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The dielectric strength of SF6 is _______ that of air.
- a)same as
- b)2 to 3 times
- c)10 times
- d)5 to 6 times
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The dielectric strength of SF6is _______ that of air.a)same asb)2 to 3...
- In SF6 circuit breaker, Sulphur hexafluoride gas is used as the arc quenching medium.
- Due to its low gaseous viscosity and high molecular weight, the SF6 gas can efficiently transfer heat by convection.
- It has high insulating properties and highly electronegative properties.
- Pure Sulphur hexafluoride gas is inert and thermally stable.
- SF6 has a very high dielectric strength (breakdown strength). It has 100 times more effective than air and oil as interrupting mediums.
- Its dielectric strength is 2.5 times that of air and 30% less than that of the dielectric oil.
Most Upvoted Answer
The dielectric strength of SF6is _______ that of air.a)same asb)2 to 3...
Understanding Dielectric Strength
Dielectric strength is a crucial parameter in electrical engineering, indicating how well an insulating material can withstand electric fields without breaking down. It is measured in kilovolts per millimeter (kV/mm) and is essential for ensuring safety and functionality in electrical systems.
Comparison of SF6 and Air
- SF6 (Sulfur Hexafluoride): This gas is widely used as an insulating medium in high-voltage equipment due to its excellent dielectric properties.
- Air: Commonly used as a dielectric, air has a lower dielectric strength compared to specialized insulating gases like SF6.
Dielectric Strength Values
- SF6: Approximately 20 kV/mm.
- Air: Approximately 3 kV/mm.
Why SF6 is 2 to 3 Times Stronger
- Higher Molecular Weight: The heavier molecules of SF6 allow it to absorb more energy before ionization occurs compared to air.
- Low Temperature Coefficient: SF6 maintains its dielectric strength even under varying temperature conditions, making it more reliable.
- Non-Toxic and Non-Flammable: SF6 is safer to use in high voltage applications compared to some other gases.
Conclusion
The dielectric strength of SF6 is 2 to 3 times that of air, making it an ideal choice for high-voltage applications. This property allows electrical equipment to operate at higher voltages while minimizing the risk of breakdown, thus enhancing safety and efficiency in electrical systems.
Dielectric strength is a crucial parameter in electrical engineering, indicating how well an insulating material can withstand electric fields without breaking down. It is measured in kilovolts per millimeter (kV/mm) and is essential for ensuring safety and functionality in electrical systems.
Comparison of SF6 and Air
- SF6 (Sulfur Hexafluoride): This gas is widely used as an insulating medium in high-voltage equipment due to its excellent dielectric properties.
- Air: Commonly used as a dielectric, air has a lower dielectric strength compared to specialized insulating gases like SF6.
Dielectric Strength Values
- SF6: Approximately 20 kV/mm.
- Air: Approximately 3 kV/mm.
Why SF6 is 2 to 3 Times Stronger
- Higher Molecular Weight: The heavier molecules of SF6 allow it to absorb more energy before ionization occurs compared to air.
- Low Temperature Coefficient: SF6 maintains its dielectric strength even under varying temperature conditions, making it more reliable.
- Non-Toxic and Non-Flammable: SF6 is safer to use in high voltage applications compared to some other gases.
Conclusion
The dielectric strength of SF6 is 2 to 3 times that of air, making it an ideal choice for high-voltage applications. This property allows electrical equipment to operate at higher voltages while minimizing the risk of breakdown, thus enhancing safety and efficiency in electrical systems.
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The dielectric strength of SF6is _______ that of air.a)same asb)2 to 3 timesc)10 timesd)5 to 6 timesCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The dielectric strength of SF6is _______ that of air.a)same asb)2 to 3 timesc)10 timesd)5 to 6 timesCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The dielectric strength of SF6is _______ that of air.a)same asb)2 to 3 timesc)10 timesd)5 to 6 timesCorrect answer is option 'B'. Can you explain this answer?.
The dielectric strength of SF6is _______ that of air.a)same asb)2 to 3 timesc)10 timesd)5 to 6 timesCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The dielectric strength of SF6is _______ that of air.a)same asb)2 to 3 timesc)10 timesd)5 to 6 timesCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The dielectric strength of SF6is _______ that of air.a)same asb)2 to 3 timesc)10 timesd)5 to 6 timesCorrect answer is option 'B'. Can you explain this answer?.
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