GE P4A Technical Manual page 801

P54A/B/C/E
ORDINAL
291 Test Loopback
Loopback test in service (external or internal)
292 Test IM64
Indication that relay is in test mode
293 VTS Indication
VTS Indication
294 CT Fail Alarm
CTS indication alarm (CT supervision alarm)
296 Remote CT Alarm
CTS remote indication alarm (CT supervision alarm)
298 CB Fail Alarm
Circuit breaker fail alarm
299 CB Monitor Alarm
This alarm indicates that DDB CB I^ Maint (1106) or DDB CB OPs Maint. (1108) or DDB CB Time Maint. (1110)
300 CB Mon LO Alarm
This alarm indicates that DDB CB I^ Lockout (1107) or DDB CB Ops Lock (1109) or DDB CB Time lockout (1111)
301 CB Status Alarm
CB Status Alarm - set when CB status is determined by inputs from BOTH 52A and 52B type auxiliary contacts (setting "CB Status Input =
52A&52B-xPole), and both inputs are in the same state (both = 0 or both = 1) for time period => 5sec, indicating a problem with the auxiliary
switch mechanism).
302 CB Trip Fail
CB Failed to Trip - alarm set if CB does not trip within set Trip Pulse Time when CB trip command is issued.
303 CB Close Fail
CB Failed to Close - alarm set if CB fails to close within set Close Pulse Time when CB close command is issued
304 Man CB Unhealthy
ManCB1 Unhealthy - alarm set if CB1 remains "unhealthy" for CB Control set time "CB Healthy Time" when operator controlled CB1 close
sequence is initiated. (Please see description for CB Control setting "CB Healthy Time").
305 No C/S Man Close
No C/S Man Close - alarm set if selected system check conditions for manual closing CB1 remain unsatisfied for CB Control set time "Check
Sync Time" when operator controlled CB1 close sequence is initiated. (Please see description for CB Control setting "Check Sync Time").
306 A/R Lockout
A/R Lockout - alarm set when CB autoreclose is locked out.
307 A/R CB Unhealthy
A/R CB Unhealthy - alarm set if CB remains "unhealthy" for Autoreclose set time "CB Healthy Time" when CB close sequence is initiated by
autoreclose function. (Please see description for Autoreclose setting "CB Healthy Time").
308 A/R No Checksync
A/R No Checksync - alarm set if selected system check conditions for autoreclosing CB remain unsatisfied for Autoreclose set time "Check
Sync Time" when CB close sequence is initiated by autoreclose function. (Please see description for Autoreclose setting "Check Sync Time").
311 Signalling Fail
If a differential protection communication path has remained failed for a period which is longer than the "Comms Fail Timer", this alarm is
ON
312 Comm Delay Alarm
If successive calculated propagation delay times exceed time delay setting "Comm Delay Tol", this alarms is ON
313 C Diff Failure
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
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
Indicate that a differential protection has been inhibited
319 F out of Range
Frequency out of range alarm
334 Main Prot. Fail
Indicates a failure with the Co-Processor, this will affect the protections that run on this board, eg. current differential, phase comparision,
distance and DEF Protections.
335 Config Error
In three ended schemes on power up, the relays check to see if one of them should be configured out. Under some circumstances it is
P54xMED-TM-EN-1
SIGNAL NAME
DDB_LOOPBACK_TEST
DDB_IM64_TEST_MODE
DDB_VTS_INDICATION
DDB_CTS_INDICATION
DDB_REMOTE_CTS_INDICATION
DDB_BREAKER_FAIL_ALARM
DDB_CB_MONITOR_ALARM
DDB_CB_MONITOR_LOCKOUT
DDB_CB_STATUS_ALARM
DDB_CB_FAILED_TO_TRIP
DDB_CB_FAILED_TO_CLOSE
DDB_CONTROL_CB_UNHEALTHY
DDB_CONTROL_NO_CHECK_SYNC
DDB_AR_LOCKOUT
DDB_AR_CB_UNHEALTHY
DDB_AR_NO_CHECK_SYNC
DDB_SIGNALLING_FAILURE
DDB_PROPAGATION_DELAY_FAILURE
DDB_PROTECTION_FAILURE
DDB_FIB_IM_SCHEME_FAIL
DDB_IEEE_37_94
DDB_INHIBIT_CD_PROTECTION
DDB_FREQ_ALARM
DDB_MAIN_PROTECTION_FAIL
DDB_CONFIGURATION_ERROR
ELEMENT NAME
DESCRIPTION
Appendix B - Settings and Signals
B235