A 5,000-kVA, 3-phase transformer, 13.2/33-kV, A/Y, has a copper loss of 11 kW. The impedance drop at full-load is 7.5%. Calculate the primary voltage when a load of 4000 kW at 0.8 p.f. is delivered at 33 kv.

A 5,000-kVA, 3-phase transformer, 13.2/33-kV, A/Y, has a copper loss of 11 kW. The impedance drop at full-load is 7.5%. Calculate the primary voltage when a load of 4000 kW at 0.8 p.f. is delivered at 33 kv.

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 3.4P: A single-phase 100-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down...

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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

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Step 2: Calculations to find the value of secondary current.

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Step 3: Calculations to find the value of secondary voltage.

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Step 4: Calculations to find the value of Primary Current.

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Step 5: Calculations to find the value of Copper loss in the Primary Winding.

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Step 6: Calculations to find the value of Primary Voltage.

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