701 Motor Protection Relay Date Code 20010719
SEL
OGIC
®
Control Equations & Relay Logic
Relay Word Bits
B.4
Relay Word Bits
The protection and control element results are represented by Relay Word bits.
Each Relay Word bit has a label name and can be in either of the following states:
1 (logical 1) or 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.
The Relay Word bits are collected into a table of 11 rows, each row containing
8 bits. The collection is called the Relay Word. Tab le B.1 and Table B.2 show a
complete listing of Relay Word bits and their descriptions. The Relay Word bit row
numbers correspond to the row numbers used in the TAR command (see TARGET
(Level 1 or 2) on page 6.27 in Section 6: ASCII Serial Port Operation).
Table B.1 SEL- 701 Relay Word Bi ts
Table B.1 SEL-701 Relay Word Bits
Row
Relay Word Bits
1 STARTING RUNNING STOPPED JAMTRIP LOSSALRM LOSSTRIP 46UBA 46UBT
2 49A 49T THERMLO NOSLO TBSLO ABSLO * *
3 50P1T 50P2T 50N1T 50N2T 50QT 50S 50G1T 50G2T
4 47T TRGTR START 52A SPDSTR SPEEDSW RTDBIAS RTDFLT
5 WDGALRM WDGTRIP BRGALRM BRGTRIP AMBALRM AMBTRIP OTHALRM OTHTRIP
6 27P1 27P2 59P1 59P2 59G 81D1T 81D2T 81D3T
7 37PA 37PT 55A 55T VARA VART * *
8 LT1 LT2 LT3 LT4 RB1 RB2 RB3 RB4
9 SV1 SV2 SV3 SV4 SV1T SV2T SV3T SV4T
10 IN1 IN2 IN3 IN4 IN5 IN6 IN7 *
11 TRIP OUT1 OUT2 OUT3 ALARM * * *
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