UL 4248-19-2015 UL Standard for Safety Fuseholders C Part 19 Photovoltaic Fuseholders (First Edition).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 4248-19 Fuseholders Part 19: Photovoltaic FuseholdersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUT

2、HORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fuseholders Part 19: Photovoltaic Fuseholders UL 4248-19 First Edition, Dated November 13, 2015 Summary of Topics This is the First Edition of ANSI/UL 4248-19, the Standard for Photovoltaic Fusehol

3、ders includes fuseholders systems rated to 1500 Vdc. As noted in the Commitment for Amendments statement located on the back side of the title page, UL, CSA, and ANCE are committed to updating this harmonized standard jointly. The new requirements are substantially in accordance with Proposal(s) on

4、this subject dated January 30, 2015 and August 21, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides

5、 this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of p

6、rots, 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 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

7、 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 harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or de

8、viation introduced while purchaser is storing an electronic Standard on the purchasers computer system. NOVEMBER 13, 2015 UL 4248-19 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 13, 2015 UL 4248-19 tr2 No Text on This PageUL C

9、OPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-009/4248/19-ANCE First Edition CSA Group CSA C22.2 No. 4248.19 First Edition Underwriters Laboratories Inc. UL 4248-19 First Edition Fuseholders

10、 Part 19: Photovoltaic Fuseholders November 13, 2015 ANSI/UL 4248-19-2015UL 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),

11、the Canadian Standards Association (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 anytime. Revisions to this standard will be made only after processing according to th

12、e standards development procedures 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 dat

13、e of issue as the CSA Group and UL pages. Copyright 2015 Rights reserved in favor of ANCE. ISBN 978-1-77139-678-3 2015 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This Standard is subject to period

14、ic 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 inquirescsagroup.org and include Proposal for change in the subject line: Standard designation (number); relevant clause, table, and

15、/or gure number; wording of the proposed change; and rationale for the change. To purchase CSA Group Standards and related publications, visit CSA Groups Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044. Copyright 2015 Underwriters Laboratories Inc. ULs Standards for Safe

16、ty 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. This ANSI/UL Standard for Safety consists of the F

17、irst Edition. The most recent designation of ANSI/UL 4248-19 as an American National Standard (ANSI) occurred on November 13, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. Comments or proposals for revisions on any

18、 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 System (CSDS) at http:/. To purchase UL Standards, visit Comm 2000 at http:/m- or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NO

19、T AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS PREFACE 4 1 Scope .5 2 General 5 3 Characteristics 5 3.1 Classication .5 3.2 Voltage and current rating .5 3.3 Withstand rating 5 4 Markings .5 5 Construction 6 6 Tests 6 6.1 Verication of temperature rise .6 N

20、OVEMBER 13, 2015 NMX-J-009/4248/19-ANCE CSA C22.2 NO. 4248.19 UL 4248-19 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PREFACE This is the harmonized ANCE, CSA Group, and UL standard for Fuseholders Part 19: Photovoltaic Fuseholders. It i

21、s the rst edition of NMX-J-009/4248/19-ANCE , the rst edition of CAN/CSA-C22.2 No 4248.19, and the rst edition of UL 4248-19. This harmonized standard was prepared by the Association of Standardization and Certication, (ANCE), CSA Group and Underwriters Laboratories Inc. (UL). The efforts and suppor

22、t of the Technical Harmonization Subcommittee, 32B, Fuses, Fuseholders , on the Harmonization of Electrotechnical Standards of the Nations of the Americas (CANENA), are gratefully acknowledged. The present Mexican standard was developed by the CT 32 “Fusibles” from the Comite de Normalizacion de la

23、Asociacion de Normalizacion y Certicacion, A.C., CONANCE, with the collaboration of the manufacturers and users of fuseholders. This standard was reviewed by the CSA Subcommittee on Fuses and Fuseholders, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strate

24、gic Steering Committee on requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. Application of Standard Where reference is made to a spec

25、ic number of samples to be tested, the specied number is to be considered a minimum quantity. Note: Although the intended primary application of this standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for

26、their particular purpose. Interpretations The interpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If m

27、ore than one interpretation of the literal text has been identied, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reect the intent. NOVEMBER 13, 2015 NMX-J-009/4248/19-ANCE CSA C22.2 NO. 4248.19 UL 4248-19 4UL COPYRIGHTED MATERI

28、AL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Fuseholders Part 19: Photovoltaic Fuseholders 1 Scope 1.1 This Part applies to Fuseholders for Photovoltaic (PV) Systems rated to 1500 Vdc. 1.2 This Part applies to PV fuseholders that accommodate PV fuses as descr

29、ibed in the Standard for Photovoltaic Fuses, CSA C22.2 No. 248-19 / UL 248-19 to be employed in Photovoltaic (PV) systems and that are intended to be used in accordance with the Canadian Electrical Code, Part I, and National Electrical Code. 1.3 Fuseholders that meet another Part shall also comply w

30、ith those requirements of that Part. 2 General 2.1 This Part is intended to be read together with the Standard for Low-Voltage Fuseholders Part 1: General Requirements, NMX-J-009/4248/1-ANCE CAN/CSA C22.2 No. 4248.1 UL 4248-1 hereafter referred to as Part 1. The requirements of Part 1 apply unless m

31、odied by this Part. 2.2 For products intended for use in Canada, general requirements are given in CAN/CSA-C22.2 No. 0, General Requirements Canadian Electrical Code, Part II. 3 Characteristics 3.1 Classication 3.1.1 Fuseholders for use with photovoltaic (PV) fuses shall have a minimum short-circuit

32、 withstand rating of 10 kA and shall be rated 1,500 Vdc maximum. 3.2 Voltage and current rating 3.2.1 Fuseholders for use with photovoltaic (PV) fuses may be rated 1500 Vdc maximum, and the preferred ratings are 600 V, 750 V, 1,000 V, 1,250 V, and 1,500 V. 3.3 Withstand rating 3.3.1 Fuseholders for

33、use with photovoltaic (PV) fuses shall have a minimum short-circuit withstand rating of 10 kA. 4 Markings 4.1 Fuseholders for use with photovoltaic (PV) fuses shall be marked in accordance with Part 1. In the United States, the French markings are not required. 4.2 The information on a fuseholder sh

34、all be legible and include the following: a) Use Photovoltaic (PV) Fuses” or equivalent and Utiliser des fusibles photovoltaques or the equivalent; b) “Line” and “Load” for panel mount and in-line fuseholders and Secteur et Charge; NOVEMBER 13, 2015 NMX-J-009/4248/19-ANCE CSA C22.2 NO. 4248.19 UL 42

35、48-19 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL c) DO NOT OPEN or REMOVE UNDER LOAD or equivalent and NE PAS UTILISER SOUS CHARGE or the equivalent (intended for modular design photovoltaic (PV) fuseholders such that the fuse is inser

36、ted or removed by use of a carrier); and d) Do Not Connect or Disconnect under Load or equivalent and NE PAS BRANCHER OU DBRANCHER SOUS CHARGE or the equivalent (intended for photovoltaic (PV) fuseholders that include a wire connector feature). 4.3 PV Fuseholders employing an integral, non-user repl

37、aceable fuse need not bear the markings specied in 4.2 (a) (d). 5 Construction 5.1 In addition to the requirements of Part 1, in-line photovoltaic fuseholders that include a wire connector feature or are intended for unprotected outdoor use shall comply with the requirements of the Standard For Conn

38、ectors for use In Photovoltaic Systems, UL 6703, or CSA TIL A-36, Interim Certication Requirements for Connectors Intended for Use in Photovoltaic Systems. 6 Tests 6.1 Verication of temperature rise 6.1.1 Test method 6.1.1.1 If the fuse and fuseholder form an integral device intended to be replaced

39、as a unit, then the actual fuse, not a dummy fuse, may be used in testing. If the actual fuse is used, the applicable temperature limits shall be the limits specied in Table 1 plus 20C. 6.1.1.2 The temperatures specied in Table 1 are based on an assumed ambient temperature of 25C (77F). A test may b

40、e conducted at an ambient temperature within the range of 20 40C (68 104F). 6.1.1.3 If a test is conducted at an ambient temperature other than 25C (77F), an observed temperature shall be corrected as described in 6.1.1.4. No corrected temperature shall exceed the required value specied in Table 1.

41、6.1.1.4 An observed temperature shall be corrected by addition if the ambient temperature is lower than 25C (77F) or subtraction (if the ambient temperature is higher than 25C) of the difference between 25C and the ambient temperature. 6.1.1.5 If a corrected temperature exceeds the required value sp

42、ecied in Table 1, at the request of the manufacturer, the test may be repeated at an ambient temperature closer to 25C (77F). NOVEMBER 13, 2015 NMX-J-009/4248/19-ANCE CSA C22.2 NO. 4248.19 UL 4248-19 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION

43、FROM UL 6.1.2 Acceptability of test results 6.1.2.1 The temperature limits shown in Table 1 shall not be exceeded. Table 1 Maximum temperature (based on an ambient of 25C) Materials and components C (F) Bus, strap, or fuse clip 55 (131) Pressure terminal connectors for eld installed conductors 55 a

44、(131 a ) Wire insulation or insulating tubing 40 b (104 b ) Electrical tape 60 b (140 b ) Varnished cloth insulation 65 b (149 b ) Fiber employed as electrical insulation 70 b (158 b ) Sealing compound 55 b (131 b ) Polymeric materials used for electrical insulation or other part where the deteriora

45、tion would result in a hazard RTI-20 c (RTI-68 c ) a Applicable to a connector for copper wire. This shall also be applicable to a connector for aluminum wire or aluminum-bodied connector if the connector has a temperature rating of 90C (194F). b Consideration shall be given for the heating effect r

46、esulting from the use of actual fuses. Materials that have been previously proven acceptable for use at higher temperatures shall be suitable for use at 20C less than the previously established temperature ratings. c RTI shall be the lower of the mechanical and electrical Relative Thermal Indices fo

47、r the polymeric material used or the established RTI when tested in accordance with CAN/CSA-C22.2 No. 0.17 or the Standard for Polymeric Materials Use in Electrical Equipment Evaluations, UL 746C. 6.1.3 Verication of withstand rating 6.1.3.1 The requirements of Part 1 shall apply except for the foll

48、owing: a) Two single-pole fuseholders shall be wired in series and placed side by side; and b) Multi-pole fuseholders shall have their poles wired in series. 6.1.3.2 A PV fuseholder shall be investigated with the intended fuse or fuses marked on the device in accordance with 4.1. Multiple tests may be required. NOVEMBER 13, 2015 NMX-J-009/4248/19-ANCE CSA C22.2 NO. 4248.19 UL 4248-19 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 13, 2015 NMX-J-009/4248/19-ANCE CSA C22.2 NO. 4248.19 UL 4248-19 8 No Text on This Page