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In shunt and compound motor starting the shunt field should be made on with full starting resistance in ____________(a) Series with field(b) Parallel with field(c) Series with armature(d) Parallel with armatureI had been asked this question in a job interview.I'd like to ask this question from Starting of DC Motors topic in section DC Motors of DC Machines

Answer»

Correct answer is (c) SERIES with armature

For explanation I WOULD say: In SHUNT and compound motors starting the shunt field should be switched on with full starting resistance in armature CIRCUIT. A short time delay in this position ALLOWS the field current to build up to the steady value of the inductive field transients.



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