Sel SEL-421 - Relay Word Bits: Circuit Breaker Monitor

R.A.38
SEL-421 Relay Reference Manual Date Code 20111215
Relay Word Bits
Row List
71 * Reserved
71 * Reserved
71 * Reserved
72 52ACL1 Circuit Breaker 1, Pole A closed
72 52BCL1 Circuit Breaker 1, Pole B closed
72 52CCL1 Circuit Breaker 1, Pole C closed
72 52AAL1 Circuit Breaker 1, Pole A alarm
72 52BAL1 Circuit Breaker 1, Pole B alarm
72 52CAL1 Circuit Breaker 1, Pole C alarm
72 52AA1 Circuit Breaker 1, Pole A status
72 52AB1 Circuit Breaker 1, Pole B status
73 52AC1 Circuit Breaker 1, Pole C status
73 * Reserved
73 52ACL2 Circuit Breaker 2, Pole A closed
73 52BCL2 Circuit Breaker 2, Pole B closed
73 52CCL2 Circuit Breaker 2, Pole C closed
73 52AAL2 Circuit Breaker 2, Pole A alarm
73 52BAL2 Circuit Breaker 2, Pole B alarm
73 52CAL2 Circuit Breaker 2, Pole C alarm
74 52AA2 Circuit Breaker 2, Pole A status
74 52AB2 Circuit Breaker 2, Pole B status
74 52AC2 Circuit Breaker 2, Pole C status
74 * Reserved
74 * Reserved
74 * Reserved
74 * Reserved
74 * Reserved
75–78 * Reserved
Table A.16 Relay Word Bits: Circuit Breaker Monitor (Sheet 1 of 2)
Row Name Description
79 BM1TRPA Circuit breaker monitor A-phase trip—Circuit Breaker 1
(SEL
OGIC control equation)
79 BM1TRPB Circuit breaker monitor B-phase trip—Circuit Breaker 1
(SEL
OGIC control equation)
79 BM1TRPC Circuit breaker monitor C-phase trip—Circuit Breaker 1
(SEL
OGIC control equation)
79 BM1CLSA Circuit breaker monitor A-phase close—Circuit Breaker 1
(SEL
OGIC control equation)
79 BM1CLSB Circuit breaker monitor B-phase close—Circuit Breaker 1
(SEL
OGIC control equation)
Table A.15 Relay Word Bits: Circuit Breaker Status and Open Phase
Detector (Sheet 2 of 2)
Row Name Description