P54x/EN PL/La4 Programmable Logic
(PL) 7-18
MiCOM P543, P544, P545 & P546
PL
DDB no. English text Source Description
312 Comm Delay Alarm C Diff
If successive calculated propagation delay
times exceed time delay setting “Comm Delay
Tol”, this alarms is ON
313 C Diff Failure C Diff
It indicates that differential protection
communications are completely lost and
therefore C diff does not work
314 IM64 SchemeFail
It indicates that communications between
relays are completely lost and therefore IM64
does not work
315 IEEE C37.94 Fail C Diff
It will appear in case of at least one of the
following: CH1 (or CH2) loss of signal, CH1 (or
CH2) PATH_YELLOW or CH1 (or CH2)
BAD_RX_N
316 C Diff Inhibited C Diff
Indicate that a differential protection has been
inhibited
317 Aid 1 Chan Fail PSL
Aided channel scheme 1 - channel out of
service indication, indicating channel failure
318 Aid 2 Chan Fail PSL
Aided channel scheme 2 - channel out of
service indication, indicating channel failure
319 F out of Range Frequency Tracking Frequency out of range alarm
320
CB2 Fail Alarm CB2 Fail
Circuit breaker 2 fail alarm
P544 and P546 only
321 CB2 Monitor Alm CB2 Monitoring
This alarm indicates that DDB CB2 I ^ Maint.
Alarm (1113) or DDB CB2 OPs Maint. (1115)
or DDB CB2 Time Maint. (1117)
P544 and P546 only
322 CB2 Mon LO Alarm CB2 Monitoring
This alarm indicates that DDB CB2 I ^ Lockout
Alarm (1114) or DDB CB Ops Lock (1116) or
DDB CB Time lockout (1118)
P544 and P546 only
323 CB2 Status Alarm CB2 Status
Indication of problems by circuit breaker 2
state monitoring - example defective auxiliary
contacts
P544 and P546 only
324 CB2 Trip Fail CB2 Control
Circuit breaker 2 failed to trip (after a
manual/operator) trip command
P544 and P546 only
325 CB2 Close Fail CB2 Control
Circuit breaker 2 failed to close (after a
manual/operator or auto-reclose close
command)
P544 and P546 only
326 Man CB2 Unhealthy CB2 Control
Manual circuit breaker unhealthy output signal
indicating that the circuit breaker 2 has not
closed successfully after a manual close
command. (A successful close also requires
The circuit breaker healthy signal to reappear
within the "healthy window" timeout)
P544 and P546 only
327 NoCS CB2ManClose CB2 Control
Indicates that the check synchronism signal
has failed to appear for a manual close
P544 and P546 only
328 AR CB2 Lockout CB2 Auto-reclose
Indicates an auto-reclose lockout condition -
no further auto-reclosures possible until
resetting
P544 and P546 only
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