Re: [CAD_CAM_EDM_DRO] capacitor

This point has been well taken, on the size of the variac,
this is one of my smaller ones. I have a motor-controlled three PH unit
that delivers 70A per coil. Also have several from 5-10-20A units. We are
furtunate enough
to have good mill. surplus here, which is where you find these monsters.
They would still work with a good 1-1 isolation trans. Enough voltage for a
plas-cut supply, etc.

----- Original Message -----
From: "Paul R. Hvidston" <paul_hvidston@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, March 20, 2002 9:18 AM
Subject: Re: [CAD_CAM_EDM_DRO] capacitor


> That's one heck of a Variac. I've got a 10 Amp 250 Volt Variac and it's
> huge! I think you're off somewhere. AND MORE IMPORTANTLY, Variacs are not
> isolated from the mains. You need a true transformer not an
autotransformer
> like a Variac.
>
> You can put a Variac ahead of a power transformer to vary the output of
the
> transformer:
>
> 120AC -> line fuse -> Variac -> Transformer -> rectifier -> filter cap ->
> fuse -> Gecko ;-)
>
> Regards,
>
> Paul R. Hvidston, N6MGN
> ACKSYS Engineering
> Upland, CA
> ----- Original Message -----
> From: "Mike Snodgrass" <snarf@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Tuesday, March 19, 2002 7:08 AM
> Subject: [CAD_CAM_EDM_DRO] capacitor
>
>
> > Hello, I have a variac rated at 60A, and plan to rectify and
> > filter the current at my driver enclosure, to power my geckos. What
value
> of cap would I need? I realize it would
> > have to be rated at higher than required voltage. Also could I use a AC
> cap ahead of the rectifier?
> > Thanks
>
>
>
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