Snowjob
Member
I have a 225 KVA transformer 12470/208 Wye Wye feeding my facility.
The transformer has 12470 VAC Cooper RTE Bay O Net fuses, #09, on its primary.
What are the implications of this 800 A Main Breaker?
( Should I ask them to hook up the bypassed fused disconnect switch?)
The transformer has 12470 VAC Cooper RTE Bay O Net fuses, #09, on its primary.
- The Main Disconnect Device is a Square D Micrologic MX 36800 Breaker with a 800A sensor unit. An abandoned fused disconnect switch is adjacent to it.
- Underneath it are two LX36600 breakers, both at 600A, One feeds the Critical panel and the other feeds the Essential panel.
- The full load current on a 225 KVA transformer at 208 V is 625 A.
- The 800A Main Disconnect Breaker is wreaking havoc on my Coordination and Arcflash calculations. Luckily the Transfomer fuses are there.
- One minor thing. The 225 KVA Transformer is fed from a pole 2 miles away on a remote mountain thats often snowed in. If the transformer primaries blow, it might take up to 2 days for someone to climb the pole and restore service.
What are the implications of this 800 A Main Breaker?
( Should I ask them to hook up the bypassed fused disconnect switch?)