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The non-uniform distribution of voltage across the units in a string of suspension insulators is due to:
  • a)
    Unequal self-capacitance of the units
  • b)
    The existence of stray capacitance between the metallic junctions of the units and the tower body
  • c)
    Non uniform distance of separation of the units the tower body
  • d)
    Non uniform distance of between the cross arm and the units
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The non-uniform distribution of voltage across the units in a string o...
Important points regarding the voltage distribution over a string of suspension insulators:
1) Due to the presence of shunt capacitor, the voltage across the suspension insulators does not distribute itself uniformly across the each disc.
2) The voltage across the nearest disc to the conductor is maximum than others disc.
3) The unit nearest to the conductor is under maximum electrical stress and is likely to be punctured.
4) In the case of D.C voltage, the voltage across each unit would be the same. It is because insulator capacitance are ineffective for D.C.
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Most Upvoted Answer
The non-uniform distribution of voltage across the units in a string o...

Explanation:

Stray Capacitance Between Metallic Junctions and Tower Body

- The non-uniform distribution of voltage across the units in a string of suspension insulators is primarily due to the existence of stray capacitance between the metallic junctions of the units and the tower body.
- This stray capacitance creates additional paths for current flow, causing voltage to be distributed unevenly across the insulator string.
- The capacitance between the metallic parts and the tower body can vary depending on factors such as the proximity of the metallic junctions to the tower body and the surrounding environment.
- As a result, some units in the insulator string may experience higher voltages than others, leading to potential issues such as flashovers or breakdowns.

By addressing the stray capacitance between the metallic junctions and the tower body, engineers can work towards achieving a more uniform distribution of voltage across the units in a suspension insulator string.
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The non-uniform distribution of voltage across the units in a string of suspension insulators is due to:a)Unequal self-capacitance of the unitsb)The existence of stray capacitance between the metallic junctions of the units and the tower bodyc)Non uniform distance of separation of the units the tower bodyd)Non uniform distance of between the cross arm and the unitsCorrect answer is option 'B'. Can you explain this answer?
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