A 400V/100V, 10 kVA two-winding transformer is reconnected as an autotransformer across a suitable voltage source. The maximum rating of such an arrangement could be

A 10 kVA, 400 V/200 V single-phase transformers with 10% impedance draws a steady short circuit line current of

The following starting method for an induction motor is inferior view of the poor starting torque per ampere of the line current drawn:

Starting torque can be obtained in the case of a single phase induction motor with identical main and auxiliary windings by connecting