How do I wire a cutler hammer a10ago for 115 volt
I'm going to take a guess and say you are dropping a 230v motor down to a 115v motor.
If the original motor on your equipment was 3 phase, then you need to change motors.
On the other hand, if the equipment had a 230v single phase and you are switching the motor wires so you can plug the equipment into an available 115v outlet, then I would suggest reconsidering. I would recommend running a 220v service line to your equipment instead. It will save on your electric bill and the motor will last longer. A 115v motor pulls twice as much amperage as the same motor running on 230v. (it may even be too much for the 115v outlet you are planing on using) Your variable rate electric meter will tell your power company to up the rate you pay per kilowatt-hour when you use power at a lower voltage but higher amperage rate.
That said, you need to make sure that the coil in your fancy starter switch is a 115v coil. (it probably is) When you hook up the 115v plug, you need to make sure that the black wire in the Starter Switch is the wire that the switch borrows power from to kick start the magnet that keeps the circuit closed. Beyond that , you probably don't have to do anything in the switch. If there's a red wire, you can just disconnect it and tape it off and do the same in the plug.
If the a10ago's function is a mystery, it will help to understand how it works:
Basically, the contactor has three switches side by side. Where the power comes into the box, there's what looks like a lot of extra screws. That's where the thermal protector is (circuit breaker) that will protect your motor at the proper level designed for the motor. The switch has a spring that holds it open so the motor won't run. But there's an electro magnet that can hold the circuit closed. That magnet is only energized when the switch is closed because even though one of its leads is connected to the hot side of the switch, the other lead is connected past the contactor which has no power when the switch is off.
Your 'START' push button momentarily energizes the coil (or maybe it just overpowers the spring and physically pushes the switch closed). The switch closes and the motor runs and keeps running because the coil is energized. Your 'STOP' button momentarily cuts current to the coil and the switch pops open.
The purpose of this contraption is:
1. It contains a circuit breaker suited for just the motor that is running, not for every load on the circuit.
2. It has contacts that will wear much longer than a standard switch.
3. If your shop loses power with the motor running and then the power comes back on later, your motor wont start running by itself. It will wait until you press the 'START' button.
Oct 09, 2014 |