Re: Inductive Kick LTR Pig Systems

[Terry Fritz <twftesla-at-uswest-dot-net>]

Hi Robert,

        Marc was using motor "start" caps...  Nuff said... :-)  These high
value
start caps were probably pulling enormous current for an extended time across
their high loss dielectrics which easily explains the temperature.  I am a bit
surprised they work as well as they did.  Must be very good caps!

Kick backs and such should not be a problem.  However, a full fault study of
all the "things that can go wrong" should be done to detect "bad things" that
may need to be designed for.  There is a fairly significant background of
design into the NST LTR systems but much of that cannot be extended to pig LTR
systems.  My guess would be that the safety and protections stuff is just as
easy but it really needs to be looked at hard considering the power and damage
potential.

Cheers,

        Terry


At 04:55 PM 8/27/00 -0400, you wrote: 
>
> Terry, All,
>  
> Is it possible that the unusual heating of Marc's PFC cap was due to
> dielectric losses as it tried to shunt RF kickback coming out through the
> mains wiring? His PFC cap might have had a mylar or perhaps even more lossy
> dielectric to RF.  From personal experience I know there can be enough nasty
> RF on the primary side of a pig system to smoke a large variac if bypassing
> measures are not employed.
>  
> Robert W. Stephens
> Director
> AREA31 Research Facility
> <http://www.area31-dot-org>www.area31-dot-org
>>
>> ----- Original Message ----- 
>> From: <mailto:tesla-at-pupman-dot-com>Tesla list 
>> To: <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com 
>> Sent: Sunday, August 27, 2000 14:48
>> Subject: Re: Inductive Kick LTR Pig Systems
>>
>> Original poster: Terry Fritz
>> <<mailto:twftesla-at-uswest-dot-net>twftesla-at-uswest-dot-net>
>>
>> Hi Bart,
>>
>> <snippage>
>>
>> I would be surprised if this has not been known.  But stranger things have
>> happened in this hobby ;-)  The heating Marc saw on his caps is strange...
>> <more snippage>
>> Cheers,
>>
>> Terry
>>
>