Re: megger test 3 phase transformer

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@doc70 said:
I have a 13800V to 600V 2MVA step-down transformer.

I need to megger test this unit, I have a megger good for 5KV and also a hi-pot DC tester (Megger brand).

I am unclear of how to make the physical connections between the transformer and the testers.

make sure the transformer is not connected to any thing like the potential transformer,than carry out

[1] usual insulation test between the frame and the connections terminations of the ht side.

[2] test between frame and the lv side terminations.

[3] test between ht terminations and LV terminations.

[4] test between phases at HT side

[5] test between phases at LV side.