Re: AC Split phase motor????

["R.E.Burnett" <R.E.Burnett-at-xxxxxxxxxxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

Hi John,

I think I suggested that the arc that killed my SRSG motor possibly
entered through a vent hole.  I have video evidence of a brilliant arc
curving in under the base,  and striking the side of the motor seconds
before all heck broke loose !  The video resolution isn't great, so I
am assuming it must have struck something inside the motor,  as the
housing was securely grounded.  The run winding failed open circuit.

As it happened my motor feed was fused at 13A (240V) to withstand the
extra starting current with the modified motor.  Maybe the run winding
would not have fused if the supply had been fused at a lower current.

Youv'e guessed it,  my next motor is of the totally sealed variety ;-)

						-Richie,


On Sat, 11 Nov 2000, Tesla list wrote:

> Original poster: FutureT-at-aol-dot-com 
> 
> In a message dated 11/10/00 6:58:29 PM Eastern Standard Time, 
> tesla-at-pupman-dot-com writes:
> 
> > Hi John, Scot,
> >  
> >  As reason would seem to dictate this, this does not necessarily seem 
> >  to be the case from my personal experience. I did almost exactly the 
> >  same thing that Scot did a few months back with my large "Medusa"
> >  system, and my motor's case was indeed grounded to the RF ground.
> >  The motor still went deader than a hammer and I had to replace it.
> >  
> >  Keeping 'em Sparkin' in Memphis,
> >  David Rieben
> 
> David,
> 
> Was your's the case where the spark went though the vent hole
> in the motor and hit the windings?  I know that happened to someone,
> but I figure that's a rare case.
> 
> John Freau
> 
> 
> 
>