EBK ELECTRICAL TRANSFORMERS AND ROTATIN
4th Edition
ISBN: 9781337025867
Author: Herman
Publisher: VST
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Question
Chapter 9, Problem 4RQ
To determine
The voltage applied to the load.
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HW8
A shaft fitted with a flywheel rotates at 650 r.p.m. and drives a machine. The
torque of machine varies in a cyclic manner over a period of 2 revolutions. The
torque rises from 650 N-m to 2200 N-m uniformly during 110° and remains
constant for the following 270°. It then falls uniformly to 600 N-m during the next
100° and remains constant for the end cycle, the cycle being repeated thereafter.
Determine the power required to drive the machine and percentage fluctuation in
speed, if the driving torque applied to the shaft is constant and the mass of the
flywheel is 180 kg with radius of gyration of 35 cm.
HW9
units of h. show all work
4. Steam flows steadily through a turbine at a rate of 47,000 lbm/h, entering at 1000 psia
and 800°F and leaving at 6 psia as saturated vapor. If the power generated by the
turbine is 3.7 MW, determine the rate of heat loss from the steam.
Chapter 9 Solutions
EBK ELECTRICAL TRANSFORMERS AND ROTATIN
Ch. 9 - How does the National Electrical Code specify that...Ch. 9 - An open-delta three-phase transformer system has...Ch. 9 - If a single-phase load is connected across the two...Ch. 9 - Prob. 4RQCh. 9 - A three-phase transformer connection has a...Ch. 9 - A three-phase transformer bank has the secondary...Ch. 9 - A three-phase transformer bank has the primary and...Ch. 9 - Prob. 8RQ
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