Primary winding of trf shows 25 ohms,26.5 ohms and 1150 kiloohms respectively across terminals com to 380, 400, 415V. Why such changes in resistances

If the above trf tested for OC ..... connecting primary to Com  and 415V ....what would be the effect .....Note the rating of trf is 300VA

15 August 2017 3,429 7 View