German kW requirements differ from U.S.?
German kW requirements differ from U.S.?
(OP)
We receive electrical specifications from German machine builders that list 2 different KW requirements (German & English). Is this because of 50hz vs 60hz?






RE: German kW requirements differ from U.S.?
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: German kW requirements differ from U.S.?
RE: German kW requirements differ from U.S.?
Probably closer to what dpc is saying. I would think it is related to the slight difference in DIN HP vs Mechanical HP. Since the the Mechanical HP can be converter to Watts, (roughly 746W/HP), they are also maybe converting the Metric HP to what they are thinking of as "German" Watts. A "Metric" HP is measured per DIN 70020, a German standard, and refers to the power at a flywheel. Everyone else uses Mechanical HP, which is slightly different. A metric HP is 98.6% of a Mechanical HP. So for converting to kW, 1 metric HP = 0.73549875 kW, while 1 Mechanical HP = .74569987158227022 kW (and for reference, 1 Electrical HP = .746 kW). Usually if it is an electric motor application, they should only be referring to electrical kW, but mechanical engineers can sometimes be fussy that way.
If this is a small machine someone is splitting hairs on you, but if you are speaking of something huge it can make a difference.
JRaef.com
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