i Am making a controller unit for my compressor, and I am stuck. the logic of ooperation is a cake walk but I want to include a 120 outlet on it to plug a fan into and be controlled by the unnit.
I have 240 single phase coming in to the controller. I am getting a step down transformer to drop to 120 vac. How should that transformer be wired on the output. one leg to case to make it compatable to house wiring ( neutral and hot. or will that put a hot on the case. I am thinking shipbuard systems where each leg of 120 is 60vac but out of phase to et 120. All that is coming in is a pair of leads making 240 and a case grounding line connected to the unit case.
With one leg on the case i only have to switch one line with the relay. If they are both hot I would have to switch both legs, than the question becomes what dies the fan do with it. If it is case grounded or gets a case ground would i get a charge touching the fan and any grounded item. I dont have 120 outlets near by the fill station.
I have 240 single phase coming in to the controller. I am getting a step down transformer to drop to 120 vac. How should that transformer be wired on the output. one leg to case to make it compatable to house wiring ( neutral and hot. or will that put a hot on the case. I am thinking shipbuard systems where each leg of 120 is 60vac but out of phase to et 120. All that is coming in is a pair of leads making 240 and a case grounding line connected to the unit case.
With one leg on the case i only have to switch one line with the relay. If they are both hot I would have to switch both legs, than the question becomes what dies the fan do with it. If it is case grounded or gets a case ground would i get a charge touching the fan and any grounded item. I dont have 120 outlets near by the fill station.