jdping2
Member
- Location
- Monterey ca
Thank you to all memebers that commented on my previous post related to how to size primary fuse size , x former size and secondary panel sizing. Scope of work has changed and I am a bit embarassed to admit that I lack the skills to perform voltage cals to size equipment. I say this after completing a theory course years back. I have 8 step Van EV chargers, I have access within the faclitiy to up to 400 amps at 480 volts. The owner is providing 10 chargers, and the chargers are not availabe in 480 volt, the chargers are 208 volt single phase , 8 of them. The owner does not want to factor in anything for future expansion, funds are limited, we are being asked to provide the minimum size allowable for the 120/208 3 phase panel that will feed the 8 chargers, as well as the transformer size and amperage size of main 480 volt breaker. Manufacturer of EV chargers is requesting 2 pole 100 amp breakers in new panel to feed each charger.
I have just performed a SWAG ( scientific wild a** guess) and have come up with 250 amp 480 volt primary breaker , 225 KVA transformer , 600 amp 120/208 3 phase distribution panel. Am I close? Could I reduce the size of primary breaker and transformer for value engineering?
I have just performed a SWAG ( scientific wild a** guess) and have come up with 250 amp 480 volt primary breaker , 225 KVA transformer , 600 amp 120/208 3 phase distribution panel. Am I close? Could I reduce the size of primary breaker and transformer for value engineering?
