................................................................................4-51
4.9.4 RTD 11 .............................................................................................................4-52
4.9.5 RTD 12 .............................................................................................................4-53
4.9.6 Open RTD Sensor ............................................................................................4-54
4.9.7 RTD Short/Low Temperature............................................................................4-54
4.10 S9 THERMAL MODEL
4.10.1 489 Thermal Model...........................................................................................4-55
4.10.2 Model Setup......................................................................................................4-56
4.10.3 Thermal Elements.............................................................................................4-68