Answer / abhijeet

Generally tan delta test is taken on voltage level of 2
kV,5kV , 10 kV using test kits. but factories perform the
test on rated voltage level of that particular instrument.

Answer / k.prakashchandra

Our 110/11 KV Tr was tested with 2.5 to 15 KV at an
increment of 2.5 KV

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