how to do megger test/insulation resistance for transformer?

#InsulationResistanceTestofTransformer
#IRTestofTransformer
#TransformerInsulationResistancTest
All the below topics have been clear through this video :
1- Insulation Resistance (IR) Test value measurement.
2- Definition of Insulation Resistance test of transformer.
3- Purpose of Insulation resistance test of transformer.
4- Test equipment of Insulation resistance test of transformer.
5- Safety reference of Insulation resistance test of transformer.
6- Precautions of Insulation resistance Test of transformer.
7- Test method of Insulation Resistance test of Transformer
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