Sel 551 - Table 7.3 Other Standard Event Report Columns

7.6
SEL-551 Relay Instruction Manual Date Code 20110408
Standard Event Reports and SER
Standard 15-Cycle Event Reports
Table 7.3 Other Standard Event Report Columns (Sheet 1 of 3)
Column Heading
Corresponding Elements
(Relay Word Bits)
Symbol Definition
All columns . Element/input/output not picked up or not asserted, unless
otherwise stated.
51 P1
51P1, 51P1T, 51P1R . Time-overcurrent element reset (51_1R, 51_2R).
51 P2
51P2, 51P2T, 51P2R
51 N1
51N1, 51N1T, 51N1R p Time-overcurrent element picked up and timing (51_1,
51_2).
51 G1
51G1, 51G1T, 51G1R
51 Q2
51Q1, 51Q1T, 51Q1R T Time-overcurrent element timed out (51_1T, 51_2T).
51 Q2
51Q2, 51Q2T, 51Q2R
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 electrome-
chanical reset).
50 P12
50P1, 50P2 1 Phase instantaneous overcurrent element 50P1 picked up.
2 Phase instantaneous overcurrent element 50P2 picked up.
b Both 50P1 and 50P2 picked up.
50 P34
50P3, 50P4 3 Phase instantaneous overcurrent element 50P3 picked up.
4 Phase instantaneous overcurrent element 50P4 picked up.
b Both 50P3 and 50P4 picked up.
50 P56
50P5, 50P6 5 Phase instantaneous overcurrent element 50P5 picked up.
6 Phase instantaneous overcurrent element 50P6 picked up.
b Both 50P5 and 50P6 picked up.
50 ABC
50A, 50B, 50C 3 Single-phase instantaneous overcurrent elements 50A, 50B,
and 50C picked up.
a Only 50A and 50B picked up.
b Only 50B and 50C picked up.
c Only 50C and 50A picked up.
A Only 50A picked up.
B Only 50B picked up.
C Only 50C picked up.
50 N12
50N1, 50N2 1 Neutral ground instantaneous overcurrent element 50N1
picked up.
2 Neutral ground instantaneous overcurrent element 50N2
picked up.
b Both 50N1 and 50N2 picked up.
50 G12
50G1, 50G2 1 Residual ground instantaneous overcurrent element 50G1
picked up.
2 Residual ground instantaneous overcurrent element 50G2
picked up.
b Both 50G1 and 50G2 picked up.
50 Q12
50Q1, 50Q2 1 Negative-sequence instantaneous overcurrent element 50Q1
picked up.
2 Negative-sequence instantaneous overcurrent element 50Q2
picked up.
b Both 50Q1 and picked up.