Re: [MV] Electric current ? (Ohms Law)

From: J. Forster (jfor@quik.com)
Date: Sun Jul 18 2004 - 18:01:28 PDT


rertman@ix.netcom.com wrote:

> In AC power circuits where the frequency is
> low (60 Hz) the impedance is essentially the same as the DC resistance.
>
> Dick
>

Absolute not true. An inductor can have a DC resistance of an ohm or two and a reactance of
tens or hundreds of an ohm at 60 or 400 Hz. An inductor with a reactance of Z ohms at 60
Hz will have a reactance of approximately 400/60 x Z ohms at 400 Hz.. Also, reactance can
be either inductive or capacitive. Motors are much more complicated because their
reactance is a function of speed.

-John



This archive was generated by hypermail 2.1.4 : Sat May 07 2005 - 20:33:53 PDT