Question

A 100 KVA transformer is operating at 60 Hz, 240 V supply. The same
transformer is operating at 50 Hz, 200 V supply. The new rating is​

Answer 1

Answer:

Good Question

Explanation:

Answer 2

Given:

KVA$_{1}$ (initial rating) = 100KVA$_{1}$

initial frequency(f1) = 60Hz

initial voltage(V1) = 240V

final frequency(f2) = 50Hz

final voltage(V2) = 200V

To Find:

new rating(KVA$_{2}$)=?

Solution:

we know that the operating constraint for the working of a transformer is

$\dfrac{V1}{f1} = \dfrac{V2}{f2}$

$\dfrac{KVA1}{f1} = \dfrac{KVA2}{f2}$

$KVA = \dfrac{KVA1 \times f2}{f1}$

$= \dfrac{100 \times 10^{3}\times 50 }{60}$

= 83.33 KVA

Thus, the new rating is 83.33 KVA