11

12

13

14

15

16

a)

b)

a)
b)

a)
b)

a)

b)

a)

b)

a)

03000EE301092001

to 0.9 lagging. Simultaneously the motor carries a load of 100 kW. Find (1) the
leading KVAR taken by the motor (2) KVA rating of the motor and pf at which
the motor operates.
With the help of block diagrams explain the working of a solar power plant and
a wind power plant.
Derive the capacitance of a single phase transmission line, considering the
effect of earth.
PART (^

Answer any two full questions, each carries 10 marks.

Explain the configuration of FC+ TCR.

A single core cable has a conductor radius 2 cm and inside sheath radius 4 cm.
It is provided with one inter heath so that limits of maximum and minimum
electric stresses is the same in the two layers of dielectric. The system voltage
is 66kV, 3 phase.
Find (a) the radius of inter sheath and its voltage (b) the ratio of maximum
electric stress with and without inter sheath.
Explain the power transfer equations in ac transmission and dc transmission.
A string of 5 suspension insulators is to be graded for obtaining uniform
voltage distribution across the string. If the pin to earth capacitance are all
equal to C and the mutual capacitance of the top insulator is 10 C, find the
mutual capacitance of each unit in terms of C.
Classify the types of HVDC links and explain the construction and working of
each type with the help of necessary diagrams.
Assuming that the shape of an over head line can be approximated by a
parabola, derive the expression for sag. How the effect of wind and ice loadings
can be taken into account.
PART 0

Answer any two full questions, each carries 10 marks.
Compare the arc rupture in oil and air blast circuit breakers and summarize the
relative advantages and disadvantages of these types of switch gears.
With the help of a neat diagram explain the Buchholz's protection for
transformers.
Explain how an amplitude comparator can be converted to a phase comparator

and vice versa.

Page 2 of 3

(5)

(5)

(5)
(5)

(5)
(5)

(5)

(5)

(5)

(5)

(5)