[TCML] How to use an arc welder as a ballast?
bunnikillr at cox.net
Sun May 4 20:08:31 MDT 2008
First and foremost you must consider the size and capacity of the welder
to be used "as a ballast". second thing to consider is the type of wire
used in the welder itself, aluminum wiring wont last too long, copper
wiring on the welders transformer primary will have a better life span.
as for the wiring technique, the 2(3) leads that power the welder will
be the ones used to "ballast" the piggie. General concensus calls for
wiring the welder as such....
the ground lead(green)of the welder goes to ground of the receptical on
the source, the black lead ( hot wire from the source/recepticle)
attaches to the black lead of the welder, the red ( most commonly used
in 240VAC ,,, the other half of the dual 120vac) of the welder attaches
to one of the inputs of the piggie, the other input of the piggie
attaches to the red output of the source/recepticle. Basically the
welder primary is in series with the input to the piggie.
short out the secondary side of the welder ( in other words stick a
short length of welding lead between the welders ground and welding lead
start with the welder set on minimal current setting and slowly work
your way up to higher current levels via the current control on the
welder to increase current thru the piggie. WATCH for glowing inside the
welder, smoke, or rather obnoxious humming noises, if it begins to throw
sparks, shut it down and begin looking for another welder or a really
big transformer core to wind your own ballast.
IF you have the welders original paperwork, see what the DUTY CYCLE
is... this is a rating as to how long the welder can remain on for a
maximim amount of time before it needs a cool down period. When a welder
is used as a ballast, the welder "thinks" it is in its welding status
since the welding leads are shorted ( in welding mode)
If you can, find a scrap yard or such that will have a 10 - 20 KVA rated
step down transformer ( 480 to 240) you will have a great core to rewind
for a ballast. Usually they are a bit heavy but can handle the
requirements of ballasting a piggie...
marcus masencup wrote:
>I am stepping up to pole pigs after years of using NST's. I have read
>everything I can find online and for me it seems that an arc welder is the
>easiest way to add the current limiting and ballast I need to run the 10kva
>pole pig I have. What I can't find is how I need to wire the arc welder up
>with the pole pig? Any help on how to wire this would be great, thanks!
>Tesla mailing list
>Tesla at www.pupman.com
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