Sel SEL-421 - Relay Word Bits: Circuit Breaker Status and Open Phase

R.A.37
Date Code 20111215 Reference Manual SEL-421 Relay
Relay Word Bits
Row List
67 50FOC2 Circuit Breaker 2 C-phase flashover current threshold
exceeded
67 BLKFOA2 Circuit Breaker 2 block A-phase flashover detection
67 BLKFOB2 Circuit Breaker 2 block B-phase flashover detection
67 BLKFOC2 Circuit Breaker 2 block C-phase flashover detection
67 FOA2 Circuit Breaker 2 A-phase flashover detected
67 FOB2 Circuit Breaker 2 B-phase flashover detected
68 FOC2 Circuit Breaker 2 C-phase flashover detected
68 FOBF2 Circuit Breaker 2 flashover detected
68 BFTRIP2 Circuit Breaker 2 failure trip output asserted
68 BFTR2 Circuit breaker failure trip—Circuit Breaker 2
(SEL
OGIC control equation)
68 BFULTR2 Circuit breaker failure unlatch trip—Circuit Breaker 2
(SEL
OGIC control equation)
68 * Reserved
68 * Reserved
68 * Reserved
Table A.15 Relay Word Bits: Circuit Breaker Status and Open Phase
Detector (Sheet 1 of 2)
Row Name Description
69 B1OPHA Circuit Breaker 1 A-phase open
69 B1OPHB Circuit Breaker 1 B-phase open
69 B1OPHC Circuit Breaker 1 C-phase open
69 B2OPHA Circuit Breaker 2 A-phase open
69 B2OPHB Circuit Breaker 2 B-phase open
69 B2OPHC Circuit Breaker 2 C-phase open
69 LOPHA Line A-phase open
69 LOPHB Line B-phase open
70 LOPHC Line C-phase open
70 SPOA A-phase open
70 SPOB B-phase open
70 SPOC C-phase open
70 SPO One or two poles open
70 3PO All three poles open
70 27APO A-phase undervoltage, pole open
70 27BPO B-phase undervoltage, pole open
71 27CPO C-phase undervoltage, pole open
71 * Reserved
71 * Reserved
71 * Reserved
71 * Reserved
Table A.14 Relay Word Bits: Circuit Breaker 2 Failure Elements
(Sheet 2 of 2)
Row Name Description