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CHAPTER 3: INTERFACES
Self-test errors
CAUTION:
345 TRANSFORMER PROTECTION SYSTEM – QUICKSTART GUIDE
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 3-6: Typical Self-test warning
A4 TARGET MESSAGES
Table 3-1: Minor Self-test Errors
Self-test Error
Latched
Message
Target
Message?
MAINTENANCE
No
ALERT: IRIG-B
Failure
MAINTENANCE
No
ALERT: Clock
Not Set
MAINTENANCE
No
ALERT: Comm
Alert 1, 2, or 3
MAINTENANCE
No
ALERT:
Ethernet Link
Fail
UNIT FAILURE:
Contact Factory:
Error code:1
Description of
How Often the Test
Problem
is Performed
A bad IRIG-B input
Every 5 seconds*
signal has been
detected.
Clock time is the
Every 5 seconds*
same as the default
time.
Communication
Every 5 seconds*
error between CPU
and Comms board.
Communication
Detected
error between
Instantaneously
345 and Network.
FRONT CONTROL PANEL INTERFACE
What to do
Ensure IRIG-B cable is
connected, check cable
functionality (i.e. physical
damage or perform
continuity test), ensure
IRIG-B receiver is
functioning, and check
input signal level (it may
be less than specification).
If none of these apply,
contact the factory.
Set the date and time in
PRODUCT SETUP.
If alert doesn't self-reset,
then contact factory.
Otherwise monitor
reccurences as errors are
detected and self-reset.
Check Ethernet cable and
Ethernet connection.
Check health of the
network. Check status of
external routers and
switches.
43
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