Transformer

A single phase transformer has the following rating: 120 kVA, 2000 V/100 V, 60 Hz with 1000 primary turns. Determine: (a) the secondary turns (b) the rated primary and secondary currents (c) the maximum flux (d) given a maximum flux density of 0.25 T, the cross-sectional area of the core.

Single phase transformer, 120kVA, 2000V/100V, primary turns, that is, N1 = 1000

(a) N2/N1= V2/V1

(b) Rated primary current = 120*1000/V1

(c) V1 = 4.44fΦmN1

(d) Bm = 0.25T