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Discuss how to wire a start button using a 3 phase contactor in the Industrial Electrician Talk area at ElectriciansForums.net

Megawatt

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Hi Guys, any help is really appreciated! Want to wire a start button while using a three phase contactor. Contactor has A1 and A2 for coil and is 220 volts (contactor ).
I tried wiring A1 to 1 on contact block and A2 to 2 on contact block of start push button. No power to machine. Does the coil need a jumper from L1 to energize coil? Have 220 volts across L1, L2, and L3. No power going out when pushing the push button.
Freddiemac here’s your wiring diagram
[automerge]1599073875[/automerge]
Hi Guys, any help is really appreciated! Want to wire a start button while using a three phase contactor. Contactor has A1 and A2 for coil and is 220 volts (contactor ).
I tried wiring A1 to 1 on contact block and A2 to 2 on contact block of start push button. No power to machine. Does the coil need a jumper from L1 to energize coil? Have 220 volts across L1, L2, and L3. No power going out when pushing the push button.
I forgot to add the overloads
 

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Why done you just buy a 3 phase stop/start enclosure. If this is going into an a factory (and that is why its in the Industrial section of the forum) then it needs to be done property. If anyone gets hurt using the motor then your head is on the line.

Hi Guys, any help is really appreciated! Want to wire a start button while using a three phase contactor. Contactor has A1 and A2 for coil and is 220 volts (contactor ).
I tried wiring A1 to 1 on contact block and A2 to 2 on contact block of start push button. No power to machine. Does the coil need a jumper from L1 to energize coil? Have 220 volts across L1, L2, and L3. No power going out when pushing the push button.
Hi, you will need to wire from L2 to A2
Then you will need to wire from L1 to ne side of the overload of the motor.
Then wire from the other side of the overload to one side the start button normally open.
Wire from the other side of the start button to one side of a stop button normally closed.

Wire from the other side of the stop button to the coil a1
You will also need to run wires from across the start button to the normally open contacts on the contactor to keep it running.
From a safety aspect you may well need to feed the start button from a safety relay (pilz or similar)!!!
 

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