P74x/EN PL/N
1, P742, P743
(PL) 7-
Relay
English Text Type Source Description
87BB fault detected in zone 1 by the phase
differential element
87BB fault detected in zone 8 by the phase
differential element
87BB fault detected in zone 1 by the SEF
differential element
87BB fault detected in zone 8 by the SEF
differential element
87BB SEF Busbar
Protection
To disable all the protections (CU & PU)
This is an alarm that is ON if any setting fail
during the setting changing process. If this
happens, the relay will use the last known good
Bad OSI configuration alarm
Bad TCP/IP configuration alarm
Front panel Battery Failure
To Block 87BB phase & Earth algorithms
Reset circuitry fault alarm and / or blocking
Circuitry fault on the Check Zone
Circuitry fault alarm in zone 1
Circuitry fault alarm in zone 8
Circuitry fault Alarm on 1 or several zones
Logical OR of DDB 168 to 175
Circuitry fault on the neutral
Circuitry fault blocking the Check Zone
Circuitry fault blocking of zone 1
Circuitry fault blocking of zone 8
Circuitry fault blocking Zone x
Logical OR of DDB 160 to 239
Circuitry fault in phase A
Circuitry fault in phase B
Circuitry fault in phase C
Valid Setting configuration
Control Input 1 - for SCADA and menu
commands into PSL
Control Input 32 - for SCADA and menu
commands into PSL
Virtual Signal 01 from the CU to all the PUs via
the fibre optic
Virtual Signal 16 from the CU to all the PUs via
the fibre optic
Differential sensitive earth fault current
PU communication error: channel 1 board A
PU communication error: channel 1 board G
PU communication error: channel 2 board A
PU communication error: channel 2 board G
PU communication error: channel 3 board A
PU communication error: channel 3 board G
PU communication error: channel 4 board A
PU communication error: channel 4 board G
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