Install Instructions

S1A53832 03/2019 25
Example of Calculation with Copper Cable, Without Filter
Transformer
50 Hz
U
400 Vac
Usc
Cable Cross
Section
Isc depending on cable length in m(ft)
10
(33)
20
(66)
40
(131)
80
(262)
100
(328)
160
(525)
200
(656)
320
(1050)
kVA %
mm
2
(AWG)
kA kA kA kA kA kA kA kA
100 4 2.5 (14) 2.3 1.4 0.8 0.4 0.3 0.2 0.2 0.1
4 (12) 2.9 2.0 1.2 0.6 0.5 0.3 0.2 0.2
6 (10) 3.2 2.6 1.6 0.9 0.7 0.5 0.4 0.2
10 (8) 3.4 3.1 2.3 1.4 1.2 0.8 0.6 0.4
25 (4) 3.5 3.4 3.1 2.5 2.2 1.6 1.4 0.9
50 (0) 3.5 3.5 3.3 3.0 2.8 2.3 2.1 1.5
70 (00) 3.5 3.5 3.4 3.1 2.9 2.6 2.3 1.8
120 (250 MCM) 3.6 3.5 3.4 3.2 3.1 2.8 2.6 2.1
250 4 6 (10) 5.7 3.4 1.8 0.9 0.7 0.5 0.4 0.2
10 (8) 7.1 5.0 2.9 1.5 1.2 0.8 0.6 0.4
25 (4) 8.4 7.4 5.5 3.4 2.8 1.8 1.5 0.9
50 (0) 8.6 8.1 7.0 5.2 4.5 3.2 2.7 1.8
70 (00) 8.6 8.2 7.3 5.8 5.2 3.9 3.3 2.3
120 (250 MCM) 8.7 8.3 7.6 6.5 6.0 4.8 4.2 3.0
400 4 6 (10) 6.6 3.6 1.8 0.9 0.7 0.5 0.4 0.2
10 (8) 9.2 5.6 3.0 1.5 1.2 0.8 0.6 0.4
25 (4) 12 9.9 6.5 3.6 2.9 1.9 1.5 1.0
50 (0) 13 12 9.3 6.1 5.1 3.4 2.8 1.8
70 (00) 13 12 10 7.2 6.2 4.4 3.6 2.4
120 (250 MCM) 13 13 11 8.6 7.6 5.7 4.9 3.4
800 6 6 (10) 6.9 3.7 1.9 0.9 0.7 0.5 0.4 0.2
10 (8) 10 5.8 3.0 1.5 1.2 0.8 0.6 0.4
25 (4) 15 11 6.9 3.7 3.0 1.9 1.5 1.0
50 (0) 17 15 11 6.5 5.4 3.5 2.9 1.8
70 (00) 17 15 12 7.9 6.7 4.6 3.7 2.4
120 (250 MCM) 17 16 13 9.8 8.6 6.2 5.2 3.5
1000 6 6 (10) 7.1 3.7 1.9 0.9 0.7 0.5 0.4 0.2
10 (8) 11 6.0 3.1 1.5 1.2 0.8 0.6 0.4
25 (4) 18 12 7.1 3.7 3.0 1.9 1.5 1.0
50 (0) 21 17 12 6.7 5.5 3.6 2.9 1.8
70 (00) 21 18 13 8.4 7.0 4.7 3.8 2.4
120 (250 MCM) 22 19 16 11 9.3 6.5 5.4 3.6