Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 21, Problem 12RQ
To determine
The size of the conductor required to supply all the motors.
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Students have asked these similar questions
A (21 HP, 3-Phase, 380 volts) motor with an efficiency of 95% is operating at a load
factor of 0.63. What is the input current (Amperes) when the power factor is 89%? (1
HP = 0.75 kW)
Question 2
Beli vifth
Slack side
Motor
(imprut)
Tight side
Beli thickpess\
Centre distance
Figure 2
Figure 2 shows an open flat belt drive connected to a motor and a pulley. The
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at 850 r/min to a second pulley rotating at 400 r/min. The distance between
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coefficient of friction for both pulleys is 0,3.
Determine:
2.1. The diameter of the second pulley.
2.2. The length of the belt.
3.3. The width of the belt taking centrifugal tension into account.
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lagging power factor and 80 9% efficiency. What is the magnitude of the RMS motor
current?
O 75 Amps
15 Amps
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O 3 Amps
Chapter 21 Solutions
Electrical Transformers and Rotating Machines
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