Re: A tall thin piggy, or a short squat piggy?

To: tesla-at-pupman-dot-com
Subject: Re: A tall thin piggy, or a short squat piggy?
From: "Area31 Research Facility" <rwstephens-at-hurontario-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Sun, 13 Feb 2000 18:55:09 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Paul,
 
Go for the 19.9 kV at 10 kVA pig.  Spend the extra money on the MMC cap.
It will be worth it.  You can design this system (determined by capacitor
value) if you wish to be optimum at 20 kVA full power which is easily
achievable with a 100 amp 230 volt domestic service.
 
This can get you in the 18 foot+ arc length coiling range.
 
Making this power at almost 3X the voltage from the pig will improve
efficiency because the gap losses (which dominate system losses) are a
function of current and will be substantially less (% of total system
power) than they'd be using a 7.2 kV pig.
 
Robert W. Stephens
Director
AREA31 Research Facility
www.area31-dot-org
----- Original Message ----- 
From: Tesla List 
To: tesla-at-pupman-dot-com 
Sent: Sunday, February 13, 2000 13:35
Subject: A tall thin piggy, or a short squat piggy?

Original Poster: "Paul Eugene Kidwell" <tmb-at-ieee-dot-org> 

Hi!

I've been thinking of building my first piggy powered TC. I've found
what appears to be a good source that offers a wide varity of pigs. 

My question is, which one to choose? 

They have 7.2 KV and 19.9 KV?
I know that it would be alot more difficult (i.e. costly) to make a 19.9
KV MMC than it would to make a 7.2 KV one. (I'm planning on going with
an MMC) But is 7.2 KV addiquite? With equal KVA ratings, would 19.9 KV
output out perform 7.2 KV? Would the difference in performance be enough
to justify the difficulties involved with the higher voltage?

They have 10KVA($95), 15KVA($135), & 25KVA($208)?
Would I be better off buying a smaller one, and working with that until
I wanted to go bigger, or buy a large one now and ballast the h*** out
of it till I build a *really* large TC?

I'm having trouble seeing the forest for the trees here :)

Paul

BTW, the source is Austin International
http://www.austinintl-dot-com/Transformers-Power.html