Question

A low value of transformer leakage reactance is desired to minimize the voltage drop, but a high value is desired to limit the fault current, thereby leading to a compromise in the design specification.

(a) True

(b) False

Short answer

Answer

Therefore, the correct option is (a) True

Step-by-step solution

Check statement for low value of leakage reactance.

The resistance and reactance in a transformer leads to a voltage drop.

Also, with large value of reactance, the heat dissipation in transformer increases, which in turn increases the costing of cooling system.

The cooling system increases the size of the whole system.

Therefore, transformer with low leakage reactance is needed.

Check statement for high value of leakage reactance.

Because of low value of leakage reactance, the power loss decreases, but it decreases the resistance to flow of current.

The high value of fault current damages the transformer, hence reactance with large value is needed. For this, manufacturer has to compromise with design specifications.

Therefore, the correct option is (a) True.