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General-trip-signal production
(ii)
Figure 2.23-3 illustrates the trip-signal generation logic within the TRC logic. The user can
program the generation of a trip signal using the PLC connection point "ADD_OPT_COM",
when trip signals are not available from the relay functions.
The "GEN.TRIP" signal is transferred to the ARC function to initiate the reclose
operation of the CB.
830000EBB2
Trip-command collection scheme
810000EBB1
820000EBB0
From CBF function
CBF-RETRIP
Figure 2.23-3 Logic for general trip and CB trip signal
Acquisition of fail-safe signal provided externally
If an external relay is available to provide a fail-safe check for the internal operation of the
IED, and the user wishes to use the output of the external relay in order to enhance the
reliability of tripping further, then the PLC connection points 'ADD-FS' and 'USE-FS' can be
used in the Trip-signal generation scheme. That is, the external check signal is connected at
the 'ADD-FS' point; the 'On/Off ' state of the external relay should also be connected using
'USE-FS'.
Acquisition of external trip command
As the PLC connection point 'ADD_OPT_COM' is provided, the TRC function can accept a trip
command that is generated externally.
CB trip signal production
(iii)
As illustrated in Figure 2.23-3, the 'TRIP COMMMAND' signal is transferred to trip coils of
the CB when the signals "OPT-TRIP-A, -B, and -C" or "OPT-TRIP" enter into the TRC function.
Output signals
TRIP-COMMMAND
Sub-signal generation
(iv)
In a similar way to Trip-command collection, the Sub-signal generation scheme groups the
ADD_OPT_COM
8000001B60
OPT-TRIP-A
8100001B61
OPT-TRIP-B
8200001B62
OPT-TRIP-C
8300001B63
OPT-TRIP
ADD-FS
1
USE-FS
Table 2.23-4 Output signals for CB
- 265 -
≥1
8300001B6F
&
≥1
≥1
Usage of signals
CB trip in three-phase
6F2T0207 (0.01)
To Alarm signal generation
GEN.TRIP
To ARC-D function
GEN.TRIP
To CB
8300001B78
TRIP COMMAND
≥1
GRE200 (5,6)
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