Connecting Three-Phase Motor to Chainsaw with 16A Schneider Contactor, Mushroom Switch & 4 Core

I warmly welcome,
I was given the task of connecting a 3-phase motor to a chainsaw in a workshop (I am an electronic engineer at rest ). The installation is 4 core, 3 phase and one earth / neutral. I have a 16A schneider contactor, an old type switch (such a twisted switch), a safety mushroom and a motor. Please tell me how to connect a single-phase plug to a contactor (inputs on it L1, L2, L3, NO, A), to disconnect the contactor with the plug? My concept was (and I do not know a lot about the contactor) to pass the phase to the L inputs, neutral through the mushroom to the NO input (from what I understand it is normally open, i.e. it must be somehow powered - here I have a problem) and go further to switch.



I don't know if I am thinking right, so please be understanding.

Best wishes

You break the contactor coil circuit with a mushroom, which causes only the motor.

so I run the cable through A1 to the mushroom and from the mushroom to A2, right?

This is not how you will short circuit.
Power to A1 goes through the mushroom and that's it, and A2 goes to power.

@cr! S What "Grzybek"? Toruński? It's called the "safety button". You connect it in series with its NC contacts to the contactor coil. What you wrote is a parallel connection, completely pointless. Besides, this diagram is also nonsensical as you only use a contactor for emergency disconnection. And now someone will leave the three-phase switch in the "on" position, and another will unlock the pressed "mushroom." The "start" and "stop" buttons are used, an overcurrent thermal relay, matched to the motor power, and the auxiliary contacts of the contactor provide its self-support. Connection diagrams everywhere, also on the Forum.

Moderated By Krzysztof Reszka:

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Buddy, the button cannot be built in this configuration. It poses a danger to the user. Hold off with such advisors.

My colleague, the motor must have overload and short-circuit protection. The off button must effectively turn off the power to the motor.
No switch on button. Here is a diagram.

I would modify this scheme - depending on the design of the machine - instead of separate EMERGENCY STOP and STOP buttons, use one with a double function, you can use an EMERGENCY STOP button with or without a lock.

mychaj wrote:

I would modify this scheme - depending on the design of the machine - instead of separate EMERGENCY STOP and STOP buttons, use one with a double function, you can use an EMERGENCY STOP button with or without a lock.

Only it does not comply with both the machinery directive and regulations.
STOP of the machine during normal operation is different than emergency STOP.

And the motor switch itself in the housing with the start-stop buttons?
Hardly any machine available in supermarkets or in other locations has a strictly emergency switch.
Sometimes there is even no motor protection, only a ŁK 0-1 switch.
Machine safety is not only the proverbial "mushroom" ...

Of course, if you were doing your own home, you could forgo the extra alloy. But for the public utility it should be equipped like this. Good devices use a compact solution, for example.