metallica5
Member
- Location
- Metro DC
I have a 3 phase 480/277 2500 amp main switchboard that is fed from both a 400kw fuel cell and utility power. The fuel cell is to be the main source of power until it reaches it's capacity. Once fuel cell capacity is reached, Utility power will supplement. Utility power comes into main breaker in switchboard while the fuel cell power comes in via an 800 amp branch breaker. While the main board is being fed simultaneously from both sources, what determines that the loads will be served by the fuel cell power first?