Date Code 20080918 Instruction Manual SEL-749M Relay
Appendix G
Relay Word Bits
Instructi on Manual
Overview
The protection and control element results are represented by Relay Word bits
in the SEL-749M Relay. Each Relay Word bit has a label name and can be in
either of the following states:
➤ 1 (logical 1)
➤ 0 (logical 0)
Logical 1 represents an element being picked up or otherwise asserted.
Logical 0 represents an element being dropped out or otherwise deasserted.
Table G.1 and Table G.2 show a list of Relay Word bits and corresponding
descriptions. The Relay Word bit row numbers correspond to the row numbers
used in the TA R command (see TARGET Command (Display Relay Word Bit
Status) on page U.7.27).
Any Relay Word bit (except Row 0) can be used in SEL
OGIC
®
control
equations (see Section 4: Protection and Logic Functions) and the Sequential
Events Recorder (SER) trigger list settings (see Section 9: Analyzing Events).
Ta b l e G .1 S EL - 749 M Re l a y Wo r d B i ts (Sheet 1 of 2)
Bit/
Row
Relay Word Bits
7 6 5 4 3 2 1 0
TAR 0
ENABLE TRIP TLED_01 TLED_02 TLED_03 TLED_04 TLED_05 TLED_06
1
49T LOSSTRIP JAMTRIP 46UBT 50P1T RTDT PTCTRIP 50G1T
2
VART 37PT 27P1T 59P1T 47T 55T SPDSTR 50N1T
3
SMTRIP 81D1T 81D2T OTHTRIP AMBTRIP PTCFLT RTDFLT *
4
COMMIDLE COMMLOSS REMTRIP COMMFLT CFGFLT * * *
5
49A LOSSALRM JAMALRM 46UBA RTDA 55A 50N2T 50G2T
6
VARA 37PA 27P2T 59P2T SPDSAL 81D1A 81D2A OTHALRM
7
AMBALRM SALARM WA RN I N G LOADUP LOADLOW * 50S 50P2T
8
STOPPED RUNNING STARTING STAR DELTA START IRIGOK *
9
IN101 IN102 IN401 IN402 IN403 * RTDIN *
10
TRIP OUT101 OUT102 OUT103 OUT401 OUT402 OUT403 OUT404
11
50P1P 50P2P 50N1P 50N2P 50G1P 50G2P 27P1 59P1
12
WDGALRM WDGTRIP BRGALRM BRGTRIP THERMLO NOSLO TBSLO ABSLO
13
PROTBL THERBL TRGTR SPEEDSW RTDBIAS 52A SPEED2 HALARM
14
RTD1A RTD1T RTD2A RTD2T RTD3A RTD3T RTD4A RTD4T
Courtesy of NationalSwitchgear.com
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