GE Industrial Solutions Entellisys 5.0 User Manual - Manual (Page 285)

Alarms and events description and system troubleshooting guide 273
A
Relays - Overvoltage and Phase Loss
Alarm Dropout Overvoltage Alarm only overvoltage relay has dropped out of
pickup
Pickup Overvoltage Overvoltage relay has entered pickup
Breaker Trip Overvoltage Overvoltage relay has operated
Dropout Overvoltage Overvoltage relay has dropped out of pickup
Alarm Pickup Phase Loss Alarm only phase loss relay has entered pickup
Alarm Phase Loss Alarm only phase loss relay has operated
Alarm Dropout Phase Loss Alarm only phase loss relay has dropped out of
pickup
Voltage Below Phase Loss Alarm
Blocking Voltage The voltages on all three phases have dropped
below the alarm only phase loss blocking voltage
threshold.
Voltage Above Phase Loss
Alarm Blocking Voltage The voltage on at least one of the three phases has
exceeded the alarm only phase loss blocking
voltage threshold.
Pickup Phase Loss Phase loss relay has entered pickup
Breaker Trip Phase Loss Phase loss relay has operated
Dropout Phase Loss Phase loss relay has dropped out of pickup
Voltage Below Phase Loss
Blocking Voltage The voltages on all three phases have dropped
below the phase loss blocking voltage threshold.
Voltage Above Phase Loss
Blocking Voltage The voltage on at least one of the three phases has
exceeded the phase loss blocking voltage
threshold.
Relays - High Current
Alarm Pickup High Current High current relay has entered pickup
Alarm High Current High current relay has operated
Alarm Dropout High Current High current relay has dropped out of pickup
Relays - Frequency and Reverse Power
Alarm Pickup Reverse Power Alarm only reverse power relay has entered pickup
Alarm Reverse Power Alarm only reverse power relay has operated
Alarm Dropout Reverse Power Alarm only reverse power relay has dropped out of
pickup
Table A-9 Protection Relay Events
Event Description Notes and Troubleshooting tips