Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Textbook Question
Chapter 11.5, Problem 9P
For the circuit of Fig. 11.16, determine the power factor of the combined loads if ZL = 10 Ω.
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A load of 500 kVA operates at 0.6 lagging power factor on 1100V, 50 Hz mains. The power factor of the system is improved from 0.6 lagging to 0.95 lagging by using a delta connected capacitor bank. Assuming VA of the load remains constant, indicate the rating of the capacitor and find the additional kW that can be obtained.
A load of 500 kVA operates at 0.6 lagging power factor on 1100 V, 50 Hz mains. The power factor of the system is improved from 0.6 lagging to 0.95 lagging by using a capacitor bank connected in delta. Assuming the KVA of the load remains constant, indicate the rating of the capacitor and find how much additional kW can be obtained.
A load of 500 kVA operates on 1100 V, 50 Hz mains with power factor of 0.6 lagging. It is required to improve the power factor to 0.95 lagging by using the star connected capacitor bank. Assuming that the load KVA remains constant, suggest the rating of the capacitors.
Chapter 11 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
Ch. 11.1 - A current source of 12 cos 2000t A, a 200 ....Ch. 11.2 - Given the phasor voltage across an impedance ,...Ch. 11.2 - Prob. 3PCh. 11.2 - Prob. 4PCh. 11.2 - A voltage source vs is connected across a 4...Ch. 11.3 - If the 30 mH inductor of Example 11.7 is replaced...Ch. 11.4 - Calculate the effective value of each of the...Ch. 11.5 - For the circuit of Fig. 11.16, determine the power...Ch. 11.6 - Prob. 10PCh. 11 - Prob. 1E
Ch. 11 - Determine the power absorbed at t = 1.5 ms by each...Ch. 11 - Calculate the power absorbed at t = 0, t = 0+, and...Ch. 11 - Three elements are connected in parallel: a 1 k...Ch. 11 - Let is = 4u(t) A in the circuit of Fig. 11.28. (a)...Ch. 11 - Prob. 6ECh. 11 - Assuming no transients are present, calculate the...Ch. 11 - Prob. 8ECh. 11 - Prob. 9ECh. 11 - Prob. 10ECh. 11 - The phasor current I=915mA (corresponding to a...Ch. 11 - A phasor voltage V=10045V (the sinusoid operates...Ch. 11 - Prob. 13ECh. 11 - Prob. 14ECh. 11 - Find the average power for each element in the...Ch. 11 - (a) Calculate the average power absorbed by each...Ch. 11 - Prob. 17ECh. 11 - Prob. 18ECh. 11 - Prob. 19ECh. 11 - The circuit in Fig. 11.36 has a series resistance...Ch. 11 - Prob. 21ECh. 11 - Prob. 22ECh. 11 - Prob. 23ECh. 11 - Prob. 24ECh. 11 - Prob. 25ECh. 11 - Prob. 26ECh. 11 - Prob. 27ECh. 11 - Prob. 28ECh. 11 - Prob. 29ECh. 11 - Prob. 30ECh. 11 - Prob. 31ECh. 11 - Prob. 32ECh. 11 - Prob. 33ECh. 11 - (a) Calculate both the average and rms values of...Ch. 11 - Prob. 35ECh. 11 - FIGURE 11.43 Calculate the power factor of the...Ch. 11 - Prob. 37ECh. 11 - Prob. 38ECh. 11 - Prob. 40ECh. 11 - Prob. 41ECh. 11 - Prob. 42ECh. 11 - Prob. 43ECh. 11 - Compute the complex power S (in polar form) drawn...Ch. 11 - Calculate the apparent power, power factor, and...Ch. 11 - Prob. 46ECh. 11 - Prob. 48ECh. 11 - Prob. 49ECh. 11 - Prob. 50ECh. 11 - Prob. 51ECh. 11 - Prob. 52ECh. 11 - FIGURE 11.49 Instead of including a capacitor as...Ch. 11 - Prob. 54ECh. 11 - A load is drawing 10 A rms when connected to a...Ch. 11 - For the circuit of Fig. 11.50, assume the source...Ch. 11 - Prob. 57ECh. 11 - A source 45 sin 32t V is connected in series with...Ch. 11 - Prob. 60ECh. 11 - FIGURE 11.51 The circuit in Fig. 11.51 uses a Pi...Ch. 11 - Prob. 62ECh. 11 - Prob. 63ECh. 11 - You would like to maximize power transfer to a 50 ...
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- The two wattmeters in Fig. 11.20 can be used to compute the total reactive power of the load. Prove this statement by showing that 3(W2−W1)=3VLIL sinθϕ.arrow_forwardProblem 11.34. At full load, a commercially available 106 hp, three-phase induction motor operates at an efficiency of 96% and a power factor of 0.87 lag. The motor is supplied from a three-phase outlet with a line-voltage rating of 208 V. 1. What is the magnitude of the line current in Ampere drawn from the 208 V outlet? (1 hp = 746 W). 2. Calculate the reactive power in kVAR supplied to the motor.arrow_forwardWhen drawing three-phase inductive 250 kW from the 440 V transmission line, the power coefficient is 0.707. When a three-phase parallel 60 kVAR capacitor group is connected to this load, find the current drawn from the line and the power coefficient?arrow_forward
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