Question

For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the rated voltage on the other winding?

(a) Yes

(b) No

Short answer

Therefore, the correct option is (b) No

Step-by-step solution

Define the formulas of primary and secondary winding induced voltage.

Write the formula of induced voltage across primary and secondary winding.

$\frac{E_2}{E_1}=\frac{N_2}{N_1}$ ……. (1)

Here, $E_2$ is induced voltage across secondary winding, role="math" localid="1655962503304" $E_1$ is induced voltage across primary winding, $N_2$ is number of turns in the secondary winding and $N_1$ is number of turns in the primary winding.

Explain the short-circuit test.

The short-circuit test is applied on the load to calculate the primary and secondary winding resistances and leakage reactances.

According to the question, the winding is shorted to perform the short-circuit test. The winding will be damaged if the rated voltage is applied to the other winding. This is because a short circuit parth will draw a large amount of current and will heat the core, thus damging the core and the winding.

Hence, the rated voltage should not be applied to the other winding if one is shorted.

Therefore, option (b) Yes is No