4. Asingle-core lead covered cable is to be designed for 66 kV to earth. Its conductor diameter is 2 cm and its three insulating materials have permittivities of 5, 4 and 3 respectively with the corresponding maxi- mum safe working stress of 38 kV/cm (r.m.s.), 26 kV/cm. (r.m.s.) and 20 kV/cm (rm.s.) respectively. Find the minimum diameter of lead sheath. [8-3 cm]

4. Asingle-core lead covered cable is to be designed for 66 kV to earth. Its conductor diameter is 2 cm and its three insulating materials have permittivities of 5, 4 and 3 respectively with the corresponding maxi- mum safe working stress of 38 kV/cm (r.m.s.), 26 kV/cm. (r.m.s.) and 20 kV/cm (rm.s.) respectively. Find the minimum diameter of lead sheath. [8-3 cm]

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.1P: The Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft at 20C...

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