4. Two balanced loads are connected in parallel to a three-phase, 460-V source. Load A is 900 kVA at a power factor of 0.6 lagging, and load B is 400 kW at a power factor of 0.8 leading. Calculate (a) total kW and kVAr, (b) overall power factor and (c) line currents.

4. Two balanced loads are connected in parallel to a three-phase, 460-V source. Load A is 900 kVA at a power factor of 0.6 lagging, and load B is 400 kW at a power factor of 0.8 leading. Calculate (a) total kW and kVAr, (b) overall power factor and (c) line currents.

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 3.22P: A balanced Y-connected voltage source with Eag=2770volts is applied to a balanced-Y load in parallel...

See similar textbooks

Related questions

Q: Ig= UA mA Rg= kQ Rc= RE= VB= V VCE= V V VBc= V *PAY ATTENTION TO THE SPECIFIED UNITS This circuit…

Q: Design a dual 0-100% duty cycle 555 Timer circuit that uses an astable 555 Timer to produce a…

A: A 555 timer is a counting device, it counts based on the clock pulse. IT can be used in various…

Q: Three non-inductive resistances, each of 100 Q, are connected in star to a three phase,…

A: Active power consumed by inductor is zero. Eventhough inductors connected in parallel, active power…

Q: for the circuit in Fig. 2.77, use KCL to find the branch currents I¡ to I4. 2 A 7 A I4 ЗА I3 4 A 12…

Q: A signal is passed through a LPF with cut- off frequency 10 kHz. The minimum sampling frequency is?

Q: The transfer function of discrete time system is given by: H[2) =- -:'+0.8z -0.8 2'-1.19 a) Sketch…

A: A discrete-time system is a system whose input as well as output consists of discrete-time…

Q: Design a 2-bit priority encoder. D0 is the highest priority. Include truth table and equation

Q: Analyse the amplitude modulated wave represented by the expression: v = 5 (1 + 0.6 cos 6280 t) sin…

A: Given data, AM wave v=51+0.6cos6280tsin211×104t V

Q: A factory has a large induction heater operating at 1000 V, 50Hz. The current flowing into the…

A: Given V= 1000 V I =12.33 A True power = 10 kW Note: Load type (single phase or three phase) is…

Q: P,(7) O dB -10 dB - 20 dB - 30 dB excess delay 5 10 13 Figure Q5

A: Given figure is shown below. Given στTs≤0.1

Q: Using mesh analysis, find Vo. Pg. 4 NAME: 6 V 1 kN 1 kN 1 k2 12 V + 2 k2 Vo

A: Brief description : In the above given question they have mentioned an electrical circuit which…

Q: Calculate current i

Q: 4. | Use nodal analysis to find Vo. Recall nodal analysis has unknown nodal voltages. Pg. 3 NAME: 12…

Q: 5 MH A 10 n 20 n 60 MH 100 cos (377 t) 10 n 5 mH 40 n 40 mH N 100 cos (377t + 120 ) 10 n SmH 60 n 20…

Q: Find the transfer functions for the systems shown. G1 (s) G2 (s) C(s) H, (s) H2(s)

Q: A A parallel LC tank circuit has L %3D 4 0mH, C 0.68NF, and coil winding a resistance of 100.…

A: It is given that: L=40mHC=0.68nFR=10Ω

Q: Prelab 1. What system types will yield zero steady-state error for step inputs? 2. What system types…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: 8.70 Use loop analysis to find V, in the circuit in Fig. P8.70. 1 Ω 1 Ω 10 Vo 4/0° A 6/0° v (+ -j1…

Q: You are presented with the following controlled rectifier configurations: |Configuration Topology…

A: We have to find smallest firing delay angle for Configuration 4 - Three phase bridge rectifier : R…

Q: ploblem: Find the ,inverse impulse response of the Following LTI System. t. S)=(1_e") u[t) u(t) hit)…

Q: A communication channel has 10 dB signal-to-noise ratio. Based on the Shannon capacity, what is the…

Q: A copper conductor has a diameter of 0.6 in and it is 1200 ft long. Assume that it carries a total…

Q: An AM receiver has 3 cascaded RF amplifiers arranged such that the IFRR successively increased by…

Q: Assuming ideal op amps, find the voltage gain va Vin [R1=152 ohm, R2-723 ohm, and R3-39 ohm) R1 R3…

Q: Kindly help me to arrive and draw the need and particular drawing for this analysis and how to come…

A: In this solution we discussed about the transistor & its circuit.

Q: The current in the 12 N resistor in the circuit in Fig. P3.30 is 1 A, as shown. a) Find vg. b) Find…

Q: decmal final answer please with clear solution!) If Iab is equal to 287.52∠26 and Ib is 166∠176, Ic…

Q: (Question # 31- 40) For a Fixed-Bias Configuration, if: Rc = 2.2 ko VCE = 7.2V IB = 0.005 lE lc =…

A: We need to find out beeta for given circuit

Q: Find the transfer functions for the systems shown. G1 (s) G2 (s) C(s) H, (s) H2(s)

Q: A combination of three resistors R1, R2 and R3 in series

A: Resistance in parallel- 1/Req=1/R1+1/R2+1/R3+........... Resistance in series-…

Q: (b) High-frequency ECG biopotentials analysis in the ST-T segment of a high-resolution ECG signal…

A: Biopotential: A biopotential electrode is a transducer that detects ion distribution on tissue's…

Q: Let V = 6xy2z3 + 5 In(x2 + y2 +3z2)V in free space. Evaluate each of following quantities at P(2,3,…

A: In this question we will find potential and electric field at given point.... Note :- as per our…

Q: 1 20 O 30. O 40. O 50. O 60. O 70. C:

A: We need to find out equivalent resistance for given circuit

Q: A series RLC circuit has R = 10Omega , C = 10^- 2F, L = 1/2 * H and an applied voltage E=5sin(10t)…

Q: 1. Let E = 400å, - 300đ, + 500å, in the neighborhood of point P(6,2, –3). Find the incremental work…

A: a. Determining the work done. dV=-E→·dl→dW=qdVdW=-qE→·dl→…

Q: 15.a. Which one of the following types of motors is not normally reversible? A. Universal motor B.…

Q: 12 V 2 kn ww 1 kN 2 kn 4 mA 1 kN Vo

Q: 5. Which one of the following types of motors is not normally reversible? A. PM motor B. Brushless…

A: Motor: A mechanical device that transforms electrical energy into mechanical energy is known as an…

Q: 2. If E = -xã, + yãy V/m. find the work involved in moving a unit positive charge on a circular arc,…

A: The potential difference is also termed as the work done to bring a unit charge in a uniform charged…

Q: 9. One issue encountered during the exploration of Mars has been the accumulation of static charge…

A: Solution

Q: Q3: Draw the block diagram of the Armstrong's Indirect FM. The frequency multiplier ni, n2 are 162…

Q: (Question # 31- 40) For a Fixed-Bias Configuration, if: Rc = 2.2 kQ VCE = 7.2V IB = 0.005 lE Ic =…

Q: • 2-DOF planar robot arm • Given I, I, Find: Jacobian (x, y) 4, cos 0, +1, cos(0, +0,)]_[h(0,,0,)] 4…

A: Nowadays, Most of the industries employs robotic arms for their daily operations. These robotic arms…

Q: In the circuit shown in Fig. 2.87, determine v, and the power absorbed by the 12-N resistor. 1Ω 1.2…

Q: 1. The load at a certain factory consists of the following: (i) 10 kW, pf = 0.6 lagging (ii) 15 kW,…

A: In the given questions we need to find out real and reactive power of the system.

Q: answer is 3.06701 please show all work how to get to it for upvote 513) A PID controller (Kp=40,…

Q: A coil develops heat of 800 cals/sec. when 20 V is applied across it. The resistance of the coil (1…

A: Given a coil develops, Heat, P=800 calssec Voltage across it, V = 20 V Resistance, R =?

Q: 1. A 30-kVA, 440-V, 50-Hz, 3-0, star-connected synchronous generator gave the following test data :…

A: The given table is shown below: It is given that: KVA rating=S=30 KVA=30×103 VAV=440 Vf=50 HzR=0.3…

Q: In the circuit of Fig. 2.76, obtain v1, v2, and V3. 15 V 25 V 10 V + v2 - + 20 V v1 = V V2 = V V3 =…

Q: Q2) Given the transfer function of the system (plant) as follows: B(s) s+6 A(s) 4s2 – 8s + 5 1-…

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

4. Two balanced loads are connected in parallel to a three-phase, 460-V source.
Load A is 900 kVA at a power factor of 0.6 lagging, and load B is 400 kW at a
power factor of 0.8 leading. Calculate (a) total kW and kVAr, (b) overall power
factor and (c) line currents.

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

Step 2

Step 3

Step 4

Step 5

Step by step

Solved in 5 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

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)
Connect three single-phase transformers in Y-Y, with subtractive polarity, so that the line-to-line voltages on the primary are 30 degrees delayed to their respective line-to-line voltages on the secondary. It should show each step that is needed to make this connection (example: the phasor diagram) and should show the final connection of the three transformers including the polarity markings. Assume phase A on the primary is terminal "H1".
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
Three single-phase transformers (ideal) are connected as shown in the figure below to supply a balanced 3-phase, 150 KVA, 600 VL load from primary 4.16 KVLL line. H1 X1 H2 X2 BALLANCED H1 X1 THREE PHAGE LOAD H2 X2 H1 X1 X2 (a) Draw (neatly) a phasor diagram showing the three, primary line-to-line voltages and the six secondary phase and line voltages. What is the phase relationship between the primary voltage VAB and the secondary voltage V12? Indicate on the phasor diagram:f
Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage windings are connected in Y. (a) For the low-voltage side, connect the windings in , place the polarity marks, 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 Va for positive sequence.
Does an open connection permit balanced three-phase operation? - (a) Yes (b) No
Three single-phase transformers, each rated 10MVA,66.4/12.5kV,60Hz, with an equivalent series reactance of 0.1 per unit divided equally between primary and secondary, are connected in a three-phase bank. The high-voltage windings are V-connected and their terminals are directly connected to a 115-kV three-phase bus. The secondary terminals are all shorted together. Find the currents entering the high-voltage terminals and leaving the low-voltage terminals if the low-voltage windings are (a) Y-connected and (b) - connected.
A balanced Y-connected voltage source with Eag=2770volts is applied to a balanced-Y load in parallel with a balanced- load where ZY=20+j10andZ=30j15ohms. The Y load is solidly grounded. Using base values of Sbase1,=10kVAandVbaseLN=277volts, calculate the source current Ia in per-unit and in amperes
In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generators are connected in star with thier star points grounded. The system base is 15 MVA. The transformers all have reactances of 0.04 p.u. on this 15 MVA base. The reactances of all other elements are given in Table 1 (in 2) and the voltage levels are given in Table 2. p.u. G1 p.u. T1 jö Per-Unit Convert all values to p.u. on a 15 MVA base. Xa= p.u. Xc₂= XL = V BABE G1 2 X 9 T3 Figure 1: A section of the distribution system T1 L Table 1: Sequence reactances (2) 3 G1 L G2 0.3 0.59 0.01 4 L 9/10 10 Fault Voltage What is the voltage at bus 3 (in Volts) after the fault has occurred? Vp= V T2 5 T2 34 10/4 Table 2: Voltage bases (kV) G2 4 T3 10/9 | G2 Fault Current A three-phase fault with a fault reactance of 0.01 p.u. occurs at bus 3. Calculate the fault current flowing at the fault point in KA. Ip=-j KA So
Consider the system shown in Figure 1. Assume the load voltage (VL) is 4720 V and the load consumption is 80 kVA at 0.85 lagging power factor. The line impedance (Zline) is 4.6+j8.5 2. The parameters of the 14,400/4800-V single-phase transformer referred to the secondary are: Req=0.95 , Xeq = 1.74 , Re = 48.5 kn, and Xm = 31.1 k. vp avs 4.6 +19.52 Zline Vs ~ P a:1 ele rmis alf Reais leee V₂ zí S Figure 1: System for Q1 I wad a) Find the current of the load. b) Find the primary and secondary voltages of the ideal transformer. nuomo I un cucc + Bline Xeq,s 1 V₂² 95, 74-32 1. VL 4720 Ponerlosture -> Pont IL = V₂ -V₂ Zine
If the line-to-line primary voltage and line current is 1.0 at 0 degrees, what is the secondary line- to-line voltage for the following three-phase transformers? Assume a turns ratio of N = 10. Express answer in polar form. a. Delta-to-Delta: b. Delta-to-Wye: c. Wye-to-Delta: d. Wye-to-Wye:
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. A. What is the magnitude of the voltage across the load in volts? (2 decimal places) B. What is the magnitude of the total current supplied by the 7900-V source in amperes? (3 decimal places) C. What is the efficiency of the parallel transformers combined in percent? ( 1 decimal place)