A two-winding single-phase transformer rated 60 k V A , 240 / 1200 V , 60 H
Question:
A two-winding single-phase transformer rated 60kVA,240/1200 V,60 Hz, has an efficiency of 0.96 when operated at rated load, 0.8 power factor lagging. This transformer is to be utilized as a 1440/1200-V step-down autotransformer in a power distribution system.
(a) Find the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the ratings as a two-winding transformer. Assume an ideal transformer.
(b) Determine the efficiency of the autotransformer with the kVA loading of part (a) and 0.8 power factor leading.
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Related Book For 
Power System Analysis And Design
ISBN: 9781305632134
6th Edition
Authors: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
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