Connect 1 Semester Access Card For Electric Motors And Control Systems
2nd Edition
ISBN: 9781259550195
Author: Petruzella, Frank
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 2.4, Problem 1RQ
Interpret what each of the following pieces of name-plate information specifics:
a. Voltage rating
b. Current rating
c. Phase rating
d. Motor speed
e. Ambient temperature
f. Temperature rise
g. Insulation class
h. Duty cycle
i. Horsepower rating
j. Code letter
k. Design letter
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A factory has the following load with power factor of 0.85 lagging in each phase.
Between the red and yellow phases 40 A, between the yellow and blue phases 50 A,
and between the blue and red phases 60 A. If the supply is 415 V, three-phase,
calculate the line currents. Draw a phasor diagram for phase and line quantities. Ensure to draw all necessary diagrams
ANS: IR
= 87.178<-68.380 A; IY = 78.102<-178.120 A; IB = 95.394<61.210 A.
Answer question D only using by hand
first darw cylinder then calculate show me st
The phase currents in a delta-connected three-phase
load are as follows: between the red and yellow lines,
30 A at p.f. 0.707 leading; between the yellow and blue
lines, 20 A at unity p.f.; between the blue and red
lines, 25 A at p.f. 0.866 lagging. Calculate the line
currents and draw the complete phasor diagram.
ANS:
21.6 A in R, 49.6 A in Y, 43.5 A in B
Chapter 2 Solutions
Connect 1 Semester Access Card For Electric Motors And Control Systems
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