A070887 V1 EN
Figure 520: Autoreclosing sequence with two shots
t
HSAR
Time delay of high-speed autoreclosing, here:
First reclose time
t
DAR
Time delay of delayed autoreclosing, here:
Second reclose time
t
Protection
Operating time for the protection stage to clear the fault
t
CB_O
Operating time for opening the circuit breaker
t
CB_C
Operating time for closing the circuit breaker
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 905 as follows:
GUID-A9DFEA78-6500-46BA-96A4-8A39966BE0B0 V1 EN
Figure 521: Two shots with three initiation lines
Section 9 1MAC059074-MB A
Control functions
1020 615 series ANSI
Technical Manual
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