1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA MG 1-2014Motors and GeneratorsNEMA MG 1-2014 Motors and Generators NEMA MG 1-2014 Motors and Generators Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 ww
2、w.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 copyright conventio
3、ns. 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 necessarily mean there was unanimous agreement among every person participating in the development pr
4、ocess. 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 process brings together volunteers and/or seeks out the views of persons who have an intere
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9、son 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 the advice of a competent professional in determining the exercise of reasonable care in any
10、 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 covered by this publication. NEMA has no power, nor does it undertake to police or enforce com
11、pliance 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 any health- or safety-related information in this document shall not be attributable to NEMA
12、and is solely the responsibility of the certifier or maker of the statement. MG 1-2014 Summary of Changes, Page 1 2014 National Electrical Manufacturers Association Changes made for MG 1-2014 will be unmarked in this version. Changes made for the MG 1-2014 revision are identified here. Section I, Pa
13、rt 1 1.1 Revised text, updated, and occasionally added references 1.19.1.2 Updated references to subsections 1.19.1.3 Updated references to subsections 1.27.2 Added footnote 1.41.2 Reference to added clause 1.41.3 Reference to added clause 1.54 Revised and redefined Section I, Part 4 4.4.8 Added sub
14、title Section II, Part 10 10.39.1 Addition of letter m to Nameplate Marking Requirement Section II, Part 12 12.31 Revised and added characteristics 12.58.1 Added references, revised determination of Motor Efficiency and Losses, deleted outdated information, added footnotes 12.58.2 Added and revised
15、to include Design N, Design L and Design M single-speed single-phase squirrel-cage small motors, added efficiency levels to Table 12-10 12.59 Revised title to Efficiency Levels of Energy Efficient Polyphase Squirrel-Cage Random Wound Induction Motors Rated 600 Volts or Less at 60 Hz and added new pa
16、ragraph 12.60 Revised title to Efficiency Levels of Premium Efficientcy Random Wound Electric Motors Rated 600 Volts or Less at 60 Hz 12.60.1 Revised title to Random Wound Electric Motor, added paragraph 12.60.1.1 Added new subsection title Single-Phase Capacitor-Start Induction-Run or Capacitor-Sta
17、rt Capacitor-Run Small Motors and paragraph 12.60.1.2 Added new subsection title Single-Phase Capacitor-Start Capacitor-Run Small Motors and paragraph 12.60.1.3 Added new subsection title Polyphase Small Motors and paragraph 12.60.1.4 Added new subsection title Polyphase Medium Motors and paragraph
18、12.60.2 Revised 60 Hz Motors Rated Medium Voltage, 5000 Volts or Less (Form Wound) and paragraph 12.60.3 Revised 50 Hz Motors Rated 600 Volts or Less (Random Wound), paragraph, revised formulas, added 8 Pole category to table, revised values 12.61 Revised Table 12-11 title, revised Table 12-12, revi
19、sed Table 12-13, deleted data in Table 12-14, added Table 12-15, added Table 12-16, added Table 12-17, added Table 12-18, added Table 12-19, added Table 12-20, added Table 12-21 Section III, Part 20 20.21 Addition of KW Values 20.21.1 Addition of subtitle, addition of KW Values 20.21.A Revision of r
20、eferenced paragraphs 20.21.B Revised paragraph, added Table 20-A 20.21.C Revised paragraph, added Table 20-B 20.21.C.2 Revised paragraphs, added Table 20-C 20.21.C.3 Revised paragraphs, added Table 20-D 20.21.C.4 Added paragraph, added Table 20-E, Table 20-F, Table 20-G 20.25.1 Revised Nameplate Mar
21、king requirement by the addition of l (NEMA nominal efficiency) MG 1-2014 Summary of Changes, Page 2 2014 National Electrical Manufacturers Association Section IV, Part 31 31.3.5 Simplified text 31.4.4.3 Revised paragraph for clarification purposes MG 1-2014 Summary of Changes, Page 3 2014 National
22、Electrical Manufacturers Association Changes made for MG 1-2009, Revision 1-2010 are marked by an orange line to the left of the changed material Note: Where text has been revised in more than one version, only the most recent is color-coded Example of change made for MG 1-2009, Revision 1-2010 Sect
23、ion I, Part 7 7.4.2 Replaced “inches” with “mils” 7.6.1 Revised text Figure 7-1 Renamed figure 7.8.1 Revised text Figure 7-6 Replaced figure Table 7-1 Revised table 7.8.2 Deleted section 7.8.3 Deleted section 7.8.4 Deleted section 7.8.5 Revised reference to table 7.8.6 Revised reference to table 7.9
24、.1 Revised reference to table 7.9.2 Revised text and reference to table 7.9.3 Deleted section Table 7-2 Deleted table Table 7-3 Deleted table Table 7-4 Added table to replace Tables 7-2 and 7-3 Section II, Part 14 14.48 Added section MG 1-2014 Summary of Changes, Page 4 2014 National Electrical Manu
25、facturers Association Changes made for MG 1-2009 are marked by a red line to the left of the changed material Note: Where text has been revised in more than one version, only the most recent is color-coded Example of change made for MG 1-2009 Section I, Part 1 1.1 Added: Reference to IEC 60034-30-20
26、08 1.16 Deleted section 1.41.3 Added: Premium Efficiency Motor Section I, Part 2 2.2 Added: “To prevent confusion with the numerals 1 and 0, the letters “I” and “O” shall not be used.” Updated footnote references Added and revised markings Added: Reference to 2.67 for auxiliary devices 2.60.1.2 Revi
27、sed Figure 2-48B for clarity 2.67 Added: Auxiliary Devices (entire section) Section I, Part 4 Table 4-2 Dimension revised in column 6 Section II, Part 10 Table 10-5 Adjusted table Section II, Part 12 12.41 In table, corrected synchronous speed of the 50 Hz machine 12.60.3 Added: Additional paragraph
28、s, equation, and table Table 12-14 Replaced Table 12-14 12.62 Revised 12.62a For 12.62b and 12.62d, revised minimum insulation resistance Added: Note 12.63 Note 2: Updated reference to 20.8 Section II, Part 13 13.2 Revised frame size Section II, Part 18: 18.131 Figure 18-16: Dimension revised to 5.8
29、75 Section III, Part 20: 20.18.1 Revised 20.18.1a For 20.18.1b and 20.18.1d, revised minimum insulation resistance 20.18.2 Revised 20.18.2a For 20.18.2b and 20.18.2d, revised minimum insulation resistance Added: Note Section IV, Part 30: Table 30-1 Revised footnote G.1 reference to 12.53 MG 1-2014 S
30、ummary of Changes, Page 5 2014 National Electrical Manufacturers Association Changes made for MG 1-2006 Revision 1, published Nov. 20, 2007 (includes MG 1-2006 Errata) are marked by a blue line to the left of the changed material Note: Where text has been revised in more than one version, only the m
31、ost recent is color-coded Example of change made for MG 1-2006 Revision 1 Contents Entire Table of Contents was revised due to added sections and repagination Section I, Part 1 1.16 NEMA PREMIUM EFFICIENCY ELECTRIC MOTOR Changed TM to Deleted general paragraph, added: 1.16.1 60 Hz 1.16.2 50 Hz Secti
32、on I, Part 2 2.2 TERMINAL MARKINGS Footnotes 2.20.2 Induction Machines 2.24 DIRECTION OF ROTATION 2.60.1.1 Terminal Markings Using “T” 2.60.1.2 Terminal Markings in Accordance with IEC 60034-8 Using U, V, W FIGURE 2-48B Added figure 2.61.6 Sixth Revised text Section I, Part 3 3.1.8 Accessories and C
33、omponents Inserted sentence Section I, Part 4 4.9.4 Parallelism of Keyseats to Shaft Centerline 4.9.5 Lateral Displacement of Keyseats Figure 4-7 Corrected specifications 4.9.8 Shaft Extension Key(s) Table 4-7 Corrected specifications Section II, Part 10 Ratings AC Motors 10.38 NAMEPLATE TEMPERATURE
34、 RATINGS FOR ALTERNATING-CURRENT SMALL AND UNIVERSAL MOTORS Corrected reference 12.42.3 10.40.1 Medium Single-Phase and Polyphase Squirrel-Cage Motors Corrected references in text and footnote 2 10.42.2 Polyphase Wound-Rotor Motors Corrected references in text Section II, Part 10 Ratings DC Motors 1
35、0.66.2 Small Motors Except Those Rated 1/20 Horsepower and Less Corrected footnote references MG 1-2014 Summary of Changes, Page 6 2014 National Electrical Manufacturers Association Section II, Part 12 Ratings Tests and Performance AC Motors 12.42.4 Temperature Rise for Air-Cooled Machines for Ambie
36、nts Lower than 40 C, but Not Below 0 C (Added section) 12.43.2 Temperature Rise for Air-Cooled Machines for Ambients Lower than 40 C, but Not Below 0 C (Added section) 12.60 EFFICIENCY LEVEL OF PREMIUM EFFICIENCY ELECTRIC MOTORS (Added throughout) Tables 12-12 through 12-14 (Added ) 12-13 FULL-LOAD
37、EFFICIENCIES FOR 60 HZ NEMA PREMIUM EFFICIENCY ELECTRIC MOTORS (Added ), edited table title 12.62 MACHINE WITH ENCAPSULATED OR SEALED WINDINGSCONFORMANCE TESTS (Clarified text in b and d) Section II, Part 12 Ratings Tests and Performance DC Motors 12.67.5 Temperature Rise for Air-Cooled Machines for
38、 Ambients Lower than 40 C, but Not Below 0 C Added section Section II, Part 15 15.41.2 Temperature Rise for Ambients Higher than 40C Added section Section III, Part 20 20.8.1 Machines with a 1.0 Service Factor at Rated Load Corrected reference in footnote 20.8.2 Machines with a 1.15 Service Factor a
39、t Service Factor Load Corrected reference in footnote 20.18.1 Test for Stator Which Can Be Submerged Clarified text in b and d 20.18.2 Test for Stator Which Can Be Submerged Clarified text in b and d Section III, Part 20 21.10.5 Temperature Rise for Air-Cooled Motors for Ambients Lower than 40 C, bu
40、t Not Below 0 C Deleted lower ambients in a and b 21.28.3 Unusual Service Conditions Corrected references in subclause b. 21.37 COMPRESSOR FACTORS Corrected reference 21.38 SURGE CAPABILITIES OF AC WINDINGS WITH FORM-WOUND COILS Corrected reference Section III, Part 23 23.9.3 Temperature Rise for Ai
41、r-Cooled Machines for Ambients Lower than 40 C, but Not Below 0 C Added section Section III, Part 24 24.40.3 Temperature Rise for Air-Cooled Machines for Ambients Lower than 40 C, but Not Below 0 C Added section MG 1-2014 Summary of Changes, Page 7 2014 National Electrical Manufacturers Association
42、Section IV, Part 31 31.4.1.6 Temperature Rise for Air-Cooled Machines for Ambients Lower than 40 C, but Not Below 0 C Added section Section IV, Part 32 Table 32-3 corrected reference 32.6.2 Temperature Rise for Air-Cooled Machines for Ambients Lower than 40 C, but Not Below 0 C Added section 32.26 G
43、ENERATOR TERMINAL HOUSING Added “housing” Section IV, Part 33 33.3.2.5 Temperature Rise for Air-Cooled Machines for Ambients Lower than 40 C, but Not Below 0 C Added section MG 1-2014 Summary of Changes, Page 8 2014 National Electrical Manufacturers Association Changes made for MG 1-2003 Revision 2,
44、 published as MG 1-2006, are marked by a purple line to the left of the changed material Note: Where text has been revised in more than one version, only the most recent is color-coded Example of change made for MG 1-2003 Revision 2, published as MG 1-2006 Section I, Part 1 1.1 Referenced Standards
45、updated to reflect current editions 1.70 NAMEPLATE MARKING Entire section added Section I, Part 3 3.1.8 Accessories and Components Correction 3.1.11 Tests of an Assembled Group of Machines and Apparatus Correction Section I, Part 4 4.4.1 Dimensions for Alternating-Current Foot-Mounted Machines with
46、Single Straight-Shaft Extension Notes correction 4.4.2 Notes correction 4.4.3 Notes correction 4.5.1 Notes correction 4.5.2 Notes correction 4.5.3 Notes 4.9.3 Bottom of Keyseat to Shaft Surface Figure 4-7 Corrected dimension 4.9.8 Shaft Extension Key(s) correction Section I, Part 9 9.1 SCOPE changed
47、 “electrical motors” to “machines” 9.4 METHODS OF MEASUREMENT updated references to ANSI standards 9.4.2 “The” (added; “Either” deleted) method specified in ANSI S12.56 may be used. 9.6.2 Corrected reference to 9.6.2b Table 9-4 Updated ANSI standard references; added third column Section II, Part 10
48、 10.39 corrected section reference 10.39.6 deleted 10.40.1 Medium Single-Phase and Polyphase Squirrel-Cage Motors corrected section reference 10.66 NAMEPLATE MARKING correction 10.66.3 Medium Motors correction Section II, Part 12 12.3 HIGH-POTENTIAL TEST VOLTAGES FOR UNIVERSAL, INDUCTION, AND DIRECT
49、-CURRENT MOTORS MG 1-2014 Summary of Changes, Page 9 2014 National Electrical Manufacturers Association Corrections to Effective Test Voltage Corrections to Note 3 80 percent 12.35 LOCKED-ROTOR CURRENT OF 3-PHASE SMALL AND MEDIUM SQUIRREL-CAGE INDUCTION MOTORS deleted reference “60-hertz” and “rated at 230 volts” 12.40.1 Design A and B Motors The pull-up torque of Design A and B Added: 60- and 50-hertz 12.40.2 Design C Motors The pull-up torque of Design C Added: 60- and 50-hertz, single spe
