P74x/EN PL/N
1, P742, P743
(PL) 7-
Relay
English Text Type Source Description
Phase A Circuit Breaker Trip (Init 50BF TBF3 /
TBF4), Logical OR of :
O/C Protection, External Trip A, External Trip
Phase B Circuit Breaker Trip (Init 50BF TBF3 /
TBF4), Logical OR of :
O/C Protection, External Trip B, External Trip
Phase C Circuit Breaker Trip (Init 50BF TBF3 /
TBF4), Logical OR of :
O/C Protection, External Trip C, External Trip
Indication of discrepancy between the 52a and
52b auxiliary contacts of the Circuit Breaker
Circuit Breaker Failed to Close
(after a manual/operator close command)
Circuit Breaker Failed to Trip
(after a manual/operator trip command)
Control Close in Progress
The relay has been given an instruction to close
the circuit breaker, but the Manual Close timer
Delay has not yet finished timing out
Control Close command to the circuit breaker.
Operates for a manual close command (menu,
Operator trip instruction to the circuit breaker,
via menu, or SCADA. (Does not operate for
protection element trips)
Any Trip (Logical OR of ddbs:
0, 1, 2, 168, 169, 170, 171, 256, 261)
Input to Auxiliary Timer 1
Input to Auxiliary Timer 16
Output from Auxiliary Timer 1
All setting changes and most command/control
actions blocked for Rear Port 1.
signal
All setting changes and most command/control
actions blocked for Rear Port 2 (when option
signal
All setting changes and most command/control
actions blocked for the Ethernet port (when
87BB Phase Fault detected in phase A
87BB Phase Fault detected in phase B
87BB Phase Fault detected in phase C
87BB earth Fault detected
Output from Auxiliary Timer 16
Trigger for the Fault Recorder
Front panel Battery Failure
48V Field Voltage Failure
The IED is not subscribed to a publishing IED in
the current scheme
Ethernet board not fitted
Ethernet board not responding
Ethernet board unrecoverable error
Ethernet card software reload Alarm
Bad TCP/IP configuration alarm
Bad OSI configuration alarm
Ethernet board software not compatible with
main CPU
The IP address of the IED is already used by
another IED
InterMiCOM indication that Loopback testing is
in progress
InterMiCOM Message Failure Alarm