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I have 1 KW, 3ph. 440v, 50 hz, cos(phi) .75, efficiency
75%(star delta connection)Motor. How to calculate line
current & Phase current (1) Star connection (2) delta
Connection
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Answer Posted / 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.
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