zaphod1
Electrical
- May 7, 2003
- 46
About once a month a QA200 fuse clears on the utility riser at our plant. There has been no indication as to why it blows. We have a 2000 KVA 12470-> 480volt transformer. On the load (480v)side beyond the main CB there is a fixed bank of 400 KVar caps installed. We have had no indication of faults in the load side, and in fact, as soon as the fuse is replaced we can start up and run everything as normal. The Utility is at a loss to explain the problem. My question is "can the fixed caps be creating problems on the line side of the transformer causing the fuse to heat?"