Re: Megger test.

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

Original poster: "Kristian Ukkonen by way of Terry Fritz <twftesla-at-qwest-dot-net>" <kristian.ukkonen-at-iki.fi>


Tesla list wrote:
> Original poster: "Mr Gregory Peters"
> As afore mentioned, I priced a reconditioned pole pig at $1045
> Australian. However, they will sell me an unconditioned unit for $500
> Australian (about $250 US). They say the only test they will do on the
> transformer is a megger test. What is a megger test? Is this a reliable

Propably insulation resistance measurement. 

Megger is one the manufacturers of such test devices.

> indication of the transformers integrity? Would you guys suggest saving
> for the reconditioned unit or buying the "as is" unit? I figure I can
> buy two of the "as is" uints for the price of 1 reconditioned unit, and
> the chances of both being duds are minimal. What do you think?

It really depends on why the pigs are at the company 
"to be reconditioned".. If because of non-fatal problems 
noticed at power company, then the propability can be high 
for "duds".. Then again, perhaps they are just reconditioned 
because of old age? Ask them!

What does their "reconditioning" mean?
Visual check inside? Change the oil? complete rewinding?
Definitely ask what the extra 250usd will get you..

If rewinding and new oil, I'd go for it. IMHO.

Best regards,

  Kristian Ukkonen.