a) Explain the demerits of non-uniform potential gradient of insulated cable. b) Insulation resistance varies proportionally with the value of insulation thickness'- justify this statement with appropriate equations. c) A single core cable to be used on a 50kV single phase system. Maximum permissible dielectric is not to exceed 35KV/cm (peak). I. Determine the most economic conductor and cable diameter. II. Estimate voltages on the inter sheaths, if two inter sheaths are introduced to increase 32% of the existing working voltage of the cable using the method of 'inter sheath grading

a) Explain the demerits of non-uniform potential gradient of insulated cable. b) Insulation resistance varies proportionally with the value of insulation thickness'- justify this statement with appropriate equations. c) A single core cable to be used on a 50kV single phase system. Maximum permissible dielectric is not to exceed 35KV/cm (peak). I. Determine the most economic conductor and cable diameter. II. Estimate voltages on the inter sheaths, if two inter sheaths are introduced to increase 32% of the existing working voltage of the cable using the method of 'inter sheath grading

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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Question

a) Explain the demerits of non-uniform potential gradient of insulated cable.
b) 'Insulation resistance varies proportionally with the value of insulation thickness - justify this
statement with appropriate equations.
c) A single core cable to be used on a 50kV single phase system. Maximum permissible dielectric
is not to exceed 35kV/cm (peak).
I.
Determine the most economic conductor and cable diameter.
II.
Estimate voltages on the inter sheaths, if two inter sheaths are introduced to increase
32% of the existing working voltage of the cable using the method of 'inter sheath
grading

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