Sparky1981
PE
- Location
- Denver, CO
- Occupation
- Electrical/Lighting Engineer
I am working on an industrial plant that has (6) 2000A services providing power to the facility (reasons for this are beyond my control). Anyway, one of the 2000A services has two 600HP motors connected to it. Nameplate says the FLA is 673A. I have sized the overcurrent protection for each motor as 1600A breakers, close to the max size NEC will allow. The motors will NOT start at the same time. The motors are of course connected to a soft start starter. My question is am I going to be tripping my 2000A main breaker when one of these motors is running and the other is starting? I wish the industrial engineer ordering the starters would get me some information on starting amps but I doubt I will get this in time before the gear is ordered.
I typically work in commercial so its not often I deal with motors this large. Figured I would pick your brains.
Any thoughts on this?
Thanks in advance.
I typically work in commercial so its not often I deal with motors this large. Figured I would pick your brains.
Any thoughts on this?
Thanks in advance.