1. Two single-phase transformers A and B of equal voltage ratio are running in parallel and supplying a load requiring 500 A at 0.8 power factor lagging at a terminal voltage of 400 V. The equivalent impedances of the transformers, as referred to secondary windings, are (2 +j3) and (2.5 + j5) ohm. Calculate the current supplied by each transformer. (Note. The student is advised to try by arithmetic method also). [I = 304 A ; I = 197 A] %3D

1. Two single-phase transformers A and B of equal voltage ratio are running in parallel and supplying a load requiring 500 A at 0.8 power factor lagging at a terminal voltage of 400 V. The equivalent impedances of the transformers, as referred to secondary windings, are (2 +j3) and (2.5 + j5) ohm. Calculate the current supplied by each transformer. (Note. The student is advised to try by arithmetic method also). [I = 304 A ; I = 197 A] %3D

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: What do you understand by the term of burden? In practice, why is it essential that the secondary…

A: In the context of transformers and electrical systems, "burden" refers to the impedance or load…

Q: Two transformers A and B have the following data Transformer A: 6600/440 V, (250 KVA ) requires (…

A: Solving for given transformer A, aA=6600440aA=15 Given low voltage side is short circuited,…

Q: Two single-phase 11,000/400 V transformers have kVA ratings of 200 kVA and 100 kVA respectively. The…

Q: Q1-A 3-phase step down transformer 1200 KVA , 11000/2200 V, 50 Hz .The resistance /phase and leakage…

A: Disclaimer: Since you have asked multiple questions, we will solve the first question for you. If…

Q: A-Give the answer of the following: 1. what functions are performed by instrument transformers. 2.…

A: (1) Consider the function performed by the instrument transformer as follows:

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: Prove that the primary and secondary E.M.F. lag behind the flux by 90 degree. ha?

A: ''Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 6) A transformer takes 100V at primary and gives 50V at secondary, its turn ratio equals ... ....…

A: Primary voltage =100V secondary voltage= 50V

Q: ncode the following decimal numbers in BCD code. Answer all the question and provide step by step…

Q: In the system shown in Figure 1, the transformers are connected star-star with both star points…

A: It is given that: MVAbase=15XT1=XT2=XT3=0.04 pu

Q: 55 V / 220 V, 50 Hz single phase transformer, high voltage (secondary) windings are left idle and…

A: Winding resistance of the secondary referred to the primary, R2'=0.015 Ω

Q: At the end of a one-phase supply line with a series impedance of 1+j2 ohms, a 50 kVA, 2400/240 volt,…

Q: A single phase transformer has a voltage transformation ratio of 0.4. The resistance and reactance…

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

Q: (1) (iii) Write the expressions of the line-to-neutral voltages Vas, Von Ven and then determine the…

A: In the given question to solve the current for part b primary side, line and phase currents are…

Q: equivalent winding (a) resistance,(b) reactance and (c) impedance referred to the high voltage side.

Q: What happen when the two transformers are operated in parallel having un equal turn’s ratio.

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Find the resistance using color coding. 1 2 3 4

A: To find the resistance by color coding

Q: C2 (1). Draw the Schematic diagram and explain the working of LVDT and write any two applications of…

A: We are authorized to answer one question at a time. Since you have not mentioned which question you…

Q: Single phase 10 kVA, 480 V / 120 V to feed a 120 V load from a 600 V source conventional transformer…

Q: A-derive an equation for the copper saving in autotransformer. B- what are the disadvantages of the…

A: Given We need to derive the equation for saving of conductor in an autotransformer and we need to…

Q: 1. What happen when the two transformers are operated in parallel having turn's ratio. un equal

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Q/ Two transformers A andB of ratings 500 KVA and 250 KVA are supplying a load KVA of 750 at 0.8 Pf…

A: Given- For Transformer A power PA=500 KVA open circuit voltage EA=400 V resistance=1% reactance=5%…

Q: the no load current I0 is in phase with the magnetic flux

Q: A load of 200 kW at 0.85 power factor is to pe shared by two transformers A and B aving the same…

Q: Solv

A: a)Transformers work on the principle of electromagnetic induction in accordance with Faraday’s law.…

Q: Two 7970-V:230-V single-phase transformers with impedance with respect to their secondaries of 1.5…

A: Primary Voltage = 7900VSecondary Voltage = 7970 VLoad Impedence = 30+j40 ohms1st transformer…

Q: Can efficiency be determined for a single phase transformer under open circuit test ?and if so…

A: Open circuit test on transformer: Open circuit test on a transformer is done to determine the no…

Q: 2. What are the necessary conditions for successful operation of two single- phase transformers?

A: As per Bartleby guidelines we are allowed to solve only one question, please ask the rest again.

Q: The algebraic symbol for the number of turns on the high voltage side of the transformer is_____. A)…

A: The algebraic symbol for the number of turns on the high voltage side of the transformer is Th The…

Q: 1. On a 120/208-V four wire Y system, two lamps are connected from phase A to neutral, 5 lamps from…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 5. Transformer cores are laminated in order to (a) simplify its construction (b) minimise eddy…

A: Transformer is a static device which is used to step up /down the current or voltage level without…

Q: Two transformers A and B of ratings 500 KVA and 250 KVA are supplying a load KVA of 750 at e.8…

A: Open circuit voltage VAO=400 volt impedance for transformer A, ZA=RA+jXA×Voc2KVAA…

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

Tutorial Problems 32.6
1. Two single-phase transformers A and B of equal voltage ratio are running in parallel and supplying a
load requiring 500 A at 0.8 power factor lagging at a terminal voltage of 400 V. The equivalent
impedances of the transformers, as referred to secondary windings, are (2 +j3) and (2.5 + j5) ohm.
Calculate the current supplied by each transformer.
(Note. The student is advised to try by arithmetic method also).
[I = 304 A ; I = 197 A]
2. Two single-phase transformers A and B are operating in parallel and supplying a common load of
1000 kVA at 0.8 p.f. lagging. The data regarding the transformers is as follows :

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 2 images

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

Consider the three single-phase two-winding transformers shown in Figure. 3. The high-voltage windings are connected in Y. (a) For the low-voltage side, connect the windings in A, and label the terminals a, b, and c in accordance with the American standard. (b) Relabel the terminals a', b', and c' such that VAN is 90° out of phase with V₂'b' for positive sequence. DI H₂ Figure. 3: Three-Winding Transformer
Q2/A/ What are the conditions for satisfying parallel operation of single phase transformer? Deduce an expression for the load shared by the two transformers in parallel when the transformers have equal voltage ratio? Prove your answer. B/ A 50 KVA, 2300/230 V, 60 11z transformer has a high voltage winding resistance of 0.650 and a low-voltage winding resistance of 0.0065 2. Laboratory tests showed the following results: Open circuit test: V = = 230 V, I =5.7A, P = 190 W Short circuit test: V-41.5 V, I-21.7 A, P-No wattmeter was used. 18 (2) Compute the value of primary voltage needed to give rated secondary voltage when the transformer is connected as a step-up one and is delivering 50 KVA at a power factor of 0.8 lagging. (b) Compute the efficiency under conditions of part (a).
2.Fringing effect is a phenomena occurs in .. (a)Transformers. (bElectrical field. (e)Air gap (d)All of the above. 3, The kVA rating of an ordinary 2-winding transformer is increased when connected as an autotransformer because (@ transformation ratio is increased (b) secondary voltage is increased (c) energy is transferred both inductively and conductivity (d) secondary current is increased. 4. The .... of the hysteresis loop is a measure of energy lost per cycle (a) area. (b) Туре. (c) Frequency (d) No one of the above. 5. At relatively light loads, transformer efficiency is low because (a) secondary output is low (b transformer losses are high (c) fixed loss is high in proportion to the output (d) Cu loss is small. 6. In an ideal transformer, (a) windings have no resistance (b) core has no losses (c) core has infinite permeability (d) all of the above. 7. In electromagnetic circuits, path of eddy current is.... (a) Parallel to the path of the flux. (b) Perpendicular to the path of…
Electrical Machines 3.1...
2. Given three identical ideal single-phase transformers with each rated at 100KVA and 7kV/3.5kV, they are connected as a three-phase transformer bank. The three-phase transformer has high voltage side connected in delta and the low voltage side is connected in wye. A three-phase 200KVA, wye connected load is connected at the low voltage side of the transformer. Calculate the following: a. Rated line-to-line voltage on each side b. Line current on each side of the transformer
a single-phase transformer serves a 7.2kw resistive loadlocated 200 ft from the transformer. each conductor from the transformer to load has an impedence of (0.78+j0.052) ohms per 1000ft. if the voltage at the load terminal is 240v, the magnitude of the voltage (v) at the transformer secondary is most nearly:
QUESTIUNDH 1. Why is it not adjustable to carry or the same experiment for large transformers? 2. What method you have to apply to determine the efficiency of large transformer? 3. Draw the vector diagram for unity, leading p.f and lagging p.f at rated secondary current?
Q3: At the parallel operation of three-phase transformers: a) Give an explanation for the following cases: i. Two-lamps are glow-up ii. Three-lamps are glow-up b) Two three-phase 11kV/ 380 V transformers are connected in parallel to serve a load of 36 kVA at unity power factor. The secondary side current for one transformer is 14.1 A, determine the load sharing for each transformer and the current of the other transformer.
Example 5 A 600 kVA transformer has a primary winding resistance of 0.62 and a secondary winding resistance of 0.002 2. The iron loss is 2.6 kW and the primary and secondary voltages are 6 kV and 330 V respectively. If the power factor of the load is 0.8, determine the efficiency of the transformer (i) on full load, and (ii) on half R.. load.