GE Industrial Solutions Entellisys 4.0 System User Manual - Manual (Page 78)

Single point functions 78
5
Figure 5-7 Settings for Under Frequency Relay
5.2.4.5 Usage
Event logging
While the relay is functional, the following events are logged for the under frequency relay in the
Entellisys CPU:
•
Alarm Pickup Under Frequency – Alarm only under frequency relay has entered pickup.
•
Alarm Under Frequency – Alarm only under frequency relay has operated.
•
Alarm Dropout Under Frequency – Alarm only under frequency relay has dropped out of
pickup.
•
Voltage Below Underfreq Alarm Blocking Voltage – The voltage has dropped below the alarm
only under frequency blocking voltage threshold.
•
Voltage Above Underfreq Alarm Blocking Voltage – The voltage has exceeded the alarm only
under frequency blocking voltage threshold.
•
Pickup Under Frequency – Under frequency relay has entered pickup.
•
Breaker Trip Under Frequency – Under frequency relay has operated.
•
Dropout Under Frequency – Under frequency relay has dropped out of pickup.
•
Voltage Below Under Frequency Blocking Voltage – The voltage has dropped below the
under frequency blocking voltage threshold.
•
Voltage Above Under Frequency Blocking Voltage – The voltage has exceeded the under
frequency blocking voltage threshold.
To view these events, click Sequence of Events on the Main Menu.