A 240 V dc motor on brake test took 52 Amp when running at 1500 rpm. The spring balance at the end of the 76 cm brake arm reads 93.5 N. What is the efficiency of the motor at this load. [Ans. 90 %]
A 240 V dc motor on brake test took 52 Amp when running at 1500 rpm. The spring balance at the end of the 76 cm brake arm reads 93.5 N. What is the efficiency of the motor at this load. [Ans. 90 %]
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter29: Dc Generators
Section: Chapter Questions
Problem 1PA: You are working as an electrician in a large steel manufacturing plant, and you are in the process...
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A 240 V dc motor on brake test took 52 Amp when running at 1500 rpm. The spring balance at the end of the 76 cm brake arm reads 93.5 N. What is the efficiency of the motor at this load. [Ans. 90 %]
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