Schweitzer Engineering Laboratories SEL-352-1 - Page 408

F-4 Relay Word Date Code 20010731
SEL-352-1, -2 Instruction Manual
Elements
Alphabetically
Description Relay Word
Row
37OP
37OPA
37OPB
37OPC
OverPower elements for A-, B-, or C-phase, and a general
element for assertion of any phase
4
9
9
9
46A
46B
46C
46P
Current unbalance elements for A-, B-, or C-phase and a
general element for assertion of any phase
8
8
8
4
47Q Negative-sequence overvoltage element, Asserts when
either X47Q or Y47Q asserts (operates on V
2
)
4
50FT
50FTA
50FTB
50FTC
Overcurrent element for Fault conditions for A-, B-, or C-
phase and a general element for assertion of any phase.
50FT=50FTA+50FTB+50FTC
8
2
2
2
50LD
50LDA
50LDB
50LDC
Overcurrent element for Load or Line charging current
conditions for A-, B-, or C-phase and a general element
for assertion of any phase.
8
2
2
2
50MD
50MDA
50MDB
50MDC
Overcurrent element for Motor operated disconnect
conditions for A-, B-, or C-phase and a general element
for assertion of any phase.
8
3
3
3
50MNA
50MNB
50MNC
Minimum current detector (1 A secondary) for A-, B-, or C-
phase
7
7
7
50N Ground overcurrent element (operates on 3I
0
) 3
50R
50RA
50RB
50RC
50RA +50RB +50RC
Phase-A RMS overcurrent elements
Phase-B RMS overcurrent elements
Phase-C RMS overcurrent elements
16
16
16
16
52A
Breaker status target LED. View this bit with the TAR
command, but it cannot be used in logic.
0
52AA
52AB
52AC
Breaker status auxiliary input function for A-, B-, or C-
phase
23
23
23
52ACV 52A Contradicts Voltage alarm 53
86BFT
86RS
Lockout relay Breaker Failure Trip and Reset logic outputs 71
71