unit 2

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Across
  1. 2. What switch is used for both low level and medium voltage protection?
  2. 7. Vacuum Breaker Technology uses.
  3. 8. …………transformers also called constant voltage transformer.
  4. 9. An area of vulnerability is determined by total………
  5. 11. …………have the undesirable effects of drawing several times their full load current while starting.
  6. 13. ………….. is a decrease in RMS voltage or current at the power frequency for durations from 0.5 cycles to 1 minute.
  7. 14. An………………is a complete loss of voltage or a drop to less than 10 % of nominal voltage in one or more phases.
  8. 15. The connection of the component network depends on the…………..type.
Down
  1. 1. The most basic over-current protective element on the system.
  2. 3. ……..starters is induction motor starting methods.
  3. 4. ……………..switching method is used to reduce the fault clearing time.
  4. 5. It is connected in series between a distributed system and a load.
  5. 6. A standby power supply is sometimes termed………….UPS.
  6. 10. To compute voltage sag performance average feeder…………is used.
  7. 12. A device can be used to alleviate voltage sags and rief interruptions.