Question

A peaky voltage supply is given to the 3 phase power transformer of the connection power system. These results in _________

(a) reduction in iron losses

(b) reduction in copper losses

(c) increase in iron losses

(d) reduction in noise

The question was posed to me at a job interview.

My doubt is from Losses and Efficiency in chapter Rating and Loss Dissipation of Electrical Machines

Answer 1

Correct choice is (a) reduction in iron losses

To elaborate: The flux wave will be sinusoidal in nature as the emf is peaky in nature. Sine wave has least losses when compared to other wave forms.