The dielectric strength of SF6 gas (used in circuit breakers) is approximately
- A. Same as that of air
- B. 2 to 3 times more than air
- C. 10 to 20 times more than air
- D. 2 to 3 times less than air
Answer: B. 2 to 3 times more than air
Explanation: Sulphur hexafluoride (SF6) is an electronegative gas whose dielectric breakdown strength is roughly 2.5 to 3 times that of air at atmospheric pressure.