R.A.5
Date Code 20111215 Reference Manual SEL-421 Relay
Relay Word Bits
Alphabetic
67Q4T Level 4 negative-sequence delayed directional overcurrent
element
27
67QG2S Negative-sequence and residual directional overcurrent short
delay element
52
67QUBF Forward direction supervised output from 50QUBP 19
67QUBR Reverse direction supervised output from 50QUBP 19
79CY1 Relay in single-pole reclose cycle state 35
79CY3 Relay in three-pole reclose cycle state 35
79STRT Relay in start state 42
A3PT Assert three-pole trip 46
ACN01Q–
ACN32Q
Automation counter outputs 186–189
ACN01R–
ACN32R
Automation counter resets 190–193
AFRTEXA Automation SEL
OGIC control equation first execution after
Automation Settings change
196
AFRTEXP Automation SEL
OGIC control equation first execution after
Protection Settings Change, Group Switch, or Source Switch
Selection.
196
ALT01–
ALT32
Automation Latches 174–177
ALTI Alternate current source (SEL
OGIC control equation) 261
ALTS2 Alternate synchronism source for Circuit Breaker 2 261
ALTV Alternate voltage source (SEL
OGIC control equation) 261
ANOKA Analog transfer OK on M
IRRORED BITS
®
communications
Channel A
233
ANOKB Analog transfer OK on M
IRRORED BITS communications
Channel B
234
APS Trip logic A-phase selected 46
AST01Q–
AST32Q
Automation sequencing timer outputs 178–181
AST01R–
AST32R
Automation sequencing timer resets 182–185
ASV001–
ASV256
Automation SEL
OGIC control equation variable 142–173
ATPA Assert Trip A 46
ATPB Assert Trip B 46
ATPC Assert Trip C 46
AUNRLBL Automation SEL
OGIC control equation unresolved label 196
B1BCWAL Circuit Breaker 1 contact wear monitor alarm 79
B1BITAL Circuit Breaker 1 inactivity time alarm 80
B1ESOAL Circuit Breaker 1 electrical slow operation alarm 80
B1KAIAL Circuit Breaker 1 interrupted current alarm 80
B1MRTAL Circuit Breaker 1 motor running time alarm 80
B1MRTIN Motor run time contact input-Circuit Breaker 1 (SEL
OGIC
control equation)
79
Table A.1 Alphabetic List of Relay Word Bits (Sheet 5 of 21)
Name Description
Row
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