HV 1

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Across
  1. 2. paper insulation is mainly used in ________
  2. 5. the material used for insulation that is exposed to atmosphere is _________
  3. 6. the best insulation among all insulating materials available is ___________
  4. 11. for high frequency applications the _________ plastic is preferred.
  5. 13. SF6 is ____________ gas
  6. 14. the breakdown voltage of a spark gap for impulse voltage is ________ compared to breakdown voltage of power frequency ac.
  7. 15. in high voltage switch gear the insulation used inside the breaker is _________
Down
  1. 1. thermal classification of insulating material is done for _________
  2. 3. breakdown is_____________ in solids
  3. 4. synthetic liquid dielectrics are mainly used in _______
  4. 7. the new insulating liquids that have been used in recent years are__________
  5. 8. the most commonly used liquid as insulating medium is ________________
  6. 9. electrical conduction in gases was first studied in 1905 by ________
  7. 10. transformer oil is__________oil.
  8. 12. the usual mechanism of breakdown in solid dielectric is ________breakdown.