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, in order to be able to bring the control buttons to any place you want. The use of automata limits this zone, since it is necessary to pass power wires through the automaton, and increasing their length is expensive and not always convenient.
Another thing is the starter. Power lines pass along the smallest path, and control of three thin wires (usually in one cable) go to the place of convenient location of buttons.
Secondly, in addition to the manual control buttons, there may be automatic devices (light sensor, temperature and pressure) that can themselves control the operation of the load.
In addition to the above factors, another advantage of the starter is the switching of a sufficiently powerful current.
Therefore, knowing how to connect the control buttons to the starter is simply necessary. Yes, on the Internet you can find a lot of electrical concepts, but how to connect the starter to a “live” one with a circuit is not always clear.Even experienced electricians with great experience, without doing this for a long time, may not immediately recall the connection sequence. And what to say then about a person who does not have a special education.
Further, the article will describe the step-by-step connection of the control wires to the starter with explanatory photographs.
So, what is needed for this work:
1) the block with two buttons, - the power button, - freely open contacts, and the shutdown button - freely closed contacts;
2) starter with a 220 volt coil, and with one additional free open contact;
3) cable or wire of a small cross-section in three wires. The cable length is selected depending on where the starter will be, and where the control unit.
connect control buttons to the starter

It does not mention the power cable and the cable or the cable that goes to the load - this is a matter of course.
Now the sequence of work:
1) connect the load wires to the starter. If it is three-phase, then we make one wire for each contact. Well, in the case of a single-phase load, you can connect these three contacts with jumpers and connect a phase load wire to it. This will increase the reliability of the starter, since the current will flow through the three contact lines;
connect control buttons to the starter

2) from the bottom contact of the red button (disconnection), 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 the 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) we connect the wire from the terminal where the jumper has been planted 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 turned off and the contacts are not connected;
5) from the terminal of the same button, connect the wire to the additional contacts on the other side. In fact, now the “ON” button duplicates these additional contacts;
6) so that the buttons can supply control voltage to the starter coil, with one end connect the wire to any phase, and the second to the terminal of additional contacts;
connect control buttons to the starter

connect control buttons to the starter

7) connect the “ZERO” to the second output of the starter coil;
It remains to connect the power cable, - in the photo it is in the corrugation, and everything is ready to turn 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 chain to the starter coil.So, as at the other end of the coil will be zero, the electromagnet will be pulled in and the starter's contacts will close, including additional ones. Since these contacts will be closed by releasing the button, the circuit will not break and the starter will work. Further, by pressing the “STOP” button, the control phase is cut off and the coil is discarded. Accordingly, all contacts are opened.
That's all. Try and succeed.

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