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(v) Initiation logic – setting (TREADY1, TRESET)
Figure 2.34-15 illustrates the initiation logic for CB#1, which has ‘ARC1 READY’ signal issued
by the reception of signals ‘ARC1-MODE=ON’ and ‘CB1_ALLPH_CLOSE’. Note that the user
should connect a ready signal of the CB with PLC connection point ‘CB1-ARC READY’ using
the BI circuit. Reclaim timer [TREADY1] is provided; the flip-flop is set to issue ‘ARC1 IN-
PROG’ signal when signals ‘ARC_READY’, ‘SHOT_1ST’ and ‘ARC1 START’ are provided.
‘ARC1-S1 IN-PROG’ signal succeeds followed by the ‘ARC1 IN-PROG’ signal.
Shot1–Shot5 logics for CB#1
To CB#2 bridge, Final trip logic
Figure 2.34-15 Initiation and its outside logics
If the ‘ARC1 UNREADY’ signal is present, Initiation logic abandons to reclose the CB#1;
then, the status of the ARC function reaches the Final Trip stage (FT); three-phase trip signal
(CB1_94TT) is generated transferred for the TRC function.
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