Sel 411L - Table 4.10 Leader;Follower Selection; Table 4.9 Example One: Reset State after Reclaim Time

P.4.19
Date Code 20151029 Protection Manual SEL-411L Relay
Autoreclosing and Synchronism-Check
Two-Circuit-Breaker Autoreclosing
Reset State After Reclaim Time
Circuit Breaker BK2 is manually closed and now becomes active as the leader
after 3PMRCD (Manual Close Reclaim Time Delay). Subsequent reclosing
occurs with BK2. Table 4.9 defines the logical state of the autoreclose logic at
this point.
Block Reclosing with Enable Settings
To block BK2 as leader use the enable settings; set ESPR2 := NBK2 and
E3PR2 := NBK2. With these enable settings BK2 never becomes the leader
circuit breaker.
Example Two: BK2 as Successful Follower and Dynamic Leader
Another example is similar to the first with SLBK1/SLBK2/FBKCEN at 1/0/1
(see Table 4.10).
FOLBK0 No Follower Breaker 1
FOLBK1 Follower Breaker = Breaker 1 0
FOLBK2 Follower Breaker = Breaker 2 0
Table 4.8 Example One: Lockout State (Sheet 2 of 2)
Relay Word Bit Description Logical State
Table 4.9 Example One: Reset State After Reclaim Time
Relay Word Bit Description Logical State
NBK0 No Active Breakers in Reclose Scheme 0
NBK1 One Breaker Active in Reclose Scheme 1
NBK2 Two Active Breakers in Reclose Scheme 0
LEADBK0 No Leader Breaker 0
LEADBK1 Leader Breaker = Breaker 1 0
LEADBK2 Leader Breaker = Breaker 2 1
FOLBK0 No Follower Breaker 1
FOLBK1 Follower Breaker = Breaker 1 0
FOLBK2 Follower Breaker = Breaker 2 0
Table 4.10 Leader/Follower Selection
Setting Label Value
SLBK1 1
SLBK2 0
FBKCEN 1