Subject: Current limiting
Date: Thu, 18 Jan 1996 19:31:05 -0500
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In a message dated 96-01-17 23:23:04 EST, tesla-at-grendel.objinc-dot-com writes:
>Subject: Re: Current limiting?
>> An inductive load (ballast) is used to limit the
>> current without limiting the voltage - uising inductive reactance not
>> resistance. This controlls the current into and out of the transformer
>> without reducing the voltage - there actually will be a small voltage
>> drop across the ballast due to the resistance of the wire.
>I think that an inductor does induce a voltage drop that is proportional
>to the impedence times the current, in addition to and directly
>analogous to the resistive voltage drop, V=I*R.
>Steven Roys (sroys-at-radiology.ab.umd.edu)
True. In this case, with the welder wide open (at what I think is about
15mh) the inductive reactance would be 5 or 6 ohms - which is probably why I
need to put 6000 watts of oven elements in parallel with it to get my primary
current up to 40 amps.