If shunt motor is started with its field winding open then it will rotate at dangerously high speed

Q.  If a shunt motor is started with its field winding open then
- Published on 23 Oct 15

a. It will rotate at the same speed as that with its field winding closed
b. It will rotate at less speed as that with its field winding closed
c. It will rotate at dangerously high speed
d. None of these

ANSWER: It will rotate at dangerously high speed
 

    Discussion

  • UMESH PRABHU   -Posted on 18 Jun 17
    When shunt field is opened flux become zero as speed is inversely proportional to flux therefore it runs at dangerously at high speed

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