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Efficiency of Electric Motors LAP
Eddy Current Dynamometer, rated 300 hp, 8000 rpm max speed, connected to 100 hp motor under test.
The Efficiency of Electric Motors (EEM) laboratory accreditation program was originally developed at the request of the National Electrical Manufacturers Association (NEMA) to assist the electric motor industry in complying with the statutory requirements for electric motors in Section 431.36(a) of Title 10, Code of Federal Regulations (CFR) Part 431 (10 CFR Part 431). NVLAP coordinated the development of the EEM program with NEMA and the Department of Energy (DOE).
For information on the requirements of accreditation see NIST Handbook 150 which contains the general requirements for accreditation of laboratories. In addition, NIST Handbook 150-10 contains specific requirements for laboratories testing motors for energy efficiency.
Proficiency Testing Requirements
Section 7.7.2 of ISO/IEC 17025:2017 requires a laboratory “monitor its performance by comparison with results of other laboratories, where available and appropriate.” NVLAP is not aware of any widely available interlaboratory comparison for motor testing. Laboratories may choose to organize interlaboratory comparisons among themselves, but NVLAP does not require participation in interlaboratory comparison in the motors program. If an appropriate interlaboratory comparison becomes available, NVLAP may require participation and will notify all laboratories of requirements.
Requirements Documents
- NIST Handbook 150:2020, update 1, NVLAP Procedures and General Requirements
- NIST Handbook 150-10:2020, NVLAP Efficiency of Electric Motors
- Lab Bulletin LB-152-2023: Calibration of Phase in Power Meters
- Lab Bulletin LB-148-2023: Addition of IEC 60034-2-3:2020 and IEC 61800-9-2:2017 to the Efficiency of Electric Motors Laboratory Accreditation Program (LAP)
- Lab Bulletin LB-120-2020: Release of NIST Handbook 150-10, 2020 Edition
- Lab Bulletin LB-116-2020: Update to NVLAP accreditation documents for laboratories accredited to ISO/IEC 17025:2017 under the ILAC MRA
- Test Method Review Summary (Excel)
References and Information
Contacts
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(301) 975-6697