ABB ACS 600 - Example

Appendix A – ACS/ACC/ACP 601 Technical Data
ACS/ACC/ACP 601 Frequency Converters A-9
Example For ACS 601-0120-3, the recommended fuses for the input bridge protection are 400 A
ultrarapid fuses.
The values
I
2N
, I
2hd
and I
2Nsq
for ACS 601-0120-3 are 178 A, 147 A and 200 A
respectively. 1.1 · 178 A = 195.8 A and 1.5 · 147 A = 220.5 A and 1.0 · 200 A = 200 A.
Normal fuses with nominal currents higher than 195.8 A or 220.5 A or 200 A can be
used to protect the input cable; thus, 200 A or 250 A fuses are selected depending on
the use (normal, heavy-duty or pump and fan, respectively).