VsIsRcwwwRw JXLwwwjXMILwwwRLA 140/32 V, 950 VA, 50 Hz single-phase transformer gave the following test results:Open circuit test on LV side: Ioc=5.05 A, Poc = 134 WShort circuit test on HV side: Vsc = 25 V, Psc = 92 WA 22 load is connected to the LV side with rated voltage on the HV side. EfficiencyCalculate the losses in the transformer:PlossWWhat is the efficiency?n=%• Use Complex Numbers throughout.• Use Power Equations to get losses in Rc and Rw. Add these to get total Ploss.• Calculate input power Ps and output power PL to get efficiency, n.

Voltage rating of transformer :140/32 V V1=140 V V2=32 V Power rating, S= 950 VA frequency, f=50 Hz…

A 140/32 V, 950 VA, 50 Hz single-phase transformer gave the following test results: Open circuit test on LV side: Ioc=5.05 A, Poc = 134 W Short circuit test on HV side: Vsc = 25 V, Psc = 92 W A 22 load is connected to the LV side with rated voltage on the HV side.

A 140/32 V, 950 VA, 50 Hz single-phase transformer gave the following test results: Open circuit test on LV side: Ioc=5.05 A, Poc = 134 W Short circuit test on HV side: Vsc = 25 V, Psc = 92 W A 22 load is connected to the LV side with rated voltage on the HV side.

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 3.10P: A single-phase step-down transformer is rated 13MVA,66kV/11.5kV. With the 11.5 kV winding...

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Concept explainers

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.

Question

Vs
Is
Rc
www
Rw JXL
www
jXM
IL
www
RL
A 140/32 V, 950 VA, 50 Hz single-phase transformer gave the following test results:
Open circuit test on LV side: Ioc=5.05 A, Poc = 134 W
Short circuit test on HV side: Vsc = 25 V, Psc = 92 W
A 22 load is connected to the LV side with rated voltage on the HV side.

Efficiency
Calculate the losses in the transformer:
Ploss
W
What is the efficiency?
n=
%
• Use Complex Numbers throughout.
• Use Power Equations to get losses in Rc and Rw. Add these to get total Ploss.
• Calculate input power Ps and output power PL to get efficiency, n.

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Step 2: Losses from open and short circuit test

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Step 3: equivalent ciruit refered to primary

Step 4: Total losses

Step 5: Efficiency:

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