Gas-insulated substation is smaller than conventional substation because of:

1. high insulation property of SF6 gas

2. high dielectric property of SF6 gas

3. high electronegative property of SF6 gas

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DDA JE (E&M) Official Paper (Held on 25 April 2018)
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  1. Only (1)
  2. Only (3)
  3. (1), (2) and (3)
  4. Only (2)

Answer (Detailed Solution Below)

Option 3 : (1), (2) and (3)
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Detailed Solution

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Gas-insulated substation:

A gas-insulated substation (GIS) is a high voltage substation in which the major conducting structures are contained within a sealed environment with a dielectric gas known as SF6, or sulfur hexafluoride gas as the insulating medium.

The total space required for a GIS is roughly one-tenth of that needed for a conventional substation.

The gas-insulated substation is smaller than the conventional substation because of:

  1. The high insulation property of SF6 gas
  2. The high dielectric property of SF6 gas
  3. The high electronegative property of SF6 gas
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