We have a 60% design for a large industrial shop. The main service consists of 2 3MVA transformers each on feeding a 5000 amp main breaker in seperate enclosures. Each breaker feeds a section of bus with a N.O. tie breaker mid way in the bus. I see some problems with this arrangement. It makes more sense to me to put the tie breaker between the 2 mains and interlock them so on 2 of the 3 breakers can be closed at a time. Any thoughts or suggestions are appreciated.
Jim
Jim