Re: Bad Pig?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Christoph Bohr" <cb@xxxxxxxxxxxxxxx>

Hello Curt, all.

I am not really a expert on pigs,
as we do not have such transformer where I
live. But I too suspect, that a faul is more likely
to occour on the outer ending of the HV winding or
on the connection to the bushings. Changing the tap
might be a good idea, but i doubt it would help a lot,
unless you electricaly disconnect the defective rest of
the winding. But this is probably possible.
After all, I would not trash the pig until I tried everything.
If you drain the oil into another container and let the core
sit for a few days the oil mess is not that big.

Good luck

Christoph Bohr


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, January 15, 2006 8:31 PM
Subject: Re: Bad Pig?


> Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
>
> Hi Curt,
>
> At least this clears up conflicting info.  You might want to pop off
> the top and take a visual look.  Maybe (if you're lucky) the short is
> in the interconnect between the transformer and the bushings.  It
> might also be a good exercise to try to localize the short to one of
> the three coils (primary, HV1, HV2).  A DC current source like a
> current limited DC power supply can be used with a DVM to follow the
> current path.  Dump the oil into another container and pull the
> transformer from its case if you need to get better access.  Learn
> what you can before you pull it however.  If you can fix it, you may
> want to put new mineral oil back into the case to minimize contamination.
>
> Gerry R
>
> >Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>
> >
> >I was wrong when I made that statement.  When I do
> >220V straight across it, it trips the breaker
> >magentically and it does not give a visual indication
> >that it is tripped.  I realizred my error last night
> >with the volt and current meters connected.
> >
> >Sorry for the confusion.
> >
> >Curt.
>
>
>
>
>