GE Industrial Solutions Entellisys 5.0 User Manual - Manual (Page 286)

Alarms and events 274
A
Pickup Reverse Power Reverse power relay has entered pickup
Breaker Trip Reverse Power Reverse power relay has operated
Dropout Reverse Power Reverse power relay has dropped out of pickup
Alarm Pickup Underfrequency Alarm only underfrequency relay has entered
pickup
Alarm Underfrequency Alarm only underfrequency relay has operated
Alarm Dropout Underfrequency Alarm only underfrequency relay has dropped out
of pickup
Voltage Below Underfreq Alarm
Blocking Voltage The voltages on all three phases have dropped
below the alarm only underfrequency blocking
voltage threshold.
Voltage Above Underfreq Alarm
Blocking Voltage The voltage on at least one of the three phases has
exceeded the alarm only underfrequency blocking
voltage threshold.
Pickup Underfrequency Underfrequency relay has entered pickup
Breaker Trip Underfrequency Underfrequency relay has operated
Dropout Underfrequency Underfrequency relay has dropped out of pickup
Voltage Below Underfrequency
Blocking Voltage The voltages on all three phases have dropped
below the underfrequency blocking voltage
threshold.
Voltage Above Underfrequency
Blocking Voltage The voltage on at least one of the three phases has
exceeded the underfrequency blocking voltage
threshold.
Alarm Pickup Overfrequency Alarm only overfrequency relay has entered pickup
Alarm Overfrequency Alarm only overfrequency relay has operated
Alarm Dropout Overfrequency Alarm only overfrequency relay has dropped out of
pickup
Voltage Below Overfreq Alarm
Blocking Voltage The voltages on all three phases have dropped
below the alarm only overfrequency blocking
voltage threshold.
Voltage Above Overfreq Alarm
Blocking Voltage The voltage on at least one of the three phases has
exceeded the alarm only overfrequency blocking
voltage threshold.
Pickup Overfrequency Overfrequency relay has entered pickup
Breaker Trip Overfrequency Overfrequency relay has operated
Table A-9 Protection Relay Events
Event Description Notes and Troubleshooting tips