I will be getting around to doing a vfd swap on my clausing 5914 very soon and would like to get everything I need rounded up. The lathe has the factory 2 horse motor on it (I know probably not the best insulation on the wires in the motor for vfd). I am going to be using a 230v toshiba drive rated for 5hp and will be powering it with single phase fed from a 30 breaker in the panel.
My question is should I be using a smaller breaker down the line to protect the vfd and motor from over load? Is the sizing still the same when you are powering a 3 phase motor with a drive on single phase? I know at work that the breaker size for 3ph motors is what is stated for FLA on the motor name plate. Thanks.