UL 4248-12-2007 UL Standard for Safety Fuseholders C Part 12 Class R (First Edition Reprint with revisions through and including December 21 2012)《熔断器支持件 第12部分 R级》.pdf
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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 4248-12 Fuseholders Part 12: Class RUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTH
2、ER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fuseholders Part 12: Class R, UL 4248-12 First Edition, Dated February 28, 2007 Summary of Topics This revision to ANSI/UL 4248-12 is being issued to update the UL approval date per a UL Standards reaffirmation of
3、ANSI/UL 4248-12, NMX-J-009/4248/12-ANCE, and CSA C22.2 No. 4248.12-07. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval syst
4、em, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability
5、 or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL
6、representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL ha
7、rmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in ef
8、fect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the preface. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded b
9、y a SUPERSEDED REQUIREMENTS notice. DECEMBER 21, 2012 UL 4248-12 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 21, 2012 UL 4248-12 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR
10、IBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-009/4248/12-ANCE First Edition CSA Group CSA C22.2 No. 4248.12-07 First Edition Underwriters Laboratories Inc. UL 4248-12 First Edition Fuseholders Part 12: Class R February 28, 2007 (Title Page Reprinted: Decemb
11、er 21, 2012) ANSI/UL 4248-12-2007 (R2012)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Association of Standardization and Certication (ANCE), the Canadian Standards Associati
12、on (operating as “CSA Group”), and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA Group, or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedu
13、res of ANCE, CSA Group, and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ANCE will incorporate the same revisions into a new edition of the standard bearing the same date of issue as the CSA Group and
14、 UL pages. Copyright 2007 ANCE Rights reserved in favor of ANCE. ISBN 1-55436-049-8 2007 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. To purchase the CSA Group Standards and related publications, vi
15、sit CSA Groups Online Store at shop.csa.ca or call toll-free 18004636727 or 4167474044. This Standard is subject to periodic review, and suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquirescs
16、agroup.org and include “Proposal for change” in the subject line: Standard designation (number); relevant clause, table, and/or gure number; wording of the proposed change; and rationale for the change. Copyright 2012 Underwriters Laboratories Inc. To purchase UL Standards, visit COMM 2000 at http:/
17、m- or call toll free 18888533503. This ANSI/UL Standard for Safety consists of the First Edition including revisions through December 21, 2012. The most recent designation of ANSI/UL 4248-12 as a Reaffirmed American National Standard (ANS) occurred on December 21, 2012. ANSI approval for a standard
18、does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development
19、 System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL.UL
20、COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .4 1 General 6 1.1 Scope .6 4 Classication .6 5 Characteristics 6 5.1 Summary of characteristics 6 6 Marking 6 6.1 Marking of fuseholder .6 7 Construction 6 7.6 Contacts of a cart
21、ridge fuseholder 6 8 Tests 9 8.1 General .9 8.4 Verication of temperature rise 10 8.6A Verication of effectiveness of rejection member .12 8.6A.2 Acceptability of test results 12 FEBRUARY 28, 2007 NMX-J-009/4248/12-ANCE CSA C22.2 NO. 4248.12-07 UL 4248-12 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
22、FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common ANCE, CSA Group, and UL standard for Fuseholders Part 12: Class R. It is the rst edition of NMX-J-009/4248/12-ANCE, the rst edition of CSA C22.2 No. 4248-12, and the rst edition of UL 4248-12. This common stan
23、dard was prepared by the Association of Standardization and Certication (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of the CANENA Technical Harmonization Subcommittee 32B Fuseholders are gratefully appreciated. This standard is considered suitable for use for
24、conformity assessment within the stated scope of the standard. This standard was reviewed by the CSA Subcommittee on Low voltage fuses, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has
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