RE: [CAD_CAM_EDM_DRO] Re: Transformer wiring hookup 110/220

It is really not two windings, it is a single winding with a center tap.

John Guenther
'Ye Olde Pen Maker'
Sterling, Virginia

> -----Original Message-----
> From: fozzyber <jerry@...> [mailto:jerry@...]
> Sent: Friday, January 17, 2003 10:59 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Transformer wiring hookup 110/220
>
>
> That is what I thought, but when I wire the "reds" together and wire
> the center black to 110v the transformer hums the lights dim, then
> the strip pops and the transformer gets slightly warm.
> Scary really. But with out both coils going I though I would only get
> half the amps.
>
> Jerry
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Bernard R
> <bwjarandall@c...>" <bwjarandall@c...> wrote:
> > When wiring a 110/220 transformer, the primarys are paralleled for
> > 110 and seriesed for 220. If there are two wires on the black
> > terminal, seperate them and parallel the two resulting coils. I'm
> > suprised that the reset tripped, I would have expected 0v on the
> > output if the phase was wrong.
> >
> > If you look at any dual voltage equipment, the primary fuse is
> > doubled for 110V operation, the corollary is that with only 1 half
> of
> > the primary in circuit, you'll only get half the secondary amps.
> >
> > Bernard
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "fozzyber <jerry@o...>"
> > <jerry@o...> wrote:
> > > I received my transformers today!!!
> > > I went to wire them up and had to stop to think about how to wire
> > > them.
> > > The transformers are (http://www.mpja.com/product.asp?
> > product=7846+TR)
> > > I hook the blues up for 24V, no problem
> > > The primary is what is confussing me.
> > > There are 2 red wires and one black.
> > > the label on top shows as follows
> > > RED 110V| |BLUE 12V
> > > | |
> > > Black | |Yellow
> > > | |
> > > RED 220V| |BLUE 12v
> > >
> > > I would assume if you were using a 220V you would just wire the
> > reds,
> > > and leave the center black disconnected.
> > > but what about 110V? I Hooke one red and the black.
> > > and bingo 24V across the blues.
> > > I started to think about this and though but I don't have the
> other
> > > half of the primary hooked up.
> > > So I wired the other red to the first red.
> > > The transformer hummed for a second, then tripped the reset on my
> > > power strip.
> > > How do I wire for both primarys to power up?
> > >
> > >
> > > Jerry
>
>
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