Power Systems

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Insulation coordination for UHV lines (above 500 kv) is done based on

ACSR is used in place of copper in overhead lines because of

The material used for the manufacture of ground wire is

Series capacitor is used in a transmission line to

If 3 MW power is to be transmitted over a distance of 30km, the desired transmission voltage will be

Extra high voltage transmission means

Distributers are designed from the point of view of

A 100 km long transmission line is loaded at 110 kV.if the loss of line is 5 MW and the load is 150 MVA, the resistance of the line is

The most accurate and versatile method of achieving reactive power compensation is by using

A 60 Hz, 320 km lossless line has sending end voltage 1.0 p.u, The receiving end voltage on no load is

What is the maximum value of a load which consume 500 KWh per day at a load factor of 0.40, if the consumer increases the load factor of 0.50 without increasing the maximum demand?

The rated voltage of a 3-ph power system is given as

A 3-ph, 4-wire system is commonly used for

In HV transmission, the spacing between sub-conductors of a bundle is approximately

By increasing the transmission voltage double of its original value, the same power can be despatched keeping the line loss

A three phase 50 Hz line consists of three conductors each of diameter 21 mm, The spacing between the conductors all follows: A – B = 3m, B – C = 5m, C – A = 3.6m If the line operates at 132 k V, the reactive voltampere generatd by the line per km is

Hollow conductors are used in transmission lines to

The conductor of a 10 km long, single phase, two wire line are separated by a distance of 1.5 m. The diameter of each conductor is 1 cm, If the conductors are of copper, the inductance of the circuit is

Which of the following distribution systems is preferred for good efficiency and high economy

For high-voltage transmission lines, conductors are suspended from towers so as to


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