GE MiCOM P40

5.9.2 AUTORECLOSE IN PROGRESS LOGIC DIAGRAM FOR CB2
V03324
CB2 ARIP
CB2 Ext Trip A
CB2 Ext Trip B
CB2 Ext Trip C
CB2 Ext Trip 3ph
CB2 OpAny
1
CB2 TMEM2/3Ph
AR Start
0.02
0 &
1
&
&
Set CB2 Close
CB2 Closed 3 ph
CB2 TMEM1Ph
CB2 Op2/3P
&
1
CB2L3 PAROK
CB2F3 PAROK
1
&
&
Inhibit AR
CB2 LO Alarm
1
CB2 NoAR
CB2 ARSUCC
CBARCancel
R
Q
S
CB2 AR Init
CB2 ARIP
CB2 LARIP
CB2 FARIP
Leader CB2
Follower CB2
1
&
&
Init AR
Figure 164: Autoreclose In Progress logic diagram for CB2 (Module 17)
5.10
SEQUENCE COUNTER
The Autoreclose logic includes a counter for counting the number of Autoreclose shots. This is referred to as the
sequence counter. The sequence counter has a value of zero if Autoreclose is not in progress. Following a trip, and
subsequent Autoreclose initiation, the sequence counter is incremented. The counter provides output signals
indicating how many initiation events have occurred in any Autoreclose cycle. These signals are available as user
indications and are used in the logic to select the appropriate dead times or, for a persistent fault, force a lockout.
It is possible to skip the first Autoreclose attempt by enabling the AR Skip Shot 1 setting. If this is set, the sequence
counter will skip the first Autoreclose attempt (Shot 1) and move to the second (Shot 2) immediately upon
Autoreclose initiation. Each time the protection trips the sequence counter is incremented by 1. The Autoreclose
logic compares the sequence counter value to the number of Autoreclose shots setting AR Shots. If the counter
value exceeds this setting then the Autoreclose is locked out. If Autoreclose is successful, the sequence counter
resets to zero.
Chapter 11 - Autoreclose P446SV
304 P446SV-TM-EN-1