A single-phase 10 kVA, 2200 V/220 V transformer operates at unity power factor.
PHYSICS · Multi-part · CBSE · Physics · Alternating Current · Alternating Current
Problem
A single-phase 10 kVA, 2200 V/220 V transformer operates at unity power factor.
(i) When supplying full-load current the copper loss is 150 W and the iron loss is 100 W. Calculate the full-load efficiency.
(ii) If the same transformer supplies half of its rated kVA at the same power factor, determine its efficiency at that load.