Diagnostic Messages; Self-Test Warnings - GE 750 Instruction Manual

750/760
Feeder Management Relay

Diagnostic Messages

Self-Test Warnings

WARNING
4–6
Pressing the OPEN key will attempt to open the breaker connected to the Trip Relay
by closing the contact. Likewise, the CLOSE key will attempt to close the breaker
connected to the Close Relay by closing the contact. The OPEN and CLOSE keys only
operate when the relay is in local mode; local mode can be enabled with a user
programmed logic input.
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 LED flashes when there are
diagnostic messages available; press the MENU key until the relay displays
, then press the MESSAGE
MESSAGES
through the messages. The following shows the format of the various diagnostic
messages.
These messages show any elements that are presently
PICKUP: <F>
picked up.
< Cause >
These messages indicate that an element has tripped.
TRIP: <F>
The message remains in the diagnostic queue until the
< Cause >
relay is reset.
These messages show any elements that are presently
ALARM: <F>
operating and have been programmed to have an alarm
< Cause >
function. When an element is programmed to Latched
Alarm, this message remains in the diagnostic queue
after the alarm condition clears until the relay is reset.
These messages show any self-test warnings.
SELF-TEST WARNING:
< Cause >
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 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 LED.
• Inhibit operation of all output relays.
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key, followed by the MESSAGE
Relay Messages
TARGET
key, to scroll
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