Re: Power Transformer
- Thanks for your help.
I had it hooked up wrong. I had the mains hooked up to the
secondaries. And, since the secondaries were very low resistance it
was throwing my breaker everytime. It works great now. I read 26
volts AC on my multimeter. Perfect.
Your explaination of transformers helped.
--- In Electronics_101@y..., "manifold" <manifold_1@y...> wrote:
> You can always use an Ohm meter to check the DC resistance of the
> windings. That will tell you quite a bit about the transformer. I
> have successfully determined coil arrangements in transformers with
> just an ohm meter so it can't be that hard.
> o How do you know that the transformer is 110VAC to 24VAC? Is it
> stamped on the transformer somewhere?
> Once you know for sure what it is supposed to do, you can determine
> how it does it. Check the leads and measure the resistance.
> Generally, the high resistance leads will be the primary winding of
> step down transformer. And yes you are right, the higher voltage,
> lower current primary wires should be of a smaller guage than the
> high current low voltage secondary wires.
> Other arrangements of the primary winding can cause confusion. Some
> transformers have a split primary so that it can be operated at
> or 240V. Some secondaries may be split windings or center tapped.
> If the breaker opened, then there is a definitly a problem. A short
> in either the primary or the secondary could cause the breaker to
> open even if you did get it wired correctly.
> --- In Electronics_101@y..., "dirt939" <dirt@d...> wrote:
> > I got a new transformer the other day from a surplus supplier,
> > Electronics Goldmine. I do not have any specs on it, but I do
> > it is 110 Volts (1.1 Amps) on the primary and 24 Volts (4.5 Amps)
> > the secondary at 50% Duty. I tried hooking it up the other day
> > it immediately threw my breaker switch. So, I have a couple of
> > questions.
> > Without specs, how can I know which leads are the primaries and
> > ones are the secondaries? I assume the leads attached to the
> > gauge wire is the primary.
> > Is there any way to test this transformer to see if it is bad?
> > Any suggestions would be greatly appreciated.