[Amps] Transformer core shorted to secondary winding??

S. J. Blackwell w5lu at hotmail.com
Sat Jul 23 22:13:13 EDT 2005


No.  As one goes out from the core the capacity to the core goes down. He 
should ground the CT and recheck. He was measuring between the floating 
secondary and the chassis.
73,
Sam, W5LU

>From: "Will Matney" <craxd at engineer.com>
>To: amps at contesting.com
>Subject: Re: [Amps] Transformer core shorted to secondary winding??
>Date: Sat, 23 Jul 2005 21:06:26 -0500
>
>Sam,
>
>If it were capacitance causing this, the voltage on either side of the 
>secondary would give an equal voltage reading wouldn't it?
>
>Best,
>
>Will
>
>
>----- Original Message -----
>From: "S. J. Blackwell" <w5lu at hotmail.com>
>To: craxd at engineer.com, amps at contesting.com
>Subject: Re: [Amps] Transformer core shorted to secondary winding??
>Date: Sat, 23 Jul 2005 20:32:37 -0500
>
> >
> > Bill,
> > Before going off on this transformer, look at my off list message.
> > You are most likely measuring capacitively coupled volts with a
> > high impedence volt meter. Ground the CT and remeasure you should
> > get 1700 volts  (or more with late yrs higher line volts) between
> > each side and ground.
> > Sam, W5Lu
> >
> > > From: "Will Matney" <craxd at engineer.com>
> > > To: amps at contesting.com
> > > Subject: Re: [Amps] Transformer core shorted to secondary winding??
> > > Date: Sat, 23 Jul 2005 20:14:05 -0500
> > >
> > > Bill,
> > >
> > > It definately has a high-ohm short in the secondary. They've
> > > wound the primary on the outside which I dont like to do. That
> > > way the secondaries leaking to the core instead of the primary.
> > > If the primary had been the first coil and it did that, it would
> > > blow a fuse most likely. The best check to find it is use a
> > > megger or a hipot, and it would make it show quickly.
> > >
> > > Best,
> > >
> > > Will
> > >
> > >




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