Question

Problem 4 This problem has 3 parts.

The power company wants to deliver electrical service of 110 volts plus or minus 5 yolts (105 to 115 volts), at 60 hertz frequency across a 10 kilometer transmission ine to a smal town. The transmission line voltage is 4,000 volts. There is a transformer availablo with a primary col of 15,000 turns and secondary coits of 82, 132, 164 and 187 turns.

part a- Which, if any, of the secondary coils can be used to deliver the power within the 105 to 115 voll range, include your calculations.

part b- If a transformer is used that delivers an exact 110 volts, and the town requires peak (maximum) of 800 kilowatts of power, how much current will flow through the 10 kilometer transmission line during the peak.

part c- Is a transformer has a secondary coll of 220 turns, how many turns are needed on the primary coil to get the 110 volts with an error of less than 1 percent?

Answer 1