Electrical Engineering - Transformers - Discussion

In power transformer primary side low voltage and high current so that's why fuse for protection and fuse is also rating is AMP.

But we know that we don't use fuse for power t/f we use circuit breakers (switch).

The Correct option is D, fused.

When the secondary load is overloaded, it draws maximum current in the primary side due to which damaging the primary side as well as appliances. Therefore primary winding of power transformer is fused. Suppose peak voltage of power source is varying then current will also fluctuate so also to limit the current it is fused.

When the secondary load is overloaded, it draws maximum current in the primary side due to which can damage the primary side as well as appliances. Therefore, primary winding of the power transformer is fused.