Guys

I'm just doing a single to 3 phase conversion on a lathe and just ordered a 3HP (2.2kw) phase inverter for it. I'm have to redo all the electrics completely and want to add a contactor and mcb fuses (replace the old ceramic bulb type). When i did my mill conversion i changed the motor to a single phase motor and reused the existing contactor without much thought. The question is should i rate the contactor at the fuseable value of the inverter (25amp) or go much higher?

Cheers