Question

a motor has a thermal heating time constant of 45 mins. When the motor runs continuous of full scale, its final temperature rise is 80° C, what would be the temperature rise after 1 hour, if the motor runs continuously on full load?
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Answer 1

Answer:

t=60

tH=50

t/tH=60/50

t/tH=1.2

T=80(1-e^-1.2)

T=55.9 degree celsius

Explanation: