Schweitzer Engineering Laboratories SEL-421-4 - Table 11.16 Relay Word Bits: 52 Status and Open-Phase Detector

11.48
SEL-421 Relay Instruction Manual Date Code 20171021
Relay Word Bits
Row Lists
73 RTSC2 Circuit Breaker 2 current-supervised C-Phase retrip
73 RT2 Circuit Breaker 2 retrip
73 FBFA2 Circuit Breaker 2 A-Phase circuit breaker failure
73 FBFB2 Circuit Breaker 2 B-Phase circuit breaker failure
73 FBFC2 Circuit Breaker 2 C-Phase circuit breaker failure
73 FBF2 Circuit Breaker 2 circuit breaker failure
74 50R2 Circuit Breaker 2 residual current threshold exceeded
74 BFIN2 Circuit Breaker 2 no current circuit breaker failure initiation
74 NBF2 Circuit Breaker 2 no current circuit breaker failure
74 50LCA2 Circuit Breaker 2 A-Phase load current threshold exceeded
74 50LCB2 Circuit Breaker 2 B-Phase load current threshold exceeded
74 50LCC2 Circuit Breaker 2 C-Phase load current threshold exceeded
74 BFILC2 Circuit Breaker 2 load current circuit breaker failure initiation
74 LCBF2 Circuit Breaker 2 load current circuit breaker failure
75 50FOA2 Circuit Breaker 2 A-Phase flashover current threshold exceeded
75 50FOB2 Circuit Breaker 2 B-Phase flashover current threshold exceeded
75 50FOC2 Circuit Breaker 2 C-Phase flashover current threshold exceeded
75 BLKFOA2 Circuit Breaker 2 block A-Phase flashover detection
75 BLKFOB2 Circuit Breaker 2 block B-Phase flashover detection
75 BLKFOC2 Circuit Breaker 2 block C-Phase flashover detection
75 FOA2 Circuit Breaker 2 A-Phase flashover detected
75 FOB2 Circuit Breaker 2 B-Phase flashover detected
76 FOC2 Circuit Breaker 2 C-Phase flashover detected
76 FOBF2 Circuit Breaker 2 flashover detected
76 BFTRIP2 Circuit Breaker 2 failure trip output asserted
76 BFTR2 Circuit breaker failure trip, Circuit Breaker 2 (SEL
OGIC control equation)
76 BFULTR2 Circuit breaker failure unlatch trip, Circuit Breaker 2 (SEL
OGIC control equation)
76 * Reserved
76 * Reserved
Table 11.16 Relay Word Bits: 52 Status and Open-Phase Detector (Sheet 1 of 2)
Row Name Description
77 B1OPHA Circuit Breaker 1 A-Phase open
77 B1OPHB Circuit Breaker 1 B-Phase open
77 B1OPHC Circuit Breaker 1 C-Phase open
77 B2OPHA Circuit Breaker 2 A-Phase open
77 B2OPHB Circuit Breaker 2 B-Phase open
77 B2OPHC Circuit Breaker 2 C-Phase open
77 LOPHA Line A-Phase open
77 LOPHB Line B-Phase open
78 LOPHC Line C-Phase open
Table 11.15 Relay Word Bits: Breaker 2 Failure (Sheet 2 of 2)
Row Name Description