RE: [TCML] Selecting and testing pole transformers...

[Nick Andrews <nicothefabulous@xxxxxxxxxxx>]

Thanks for the advice on voltages and such!  Well...not to be greedy, but I was hoping to get a nice 5kVA unit for semi-permanent use as a JL energizer and a bigger one for later TC use.  I don't see running a pig power unit in my neighborhood, but want to grab one while it's available for when I buy a few acres.  I am hoping to be able to go to his yard and select from a variety of transformers, but we'll see.  If he has tons of them, maybe he'll be willing to sell some cheap if anyone on the list is near Las Cruces or El Paso.  I'll definitely ask.

Nick A






> From: drieben@xxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Selecting and testing pole transformers...
> Date: Tue, 22 Mar 2011 21:33:33 -0500
> CC: 
> 
> Hi Adam, Nick,
> 
> Yes, I would definitely agree, make sure its rated at 14400/24900
> volts on the HV side, not something lower, like 7200/12470 volts
> (BTW, the lower of the two slashed voltages is what you're going
> to be getting). 7200 volts is a bit on the low side and will require
> such critical  spacing of the SG contacts that the SG's ability (or
> lack thereof) to quench starts to become a real issue in high
> powered coil systems, not to mention increased danger of electrode
> crash in a rotary gap system.
> 
> As for the kVA rating, I would definitley say go for a 10 or a 15 kVA
> unit. 25 kVA may tend to be a bit overkill, as you can easily run a pole
> pig at 2 to 3X its nameplate kVA rating for relatively short, low duty
> cycle runs in Tesla coil service. I would definitely go bigger than a 5
> kVA unit, though, so you'll have room to "grow" ;^)
> 
> David
> 
> ----- Original Message ----- 
> From: "Yurtle Turtle" <yurtle_t@xxxxxxxxx>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Sent: Tuesday, March 22, 2011 6:09 PM
> Subject: Re: [TCML] Selecting and testing pole transformers...
> 
> 
> Make sure you get a 14.4 kV unit. I'd personally go with the 25 kVA, but 
> that's
> just me.
> 
> Adam
> 
> 
> ----- Original Message ----
> From: Nick Andrews <nicothefabulous@xxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Sent: Tue, March 22, 2011 2:18:04 PM
> Subject: [TCML] Selecting and testing pole transformers...
> 
> 
> Okay, I am supposed to be getting a pole pig form one of our subcontractors 
> who
> does electrical work. He says he has some even 15 and 25kVA units. I want a
> 5kVA (I think) or maybe 10kVA unit.
> 
> 
> If I can go to his yard and test them out before selecting one, what advice
> would those on the list give? Sure, a bigger tranny gives room to expand, 
> but
> the bigger it is, the heavier it is and the more room it takes up. And you 
> soon
> reach the limit of your electrical service to supply more juice! Thanks.
> 
> Nick A
> 
> 
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