Power safe for motor?

Question

If the needed I = 11A to move an exhaust, Now the motor I have with spec. of 33 kW and 28 A, If I want to replace it with motor of 11 kW and 13. Does it helps reducing Power needed ?

Answer 1

(33,000 W)/(28 A) ≈ 1,180 V

(11,000 W)/(13 A) ≈ 846 V

1,180 V => 1200 V @ 0.95 pf

846 V => 1,200 V @ 0.71 pf

This is a reasonable pf reduction withe the decrease in KW.

Your question is somewhat confusing.  Do you need 11 A or 11 KW for moving your exhaust?

In any case the smaller motor is likely the better selection, as the pf I calculated for the larger motor is at rated load, and its pf would also drop to near 0.71 with the reduced load.

Answer 2

ya it will be but the motor gets loaded up it is safe to use 33kw 28A becoz those would be theorotical values so better to us the one u specified