Wiring Diagram for 3-Phase Contactor with Two Switches - Ahmed Hassan

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Ahmed Hassan requested a wiring diagram for a 3-phase contactor with two switches for starting and stopping the device, emphasizing the need for the contactor to stop when electricity is lost. Forum members provided assistance, including a useful link and diagram. The discussion shifted to the specific terminal numbers 21 and 22 on the contactor, with clarification that these typically indicate Normally Closed (NC) and Normally Open (NO) configurations. Ahmed later identified that the Moeller contactor's terminals 21 and 22 are NC, while 13 and 14 are NO. The conversation concluded with a suggestion for future self-research before posting questions.
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Hi everybody

I am new here but I hope that you help me.

I need wiring diagram for 3-phase contactor with two switches one for start (give the contactor the signal) and the other for stop.

when the electricity went off , the contactor should stop working

it's too simple not complicated

Thanks

Best Regards
Ahmed Hassan
 
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please refer to attached diagram.
 

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Ohhh

thanks for Don and m.s.j

it's really helped me

Thanks
 
What is case of the two terminals 21 and 22 in the contactor ?
 
We don't have any idea because we don't know which contactor you have. What makes you think all contactors have the same terminal numbers?
 
NO
I know that's every contactor has it's only terminal numbers but...

If there is 21 and 22 number in contactor , what is the situation for?

No (Normally Open)
Nc (normally Closed)

Thanks
 
I have no way of knowing. What is the brand and model number of the contactor?
 
Thanks

I'm looking in moeller contactor and found the thing I need.

I found that the connection terminal for (21 and 22) normally Closed and the terminals (13 and 14) Normally Open if the contactor not work

Thanks again
 
  • #10
Just a sugestion, but perhaps in the future you could at least make a token effort to find the information yourself before stating a thread here. Obviously the information was available to you; this could have been finished a week ago.
 
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