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B.1 IEC/BS142 CURVES
Trip times for IEC/BS142 curves are as follows:
Table B–2: TRIP TIMES (IN SECONDS) FOR IEC/BS142 CURVES
TIMES
DIAL
THE
0.05
0.10
TAP
INVERSE BS 142
B
7.17
14.34 28.68
1.05
0.86
1.72
1.50
0.50
1.00
2.00
0.32
0.63
3.00
0.25
0.50
4.00
0.21
0.43
5.00
0.19
0.38
6.00
0.18
0.35
7.00
0.16
0.33
8.00
0.16
0.31
9.00
10.00 0.15
0.30
VERY INVERSE BS 142
13.50 27.00 54.00
1.05
1.35
2.70
1.50
0.68
1.35
2.00
0.34
0.68
3.00
0.23
0.45
4.00
0.17
0.34
5.00
0.14
0.27
6.00
0.11
0.23
7.00
0.10
0.19
8.00
0.08
0.17
9.00
10.00 0.08
0.15
EXTREMELY INVERSE BS 142
39.02 78.05 156.10 234.15 312.20 390.24 468.29 546.34 624.39 702.44 780.49 936.59 1092.7 1248.8 1404.9 1561.0
1.05
3.20
6.40
1.50
1.33
2.67
2.00
0.50
1.00
3.00
0.27
0.53
4.00
0.17
0.33
5.00
0.11
0.23
6.00
0.08
0.17
7.00
0.06
0.13
8.00
0.05
0.10
9.00
10.00 0.04
0.08
B-2
0.20
0.30
0.40
0.50
43.02
57.36
71.70
3.44
5.16
6.88
8.60
2.01
3.01
4.01
5.01
1.26
1.89
2.52
3.15
1.00
1.49
1.99
2.49
0.86
1.28
1.71
2.14
0.77
1.15
1.53
1.92
0.71
1.06
1.41
1.76
0.66
0.99
1.32
1.65
0.62
0.93
1.25
1.56
0.59
0.89
1.19
1.49
81.00
108.00 135.00 162.00 189.00 216.00 243.00 270.00 324.00 378.00 432.00 486.00 540.00
5.40
8.10
10.80
13.50
2.70
4.05
5.40
6.75
1.35
2.03
2.70
3.38
0.90
1.35
1.80
2.25
0.68
1.01
1.35
1.69
0.54
0.81
1.08
1.35
0.45
0.68
0.90
1.13
0.39
0.58
0.77
0.96
0.34
0.51
0.68
0.84
0.30
0.45
0.60
0.75
12.80
19.20
25.60
32.00
5.33
8.00
10.67
13.33
2.00
3.00
4.00
5.00
1.07
1.60
2.13
2.67
0.67
1.00
1.33
1.67
0.46
0.69
0.91
1.14
0.33
0.50
0.67
0.83
0.25
0.38
0.51
0.63
0.20
0.30
0.40
0.50
0.16
0.24
0.32
0.40
MIFII Digital Feeder Relay
0.60
0.70
0.80
0.90
86.04
100.38 114.72 129.06 143.40 172.08 200.76 229.44 258.12 286.80
10.32
12.04
13.76
15.47
6.02
7.02
8.02
9.03
3.78
4.41
5.04
5.67
2.99
3.49
3.98
4.48
2.57
3.00
3.42
3.85
2.30
2.69
3.07
3.45
2.12
2.47
2.82
3.17
1.98
2.31
2.64
2.97
1.87
2.18
2.49
2.80
1.78
2.08
2.38
2.67
16.20
18.90
21.60
24.30
8.10
9.45
10.80
12.15
4.05
4.73
5.40
6.08
2.70
3.15
3.60
4.05
2.03
2.36
2.70
3.04
1.62
1.89
2.16
2.43
1.35
1.58
1.80
2.03
1.16
1.35
1.54
1.74
1.01
1.18
1.35
1.52
0.90
1.05
1.20
1.35
38.40
44.80
51.20
57.60
16.00
18.67
21.33
24.00
6.00
7.00
8.00
9.00
3.20
3.73
4.27
4.80
2.00
2.33
2.67
3.00
1.37
1.60
1.83
2.06
1.00
1.17
1.33
1.50
0.76
0.89
1.02
1.14
0.60
0.70
0.80
0.90
0.48
0.57
0.65
0.73
APPENDIX B
1.00
1.20
1.40
1.60
17.19
20.63
24.07
27.51
10.03
12.03
14.04
16.05
6.30
7.56
8.82
10.08
4.98
5.98
6.97
7.97
4.28
5.14
5.99
6.85
3.84
4.60
5.37
6.14
3.53
4.23
4.94
5.64
3.30
3.96
4.62
5.27
3.12
3.74
4.36
4.99
2.97
3.56
4.16
4.75
27.00
32.40
37.80
43.20
13.50
16.20
18.90
21.60
6.75
8.10
9.45
10.80
4.50
5.40
6.30
7.20
3.38
4.05
4.73
5.40
2.70
3.24
3.78
4.32
2.25
2.70
3.15
3.60
1.93
2.31
2.70
3.09
1.69
2.03
2.36
2.70
1.50
1.80
2.10
2.40
64.00
76.80
89.60
102.40 115.20 128.00
26.67
32.00
37.33
42.67
10.00
12.00
14.00
16.00
5.33
6.40
7.47
8.53
3.33
4.00
4.67
5.33
2.29
2.74
3.20
3.66
1.67
2.00
2.33
2.67
1.27
1.52
1.78
2.03
1.00
1.20
1.40
1.60
0.81
0.97
1.13
1.29
1.80
2.00
30.95
34.39
18.05
20.06
11.34
12.60
8.96
9.96
7.70
8.56
6.91
7.67
6.35
7.06
5.93
6.59
5.61
6.23
5.35
5.94
48.60
54.00
24.30
27.00
12.15
13.50
8.10
9.00
6.08
6.75
4.86
5.40
4.05
4.50
3.47
3.86
3.04
3.38
2.70
3.00
48.00
53.33
18.00
20.00
9.60
10.67
6.00
6.67
4.11
4.57
3.00
3.33
2.29
2.54
1.80
2.00
1.45
1.62
GEK-106237P
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