EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780176919962
Author: Herman
Publisher: VST
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Chapter 47, Problem 3RQ
To determine
The full load current rating of the motor and the minimum size NEMA and IEC starters that should be used for a 3/4 horse power single phase squirrel cage motor that is connected to 240 V ac line
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where M1=0.41m, M2=1.8m, M3=0.56m, please use bernoulis equation where necessary and The solutions should include, but not be limited to, the equations used tosolve the problems, the charts used to solve the problems, detailed working,choice of variables, the control volume considered, justification anddiscussion of results etc.If determining the friction factor, the use of both Moody chart and empiricalequations should be used to verify the validity of the value.
Q3. The attachment shown in Fig.2 is made of 1040 HR. Design the weldment
(give the pattern, electrode number, type of weld, length of weld, and leg size).
All dimensions in
mm
120
Fig.2
12
17
b =7.5
5 kN
60
60°
15 mm
DA
100 mm
50 mm
Assuming the load applied P 80 kN. Determine the
maximum stress in the bar shown assuming the diameter of the
whole A is DA = 25 mm.
Chapter 47 Solutions
EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
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