Power Systems

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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?

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

The approximate cost ratio of a 220 kv, underground cable transmission and 220kv/ O/H transmission is

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

Guy wire is employed for

In a transmission system the feeder supplies power to

A dc line carries

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

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

A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance per phase of the capacitor in micro-farads is

The main criterion for selection of the size of a distribution for a radial distribution system is

A conductor is composed of seven identical copper .Iranu, each having a radius r. The self GMD of the conductors will be

A voltage of 1000 kV is applied to an overhead line with its receiving end open. If the surge impedance of the line is 500 ohm, then the total surge power in the line is

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

Distributers are designed from the point of view of

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

For certain geometry and operating voltage of the uncompensated transmission line, the ratio of power transfer capability to the surge inpedance loading with increase in length

58)Bulk power transmission over long HVDC lines are preferred on account of

A single phaae transmisson line of impedance j 0.8 ohm supplies a resistive load of 500 A at 300 V. The sending end power factor is

Transposition of transmission line is done to

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