R.A.8
SEL-421 Relay Reference Manual Date Code 20111215
Relay Word Bits
Alphabetic
BM1CLSC Circuit breaker monitor C-phase close-Circuit Breaker 1
(SEL
OGIC control equation)
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
BM2CLSA Circuit breaker monitor A-phase close-Circuit Breaker 2
(SEL
OGIC control equation)
81
BM2CLSB Circuit breaker monitor B-phase close-Circuit Breaker 2
(SEL
OGIC control equation)
81
BM2CLSC Circuit breaker monitor C-phase close-Circuit Breaker 2
(SEL
OGIC control equation)
81
BM2TRPA Circuit breaker monitor A-phase trip-Circuit Breaker 2
(SEL
OGIC control equation)
81
BM2TRPB Circuit breaker monitor B-phase trip-Circuit Breaker 2
(SEL
OGIC control equation)
81
BM2TRPC Circuit breaker monitor C-phase trip-Circuit Breaker 2
(SEL
OGIC control equation)
81
BPS Trip logic B-phase selected 46
BSYNBK1 Block synchronism check for Circuit Breaker 1 31
BSYNBK2 Block synchronism check for Circuit Breaker 2 33
BTX Block extension picked up 52
CBADA Unavailability threshold exceeded for M
IRRORED BITS
communications Channel A
233
CBADB Unavailability threshold exceeded for M
IRRORED BITS
communications Channel B
234
CC1 Circuit Breaker 1 close command 87
CC2 Circuit Breaker 2 close command 87
CCALARM Communications card status alarm 194
CCIN001–
CCIN128
Communications card input points 236–251
CCOK Indicates connected Ethernet card is operating correctly 198
CCOUT01–
CCOUT32
Communications card output points 252–255
CCSTA01–
CCSTA16
Communications card status word 252–253
CCSTA17–
CCSTA32
Communications card self-test status word 258–259
CHSG Settings Group Change 96
COMPRM Communications-assisted trip permission 45
CPS Trip logic C-phase selected 46
CVTBL CCVT transient blocking logic active 15
CVTBLH
a
CCVT transient blocking logic active-high-speed elements 15
DC1F DC Monitor 1 fail alarm 85
Table A.1 Alphabetic List of Relay Word Bits (Sheet 8 of 21)
Name Description
Row
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