P74x/EN PL/N
1, P742, P743
(PL) 7-
Relay
English Text Type Source Description
Fibre optic Maximum primary current encoding
exceeded
Fault in the dead zone on the neutral
Fault in the dead zone on a phase
Variation detected on phase A (not used)
Variation detected on phase B (not used)
Variation detected on phase C (not used)
Variation detected on the neutral (not used)
protection)
Allows external protection to initiate breaker fail (if
PSL (50BF Backtrip
protection)
50BF Backtrip order from an other protection
Retrip of phase A due to an external trip initiation
of this phase (at tBF3)
Retrip of phase B due to an external trip initiation
of this phase (at tBF3)
Retrip of phase C due to an external trip initiation
of this phase (at tBF3)
protection)
Allows external protection to initiate breaker fail (if
protection)
Allows external protection to initiate breaker fail (if
protection)
Allows external protection to initiate breaker fail (if
Trigger for the Fault Recorder
Fibre communication to the CU error
Warning: fibre communication to be changed
48V Field Voltage Failure
Programmable Function Key LED 1 Green is
energized
Assignment of signal to drive output Function Key
LED 1 Green.
This LED is associated with Function Key 1.
To drive function key LED, yellow DDB 692 and
DDB 693 must be active at the same time
Programmable Function Key LED 1 Red is
energized
Assignment of signal to drive output Function Key
LED 1 Red.
This LED is associated with Function Key 1
Programmable Function Key LED 10 Green is
energized
Assignment of signal to drive output Function Key
LED 10 Green.
This LED is associated with Function Key 10.
To drive function key LED1 yellow, DDB 710 and
DDB 711 must be active at the same time
Programmable Function Key LED 10 Red is
energized
Red
Assignment of signal to drive output Function Key
LED 10 Red.
This LED is associated with Function Key 10
When the forced positions of the CB and the
Isolators are used (during commissioning test)
Function Key 1 is activated.
In ‘Normal’ mode it is high on key press and in
‘Toggle’ mode remains high/low on single key
Function Key 10 is activated.
In ‘Normal’ mode it is high on key press and in
‘Toggle’ mode remains high/low on single key
The IED is not subscribed to a publishing IED in
the current scheme
Allows user to control a binary signal which can be
mapped via SCADA protocol output to other
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