How to connect control buttons to the starter

To control the operation of the engine and other powerful consumers, a starter is required. Why is it needed? Firstly, so that you can display the control buttons anywhere you want. The use of automatic machines limits this area, since power wires need to be routed through the automatic machine, and increasing their length is both expensive and not always convenient.
The starter is another matter. The power lines take the shortest possible path, and control three thin wires (usually in one cable) go to the convenient location of the buttons.
Secondly, in addition to manual control buttons, there may be automatic devices (light, temperature and pressure sensor) that themselves can control the operation of the load.
In addition to the above factors, another advantage of the starter is the switching of a fairly powerful current.
Therefore, knowing how to connect control buttons to the starter is simply necessary. Yes, you can find a lot of electrical circuit diagrams on the Internet, but how to connect the starter “live” with a diagram is not always clear.Even experienced electricians with extensive experience, without doing this for a long time, may not immediately remember the connection sequence. What can we say then about a person who does not have a special education?
The rest of the article will describe the step-by-step connection of control wires to the starter with explanatory photographs.
So, what is needed for this job:
1) a block with two buttons - an on button, - freely open contacts, and a shutdown button - freely closed contacts;
2) a starter with a 220-volt coil and one additional free-open contact;
3) cable or wire of small cross-section with three cores. The cable length is selected depending on where the starter will be located and where the control unit will be.

connect control buttons to the starter


There is no mention of a cable or wire supplying and going to the load - this goes without saying.
Now the sequence of work:
1) connect the load wires to the starter. If it is three-phase, then we connect one wire to each contact. Well, in the case of a single-phase load, you can connect these three contacts with jumpers and connect the phase wire of the load to it. This will increase the reliability of the starter, since the current will flow through three contact lines;

connect control buttons to the starter


2) from the lower contact of the red button (shutdown), we lead the wire to the starter coil;

connect control buttons to the starter

connect control buttons to the starter

connect control buttons to the starter


3) connect the second contact of the red button with a jumper to the adjacent contact of the power button. Sometimes such jumpers are already provided by the button manufacturer;

connect control buttons to the starter


4) connect the wire from the terminal where the jumper was placed on the “ON” button and lead it to an additional normally open contact.

connect control buttons to the starter

connect control buttons to the starter


By the way, normally open is when the starter is disconnected and the contacts are not connected;
5) from the extreme terminal of the same button, connect the wire to additional contacts on the other side.In fact, now the “ON” button is duplicated by these additional contacts;
6) so that the buttons can supply control voltage to the starter coil, connect one end of the wire to any phase, and the other to the terminal of additional contacts;

connect control buttons to the starter

connect control buttons to the starter


7) connect “ZERO” to the second terminal of the starter coil;
All that remains is to connect the power cable - in the photo it is corrugated, and everything is ready to be turned on.

connect control buttons to the starter

connect control buttons to the starter

connect control buttons to the starter


How the scheme works.
When you press the “START” button, the phase will first pass through the closed contacts through the “STOP” button circuit to the starter coil. So, as soon as there is zero at the other end of the coil, the electromagnet will be retracted and the contactors of the starter will close, including additional ones. Since these contacts will be closed, releasing the button will not break the circuit and the starter will work. Next, pressing the “STOP” button, the control phase is interrupted and the coil is discarded. Accordingly, all contacts open.
That's all. Try it and everything will work out.
come back
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Comments (6)
  1. Apolonik
    #1 Apolonik Guests February 14, 2016 09:11
    0
    Good article! Useful for those who need it in their production process. I thank the author, I will print out the text and put it in the workshop as additional literature
  2. Karimov Ilgiz Ilyasovich
    #2 Karimov Ilgiz Ilyasovich Guests 29 March 2016 22:42
    0
    Thank you. I’ve been wanting to figure this out for so long without experimenting live. It’s a shame to ask electricians... because... they may say that you don’t know the basics, although by virtue of your profession you are obliged to know....
  3. Guest Alexander
    #3 Guest Alexander Guests 4 October 2018 13:32
    3
    Where did zero come from? Three wires come from the corrugation.
  4. Vasya
    #4 Vasya Guests 11 June 2019 19:50
    1
    How does the circuit work? By the way, where is the circuit?
  5. Guest Oleg
    #5 Guest Oleg Guests 8 August 2019 17:09
    2
    It wouldn’t hurt to provide a diagram, it will be easier to understand and check with your photos during assembly.