Date Code 20081022
Instruction Manual
SEL-787 Relay
Appendix J
Relay Word Bits
Instructi on Manual
Overview
The protection and control element results are represented by Relay Word bits
in the SEL-787 Transformer Protection 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.
and
show a list of Relay Word bits and corresponding
descriptions. The Relay Word bit row numbers correspond to the row numbers
used in the
TAR
command (see
TARGET Command (Display Relay Word Bit
).
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
).
Table J.1
SEL-787 Relay Word Bits
(Sheet 1 of 4)
Bit/
Row
Relay Word Bits
7
6
5
4
3
2
1
0
TAR 0
ENABLED
TRIP_LED
TLED_01
TLED_02
TLED_03
TLED_04 TLED_05
TLED_06
1
50P11T
50P12T
50P13T
50P14T
50P21T
50P22T
50P23T
50P24T
2
50G11T
50G12T
50Q11T
50Q12T
50G21T
50G22T
50Q21T
50Q22T
3
50N11T
50N12T
50NREF1
REF1E
50GREF1
REF1F
REF1R
REF1P
4
51P1T
51P2T
51G1T
51G2T
51Q1T
51Q2T
51N1T
a
5
87U1
87U2
87U3
87U
87R1
87R2
87R3
87R
6
TH5T 87AT 27P1T
27P2T
59P1T
59P2T
3PWR1T
3PWR2T
7
81D1T
81D2T
81D3T
81D4T
BFT1
BFT2
59Q1T
59Q2T
8
24D1
24D1T
24C2
24C2T
24CR
RTDT
9
REMTRIP
ORED50T
ORED51T
10
50P11P
50P12P
50P13P
50P14P
50P21P
50P22P
50P23P
50P24P
11
50G11P
50G12P
50Q11P
50Q12P
50G21P
50G22P
50Q21P
50Q22P
12
50N11P
50N12P
52A1
52A2
13
51P1P
51P2P
51G1P
51G2P
51Q1P
51Q2P
51N1P
14
51P1R
51P2R
51G1R
51G2R
51Q1R
51Q2R
51N1R
Summary of Contents for SEL-787
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