Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter S, Problem 13RQ

Name three devices used to provide ground-fault protection.

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Q2/ An air-filled rectangular waveguide is to be used to transmit signals at a carrier frequency of 6 GHz. Choose its dimensions so that the cutoff frequency of the dominant TE mode is 80% of the carrier frequency 6GHz and that of the TE01 is 70%.
A three-phase half-wave converter in Figure 2 is operated from a three- phase Y-connected 208-V, 60-Hz supply and the load resistance is R = 10 2. If it is required to obtain an average output voltage of 50% of the maximum possible output voltage, calculate (a) the delay angle a. (b) the rms and average output currents. (c) the average and rms thyristor currents. (d) the rectification efficiency. a T₁ Van T₂ vbn Vcn m b K T3 * Fig.2 Vo fuw me ic R L
B. Find an expression for output dc voltage in single phase (fully controlled thyristor rectifier taking the effect of source inductance into consideration. wwwwwwww
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