The efficiency of a 1000kVA, 110/220V, 50Hz single phase transformer is 98.5% at a half load 0.8 p.f and 98.8 % at full-load unity power factor. The voltage regulation is 10% at full-load 0.707 p.f. lag. Determine 1- The efficiency at 80% load and 0.6 p.f. 2- The maximum efficiency. 3- The secondary terminal voltage when delivering 500kW at 0.8 p.f. lag
The efficiency of a 1000kVA, 110/220V, 50Hz single phase transformer is 98.5% at a half load 0.8 p.f and 98.8 % at full-load unity power factor. The voltage regulation is 10% at full-load 0.707 p.f. lag. Determine 1- The efficiency at 80% load and 0.6 p.f. 2- The maximum efficiency. 3- The secondary terminal voltage when delivering 500kW at 0.8 p.f. lag
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.63P: A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a...
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