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E1108 Pages: 3

sides are 8m. Each conductor is of radius 0.3cm.

A generating station has the following maximum loads: 16000kW, 12000kW,
10000kW, 7000kW and 800kW. The annual load factor is 50%. Calculate the
diversity factor and annual energy consumption if the maximum demand on
the station is noted as 24000kW.

A 3-phase 500-HP 50112, 1111۷ star connected induction motor has a full load
efficiency of 85% and a lagging p.f. of 0.8. It is connected to a feeder and it is
desired to correct the p.f. to 0.95 lagging. Determine :

(i) The Capacitor bank rating in kVAR and

(ii) The capacitance of each unit if the units are connected in Star.

Derive the Capacitance of a single phase overhead transmission line
considering the effect of earth.

PART C
Answer any two full questions, each carries10 marks.

Following results are obtained by making experiments on three phase, three
core metal sheathed cable:

(a) Capacitance between all the three bunched conductors and sheath is 1.2
micro Farad.

(b) Capacitance between any one conductor and sheath and the other two being
insulated is 0.8 micro Farad.

Calculate the capacitance (C) between any two conductors when the third
conductor is connected to the sheath.

A transmission line conductor at a river crossing is supported from two towers
at a height of 45m and 75m above the water level. The span length is 300m.
Weight of the conductor is 0.85kg/m. Determine the clearance between the
conductor and water at a point midway between towers if the tension in the
conductor is 2050kg.

What is the expansion of FACTS? What are the devices used as FACTS
devices? Why are they significant in the present scenario?

A three phase overhead transmission line is supported by three disc suspension
insulators. The potentials across the first and second insulator are 9kV and

12kV respectively. Find out:

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