Stand-Alone SS Circuit Sizing

[HarrySlother]

Hi guys, having issues sizing the feeder breaker and the wires ahead of a stand-alone soft start. (See picture). SS is going to be provided by others; I'm assuming it will have internal protection. Usually these are in MCCs so I don't have to deal with this.

Couple hang-ups:
1. Is there a way to size the feeder breaker, other than making it "large" enough that it won't cause nuisance tripping?

2. I'm assuming the primary wires need to be protected by the breaker. Is that correct? It just seems silly to have different sizes coming into and out of the soft start.

 

[ptonsparky]

IIRC the SS will limit the current but drag out the time to start.
The feeders to the SS are protected from overload by the SS so you need to worry only about short circuit protection.
The 500 seems fine to me. A 400 would probably work but...

Request information for the SS starter. That's the best method.