what is the difference between line & phase current in star delta connection motor?
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Answer / e. segovia
In 3ph star connections we can prove by means of drawings
or maths methods that Line current = SQRT(3)*Phase
current, and in delta connections Line current = Phase
current, that is why we use star-delta connection for
heavy motor startings. This means we can lower the current
at starting and then after having overcome the system
inertia we swap to delta connection. worth mentioning that:
In delta, Line voltage = Phase voltage
In star, Line voltage = SQRT(3)*Phase voltage.
Is This Answer Correct ? | 4 Yes | 1 No |
Answer / ald
Star connection--- Line current = phase current
Line voltage = phase voltage x 1.732
Delta connection --- Line voltage = Phase voltage
Line current = phase current x 1.732
Is This Answer Correct ? | 2 Yes | 0 No |
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