A delta connected motor in the following link: http://www.vanbodegraven.nl/en/products/ac-motors/asea-mbg-200-m-60-6/
has rated current 47A, voltage 380V
Here is the rated values. Cos(fi) = 0.8 on the label.
So the power I calculate is = sqrt(3)*380*47*cos(fi) = 24747 is around 25kw
But AS YOU SEE the label stated rated power 22kw
Why my calculation does not match the rated power?