Atlas Copco
Cable Calculator
Version 1.0
Cable Calculator
Calculation
Generator
Compressor
Source
×
Rubber Data
Tfactor Data
mm²
Rubber 90°C
Rubber 60°C
Vd*A*km
10
76
51
5.1
16
103
73
3.2
25
136
97
2.04
35
200
140
1.46
50
250
175
1.02
70
310
216
0.73
95
369
258
0.57
120
432
302
0.46
150
497
347
0.39
185
564
394
0.33
240
673
471
0.28
300
773
541
0.25
400
885
644
0.22
500
1017
738
0.2
630
1190
861
0.19
°C
Tfactor90
Tfactor60
10
1.15
1.15
15
1.12
1.12
20
1.08
1.08
25
1.04
1.04
30
1
1
35
0.95
0.91
40
0.91
0.82
45
0.86
0.71
50
0.82
0.58
55
0.76
0.41
60
0.7
65
0.64
70
0.57
75
0.5
80
0.4
85
0.28
Max conductor core temp
Rubber 90°C
Rubber 60°C
Input install power(package power)
(for compressor don't forget the cooling power)
kVA
Rated voltage
V
Total full line current
145
A
Ambient temp
10
15
20
25
30
35
40
45
50
55
60
°C
Derate factor
1
Outdoor usage
Yes
No
Derate factor
0.85
Cable touching
Yes
No
Derate factor
0.85
Select sizes of cable
Size (mm²)
Cables
Max current
Max A per cable
10
16
25
35
50
70
95
120
150
185
240
300
400
500
4
165
41
For cables longer than 30m continue here
Voltage drop + Short circuit calculation
Total length
m
Nominal rated protection
A
Voltage drop with nominal load
×
Voltage variations in 33 kV and 11kV feeders should not exceed the following limits at the farthest end, under peak load conditions & normal system operation regime:
Above 33kV (-) 12.5% to (+) 10%
Up to 33kV (-) 9.0% to (+) 6.0%
Low voltage (-) 6.0% to (+) 6.0%
37 (9%)
V
Short circuit current
1569
A
Maximum magnetic protection setting
1.2
Icc/In
