ETAP software calculation example for Arch flash analysis
Comments
Content
ETAP
Page:
1
Date:
09-30-2014
Contract:
SN:
85OTI30125
Engineer:
Revision: Base
Project:
5.0.3Z
Location:
Filename:
Study Case: SC
attl
Config.:
Normal
Arc-Flash Look-Up Table IEEE 1584 Standard
Incident Energy Exposure (Calorie/cm²)
Arc in Open Air
Bus
ID
Bus1
Bus2
Arc Duration
Flash Protection
Boundary (ft)
18
30
36
48
2.90
1.86
1.29
0.72
5.80
3.71
2.58
1.45
41.24
23.20
14.85
10.31
5.80
10.8
61.86
34.80
22.27
15.46
8.70
12.5
82.48
46.39
29.69
20.62
11.60
5.00
13.9
103.10
57.99
37.12
25.77
14.50
6.00
15.3
123.72
69.59
44.54
30.93
17.40
0.133
8.00
17.6
164.96
92.79
59.39
41.24
23.20
0.167
10.00
19.7
206.20
115.99
74.23
51.55
29.00
0.333
20.00
27.9
412.40
231.97
148.46
103.10
57.99
0.500
30.00
34.1
618.60
347.96
222.69
154.65
86.99
0.667
40.00
39.4
824.79
463.95
296.93
206.20
115.99
0.833
50.00
44.0
1030.99
579.93
371.16
257.75
144.98
1.000
60.00
48.3
1237.19
695.92
445.39
309.30
173.98
1.167
70.00
52.1
1443.39
811.91
519.62
360.85
202.98
1.333
80.00
55.7
1649.59
927.89
593.85
412.40
231.97
1.500
90.00
59.1
1855.79
1043.88
668.08
463.95
260.97
1.667
100.00
62.3
2061.98
1159.87
742.31
515.50
289.97
1.833
110.00
65.3
2268.18
1275.85
816.55
567.05
318.96
2.000
120.00
68.2
2474.38
1391.84
890.78
618.60
347.96
0.004
0.25
3.3
5.94
3.34
2.14
1.49
0.84
kV
Isc (kA)
Grounding
Seconds
34.500
14.636
Grounded
0.004
0.25
3.1
5.15
0.008
0.50
4.4
10.31
0.033
2.00
8.8
0.050
3.00
0.067
4.00
0.083
0.100
34.500
16.866
Grounded
Arc in Cubic Box
Distance from Arc Electrodes (inches)
Cycles
24
Flash Protection
Boundary (ft)
Distance from Arc Electrodes (inches)
18
24
30
36
48
ETAP
Page:
2
Date:
09-30-2014
Contract:
SN:
85OTI30125
Engineer:
Revision: Base
Project:
5.0.3Z
Location:
Filename:
Study Case: SC
attl
Config.:
Normal
Incident Energy Exposure (Calorie/cm²)
Arc in Open Air
Bus
ID
Bus2
Bus6
Arc Duration
Flash Protection
Boundary (ft)
18
24
36
48
4.28
2.97
1.67
17.11
11.88
6.68
25.66
17.82
10.02
53.46
34.22
23.76
13.37
66.83
42.77
29.70
16.71
142.57
80.20
51.33
35.64
20.05
190.09
106.93
68.43
47.52
26.73
21.1
237.62
133.66
85.54
59.40
33.41
29.9
475.23
267.32
171.08
118.81
66.83
30.00
36.6
712.85
400.98
256.63
178.21
100.24
0.667
40.00
42.3
950.47
534.64
342.17
237.62
133.66
0.833
50.00
47.3
1188.09
668.30
427.71
297.02
167.07
1.000
60.00
51.8
1425.70
801.96
513.25
356.43
200.49
1.167
70.00
55.9
1663.32
935.62
598.80
415.83
233.90
1.333
80.00
59.8
1900.94
1069.28
684.34
475.23
267.32
1.500
90.00
63.4
2138.56
1202.94
769.88
534.64
300.73
1.667
100.00
66.9
2376.17
1336.60
855.42
594.04
334.15
1.833
110.00
70.1
2613.79
1470.26
940.96
653.45
367.56
2.000
120.00
73.3
2851.41
1603.92 1026.51
712.85
400.98
0.004
0.25
3.1
5.15
1.29
0.72
0.008
0.50
4.4
10.31
5.80
3.71
2.58
1.45
0.033
2.00
8.8
41.24
23.20
14.85
10.31
5.80
0.050
3.00
10.8
61.86
34.80
22.27
15.46
8.70
0.067
4.00
12.5
82.48
46.39
29.69
20.62
11.60
0.083
5.00
13.9
103.10
57.99
37.12
25.77
14.50
kV
Isc (kA)
Grounding
Seconds
34.500
16.866
Grounded
0.008
0.50
4.7
11.88
6.68
0.033
2.00
9.5
47.52
26.73
0.050
3.00
11.6
71.29
40.10
0.067
4.00
13.4
95.05
0.083
5.00
15.0
118.81
0.100
6.00
16.4
0.133
8.00
18.9
0.167
10.00
0.333
20.00
0.500
34.500
14.636
Grounded
Arc in Cubic Box
Distance from Arc Electrodes (inches)
Cycles
2.90
30
1.86
Flash Protection
Boundary (ft)
Distance from Arc Electrodes (inches)
18
24
30
36
48
ETAP
Page:
3
Date:
09-30-2014
Contract:
SN:
85OTI30125
Engineer:
Revision: Base
Project:
5.0.3Z
Location:
Filename:
Study Case: SC
attl
Config.:
Normal
Incident Energy Exposure (Calorie/cm²)
Arc in Open Air
Bus
ID
Bus6
Bus7
Arc Duration
Flash Protection
Boundary (ft)
18
30
36
48
69.59
44.54
30.93
17.40
92.79
59.39
41.24
23.20
206.20
115.99
74.23
51.55
29.00
27.9
412.40
231.97
148.46
103.10
57.99
34.1
618.60
347.96
222.69
154.65
86.99
39.4
824.79
463.95
296.93
206.20
115.99
44.0
1030.99
579.93
371.16
257.75
144.98
60.00
48.3
1237.19
695.92
445.39
309.30
173.98
70.00
52.1
1443.39
811.91
519.62
360.85
202.98
80.00
55.7
1649.59
927.89
593.85
412.40
231.97
1.500
90.00
59.1
1855.79
1043.88
668.08
463.95
260.97
1.667
100.00
62.3
2061.98
1159.87
742.31
515.50
289.97
1.833
110.00
65.3
2268.18
1275.85
816.55
567.05
318.96
2.000
120.00
68.2
2474.38
1391.84
890.78
618.60
347.96
0.004
0.25
0.4
0.07
0.04
0.03
0.02
0.01
0.008
0.50
0.5
0.15
0.08
0.05
0.04
0.033
2.00
1.0
0.58
0.33
0.21
0.15
0.050
3.00
1.3
0.87
0.49
0.31
0.067
4.00
1.5
1.16
0.65
0.42
0.083
5.00
1.6
1.45
0.82
0.100
6.00
1.8
1.74
0.133
8.00
2.1
2.32
0.167
10.00
2.3
0.333
20.00
3.3
0.500
30.00
4.0
kV
Isc (kA)
Grounding
Seconds
34.500
14.636
Grounded
0.100
6.00
15.3
123.72
0.133
8.00
17.6
164.96
0.167
10.00
19.7
0.333
20.00
0.500
30.00
0.667
40.00
0.833
50.00
1.000
1.167
1.333
4.160
10.378
Grounded
Arc in Cubic Box
Distance from Arc Electrodes (inches)
Cycles
24
Flash Protection
Boundary (ft)
Distance from Arc Electrodes (inches)
18
24
30
36
48
0.1
0.09
0.07
0.06
0.05
0.04
0.02
0.2
0.19
0.14
0.11
0.09
0.07
0.08
0.9
0.74
0.56
0.45
0.38
0.29
0.22
0.12
1.4
1.12
0.84
0.68
0.57
0.43
0.29
0.16
1.9
1.49
1.13
0.91
0.76
0.57
0.52
0.36
0.20
2.4
1.86
1.41
1.13
0.95
0.72
0.98
0.63
0.44
0.24
2.8
2.23
1.69
1.36
1.14
0.86
1.31
0.84
0.58
0.33
3.8
2.98
2.25
1.81
1.52
1.15
2.90
1.63
1.04
0.73
0.41
4.8
3.72
2.82
2.27
1.90
1.43
5.80
3.27
2.09
1.45
0.82
9.8
7.45
5.63
4.53
3.79
2.87
8.71
4.90
3.13
2.18
1.22
14.9
11.17
8.45
6.80
5.69
4.30
ETAP
Page:
4
Date:
09-30-2014
Contract:
SN:
85OTI30125
Engineer:
Revision: Base
Project:
5.0.3Z
Location:
Filename:
Study Case: SC
attl
Config.:
Normal
Incident Energy Exposure (Calorie/cm²)
Arc in Open Air
Bus
ID
Bus7
Bus8
Arc Duration
Flash Protection
Boundary (ft)
18
30
36
48
6.53
4.18
2.90
1.63
8.16
5.22
3.63
2.04
17.41
9.80
6.27
4.35
6.2
20.32
11.43
7.31
6.6
23.22
13.06
8.36
90.00
7.0
26.12
14.69
100.00
7.4
29.02
16.33
110.00
7.7
31.93
17.96
120.00
8.1
34.83
19.59
0.004
0.25
0.4
0.07
0.008
0.50
0.5
0.033
2.00
1.0
0.050
3.00
0.067
4.00
0.083
kV
Isc (kA)
Grounding
Seconds
Cycles
4.160
10.378
Grounded
0.667
40.00
4.7
11.61
0.833
50.00
5.2
14.51
1.000
60.00
5.7
1.167
70.00
1.333
80.00
1.500
1.667
1.833
2.000
4.160
10.378
Grounded
Arc in Cubic Box
Distance from Arc Electrodes (inches)
24
Flash Protection
Boundary (ft)
Distance from Arc Electrodes (inches)
18
24
30
36
48
20.0
14.90
25.1
18.62
11.26
9.06
7.59
5.74
14.08
11.33
9.49
2.45
30.3
7.17
22.35
16.89
13.59
11.38
8.60
5.08
2.86
5.80
3.27
35.5
26.07
19.71
15.86
13.28
10.04
40.7
29.79
22.52
18.13
15.18
11.47
9.40
6.53
10.45
7.26
3.67
45.9
33.52
25.34
20.39
17.08
12.91
4.08
51.2
37.24
28.15
22.66
18.97
14.34
11.49
12.54
7.98
4.49
56.5
40.97
30.97
24.92
20.87
15.78
8.71
4.90
61.8
44.69
33.78
27.19
22.77
0.04
17.21
0.03
0.02
0.01
0.1
0.09
0.07
0.06
0.05
0.04
0.15
0.58
0.08
0.05
0.04
0.02
0.2
0.19
0.14
0.11
0.09
0.07
0.33
0.21
0.15
0.08
0.9
0.74
0.56
0.45
0.38
0.29
1.3
1.5
0.87
0.49
0.31
0.22
0.12
1.4
1.12
0.84
0.68
0.57
0.43
1.16
0.65
0.42
0.29
0.16
1.9
1.49
1.13
0.91
0.76
5.00
0.57
1.6
1.45
0.82
0.52
0.36
0.20
2.4
1.86
1.41
1.13
0.95
0.72
0.100
0.133
6.00
1.8
1.74
0.98
0.63
0.44
0.24
2.8
2.23
1.69
1.36
1.14
0.86
8.00
2.1
2.32
1.31
0.84
0.58
0.33
3.8
2.98
2.25
1.81
1.52
1.15
0.167
10.00
2.3
2.90
1.63
1.04
0.73
0.41
4.8
3.72
2.82
2.27
1.90
1.43
0.333
20.00
3.3
5.80
3.27
2.09
1.45
0.82
9.8
7.45
5.63
4.53
3.79
2.87
0.500
30.00
4.0
8.71
4.90
3.13
2.18
1.22
14.9
11.17
8.45
6.80
5.69
4.30
0.667
40.00
4.7
11.61
6.53
4.18
2.90
1.63
20.0
14.90
11.26
9.06
7.59
5.74
0.833
50.00
5.2
14.51
8.16
5.22
3.63
2.04
25.1
18.62
14.08
11.33
9.49
7.17
1.000
60.00
5.7
17.41
9.80
6.27
4.35
2.45
30.3
22.35
16.89
13.59
11.38
8.60
1.167
70.00
6.2
20.32
11.43
7.31
5.08
2.86
35.5
26.07
19.71
15.86
13.28
10.04
1.333
80.00
6.6
23.22
13.06
8.36
5.80
3.27
40.7
29.79
22.52
18.13
15.18
11.47
ETAP
Page:
5
Date:
09-30-2014
Contract:
SN:
85OTI30125
Engineer:
Revision: Base
Project:
5.0.3Z
Location:
Filename:
Study Case: SC
attl
Config.:
Normal
Incident Energy Exposure (Calorie/cm²)
Arc in Open Air
Bus
ID
Bus8
Bus11
Bus15
Arc Duration
Flash Protection
Boundary (ft)
18
30
36
48
14.69
9.40
6.53
3.67
16.33
10.45
7.26
4.08
31.93
17.96
11.49
7.98
8.1
34.83
19.59
12.54
0.2
0.02
0.01
0.01
0.50
0.3
0.05
0.03
2.00
0.6
0.20
0.11
0.050
3.00
0.7
0.29
0.067
4.00
0.9
0.39
0.083
5.00
1.0
0.100
6.00
0.133
8.00
0.167
0.333
kV
Isc (kA)
Grounding
Seconds
4.160
10.378
Grounded
1.500
90.00
7.0
26.12
1.667
100.00
7.4
29.02
1.833
110.00
7.7
2.000
120.00
0.004
0.25
0.008
0.033
4.160
0.480
4.632
34.207
Grounded
Grounded
Arc in Cubic Box
Distance from Arc Electrodes (inches)
Cycles
24
Flash Protection
Boundary (ft)
Distance from Arc Electrodes (inches)
18
24
30
36
48
45.9
33.52
25.34
20.39
17.08
12.91
51.2
37.24
28.15
22.66
18.97
14.34
4.49
56.5
40.97
30.97
24.92
20.87
15.78
8.71
4.90
61.8
44.69
33.78
27.19
22.77
17.21
0.01
0.00
0.3
0.04
0.02
0.02
0.01
0.01
0.02
0.01
0.01
0.4
0.08
0.05
0.03
0.02
0.01
0.07
0.05
0.03
0.8
0.34
0.19
0.12
0.08
0.05
0.17
0.11
0.07
0.04
1.0
0.51
0.29
0.18
0.13
0.07
0.22
0.14
0.10
0.06
1.1
0.68
0.38
0.24
0.17
0.10
0.49
0.28
0.18
0.12
0.07
1.3
0.85
0.48
0.31
0.21
0.12
1.1
0.59
0.33
0.21
0.15
0.08
1.4
1.02
0.57
0.37
0.25
0.14
1.2
0.79
0.44
0.28
0.20
0.11
1.6
1.36
0.76
0.49
0.34
0.19
10.00
1.4
0.98
0.55
0.35
0.25
0.14
1.8
1.70
0.95
0.61
0.42
0.24
20.00
1.9
1.97
1.11
0.71
0.49
0.28
2.5
3.39
1.91
1.22
0.85
0.48
0.500
30.00
2.4
2.95
1.66
1.06
0.74
0.41
3.1
5.09
2.86
1.83
1.27
0.72
0.667
40.00
2.7
3.93
2.21
1.42
0.98
0.55
3.6
6.79
3.82
2.44
1.70
0.95
0.833
50.00
3.0
4.92
2.76
1.77
1.23
0.69
4.0
8.48
4.77
3.05
2.12
1.19
1.000
60.00
3.3
5.90
3.32
2.12
1.47
0.83
4.4
10.18
5.73
3.66
2.55
1.43
1.167
70.00
3.6
6.88
3.87
2.48
1.72
0.97
4.7
11.88
6.68
4.28
2.97
1.67
1.333
80.00
3.8
7.86
4.42
2.83
1.97
1.11
5.0
13.57
7.64
4.89
3.39
1.91
1.500
90.00
4.1
8.85
4.98
3.19
2.21
1.24
5.3
15.27
8.59
5.50
3.82
2.15
1.667
100.00
4.3
9.83
5.53
3.54
2.46
1.38
5.6
16.97
9.54
6.11
4.24
2.39
1.833
110.00
4.5
10.81
6.08
3.89
2.70
1.52
5.9
18.66
10.50
6.72
4.67
2.62
2.000
120.00
4.7
11.80
6.64
4.25
2.95
1.66
6.2
20.36
11.45
7.33
5.09
2.86
0.004
0.25
0.6
0.17
0.09
0.06
0.04
0.02
0.8
0.33
0.19
0.12
0.08
0.05
ETAP
Page:
6
Date:
09-30-2014
Contract:
SN:
85OTI30125
Engineer:
Revision: Base
Project:
5.0.3Z
Location:
Filename:
Study Case: SC
attl
Config.:
Normal
Incident Energy Exposure (Calorie/cm²)
Arc in Open Air
Bus
ID
Bus15
Bus17
Arc Duration
kV
Isc (kA)
Grounding
0.480
34.207
Grounded
4.160
10.378
Grounded
Seconds
Cycles
Flash Protection
Boundary (ft)
Arc in Cubic Box
Distance from Arc Electrodes (inches)
18
24
30
36
48
Flash Protection
Boundary (ft)
Distance from Arc Electrodes (inches)
18
24
30
36
48
0.008
0.50
0.8
0.34
0.19
0.12
0.08
0.05
1.1
0.66
0.37
0.24
0.17
0.09
0.033
2.00
1.6
1.34
0.75
0.48
0.34
0.19
2.2
2.66
1.50
0.96
0.66
0.37
0.050
3.00
1.9
2.01
1.13
0.72
0.50
0.28
2.7
3.99
2.24
1.44
1.00
0.56
0.067
4.00
2.2
2.68
1.51
0.96
0.67
0.38
3.2
5.32
2.99
1.91
1.33
0.75
0.083
5.00
2.5
3.35
1.88
1.21
0.84
0.47
3.5
6.65
3.74
2.39
1.66
0.93
0.100
6.00
2.7
4.02
2.26
1.45
1.01
0.57
3.9
7.98
4.49
2.87
1.99
1.12
0.133
8.00
3.2
5.36
3.02
1.93
1.34
0.75
4.5
10.63
5.98
3.83
2.66
1.50
0.167
10.00
3.5
6.70
3.77
2.41
1.68
0.94
5.0
13.29
7.48
4.79
3.32
1.87
0.333
20.00
5.0
13.40
7.54
4.82
3.35
1.88
7.1
26.59
14.95
9.57
6.65
3.74
0.500
30.00
6.1
20.10
11.31
7.24
5.03
2.83
8.6
39.88
22.43
14.36
9.97
5.61
0.667
40.00
7.1
26.80
15.08
9.65
6.70
3.77
10.0
53.17
29.91
19.14
13.29
7.48
0.833
50.00
7.9
33.50
18.84
12.06
8.38
4.71
11.2
66.47
37.39
23.93
16.62
9.35
1.000
60.00
8.7
40.20
22.61
14.47
10.05
5.65
12.2
79.76
44.86
28.71
19.94
11.22
1.167
70.00
9.4
46.90
26.38
16.88
11.73
6.60
13.2
93.05
52.34
33.50
23.26
13.09
1.333
80.00
10.0
53.60
30.15
19.30
13.40
7.54
14.1
106.34
59.82
38.28
26.59
14.95
1.500
90.00
10.6
60.30
33.92
21.71
15.08
8.48
15.0
119.64
67.30
43.07
29.91
16.82
1.667
100.00
11.2
67.00
37.69
24.12
16.75
9.42
15.8
132.93
74.77
47.86
33.23
18.69
1.833
110.00
11.8
73.70
41.46
26.53
18.43
10.36
16.6
146.22
82.25
52.64
36.56
20.56
2.000
120.00
12.3
80.40
45.23
28.94
20.10
11.31
17.3
159.52
89.73
57.43
39.88
22.43
0.004
0.25
0.3
0.06
0.03
0.02
0.01
0.01
0.4
0.10
0.06
0.04
0.02
0.01
0.008
0.50
0.5
0.12
0.07
0.04
0.03
0.02
0.6
0.20
0.11
0.07
0.05
0.03
0.033
2.00
0.9
0.46
0.26
0.17
0.12
0.07
1.2
0.80
0.45
0.29
0.20
0.11
0.050
3.00
1.1
0.69
0.39
0.25
0.17
0.10
1.5
1.20
0.67
0.43
0.30
0.17
0.067
4.00
1.3
0.93
0.52
0.33
0.23
0.13
1.7
1.60
0.90
0.58
0.40
0.22
0.083
5.00
1.5
1.16
0.65
0.42
0.29
0.16
1.9
2.00
1.12
0.72
0.50
0.28
ETAP
Page:
7
Date:
09-30-2014
Contract:
SN:
85OTI30125
Engineer:
Revision: Base
Project:
5.0.3Z
Location:
Filename:
Study Case: SC
attl
Config.:
Normal
Incident Energy Exposure (Calorie/cm²)
Arc in Open Air
Bus
ID
Bus17
Bus20
Arc Duration
kV
Isc (kA)
Grounding
4.160
10.378
Grounded
0.480
8.575
Grounded
Seconds
Cycles
Flash Protection
Boundary (ft)
Arc in Cubic Box
Distance from Arc Electrodes (inches)
18
24
30
36
48
Flash Protection
Boundary (ft)
Distance from Arc Electrodes (inches)
18
24
30
36
48
0.100
6.00
1.6
1.39
0.78
0.50
0.35
0.20
2.1
2.40
1.35
0.86
0.60
0.34
0.133
8.00
1.9
1.85
1.04
0.67
0.46
0.26
2.4
3.20
1.80
1.15
0.80
0.45
0.167
10.00
2.1
2.32
1.30
0.83
0.58
0.33
2.7
4.00
2.25
1.44
1.00
0.56
0.333
20.00
2.9
4.63
2.61
1.67
1.16
0.65
3.9
8.00
4.50
2.88
2.00
1.12
0.500
30.00
3.6
6.95
3.91
2.50
1.74
0.98
4.7
11.99
6.75
4.32
3.00
1.69
0.667
40.00
4.2
9.27
5.21
3.34
2.32
1.30
5.5
15.99
9.00
5.76
4.00
2.25
0.833
50.00
4.7
11.58
6.52
4.17
2.90
1.63
6.1
19.99
11.24
7.20
5.00
2.81
1.000
60.00
5.1
13.90
7.82
5.00
3.47
1.95
6.7
23.99
13.49
8.64
6.00
3.37
1.167
70.00
5.5
16.22
9.12
5.84
4.05
2.28
7.2
27.99
15.74
10.08
7.00
3.94
1.333
80.00
5.9
18.53
10.42
6.67
4.63
2.61
7.7
31.98
17.99
11.51
8.00
4.50
1.500
90.00
6.3
20.85
11.73
7.51
5.21
2.93
8.2
35.98
20.24
12.95
9.00
5.06
1.667
100.00
6.6
23.17
13.03
8.34
5.79
3.26
8.7
39.98
22.49
14.39
10.00
5.62
1.833
110.00
6.9
25.48
14.33
9.17
6.37
3.58
9.1
43.98
24.74
15.83
10.99
6.18
2.000
120.00
7.2
27.80
15.64
10.01
6.95
3.91
9.5
47.98
26.99
17.27
11.99
6.75
0.004
0.25
0.3
0.04
0.02
0.02
0.01
0.01
0.4
0.09
0.05
0.03
0.02
0.01
0.008
0.50
0.4
0.09
0.05
0.03
0.02
0.01
0.6
0.18
0.10
0.06
0.04
0.02
0.033
2.00
0.8
0.35
0.20
0.13
0.09
0.05
1.1
0.70
0.39
0.25
0.18
0.10
0.050
3.00
1.0
0.53
0.30
0.19
0.13
0.07
1.4
1.05
0.59
0.38
0.26
0.15
0.067
4.00
1.2
0.71
0.40
0.25
0.18
0.10
1.6
1.40
0.79
0.51
0.35
0.20
0.083
5.00
1.3
0.88
0.50
0.32
0.22
0.12
1.8
1.75
0.99
0.63
0.44
0.25
0.100
6.00
1.4
1.06
0.60
0.38
0.27
0.15
2.0
2.10
1.18
0.76
0.53
0.30
0.133
8.00
1.6
1.41
0.80
0.51
0.35
0.20
2.3
2.81
1.58
1.01
0.70
0.39
0.167
10.00
1.8
1.77
0.99
0.64
0.44
0.25
2.6
3.51
1.97
1.26
0.88
0.49
0.333
20.00
2.6
3.54
1.99
1.27
0.88
0.50
3.6
7.02
3.95
2.53
1.75
0.99
0.500
30.00
3.2
5.30
2.98
1.91
1.33
0.75
4.4
10.52
5.92
3.79
2.63
1.48
ETAP
Page:
8
Date:
09-30-2014
Contract:
SN:
85OTI30125
Engineer:
Revision: Base
Project:
5.0.3Z
Location:
Filename:
Study Case: SC
attl
Config.:
Normal
Incident Energy Exposure (Calorie/cm²)
Arc in Open Air
Bus
ID
Bus20
Arc Duration
Flash Protection
Boundary (ft)
Arc in Cubic Box
Distance from Arc Electrodes (inches)
18
36
48
3.98
2.55
1.77
0.99
5.1
4.97
3.18
2.21
1.24
5.7
10.61
5.97
3.82
2.65
1.49
4.8
12.38
6.96
4.46
3.09
5.1
14.15
7.96
5.09
3.54
90.00
5.5
15.91
8.95
5.73
100.00
5.8
17.68
9.95
6.37
110.00
6.0
19.45
10.94
120.00
6.3
21.22
11.94
Isc (kA)
Grounding
Seconds
Cycles
0.480
8.575
Grounded
0.667
40.00
3.6
7.07
0.833
50.00
4.1
8.84
1.000
60.00
4.5
1.167
70.00
1.333
80.00
1.500
1.667
1.833
2.000
*
Indicates bus votage is below the minimum allowable valued of 0.208 kV for the empirically derived model.
#
Indicates bolted fault current is out of the 0.7 kA-106 kA range allowable for the empirically derived model.
24
Flash Protection
Boundary (ft)
30
kV
Distance from Arc Electrodes (inches)
24
30
36
48
14.03
7.89
5.05
3.51
1.97
17.54
9.87
6.31
4.39
2.47
6.3
21.05
11.84
7.58
5.26
2.96
1.74
6.8
24.56
13.81
8.84
6.14
3.45
1.99
7.3
28.07
15.79
10.10
7.02
3.95
3.98
2.24
7.7
31.57
17.76
11.37
7.89
4.44
4.42
2.49
8.1
35.08
19.73
12.63
8.77
4.93
7.00
4.86
2.74
8.5
38.59
21.71
13.89
9.65
5.43
7.64
5.30
2.98
8.9
42.10
23.68
15.16
10.52
5.92
*# Indicates bus voltage is below the minimum allowable value of 0.208 kV and bolted fault current is out of the 0.7 kA-106 kA range allowable for empirically derived method.