ABB RELION 620 Series Technical Manual page 745

1MAC504801-IB E
620 series ANSI
Technical Manual
A070887 V1 EN
Figure 376: Autoreclosing sequence with two shots
t Time delay of high-speed autoreclosing, here:
HSAR
t Time delay of delayed autoreclosing, here:
DAR
t Operating time for the protection stage to clear the fault
Protection
t Operating time for opening the circuit breaker
CB_O
t Operating time for closing the circuit breaker
CB_C
In this case, the sequence needs two CBBs. The reclosing times for shot 1 and shot 2 are
different, but each protection function initiates the same sequence. The CBB sequence is
described in Table 537 as follows:
GUID-A9DFEA78-6500-46BA-96A4-8A39966BE0B0 V1 EN
Figure 377: Two shots with three initiation lines
Section 9
Control functions
First reclose time
Second reclose time
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