Re: [TCML] Variac Overrating (1256's and others)

[jimlux <jimlux@xxxxxxxxxxxxx>]

brianb@xxxxxxxxxx wrote:
> Jim/all,
>
> Attached is a link to the official word on how much you can push a variac (direct from the 
> manafacturer).
>  
> http://www.brianb.org/Download%20Files/staco_Overload_graph.jpg
>
> As you can see they will easily do 250% for a 5-min run with a 30-min cool-down between runs (this 
> assumes the brushes and contact surfaces are in good shape)...
>  
> Hope this helps.
> Regards,
>  
> Brian B. (back to lurking)

And, if you were to provide forced air cooling, or immerse the thing in 
oil, you could probably do more. (not sure how well the wiper brushes 
work under oil, but I'll bet they'd work ok)
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