Re: Scoping I-V phase shift through L
At 10:59 PM 11/12/1999 -0700, you wrote:
>Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
> This is actually a bit complex...
Well, complexity IS better than boredom :-)
> The Tesla coil measurements are done (in my case) with electrically
>isolated fiber-optic current probes. Thus they can be used at the top
>terminal where the voltage are like 500000 volts. The scope is
>electrically isolated by 30 feet of glass fiber so the scope is very safe.
>Two probes are used, one at the base of the secondary and on between the
>top of the secondary and the toroid. They are high bandwidth and phase
>correct so measuring current and phase is easy (one you have the probes
>;-). Details of this are at:
> However, if you want to see current and phase of a typical line powered AC
That is exactly what I am interested in. I have yet to kill a scope, but I
never use the neutral wire as a ground either, common earth ground seems to
work fine with un isolated utility power. I can measure the voltage and
wave form on the primary side of a inductor (transformer or current
limiting inductor) and I can measure the voltage wave form on the secondary
side (other side in the case of a series inductor), and that shows me the
phase shift of the voltage, but how do "see" the difference in phase of the
voltage AND current?