Re: Transformer wiring hookup 110/220

OK one red and one black it is.
I'm really getting strong voltage with this transformer.
I'm supposed to get 24V but reading on the DVM shows 29.8V
at the end with two in series I get 81.1 Vdc
Hope I don;t blow the geckos


Jerry



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "j.guenther"
<j.guenther@v...> wrote:

> 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@o...> [mailto:jerry@o...]
> > 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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