GE Industrial Solutions Entellisys 5.0 User Manual User 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