Answer / c.s.padmanabhan

Adding total three phase KVA and total single phase KVA(without dividing by 3)will give net KVA demanded from the transformer.

when i am going to take trail on a 3ph sq.i/m motor 5.5kw, i observed that RPM of the motor is very low as compared to the rated RPM and also it rotates in clockwise in first ON command,and anticlock wise in second ON command. finally i observed that on phase is no available . but iam not clear about, why the motor is rotates in both directions without any phase interchanging.pls answer to my question.

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