Programmable Logic P54x/EN PL/La4
MiCOM P543, P544, P545 & P546
(PL) 7-17
PL
DDB no. English text Source Description
293 VT Fail Alarm VT Supervision
VTS indication alarm- failed VT (fuse blow)
detected by VT supervision
294 CT Fail Alarm CT Supervision
CTS indication alarm (CT supervision alarm)
In the cases of two CTs:
- If standard CTS is used, this indication is
ON in case of failure on any of the CTs
- If Diff CTS is used this indication is ON in
case of failure on CT1
295 CT2 Fail Alarm CT Supervision
CT2S indication alarm (CT supervision alarm).
This indication is ON If Diff CTS is used and
there is a failure on CT2
P544 and P546 only
296 Remote CT Alarm CT Supervision
CTS remote indication alarm (CT supervision
alarm)
297 Power Swing Powerswing Blocking
Powerswing blocking will block any distance
zone selected in the setting file
298 CB Fail Alarm CB Fail Circuit breaker fail alarm
299 CB Monitor Alarm CB Monitoring
This alarm indicates that DDB I ^ Maint. Alarm
(1106) or DDB CB OPs Maint. (1108) or DDB
CB Time Maint. (1110)
300 CB Lockout Alarm CB Monitoring
This alarm indicates that DDB I ^ Lockout
Alarm (1107) or DDB CB Ops Lock (1109) or
DDB CB Time lockout (1111)
301 CB Status Alarm CB Status
Indication of problems by circuit breaker state
monitoring - example defective auxiliary
contacts
302 CB Trip Fail CB Control
Circuit breaker failed to trip (after a
manual/operator) trip command
303 CB Close Fail CB Control
Circuit breaker failed to close (after a
manual/operator or auto-reclose close
command)
304 Man CB Unhealthy CB Control
Manual circuit breaker unhealthy output signal
indicating that the circuit breaker 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)
305 No C/S Man Close CB Control
Indicates that the check synchronism signal
has failed to appear for a manual close
306 A/R Lockout Auto-reclose
Indicates an auto-reclose lockout condition -
no further auto-reclosures possible until
resetting
307 A/R CB Unhealthy Auto-reclose
Auto-reclose circuit breaker unhealthy signal,
output from auto-reclose logic. Indicates
during auto-reclose in progress, if the circuit
breaker has to become healthy within the
circuit breaker healthy time window
308 A/R No Checksync Auto-reclose
Indicates during auto-reclose in progress, if
system checks have not been satisfied within
the check synchronizing time window
309 System Split Check sync
System split alarm - will be raised if the system
is split (remains permanently out of
synchronism) for the duration of the system
split timer
310 GPS Alarm C Diff Indicates that GPS is lost
311 Signaling fail C Diff
If a differential protection communication path
has remained failed for a period which is
longer than the “Comms Fail Timer”, this alarm
is ON
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