GE P54C User Manual

5.8.1 AUTORECLOSE IN PROGRESS LOGIC DIAGRAM
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External Trip A
External Trip B
External Trip C
External Trip3 ph
Init AR
CB ARIP
AR Start
CB1 OpAny
1
TMEM2/3Ph
AR Start
0.02
0
&
1
&
&
Set CB Close
CB Closed 3 ph
TMEM1Ph
CB1 Op2/3P
&
1
CB1L3 PAROK
&
&
Inhibit AR
Lockout Alarm
1
CB NoAR
CB1 ARSUCC
CBARCancel
R
Q
S
AR Initiation
CB ARIP
ARIP
CB1 LARIP
CB1 AR OK
Figure 69: Autoreclose In Progress logic diagram (Module 16)
5.9 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.
P54A/B/C/E Chapter 7 - Autoreclose
P54xMED-TM-EN-1 157

GE P54C Specifications

General

Brand	GE
Model	P54C
Category	Relays
Language	English