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#2255 - 06/29/01 07:37 PM dc shunt motor  
frank  Offline
Member
Joined: May 2001
Posts: 374
windsor ontario canada
what will happen if you lose the shunt field
on a dc shunt motor


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#2256 - 06/30/01 11:00 AM Re: dc shunt motor  
donles  Offline
Member
Joined: Apr 2001
Posts: 83
Pennsylvania
Quote
Originally posted by frank:
what will happen if you lose the shunt field
on a dc shunt motor


I think it will overspeed. Generally, there is a field loss relay in series with the field that would open the control circuit if it were to drop out.


#2257 - 06/30/01 01:02 PM Re: dc shunt motor  
frank  Offline
Member
Joined: May 2001
Posts: 374
windsor ontario canada
ok good because thats what i put on the exam.
i no a series motor will overspeed but i was not sure about a shunt thanks


#2258 - 09/02/01 08:48 AM Re: dc shunt motor  
bordew  Offline
Member
Joined: Aug 2001
Posts: 142
Vienna,Ohio, USA
Quote
Originally posted by frank:
ok good because thats what i put on the exam.
i no a series motor will overspeed but i was not sure about a shunt thanks


If you oopen the field switch to a shunt motor if will take off and self-destruct, this is why they put a field-loss relay in the control circcuit to prevent this from happening.



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