1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI C37.51-2003 (R2010)For Switchgear Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear Assemblies Conformance Test ProceduresANSI C37.51-2003 (R2010) American National Standard for Switchgear Metal-Enclosed Low-Vol
2、tage AC Power Circuit Breaker Switchgear Assemblies Conformance Test Procedures Secretariat: National Electrical Manufacturers Association Approved October 31, 2003 Reaffirmed November 17, 2010 Contains February 2011 Errata American National Standards Institute, Inc. ANSI C37.51-2003 (R2010) NOTICE
3、AND DISCLAIMER The information in this publication was considered technically sound by the consensus 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
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11、ith 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 safetyrelated information in this document shall not be attributable to NEMA and is sole
12、ly the responsibility of the certifier or maker of the statement.ANSI C37.51-2003 (R2010) AMERICAN NATIONAL STANDARD Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standard
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15、 purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority
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17、may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writ
18、ing the American National Standards Institute. Published by National Electrical Manufacturers Association 1300 North 17th Street, Rosslyn, VA 22209 Copyright 2011 by National Electrical Manufacturers Association All rights reserved including translation into other languages, reserved under the Unive
19、rsal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permis
20、sion of the publisher. Printed in the United States of Americai ANSI C37.51-2003 (R2010) This page intentionally left blank. ii ANSI C37.51-2003 (R2010) CONTENTS Foreword . v Section 1 SCOPE.1 1.1 Control and instrumentation componentsprotection requirements.1 1.2 Installations not covered.1 1.3 Pur
21、pose 1 Section 2 REFERENCED STANDARDS 2 Section 3 DEFINITIONS 3 3.1 Conformance tests .3 3.2 Design tests (type tests).3 3.3 Production tests (routine tests).3 Section 4 GENERAL TEST CONDITIONS .4 4.1 Ambient conditions .4 4.2 Protection requirements .4 4.2.1 General4 4.2.2 Control power transformer
22、s.4 4.2.3 Voltage transformers.5 Section 5 CONFORMANCE TEST REQUIREMENTS6 5.1 General.6 5.2 Test requirements.6 5.3 Test arrangements .6 5.3.1 Arrangement to be used6 5.3.2 Specifics of test arrangement7 5.3.3 Representation 7 5.4 Dielectric tests 7 5.5 Continuous current test 8 5.5.1 Duration of Te
23、sts .8 5.5.2 Measurement of Ambient Air Temperature.9 5.5.3 Method of Measuring Temperature.9 5.5.4 Copper Conductors for Use in Continuous Current Tests 9 5.5.5 Performance11 5.6 Short-time withstand current tests11 5.6.1 General11 5.6.2 Primary phase bus and connections.11 5.6.3 Neutral bus and co
24、nnections (if design includes a neutral bus) .13 5.6.4 Ground bus and connections 14 5.7 Short-circuit withstand current tests .14 5.7.1 General14 5.7.2 Primary phase bus and connections.15 5.7.3 Neutral bus (if applicable), ground bus, and connections.16 5.8 Mechanical performance testsremovable ci
25、rcuit breakers .16 5.8.1 Test Procedure16 5.8.2 Cycles of Operation.16 5.8.3 Performance17 iii ANSI C37.51-2003 (R2010) Section 6 TREATMENT OF NONCONFORMING RESULTS.18 Section 7 PRODUCTION TESTS 19 7.1 General.19 7.2 Dielectric withstand voltage tests .19 7.3 Mechanical operation tests.19 7.4 Ground
26、ing of instrument transformer cases test19 7.5 Electrical operation and wiring tests.19 7.5.1 Control wiring continuity 19 7.5.2 Control wiring insulation test .19 7.5.3 Polarity verification 20 7.5.4 Sequence tests20 Section 8 RETESTING.21 iv ANSI C37.51-2003 (R2010) Foreword (This Foreword is not
27、part of American National Standard C37.51-2003.) This standard has been developed to describe selected tests and procedures to demonstrate conformance in accordance with Section 6, Tests, of ANSI/IEEE C37.20.1-2002 Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear. It is published separ
28、ately from ANSI/IEEE C37.20.1-2002 to facilitate its use and to permit timely revisions based on experience. Revisions have been made to this edition to coordinate with revisions made to ANSI/IEEE C37.20.1. This standard is one of several in a series of test procedures for conformance testing of swi
29、tchgear products. While this standard is written for general guidance, performance criteria are established so that this standard can be adopted as the basis for certification of metal-enclosed low-voltage alternating current power circuit breaker switchgear for use in non-utility installations subj
30、ect to regulation by public authorities and similar agencies concerned with laws, ordinances, regulations, administrative orders, and similar instruments. This standard has been prepared by a Working Group sponsored by the Power Switchgear Assemblies Technical Committee of the Switchgear Section of
31、the National Electrical Manufacturers Association (NEMA 8-SG-V). During the course of its preparation, coordination has been maintained with the Switchgear Committee of the Power Engineering Society of the Institute of Electrical and Electronics Engineers. Proposed or recommended revisions should be
32、 submitted to: Vice President, Technical Services National Electrical Manufacturers Association 1300 North 17th Street Rosslyn, VA 22209 This standard was processed and approved for submittal to ANSI by Accredited Standards Committee on Power Switchgear C37. Committee approval of the standard does n
33、ot necessarily imply that all committee members voted for its approval. At the time of its approval, the C37 Committee had the following members: T. Olsen, Chair J. Collins, Secretary Organization Represented: Name of Representative: Electric Light and Power Group D. E. Galicia J. L. Koepfinger G. J
34、. Martuscello Y. Musa E. WorlandInstitute of Electrical and Electronics Engineers A. Dixon J. JerabekT. E. Royster M. D. Sigmon J. G. Wood D. Lemmerman (Alt) R. W. Long (Alt) National Electrical Manufacturers Association G. Jones v ANSI C37.51-2003 (R2010) R. W. Long T. W. Olsen G. J. Sakats D. Ston
35、eSwindlerE. Byron (Alt) International Electrical Testing Association A. Peterson National Electrical Contractors Association D. Harwood Testing Laboratory Group A. Harkness P. Notarian Tennessee Valley Authority J. Nelson U.S. Dept. of Agriculture T. Roscoe U.S. Dept. of the Army, Office of the Chie
36、f of Engineers J. A. Gilson U.S. Dept. of the Navy, Naval Construction Battalion Center D. L. Mills Technical Liaison W. Laubach C. Wagner The following members of the NEMA Power Switchgear Assemblies Technical Committee worked on this standard prior to its publication: T. W. Olsen, Chair J. Collins
37、, Secretary C. Ball P. Dwyer H. Hirz W. Long T. Olsen G. Sakats S. Slattery J. Wiseman Errata issued February 2011 Replace “disconnected” with “connected” in 5.8.2, Step 4: 5.8.2 Cycles of Operation Step 4. Move the circuit breaker to a position approximately midway between the test and disconnected
38、 positions or as close as possible to a midpoint position as the removable secondary test coupler (if required) will permit. If required, install a secondary test coupler. Check to ensure that the circuit breaker cannot be closed, either electrically or mechanically. vi AMERICAN NATIONAL STANDARD AN
39、SI C37.51-2003 (R2010)For SwitchgearFor Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear AssembliesConformance Test Procedures 1 Scope This Standard is a conformance testing standard optionally applicable to all metal-enclosed low-voltage ac power circuit breaker switchgear assemblies
40、designed, tested, and manufactured in accordance with ANSI/IEEE C37.20.1-2002, Metal-Enclosed Low-Voltage AC Power Circuit Breaker Switchgear. This standard covers selected tests to demonstrate conformance of the basic switchgear section (which includes the structure, circuit breaker compartments, i
41、nstrument compartments, buses, and internal connections) with Section 6, Tests, of ANSI/IEEE C37.20.1-2002. See ANSI/IEEE C37.20.1-2002 for assigned ratings and usual service conditions. 1.1 CONTROL AND INSTRUMENTATION COMPONENTSPROTECTION REQUIREMENTS LV switchgear assemblies usually include contro
42、l and instrumentation components unique for the application that are not individually evaluated under this standard. However, these components, when utilized in circuits that obtain their energy from primary sources within the LV switchgear, must be suitably protected in accordance with 4.2. NOTEIn
43、this standard, the use of the term “LV switchgear“ shall be considered to mean “metal-enclosed low-voltage alternating current power circuit breaker switchgear assemblies.“ The use of the term “circuit breaker“ shall be considered to mean “low voltage alternating current power circuit breaker,“ unle
44、ss qualified by other descriptive terms. 1.2 INSTALLATIONS NOT COVERED This standard does not cover equipment intended for use in installations under the exclusive control of electric utilities for the purposes of communication or metering, or for generation, control, transformation, transmission, a
45、nd distribution of electric energy located in buildings used exclusively by utilities for such purposes, or located outdoors on property owned or leased by the utility or on public highways, street, roads, and the like, or located outdoors by established rights on private property. NOTEAn electric u
46、tility is an entity that is overseen by a public utility commission, a public service commission, or other regulatory agency having jurisdiction for such installations. 1.3 PURPOSE This standard specifies the tests that shall be performed to demonstrate that the LV switchgear being tested conforms w
47、ith the ratings assigned to it and meets the mechanical and electrical performance requirements specified in ANSI/IEEE C37.20.1-2002. 1 ANSI C37.51-2003 (R2010) Section 2 REFERENCED STANDARDS When there is a conflict between this standard and these referenced standards, this standard shall apply. Th
48、is standard is intended to be used in conjunction with the following American National Standards. When these referenced standards are superseded by a revision approved by the American National Standards Institute, Inc., the revisions shall apply. ANSI C37.16-2000, Switchgear - Low-Voltage Power Circ
49、uit Breakers and AC Power Circuit Protectors - Preferred Ratings, Related Requirements, and Application Recommendations ANSI C37.50-1989 (R2000), Switchgear - Low-Voltage AC Power Circuit Breakers Used in Enclosures Test Procedures ANSI/IEEE C37.09-1999, Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis ANSI/IEEE C37.13-1990 (R1995), Low-Voltage AC Power Circuit Breakers Used in Enclosures ANSI/IEEE C37.20.1-2002, Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear ANSI/IEEE C37.26-2003, Standard Guide for Methods of Po
