Sel SEL-421 - If Breaker BK1 Closes Successfully; If Breaker BK1 Does Not Close Successfully

R.2.42
SEL-421 Relay Reference Manual Date Code 20111215
Auto-Reclosing and Synchronism Check
Manual Closing
If breaker BK1 closes successfully, then:
➤ The unlatch close condition asserts (indicating breaker closure)
➤ And close logic output BK1CL deasserts
If breaker BK1 does not close successfully, then:
➤ The close failure timer times out (Relay Word bit BK1CFT
asserts momentarily)
➤ And close logic output BK1CL deasserts
Note in Figure 2.16 that if breaker BK1 manual close logic is actively
operating (as described in the preceding steps), then the breaker BK2 manual
close logic cannot be actively operating. The breaker BK2 manual close logic
only has a chance to operate if the breaker BK1 manual close logic is not
actively operating and two breakers are enabled for the scheme (global setting
NUMBK := 2). Thus, manually closing can only be attempted for one breaker
at a time.