Transformer polarity test in tamil 

#transformer polarity_test
#transformer_polarity_test_tamil
#transformer_polarity_test_in_tamil
#transformer
#transformer_tamil
transformer polarity test explained in Tamil
#polarity_test_of_transformer
types of polarity test conducted in transform
types of testes conduct in transformer
Why polarity test is necessary for a transformer?
What tester is used for polarity?