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.
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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
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