1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 60947-7-3Low-Voltage Switchgear andControlgear Part 7-3:Ancillary Equipment SafetyRequirements for FuseTerminal BlocksUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBU
2、TION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULLow-Voltage Switchgear and Controlgear Part 7-3: Ancillary Equipment Safety Requirements for FuseTerminal BlocksUL 60947-7-3Second Edition, Dated May 6, 2011Summary
3、 of TopicsThis revision of ANSI/UL 60947-7-3 is to add the ANSI approval date to the title page. Thisstandard is a bi-national IEC-based standard that is harmonized for Mexico and the UnitedStates, and co-published by both standards development organizations (ANCE and UL).All rights reserved. No par
4、t of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, includi
5、ng butnot limited to, the implied warranties of merchantability or fitness for any purpose.In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or th
6、einability to use this Standard, even if UL or an authorized UL representative has been advised of thepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs St
7、andards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers comput
8、er system.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the preface. The priortext for requirements that have been revised and that have a future effectiv
9、e date are located after theStandard, and are preceded by a SUPERSEDED REQUIREMENTS notice.OCTOBER 14, 2011 UL 60947-7-3 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULOCTOBER 14, 2011 UL 60947-7-3tr2No Text on This PageUL COPYRIGHTED MATE
10、RIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAssociation of Standardization and CertificationNMX-J-538/7-3-ANCEFirst EditionUnderwriters Laboratories Inc.UL 60947-7-3Second EditionLow-Voltage Switchgear and Controlgear Part 7-3: AncillaryEquipment Safety Requ
11、irements for Fuse Terminal BlocksMay 6, 2011(Title Page Reprinted: October 14, 2011)ANSI/UL 60947-7-3-2011UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCommitment for AmendmentsThis standard is issued jointly by the Association of Standardiz
12、ation and Certification (ANCE) andUnderwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standardmay be submitted to ANCE or UL at anytime. Revisions to this standard will be made only afterprocessing according to the standards development procedures of ANCE and
13、UL. UL will issuerevisions to this standard by means of a new edition or revised or additional pages bearing their dateof issue. ANCE will incorporate the same revisions into a new edition of the standard bearing the samedate of issue as the UL pages.Copyright 2011 ANCERights reserved in favor of AN
14、CE.Copyright 2011 Underwriters Laboratories Inc.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standardshould be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regardingthose Standards shall remain the sole and exclusiv
15、e property of UL.This ANSI/UL Standard for Safety consists of the Second Edition including revisions through May 6,2011. The most recent designation of ANSI/UL 60947-7-3 as an American National Standard (ANSI)occurred on May 6, 2011. ANSI approval for a standard does not include the Cover Page, Tran
16、smittalPages, Title Page (front and back), or the Preface. The National Difference Page and IEC Forewordare also excluded from the ANSI approval of IEC-based standards.Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via
17、 a Proposal Request in ULs On-Line Collaborative StandardsDevelopment System (CSDS) at http:/.To purchase UL Standards, visit Comm 2000 at http:/m- call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSPreface .
18、5NATIONAL DIFFERENCES .7FOREWORD 8INTRODUCTION .101 General .111.1 Scope 111.2 Normative references 122 Definitions 123 Classification 134 Characteristics .144.1 Fuse-links 144.2 Rated power dissipation value 144.3 Rated and limiting values .144.3.7DV.1 Type of terminal block .155 Product informatio
19、n 155.1 Marking 155.2 Additional information 165.3 Marking on the packing unit 176 Normal service, mounting and transport conditions .176.1.1 Ambient temperature .177 Constructional and performance requirements .177.1 Constructional requirements 177.2 Performance requirements 207.3 Electromagnetic c
20、ompatibility (EMC) .238 Tests .238.1 Kinds of test 238.2 General 238.3 Verification of mechanical characteristics .238.4 Verification of electrical characteristics .278.5 Verification of thermal characteristics 348.6 Verification of EMC characteristics .42Annex A (normative) (USA informative)GaugesA
21、nnex B (informative) Power dissipation values PVand PVKB.1 Ascertainment of the rated power dissipation values Pvand PVKof fuse terminal blocks 45B.2 Design of the derating curves .45B.3 Evaluation .46B.4 Examples .46B.4.1 Example 1 Field of application: exclusive short-circuit protection (PVK) .46M
22、AY 6, 2011 NMX-J-538/7-3-ANCE UL 60947-7-3 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULB.4.2 Example 2 Field of application: Overload and short-circuit protection (PV) 50Annex C (normative) Order of tests and number of specimensAnnex DVA
23、(Normative) IEC, Mexican, USA, Standard ReferencesAnnex DVB (informative)DVB.1 General .59BibliographyMAY 6, 2011NMX-J-538/7-3-ANCE UL 60947-7-34UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis is the common ANCE and UL standard for
24、 Low-Voltage Switchgear and Controlgear Part 7-3:Low-Voltage Switchgear and Controlgear Part 7-3: Ancillary Equipment Safety Requirements for FuseTerminal Blocks. It is the first edition of NMX-J-538/7-3-ANCE, and the second edition of UL 60947-7-3.This edition of UL 60947-7-3 supersedes the previou
25、s edition published in 2004.This standard is based on IEC Publication 60947-7-3 First Edition (2002), Low-Voltage Switchgear andControlgear Part 7-3: Ancillary Equipment Safety Requirements for Fuse Terminal Blocks, as revisedby corrigendum (March 2003). IEC publication 60947-7-3 is copyrighted by t
26、he IEC.This harmonized standard was prepared by the Association of Standardization and Certification (ANCE)and Underwriters Laboratories Inc. (UL). The efforts and support of the Technical HarmonizationCommittee for Industrial Control Equipment, of the Council on the Harmonization of Electrotechnica
27、lStandards of the Nations of the Americas (CANENA), are gratefully acknowledged.This Standard is considered suitable for use for conformity assessment within the stated scope of theStandard.The Mexican Standard was developed by the CT PIE-A from the Comite de Normalizacion de laAsociacion de Normali
28、zacion y Certificacion, A.C., CONANCE, with the collaboration of the manufacturersand users.This standard has been approved by the American National Standards Institute (ANSI) as an AmericanNational Standard.Where reference is made to a specific number of samples to be tested, the specified number i
29、sconsidered a minimum quantity.Note: Although the intended primary application of this standard is stated in its scope, it is important to note thatit remains the responsibility of the users of the standard to judge its suitability for their particular purpose.Level of harmonizationThis standard ado
30、pts the IEC text with national differences.This standard is published as an equivalent standard for ANCE and UL.An equivalent standard is a standard that is substantially the same in technical content, except as follows:Technical national differences are allowed for codes and governmental regulation
31、s as well as thoserecognized as being in accordance with NAFTA Article 905, for example, because of fundamental climatic,geographical, technological, or infrastructural factors, scientific justification, or the level of protection thatthe country considers appropriate. Presentation is word for word
32、except for editorial changes.All national differences from the IEC text are included in the (ANCE and/or UL) versions of the standard.While the technical content is the same in each organizations version, the format and presentation maydiffer.MAY 6, 2011 NMX-J-538/7-3-ANCE UL 60947-7-3 5UL COPYRIGHT
33、ED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULReasons for differences from IECThis standard adopts the IEC text with national differences. Throughout the standard, national differenceshave been identified for the countries to which they apply. These dif
34、ferences are necessary in order tomaintain compliance with existing nationally based codes and regulations, or to take into account essentialsafety practices or market based preferences.InterpretationsThe interpretation by the standards development organization of an identical or equivalent standard
35、 isbased on the literal text to determine compliance with the standard in accordance with the proceduralrules of the standards development organization. If more than one interpretation of the literal text has beenidentified, a revision is to be proposed as soon as possible to each of the standards d
36、evelopmentorganizations to more accurately reflect the intent.ANCE effective dateThe effective date for ANCE will be announced through the Diario Oficial de la Federacin (OfficialGazette) and is indicated on the cover page.UL effective dateAs of May 6, 2011 all products Listed or Recognized by UL mu
37、st comply with the requirements in thisstandard.A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSIapproved standard.IEC CopyrightFor ANCE, the text, figures, and tables of International Electrotechnical Commission Publication60947-7-3, Low-Voltage Sw
38、itchgear and Controlgear - Part 7-3: Ancillary Equipment - SafetyRequirements for Fuse Terminal Blocks, are used in this standard according to the guidelines provided inthe ISO/IEC/POCOSA.For UL, the text, figures and tables of IEC publication 60947-7-3, Low-Voltage Switchgear andControlgear Part 7-
39、3: Ancillary Equipment Safety Requirements for Fuse Terminal Blocks copyright2002 are used in this Standard with the consent of the IEC and the American National Standards Institute(ANSI). The IEC copyrighted material has been reproduced with permission from ANSI. ANSI should becontacted regarding t
40、he reproduction of any portion of the IEC material. The IEC Foreword andIntroduction are not a part of the requirements of this Standard but are included for information purposesonly. Copies of IEC Publication 60947-7-3 may be purchased from ANSI, 25 West 43rd Street, 4th Floor,New York, New York, 1
41、0036, (212) 642-4900.MAY 6, 2011NMX-J-538/7-3-ANCE UL 60947-7-36UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNATIONAL DIFFERENCESGENERALNational Differences from the text of International Electrotechnical Commission (IEC) Publication60947-7
42、-3, Low-Voltage Switchgear and Controlgear Part 7-3: Ancillary Equipment SafetyRequirements for Fuse Terminal Blocks, copyright 2002 are indicated by notations (differences) and arepresented in bold text.There are five types of National Differences as noted below. The difference type is noted on the
43、 first lineof the National Difference in the standard. The standard may not include all types of these NationalDifferences.DR These are National Differences based on the national regulatory requirements.D1 These are National Differences which are based on basic safety principles and requirements,eli
44、mination of which would compromise safety for consumers and users of products.D2 These are national differences from IEC requirements based on existing safety practices. Theserequirements reflect national safety practices, where empirical substantiation (for the IEC or nationalrequirement) is not av
45、ailable or the text has not been included in the IEC standard.DC These are National Differences based on the component standards and will not be deleted untila particular component standard is harmonized with the IEC component standard.DE These are National Differences based on editorial comments or
46、 corrections.Each national difference contains a description of what the national difference entails. Typically one of thefollowing words is used to explain how the text of the national difference is to be applied to the base IECtext:Addition / Add - An addition entails adding a complete new numbere
47、d clause, subclause, table, figure,or annex. Addition is not meant to include adding select words to the base IEC text.Replacement / Replace A replacement entails replacement of an entire clause, subclause, paragraph,table, figure, or annex with a new clause, subclause, paragraph, table, figure, or
48、annex.Modification / Modify - A modification is an altering of the existing base IEC text such as the addition,replacement or deletion of certain words or the replacement of an entire clause, subclause, table, figure,or annex of the base IEC text.Deletion / Delete - A deletion entails complete delet
49、ion of an entire numbered clause, subclause, table,figure, or annex without any replacement text.MAY 6, 2011 NMX-J-538/7-3-ANCE UL 60947-7-3 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTERNATIONAL ELECTROTECHNICAL COMMISSIONLOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 7-3: Ancillary equipment Safetyrequirements for fuse terminal blocksFOREWORD1) The IEC (International Electrotechnical Com
