As you know that we use cont actors for 3 phase motor for controlling, and we also know the advantages of contectors, so what bad thing if we instill a contactor for single phase motor. Note that we did not use contactor for one phase motor mostly because this connection can be done by a single or double pole breaker.
But There are many benefits of contactor,
E.g example you can easily switch on motor by pressing a small push button switch, you can easily switch off by easily pushing off button or normal close button.
If the incoming voltage low some time, the magnetic contactor will not set and your motor will be safe form burning in low voltage case.
This is good for those countries where the load shedding problem are living, i use in my home a cont actor for my one phase water pump motor because i am living in Pakistan and Pakistan are numbering in those countries where the load shedding are living.
So my water pump motor is instill so far away form my living room. Now i am telling my story, one day i switch on by one phase water pump motor and after some time the power went. I forgot to switch off the motor breaker and i go to market.
In that time there is no one in my home and after some time after my let off home the electric power come back and motor started automatically due the switch on circuit breaker because i forgot to switch it off. So When i come back to home and i open my home main door by using the key. I find that my motor was burn due to continuously working or due to low voltage coming. I don't know what happened.
Also Read Below:
How to wire One phase motor with circuit breaker?
How to wire contactor for 3 phase motor?
After rewinding the electric motor, i think about the solution of this problem and safe form this accident again and i find out the motor cont actor is a best for this work.
Now i instill a magnetic contactor with My single phase motor wiring connection for switch off / on and there is no need switch off the motor after load shedding or power went.
Single Phase Motor Wiring With Contactor DiagramI chose diagram to tech you online and i always try to write and design by post simple to understand. I also published 3 phase motor wiring diagram which wired with contactor. This wiring connection is also easy as 3 phase motor wiring.
You need to wire you normally close and normally open switch with cont actor as i wired in my last contactor diagram. But there is no change between my last diagram that i did not instill the overload relay but you can use reset able overload for protecting your motor. My below single phase motor wiring with contactor diagram is too simple that there is no need to explain it words.
The above diagram is a complete method of single phase motor wiring with circuit breaker and contactor. In the above one phase motor wiring i first connect a 2 pole circuit breaker and after that i connect the supply to motor starter and then i do cont actor coil wiring with Normally Close push button switch and Normally Open push button switch and in last i do connection between capacitor start motor and contactor.
I think know you will be able do the single phase motor wiring with contactor after this diagram.