Re: More on ABS

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

I had problems with an electrostatic device where the leakage current
through the carbon loading was excessive.

I've also had the pipe breakdown internally through the foam.  

Actually, the semiconductive properties help with the breakdown, because
they tend to equalize the electrical field stress.  

Nonhomogenous insulators break down at lower voltages than pure insulators,
because the dielectric constant of the components are different.  This
causes uneven distribution of the field/voltage, which provides a point for
a breakdown to start. Once the breakdown starts, it propagates.  



Tesla list wrote:
> 
> Original poster: "Kp2 by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<kp2-at-wvi-dot-com>
> 
> Well, Jim (Lux), seems you've had trouble with ABS before (I'm reading the
> list). Could the foam have arced because it was colored using carbon? The
> pipe I have is dyed througout...
> 
> Arcing in the foam is now my primary concern, yet I doubt the foam will be
> susceptable to an induced voltage for several reasons:
> 1) It does not conduct charge well
> 2) It is seperated from the coil by soil ABS and around 2mm of
> polyurethane.
> 3) The path of least resistance is through the toroid and into whatever
> and whoever is nearby. Or maybe not. Anyone have any ideas.
> -Jon Strauss
> 
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