Question

What should be done in order to reduce the errors in the core?

(a) armature mmf is to kept low

(b) field mmf to be kept high

(c) the exciting mmf is to be kept low

(d) the field mmf is to be kept high

This question was addressed to me by my college professor while I was bunking the class.

I want to ask this question from Design Principles topic in section Design of Current Transformers (CT) of Design of Electrical Machines

Answer 1

The correct answer is (c) the exciting mmf is to be kept low

The explanation: The errors in the core are reduced by keeping the exciting mmf low. This can take place with the core having a low reluctance and low iron loss.