Re: [TCML] pole pig ballasting

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

Most folks are assuming this is a single phase transformer. We have lotsa 12,470 to 480 transformers at work, but they are three phase. Do you know what three phase is? Is there a schematic that you can take a photo of and post somewhere? How many HV and LV bushings are there?

Adam

--- On Thu, 7/17/08, David Rieben <drieben@xxxxxxxxxxx> wrote:

> From: David Rieben <drieben@xxxxxxxxxxx>
> Subject: Re: [TCML] pole pig ballasting
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Thursday, July 17, 2008, 7:15 PM
> Hi Garry, Aaron,
> 
> Aaron is correct. 7200/12470Y volt rating is a much
> more common primary voltage rating than just 12,470 
> volts. However, if "12470" IS the only thing
> stamped 
> on the nomenclature tag, then it is rated at12,470 volts. 
> BTW, if the low voltage side is rated at 277 volts, run-
> ning 240 volts through a 240/280 volt variac will give 
> you the option of up to 280 volts input from a standard
> 240 volt service, which will put you just about right on
> the nameplate rating target for the high voltage output ;^)
> 
> --
> David Rieben
> 
> -------------- Original message -------------- 
> From: jaholmes@xxxxxxxxxxxxxxxxxx 
> 
> > If "7200" is nowhere on the nameplate, it
> probably is 12470V. That is very 
> > uncommon, but not unheard of. 7200/12470Y is, on the
> other hand, very common, 
> > and just means 7200V. So if all you see is
> "12470", you can be happy :-) 
> > 
> > 7200V would not be the end of the world by itself (it
> does present some solid 
> > challenges in spark gap design as David mentioned),
> but with the 277V secondary 
> > you would only be able to expect about ~6kV out with
> residential 240V service. 
> > Another kV off the already-low 7200V would be a major
> bummer. 
> > 
> > Anyway, if you have any questions about the nameplate
> data just post them here 
> > and those pig-wranglers among us will be happy to try
> and disambiguate anything. 
> > 
> > Cheers, 
> > Aaron, N7OE 
> > 
> > --- On Thu, 7/17/08, garry neeley wrote: 
> > 
> > > From: garry neeley 
> > > Subject: Re: [TCML] pole pig ballasting 
> > > To: "Tesla Coil Mailing List" 
> > > Date: Thursday, July 17, 2008, 11:36 AM 
> > > I hope it isn't 7200v. I haven't tested
> it yet. 
> > > The nameplate says primary 
> > > volts 12470, secondary 277/480y. So what is it
> guys 7200 
> > > or 12470? 
> > > 
> > 
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