CHAPTER 4: SETPOINTS
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
2-Speed Motor Elements
•
2-Speed Thermal Model
•
2-Speed Acceleration
•
2-Speed Undercurrent
Current Elements
•
Phase Time Overcurrent Protection (51P)
•
Phase Instantaneous Overcurrent Protection (50P)
•
Phase Directional Overcurrent Protection (67P)
•
Neutral Time Overcurrent Protection (51N)
•
Neutral Instantaneous Overcurrent Protection (50N)
•
Neutral Directional Overcurrent Protection (67N)
•
Ground Time Overcurrent Protection (51G)
•
Ground Instantaneous Overcurrent Protection (50G)
•
Negative Sequence Instantaneous Overcurrent Protection (50_2)
Voltage Elements
•
Phase Reversal (47)
•
Undervoltage Curves
•
Phase Undervoltage Protection (27P)
•
Phase Overvoltage Protection (59P)
•
Auxiliary Undervoltage (27X)
•
Auxiliary Overvoltage Protection (59X)
•
Neutral Overvoltage Protection (59N)
•
Negative Sequence Overvoltage Protection (59_2)
•
Volts per Hertz (24)
Impedance Elements
•
Out-of-step (78)
Power Elements
•
Directional Power (32)
•
Reactive Power (40Q)
Frequency Elements
•
Underfrequency (81U)
•
Overfrequency (81O)
•
Frequency Rate of Change (81R)
PROTECTION
4–109