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A small town with a demand of 800 kW of ...

A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two wire line carrying power is `0.5 Omega` per km. The town gets power from the line through a 4000-220 V step down transformer at a substation in the town . The line power loss in the form of heat is

A

400 kW

B

600 kW

C

300kW

D

800kW

Text Solution

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The correct Answer is:
B
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A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two line wires carrying power is 0.5 Omega per km. The town gets power from the lines through a 4000-220 V step down transformer at a substation in the town. Estimate the line power loss in the form of heat. (b) How much power must the plant supply. assuming there is negligible power loss due to leakage? (c) Characterize the step up transformer at the plant.

A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two line wires carrying power is 0.5 Omega per km. The town gets power from the lines through a 4000-220 V step down transformer at a substation in the town. (a) Estimate the line power loss in the form of heat. (b) How much power must the plant supply. assuming there is negligible power loss due to leakage? (c) Characterize the step up transformer at the plant.

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