A three-phase feeder provides two loads A and B at 380 V (Figure 2). considering the impedance of load A of (55 + j89) ohms and that of load B of (90 + j66) ohms. indicated as currents in phases A that feed the two loads and currents in the delta connected load.

A three-phase feeder provides two loads A and B at 380 V (Figure 2). considering the impedance of load A of (55 + j89) ohms and that of load B of (90 + j66) ohms. indicated as currents in phases A that feed the two loads and currents in the delta connected load.

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 3.43P: Three single-phase transformers, each rated 10MVA,66.4/12.5kV,60Hz, with an equivalent series...

See similar textbooks

Related questions

Q: Consider the microgrid of Figure 3.66. A three-phase transformer, T1, is rated at 500 kVA, 220 VY…

A: Power System : The power system is a network that includes the generation, distribution, and…

Q: L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1450 rpm,…

A: First we will calculate impedance ssen by the source and than we will find current from source in…

Q: Which of the following statements are true for simple systems consisting of a balanced three-phase…

A: Wye - connected system - In wye connected load, line and phase currents are identical but line…

Q: A. Phase-to-neutral voltage at source. B. Line-to-line voltage. C. Phase-to-neutral voltage at load.…

Q: L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1480 rpm,…

Q: A single-phase circuit is placed across a 120-Vrms, 60-Hz source, with an ammeter, a voltmeter, and…

A: The current in the circuit is 12 A. The voltage across the circuit is 120 V. The active power read…

Q: . A power station is to supply two loads. The daily load curve of two loads are shown in the figures…

A: As per bartleby expert policy, only first three sibparts are to be answered, subpparts are (1), (2-…

Q: Two impedances Z₁ and Z2 are connected in series to a voltage source with voltage Vs volts. Let V₁…

A: Given that two impedances are connected in series to a voltage source Vs. V1 is the voltage across…

Q: Question 3 Two interconnected substations O and P are interconnected via a distribution line of…

Q: 25 20 15 10 4 12 16 20 24 hours 12 16 24 hours Load curve A Load curve B t the load and duration…

A: In this question, we have given daily load curve of two loads..We have to find out load factor…

Q: Source: Ean = 12020° v; Epn = 1204 – 120° v; Een = 1204120° v (grounded neutral) Zan = Zpn = Zen =…

A: Given Condition : Without fault

Q: 3. A system consists of two plants connected by a tie and a load is located at plant two. When 100MW…

Q: In a 3 phase Wye-Delta connection a.)What is the relationship between the line to line voltage at…

Q: Q2. A power station is to supply two loads. The daily load curve of two loads are shown in the…

Q: In a given system of base power of 250 MW, and bus 3 is taken as reference. The per-unit reactances…

A: Base power 250 W Bus 3 is taken as a reference The per-unit reactances are X12=0.2 pu X13=X23=0.1…

Q: (Q.2) The following figure shows the one-line diagram of a simple three-bus power system. A second…

Q: Find the equivalent resistance per phase for the following three-phase load-balanced arrangements,…

Q: 44) When doing delta-to-wye conversions A) if the resistances are equal in one configuration, then…

A: From the delta star conversion formulas decide which statement is correct.

Q: Two impedances Z₁ and Z2 are connected in series to a voltage source with voltage Vs volts. Let V₁…

A: Please comment if you need any clarification. If you find my answer useful please put thumbs up.…

Q: Q1. Determine the Load current at 5K N resistor by using Thevenin's Theorem for the given Figure A.

A: The solution can be achieved as follows.

Q: In a three phase Delta-Wye connection a.) What is the relationship between the line to line voltage…

Q: With the aid of the table for the formulas in three phase systems, solve the following problems by…

A: According to question: The circuit diagram is drawn as

Q: A single-phase a.c. distributor AB is fed from end A and has a total impedance of (0·2 + j 03) ohm.…

A: Given Data:

Q: Figure Q2 below shows a manufacturing plant connected to three phase 3600 V line of wye…

A: Given data: The source is wye (star) connected and operating frequency is f=50 Hz. Sending end line…

Q: L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1420 rpm,…

A: The slip of the three-phase ASM is calculated as shown below: Ns=120fPP=4f=50…

Q: Assume that a load of 100 kW is connected at the Riverside substation of the NL&NP Company. The…

A: Given data, Load, P = 100 kW. Demand, D = 75 kW. Weekly energy consumption, E = 4200 kWh.

Q: A balanced positive-sequence wye-connected 60-Hz three-phase source has line-to-neutral voltages of…

Q: Using the nodal roint method in the sircuit shown in the figure, calculate the curxents passing…

Q: Key = 93 ohm • Consider a single phase three wire power supply as shown in the figure below. This is…

A: In the circuit, 2 independent voltage sources are supplied to the three resistive load. Find the…

Q: (a) Considering pure resistance in an ac circuit element, show that the alternating voltage and…

Q: DC Loads need to be connected to the power source through 2 wires (+) and (-) whereas AC loads…

Q: A three-phase steel-treatment electric oven has aphase resistance of 10Ω and is connected…

A: a) The current flowing through the resistors in wyeand delta connections. The current for the wye…

Q: Ean = 12020° v; Epn = 1202 – 120° v; Een Zan = Zbn = Zen = 0.1 +j1.5 0 Line 2: Ztine a = 1+j2 0;…

Q: Question one A balanced star connected load comprises of 20 ohm resistance and 0.07 Henry inductance…

A: Given that Rph=20 ohmLph=0.07 Hf=50 HzVL=415V Calculate the indctive reactance…

Q: 2. Consider a A-A configuration balanced three-phase system where the phase sequence is abc .…

Q: Given the circuit fed by 50HZ voltage source Vs, knowing that Z, is an inductive load wit 0.8 power…

A: Since you have asked multiple questions in a single request, we will be answering only the first…

Q: A balanced A-connected load consisting of a pure resistances of 152 per phase is in parallel with a…

A: Explanation: a) Converting the delta circuit into an equivalent star circuit, so the per branch…

Q: o the discussion about Power measurement using Wattmeter, Ammeter and Voltmeter & Power…

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

Q: 3) j+0,15 A/m 400/231 V 400/231 V cosfi=1 в 50m D S0m E F A 100m 125m 50m ZZZZ 80A cosfi=1 100m…

Q: A balanced ∆-connected load, with Z∆ = 30 30° Ω, is connected to a three-phase, three- wire, 250-V…

A: It is given that: Z∆=30∠30° ΩZC=0.4+j0.3 ΩVph=250 V

Q: Q12. The 8.C and S.C test data are given below for a single phase, 5 kVA, 200V/400V, 50HZ…

A: Solve as below

Q: In the chopper circuit shown in figure below, E=220 V, L= 1.5 mH, R=0.5 ohm and it is operating with…

Q: Example 2.4 Three loads are connected in parallel across a 1400-V rms, 60-Hz single-phase supply as…

A: Three loads are connected in parallel across 1400volts , 60 hz rms supply. i.inductive load is…

Q: 2. A single-phase a.c. distributor AB is fed from end A and has a total impedance of (0-2 +j03) ohm.…

A: The solution can be achieved as follows.

Q: A resistor, in series with a 138-microfarad capacitor, is connected to a 60-cycle source. If the…

A: A resistor, in series with a 138-microfarad capacitor, Frequency=60Hz The voltage drop across the…

Q: PHASE PLANT CONSUMES 600 KVA, WITH A VOLTAGE OF 2400 VOLTS AND A POWER FACTOR OF 0.8 BEHIND. a)…

A: PLANT CONSUMES 600 KVA, WITH A VOLTAGE OF 2400 VOLTS AND A POWER FACTOR OF 0.8 BEHIND.

Q: A 60Hz sourcewith an effective voltage of 240 volts supplies 4500 volt-amp to a load with a p.f. of…

A: voltage =240 volts p.f. of 0.75 lagging.

Q: A three-phase feeder supplies two loads A and B at 380 V (Figure 2). Find the impedance of load A of…

A: A three-phase feeder supplies two load A and B at 380V. Now, the impedance of the delta connected…

Q: 10A. Calculate the power consumed of the load, load impedance and power factor of the load. c) What…

A: a. Given NP=1NS=240Rm=1 ΩXm=0.5 ΩRz=0.5 ΩXz=0.25 Ω

Q: 1. To demonstrate the theoretical method of transforming delta networks to wye network, or…

A: As per our guidelines, we are supposed to answer only one question. Kindly repost other questions as…

Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

Question

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

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 5 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

A three-phase system has balanced conditions so that the per-phase circuit representation can be used as shown in Figure 1 Select the turns ratio of the step-up and step-down transformers that the system operates with an efficiency greater than 99 percent. Moreover, find the complex power (received or given) of all components in the circuit and the V1 and V2 voltages. The load voltage is specified as 4 kV rms, and the load impedance is 4/3 ohm. ..
A three-phase feeder supplies two loads A and B at 380 V (Figure 2).Find the impedance of load A of (55 + j89) ohms and that of load B of(90 + j66) ohms. Ordered as currents in phases A that feed the twoloads, and as currents in the delta connected load.
Explain current divider rule in ac circuits with two parallel impedances Z1 and Z2. Calculate the currents I1 and I2 in phasor form for the circuit given in figure.
(b) A symmetrical delta-connected 415V three-phase supply is feed to an asymmetrical delta- connected load as shown in Figure Q2(b). Assume that it is a RYB sequence. The impedances of the load are ZrY = 50 + j50 N , ZYB = 150 + j0 N and ZBr = 50 –j50 N. jos (i) Determine and draw the phasor diagram of phase currents in the load. (ii) Determine and draw the phasor diagram of line currents in the system.
Three load units A, B and C are connected in parallel and take currents that are respectively 12, 10 and 15 amperes. Assuming IA to be the reference phasor, IB leads IA by 30°, and IC lags IA by 65°, calculate the total current and the angle it makes with the reference.
Two 7970-V:230-V single-phase transformers with impedance with respect to their secondaries of 1.5 + j3 and 2 + j4.5 ohms are connected in parallel to a 7900-V source. Their secondaries are supplying a common load of 30 + j40 ohms. What is the magnitude of the voltage across the load in volts? (2 decimal places)
If you have 3-phase power and you need to step down (or up) in 3-phase voltage, how many single-phase transformers are needed? Explain.
Need asap pls help. Solve for the voltages across and currents through each component. Show the complete solution and explain. The total power should be zero..
Problem 5 Consider a three winding transformer with the following particulars: = Z₁ Z2 Z3 =0.02 + j0.08 £, V₂ = 400 V, 12 = 60/30° A, and I3 = 50/-40° A. Assume that V₂ is the reference phasor, calculate: The intermediate voltage Vo. a. b. The primary current I₁ and the primary voltage V₁. c. The tertiary voltage V3 referred to the primary side. d. The apparent powers and the power factors at the primary, secondary and tertiary terminals. e. The transformer efficiency.
Two impedances consist of resistance of (15 ohms and series connectedinductance of 0.04 henry) and (resistance of 10 ohms, inductance of 0.1 henryand a capacitance of 100 microfarad, all in series) are connected in series andare connected to 230 volts, 50 – Hz AC source. Find: (a) current drawn, (b) voltageacross each impedance, (c) individual and total power factor. Draw the phasordiagram.
5.In three-phase transformers, the high voltage star connection is preferred. This is so because in this case A) The voltage on the star windings is lower than if they were in delta and this reduces manufacturing costs. B) The voltage on the star windings is higher than if they were in delta and this reduces manufacturing costs. C) The voltage on the star windings would be the line-to-line voltage of the system since it is a three-phase manufacturing transformer. D) THERE IS NO SOLUTION
For the circuit given in Figure 1, a) Find the Thevenin equivalent circuit with respect to terminals a-b b) When a 5000 resistor is connected to terminal a-b, find the voltage on the resistor wwwwwwmm c) It will be connected to a-b terminals and its voltage on 5000 load will be 132 kV rms. What should be the capacitive reactance value that will increase it? wwwwwwwww d) What happens to the short-circuit current when the a-b terminals are short-circuited? 2+1202 000 m da 127/6 kV rms ob 1.5 +/902 000 w 12725 kV ms