Re: pig (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 27 Jun 2007 14:02:47 +0000
From: David Rieben <drieben@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Cc: drieben@xxxxxxxxxxx
Subject: Re: pig (fwd)

Gene,

These readings do not necessarily indicate a short. The 
AC reactance of the counter electro-motive force (Cemf)
is what causes the resistance that allows AC of the pro-
per voltage and frequency to be fed into the coil(s) of a 
transformer without the fireworks. The measured DC re-
sistance is only representative of the actual resistance of
the copper or aluminum conductors of the coils and should 
rightfully be very low in a functional transformer

Also, please don't take offence to our warnings as we're 
only concerned for your safety and would not want to
see you seriously injure or even kill yourself becuase of
lack of knowledge or inexperience with pole xfmrs. A pole
transformer is an entirely different animal than a TV 
or CRT flyback transformer and is a few orders of
magnitude more powerful! Anyone can look at the 
sheer differnece in their mass and tell this. As a TV repairman, 
you may very well have been "bitten" a time or two
by the hgih voltage in the back of a television. I'm sure
that this was quite unpleasant but you were able to take
note and be more careful the next time. However, an
accidental brush with the HV output of pole transfomer
would result in a far more grave outcome for you - as in
most likely death! Most coilers start out with smaller
systems that can be driven by a neon sign transformer(s)
(NST), an oil burner ignition transformer(s) (OBIT) or a
microwave transformer(s) (MOT) and gradually work their
way up to bigger ones as they gain more experience. It should  
be noted that the output of these transformers is still dangerous
but in most cases, an accidental contact with their HV out-
puts will result in a very painful, but usually survivable, 
shock and possibly some burns. It should also be noted that
the output of an MOT CAN also be fatal due to their
relatively high output amperage. However, the output of
a pole pig is extremely dangerous and contact with this
will LIKELY have fatal results! Bottom line, Tesla coil
building and operation is inherently dangerous due to
the high voltages and anyone who takes on this hobby
takes on some degree of risk. However, the risks can
be managed to acceptable levels if proper precautions
and safety procedures are taken and followed. Playing 
around with pole xfmrs without really knowing what one
is doing definitely places one in a risk category that's far
beyond reasonable! 

Happy Sparking but be careful,
David Rieben

-------------- Original message -------------- 
From: "Tesla list" <tesla@xxxxxxxxxx> 

> 
> ---------- Forwarded message ---------- 
> Date: Tue, 26 Jun 2007 16:07:15 -0700 (PDT) 
> From: GENE GARRAGE 
> To: Tesla list 
> Subject: Re: pig (fwd) 
> 
> 
> 
> Tesla list wrote: 
> ---------- Forwarded message ---------- 
> Date: Tue, 26 Jun 2007 15:45:26 -0500 
> From: resonance 
> To: Tesla list 
> Subject: Re: pig (fwd) 
> 
> 
> 
> Well said Dave. 
> 
> If Gene doesn't understand how a pole xmfr works he should definitely NOT be 
> using one. The risk of death is too high. 
> 
> If his knowledge of electrical engineering is weak he needs to find a course 
> of study before tinkering with a pole xmfr that could easily kill him. 
> 
> Dr. Resonance 
> 
> 
> > ---------- Forwarded message ---------- 
> > Date: Tue, 26 Jun 2007 17:33:59 +0000 
> > From: David Rieben 
> > To: Tesla list 
> > Cc: drieben@xxxxxxxxxxx 
> > Subject: Re: pig (fwd) 
> > 
> > Gene, 
> > 
> > It sounds like you have a dual high voltage bushing terminaled, 25 
> > kVA rated transformer. As others have already stated in response 
> > to your initial post, you MUST ballast your 240 volt input to it to 
> > be able to short the high voltage output without immediately tripping 
> > your breaker. However, you can hook it up to 240 volt input with- 
> > out ballasting the input as long as you do not short the high voltage out- 
> > put, IF your transformer is "good". Of course, not being able to short 
> > (spark) it ain't no fun, is it? 
> > 
> > It sounds like that you don't have a lot of previous experience with 
> > pole pigs. Let me strongly encourage you to be VERY CAREFUL 
> > as the voltages generated by these transformers is EXTREMELY 
> > LETHAL! You're not dealing with a run-of-the-mill NST or OBIT! 
> > 
> > 
> > You should have 3 low voltage bushings on the side of the tank. 
> > The two outer LV bushings are for the (ballasted) 240 volt input. 
> > There will probably be a copper grounding strap from the center 
> > LV terminal to the side of the tank. Remove it and leave the center 
> > terminal open. To properly test it out, hook a ballasted 240 volts 
> > (you can even use an MOT, with the secondary shorted, in series 
> > with the 240 volt input to ballast it if you have nothing else, just to 
> > test it out). Once you've got a ballasted 240 volts going into it, 
> > carefully short the high voltage "rabbit ears" bushing terminals to 
> > each other with a metal wire or strip on the end of a heavily insulated 
> > plastic pipe to see if you can draw any kind of arc. 
> > 
> > David Rieben 
> > 
> > -------------- Original message -------------- 
> > From: "Tesla list" 
> > 
> >> 
> >> ---------- Forwarded message ---------- 
> >> Date: Mon, 25 Jun 2007 17:22:18 -0700 (PDT) 
> >> From: GENE GARRAGE 
> >> To: tesla@xxxxxxxxxx 
> >> Subject: pig 
> >> 
> >> hi dave or anybody .This thing has 2 terminals in .I would think 230 v 
> >> Has 2 big 
> >> insulators on top .Its open everywhere .to everywhere.no desecent ground 
> >> on tank 
> >> says 25 on side for sale cheep. tks gene 
> >> 
> >> 
> >> 
> >> --------------------------------- 
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> > 
> > 
> 
> Hey you guys . Gene repairs television ,not pole pigs. I did not think , 
> Input & output would measure dead short 0 ohms or 9 ohms on sec. I hook 12 
> v & got a meter full .WOW TKS FOR THE HELP GENE. 
> 
> 
> 
> 
> 
> 
> 
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