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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