Question
Discuss the variation in dielectric strength variation with altitude. How would the ground clearances or Rod gaps be altered as compared to sea level in a 33/11 KV substation at high altitude.
Answer :
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The design of an electrical power system is affected by the altitude of the system. Many of the standards indicate that an electrical device will operate satisfactorily at elevations between sea level and 1000 m. Usually, a derating is applied on equipment operated above 1000
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