Sel SEL-421 - Relay Word Bits: Reclosing Elements

R.A.29
Date Code 20111215 Reference Manual SEL-421 Relay
Relay Word Bits
Row List
31 * Reserved
32 59VS2 VS2 within “healthy voltage” window
32 25ENBK2 Circuit Breaker 2 synchronism-check element enable
32 SFZBK2 Circuit Breaker 2 slip frequency less than 5 mHz
32 SFBK2 5 mHz  Circuit Breaker 2 slip frequency < 25 SFBK2
32 25W1BK2 Circuit Breaker 2 Angle 1 within Window 1
32 25W2BK2 Circuit Breaker 2 Angle 2 within Window 2
32 25A1BK2 Circuit Breaker 2 voltages within Synchronism Angle 1
32 25A2BK2 Circuit Breaker 2 voltages within Synchronism Angle 2
33 FAST2 fs2 > fp
33 SLOW2 fs2 < fp
33 BSYNBK2 Block synchronism check for Circuit Breaker 2
33 * Reserved
33 * Reserved
33 * Reserved
33 * Reserved
33 * Reserved
Table A.9 Relay Word Bits: Reclosing Elements (Sheet 1 of 3)
Row Name Description
34 SPRI Single-pole reclose initiation (SELOGIC control equation)
34 SPARC Single-pole reclose initiate qualified
34 SPLSHT Single-pole reclose last shot
34 SPOBK1 Single-pole open Circuit Breaker 1
34 SPOBK2 Single-pole open Circuit Breaker 2
34 3PRI Three-pole reclose initiation (SEL
OGIC control equation)
34 3PARC Three-pole reclose initiate qualified
34 3POBK1 Three-pole open Circuit Breaker 1
35 3POBK2 Three-pole open Circuit Breaker 2
35 3POLINE Three-pole open line
35 3PLSHT Three-pole reclose last shot
35 BK1RS Circuit Breaker 1 in ready state
35 BK2RS Circuit Breaker 2 in ready state
35 79CY1 Relay in single-pole reclose cycle state
35 79CY3 Relay in three-pole reclose cycle state
35 BK1LO Circuit Breaker 1 in lockout state
36 BK2LO Circuit Breaker 2 in lockout state
36 BK1CL Circuit Breaker 1 close command
36 BK2CL Circuit Breaker 2 close command
36 LEADBK0 No lead circuit breaker
36 LEADBK1 Lead circuit breaker = Circuit Breaker 1
Table A.8 Relay Word Bits: Synchronism-Check Elements (Sheet 2 of 2)
Row Name Description