Hi guys, does anyone have any connection diagram to a sensitive three-phase motor with emergency stop, I bought a montero contactor and two auxiliaries [img] https://adjuntos.yoreparo.com/imagen_post/0004/64/d11cada50c2f58b0512e5263e4a5e0dbe90b20b9.jpeg [/ im

Hello A sensitive saw (or other sensitive machine tool) due to its operational characteristics can be turned on with a three-phase rotary toggle switch. It makes no sense to arm a command with contactors and keypads. In the case of wanting an emergency stop, you do not necessarily need it to be on time for the machine, since it is more useful for it to be the tension of the sector involved in the accident. I tell you my experience at that point. The owner of a medium-sized metallurgical factory called me because I wanted three emergency stops that cut the tension in their machines with a fist bump located in strategic places easily accessible from these three sectors. The conditions: something simple and cheap. My solution was to place a PVC box of 7 cm x 7 cm x 5 cm in an accessible column (or wall) where I placed a fist bump without retention (large red button), I carried a phase of the feeding circuit of the machine (not lighting) and the grounding wire, inside the box I connected the phase to the push button and from this to a common resistance of 3000Ω (I think) of a couple of watts inside a connected glass spagetti at its other end to the grounding wire; The operation is simple, when pressing or hitting the stop button the phase is grounded through the 3k resistor and the differential circuit breaker jumps. This stop is done to verify safety when the last shift ends each week. [B] So with two pesos I made the machine stop. [/B] Today, if I did that job, I would place a 5 m mignon common lamp instead of the resistor and cut the pvc box and make it a window to see the light (if the lamp is on, it indicates circuit breaker failure differential and requires cutting of the board) I hope someone serves, if there is any doubt I add information. This system operates the circuit breaker where the live circuit has been taken.