The moving part of an electrical machine was allowed to remain at rest sufficiently long to acquire the same temperature as that of the room (23 oC),The resistance of the copper winding was then measured and found to be 0.18 ohm. A second measurement was taken of the same winding after the machine has been operated for a period of time and because of the normal heating, the resistance rose to 0.206 ohm. Calculate the temperature and temperature rise of the winding.
The moving part of an electrical machine was allowed to remain at rest sufficiently long to acquire the same temperature as that of the room (23 oC),The resistance of the copper winding was then measured and found to be 0.18 ohm. A second measurement was taken of the same winding after the machine has been operated for a period of time and because of the normal heating, the resistance rose to 0.206 ohm. Calculate the temperature and temperature rise of the winding.
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Transcribed Image Text:. The moving part of an electrical machine was
allowed to remain at rest sufficiently long to
acquire the same temperature as that of the
room (23 oC),The resistance of the copper
winding was then measured and found to be
0.18 ohm. A second measurement was taken of
the same winding after the machine has been
operated for a period of time and because of the
normal heating, the resistance rose to 0.206
ohm. Calculate the temperature and temperature
rise of the winding.
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