A tutorial how to made a motor protection dol starter panel board for a 3-phase motor.

Hello my dear steemian friends

Assalamu Alaikum

I am @saifuddinmahmud from Bangladesh. I made an electrical panel board for a 3-phase motor today. I will share with my Steemit friends in the form of a diary. I am going to write my diarygame. I hope everyone will like my post.

Edited by Canva

We need a panel board for a 3 phase fan. So I am making a panel board for it. If you run the motor through this panel board, there is less chance of the motor being damaged. You can avoid accidents caused by excess electricity.

I need some of important things that are-

1. 3 pole MCB
2. 2 pole MCB
3. Magnetic Contactor
4. Push button switch
5. Indicator lamp
6. Panel board

Step-01

I will first install 2 circuit breakers and a contactor inside the panel. I will install it close together so that it is convenient for me to make connections. I first installed the 2-phase breaker, then the 3-phase breaker, then the contactor.

Step-02

I installed the indicator lamp and push button switches on the door of the panel board. I will install them on the door so that it is convenient to operate. The push part will be outside and the connecting part will be inside.

Step-03

I connected a phase and neutral to the input line of the 2-phase breaker. I took out 1 phase wire from the output. I will connect all the instruments to this line from this phase wire.

Step-04

I will connect the phase wire to terminal 1 of the button's NC auxiliary. I will connect a wire from terminal 2 to terminal 4 of the green button's NO auxiliary.

Step-05

I will connect another wire from terminal number 4 and attach it to terminal number 14 of the magnetic contactor.

Step-06

I will take a yellow wire from terminal 3 of the green button and connect it to terminal A1 of the contactor, which will act as the phase line.

Step-07

Now I will take a wire from A1 of the contactor and connect it to the 13th NO terminal. I will take a wire from the 14th NO terminal and connect it to the 22nd NC terminal.

Step-08

I will take a wire from terminal 21 and connect it to the X1 terminal of the indicator lamp of the red button (off button). I will take another a wire from terminal 13 of the contactor and connect it to the X1 terminal of the green button (on button).

Step-09

Now, to connect the indicator lamps, I will take 3 wires from the 3 outputs of the 3-phase breaker and connect them to the X1 terminals of the 3 indicator lamps.

Step-10

The phase connections to each contactor push button and indicator lamp are complete. Now I will make the neutral connection. I will take a black wire from the output of the 2-phase breaker as the neutral and connect it to the A2 terminal of the contactor.

Step-11

I will connect all the indicators and push button indicators to the X2 terminal of the contactor. I will make a neutral connection from one indicator to another in the form of a loop. This completes the connection of all my devices.

Step-12

I will connect 3 wires of red, yellow, and blue from the output of the 3-phase breaker to the output terminal of the contactor. By this the contactor gets the 3 phase line.

Step-13

Now I will connect the power cable. I connected the 3-phase power to the input line of the 3-phase breaker. Then I connected the motor to the 3-phase line from the output of the contactor. In this way, I completed my entire circuit and connection.

Step-14

My work is complete. Now I will connect the electricity. After connecting, I turned on the fan. The indicator lamps of the 3-phase line lit up. Along with this, the indicator lamps of the pushbutton lit up. The fan is running.

Thanks to everyone who read my post.

Allah Hafej