EBK POWER SYSTEM ANALYSIS AND DESIGN
6th Edition
ISBN: 9781305886957
Author: Glover
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 2, Problem 2.15MCQ
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Whether the given statement is true or false.
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5/The combined Transmission and Distribution Networks is called the Power Grid.
Select one:
True
False
Calculate the mesh current i1.
A 35kVA, single phase transformer is tested on both open circuit and short circuit conditions, losses thus measured being 140W and 420W respectively. Calculate(1) the efficiency when supplying half load at power factor of 0.8 .
(2)Load corresponding to maximum efficiency.
Chapter 2 Solutions
EBK POWER SYSTEM ANALYSIS AND DESIGN
Ch. 2 - The rms value of v(t)=Vmaxcos(t+) is given by a....Ch. 2 - If the rms phasor of a voltage is given by V=12060...Ch. 2 - If a phasor representation of a current is given...Ch. 2 - Prob. 2.4MCQCh. 2 - Prob. 2.5MCQCh. 2 - Prob. 2.6MCQCh. 2 - Prob. 2.7MCQCh. 2 - Prob. 2.8MCQCh. 2 - Prob. 2.9MCQCh. 2 - The average value of a double-frequency sinusoid,...
Ch. 2 - The power factor for an inductive circuit (R-L...Ch. 2 - The power factor for a capacitive circuit (R-C...Ch. 2 - Prob. 2.13MCQCh. 2 - The instantaneous power absorbed by the load in a...Ch. 2 - Prob. 2.15MCQCh. 2 - With generator conyention, where the current...Ch. 2 - Consider the load convention that is used for the...Ch. 2 - Prob. 2.18MCQCh. 2 - The admittance of the impedance j12 is given by...Ch. 2 - Consider Figure 2.9 of the text, Let the nodal...Ch. 2 - The three-phase source line-to-neutral voltages...Ch. 2 - In a balanced three-phase Y-connected system with...Ch. 2 - In a balanced system, the phasor sum of the...Ch. 2 - Consider a three-phase Y-connected source feeding...Ch. 2 - For a balanced- load supplied by a balanced...Ch. 2 - A balanced -load can be converted to an...Ch. 2 - When working with balanced three-phase circuits,...Ch. 2 - The total instantaneous power delivered by a...Ch. 2 - The total instantaneous power absorbed by a...Ch. 2 - Under balanced operating conditions, consider the...Ch. 2 - One advantage of balanced three-phase systems over...Ch. 2 - While the instantaneous electric power delivered...Ch. 2 - Given the complex numbers A1=630 and A2=4+j5, (a)...Ch. 2 - Convert the following instantaneous currents to...Ch. 2 - The instantaneous voltage across a circuit element...Ch. 2 - For the single-phase circuit shown in Figure...Ch. 2 - A 60Hz, single-phase source with V=27730 volts is...Ch. 2 - (a) Transform v(t)=75cos(377t15) to phasor form....Ch. 2 - Let a 100V sinusoidal source be connected to a...Ch. 2 - Consider the circuit shown in Figure 2.23 in time...Ch. 2 - For the circuit shown in Figure 2.24, compute the...Ch. 2 - For the circuit element of Problem 2.3, calculate...Ch. 2 - Prob. 2.11PCh. 2 - The voltage v(t)=359.3cos(t)volts is applied to a...Ch. 2 - Prob. 2.13PCh. 2 - A single-phase source is applied to a...Ch. 2 - Let a voltage source v(t)=4cos(t+60) be connected...Ch. 2 - A single-phase, 120V(rms),60Hz source supplies...Ch. 2 - Consider a load impedance of Z=jwL connected to a...Ch. 2 - Let a series RLC network be connected to a source...Ch. 2 - Consider a single-phase load with an applied...Ch. 2 - A circuit consists of two impedances, Z1=2030 and...Ch. 2 - An industrial plant consisting primarily of...Ch. 2 - The real power delivered by a source to two...Ch. 2 - A single-phase source has a terminal voltage...Ch. 2 - A source supplies power to the following three...Ch. 2 - Consider the series RLC circuit of Problem 2.7 and...Ch. 2 - A small manufacturing plant is located 2 km down a...Ch. 2 - An industrial load consisting of a bank of...Ch. 2 - Three loads are connected in parallel across a...Ch. 2 - Prob. 2.29PCh. 2 - Figure 2.26 shows three loads connected in...Ch. 2 - Consider two interconnected voltage sources...Ch. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - A balanced three-phase 240-V source supplies a...Ch. 2 - Prob. 2.41PCh. 2 - A balanced -connected impedance load with (12+j9)...Ch. 2 - A three-phase line, which has an impedance of...Ch. 2 - Two balanced three-phase loads that are connected...Ch. 2 - Two balanced Y-connected loads, one drawing 10 kW...Ch. 2 - Three identical impedances Z=3030 are connected in...Ch. 2 - Two three-phase generators supply a three-phase...Ch. 2 - Prob. 2.48PCh. 2 - Figure 2.33 gives the general -Y transformation....Ch. 2 - Consider the balanced three-phase system shown in...Ch. 2 - A three-phase line with an impedance of...Ch. 2 - A balanced three-phase load is connected to a...Ch. 2 - What is a microgrid?Ch. 2 - What are the benefits of microgrids?Ch. 2 - Prob. CCSQCh. 2 - Prob. DCSQ
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- 14. A 10kVA, 2000/440V transformer has a primary resistance of 1.2 ohms and secondary resistance of 0.058 ohm, calculate the total copper loss at full load.arrow_forwardadv payment @idckath A load of 12 MVA, 0.8 pf lagging, 22 kV is served by a transmission line which has a line resistance of 3 ohms and a line reactance of 10 ohms. Solve for the sending end voltage.arrow_forwardLet Rx = 20 ohm and perform nodal analysis, calculate voltage drop between terminals a and b, Vab. Step by step for further learning.arrow_forward
- A 3-phase, 50 Hz overhead transmission line has the following constants :Resistance/phase = 9·6 Ω Inductance/phase = 0·097 mH Capacitance/phase = 0·765 µFIf the line is supplying a balanced load of 24,000 kVA 0·8 p.f. lagging at 66 kV, calculate :(i) sending end current (ii) line value of sending end voltage(iii) sending end power factor (iv) percentage regulation(v) transmission efficiencyarrow_forwardPlease answer quickly "In ac circuits, Kirchhoff s Voltage Law (KVL) states that in any given electric network, the phasor sum of the voltage rises and voltage drops within a node is always equal to zero." True False In ac circuit solution using KCL, the maximum number of independent equation/s can be used is equal to the number of major nodes." True False Norton's theorem is a network analysis method that allows a portion of a circuit to be isolated while the remianing portion of the network is replaced with an equivalent network (a parallel voltage source to an equivalent impedance). True Falsearrow_forwardA 3 phase 150kVA, 4160V 0.80 lagging pf load is to be supplied by 3 single phase transformer having turns ratio of 2. Calculate the current that flows in the primary windings if the transformers are connected delta delta.arrow_forward
- 1 .Identity nodes and branches 2.Assign branch voltages and currents 3.Perform mesh transformation /write circuit matrix 4.write independent kvl equation 5.find out the impedance matrix Note:Replace the value of voltage from 0V to 10V in the leftmost elementarrow_forwardUsing the mesh method, calculate Vabarrow_forwardAPPLY MESH ANALYSIS CIRCUIT GIVEN( NEED NEAT HANDWRITTEN SOLUTION ONLY OTHERWISE DOWNVOTE).arrow_forward
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