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phase sequence is ABC.

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Explain the role of synchronous condensers in improving power factor with
phasor diagram.
Derive the ABCD constants of nominal configuration in transmission lines
with necessary figures.
PART C
Answer any two full questions, each carries 10 marks.
“The disc nearest to the conductor has maximum voltage drop across it.” Prove

for a 3 disc suspension string insulator with neat figure.

Illustrate the configuration of ACSR conductors and list its main features.
Derive maximum and minimum dielectric stress for a single core cable with
neat figure.

Explain the different types of DC links with neat figures.

A transmission line has a span of 375m between level supports. The conductor
has an effective diameter of 1.96cm and weighs 0.865kg/m. Its ultimate
strength is 6000kg. If the conductor has ice coating of radial thickness 1.27cm
and is subjected to a wind pressure of 3.9gm/cm’nof projected area, calculate
sag for a safety factor of 2. Weight of Icc of ice is 0.91gm.

Explain any four factors affecting corona.

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