This may be a little hard to follow, please bear with me. I have installed a rotary phase converter and it is producing 3 phase power to 3 phase panel. I ran my 10/4 wire to test my Moak jointer and it started fine. Used same to test Oliver planer connecting to disconnect on the planner. The planer motors were wired high voltage. I reconnected both for low voltage at the motor access boxes. When I hit the start button just a slight hum at the magnetic starter (not chatter). My question, is it possible that by reduced line voltage is not compatible with the starter. Starter picture below, notice 400v. Also not familiar w/factory Oliver switch, the upper button (black/start) stayed in when I pushed it (not under power). Could be it pops out when stop button is pushed or just need a good cleaning. Thanks in advance.