GE Power Management 750/760 Feeder Management Relay 5-
5
5 FRONT PANEL OPERATION 5.4 MESSAGES
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5.4 MESSAGES 5.4.1 DIAGNOSTIC MESSAGES
Diagnostic messages are automatically displayed for any active conditions in the relay such as trips, alarms, or
asserted logic inputs. These messages provide a summary of the present state of the relay. The MESSAGE
indicator flashes when there are diagnostic messages available; press the key to scroll through the
messages. The following shows the format of the various diagnostic messages.
5.4.2 SELF-TEST WARNINGS
The relay performs self diagnostics at initialization (after power-up), and continuously as a background task to
ensure that every testable unit of the hardware and software is alive and functioning correctly. There are two
types of self-test warnings indicating either a minor or major problem. Minor problems indicate a problem with
the relay that does not compromise protection of the power system. Major problems indicate a very serious
problem with the relay which comprises all aspects of relay operation.
SELF-TEST WARNINGS MAY INDICATE A SERIOUS PROBLEM WITH THE RELAY
HARDWARE!
Upon detection of either a minor or major problem, the relay will:
• De-energize the 8 SELF-TEST WARNING relay.
• Indicate the failure in the diagnostic message queue.
• Record the failure in the EVENT RECORDER.
Upon detection of a major problem, the relay will (if possible) also:
• Turn off the RELAY IN SERVICE indicator.
•
Inhibit operation of all output relays
.
PICKUP: <
Φ
>
< Cause >
These messages show any elements that are presently picked up.
TRIP: <
Φ
>
< Cause >
These messages indicate that an element has tripped. The message
remains in the diagnostic queue until the relay is reset.
ALARM: <
Φ
>
< Cause >
These messages show any elements that are presently operating and have
been programmed to have an alarm function. When an element is pro-
grammed to Latched Alarm, this message remains in the diagnostic queue
after the alarm condition clears until the relay is reset.
SELF-TEST WARNING:
< Cause >
These messages show any self-test warnings.
NEXT
WARNING
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