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What is the dielectric strength of porcelain insulators?(a) 60 kV/cm(b) 140 kV/cm(c) 50 kV/cm(d) 40 kV/cmThis question was posed to me in an interview for job.Question is from Insulating Materials topic in portion Electrical Engineering Materials of Design of Electrical Machines

Answer»

The CORRECT OPTION is (a) 60 kV/cm

Easy EXPLANATION: Porcelain has a dielectric strength of 60kV/cm. 140 kV/cm denotes the dielectric strength of glass insulator.



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