Question

What is the relation between the overload capacity and dispersion coefficient?

(a) overload capacity is directly proportional to the dispersion coefficient

(b) overload capacity is indirectly proportional to the dispersion coefficient

(c) overload capacity is directly proportional to the square of the dispersion coefficient

(d) overload capacity is indirectly proportional to the square of the dispersion coefficient

The question was asked in final exam.

The doubt is from Dispersion Coefficient in chapter Three Phase Induction Motor of Design of Electrical Machines

Answer 1

The correct answer is (b) overload capacity is indirectly proportional to the dispersion coefficient

The explanation is: Overload capacity is indirectly proportional to the dispersion coefficient. The overload capacity of induction motors decreases with an increase in the dispersion coefficient.