3 phase motor cuts out when button isn't held

[Aaronj46]

It should run continuously without being held in. Any suggestions?

 

[telectrix]

yep. find the fault. could be contactor coil or several other possibilities.

 

[Spoon]

Are you saying that you have a starter and its not latching, so you have to keep your finger on the start button?
If so then do as Tel says and find the fault. You know the motor works so there is something wrong with the latching.

 

[Darkwood]

Did it work before?
Do you understand basic motor control circuits?

This can be many things as already stated your stop button priority maybe wired wrong and a stop command is active like a limit switch etc .... if its wired wrong its possible to over-ride the stop command by holding the start button in .

Has the motor overload tripped - does resetting it cure the problem? If so you controls are incorrectly wired and you also need to find out why motor O/L has tripped in the first place.

Caution just asking this question gives indication this is not your comfort one and I advice you leave well alone and get someone in who is competent as your lack of experience in this area could endanger others or damage equipment if you try to resolve the issue without understanding both the circuit and risk assessment.

 

[Knobhead]

Aaron, our guess is as good as yours.

 

[plugsandsparks]

It should run continuously without being held in. Any suggestions?

Either hold it in or wedge a tool against the button. All I can suggest really, although proper motor starters are readily available and do have this ability built in. cheers P&S

 

[Hawk81]

It should run continuously without being held in. Any suggestions?

This is a very poorly worded question. How can you expect us to help with this is all you give? We need more info on the exact set up and what you have already tested to try to find the fault.

 

[Spoon]

Don't you just love these posts.... I'm soooo happy the OP got back to us to give us more info....

 

[mechelec]

Should this have been in the DIY section.

 

[trev]

Good grief!
Here's a suggestion for you. Go and find an electrician who is competent to carry out this job.

 

[joel89]

No retaining wire from the stop button to the contactor?

 

[trev]

Put an elastic band round where the start button is.
I'm sure that'll be compliant.

 

[moospark]

Put an elastic band round where the start button is.
I'm sure that'll be compliant.

Gaffa will hold betterer?

 

[trev]

Whe's Gaffa?

 

[moospark]

Blowk wiv the orange hi-viz. Generally a failed chippie.