J.13
Date Code 20100129
Instruction Manual
SEL-751A Relay
Relay Word Bits
Definitions
T04_LED
Asserts when the SEL
OGIC
control equation T04_LED result is logical 1 (see
).
34
T05_LED
Asserts when the SEL
OGIC
control equation T05_LED result is logical 1 (see
).
34
T06_LED
Asserts when the SEL
OGIC
control equation T06_LED result is logical 1 (see
).
34
TLED_01
Front-Panel T01_LED.
0
TLED_02
Front-Panel T02_LED.
0
TLED_03
Front-Panel T03_LED.
0
TLED_04
Front-Panel T04_LED.
0
TLED_05
Front-Panel T05_LED.
0
TLED_06
Front-Panel T06_LED.
0
TMB1A to TMB8A
Channel A transmit M
IRRORED
B
ITS
TMB1A through TMB8A.
89
TMB1B to TMB8B
Channel B transmit M
IRRORED
B
ITS
TMB1B through TMB8B.
91
TOL1
Arc-Flash light input 1 element pickup.
116
TOL2
Arc-Flash light input 2 element pickup.
116
TOL3
Arc-Flash light input 3 element pickup.
116
TOL4
Arc-Flash light input 4 element pickup.
116
TQUAL1
Time Quality Bit, add 1 when asserted (synchrophasors).
112
TQUAL2
Time Quality Bit, add 2 when asserted (synchrophasors).
112
TQUAL4
Time Quality Bit, add 4 when asserted (synchrophasors).
112
TQUAL8
Time Quality Bit, add 8 when asserted (synchrophasors).
112
TR
Trip SEL
OGIC
control equation (see
29
TREA1
Trigger Reason for Bit 1 for Synchrophasors (see
31
TREA2
Trigger Reason for Bit 2 for Synchrophasors (see
31
TREA3
Trigger Reason for Bit 3 for Synchrophasors (see
31
TREA4
Trigger Reason for Bit 4 for Synchrophasors (see
31
TRGTR
Target Reset. Asserts for one quarter-cycle when you execute a front-panel, serial port target reset
command, or Modbus target reset.
22
TRIP
Output of Trip Logic (see
).
15
TRIP_LED
Front-Panel TRIP LED.
0
TSOK
Assert if current time source accuracy is sufficient for synchronized phasor measurements. (Refer
to
.)
13
TUTCS
Offset hours sign from UTC time, subtract the UTC offset if TUTCS is asserted; otherwise, add.
(Synchrophasors)
113
TUTC1
Offset hours from UTC time, binary, add 1 if asserted
113
TUTC2
Offset hours from UTC time, binary, add 2 if asserted
113
TUTC4
Offset hours from UTC time, binary, add 4 if asserted
113
TUTC8
Offset hours from UTC time, binary, add 8 if asserted
113
TUTCH
Offset half-hour from UTC time, binary, add 0.5 if asserted
113
ULCL
Unlatch close conditions SEL
OGIC
equation state (see
).
34
ULTRIP
Unlatch (auto reset) trip from SEL
OGIC
29
VB
xxx
Virtual bits used for incoming GOOSE messages (
xxx
= 001 to 128) (see Virtual Bits description
93–108
Table J.2
Relay Word Bit Definitions for the SEL-751A
(Sheet 10 of 11)
Bit
Definition
Row
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