Answer / s c budhiraja

(1) First for star connections:line
current=1000/.75*1.73*.75*440=1.75 A for both line &
phase.

(2) For delta connections; Line current=1.75A

Phase current=1.75/1.73=1A

Note: There no use of Motor efficiency here.

Answer / michael

NOTE : YOU NEED MOTOR EFFICIENCY
BECAUSE IF THERE IS A RATING GIVEN
IN TERMS OF KW. IT IS ALWAYS THE
OUTPUT POWER OF THE MOTOR..
SO WEE NEED TO CONVERT IT TO
INPUT POWER IN ORDER TO COMPUTE THE
CURRENT.

I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

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