Re: Putting two potential transformers in series

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: DRIEBEN-at-midsouth.rr-dot-com 

Hi Rick,

Yes, you can easily series to 7200 volt PTs together w/out
worrying about overvolting them, assuming that they are the
double-HV bushing type. If they have a single HV bushing,
you'd want to wire them like the internal wiring of an NST-
mid-point ground the 2 HV outputs for 7200 -0- 7200 volts.

David

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
Date: Thursday, December 18, 2003 9:16 pm
Subject: Putting two potential transformers in series

 > Original poster: "Rick Richter" <rrichter1-at-houston.rr-dot-com>
 >
 >
 >
 >     Hi all,
 >
 >     I have access to a couple 7.2 KV potential transformers and
 > was
 > wondering if I could wire their secondaries in series to get 14.4
 > KV, which
 > seems to be a more desirable voltage to use for coiling. I know
 > this isn't
 > a good idea for neon transformers, but since potential
 > transformers have a
 > Basic Impulse Level (BIL) rating of around 100 KV, would there
 > still be the
 > possibility of flashover internally like with NSTs? I realize the
 > I in BIL
 > stands for impulse, but at 7.2 KV maybe there's sufficient
 > internal
 > insulation to wire them in series without the flashover risk.
 > Anyone have
 > any experience in this area?
 >
 >
 > Thanks in advance,
 >
 > Rick