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NC-2009 EAp2:Minimum Energy Performance

Motor Efficiencies for projects outside the US

I was wondering whether anyone has come across the motor efficiency issue for projects outside the US. We have a project in EU and the motor efficiencies are different to the ones shown on 90.1 mandatory provisions on 10.4 (Table 10.8) because of the difference of the frequencies; 50Hz in EU versus 60 Hz in US. There is this article (http://www.reliableplant.com/Read/19531/harmonizing-international-motor-efficiency-stards) that compares the European Standard with the US EPAct ‘92 and says that the IE2 (International Efficiency 2) is equivalent to U.S. EPAct for 60 Hz. The design team has specified motors with IE2. Would the project meet the mandatory provisions on 10.4 if these motors are installed? Many thanks for any help provided.

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Thu, 03/01/2012 - 13:16

It sounds like you could demonstrate equivalency.

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