cyriousn
Electrical
- Jul 19, 2017
- 24
I'm reviewing a project where there is a 270MVA 161/34.5kv transformer and no main circuit breaker on the 34.5kv bus. (I don't know of any circuit breaker for 34.5kv that is higher than 3000A which is a force air cooled switchgear breaker)
The 34.5kv bus has (8) 600A breakers. (7) of the breakers are connected to PV collector circuits and (1) is connected to a cap bank.
Is there any limit of how many circuit breakers can be on a 34.5kv bus without a main circuit breaker? I used to work in the commercial NEC realm so I keep thinking back to the 6 disconnect rule but I don't think that applies here. Any help here is much appreciated!
The 34.5kv bus has (8) 600A breakers. (7) of the breakers are connected to PV collector circuits and (1) is connected to a cap bank.
Is there any limit of how many circuit breakers can be on a 34.5kv bus without a main circuit breaker? I used to work in the commercial NEC realm so I keep thinking back to the 6 disconnect rule but I don't think that applies here. Any help here is much appreciated!
