Baxter OV310E Oven Breaker Assy 01-1000V6-00310 01 BAX 1M7510-00001 BAX01-1000V6-00266 Baxter 01-1M7546-00001 KIT Replacement Unit For the above part numbers.
Simply put this breaker will trip when voltage is lost. Usually these are used to make sure all power is Tripped off if power is lost on the 120-volt side. To reset 120 volts must be present on the white, black 120v leads and then you can reset the breaker which will allow power transfer between 3 phase wires.
Some models have the two 120-volt hook ups on the front. The newer replacement models have them front and back on the 120V aux breaker on the side marked white, black. Attach your 120 volt leads There. If one lead is not long enough, you will need to extend the wire.