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A dc motor running on dc drive whose input is 3ph AC what
will happen if we change the phase sequence of dc drive for
e.g (R Y B) is connect as R B Y, will the motor run as same
as previously running before changing phase without any effect
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Answer Posted / arun kokje
I HAVE GIVEN MY ANSWER AS YES BECAUSE BY CHANGING AC INPUT
PHASES THE POLARITY OF DC OUTPUT SHALL REMAIN SAME HENCE NO
CHANGE IN DIRECTION OF MOTOR. I HAVE ONE QUESTION AS WHAT
WILL HAPPEN IF THE DC DRIVE OF SAY 300HP MOTOR WILL VRUN
THROUGH 1250KVA CAPACITY D.G. SET INSTEAD OF RUNNING ON
GRID. I RUN ON GRID WHEN IT WAS RUNNING SMOOTH BUT WHEN I
RUN ON DG SET IT WAS GIVING HUNTING IN VOLTS,CURRENT AND SPEED.
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