Sel 411L - Figure 4.11 One Circuit Breaker Three-Pole Cycle State (79 CY3)

P.4.30
SEL-411L Relay Protection Manual Date Code 20151029
Autoreclosing and Synchronism-Check
Autoreclose Logic Diagrams
Figure 4.11 One Circuit Breaker Three-Pole Cycle State (79CY3)
12
3
6
9
12
3
6
9
12
3
6
9
12
3
6
9
to Beginning
of 79CY3
Reset State
(BK1RS)
Lockout
(BK1LO)
Lockout
(BK1LO)
3PARC
Is Breaker
Allowed to Close?
(3P1CLS=1?)
Is Block Reclaim
Time (79BRCT) Asserted?
Did Breaker Close?
Yes
Timed
Out
Timed
Out
Timed Out
Breaker Open
Close
Supervision Delay
Three-Pole Open
Interval Timer
(3POIDn)
No
Timing
BK1CL
No
Timing
Yes
3PARC
Timing
Breaker Close
Failure Timer (BKCFD)
Three-Pole
Reclaim Timer
(3PRCD)
(BK1CLSD)
No
Yes
Increment Shot Counter
and Issue CLOSE Command
3PARC
Lockout
(BK1LO)
Timed Out
79CY3
79CY3
Yes
No
No
3POLINE
Is Skip Shot
Asserted?
Has the Line
Opened 3 Pole?
Increment Shot.
Is Shot Count Greater
Than or Equal to the
Number of set Reclosures?
Yes
(3PLSHT)
Lockout
(BKnLO)
3PRIH
Timeout
12
3
6
9
3PRIH = OFF
Yes