wrote in message
...
A friend of mine here on Whidbey Island has a welding business. It's
pretty new, only a few years now. Anyway, he called me yesterday
with
an electrical problem. Puget Sound Energy (PSE) has had complaints
from neighbors about voltage spikes or drops, my friend wasn't clear
on this, but they showed him a graph which I have yet to see. The
solution PSE is proposing is a new xmfr at the pole. PSE told my
friend the problem is because of the hard starting welder. The
welder
is an older xmfr type machine with lots of copper. At full load it
is
rated at 11 kw, which is about 46 amps. But I don't know what the
current spkies to when he first steps on the pedal. The machine is
now
wired for single phase but can be wired for three phase. What he
wants
to know is if he ran the welder from a Rotary Phase Converter would
the current spikes and voltage drops be less. I don't know. I also
don't know if there is a way besides my friend paying thousands for
PSE to install a new xmfr on the pole for this situation to be
ameliorated. He can't afford at this time for a new welder with a
softer start setting. Besides, the hard fast start means his
employee
can make more welds. Any help would be greatly appreciated.
Thanks,
Eric

You could look into turning it on with a Zero Crossing Relay.
http://www.crydom.com/en/Tech/Newsle...ng%20types.pdf
Can you check the voltage, current and power fector with a scope?

-jsw