Answer Posted / niks_4u86

i think it has to be AC as to reduce the reluctance for flux the air gap provided gets the size of AC motor greater than the size of dc motor insulation

Testing report of Earthing of 3.15 MVa PTR.

2638

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ELECTRICAL ENGINEER TEST IN FEWA ANY ONE HAVE KNOWLEDGE ABOUT THIS?????????

1089

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generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...

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1364

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what is the benefit of floating our DC source? if i have two floating DC source of which 1 has a ref voltage of -21VDC and the other of -18VDC. can it be connected in parallel to share a common ref voltage? if not, how do i make both sources to be of common ref voltage? tks

1949

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