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 Post subject: 110v transformers
PostPosted: Fri Oct 06, 2017 4:54 pm 
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pluged my transformer in this morning to start graft. nowt was plugged into it at the time.... it went pop pop pop flash flash smokey smokey :mrgreen:

stupid thing.

so i took off the lid. inside there was shed loads of smoke. the inside of the lid is burnt black directly above the reset switch.

me and the sparky i know both had a look. the power lead comes in. the live goes to that breaker reset switch thing... and then goes into the resiny bit where i assume the coils will be.

the lead coming out of the switch and to the coils has turned kinda to dust at that point...

i assume its done this because of a fault in the windings? and that the transformer is goosed beyond repair?

its a 3 kva transformer and i often run router/mitre saw and extractors through it. and the other week did 2 days of work where it was grafting almost constantly with my sander and extractor set up on it.. could i have cooked it then?

yesterday when i turned it on it kinda popped a little bit but i thought nowt much of it. this morning was canny spectacular though haha :lol: :lol: :lol:


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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 5:39 pm 
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Sounds like it's gone to transformer heaven via the winding path.
Probably got hot and a winding has shorted.


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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 5:56 pm 
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Dave54 wrote:
Sounds like it's gone to transformer heaven via the winding path.
Probably got hot and a winding has shorted.

Not to me....

Sounds like the contacts on the thermal cut-out have just gone pop..... you still get a switch-on surge into the primary even without anything connected on the secondary.

Short out the thermal cut-out and connect power direct to the transformer (via proper fused plug of course) and see if it works. I suspect it will.

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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 6:04 pm 
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kellys_eye wrote:
Dave54 wrote:
Sounds like it's gone to transformer heaven via the winding path.
Probably got hot and a winding has shorted.

Not to me....

Sounds like the contacts on the thermal cut-out have just gone pop..... you still get a switch-on surge into the primary even without anything connected on the secondary.

Short out the thermal cut-out and connect power direct to the transformer (via proper fused plug of course) and see if it works. I suspect it will.


Could well be. Hope I'm wrong and you're right! :lol:


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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 6:14 pm 
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Mine got abused one time, (think I told the story on here a while back) basically, and without my knowledge, it was running a large portion of a large site cos everyone was piggybacking off it.

When I got to it, it was almost too hot to pick the damned thing up - it's still going ten years later, it must be hard to kill a good one.

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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 8:01 pm 
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kellys_eye wrote:
Dave54 wrote:
Sounds like it's gone to transformer heaven via the winding path.
Probably got hot and a winding has shorted.

Not to me....

Sounds like the contacts on the thermal cut-out have just gone pop..... you still get a switch-on surge into the primary even without anything connected on the secondary.

Short out the thermal cut-out and connect power direct to the transformer (via proper fused plug of course) and see if it works. I suspect it will.



how do i do that? ill go and grab it and take the lid off it and get a pic.... dunno how to hoy em on here like and photobucket is ruuuubish. unless i can put em on by my phone like


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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 8:03 pm 
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I have a link in my signature on how to add pics. :wink:

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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 8:24 pm 
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ayjay wrote:
Mine got abused one time, (think I told the story on here a while back) basically, and without my knowledge, it was running a large portion of a large site cos everyone was piggybacking off it.

When I got to it, it was almost too hot to pick the damned thing up - it's still going ten years later, it must be hard to kill a good one.


I’ve got one still running like that....it’s a good 25 years old,weighs a tonne compared to modern 110v 3kw tranny’s and you could fry an egg on it when it’s got 67 things coming off it :lol:
I think it’s immortal!!


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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 9:09 pm 
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you would have got far more veiwings with "large tranny goes pop " :lol: :huray: :huray:

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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 9:37 pm 
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big-all wrote:
you would have got far more veiwings with "large tranny goes pop " :lol: :huray: :huray:

and I bet you clear your internet history every night....... :lol:

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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 10:05 pm 
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kellys_eye wrote:
big-all wrote:
you would have got far more veiwings with "large tranny goes pop " :lol: :huray: :huray:

and I bet you clear your internet history every night....... :lol:

naaa never bother as i have no one sharing my lap top :lol: :huray:

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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 10:31 pm 
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ahhh dunno how to resize em on mac :cb

pics taken on a iphone too


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 Post subject: Re: 110v transformers
PostPosted: Fri Oct 06, 2017 10:38 pm 
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this is the tranny that i dropped ages ago and it cracked the corner off it and loads of shady looking white powder fell out of it. i siliconed up the hole like to stop any more falling out :huray: :huray:


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 Post subject: Re: 110v transformers
PostPosted: Sat Oct 07, 2017 1:58 pm 
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pure bodge job this tranny like.

cut the cable back and hoyed a one of those 30 amp connectors on it. jobs a goodun. so now it has no reset switch like. the live just goes straight into the coils.

its happily buzzing away now :lol:


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 Post subject: Re: 110v transformers
PostPosted: Sat Oct 07, 2017 2:19 pm 
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fin wrote:
ahhh dunno how to resize em on mac :cb

pics taken on a iphone too


I use image resizer app for posting photos on here fin. You can’t resize apple device photos otherwise.


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