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A single-phase transformer of 100 KVA, 60 Hz, 12000/240 V, the respective tests are carried out: -Open Circuit (high side open) Voltage (v): 240 Current (A): 8.75 Power (W): 980 -Short Circuit (Low side shorted) Voltage (v): 600 Current (A): 8.3 Power (W): 1200 a) Draw the equivalent circuit of the transformer referred to the high voltage side with the respective values of its elements b) Voltage regulation for a power factor of 0.8(-) c) The efficiency when it is working at 75% of its full load and power factor of 0.8(-).

A single-phase transformer of 100 KVA, 60 Hz, 12000/240 V, the respective tests are carried out: -Open Circuit (high side open) Voltage (v): 240 Current (A): 8.75 Power (W): 980 -Short Circuit (Low side shorted) Voltage (v): 600 Current (A): 8.3 Power (W): 1200 a) Draw the equivalent circuit of the transformer referred to the high voltage side with the respective values of its elements b) Voltage regulation for a power factor of 0.8(-) c) The efficiency when it is working at 75% of its full load and power factor of 0.8(-).

Power System Analysis and Design (MindTap Course List)
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 3.57P: A two-winding single-phase transformer rated 60kVA,240/1200V,60Hz, has an efficiency of 0.96 when...
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A single-phase transformer of 100 KVA, 60 Hz, 12000/240 V, the respective tests are carried out:

-Open Circuit (high side open)
Voltage (v): 240
Current (A): 8.75
Power (W): 980

-Short Circuit (Low side shorted)
Voltage (v): 600
Current (A): 8.3
Power (W): 1200

a) Draw the equivalent circuit of the transformer referred to the high voltage side with the respective values of its elements
b) Voltage regulation for a power factor of 0.8(-)
c) The efficiency when it is working at 75% of its full load and power factor of 0.8(-).   

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