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how to calculate the over current rating of 3phase motor

Answers were Sorted based on User's Feedback



how to calculate the over current rating of 3phase motor..

Answer / k.prakashchandra

Over current rating depends on cooling efficiency of the
motor.e.g. A few Coimbatore motors can run at upto even 150
% of rated load continuously.To set the over load
relay,calculate full load current and add 5 or 10% so that
it does not trip on full load.

Is This Answer Correct ?    2 Yes 0 No

how to calculate the over current rating of 3phase motor..

Answer / dk gnfc

Overcurrent means short ckt in CTMM relay for motor protection, so short ckt settinng alway 700 to 1300% in every 3 phase motor

Is This Answer Correct ?    0 Yes 0 No

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