ABB RELION 620 Series Technical Manual page 747

1MAC504801-IB E
620 series ANSI
Technical Manual
A071272 V1 EN
Figure 378: Autoreclosing sequence with two shots with different shot settings
according to initiation signal
t Time delay of high-speed autoreclosing, here:
HSAR
t Time delay of delayed autoreclosing, here:
DAR
t Operating time for the 50P-1 protection stage to clear the fault
l>>
t or Operating time for the 51P or 51N/G protection stage to clear the fault
l> lo>
t Operating time for opening the circuit breaker
CB_O
t Operating time for closing the circuit breaker
CB_C
In this case, the number of needed CBBs is three, that is, the first shot's reclosing time
depends on the initiation signal.
Section 9
Control functions
First reclose time
Second reclose time
741