Schweitzer Engineering SEL-351P, Быстрый старт

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6-26 Close and Reclose Logic Date Code 990215
SEL-351P Manual Técnico
reset timer starts timing – when it times out, the shot counter returns back to shot = 0. But if
during this reset timer timing, the sequence coordination logic causes the shot counter to
increment again (e.g., from 1 to 2), the reset timer is fully loaded up again with reset time
79RSD.
Sequence coordination can increment the shot counter beyond last shot (unless limited by
SEL
OGIC
setting 79SEQ), but no further than shot = 4. The reset timer timing is subject to
SEL
OGIC
setting 79BRS [see Block Reset Timing (79BRS) earlier in this subsection].
See Figure 1.27 in Section 1: Factory-Set Logic for the 79SEQ factory settings and
accompanying example.
Fast curve-phase
[SEL-351P(2)]
I
F
F
I
I
51P1
t
Fast curve-phase
[51P1T; (SEL-351P(1)]
Delay curve-phase
[SEL-351P(2)]
Delay curve-phase
[SEL-351P(1)]
SEL-
351P(1)
SEL-
351P(2)
DWG: MP351P050
1 1
Figure SECTION 6: .8: SEL-351P Recloser Controls in Series, Requiring Sequence
Coordination
Reclose Supervision Setting (79CLS)
See Reclose Supervision Logic earlier in this section.