A transformer is to be designed to increase the 30 kV (rms)output of a generator to the transmission line voltage of 345 kV (rms).If the primary winding has 60 turns,how many turns must the secondary have?
A) 57
B) 6900
C) 690
D) 11

Question

Quizplus · Accepted Answer

The turn ratio of the transformer can be calculated as follows:
turns ratio = V2/V1
where V2 = 345 kV and V1 = 30 kV
turns ratio = 345/30 = 11.5
Since the primary winding has 60 turns, the secondary winding must have:
Secondary turns = turns ratio * primary turns
Secondary turns = 11.5 * 60 = 690
Therefore, the correct answer is C) 690.

A Transformer Is to Be Designed to Increase the 30