Schweitzer Engineering Laboratories SEL-751 - Page 891

K.21
Date Code 20170927 Instruction Manual SEL-751 Relay
Relay Word Bits
Definitions
SV17T–SV24T SELOGIC control equation variable SV17T through SV24T with settable pickup and dropout
time delay
52
SV25–SV32 SEL
OGIC control equation variables SV25 through SV32
53
SV25T–SV32T SEL
OGIC control equation variable SV25T through SV32T with settable pickup and dropout
time delay
54
T01_LED–T06_LED SEL
OGIC control equation: drives T01_LED–T06_LED
38
TESTDB Command TESTDB (asserts when analog and digital values reported via Modbus, IEC 61850,
or Fast Meter protocol may be overridden)
145
THAMBH Ambient temperature measurement health
148
THOVL1 Thermal Element 1 operating current overload
147
THOVL2 Thermal Element 2 operating current overload
147
THOVL3 Thermal Element 3 operating current overload
148
THRLA1 Thermal Element 1 alarm
147
THRLA2 Thermal Element 2 alarm
147
THRLA3 Thermal Element 3 alarm
147
THRLT1 Thermal Element 1 trip
147
THRLT2 Thermal Element 2 trip
147
THRLT3 Thermal Element 3 trip
147
THST1 Thermal Element 1 time constant state switch
148
THST2 Thermal Element 2 time constant state switch
148
THST3 Thermal Element 3 time constant state switch
148
TLED_01–TLED_06 Target LED 1–Target LED 6
0
TMB1A–TMB8A Channel A transmit M
IRRORED BITS TMB1A through TMB8A
93
TMB1B–TMB8B Channel B transmit M
IRRORED BITS TMB1B through TMB8B
95
TOL1–TOL4 Arc-flash light input 1–4 element pickups
120
TOL5–TOL8 Arc-flash light input 5–8 element pickups
146
TQUAL1 Time quality bit, add 1 when asserted
116
TQUAL2 Time quality bit, add 2 when asserted
116
TQUAL4 Time quality bit, add 4 when asserted
116
TQUAL8 Time quality bit, add 8 when asserted
116
TR Trip SEL
OGIC control equation (also has been referred to as TRIPEQ)
33
TREA1–TREA4 Trigger reason bits 1–4 for synchrophasors
35
TRGTR Target reset. Asserts for one quarter-cycle when you execute a front-panel, serial port target
reset command, or Modbus target reset.
26
TRIP Breaker trip
21
TRIP_LED TRIP LED
0
TSNTPB SNTP secondary server is active
129
Table K.2 Relay Word Bit Definitions for the SEL-751 Relay (Sheet 16 of 17)
Bit Definition Row