RE: capacitive pole pig ballast

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

Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com> 


It is the inductance of the wire mostly.
Measurements by Gary Laus and Terry Blake of a 500ft Home Depot roll of
12 AWG was
0.9 Ohms 10.50 mH
The ballast does get warm (and probably not recommended for real long
runs >15 minutes at a time)
but does limit current to about 26A.

Dan



 > That does sound easier. Thanks.  How does that limit the current?
 >   Is it the resistance of the wire or the inductance of the roll?
 >
 > Steve
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Thursday, January 08, 2004 12:36 PM
 > Subject: Re: capacitive pole pig ballast
 >
 >
 >  > Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >  >
 >  > Tesla list wrote:
 >  >  >
 >  >  > Original poster: "Mccauley, Daniel H"
 > <daniel.h.mccauley-at-lmco-dot-com>
 >  >  >
 >  >  > Forget the capacitors.  If you are looking for a
 > simple, low-cost,
 >  >  > no-frills 3 kVA ballast, then the
 >  >  > 500ft roll of 12 AWG wire from Home Depot or similar
 > will do the trick
 >  >  > every time.
 >  >  >
 >  >  > Dan
 >  >  >
 >  >  >  > Could someone tell me how many .9uf  MO caps it would take to
 >  >  >  > ballast a
 >  >  >  > 10kva 14400v pig for 3 kva
 >  >  >  >
 >  >  >  > Thanks
 >  >  >  > Steve
 >  >
 >  > I've never understood "capacitive ballasting".  Resistive
 > or inductive
 >  > yes, but seems to me capacitors in the circuit work in the wrong
 >  > direction.
 >  >
 >  > Ed
 >  >
 >  >
 >  >
 >
 >
 >