ABB RER620 Technical Manual page 317

1MAC309294-MB F
RER620
Technical Manual
Example 1
The sequence is implemented by two shots which have the same reclose time for all
protection functions, namely 50P-1, 51P and 51N/G. The initiation of the shots is done by
activating the trip signals of the protection functions.
Figure 162: Autoreclose 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
as follows:
Figure 163: Two shots with three initiation lines
Table 295: Settings for configuration example 1
Setting name
Shot number CBB1
Init signals CBB1
First reclose time
Shot number CBB2
Init signals CBB2
Second reclose time
Control functions
First reclose time
Second reclose time
Setting value
1
7 (lines 1,2 and 3 = 1+2+4 = 7)
0.3s (an example)
2
7 (lines 1,2 and 3 = 1+2+4 = 7)
15.0s (an example)
Section 5
311