Schweitzer Engineering Laboratories SEL-251 - Page 96

4-4 Event Reporting Date Code 970103
SEL-251, -2, -3 Instruction Manual
Event
Report
Column Elements Symbol
P Phase overcurrent
51 51P 51T
0 0 .
0 1 1
1 0 p
1 1 T
50L 50L 50LT
0 0 .
0 1 (not possible)
1 0 p
1 1 T
50H 50H
0 .
1 p
TCI Internal torque control
50C 27
0 0 .
0 1 V
1 0 I
1 1 3
Q Negative-sequence overcurrent
51 51QP 51QT
0 0 .
0 1 1
1 0 p
1 1 T
50 50Q 50QT
0 0 .
0 1 (not possible)
1 0 p
1 1 T
N Ground\residual overcurrent
51 51NP 51NT
0 0 .
0 1 1
1 0 p
1 1 T
50L 50NL 50NLT
0 0 .
0 1 (not possible)
1 0 p
1 1 T
Event
Report
Column Elements Symbol
50H 50NH
0 .
1 p
I Demand current thresholds
DEM PDEM QDEM NDEM
0 0 0 .
0 0 1 N
0 1 0 Q
0 1 1 3
1 0 0 P
1 0 1 5
1 1 0 6
1 1 1 7
79 Reclosing relay states
79RS 79CY 79LO
0 0 0 . (no 52A or
!52A)
0 0 1 L
0 1 0 C
0 1 1 (not possible)
1 0 0 R
1 0 1 (not possible)
1 1 0 (not possible)
1 1 1 (not possible)
BKR Circuit breaker alarms
TF CF TCMA
0 0 0 .
0 0 1 M
0 1 0 C
0 1 1 3
1 0 0 T
1 0 1 5
1 1 0 6
1 1 1 7
Out Output contacts
T&C TRIP CLOSE
0 0 .
0 1 C
1 0 T
1 1 (not possible)
1&2 A1 A2
0 0 .
0 1 2
1 0 1
1 1 B (Both)