Concept explainers
The phase sequence for the Y-Y system in Fig. 24.42 is ABC.
a. Find the angles
b. Find the voltage across each phase impedance in phasor form.
c. Find the current through each phase impedance in phasor form.
d. Draw the phasor diagram of the currents found in part (c), and show that their phasor sum is zero.
e. Find the magnitude of the line currents.
f. Find the magnitude of the line voltages.
Want to see the full answer?
Check out a sample textbook solutionChapter 24 Solutions
EBK INTRODUCTORY CIRCUIT ANALYSIS
Additional Engineering Textbook Solutions
ANALYSIS+DESIGN OF LINEAR CIRCUITS(LL)
Principles and Applications of Electrical Engineering
Principles Of Electric Circuits
Electronics Fundamentals: Circuits, Devices & Applications
Electric Circuits (10th Edition)
Programmable Logic Controllers
- Q6: i) Which of the following is true for a transmission line under load? Power factor at both the sending and receiving end will be equal Reactive Power at both the sending and receiving end will be equal. Active Power at the sending end will be greater than the active power at the receiving end. Line current in the sending end will be equal to the line current at the receiving end ii) A transmission line has 80% efficiency when delivering 500 KW power to a 3-phase load at the receiving end. This implies that ______. Voltage regulation of the line is 20% Active power at the receiving side 375 kw/phase Active power at the sending end is 500 kw/phase Total power loss in the transmission line is 125 kW iii) Which of the following is true for transmission line under no-load? Power factor at the sending end will be unity Active Power at the…arrow_forward12) If Vab = 223 Vrms in a balanced Y-connected three-phase generator, find the magnitude of the phase-c voltage (in Vrms), assuming the phase sequence is acb.arrow_forwardA three-phase transmission line has resistance and inductive reactance of 25V and 90V, respectively. With no load at the receiving end, a synchronous compensator there takes a current lagging by 90; the voltage is 145 kV at the sending end and 132 kV at the receiving end. Calculate the value of the current taken by the compensator. When the load at the receiving end is 50MW, it is found that the line can operate with unchanged voltages at the sending and receiving ends, provided that the compensator takes the same current as before, but now leading by 90. Calculate the reactive power of the loadarrow_forward
- A balanced Y - connected load having a 25 Ω resistance in each leg is connected to a three -phase , four wires, Y-connected ABC sequence AC generator, if the line volatge EAB=, calculate 1. The phase voltages of the generator 2. The phase voltages of the load 3. The phase currents of the load 4. The line currentsarrow_forwardIn a 3-phase star connected system, prove that VL = Vph by considering the line voltage (VYB = VY - VB ) with the help of necessary phasor diagram.arrow_forwardDerive the relationship between in case of star and delta connected load between: a). Phase voltage and line voltage b). Phase current and line currentarrow_forward
- For the given network, determine RE and RB if Av= -10 and re = 3.8 Ohms. Assume that Zb= βRE.arrow_forwardA balanced Δ - connected load having a 15 Ω resistance in each leg is connected to a three -phase , four wires, Y-connected ABC sequence AC generator, if the line volatge EAB=, calculate 1. The phase voltages of the generator 2. The phase voltages of the load 3. The phase currents of the load 4. The line currentsarrow_forwarda single-phase transmission line has two parallel conductors, 1.5 meters apart. the radius of each conductor is 0.3 cm. calculate the inductance per meter of the line.arrow_forward
- An Alternator having three-phase, 3-wire ABC system supplying an effective line voltage of 120 V, has an athree-impedances of 50 / 45 ohms in Delta connection. Assume that Vbc is the reference vector. Determine a) linecurrent and line voltages with its degrees, b)Draw the current –voltage phasor diagram c) and the power generated inthe line quantities of the alternator.arrow_forwardProblem 2B A star-connected three-phase load absorb 3000 W with power factor 0.433 lagging has a resistance series with an inductance in each branch. It is connected to the 400Vrms (line voltage), 4-wire, 50 Hz, 3-phase supply with the phase sequence is ABC and phase-A as reference has angle 10°.a. Sketch the circuit diagram of the system.b. Calculate the phase voltages of each loads. c. Calculate the phase currents that flow into each load.d. Draw for both of the phasor diagram of load currents and load voltages.arrow_forwardIf Vab = 400 V in a balanced Y-connected three-phase generator, if assuming the abc phase sequence then the phase voltage Van isarrow_forward
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning