1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA PREMIUMGeneral Specification forConsultants, Industrialand Municipal: NEMAPremium EfficiencyElectric Motors General Specification for Consultants, Industrial and Municipal: NEMA Premium Efficiency Electric Motors 2014 Nation
2、al Electrical Manufacturers Association 2014 National Electrical Manufacturers Association General Specification for Consultants, Industrial and Municipal: NEMA PremiumEfficiency Electric Motors Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Vi
3、rginia 22209 www.nema.org 2014 National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American copy
4、right conventions. NEMA Premium 2014 Page ii 2014 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by a consensus among persons engaged in its development at the time it was approved. Consensus does not necessari
5、ly mean there was unanimous agreement among every person participating in the development process. The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of which the document herein is one, are developed through a voluntary standards development process. This
6、 process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. Although NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the documents, nor does it indep
7、endently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature, whether special, indirect, consequen
8、tial, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no wa
9、rranty that the information in this document will fulfill any particular purpose(s) or need(s). NEMA does not undertake to guarantee the performance of any individual manufacturers or sellers products or services by virtue of this standard or guide. In publishing and making this document available,
10、NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek
11、the advice of a competent professional in determining the exercise of reasonable care in any given circumstance. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or information not co
12、vered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of compliance with a
13、ny health- or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. NEMA Premium 2014 Page iii 2014 National Electrical Manufacturers Association TABLE OF CONTENTS Page Foreword.iv 1 GENERAL.1 2 DESI
14、GN STANDARDS.1 3 SERVICE CONDITIONS.1 3.1 Usual Service Conditions1 4 ENCLOSURES.1 5 ELECTRICAL DESIGN1 6 MECHANICAL DESIGN.2 6.1 Bearings. 2 6.2 Lubrication2 6.3 Other2 6.4 Accessories (When Specified).2 7 SUBMITTAL DATA REQUIRED.2 8 TESTS (IN ADDITION TO MANUFACTURERS STANDARD TESTS) .2 ANNEXES An
15、nex A NEMA MG 1-2014 Table 12-12, Full-Load Efficiencies for 60 Hz Premium Efficiency Medium Electric Motors Rated 600 Volts or Less (Random Wound) .3 Annex B NEMA MG 1-2014 Table 12-13, Full-Load Efficiencies for 60 Hz Premium Efficiency Medium Electric Motors Rated 5000 Volts or Less (Form Wound).
16、5 Annex C NEMA MG1-2014 Table 20-B Full-Load Efficiencies For 60 Hz Premium Efficiency Large Electric Motors Rated 600 Volts Or Less (Random Wound) .6 Annex D NEMA MG1-2014 Table 20-C Full-Load Efficiencies For 60 Hz Premium Efficiency Large Electric Motors Rated 5000 Volts Or Less (Form Wound) 7 NE
17、MA Premium 2014 Page iv 2014 National Electrical Manufacturers Association Foreword In the preparation of this publication, input of users and other interested parties has been sought and evaluated. Inquiries, comments, and proposed or recommended revisions should be submitted to the concerned NEMA
18、product Subdivision by contacting the following: Senior Technical Director, Operations National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, VA 22209 This publication was developed by the Motors and Generators Section. Section approval of the document does not nece
19、ssarily imply that all section members voted for its approval or participated in its development. At the time it was approved, the Section was composed of the following members: Baldor Electric Company Fort Smith, AR Brook Crompton North America Toronto, Canada Cummins, Incorporated Minneapolis, MN
20、Nidec Motor Corporation St. Louis, MO GE Industrial Systems Fort Wayne, IN Howell Electric Motors Plainfield, NJ Peerless-Winsmith, Incorporated Warren, OH Regal-Beloit Corporation Beloit, WI SEW-Eurodrive, Incorporated Lyman, SC Siemens Industry Incorporated Norwood, OH Sterling Electric, Incorpora
21、ted Irvine, CA TECO-Westinghouse Motor Company Round Rock, TX The Imperial Electric Company Akron, OH Toshiba International Corporation Houston, TX WEG Electric Corp Duluth, GA NEMA Premium 2014 Page 1 2014 National Electrical Manufacturers Association 1 GENERAL The intent of this specification is t
22、o outline the minimum requirements for three-phase ac induction motors applied to municipal and industrial applications for operation on voltages 5000 volts or less, rated 2500HP or less, operating more than 2000 hours per year at 75% of full-load. 2 DESIGN STANDARDS In addition to this specificatio
23、n, equipment shall comply with the current applicable standards promulgated by the following organizations: AFBMA Anti-Friction Bearing Manufacturers Association ANSI American National Standards Institute ASTM American Society of Testing Materials AWWA American Water Works Association IEEE Institute
24、 of Electrical and Electronics Engineers (Testing) HI Hydraulic Institute NEMA National Electrical Manufacturers Association NEMA MG 1 3 SERVICE CONDITIONS 3.1 Usual Service Conditions a) Ambient temperature not greater than 40C and not less than -15C. b) Voltage variation within +/- 10%. c) Frequen
25、cy variation within +/- 5%. d) Combination of b) and c) above, not to exceed 10%. e) Exposure to an altitude that does not exceed 3300 feet (1000 meters). f) Installation on a rigid mounting surface. g) Installation in areas or supplementary enclosures, which do not seriously interfere with the vent
26、ilation of the motor. 4 ENCLOSURES General purpose horizontal motors for indoor operation in a clean environment can be ODP (Open Dripproof). General purpose horizontal motors for outdoor operation or located in hostile non-hazardous environments shall be “Enclosed“ or “Weather Protected”. All motor
27、s in hazardous locations shall be approved for the application and meet the Class and Group as required by the area classification. 5 ELECTRICAL DESIGN Motors shall be rated continuous duty. Insulation system shall be rated minimum Class B (130C). Maximum temperature rise by resistance at rated HP s
28、hall not exceed Class B limits (80C). For motors rated at 1.15 Service Factor or higher, the maximum temperature rise by resistance at the rated Service Factor load shall not exceed Class F limits (115C). For medium motors the speed/torque and speed/current characteristics shall comply with NEMA Des
29、ign A or B, as specified on the request for quote. Motors shall be suitable for full voltage starting, unless otherwise specified. Motors shall meet the requirements of NEMA PREMIUM. (See Annexes.) Motors applied to variable frequency drives shall adhere to NEMA MG 1, Part 30 Application Considerati
30、ons for Constant Speed Motors Used on a Sinusoidal Bus with Harmonic Content and General Purpose Motors Used NEMA Premium 2014 Page 2 2014 National Electrical Manufacturers Association with Adjustable-Voltage or Adjustable-Frequency Controls or Both, or Part 31, Definite-Purpose Inverter-Fed Polypha
31、se Motors. 6 MECHANICAL DESIGN 6.1 Bearings Bearings shall be rated for a minimum of 26,280 hours L-10 life at full-load direct-coupled, except vertical high thrust motors. Vertical motors shall be capable of withstanding a momentary up-thrust of at least 30% of normal down-thrust. 6.2 Lubrication G
32、rease lubricated bearings shall be designed for electric motor use. Grease shall be capable of higher temperatures associated with electric motors and shall be compatible with Polyurea-based greases. Grease fittings, if provided, shall be Alemite type (or equivalent). Oil lubricated bearings, when s
33、pecified, shall have an externally visible sight glass to view oil level. Shielded bearings with regreasable provisions are permissible. 6.3 Other Vibration shall not exceed 0.15 inch per second, unfiltered peak. Noise level shall meet the requirements of the application. Motors (180 frame and large
34、r) shall have provisions for lifting eyes or lugs capable of a safety factor of 5. All external fasteners shall be corrosion-resistant. 6.4 Accessories (When Specified) Anti-condensation heaters shall keep motor windings at least 5C above the ambient temperature. Winding thermostats shall be normall
35、y closed, connected in series. Grounding provisions shall be in the main terminal box. 7 SUBMITTAL DATA REQUIRED Description of product. Motor nameplate information. Motor performance data (curves or listed data of torque and current as a function of speed; current, efficiency, power factor, and spe
36、ed as a function of load). Motor dimensional drawings, including coupling of hollow shaft. Motor parameters required for the determination of the Reed Critical Frequency of vertical hollow shaft motors. 8 TESTS (IN ADDITION TO MANUFACTURERS STANDARD TESTS) When specified, provide report of routine t
37、ests per NEMA MG 1. When specified, conduct efficiency test and speed torque test with report. (IEEE 112, Method B) When specified, conduct noise test with report. (Per NEMA MG 1 Part 9) NEMA Premium 2014 Page 3 2014 National Electrical Manufacturers Association Annex A NEMA MG1-2014 Table 12-12 FUL
38、L-LOAD EFFICIENCIES FOR 60 HZ PREMIUM EFFICIENCY MEDIUM ELECTRIC MOTORS RATED 600 VOLTS OR LESS (RANDOM WOUND) Open Motors 2 Pole 4 Pole 6 Pole 8 Pole HP Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Effic
39、iency 1 77.0 74.0 85.5 82.5 82.5 80.0 75.5 72.0 1.5 84.0 81.5 86.5 84.0 86.5 84.0 77.0 74.0 2 85.5 82.5 86.5 84.0 87.5 85.5 86.5 84.0 3 85.5 82.5 89.5 87.5 88.5 86.5 87.5 85.5 5 86.5 84.0 89.5 87.5 89.5 87.5 88.5 86.5 7.5 88.5 86.5 91.0 89.5 90.2 88.5 89.5 87.5 10 89.5 87.5 91.7 90.2 91.7 90.2 90.2
40、88.5 15 90.2 88.5 93.0 91.7 91.7 90.2 90.2 88.5 20 91.0 89.5 93.0 91.7 92.4 91.0 91.0 89.5 25 91.7 90.2 93.6 92.4 93.0 91.7 91.0 89.5 30 91.7 90.2 94.1 93.0 93.6 92.4 91.7 90.2 40 92.4 91.0 94.1 93.0 94.1 93.0 91.7 90.2 50 93.0 91.7 94.5 93.6 94.1 93.0 92.4 91.0 60 93.6 92.4 95.0 94.1 94.5 93.6 93.0
41、 91.7 75 93.6 92.4 95.0 94.1 94.5 93.6 94.1 93.0 100 93.6 92.4 95.4 94.5 95.0 94.1 94.1 93.0 125 94.1 93.0 95.4 94.5 95.0 94.1 94.1 93.0 150 94.1 93.0 95.8 95.0 95.4 94.5 94.1 93.0 200 95.0 94.1 95.8 95.0 95.4 94.5 94.1 93.0 250 95.0 94.1 95.8 95.0 95.8 95.0 95.0 94.1 300 95.4 94.5 95.8 95.0 95.8 95
42、.0 350 95.4 94.5 95.8 95.0 95.8 95.0 400 95.8 95.0 95.8 95.0 450 96.2 95.4 96.2 95.4 500 96.2 95.4 96.2 95.4 NEMA Premium 2014 Page 4 2014 National Electrical Manufacturers Association Annex A (Continued) NEMA MG1-2014 Table 12-12 (Continued) FULL-LOAD EFFICIENCIES FOR 60 HZ PREMIUM EFFICIENCY MEDIU
43、M ELECTRIC MOTORS RATED 600 VOLTS OR LESS (RANDOM WOUND) Enclosed Motors 2 Pole 4 Pole 6 Pole 8 Pole HP Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency 1 77.0 74.0 85.5 82.5 82.5 80.0 75.5 72.0 1.
44、5 84.0 81.5 86.5 84.0 87.5 85.5 78.5 75.5 2 85.5 82.5 86.5 84.0 88.5 86.5 84.0 81.5 3 86.5 84.0 89.5 87.5 89.5 87.5 85.5 82.5 5 88.5 86.5 89.5 87.5 89.5 87.5 86.5 84.0 7.5 89.5 87.5 91.7 90.2 91.0 89.5 86.5 84.0 10 90.2 88.5 91.7 90.2 91.0 89.5 89.5 87.5 15 91.0 89.5 92.4 91.0 91.7 90.2 89.5 87.5 20
45、 91.0 89.5 93.0 91.7 91.7 90.2 90.2 88.5 25 91.7 90.2 93.6 92.4 93.0 91.7 90.2 88.5 30 91.7 90.2 93.6 92.4 93.0 91.7 91.7 90.2 40 92.4 91.0 94.1 93.0 94.1 93.0 91.7 90.2 50 93.0 91.7 94.5 93.6 94.1 93.0 92.4 91.0 60 93.6 92.4 95.0 94.1 94.5 93.6 92.4 91.0 75 93.6 92.4 95.4 94.5 94.5 93.6 93.6 92.4 1
46、00 94.1 93.0 95.4 94.5 95.0 94.1 93.6 92.4 125 95.0 94.1 95.4 94.5 95.0 94.1 94.1 93.0 150 95.0 94.1 95.8 95.0 95.8 95.0 94.1 93.0 200 95.4 94.5 96.2 95.4 95.8 95.0 94.5 93.6 250 95.8 95.0 96.2 95.4 95.8 95.0 95.0 94.1 300 95.8 95.0 96.2 95.4 95.8 95.0 350 95.8 95.0 96.2 95.4 95.8 95.0 400 95.8 95.0
47、 96.2 95.4 450 95.8 95.0 96.2 95.4 500 95.8 95.0 96.2 95.4 NEMA Premium 2014 Page 5 2014 National Electrical Manufacturers Association Annex B NEMA MG1-2014 Table 12-13 FULL-LOAD EFFICIENCIES FOR 60 HZ PREMIUM EFFICIENCY MEDIUM ELECTRIC MOTORS RATED 5000 VOLTS OR LESS (FORM WOUND) Open Motors 2 Pole
48、 4 Pole 6 Pole 8 Pole HP Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency 250 94.5 93.6 95.0 94.1 95.0 94.1 93.6 92.4 300 94.5 93.6 95.0 94.1 95.0 94.1 350 94.5 93.6 95.0 94.1 95.0 94.1 400 94.5 93
49、.6 95.0 94.1 450 94.5 93.6 95.0 94.1 500 94.5 93.6 95.0 94.1 Enclosed Motors 2 Pole 4 Pole 6 Pole 8 Pole HP Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency Nominal Efficiency Minimum Efficiency 250 95.0 94.1 95.0 94.1 95.0 94.1 94.1 93.0 300 95.0 94.1 95.0 94.1 95.0 94.1 350 95.0 94.1 95.0 94.1 95.0 94.1 400 95.0 94.1 95.0 94.1 450 95.0 94.1 95.0 94.1 500 95.0 94.1 95.0 94.1 NEMA Premium
