Schweitzer Engineering Laboratories SEL-421-4 - Table 11.10 Relay Word Bits: Miscellaneous Elements; Table 11.11 Relay Word Bits: Trip Logic Elements

11.43
Date Code 20171021 Instruction Manual SEL-421 Relay
Relay Word Bits
Row Lists
49 SPSHOT0 Single-pole shot counter = 0
49 SPSHOT1 Single-pole shot counter = 1
49 SPSHOT2 Single-pole shot counter = 2
49 3PSHOT0 Three-pole shot counter = 0
49 3PSHOT1 Three-pole shot counter = 1
49 3PSHOT2 Three-pole shot counter = 2
49 3PSHOT3 Three-pole shot counter = 3
49 3PSHOT4 Three-pole shot counter = 4
50 SPOI Single-pole open interval timing
50 3POI Three-pole open interval timing
50 79STRT Relay in start state
50 TBBK Time between circuit breakers timing
50 BK1EXT Circuit Breaker 1 closed externally
50 BK2EXT Circuit Breaker 2 closed externally
50 SPOISC Single-pole open interval supervision condition
50 3POISC Three-pole open interval supervision condition
Table 11.10 Relay Word Bits: Miscellaneous Elements
Row Name Description
51 SOTFE Switch-onto-fault enable
51 ILOP Internal loss-of-potential from ELOP setting
51 LOP Loss-of-potential detected
51 ZLOAD ZLOUT or ZLIN element picked up
51 ZLIN Load-encroachment “load in” element
51 ZLOUT Load-encroachment “load out” element
51 FIDEN Fault identification logic enabled
51 FSA A-Phase sector fault (AG or BCG fault)
52 FSB B-Phase sector fault (BG or CAG fault)
52 FSC C-Phase sector fault (CG or ABG fault)
52 DFAULT Disables maximum/minimum metering and demand metering when SEL
OGIC control equa-
tion FAULT asserts
52 ER Event report trigger equation (SEL
OGIC control equation)
52 EAFSRC Alternate frequency source (SEL
OGIC control equation)
52 * Reserved
52 * Reserved
52 * Reserved
Table 11.11 Relay Word Bits: Trip Logic Elements (Sheet 1 of 2)
Row Name Description
53 RXPRM Receiver trip permission
53 COMPRM Communications-assisted trip permission
Table 11.9 Relay Word Bits: Reclosing Elements (Sheet 3 of 3)
Row Name Description