Answer / sarbajeet jena

Since the excitation emf is zero, heavy currents would be drawn by the armature if connected to the rated voltage supply. Also, if the voltage is large, the reluctancetorque due to saliency may bring the rotor in synchronism with the rotating flux (ie.the synchronous machine will run as a reluctance motor)

my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

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I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id:upendrakrishna20@gmail.com,plz send me ,or send any other rrb papers plzzzzzzzzzzzzzzzzzz

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