Self-Test Errors - GE Multilin 350 Series Instruction Manual

CHAPTER 3: INTERFACES
CAUTION:
CAUTION
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
Cause <Function>
The first line contains information of the cause of operation (the name of the operated
element), and the element function.
State: Operate
This line from the display shows the state of the element: Pickup, Operated, Alarm.
Phase: A
The last line from the display shows the phase that picked up or operated.

3.1.5.2 Self-test errors

The relay performs self diagnostics at initialization (after power up), and continuously as a
background task to ensure that the hardware and software are 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 errors indicate a problem with the relay which takes it out of service.
Self-Test Warnings may indicate a serious problem with the relay hardware!
Upon detection of a minor problem, the relay will:
• Turn on the "TROUBLE" LED at the same time as the "IN SERVICE" LED is on.
• Display the error on the relay display.
• Record the minor self-test error in the Event Recorder.
Upon detection of a major problem, the relay will:
• De-energize critical failure relay (Output Relay 7).
• Inhibit operation of all other output relays (1 to 6).
• Turn off the "IN SERVICE" LED; turn on the "TROUBLE" LED.
• Flash the "ALARM" LED.
• Display the cause of major self-test failure.
• Record the major self-test failure in the Event Recorder.
Figure 3-5: Typical Self-test warning
A4 TARGET MESSAGES
Ph IOC1 Trip
State: Operate
▼
Phase:A
A4 TARGET MESSAGES
UNIT FAILURE:
Contact Factory:
Error code:1
FRONT CONTROL PANEL INTERFACE
3–7