The following test results of a single-phase step-down transformer which were measured at primary side: Open Circuit Test: Voc= 415V; loc= 0.22A; Poc= 7.64W; Vo=240V Short Circuit Test: Vsc= 25.2V; Isc= 18.07A; Psc= 142.43W 7. An inductive load was then connected to the step down transformer and recorded that the full load output current Is = 31.25A. Determine: a. Equivalent resistance of the transformer referred to the primary circuit Req and equivalent reactance of the transformer referred to the

The following test results of a single-phase step-down transformer which were measured at primary side: Open Circuit Test: Voc= 415V; loc= 0.22A; Poc= 7.64W; Vo=240V Short Circuit Test: Vsc= 25.2V; Isc= 18.07A; Psc= 142.43W 7. An inductive load was then connected to the step down transformer and recorded that the full load output current Is = 31.25A. Determine: a. Equivalent resistance of the transformer referred to the primary circuit Req and equivalent reactance of the transformer referred to the

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Related questions

Q: 1. If a 0.6 accuracy class current transformer has a phase angle of + 10 at 100% rated current, the…

A: Ans.(1). Value of 'β=10'

Q: Question- For a single phase 440/110 V transformer having input on primary side at no load is 100 W.…

Q: Ql-phase step down transformer 1250 KVA, 110002200 V, 50 Hz. The resistance iphase and leakage…

Q: The circuit for a 20-KVA, 220/3960 V, 50-Hz transformer is shown in Figure (1). The open- circuit…

Q: During routine tests of a three phase transformer, measurements of DC resistance between winding…

A: During Routine tests of Three phase Transformers ,Measurement of DC Resistance between winding…

Q: Find the elements of the equivalent circuit relative to the secondary of a single-phase transformer.…

A: Transformer is the static device it work on the principle of faraday law of mutual inductance. It…

Q: A 800/160V, 55 HZ, 1-phase transformer with cross sectional area of the core is 26 cm? and maximum…

Q: The primary winding of a transformer connected to 2,200 volts circuit consists of two coils which…

Q: A 2400/240 V, 200 kVA, single phase transformer has a core loss of 1.8 kW at rated voltage. Its…

A: A 2400/240 V, 200 kVA Single phase transformer- Core loss Pe=1.8 kW, Equivalent resistance Reqv=1.1%…

Q: A single phase transformer with the maximum value of flux 0.0991wb and an effective cross sectional…

Q: 2-6. A 1000-VA, 230/115-V transformer has been tested to determine its equivalent cir- cuit. The…

A: Transformer of 1000 VA,230/115-v

Q: What are the conditions for the parallel operation of 1-phase transformers

A: In this question, We need to the conditions for the parallel operation of 1-phase transformers?…

Q: How to generate 480V three phase 400Hz ac from 230V three phase 60Hz ac source? (Please specify the…

Q: What conclusions you can come up with after implementing open circuit test on single phase…

A: Conclusions from open circuit test on single phase transformer

Q: The idle operating current of the three-phase transformer connected to Yy0 (Y-Y) with a power of…

A: Given transformer with rating 6300 KVA and 15/0.4 KV The no load current I0=2.91No load active power…

Q: What are the uses of three-phase transformers?

A: In this question, We need to determine the uses of three phase transformer. We know Three phase…

Q: If you have 3-phase power and you need to step down (or up) in 3-phase voltage, how many…

A: The objective of the question is to determine the number of single-phase transformers required to…

Q: A 400/200 volts transformer has pu impedance of 0.05. The HV side voltage required to circulate full…

A: Turns ratio 400/200 i.e. Base voltage for HV, VHV(base)= 400 V Base voltage for LV, VLV(base) = 200…

Q: The core loss of a single phase, 230/115 V, 50Hz power transformer is measured from 230 V side by…

A: Given- 230/115 V, 50 Hz power transformer, Core loss=1050 W, for 230 V, 50 Hz input, Core loss=500…

Q: A 3000V/4400V, single-phase transformer takes a no-load current of 0.5A and the iron loss is 200W.…

A: We will solve this question by using the no-loaad conditions of the transformer.

Q: What is the advantages and disadvantages fot testing transformer?

A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…

Q: The values of a phase measured from the no-load (no load) operation and short circuit test of a…

Q: A 15-KVA, 2400/240-V transformer is to be tested to determine its excitation branch components, its…

A: The rated KVA of the transformer, S=15 KVA The voltage ratio, 2400/240 V, Results of open circuit…

Q: Ql-phase step down transformer 1250 KVA, 1 1000/2200 V, 50 Hz .The resistance /phase and leakage…

Q: Detailed description of open circuit test on single phase transformer

A: In this question we discuss about open circuit test of transformer .

Q: How is the EMF of a three phase transformer

A: TRANSFORMER: The transformer transfers power from one circuit to another circuit without a change…

Q: A 22.5-kVA single-phase transformer is tested with a true-RMS ammeter and an ammeter that indicates…

A: Given data:Transformer capacity =22.5True-RMS reading =94APeak reading =204A

Q: draw a three-phase transformer equivalent circuit and also explain how formulas were derived

A: This is a 3 phase transformer equ6 circuit.

Q: 1. Explain why transformer saturation occurs at a lower voltage value when the frequency of the ac…

Q: of the core is 30 cm² and maximum flux density is 1.3 Wb/m² , then the number of turns in primary…

Q: 6. 150 kVA, 2800-240 V, 50 Hz transformer. Reg.Ls = 0.0082N , Xeq.Ls = 0.02230 Step down transformer…

A: Note: We are authorized to answer three subparts at a time since you have not mentioned which part…

Q: A 150 kVA, 2500/250 V, 50 Hz, single phase transformer has a no-load current of 0.75 A and a core…

Q: Single phase half wave AC-AC converter has a resistance of R = 50 ohms. Input voltage is given as…

A: Given in the question: Load resistance: RL = 50 Ohms Input voltage, V = 230V Firing angle, α=600…

Q: In no load phasor diagram of practical transformer, the magnetizing current is with primary voltage…

Q: DC 200 V was applied to the primary of a transformer with a conversion ratio of 1/5. Obtained from…

Q: A three-phase two winding transformer is rated 1200MVA, 24/345kV 50Hz. It has a leakage reactance of…

A: PU Kva = Actual KVA / Base KVA PU Voltage = Actual Voltage/ Base voltage In star connection, N1/N2…

Q: Draw the phasor diagram of a single phase transformer circuit.

A: As we take 1 phase Transformer with exact equivalent circuit and we have draw the phasor diagram by…

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

7.
The following test results of a single-phase step-down transformer
which were measured at primary side:
Open Circuit Test: Voc= 415V; loc= 0.22A; Poc= 7.64W; Vo=240V
Short Circuit Test: Vsc= 25.2V; Isc= 18.07A; Psc= 142.43W
An inductive load was then connected to the step down transformer
and recorded that the full load output current Is 31.25A.
Determine:
a. Equivalent resistance of the transformer referred to the primary circuit
Req and equivalent reactance of the transformer referred to the
primary circuit Xeq,
b. Transformer core loss resistance Re and inductor core loss Xm,
c. Percent Voltage Regulation V.R. of the transformer when delivering
full load power 5700W at power factor 0.8 lagging.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step by step

Solved in 6 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

10
What are the objectives of implementing an open circuit test on single phase transformer?
What are the advantages and disadvantages of back to back test on two similar single phase transformer?
Draw the general diagram of a single-phase transformer and briefly show how it works.
Solve it...
Find the elements of the equivalent circuit relative to the secondary of a single-phase transformer. The no- load voltages in the primary and secondary circuit are 200 and 400 volts, respectively, and at a frequency of 50 Hz. The primary no-load current at a voltage of 200 volts is 0.7 amps and the losses in the core are 70 watts. The resistance and reactance of the primary are 3.2 and 1.25 ohms, respectively. Secondary resistance and reactance 6. 0, 0.07 ohms, respectively. Draw the equivalent circle, showing the values of its elements.
Centage resistance and percentage reactance of a transformer are 1% and 4%, respectively. What is voltage regulation at power factor 0.8 lagging and 0.8 leading?
formula for determining the power of a single-phase transformer
VOLTAGE STEP UP THE VOLTAGE TRANSFORMER Done Choose... STEP UP THE CURRENT STEP UP THE VOLTAGE FREQUENCY PHASE DIFFERENCE
Draw a block diagram of a power supply from transformer up to regulator with corresponding waveform.
A Cock-croft Walton type voltage multiplier has 7 stages with capacitance all equal 0.07pF. The supply a frequency of to be supplied is 6.5mA. to transformer secondary voltage is 133kV at 250HZ. If the load current The total voltage ripple of the system is: (a) 15.3kv (b) 12.2kv (c) 9.1kV (d) 10.4kv (e) 1.9kv a. d O b. a OC C O d. e O e. b
Ql-phase step down transformer 1250 KVA, 10002200 V, 50 Hz The resistance /phase and leakage reactanceiphase of the primary winding are 0.78 2 and 4.82 and the corresponding values for the secondary winding are 0.012 and 0.002 respectively if the primary winding is connected in delta and secondary in star calculate: )The voltage to be applied at normal frequency to the primary to circulate full-load through it when the secondary is short-circuited li) The full load copper loss