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Impulse Generators (was pole pig rating)


Those of you who are interested in Impulse Generators, may care to look at our 
recently refurbished 800kV Marx Impulse Generator.  This refurbishment work
was 
completed inhouse, the initial design was carried out by one of my 
post-graduate students.  A description of the generator can be found at:
http://www.cee.hw.ac.uk/~kss/impulse/impulse.htm

Ken

On Tue, 30 May 2000 08:01:06 -0600 Tesla List <tesla-at-pupman-dot-com> wrote:

> Original Poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 
> 
> An impulse generator is typically a capacitor charged up to the appropriate
> voltage with resistors to set the rise and fall times.  For higher voltages
> (say >100kV) where capacitors get hard to make, the Marx configuration is
> popular, although impulse transformers are also used.  The Haefely Test AG
> web site(http://www.haefely-dot-com/ or
> http://www.haefely-dot-com/high_voltage_test/index.html (Haefly is a big mfr of
> this sort of test equipment) is quite interesting.
> 
> ----------
> > From: Tesla List <tesla-at-pupman-dot-com>
> > To: tesla-at-pupman-dot-com
> > Subject: Re: Pole pig rating
> > Date: Monday, May 29, 2000 9:37 PM
> > 
> > Original Poster: "Stan" <sdarling-at-columbus.rr-dot-com> 
> > 
> > 
> > 
> > Tesla List wrote:
> > > 
> > > Original Poster: "Bert Hickman" <bert.hickman-at-aquila-dot-com>
> > > 
> > SNIP
> > > This means that in a properly designed system, an arrestor should
> > > virtually always break down before a critical element, even accounting
> > > for statistical variation in arrestor breakdown timing and voltage. BIL
> > > is tested using a HV surge generator which is designed to develop an
> > > approximation of a lighting transient - a fast risetime (1.2 uSec)
> > > followed by a relatively slow (50 uSec) decay. Transformers must be
> able
> > > to withstand the BIL test three times with NO breakdown. A typical 14.4
> > > kV pole pig will usually have a BIL of between 95 and 110 kV. In either
> > > case, this level of insulation makes for one tough beast!
> > > 
> > 
> > Bert, that HV Surge generator sounds interesting.  What kind of device
> > do they use--how does it function (eg Tesla type, Marx, etc)--and what
> > kind of output ratings would it have?
> > 
> > -Stan
> > > 
> > > -- Bert --
> > > --
> > > Bert Hickman
> > > Stoneridge Engineering
> > > http://www.teslamania-dot-com
> > 
> > 
> 
> 

---
K.S. Smith BScEng, PhD, MIEE, MIEEE, CEng, FRSA
Department of Computing and Electrical Eng.
Heriot-Watt University
Edinburgh, EH14 4AS, Scotland.
e-mail: kss-at-cee.hw.ac.uk
tele:   0131 451 3328
http://www.cee.hw.ac.uk/~kss
fax:    0131 451 3327