Re: power supplies from those 24v transformers

Hello,

IMO, you should be using 120, rather than 117... At least out west,
120 has been std. for many years. And as you say, the utilities are
pushing higher all the time. These machines will be used hopefully
for quite awhile, nad it seems a good idea to plan for this...

Hope this helps,

Ballendo


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Les Watts" <leswatts@a...>
wrote:

> Thanks, Jerry.
> The basic two transformer design can be made
> in 10a capacity increments by duplicating the
> transformer part and paralleling, with a shared
> higher capacity bridge rectifier and larger cap.
> Larger versions would benefit from an inrush device
> like a pair of Thermometrics NTC inrush current limiters
> as suggested by Mariss. They are in Digi-key and only
> a couple bucks or so each. He can elaborate later.
>
> Now if someone can measure the actual voltage ratio
> to see what is obtained with 117vac + 10% to make
> sure that it doesn't pop amps in those not uncommon
> high line voltage situations.
>
> Les
>
>
> Leslie Watts
> L M Watts Furniture
> Tiger, Georgia USA
> http://www.alltel.net/~leswatts/wattsfurniturewp.html
> engineering page:
> http://www.alltel.net/~leswatts/shop.html
> Surplus cnc for sale:
> http://www.alltel.net/~leswatts/forsale.html
> ----- Original Message -----
> From: <jerry@o...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Sunday, January 19, 2003 5:43 PM
> Subject: [CAD_CAM_EDM_DRO] Re: power supplies form those 24v

transformers

>
>
> > I posted a schematic in the files section.
> > Look in the folder "Jerry"
> >

http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/Jerry/Power_Supply

> > .pdf
> >
> >
> > Jerry
> >
> >
> > > Les,
> > > Thanks for the response. I'll be looking forward to a
> > schematic when
> > >
> >
> >
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