RE: Balancing chokes

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Sparktron01@xxxxxxxxxxx 

Eventually, eventually...    ;^D

Upgrading an old controller with appropriate interlocks, variac stack
Power meter (Siemens 9200 series), etc., etc.  Not my system, I'm just IGOR.

Regards
Dave Sharpe, TCBOR,HEAS
Chesterfield, VA USA
 -------------- Original message ----------------------
From: "Tesla list" <tesla@xxxxxxxxxx>
> Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
>
> If this is being used for a coil, I want to see it! :-)
>
> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Tuesday, November 28, 2006 5:43 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: Balancing chokes
>
> Original poster: Sparktron01@xxxxxxxxxxx
>
> Chip, all
>
> I'm late entering this thread.  I'm helping a fellow experimenter
> build a very large ~25kVA Variac stack
> using 3-1256D's (28A, 240V).  The proper connection diagram for up to
> (8) variacs in parallel using
> balancing chokes is shown in attached URL.
>
> http://www.superiorelectric.com/PDF/Z50pwst.pdf
>
> See page 3 of 8, connection 3 (P/N MB1256D-3P, 0-240VAC, 28kVA, 84A
> @100% DC).  He has a
>    massive Stack of 2 x 8 motorized variacs capable of well over
> 100kVA nameplate, will use
>    equalizing chokes from that assembly.  Motor with traverse 0-100%
> in 30 secs.  Notice the balancing
> chokes are wired on secondary side in series, reflected impedance
> forces current balance on
> entire assembly.  Keep it simple, and smile doing it... :^)
>
> Also on a large Variac stack like this, use a series current limiting
> resistor and contactor ("step start")
> to limit inrush current (could approach 500A on a system like this).
>
> Regards
> Dave Sharpe, TCBOR/HEAS
> Chesterfield, VA. USA
>
>
>    -------------- Original message ----------------------
> From: "Tesla list" <tesla@xxxxxxxxxx>
>   > Original poster: <chipford@xxxxxxxxxxxx>
>   >
>   > Could I wrap say 10 or 12 turns of #8 or #10 wire (2 strands) on (3)
>   > of these and use them as balancing chokes for my (3) gang variac? Or
>   > would a toriodal shape be more appropriate? Thanks for any and all
> input...Chip
>   >
>   > http://hot-streamer.com/temp/siiron.jpg
>   >
>   >
>
>