Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 26, Problem 3PA
You are an electrician working in an industrial plant. A 30-hp three-phase induction motor has a current draw of 36 amperes at full load. The motor is connected to a 480-volt line. A three-phase wattmeter indicates a true power of 22 kW. Determine the power factor of the motor and the amount of capacitance needed to correct the power factor to
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You are an electrician working in an industrial plant. A 30-hp three-phase induction motor has a current draw of 36 amperes at full load. The motor is connected to a 480-volt line. A three-phase wattmeter indicates a true power of 22 kW. Determine the power factor of the motor and the amount of capacitance needed to correct the power factor to 95%. Also determine the minimum voltage rating of the capacitors. The capacitors are to be connected in wye.
Determine the value of the capacitor to raise the power factor to unity when two induction motor must be connected to a capacitor . The first motor is twenty-four kilo watts and power factor 0.8, while the other is forty kilo watts and power factor 0.95.
2, In a circuit, the capacitance of a
capacitor is 3.2 microfarads and the
rms voltage of the generator is 50
volts. Frequency
(a) 100 Hz
and (b) what is the rms current in the
circuit when it is 1000 Hz?
Chapter 26 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 26 - How many degrees out of phase with each other are...Ch. 26 - What are the two main types of three-phase...Ch. 26 - A wye-connected load has a voltage of 480 V...Ch. 26 - A wye-connected load has a phase current of 25 A....Ch. 26 - A delta connection has a voltage of 560 V...Ch. 26 - A delta connection has 30 A of current flowing...Ch. 26 - A three-phase load has a phase voltage of 240 V...Ch. 26 - If the load in Question 7 is connected in a wye,...Ch. 26 - An alternator with a line voltage of 2400 V...Ch. 26 - What is the apparent power of the circuit in...
Ch. 26 - You are working in an industrial plant. A bank of...Ch. 26 - You are a journeyman electrician working in an...Ch. 26 - You are an electrician working in an industrial...Ch. 26 - Refer to the circuit shown in Figure 26-19 to...Ch. 26 - Refer to the circuit shown in Figure 26-20 to...Ch. 26 - Refer to the circuit shown in Figure 26-21 to...Ch. 26 - Refer to the circuit shown in Figure 26-22 to...
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