Bit of help ASAP.....Please!!

[Dickylad]

Hi,
looking at a blown up photo of the contactor it appears to be a 24V AC coil (TeSys K CONTACTOR 4kW 9A 24VAC) so to test contactor wire from 24V (transformer) to A1 (contactor) and 0V (transformer) to A2 (contactor) and it should pull in. If you have wired it in the past so 600V went across the coil it may have burnt out. Hope this helps,
Regards,
Dickylad.

 

[hyperliteliam]

On the side of the contactor it does say 600v max. Can't see where it states the coil rating though, as it has 24v on the front i'm assuming its that. Dickylad tried that and still no joy, so guessing its kaput!

 

[Dickylad]

Test the resistance of the coil going across A1 and A2 on the contactor, this will show if it is burnt out or not.

 

[ringer]

Test the resistance of the coil going across A1 and A2 on the contactor, this will show if it is burnt out or not.

Agreed - if you've put 600V, or even 230V, across that coil you've likely burnt it out.

 

[robswainelect]

Yes, this pedal puts a supply onto the coil of the contactor, thus pulling it in.

 

[Bul76]

Hi,

Measure the resistance of the coil. Check the resistance of the Foot pedal switch. It does sound like the Coil is kaput. You really need to verify the correct coil operating voltage. Ohm out the wiring when you replace the contactor. What ever the operating voltage of the coil requires, put that to terminal 3 on the foot pedal switch, the other side of the switch terminal 4 on the foot pedal to A1 of the contactor, A2 to neutral. The contactor should pull in then. This is assuming the foot pedal is a NO switch, which it should be.
When you depress the Contactor you should get contact between both sides of the contactor, L1 to T2 etc..

 

[hyperliteliam]

Thanks for all your replys, gonna pick up a contactor tomorrow. Let you know how it goes....

 

[Dickylad]

Hyperliteliam,
thought I would draw up how I think your circuit should look. I have used red and black for the 600V so you dont confuse them with the other blue and browns running horizontally. It may or may not be of any use, I haven't shown fuses in the 24V or 600V circuits,

Regards,

Dickylad

 

[davelerave]

i'm guessing the secondary will be isolated here

what fusing is needed on the secondary?- a fuse on the 24v and 600v taps probably

 

[hyperliteliam]

Thanks for the drawing dickylad, really appreciate it. Gotta be honest and say this is my first real go at 'panel building' if you like, so bit green really with it all.
Basically the father in law had to buy this as a kit because Kellys (turkey people) weren't allowed to sell it complete as its over 150 volts apparently. Their 'electrician' designed this as their previous stunner was not as safe as this design apparently, so can't see why these appropriate fuses haven't been included.
So to make this all ok what fuses are required as i'll pick these up with the contactor..

Thanks again guys

 

[hyperliteliam]

Evening guys.

Got this working the other day. 600v present at the stunner probe commando socket when foot-pedal pressed.
But got a slight problem; i think...?
As i've stated, when i check voltage at the commando socket i've got 600v and the contactor pulls in fine, but when i plug in the probe to the socket then press the foot-pedal the contactor rapidly pulls in and out, in and out till i press the button on the probe.
When the button on the probe is pressed the contactor stays pulled in...

Is really puzzling, anyone shed some light on this for me please...

Cheers

 

[cantabrian9]

is this person for real,!!! if they have forgot how to wire up a contactor AFTER only 3 years something is wrong!!!

 

[hyperliteliam]

Yeah I am for real mate. Is that alright.

Looks like I ALSO forgot that i should have contacted you about the problem I've had in the first place, sure you would have sorted it well quick.

Do one mate, this ain't what this forums about. Seems you'll be more suited to the screwfix forum after the above constructive reply....

 

[Dickylad]

Hi hyperliteliam,
if the contactor is bouncing in and out it must be an issue with what is controlling it i.e. the foot switch. Are you getting a clean 24V AC onto the A1 and A2 of the contactor? Don't worry about other people having a go we are all at different levels, I am sure there are lots of things you can do better than me, anyway check for a good connection on your pedal switch, hope this helps,

Regards,

Dickylad.

 

[Dickylad]

Something else I have thought about, if when you have the probe connected the contactor bounces in and out, it may be a fault or the size of the probe is too big for your transformer. This may occur due to the probe pulling the voltage down which because of the shared transformer the 24V AC for the contactor could be pulled down below the value which will hold the contactor in so it drops out, when it drops out the voltage recovers and then the contactor pulls in again, this could result in what you describe. Have you fused the 600V and 24V circuits?
Regards,
Dickylad.