Schweitzer Engineering Laboratories SEL-421-4 - Table 11.15 Relay Word Bits: Breaker 2 Failure

11.47
Date Code 20171021 Instruction Manual SEL-421 Relay
Relay Word Bits
Row Lists
68 50LCA1 Circuit Breaker 1 A-Phase load current threshold exceeded
68 50LCB1 Circuit Breaker 1 B-Phase load current threshold exceeded
68 50LCC1 Circuit Breaker 1 C-Phase load current threshold exceeded
68 BFILC1 Circuit Breaker 1 load current circuit breaker failure initiation
68 LCBF1 Circuit Breaker 1 load current circuit breaker failure
69 50FOA1 Circuit Breaker 1 A-Phase flashover current threshold exceeded
69 50FOB1 Circuit Breaker 1 B-Phase flashover current threshold exceeded
69 50FOC1 Circuit Breaker 1 C-Phase flashover current threshold exceeded
69 BLKFOA1 Circuit Breaker 1 block A-Phase flashover detection
69 BLKFOB1 Circuit Breaker 1 block B-Phase flashover detection
69 BLKFOC1 Circuit Breaker 1 block C-Phase flashover detection
69 FOA1 Circuit Breaker 1 A-Phase flashover detected
69 FOB1 Circuit Breaker 1 B-Phase flashover detected
70 FOC1 Circuit Breaker 1 C-Phase flashover detected
70 FOBF1 Circuit Breaker 1 flashover detected
70 BFTRIP1 Circuit Breaker 1 failure trip output asserted
70 BFTR1 Circuit breaker failure trip, Circuit Breaker 1 (SEL
OGIC control equation)
70 BFULTR1 Circuit breaker failure unlatch trip, Circuit Breaker 1 (SEL
OGIC control equation)
70 * Reserved
70 * Reserved
Table 11.15 Relay Word Bits: Breaker 2 Failure (Sheet 1 of 2)
Row Name Description
71 BFI3P2 Circuit Breaker 2 three-pole circuit breaker failure initiation
71 BFIA2 Circuit Breaker 2 A-Phase circuit breaker failure initiation
71 BFIB2 Circuit Breaker 2 B-Phase circuit breaker failure initiation
71 BFIC2 Circuit Breaker 2 C-Phase circuit breaker failure initiation
71 BFI3PT2 Circuit Breaker 2 three-pole extended circuit breaker failure initiation
71 BFIAT2 Circuit Breaker 2 A-Phase extended circuit breaker failure initiation
71 BFIBT2 Circuit Breaker 2 B-Phase extended circuit breaker failure initiation
71 BFICT2 Circuit Breaker 2 C-Phase extended circuit breaker failure initiation
72 50FA2 Circuit Breaker 2 A-Phase current threshold exceeded
72 50FB2 Circuit Breaker 2 B-Phase current threshold exceeded
72 50FC2 Circuit Breaker 2 C-Phase current threshold exceeded
72 RT3P2 Circuit Breaker 2 three-pole retrip
72 RTA2 Circuit Breaker 2 A-Phase retrip
72 RTB2 Circuit Breaker 2 B-Phase retrip
72 RTC2 Circuit Breaker 2 C-Phase retrip
72 RTS3P2 Circuit Breaker 2 current-supervised three-pole retrip
73 RTSA2 Circuit Breaker 2 current-supervised A-Phase retrip
73 RTSB2 Circuit Breaker 2 current-supervised B-Phase retrip
Table 11.14 Relay Word Bits: Breaker 1 Failure (Sheet 2 of 2)
Row Name Description