(a) Derive a formula for the electric stress in a single core cable.…
Previous year question for Power System-II.
Question
(a) Derive a formula for the electric stress in a single core cable. Where is the stress maximum? Where is it minimum? (10)
(b) A single core cable for $66\text{ kV}$ 3-phase system has a conductor of $2\text{ cm}$ diameter and sheath of inside diameter $5.3\text{ cm}$. It is required to have two inter sheaths so that stress varies between the same maximum and minimum values in the three layers of dielectric. Find the positions of inter sheaths, maximum and minimum stress and voltages on the inter sheaths. Also find the maximum and the minimum stress if the inter sheaths are not used. (10)
- Year: 2018
- Subject: Power System-II