Re: [TCML] Varnish

[jhowson4@xxxxxxxxxxx]

The core I have is rated for 1KVA, I am NOT designing this for 15kv at 1A. So it is indeed pretty close to a Neon in nature. But thinking in about this more I realize that this core might be more useful to me as a ballast to a potential transformer. What do you guys think? 

if any one is interested the core formally belonged to a 6KVA Stabiline voltage regulator. 
it was a buck boost transformer that was rated for 
65Vin &16Ain--->20V out 52Aout 

Thanks, 
John "Jay" Howson IV 

----- Original Message ----- 
From: "jimlux" <jimlux@xxxxxxxxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Sunday, April 18, 2010 10:32:32 AM GMT -05:00 US/Canada Eastern 
Subject: Re: [TCML] Varnish 

David Speck wrote: 
> Jay, 
> 
> At 15 KV, no varnish, epoxy, or other coating in reasonably thin layers 
> is going to be adequate to hold off that kind of voltage. 
> 
> You have to design your transformer intrinsically to provide that 
> voltage standoff, with an insulating bobbin for the windings of 
> sufficient size, conformation, and dielectric strength to keep the HV 
> away from the grounded core. Applying a few thousandths of varnish is 
> not going to improve the protection appreciably. 


> 
> It sounds like you are reinventing a 60 mA neon sign transformer. Would 
> it not be easier and faster to pick up one ready made off eBay, or from 
> your local neon sign shop? 
> 


15kV @ 1 Amp is a 15kVA transformer.. more like a small pole pig rather 
than a NST (60mA@15kV is less than a kVA) 



> Dave 
> 
> On 4/18/2010 3:30 AM, jhowson4@xxxxxxxxxxx wrote: 
>> Hey guys, I am attempting a make a 15Kv 1Kva transformer. the core is 
>> going to be a tight fit as such I am in need of a good varnish that 
>> can withstand the voltage stresses, I was looking for GE-7031 but that 
>> seems to be non existent and really expensive. anyone have any 
>> suggestions. 
>> 
>> Thanks, 
>> John "Jay" Howson IV 
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