Megger Test 3 Phase Transformer

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#1 21662030 01 May 2012 12:15

D OConnell D OConnell

Anonymous

Post #1
21662030 01 May 2012 12:15

I need to test a 13,800V to 600V, 2MVA transformer. What are the connections for the megger to transformer?
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#2 21662031 01 May 2012 12:33

Shannon Allen Shannon Allen

Anonymous

Post #2
21662031 01 May 2012 12:33

From the megger to the transformer?

You'd test hi-lo, lo-grd, hi-grd most of the time. I would usually use the red lead on the portion that is being tested. If you want, you can guard out whichever element you want to measure. For instance, for hi-lo, connect your guard terminal to the frame of the transformer, so the measurement is of the insulation between the hi side windings and low side winding only.

Check out http://www.powercet.com/uploads/files/AE_Understnd_Insulation_Res_Testing.pdf
#3 21662032 01 May 2012 12:45

D OConnell D OConnell

Anonymous

Post #3
21662032 01 May 2012 12:45

cheers for that, that's basically what I needed to refresh me, it's been about five years since I've performed this task, thank you.
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