Question

What is the formula for the window clearance of the transformer?

(a) window clearance = (height of the window + axial depth)/2

(b) window clearance = (height of the window – axial depth)

(c) window clearance = (height of the window – axial depth)/2

(d) window clearance = (height of the window + axial depth)

I had been asked this question in homework.

The doubt is from Overall Dimensions topic in portion Design of Transformers of Design of Electrical Machines

Answer 1

Correct answer is (c) window clearance = (height of the window – axial depth)/2

The best explanation: First the height of the window is obtained. Then the axial depth is calculated using the formula axial depth = number of secondary turns * width of the conductor and substituting in the above formula provides the window clearance.