Schweitzer Engineering Laboratories SEL-351 - Page 477

Date Code 20001006 Standard Event Reports, Sag/Swell/Interruption Report, and SER
SEL-351 Instruction Manual
12-11
Column Heading
Corresponding
Elements (Relay
Word Bits) Symbol Definition
51 A
51 B
51A, 51AT, 51AR
51B, 51BT, 51BR
.
Time-overcurrent element reset (51_R).
51 C
51 P
51C, 51CT, 51CR
51P, 51PT, 51PR
p Time-overcurrent element picked up and
timing (51_).
51 N
51 G
51N, 51N, 51NR
51G, 51GT, 51GR
T Time-overcurrent element timed out
(51_T).
51 Q 51Q, 51QT, 51QR r Time-overcurrent element timing to
reset.
1 Time-overcurrent element timing to reset
after having timed out (when element
reset is set for 1 cycle, not
electromechanical reset).
50 P 50A, 50B, 50C A Single-phase instantaneous overcurrent
element 50A picked up.
B Single-phase instantaneous overcurrent
element 50B picked up.
C Single-phase instantaneous overcurrent
element 50C picked up.
a Both 50A and 50B picked up.
b Both 50B and 50C picked up.
c Both 50C and 50A picked up.
3 50A, 50B, and 50C picked up.
50 PP 50AB1, 50AB2,
50AB3, 50AB4,
50BC1, 50BC2,
A Phase-to-phase instantaneous
overcurrent element 50AB1, 50AB2,
50AB3, or 50AB4 picked up.
50BC3, 50BC4,
50CA1, 50CA2,
50CA3, 50CA4
B Phase-to-phase instantaneous
overcurrent element 50BC1, 50BC2,
50BC3, or 50BC4 picked up.
C Phase-to-phase instantaneous
overcurrent element 50CA1, 50CA2,
50CA3, or 50CA4 picked up.
a 50AB_ and 50CA_ picked up.
b 50AB_ and 50BC_ picked up.
c 50BC_ and 50CA_ picked up.
3 50AB_, 50BC_, and 50CA_ picked up.
32 PQ F32P P Forward phase directional element F32P
picked up.
R32P p Reverse phase directional element R32P
picked up.
F32Q Q Forward negative-sequence directional
element F32Q picked up.
R32Q q Reverse negative-sequence directional
element R32Q picked up.
Courtesy of NationalSwitchgear.com