How To Do Contactor Wiring For 3 Phase Induction Motor With 3 Pole Circuit Breaker, Overload Relay, NO,NC Push Button Switches
In this tutorial post i will tell you about motor contactor wiring and it's diagram. But before we will disuse devises and working.
3 Pole Circuit Breaker CBFor 3P power supply we use to 3 pole circuit breaker for switching supply. Always use a CB before circuit wiring, from this you can make your circuit safe and we you will be able to switch off/on any time. You can also use 4 pole breaker, which is very best because you can control also the neutral wire.
MC Magnetic contactorFor 3 phase induction motor start/stop we use always MC contact or. It's is a type of electric relay which can switch the 3 electric connections easily. I also published post about motor starter working you can see on below links.
Click here for more information.
O/L Overload RelayOverload relay is protective device which make safe our electric motor form burning- during high current flowing to the induction motor. There are two popular types O/L relay which is thermal overload relay and Electronic overload relay. In this wiring diagram contactor, i shown thermal overload relay however soon i will make a diagram about electronic relay.
NC Normal Close Push Button SwitchFor motor contactor wiring we use push button switches for switching on/off the motor. NC means normal close which means that this push button is normally in close circuit and when we push, it's make an open electric circuit. I show NC with red color button and NO with Green color.
For details Click here.
NO Normal Open Push button SwitchThe Normal open S is normally in open electric circuit and if a person push this NO it's make NC circuit. For further information visit below link.
For more info click here.
MC Motor Starter Wiring Diagram With CB,MC,O/L, NO, NC
The symbol diagram is best but every one can't understand it easily that why i always focus on image+diagram which easy and simple to understand and good for learning. But you know that this diagram designing takes bag time from the time of symbol diagram. But i love my readers, as i am a student and struggling- for learning. I want to share all things which i learned.
Magnetic contactor relay wiring and circuit breaker , push button wiring method is simple. And i think that there is no importance to explain more after making diagram, however let's get a short tips journey.
For 3 phase motor controlling diagram and procedure, follow the below tips.
- First of all wire the CB Circuit Breaker but do not switch On.
- Then Wire push button wiring O/L relay and MC coil, which we can called small wiring.
- Then wire the overload relay with MC.
- Then Do connection between CB and MC.
- Then do motor supply connection with Overload relay.
- Then connect the earth led wire to the motor body.
In overload relay we have to option which NC and NO. When the flow of electron is high ring- from it's value the NC points change its direction and make an open circuit or broke- the circuit. Which are shown in above image with 95-NC-96.
If you want to learn from symbol contactor wiring diagram then click here.
Message :The above is example diagram of contactor wiring with overload relay, and i hope that this diagram help newbie very mush. But this is only starting and IN SHA ALLAH we will make more best contactor wiring and more tutorials for you.
Stay tune.... and keep visiting......