how to test a 11kv transformer?

To test an 11kV transformer, follow these steps: First, perform a visual inspection for any physical damage or leaks. Next, conduct insulation resistance tests using a megohmmeter to ensure proper insulation. Then, carry out a power factor test to assess the transformer’s dielectric properties. Additionally, perform a turns ratio test to verify the winding ratios. Finally, conduct a functional test by applying voltage and measuring output to ensure it operates within specified parameters.