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Re: new power transformer




From: Esondrmn-at-aol-dot-com

In a message dated 98-08-26 22:18:58 EDT, you write:

<< 
 Potential transformers are not internally current limited, so you will need
 external ballast.  Still, you could set up a pretty small system.  I
 recently tried using a PT with a medium sized coil and I love it.  I am
 planning on getting one of those small 110v arc welders as a current
 limiter, but for the time being I have been using a shorted MOT as the
 limiter and it has worked wonderfully.  I think a PT and mini welder could
 make a fantastic compact power supply.  At 3kW you may be above most PT's
 nominal current ratings though.  PTs are very robust, but I do not know
 what their really long term overload characteristics are like (someone
 else?).  How long are your marathon runs?
 
 Zap!
 
 
 Charles Brush >>

As opposed to welders, you can also use large variacs as the ballast for
potential and pole transformers.  Bill Wysock suggested that I replace my
welder with a variac when I was having problems with my system.  I was lucky
to find a 5,000 watt light dimmer (Luxtrol D-5000B rated at 40 amps) and it
works great.  I use this with 3.2 ohms of resistance in series.  This is good,
now I can leave the welder at work where it belongs.

Ed Sonderman

Ed Sonderman