Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 11, Problem 12RQ
What is the most important factor in the ionization of a gas?
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Solve completely question 3 and 5
A factory operates at 0.80 p. f. lagging and has a monthly demand of 750 Kva. The monthly power rate is Pesos 8.50 per Kva. To improve the power factor 250 Kva capacitors are installed in which there is negligible power loss. The installed cost of equipment is Pesos 20,000 and fixed charges are estimated at 10% per year. Calculate the annual savings effected by the use of capacitors.
An RLE load is operating in chopper circuit from a 500 V de source as shown in Fig. (I) For
R = 0, L = 0.064 and constant E, the duty cycle is 0.2
(a) Derive the expression for the lo(max) and lo(min) for type A chopper, supplying RLE load.
Also, derive the expression for The maximum peak to peak ripple current.
(b) Find the chopping frequency to limit the amplitude of load current excursion to 10 A.
Fig.(1)
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Chapter 11 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 11 - 1. Conduction in a liquid depends on the movement...Ch. 11 - What is a negative ion?Ch. 11 - 3. What is a positive ion?
Ch. 11 - Name three basic substances that can be used to...Ch. 11 - What is an electrolyte?Ch. 11 - 6. What is used to hold a sulfate ion together?
Ch. 11 - What is the negative terminal of a power source...Ch. 11 - Prob. 8RQCh. 11 - What determines the thickness of the coating...Ch. 11 - What is electrolysis?
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- Q1) An RLE load is operating in chopper circuit from a 500 V dc source as shown in Fig.(1) For R=0, L= 0.064 and constant E, the duty cycle is 0.2 (a) Derive the expression for the lo(max) and lo(min) for type A chopper, supplying RLE load. Also, derive the expression for The maximum peak to peak ripple current. (b) Find the chopping frequency to limit the amplitude of load current excursion to 10 A. Vs www R Fig.(1) Earrow_forward04) A converter is feeding an RL load as shown in Fig. 2 with Vs = 220 V, R = 52, L = 7.5 mH, f=1 kHz, d=0.5, and E=0 V. Calculate (a) the minimum instantaneous load current (b) the peak instantaneous load current, (c) the maximum peak-to-peak load ripple current, (d) the average value of load current la, (e) the rms load current lo, (f) the effective input resistance Ri seen by the source, (g) the rms chopper current, and (h) the critical value of the load inductance for continuous load current. Chopper FWD 500000 R Fig.2 LLarrow_forwardcontrol systemsarrow_forward
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