Num CBs
CB1 only
CB2 only
Both CB1&CB2
AR in Service
AR Enable CB1
AR Enable CB2
1
&
&
&
AR Mode
AR 1P
AR 1/3P
AR 3P
AR Opto
1
&
&
AR Mode 1P
AR Mode 3P
1
&
&
&
&
Lead/Foll ARMode
L 1P, F 1P
L 1P, F 3P
L 3P, F 3P
AR Opto
L 1/3P, F 1/3P
L 1/3P, F 3P
1
1
1
1
&
&
&
&
Foll SPAROK
Foll3 PAROK
AR Mode 1P
AR Mode 3P
Foll AR Mode 1P
Foll AR Mode 3P
&
&
&
&
See Note Invalid AR Mode
5s
0
Invalid AR Mode
Seq Counter = 0
Seq Counter = 1
Leader CB1
AR Enable CB1
1
1
&
&
&
&
Leader CB2
AR Enable CB2
1
1
1
* If not mapped in PSL,
AR Enable
CB1 and AR Enable CB 2 default to
high
When Leader/Follower AR mode is
set via opto -inputs, there are 7
invalid combinations. This logic
detects these combinations and on
a trip forces both CB 1 and CB2 to
lockout.
1P 3P 1P 3P
0 0 0 1
0 0 1 0
0 0 1 1
0 1 1 0
0 1 1 1
1 0 1 1
1 1 1 0
&
&
CB1L3PAROK
CB2L3PAROK
CB1LSPAROK
CB2LSPAROK
V03310
Seq Counter = 0
Seq Counter = 1
AR Enable CB1
1
Foll CB1
CB2L SPAROK
Fol SPAROK
Foll CB2
CB1L SPAROK
Foll 3PAROK
&
&
&
&
AR Enable CB2
&
&
CB1FSPAROK
CB2FSPAROK
CB1F3PAROK
CB2F3PAROK
1385
1609
1605
1497
1498
1497
1498
1409
1410
846
847
1530
1609
1431
1605
846
847
1609
1605
331
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