An electric motor may be protected against short circuits by what means ?

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An electric motor may be protected against overload by what means ?
Posted by:
LABIB KOOLI
07-February-2015

Pick up the right choices

A. Fuse

B. Contactor

C. Magnetic-only circuit breaker

D. Thermal sensor or electronic multi-function relay

Maintenance Engineering Preventive Maintenance Project Management génie électrique Ingénierie

Question added by LABIB KOOLI , Director of the Sectoral Center for Training in Hotel Technologies at Southern Hammamet , Tunisian Vocational Training Agency (ATFP)
Date Posted: 2015/02/07

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15 Answers

by Mahmood Shaikh , Assistant Manager Electrical & Instumetation (E&I) , Aisha Steel Mills Private Limited (Steel Industry)

Yes I agree with those who had answered A & C

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by Deleted user

Thanks Mr. Labib

I think choice A&C

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by Ali Waqas Bhatti , Electrical Engineer , Lakson Group of Companies

fuse as well as circuit breaker ..............

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by Mohamed Hamdy Kamal Riad , Senior Solution Architect , IBM

Damage from short circuits can be reduced or prevented by employing fuses, circuit breakers, or other overload protection, which disconnect the power in reaction to excessive current .

So Answer is

A. Fuse

C. Magnetic-only circuit breaker

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by Deleted user

Thanks Mr. Labib

I guess Choice D

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by Ridha SAIDANI , Maintenance Manager , SOMIPHOS / Technical Direction

Protected by : A fuse or a magnetic-only circuit breaker

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by LABIB KOOLI , Director of the Sectoral Center for Training in Hotel Technologies at Southern Hammamet , Tunisian Vocational Training Agency (ATFP)

An electric motor may be protected against short circuits by : A fuse or a magnetic-only circuit breaker

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by Elke Woofter , Project Assistant , American Technical Associates

I believe the answers are A and B

A. Fuse

C. Magnetic-only circuit breaker

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by Paul Bryson , UPS Service Engineer , Emerson Network Power

Fuses can be used but I would suggest a magnetic circuit breaker. You would have to look into the close & breaking requirements for the best solution.

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