A small manufacturing plant has the following connected loads: Load 1 (L1): lighting/outlet/appliances 4,500 W at 0.85 pf LAG Load 2 (L2): compressor motors/pumps 37,300 W at 0.75 pf LAG Load 3 (L3): heaters 15,000 W at 0.95 pf LAG Vsource 440 VAC (rms) 60 Hz L1 L2 L3 Capacitor Bank for power factor improvement

A small manufacturing plant has the following connected loads: Load 1 (L1): lighting/outlet/appliances 4,500 W at 0.85 pf LAG Load 2 (L2): compressor motors/pumps 37,300 W at 0.75 pf LAG Load 3 (L3): heaters 15,000 W at 0.95 pf LAG Vsource 440 VAC (rms) 60 Hz L1 L2 L3 Capacitor Bank for power factor improvement

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.16P: A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and...

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A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)
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Please answer all questions 1. Calculate the magnitude (in RMS) of the current through R1 2. Calculate the magnitude (in RMS) of the current through R2. Simulation 1. Construct the circuit in Figure 2 in the Circuit JS simulator. Note that transformers in Circuit JS may be unstable. It is suggested to draw them by clicking from the bottom left corner to the top right corner and refresh your simulation before taking a measurement. 2. Perform a simulation, displaying the voltage across the voltage source, the current through R1, and the current through R2 in a “stacked” scope. Display the RMS average for each trace. Include a screenshot. Analysis 1. Compare the simulation results for the currents through R1 and R2. What is the percentage difference between the calculated and simulated value for each? Comment on why there may be a discrepancy.
Determine the peak-to-peak ripple and dc output voltages in Figure 2. The transformer has a 48 V rms secondary voltage rating, and the line voltage has a frequency of 60 Hz. (you may neglect Rsurge). 120 V rms 00000 ellee Figure 2 Rug www 10 100 F ww R₁ 3.3k
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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.