Schweitzer Engineering Laboratories SEL-300G - Page 79

Relay Element Settings 2-39
SEL-300G Instruction Manual Date Code 20020206
1%
0.01
0.1
1
10
100
10% 100% 1000% 10000%
I2 (percent of INOM)
1000
10000
46Q2K = 100
75
50
40
30
20
10
5
2
46Q2P
minimum = 2%
46Q2T Operating Time
(seconds)
DWG: M300G150
2
op
INOM
2I
K2Q46
t
÷
ø
ö
ç
è
æ
=
seconds
Figure 2.20: Negative-Sequence Time-Overcurrent Operating Characteristic