ABB ACS880-11 - Calculating the Short-Circuit Current of the Installation

Supply transformer minimum apparent power S
n
(kVA)Cable typeACS880-
11-…
Maximum cable length with
aR fuses
Maximum cable length with
gG fuses
Alumin-
um
Copper
200 m100 m10 m100 m50 m10 mmm
2
mm
2
U
n
= 400 V
5.03.43.18.46.25.8-3×1.509A4-3
5.03.43.18.46.25.8-3×1.512A6-3
6.25.95.8109.89.6-3×6017A-3
6.25.95.8131212-3×6025A-3
8.78.38.2181717-3×10032A-3
8.78.38.2212019-3×10038A-3
1514132624243×253×16045A-3
2019184239393×253×25061A-3
2524235249483×353×35072A-3
3835345249483×503×35087A-3
U
n
= 500 V
5.04.13.98.97.57.2-3×1.507A6-5
5.04.13.98.97.57.2-3×1.511A0-5
7.67.37.2121212-3×6014A-5
7.67.37.2161515-3×6021A-5
111010222121-3×10027A-5
111010252424-3×10034A-5
1817173130303×353×16040A-5
1918185149483×353×25052A-5
3029296361603×503×35065A-5
4643426361603×703×35077A-5
￭ Calculating the short-circuit current of the installation
Check that the short-circuit current of the installation is at least the value given in the
fuse table.
The short-circuit current of the installation can be calculated as follows:
I
k2-ph
=
2 ·
R
c
2
+ (Z
k
+ X
c
)
2
U
where
Short-circuit current in symmetrical two-phase short-circuit
I
k2-ph
Network line-to-line voltage (V)
U
174 Technical data