Three 120 kVA 24,000/277-V distribution transformers are con-nected in A-Y. The open-circuit test was performed on the low-voltage side of this transformer bank, and the following data wererecorded:Vline,oc=277√3V Iline.oc=4.1 A P30,0 = 200 W. The short-circuit test was performed on the high-voltage side of this trans-former bank, but not at thee rated current, and the following datawere recorded: Vline.sc = 1600 V Iline.sc = 2 A P30.sc = 2200 W(a) Find the per-unit equivalent circuit of this transformer bank.For parts (b) and (c) the bank feeds the rated load at a power fac-tor 0.65 lagging at the rated voltage. (b) Find the voltage regula-tion of the transformer bank under these conditions. (c) Using the"load" model, determine the efficiency of the bank, n, under theseconditions.Three phase bank of single phase transformer on a utility pole.. (a.1) Rsc• (a.2) Xse• (a.3) Re• (a.4) Xm. (b) Vreg• (c) n........37.5 Kриpupupu%

Given data: KVA rating of the three-phase transformer: 120 KVA. Voltage ratio of the transformer:…

Three 120 kVA 24,000/277-V distribution transformers are con- nected in A-Y. The open-circuit test was performed on the low- voltage side of this transformer bank, and the following data were recorded: Vline oc oc=277√√3V Iline.oc=4.1 A P30.0=200 W. The short- circuit test was performed on the high-voltage side of this trans- former bank, but not at thee rated current, and the following data were recorded: Vline.sc = 1600 V Iline.se 2 A P30.se=2200 W (a) Find the per-unit equivalent circuit of this transformer bank. For parts (b) and (c) the bank feeds the rated load at a power fac- tor 0.65 lagging at the rated voltage. (b) Find the voltage regula- tion of the transformer bank under these conditions. (c) Using the "load" model, determine the efficiency of the bank, n, under these conditions. Three phase bank of single phase transformer on a utility pole.

Three 120 kVA 24,000/277-V distribution transformers are con- nected in A-Y. The open-circuit test was performed on the low- voltage side of this transformer bank, and the following data were recorded: Vline oc oc=277√√3V Iline.oc=4.1 A P30.0=200 W. The short- circuit test was performed on the high-voltage side of this trans- former bank, but not at thee rated current, and the following data were recorded: Vline.sc = 1600 V Iline.se 2 A P30.se=2200 W (a) Find the per-unit equivalent circuit of this transformer bank. For parts (b) and (c) the bank feeds the rated load at a power fac- tor 0.65 lagging at the rated voltage. (b) Find the voltage regula- tion of the transformer bank under these conditions. (c) Using the "load" model, determine the efficiency of the bank, n, under these conditions. Three phase bank of single phase transformer on a utility pole.

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: Three 100kVA 34.5kV primary 12/6.9kV secondary. Connect the transformers delta-wye. What is the…

A: Given: A transformer with Three 100kVA 34.5kV primary 12/6.9kV secondary. Primary is delta…

Q: Three one-phase (270 / 178V) transformers are connected in star-delta to the three-phase system.…

Q: A 209 V / 125 V single-phase transformer has a core loss of 120 W and the no-load current is 0.7 A.…

A: We need to calculate power factor .we will use given data to calculate power factor

Q: Cire W Variable AC Supply Open circuit Open circuit of a single phase transformer

A: Given circuit is the open circuit of a single phase transformer. The open-circuit test is used to…

Q: The voltage of a single phase transformer is 5000V primary and 500V secondary at no load. Calculate…

Q: In two winding transformers, windings are electrically isolated and magnetically connected. Select…

A: Transformer works on the principle faradays laws of electromagnetic induction. Transformer consist…

Q: A 6-Ohm resistor is connected to the secondary winding of a 1-phase 600V/120V transformer. What is…

A: Resistor value that is given in the secondary side can be transferred to the primary side by…

Q: A load impedance of 52 ohms is connected to the secondary winding of the transformer with 208 volts.…

A: Using ohms law I=V/R Given voltage is 208 volts And impedance of 52 ohms

Q: If the core loss of single phase transformer at full load is 294 W, then the core loss at 50% of…

A: In this question we need to find a core loss of a transformer at 50% load

Q: I will upvote for correct answer A transformer has a rated output of 300 kVA at a power factor of…

Q: TRUE or FALSE: Distribution transformers are always step-down transformers.

Q: Three single phase transformers are connected in a Wye- Delta configuration. Each transformer is…

A: The question is based on transformers and 3 phase system. The concepts used in this question are:…

Q: mer has primary and 80 turns on the secondary. The primary 2. A 100 KVA transf and secondary…

A: Given data, The rating is 100kVA. Primary resistance = 0.3Ω Secondary resistance = 0.1Ω Primary…

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: 2/A single-phase transformer with a capacity of 100 kVA and a voltage of 2000/400 and the equivalent…

Q: Three single phase transformers are connected in a Delta-Wye configuration. Each transformer is…

Q: connection of transformer is used to convert three phase to single phase. In a DC machine, e.m.f…

A: Scott T Transformers is used to convert three phase to single phase. It uses teaser transformer…

Q: Draw the equivalent circuit of a 10 KVA, 1860 / 400 V 1-phase transformer with R1=0.4 ohms, R2=0.03…

A: primary referred resistance=R1+R2' R2' is the secondary resistance referred to primary. Similarly…

Q: If the core loss of single phase transformer at full load is 284 W, then the core loss at 25% of…

A: Core losses at full load = 284W. Find the core losses at 25% load?

Q: TRUE or FALSE: Any two transformers connected in parallel will always share the load equally.

A: TRUE or FALSE question: Any two transformers connected in parallel will always share the load…

Q: A 2.2 KVA, 480/4800-V, 50 Hz, single-phase transformer is tested with the following results. Find…

A: Given short circuit test results of tranbsformer is,Asked to find the impedance referred to HV side.

Q: QUESTION 12 A single phase 600v/120v transformer has a load of 30 ohms resistive and 20 ohms…

Q: The Scott-T transformers are used to provide a variable voltage output. Select one: True False

A: The scott T transformation are used to provide a variable voltage output? This statement is true…

Q: A 3-phase transformer is assembled by connecting three 720 -VA, 360/120 V single phase transformers…

A: A 3-phase, Y−Δ connected transformer is assembled by connecting three 720 VA, 360/120 V single-phase…

Q: the core loss of single phase transformer at full O 52W O 105W O 13W O 210W

A: In transformer, mainly two losses present namely core and copper losses.

Q: Three single phase transformers are connected in a Wye-Wye configuration. Each transformer is rated…

A: Wye-Wye configuration Transformer rated 25kv/62kv Load = 640 KVA Supply = 25Kv (L-N)

Q: 2.Fringing effect is a phenomena occurs in ........... (a) Transformers. (b) Electrical field. (c)…

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

Q: 3.) A 110 - KVA, 2200/110, GO He Has the pollowing cincuit constants: R₁ = 0.2252, R₂ = 0.5 mst. x₁…

A: Given information about a single phase transformer is written below. Rated kVA is S=110 kVA. Induced…

Q: 210⁰ and Ic=980 cis - 60°. Find the negative sequence of phase B current. 11. The phase B current of…

A: In this question we need to find a current in line B

Q: 3. Single-phase T1-transformer with a power of 500 kVA and a single-phase T2- with a power of 400…

A: Power factor: This tells how much active power is utilized by the circuit from the apparent power.

Q: The distribution factor for 90 slots, 10-pole, 3-phase winding is A 0.90 B C D 0.895 0.959 0.978

A: Given: A 3-phase winding machine with, Slots = 90. Pole = 10.

Q: Maximum flux density in the core of a 250 V/3000 V, 50 Hz single phase transformer is 0.6 Wb/m². RMS…

Q: Q5/C: Compare between Auto transformers and 2 winding transformers.

A: The transformer is a static electrical device in which is used to step up/down the current and…

Q: A single phase 9.6 kVA, 500 V / 1.5 kV transformer has an impedance of 1.302 Ω with respect to…

A: GivenKVA of the transformer =9.6 KVA=0.0096 MVAPrimary side voltage=500 v=0.5 Kvsecondary side…

Q: transformer 1200 KVA, 11000/2200 V, 50 Hz." akage reactance/phase of the primary winding are…

Q: If the core loss of single phase transformer at full load is 39 W, then the core loss at 25% of load…

A: Need to find the core loss of Transformer at 25% of the load

Q: Two identical 460/230-V transformers are connected in parallel to a common load with impedance 10 +…

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

Three 120 kVA 24,000/277-V distribution transformers are con-
nected in A-Y. The open-circuit test was performed on the low-
voltage side of this transformer bank, and the following data were
recorded:
Vline,oc=277√3V Iline.oc=4.1 A P30,0 = 200 W. The short-
circuit test was performed on the high-voltage side of this trans-
former bank, but not at thee rated current, and the following data
were recorded: Vline.sc = 1600 V Iline.sc = 2 A P30.sc = 2200 W
(a) Find the per-unit equivalent circuit of this transformer bank.
For parts (b) and (c) the bank feeds the rated load at a power fac-
tor 0.65 lagging at the rated voltage. (b) Find the voltage regula-
tion of the transformer bank under these conditions. (c) Using the
"load" model, determine the efficiency of the bank, n, under these
conditions.
Three phase bank of single phase transformer on a utility pole.
. (a.1) Rsc
• (a.2) Xse
• (a.3) Re
• (a.4) Xm
. (b) Vreg
• (c) n
........
37.5 K
ри
pu
pu
pu
%

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

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 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

Q10) For the transformer shown in Figure below, determine (i) The turns ratio of the transformer (ii) The secondary current (iii) The voltage across the load R = 10k2 (iv) The voltage across the primary winding Ip = 3A Is = ? Ns = 20 turns RL Np = 60 turns 10k2 ellle lelll
what are the advantages and Disadvantages Connecting transformers 3 Phase between (delta to Star)
Two transformers are to be operated in parallel such that they share load in proportion to their KVA rating. The rating of the first transformer is 500 kVA and its pu leakage impedance is 0.05 pu. If the rating of second transformer is 250 kVA, then its pu leakage impedance is A 0.20 B 0.10 C 0.05 D 0.025
6. For the air core transformer circuit shown below, determine the currents la and lb in the direction shown. Express each answer in polar form. R1-302 www la ZI1=150 E=10/0 M=j20 Ze= n Z12=j62 lb R2=50 la Ib
925 3- The approximate equivalent circut of is to be determined. The open-circuit at 0 20KVA, 8000/240 V 60 Hz transformar short-circut tests that were performed transformer. primary side gave the following results. Open - Circut Test V₁x = 8000 Iloc=0-214 A Ploc = 400 W Short-Circuit Test |Visc = 489V 5₁s = 2.5A Pisc = 240k/ al Find the components of the magnetising branch i referred to the primary side b) Find the Components of the equivalent series impedence referred to the primary side. 119 210 2 15 16
transformrs
Three single phase transformers are connected in a Delta-Wye configuration. Each transformer is rated 13kV/64kV. The transformers are connected to a 3 phase 13kV (L-L) supply and the balanced three phase load is 788KVA. What is the current magnitude in the secondary winding of each transformer? explain the steps too please
You have a large single phase transformer with 7 tap settings (@ 0,+2,+4,+6% and -2,-4, and -6%) that lets you adjust the load voltage if necessary. The primary voltage is 4800V and the secondary voltage desired is 240V. Draw this arrangement with the 0% tap setting selected.
QUESTION 4 A single phase 600v/120v transformer has a load of 30 ohms resistive and 20 ohms inductive in series. what is the reactance (VARS) at the load? O 221 VARS O 53 VARS O 281 VARS O 197 VARS
iers? Explain. REVIEW QUESTIONS 1. Show how you would parallel connect the transformers to the source and the load in Figure 6-2. Windings 1 to 2 and 3 to 4 are rated for 2.4 kV ac and windings 5 to 6 and 7 to 8 are rated for 400 V ac. C. SOURCE R 2400V Figure 6-2. 2. The efficiency of a transformer which supplies a pure capacitive load is
What happen when the two transformers are operated in parallel having un equal turn’s ratio?