A single phase transformer with 50 kVA, 2400V/240V, 50 Hz; Idle operating voltage 2400V, idle current is 0.2A and idling power is 180W. Short circuit operating voltage It is 55V, the short-circuit current is 20.83A, and the short-circuit power is 620W. According to this; a) Calculate the equivalent winding resistance reduced to primary, equivalent winding reactance and equivalent winding impedance. b) Calculate the magnetization reactance and core loss resistance. c) Copper and iron (core) losses for operation at 0.95 (reverse) power factor at half load. Find and calculate the efficiency of the transformer.
A single phase transformer with 50 kVA, 2400V/240V, 50 Hz; Idle operating voltage 2400V, idle current is 0.2A and idling power is 180W. Short circuit operating voltage It is 55V, the short-circuit current is 20.83A, and the short-circuit power is 620W. According to this; a) Calculate the equivalent winding resistance reduced to primary, equivalent winding reactance and equivalent winding impedance. b) Calculate the magnetization reactance and core loss resistance. c) Copper and iron (core) losses for operation at 0.95 (reverse) power factor at half load. Find and calculate the efficiency of the transformer.
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 3.27P: A three-phase transformer is rated 1000MVA,220Y/22kV. The Y-equivalent short-circuit impedance,...
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A single phase transformer with 50 kVA, 2400V/240V, 50 Hz; Idle operating voltage 2400V, idle current is 0.2A and idling power is 180W. Short circuit operating voltage It is 55V, the short-circuit current is 20.83A, and the short-circuit power is 620W. According to this;
a) Calculate the equivalent winding resistance reduced to primary, equivalent winding reactance and equivalent winding impedance.
b) Calculate the magnetization reactance and core loss resistance.
c) Copper and iron (core) losses for operation at 0.95 (reverse) power factor at half load. Find and calculate the efficiency of the transformer.
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