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Two balanced three-phase loads that are connected in parallel are fed by a three-phase line having a series impedance of
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Chapter 2 Solutions
POWER SYSTEM ANALYSIS+DESIGN-EBK >I<
- Two delta connected loads are connected in parallel and powered by a balanced Y-connectedsource. The smaller of two loads draws 10 kVA at a lagging power factor of 0.75 and the largerdraws 25 kVA at a leading power factor of 0.8. The line voltage is 400 V. Calculate a) The powerfactor at which the source is operating. b) The total power drawn by the two loads. c) The phasecurrent of each load.arrow_forwardA 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. ..arrow_forwardThe standard unit of power factor of a 3-phase ac circuit is degrees. Select one: True Falsearrow_forward
- A 200 V single phase circuit has an apparent power of 5 KVA and reactive power of 4 KVAr. Then find (i) power factor (ii) impedance (iii) resistance (iv) reactance.arrow_forwardChatGPT 3.5 You A balanced load is connected in star across a 3 phase 415V 50Hz supply. The load consists of a coil of resistance 25 ohms and inductance 0.5 henry in parallel with a pure resistance of 28 ohms and a pure capacitor of 60 microfarads capacitance ib each branch Calculate I. The line currents Ii. The overall power factor. iii. The power delivered from the supply. iv. The power dissipated in the resistors and coils. v. The current in the neutral supported by a reason why its value is that deduced ?arrow_forwardIn the circuit in the figure; L1 load draws 15 kVA with lagging power factor 0.6. The L2 load draws 6 kVA with a leading power factor of 0.8. According to this; What is the value of the complex power for the L2 load?arrow_forward
- Three-phase supply from utility The diagram shown in figure has two three- phase loads that form part of a manufacturing plant. They are connected in parallel and require 4.16 kV rms. Load 1 is 1.5 MVA, 0.75 lag pf A connected. Load 2 is 2 MW, 0.8 lagging pf, Y connected. The feeder from the power utility's substation transformer has an impedance of 0.4+j0.8 2/phase. Deter- mine the following: (a) The required magnitude of the line voltage at the supply. (b) The real power drawn from the supply. (c) The percentage of the real power drawn from the supply that is consumed by the loads. 0.4 Ω j 0.8 Ω 0.4 Ω j 0.8 Ω 0.4 Ω j 0.8 Ω m Load 1 am Load 2arrow_forwardCOURSE: Electrical EngineeringSUBJECT: Electrical ApparatusINSTRUCTIONS:• Write the GIVEN with their respective symbols and units.• Do not skip the SOLUTIONS, do it step-by-step with their respective symbols and units• Round up to 3 three decimal places the FINAL ANSWERS and BOX it. PROBLEM: A source delivers 50 kVA to a load with a power factor of 65 percent lagging. Find the load’s average and reactive powers.arrow_forwardThree impedances (4-j6) ohm, (6+j8) ohm, and (5-j3) ohms are connected in parallel. Calculate the current in each branch when the total supply current is 20 A. Please provide its solution...its urgently needed...please.arrow_forward
- A single phase circuit has an apparent power of 5 kVA and a reactive power of 4 kVAr. Then find (i) power factor (ii) active power (iii) resistance of the circuit when the applied voltage is 200 V.arrow_forwardTwo parallel connected loads A and B are supplied by a 440 V line to line, 3-phase, 60 Hz generator. Load A draws an apparent power of 100 kVA at 0.80 pf lagging and load B draws an apparent power of 70 kVA at unity pf. Determine the line current supplied by the source.arrow_forwardThree different loads are connected in parallel across a 1000-volts (rms) single-phase source. Load 1: Inductive load, 120 kVA, 0.25 pf laggingB Load 2: Capacitive load, 11 kw, 41 KVAR; Load 3: Resistive load, 16 kW. (a) Determine the total reàl, reactive, and complex power. (b) Determine the supply power factor. (c) In order to improve the power factor to 0.8 lagging, a capacitor with negligible resistance is connected in parallel with three loads. Find the kVAr rating of that capacitor.arrow_forward
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning