CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Transformer question

Posted by Jon Elson
on 2001-01-12 23:15:57 UTC
JanRwl@... wrote:

> In a message dated 12-Jan-01 07:33:25 Central Standard Time,
> jvicars@... writes:
>
> > Do transformers work on a ratio of input to output, or are they strictly for
> > the rated voltages? In other words if I have a 240 to 120 step down and I
> > put 120 on the primaries will I get 60 V on the secondaries? What are the
> > practical limits to doing what I described? Thanks
> >
> Yes. However, you could NOT expect to get the full POWER through a
> transformer possible when using "rated voltage", as the CURRENT must be kept
> lower, too, as the current-handling is a function of wire-cross-section (how
> "fat" the copper is).
>
> Also, you can NOT try to put 240 V. into a winding rated for 120 V!!! That
> might work for five seconds- yes, you would expect to get twice the
> secondary voltage normal, but the NUMBER OF TURNS had been calculated for the
> design-voltage, so, doubling it would over-burden the primary, even if NO
> load, and it would likewise cook things, very-probably with undue danger to
> buildings, lungs, children, pets, and other living things!

Actually, what will happen is the magnetic circuit will saturate, and the primary
will stop being an inductor, and become a short piece of solid wire, in other
words, a short circuit. It will make loud buzzing noises and trip the circuit breaker
very quickly, in most cases. Very small transformers might cook, anything over
100 W or so will just pop a breaker.

Jon

Discussion Thread

Joe Vicars 2001-01-12 05:31:42 UTC Transformer question Jon Elson 2001-01-12 11:45:08 UTC Re: [CAD_CAM_EDM_DRO] Transformer question Dick Ganderton 2001-01-12 15:58:28 UTC Re: [CAD_CAM_EDM_DRO] Transformer question JanRwl@A... 2001-01-12 20:01:01 UTC Re: [CAD_CAM_EDM_DRO] Transformer question Ray 2001-01-12 20:12:38 UTC Re: Transformer question Jon Elson 2001-01-12 22:57:41 UTC Re: [CAD_CAM_EDM_DRO] Transformer question Jon Elson 2001-01-12 23:15:57 UTC Re: [CAD_CAM_EDM_DRO] Transformer question Roman Black 2001-01-13 09:06:54 UTC Re: Transformer question Hugh Prescott 2001-01-13 10:44:27 UTC Re: [CAD_CAM_EDM_DRO] Re: Transformer question Tom Caudle 2001-01-13 18:52:34 UTC Re: Transformer question Tom 2001-10-29 15:18:18 UTC Transformer question JanRwl@A... 2001-10-29 19:31:43 UTC Re: [CAD_CAM_EDM_DRO] Transformer question Jon Elson 2001-10-29 21:31:59 UTC Re: [CAD_CAM_EDM_DRO] Transformer question Carol & Jerry Jankura 2001-10-30 05:55:58 UTC RE: [CAD_CAM_EDM_DRO] Transformer question Ray 2001-10-30 06:53:34 UTC Re: Transformer question tcsibor@v... 2001-10-30 11:27:32 UTC Re: Transformer question Andre' Blanchard 2001-10-30 14:26:15 UTC Re: Transformer question JanRwl@A... 2001-10-30 18:11:41 UTC Re: [CAD_CAM_EDM_DRO] Re: Transformer question Ray 2001-10-31 12:47:16 UTC Re: Re: Re: Transformer question JJ 2002-10-01 16:12:47 UTC Transformer question mariss92705 2002-10-01 16:27:54 UTC Re: Transformer question JJ 2002-10-01 16:29:57 UTC RE: [CAD_CAM_EDM_DRO] Re: Transformer question Raymond Heckert 2002-10-01 17:14:39 UTC Re: [CAD_CAM_EDM_DRO] Transformer question Carol & Jerry Jankura 2002-10-01 18:18:50 UTC RE: [CAD_CAM_EDM_DRO] Transformer question JJ 2002-10-02 16:15:18 UTC RE: [CAD_CAM_EDM_DRO] Transformer question eissej143 2002-10-26 22:49:20 UTC Re: Transformer question Tom Murray 2002-11-19 09:04:16 UTC Transformer question aussiedude 2002-11-19 09:36:53 UTC RE: [CAD_CAM_EDM_DRO] Transformer question turbulatordude 2002-11-19 19:14:42 UTC Re: Transformer question JanRwl@A... 2002-11-19 19:23:28 UTC Re: [CAD_CAM_EDM_DRO] Re: Transformer question JanRwl@A... 2002-11-19 20:02:00 UTC Re: [CAD_CAM_EDM_DRO] Transformer question Raymond Heckert 2002-11-20 16:26:58 UTC Re: [CAD_CAM_EDM_DRO] Transformer question