Question

A 10 kva 1100/400 volt 50 hz single phase transformer has 100 turns on the secondary winding. What is number of turns primary winding

Answer 1

Answer:

N1=100/400*1100

=0.22*1100

= 275 turns

Answer 2

Answer:

The number of turns primary winding is 275 turns.

Explanation:

let, number of turns primary winding be Np

     number of turns secondary winding  be Ns

     voltage of primary winding be V p

     voltage of secondary winding be Vs

here, V p/Vs=1100/400

        Ns = 100

we know, V p/Vs = Np/Ns

               Np = V p/Vs*Ns

               Np = 1100/400*100

               Np = 275