How to define DC Motor horse power?

We have dc motor with following data (unclomplete name plate):
Field:
Amp: 1.12 Volt: 200
Armature:
Amp: 0.6 Volt: 400
How to defini motor horse power? We need Reliance Flexpak 3000 dc regen drive for above motor.
Any idea?
Thank you.
Charly

That's fractional... about 240Watts, or approximately 1/3 HP.

The simple method would be to use the 400 volts and the .6 amps to find the right drive. The data sheet on page 6 lists voltage and current. http://www.reliance.com/prodserv/standriv/dc/flexpak/lit/d2882.pdf

You sure it says .6 amps, that would be only 240 watt motor, using simple equations you would divide 240 by 746 which would say 1/3 HP. To explain I got watts by multiplying .6a and 400v which game me 240 watts to obtain HP you use 746watts (which equals 1HP) to divide into 240...ie 1/3HP....a FlexPak 3000 would be overkill for that.

If you are mistaken and its actually 6 amps then you are looking at approximately 3HP.

A motor formual page: http://www.patchn.com/motorformula.htm