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Compliance to 40th Harmonic Measurement Requirements in Recent 10 CFR 429 and 431 Revisions

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By Jamie Grooms July 6, 2016

The Department of Energy (DoE) issued changes to the requirements for determining pump energy for equipment driven by electric motors (10 CFR parts 429 and 431). The DoE issued a Notice of Proposed Rulemaking (NOPR EERE-2014-BT-TP-0054) therefore creating a similar revision to the standards for electrically driven air-compressors. The new standard requires accurate measurement of the input power up to at least the 40th harmonic of 60 Hz. The measurements are to be made at the input terminals of the device and include continuous or non-continuous controls, as applicable.

OSI has been the test provider of choice for a number of manufacturers in both the pump and air-compressor arenas and has received numerous questions regarding the necessary measurement capability. In response, a White Paper on the 40th harmonic was developed. In this White Paper, the new requirements and compliance evaluations of higher response OSI products are discussed.

The results of the compliance evaluations were positive as OSI discovered that DoE requirements can be met with existing commercial technology and will not require extensive test equipment development. To read a more extensive explanation on the 40th harmonic and the DoE changes visit (Click Here) Compliance to 40th Harmonic Measurement requirements in recent 10 CFR 429 and 431 revisions.



EERE-2014-BT-TP-0054 is an effective rule beginning February 3, 2017. The final rule changes will be mandatory for representations starting July 3, 2017.


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