Section 7
1MAC050144-MB C
Control functions
506
615 series ANSI
Technical Manual
Figure 275:
Autoreclose 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
as follows:
Figure 276:
Two shots with three initiation lines
Table 421: Settings for configuration example 1
Example 2
There are two separate sequences implemented with three shots. Shot 1 is implemented by
CBB1 and it is initiated with the high stage of the overcurrent protection (50P-1). Shot 1
is set as a high-speed autoreclosing with a short time delay. Shot 2 is implemented with
Setting name
Setting value
Shot number CBB1
1
Init signals CBB1
7 (lines 1,2 and 3 = 1+2+4 = 7)
First reclose time
0.3s (an example)
Shot number CBB2
2
Init signals CBB2
7 (lines 1,2 and 3 = 1+2+4 = 7)
Second reclose time
15.0s (an example)
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