Appendix
A
Connection cable cross section, HRC fuse rating
Recommendations to VDE 0100 for fusing and cable cross sections for three phase power
capacitors are listed below.
VDE 0100 recommendations
Cross-section values mentioned below are guideline values valid for operation under normal
conditions and at an ambient temperature of 40 °C. Higher values should be selected if
conditions differ from the norm, such as higher temperatures or harmonic distortion.
Kvar rating at 400 V
kvar
Nominal current
A
HRC fuse rating
A
Cross section of supply
cable
mm
2
5
7,2
16
1,5
6,3
9
16
2,5
7,5
10,8
20
2,5
8,3
12
20
2,5
10
14,4
25
4
12,5
18
35
4
15
21,6
35
6
20
29
50
10
25
36
63
16
30
43
80
25
40
58
100
35
50
72
125
35
56 kvar, 440 V
73,5
125
35
60 kvar, 440 V
78,7
160
35
Other voltage ratings
230 V
table figure x 1,74
440 V
table figure x 0,91
480 V
table figure x 0,83
525 V
table figure x 0,76
690 V
table figure x 0,58
800 V
table figure x 0,50
The internal wiring of a capacitor bank can be normally done with a lower cross section.
Various parameters such as temperature inside cabinet, quality of cable, maximum cable
isolation
temperature, single or multicore cable and length of cable have to be taken into
consideration when selecting the appropriate value.
Installation and maintenance instructions for Power Factor Correction (PFC) capacitors
Installation Manual, 05/2022, L1V30884033A
31
