Re: [TCML] Variac ballancing chokes re-visited

["Jon Danniken" <danniken@xxxxx>]

MICHAEL HARDY wrote:
> I came across this web page after using goggle.
>
> http://bellsouthpwp.net/b/u/bunnykiller/parallel.html
>
> It refers to my "A)" scenario as I suspected  was presented by
> "bunnykiller".  "Connection 3" (on the right side of the page) seems
> like the best method because each 'choke' has a dedicated winding in
> correspondence to each variac.  Therefore a 30A variac passes thru a
> #8 wire winding (well within the current capacity of the wire). Can
> someone clarify the winding direction in relation to the H1,H2
> winding and H3,H4 winding. I see it as if it were one center tapped
> winding H2 and H3 would be tied together and be the center tap, is
> this correct?The other scenario I presented used 2 chokes to feed a
> 3rd choke, which would see 90A max thru #8 wire. Probably a bit too
> much stress.

There is also another method, by which you can use two chokes to connect 
three variacs in parallel, as demonstrated by diagram "A" in the following 
image:

http://i.imgur.com/kJKPx.gif

I used that topology on my power cabinet, and used two small microwave 
transformers, stripped of their original windings and rewound, as the cores.

Jon

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