Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ____________?
Correct answer: D. Compressed SFe gas
- A. Polyvinyle chloride
- B. Vulcanised rubber
- C. Impregnated paper
- D. Compressed SFe gas
- E. none of the above
Explanation
At extremely high voltages, compressed SF6 gas is preferred in gas-insulated cable systems because its high dielectric strength permits compact insulation. PVC, rubber and paper are not suitable for a 1000 kV cable at this level.
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