A dc series machine rated at 200V, 100A has an armature resistance of 0.12 and field resistance of 0.150. The friction and windage loss is 1500W. Use a Vrase of 200V and an Isare of 100A. Use the above information to answer Q17 – Q21
A dc series machine rated at 200V, 100A has an armature resistance of 0.12 and field resistance of 0.150. The friction and windage loss is 1500W. Use a Vrase of 200V and an Isare of 100A. Use the above information to answer Q17 – Q21
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:A d.e, series machine rated at 200V, 100A has an armature resistance of 0.12 and field
resistance of 0.15 Q. The friction and windage loss is 1500W . Use a Vaace of 200V and
an Isne of 100A . Use the above information to answer Q17 – Q21
17.
Calculate the per unit value of the total series resistance of the machine.
a) 0.125
b) 0.135
c) 0.145
d) 0.155
none
18.
Calculate the per unit value of the friction and windage loss.
a) 0.092
b) 0.075
c) 0.032
d) 0.015
e) none
Calculate the per unit value of the total series resistance loss at the rated load.
19.
3
a) 0.551
b) 0.356
c) 0.532
d) 0.650
none
20.
Calculate the per unit value of the total power loss at the rated load.
a) 0.30
b) 0.20
c) 0.15
d) 0.50
e) none
21.
Calculate the per unit value of the efficiency of the machine.
a) 0.47
b) 0.83
c) 0.89
d)0.65
e) none
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