2
TABLE OF CONTENTS
4.2.6
Message Scratchpad ........................................................................................4-10
4.2.7
Clear Data.........................................................................................................4-11
4.3.1
Current Sensing................................................................................................4-12
4.3.2
Voltage Sensing................................................................................................4-12
4.3.3
Generator Parameters ......................................................................................4-13
4.3.4
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
4.4.10
Tachometer.......................................................................................................4-18
4.4.11
Waveform Capture............................................................................................4-19
4.4.12
Ground Switch Status .......................................................................................4-19
4.5.1
Description ........................................................................................................4-20
4.5.2
Relay Reset Mode ............................................................................................4-20
4.6.1
4.6.2
Overcurrent Alarm ............................................................................................4-24
4.6.3
Offline Overcurrent ...........................................................................................4-24
4.6.4
4.6.5
4.6.6
4.6.7
Ground Overcurrent ..........................................................................................4-29
4.6.8
Phase Differential .............................................................................................4-30
4.6.9
Ground Directional ............................................................................................4-31
4.6.10
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
4.7.8
4.7.9
Loss of Excitation..............................................................................................4-42
4.7.10
Distance Element..............................................................................................4-43
4.8.1
4.8.2
Reactive Power.................................................................................................4-46
4.8.3
Reverse Power .................................................................................................4-47
4.8.4
Low Forward Power ..........................................................................................4-48
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
4.10.1
489 Thermal Model ...........................................................................................4-55
4.10.2
Model Setup......................................................................................................4-56
4.10.3
Thermal Elements.............................................................................................4-68
489 Generator Management Relay
GE Multilin