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Question (06+06+06+06 ) - a) Examine and Identify the cause of the followings: i) The air blast...

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Electrical Engineering

Question (06+06+06+06 ) -

a) Examine and Identify the cause of the followings:

i) The air blast breakers are very sensitive to the rate of riseof re-striking voltage.

ii) Circuit interruption easier in an AC circuit than in a DCcircuit.

iii) Surge diverters located very close to the equipment to beprotected.

b) Assuming the same peak value, compare the following twosurges: 1/50 usec surge and 3/50 usec surge.

Answer & Explanation Solved by verified expert
4.1 Ratings (447 Votes)
Answer a i In air blast CB it is observed that tge rate at which dielectric strength of the gap increases it lowers than the other circuit breakers Since air has a much lower dielectric strength than the gases at same temperatures and the pressure in the oil circuit breaker The dielectric strength of gas    See Answer
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