Question

The sc test data on a 10kva ,2300/230v single-phase transformer are as follows: 90v,4.3a, 290w. if the low voltage side is delivering 85% of rated load at 0.8 pf lag, and at 230v, find

(a) the corresponding voltage applied on the high voltage side.

Answer 1

The corresponding voltage applied on the high voltage side of the transformer is 900V.

Step-by-step explanation:

To find the corresponding voltage applied on the high voltage side, we need to use the turns ratio of the transformer. The turns ratio is equal to the ratio of the number of turns on the high voltage side to the number of turns on the low voltage side.

Since the transformer is single-phase, the turns ratio is equal to the voltage ratio.

In this case, the voltage ratio is 2300V / 230V = 10.

Therefore, the corresponding voltage applied on the high voltage side is 10 times the low voltage, which is 10 x 90V = 900V.