What does it mean by a 25 kW electrical motor?

Question

Does it mean it consumes 25 kW or its output shaft power is 25 kW?

Power consumed by a motor and output shaft power can not be same as there are mechanical losses.

Please give me reference with your answer if possible.

Answer 1

The USA NEMA motor standard requires the horsepower output to be marked on the nameplate. I am certain that the IEC motor standard requires the kW output to be marked on the nameplate, but I have been unable to find a reference to confirm that.

The NEMA standard is MG1

http://www.nema.org/stds/mg1condensed.cf...

Edit 1

Here is a source for IEC motors:

“According to IEC 34-1 from 1969 and VDE 0530, the rating plate contains … Rated output in kW”

Motor ABC

For SIEMENS Low-Voltage Three Phase Motors

Downlosd PDF file:

http://www2.sea.siemens.com/NR/rdonlyres...

Answer 2

It outputs 25kW of energy through the shaft.