RE: Transformer Proctection Circuits?

To: tesla-at-pupman-dot-com
Subject: RE: Transformer Proctection Circuits?
From: Terry Fritz <twftesla-at-uswest-dot-net>
Date: Thu, 10 Feb 2000 07:09:35 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme
In-Reply-To: <NCBBLNLHCJEMOCIKJCJDEEMNCCAA.parn-at-fgm-dot-com>
References: <4.1.20000119202327.00a3faf0-at-pop.dnvr.uswest-dot-net>

At 07:38 AM 02/10/2000 -0500, you wrote:
>
snip....
>> 	Option (3) is my favorite.  It gives good high frequency 
>> attenuation and
>> the caps referenced to ground help insure that the secondaries 
>> cannot float
>> to a great voltage.  I also use MOVs and spark gaps in the protection
>> filter.  I have a string of 1800V  2500A MOVs from each secondary leg to
>> ground.  On the spark gap side of the protection filter, I have a 
>> spark gap
>> with each leg referenced to ground.  With this filter and MMC caps,
>> secondary to primary strikes should be fully protected against.  I do not
>> use strike rails.
>> 
>> Cheers,
>> 
>> 	Terry
>
>Hi Terry,
>
>Do you by any chance have a diagram on the web I can take a
>look at showing your protection circuitry?
>
>Many Thanks,
>Bill
>

Hi Bill,

See the following.  Not that the values may change depending on your NST
and such.  The resistors should dissipate about 5-10% of the system power.

http://users.better-dot-org/tfritz/newcoil/newcoil.gif
http://users.better-dot-org/tfritz/newcoil/19.jpg
http://users.better-dot-org/tfritz/newcoil/115.jpg
http://users.better-dot-org/tfritz/newcoil/116.jpg

Cheers,

	Terry