NEMA MG 1-2006 Information Guide for General Purpose Industrial AC Small and Medium Squirrel-Cage Induction Motor Standards.pdf
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1、NEMA Standards Publication MG 1-2006 Motors and Generators Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1752 Rosslyn, VA 22209 www.nema.org Copyright 2006 by the National Electrical Manufacturers Association. All rights including translation into other la
2、nguages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensu
3、s of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. The National Electrical Manufacturers Association (NEMA) stan
4、dards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. Whi
5、le NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standar
6、ds and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. N
7、EMA 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 warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to gua
8、rantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertak
9、ing 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 given circumstances. Information a
10、nd 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 compliance with the contents of this
11、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 safetyrelated information in this document shall not be attributable to NEMA and is solely the responsibility of
12、the certifier or maker of the statement. MG 1-2006 Page i Copyright 2006 by the National Electrical Manufacturers Association. CONTENTS Page No. Forewordxxxv Section I GENERAL STANDARDS APPLYING TO ALL MACHINES Part 1REFERENCED STANDARDS AND DEFINITIONS1-1 1.1 REFERENCED STANDARDS1-1 DEFINITIONS 1-4
13、 CLASSIFICATION ACCORDING TO SIZE 1-4 1.2 MACHINE .1-4 1.3 SMALL (FRACTIONAL) MACHINE1-4 1.4 MEDIUM (INTEGRAL) MACHINE1-4 1.4.1 Alternating-Current Medium Machine.1-4 1.4.2 Direct-Current Medium Machine.1-4 1.5 LARGE MACHINE1-4 1.5.1 Alternating-Current Large Machine.1-4 1.5.2 Direct-Current Large M
14、achine 1-5 CLASSIFICATION ACCORDING TO APPLICATION1-5 1.6 GENERAL PURPOSE MOTOR1-5 1.6.1 General-Purpose Alternating-Current Motor.1-5 1.6.2 General-Purpose Direct-Current Small Motor 1-5 1.7 GENERAL-PURPOSE GENERATOR1-5 1.8 INDUSTRIAL SMALL MOTOR .1-5 1.9 INDUSTRIAL DIRECT-CURRENT MEDIUM MOTOR.1-5
15、1.10 INDUSTRIAL DIRECT-CURRENT GENERATOR .1-5 1.11 DEFINITE-PURPOSE MOTOR 1-6 1.12 GENERAL INDUSTRIAL MOTORS .1-6 1.13 METAL ROLLING MILL MOTORS.1-6 1.14 REVERSING HOT MILL MOTORS1-6 1.15 SPECIAL-PURPOSE MOTOR .1-6 1.16 NEMA PREMIUM EFFICIENCY MOTOR.1-6 CLASSIFICATION ACCORDING TO ELECTRICAL TYPE.1-
16、6 1.17 GENERAL.1-6 1.17.1 Electric Motor.1-6 1.17.2 Electric Generator1-6 1.17.3 Electric Machines.1-6 1.18 ALTERNATING-CURRENT MOTORS.1-7 1.18.1 Induction Motor1-7 1.18.2 Synchronous Motor1-7 1.18.3 Series-Wound Motor.1-8 1.19 POLYPHASE MOTORS.1-8 1.19.1 Design Letters of Polyphase Squirrel-Cage Me
17、dium Motors 1-8 1.20 SINGLE-PHASE MOTORS 1-8 1.20.1 Design Letters of Single-Phase Small Motors.1-8 1.20.2 Design Letters of Single-Phase Medium Motors.1-9 1.20.3 Single-Phase Squirrel-Cage Motors1-9 1.20.4 Single-Phase Wound-Rotor Motors.1-10 1.21 UNIVERSAL MOTORS.1-10 1.21.1 Series-Wound Motor1-10
18、 1.21.2 Compensated Series-Wound Motor 1-10 1.22 ALTERNATING-CURRENT GENERATORS1-10 1.22.1 Induction Generator.1-10 1.22.2 Synchronous Generator.1-11 MG 1-2006 Page ii Copyright 2006 by the National Electrical Manufacturers Association. 1.23 DIRECT-CURRENT MOTORS.1-11 1.23.1 Shunt-Wound Motor.1-11 1
19、.23.2 Series-Wound Motor1-11 1.23.3 Compound-Wound Motor 1-11 1.23.4 Permanent Magnet Motor1-11 1.24 DIRECT-CURRENT GENERATORS .1-11 1.24.1 Shunt-Wound Generator1-11 1.24.2 Compound-Wound Generator .1-11 CLASSIFICATION ACCORDING TO ENVIRONMENTAL PROTECTION AND METHODS OF COOLING 1-12 1.25 OPEN MACHI
20、NE (IP00, IC01)1-12 1.25.1 Dripproof Machine (IP12, IC01).1-12 1.25.2 Splash-Proof Machine (IP13, IC01).1-12 1.25.3 Semi-Guarded Machine (IC01)1-12 1.25.4 Guarded Machine (IC01).1-12 1.25.5 Dripproof Guarded Machine (IC01) .1-15 1.25.6 Open Independently Ventilated Machine (IC06)1-15 1.25.7 Open Pip
21、e-Ventilated Machine1-15 1.25.8 Weather-Protected Machine1-15 1.26 TOTALLY ENCLOSED MACHINE .1-15 1.26.1 Totally Enclosed Nonventilated Machine (IC410)1-15 1.26.2 Totally Enclosed Fan-Cooled Machine1-15 1.26.3 Totally Enclosed Fan-Cooled Guarded Machine (IC411)1-16 1.26.4 Totally Enclosed Pipe-Venti
22、lated Machine (IP44) .1-16 1.26.5 Totally Enclosed Water-Cooled Machine (IP54)1-16 1.26.6 Water-Proof Machine (IP55)1-16 1.26.7 Totally Enclosed Air-to-Water-Cooled Machine (IP54)1-16 1.26.8 Totally Enclosed Air-to-Air-Cooled Machine (IP54).1-16 1.26.9 Totally Enclosed Air-Over Machine (IP54, IC417)
23、.1-16 1.26.10 Explosion-Proof Machine.1-17 1.26.11 Dust-Ignition-Proof Machine1-17 1.27 MACHINE WITH ENCAPSULATED OR SEALED WINDINGS1-17 1.27.1 Machine with Moisture Resistant Windings.1-17 1.27.2 Machine with Sealed Windings1-17 CLASSIFICATION ACCORDING TO VARIABILITY OF SPEED 1-17 1.30 CONSTANT-SP
24、EED MOTOR 1-17 1.31 VARYING-SPEED MOTOR1-17 1.32 ADJUSTABLE-SPEED MOTOR.1-18 1.33 BASE SPEED OF AN ADJUSTABLE-SPEED MOTOR.1-18 1.34 ADJUSTABLE VARYING-SPEED MOTOR1-18 1.35 MULTISPEED MOTOR.1-18 RATING, PERFORMANCE, AND TEST.1-18 1.40 RATING OF A MACHINE.1-18 1.40.1 Continuous Rating .1-18 1.40.2 Sho
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