1. Assume that a 2.5-kV 1-phase circuit feeds a load of 450 kW at a lagging load power factor and the load current of 215 A.If it is desired toimprove the power factor determine the following.a. The new corrected p.f after installing a shunt capacitor unit with a rating of 350kvar.none0.992 lag0.9 lag0.952 lag

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Answered: 1. Assume that a 2.5-kV 1-phase circuit…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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IN THE CIRCUIT OF THE FIGURE THE LOADS ARE THE FOLLOWING: LOAD A: 4 KVA WITH F.P = 0.8 IN DELAY LOAD B: 2.4 KVA WITH F.P = 0.6 IN DELAY LOAD C: 1 KW AND 500 VA INDUCTIVE DETERMINE: a) Current I b) The power factor of the combination.
The figure shows a 3-phase bala Time left 1:06:30 200 /00 Vrms. sequence electrical system. Vcn Vbn %3D al Balanced (-) sequence 100 so a 2000 Vms Select one: O a. 200 /-120 Vrms O b. 200 v2 /0 Vrms O C. 200 /0 Vrms O d. 200 v2/-120 Vrms e. 200/120 Vrms
1) Determine the total current supplied by the source and the current in each branch. 2) Sketch a fully labelled phasor diagram showing all voltage and currents in the circuit. 3) Determine the active power delivered by the source voltage. 4) Determine the reactive power. 5) Sketch the power triangle. 6) Comment on the significance of the power factor and briefly state how it can be improved.
in three phase it has been found that a negative sequence and zero sequence are absent what do you conclude from it?
Repeat the previous problem if the power factor at the power input, instead of being unity, turns out to be 0.8 leading, with the addition of the pure reactive element. The prompts for the answer are the same.
Two loads are connected in parallel to a 2000 V(rms) 50Hz source. one of the loads Each of them has 500KVAR reactive power and 0.6 reverse power factor. Other load 300KW since it has absorbing power and 100KVAR dissipating power a) Draw the equivalent circuit of the system b) Find the common power factor of the system c) In order for the power factor to be 0.98 back, the capacitor to be connected in parallel with the loads find its value d) The magnitude of the current drawn from the source is measured before and after the capacitor is connected Find and compare for the next cases. Not. Solve this question in detail step by step and explain your requests in detail
A three-phase alternator generating unbalanced voltages is connected to an unbalanced load through a 3-phase transmission line as shown in figure. The neutral of the alternator and the star point of the load are solidly grounded. The phase voltages of the alternator are Ea = 1020º, Eb = 102-90°, Ec = 10/120⁰ E E E The positive sequence component of the load current is (A) 1.3102-107⁰ A (B) 0.3322-120° A (C) 0.9962-120º A (D) 3.5104-81⁰ A +) + j1.002 0000 j1.002 0000 j1.0Ω vovo j1.0Ω 0000 j2.002 voor j3.002 oooo
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A 440 V, 60 Hz generatorsuppliestwo parallel-connected loads A and B,. LoadA draws an apparent power of 100 KVA at 0.8 pf lagging and load B draws anapparent power of 70 KVA at unity pf. Determine the KVA supplied by the generator.
5. A generating station has the following daily load cycle: Time in 0 to 6 6 to 10 10 to 12 to 16 to 20 to Hours 12 16 20 24 Load 50 60 70 60 80 50 (MW) Draw the load curve and Estimate: i. Maximum Load ii. Units generated per day iii. Average Load iv. Load Factor
2. Three series loads are drawing 20A ms current through a 60HZ source. Load 1 is an 400W, 0.8 lagging induction motor. Load 2 is a 500VA, 0.6 lagging power factor and load 3 is a 2 ohm incandescent bulb. a) What is the total VA of the combined load? b) What is the overall PF of the combined load? c) What RMS voltage is the combined load operating? d) What capacitor VAR must be installed in parallel to the combine load to improve its overall PF to unity? e) What is its approximate capacitance in microfarad?
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