Question

What is the formula for the height and width of the single phase shell transformer?

(a) width = 2*width of the window + 4*width of the largest stamping, height = height of the window + 2*width of the largest stamping

(b) width = 2*width of the window – 4*width of the largest stamping, height = height of the window + 2*width of the largest stamping

(c) width = 2*width of the window + 4*width of the largest stamping, height = height of the window – 2*width of the largest stamping

(d) width = 2*width of the window – 4*width of the largest stamping, height = height of the window -2*width of the largest stamping

I have been asked this question in examination.

Question is from Overall Dimensions topic in division Design of Transformers of Design of Electrical Machines

Answer 1

The correct choice is (a) width = 2*width of the window + 4*width of the largest stamping, height = height of the window + 2*width of the largest stamping

For explanation I would say: First the width of the window is obtained. Next, the height of the window is obtained. Then, the width of the largest stamping is obtained and substituted in the above formula.