Hi guys,
I ran into this situation in a job site. Need to hookup a existing 3 phase 460v RTU with min circuit 21.7 amp and max fuse 30 amp, the space is supplied by 200 amp 120/208 3 phase. There is a existing 75kva step down transformer, was used to step down from 480 delta to 120-208 wye. I confirmed with the manufactor that this transformer could use in reverse to step up. The question is would the 200 amp service we have can handle this transformer, the only load would be the RTU at 21.7 amp. If so, can I use a 30 amp fused disconnect on the secondary.
Thanks.
I ran into this situation in a job site. Need to hookup a existing 3 phase 460v RTU with min circuit 21.7 amp and max fuse 30 amp, the space is supplied by 200 amp 120/208 3 phase. There is a existing 75kva step down transformer, was used to step down from 480 delta to 120-208 wye. I confirmed with the manufactor that this transformer could use in reverse to step up. The question is would the 200 amp service we have can handle this transformer, the only load would be the RTU at 21.7 amp. If so, can I use a 30 amp fused disconnect on the secondary.
Thanks.