ANSI UL 248-19-2015 UL Standard for Safety Low-Voltage Fuses C Part 19 Photovoltaic Fuses (First Edition Reprint with Revisions Through and Including FEBRUARY 1 2016).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 248-19 Low-Voltage Fuses Part 19: Photovoltaic Fuses STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHT

2、ED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Low-Voltage Fuses Part 19: Photovoltaic Fuses UL 248-19 First Edition, Dated November 13, 2015 Summary of Topics This revision of ANSI/UL 248-19 is editorial and is issued to cor

3、rect the title of the Standard to change Fuses to “Low-Voltage Fuses”. 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. All rights reserved. No part of this publication may be

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8、 1, 2016 UL 248-19 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 1, 2016 UL 248-19 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association o

9、f Standardization and Certication NMX-J-009/248/19-ANCE First Edition CSA Group CSA C22.2 No. 248.19 First Edition Underwriters Laboratories Inc. UL 248-19 First Edition Low-Voltage Fuses Part 19: Photovoltaic Fuses November 13, 2015 (Title Page Reprinted: February 1, 2016) ANSI/UL 248-19-2015UL COP

10、YRIGHTED 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 Association (operating as “CSA Group”), and Underwriters

11、 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 the standards development procedures of ANCE, CSA Group, and UL. CSA Group and UL

12、 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 UL pages. Copyright 2015 Rights reserved in fav

13、or 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 periodic review, and suggestions for its improvement will be referred to the appropri

14、ate 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/or gure number; wording of the proposed change; and rationale for the change.

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16、hould 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 First Edition including revisions through February 1, 2016. The most recent desi

17、gnation of ANSI/UL 248-19 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 part of the Standard may be submit

18、ted 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 NOT AUTHORIZED FOR FURTHER REPRODUCTI

19、ON 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 rating 5 3.3 Frequency .6 3.4 Interrupting rating .6 3.5 Peak let-through current and clearing I 2 t characteristics .6 4 Markings .6 5 Construction 6 6 Tests 6

20、 6.1 General .6 6.2 Verication of temperature rise and current-carrying capacity 7 6.3 Verication of overload operation .8 6.4 Verication of operation at rated voltage .8 6.5 Verication of peak let-through characteristics and I 2 t. 8 6.6 Special environment conditions .8 6.7 Current cycling .9 NOVE

21、MBER 13, 2015 NMX-J-009/248/19-ANCE CSA C22.2 NO. 248.19 UL 248-19 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 Fuses Part 19: Photovoltaic Fuses. It is the rst edition

22、of NMX-J-009/248/19-ANCE , the rst edition of CAN/CSA-C22.2 No 248.19, and the rst edition of UL 248-19. This harmonized standard was prepared by the Association of Standardization and Certication, (ANCE), CSA Group and Underwriters Laboratories Inc. (UL). The efforts and support of the Technical Ha

23、rmonization Subcommittee, THC 32B under CANENA 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 Asociacion de Normalizacio

24、n y Certicacion, A.C., CONANCE, with the collaboration of the manufacturers and users of fuses. 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 Strategic Steering Committee on requ

25、irements 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 specic number of samples to be tes

26、ted, 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 their particular purpose. Inte

27、rpretations 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 more than one interpretation of

28、 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-009/248/19-ANCE CSA C22.2 NO. 248.19 UL 248-19 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP

29、RODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Low-Voltage Fuses Part 19: Photovoltaic Fuses 1 Scope 1.1 This Part applies to fuses for photovoltaic (PV) systems rated up to 1500 Vdc. 1.2 Fuses for photovoltaic (PV) systems are intended to be used for the protection of photovoltaic strings or

30、arrays and their associated wiring to provide protection against overloads or short circuits within the marked electrical ratings in accordance with the Canadian Electrical Code (CSA C22.1 Canadian Electrical Code Part I) in Canada, the Standard for Electrical Installations, NOM-001-SEDE, in Mexico

31、and the National Electrical Code NEC), NFPA-70, in the United States of America. 1.3 These types of fuses are not intended to protect downstream inverter components, such as capacitors and against the discharge of such capacitors back into the arrays. 2 General 2.1 This Part is intended to be read t

32、ogether with the Standard for Low-Voltage Fuses Part 1: General Requirements, NMX-J-009/248/1-ANCE CAN/CSA C22.2 No. 248.1-11 UL 248-1, hereafter referred to as Part 1. The requirements of Part 1 apply unless modied by this Part. 2.2 For products intended for use in Canada, general requirements are

33、given in CAN/CSA-C22.2 No. 0, General Requirements Canadian Electrical Code, Part II. 3 Characteristics 3.1 Classication 3.1.1 Fuses for photovoltaic (PV) systems shall: a) Be non-renewable; and b) Have an minimum interrupting rating of 10 kA minimum. 3.2 Voltage rating 3.2.1 The voltage rating may

34、be up to 1500 Vdc. Preferred ratings are 600 V, 750 V, 1000 V, 1250 V, and 1500 V. FEBRUARY 1, 2016 NMX-J-009/248/19-ANCE CSA C22.2 NO. 248.19 UL 248-19 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.3 Frequency 3.3.1 Not applicable. 3.4

35、 Interrupting rating 3.4.1 The interrupting rating shall be 10 kA minimum. 3.5 Peak let-through current and clearing I 2 t characteristics 3.5.1 Not applicable. 4 Markings 4.1 Fuses shall be marked as indicated in the Standard for Low-Voltage Fuses Part 1: General Requirements, CSA C22.2 No. 248-1 /

36、 UL 248-1, with additional requirements provided as follows: a) The fuse shall be marked, with the letters “PV” or “gPV”; or b) The text, “Photovoltaic Fuse”. 4.2 Fuses with integral wiring terminations shall also be marked in accordance with the Standard for Wire Connectors, UL 486A-486B / CSA C22.

37、2 No. 65. The marking may be on the fuse, the smallest unit container, or an information sheet. 5 Construction 5.1 In addition to meeting the construction requirements of the Standard for Low-Voltage Fuses Part 1: General Requirements, CSA C22.2 No. 248-1 / UL 248-1, a fuse with integral wiring term

38、inations shall also meet the construction requirements of the Standard for Wire Connectors, UL 486A-486B / CSA C22.2 No. 65. 5.2 The dimensions are not specied but shall be in accordance with the manufacturers specications. 6 Tests 6.1 General 6.1.1 A fuse with integral wiring terminations shall add

39、itionally be investigated to the mechanical sequence requirements of the Standard for Wire Connectors, UL 486A-486B / CSA C22.2 No. 65. 6.1.2 For fuses with integral wiring terminations, all test samples shall be wired based on the instructions of the manufacturer. 6.1.3 For fuses 100 Amps and great

40、er, the number of samples shall be 3 for the current cycling test (See 6.7) in Table 1. NOVEMBER 13, 2015 NMX-J-009/248/19-ANCE CSA C22.2 NO. 248.19 UL 248-19 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 1 Number of fuses to be tes

41、ted Test Test Temperature 50 C Ambient 6.2 Verication of temperature rise and I n 3 6.3 Verication of overload operation a) t max (1.35 I n ) 3 b) t max (2.0 I n ) 2 6.4 Verication of operation at rated voltage a) 2.0 I n 1 b) manufacturers declared interrupting rating A 1 6.6.1 Thermally induced dr

42、ift Verication of temperature rise and I n 3 Verication of overload operation a) t max (1.35 I n )3 b) t max (2.0 I n )3 Verication of operation at rated voltage a) 2.0 I n 3 b) manufacturers declared interrupting rating kA 3 6.6.2 Temperature extremes Verication of I n 1 Verication of overload oper

43、ation t max (1.35 I n ) 1 6.7 Current cycling 18 6.2 Verication of temperature rise and current-carrying capacity 6.2.1 Test method 6.2.1.1 1.0 I n Temperature rise and current carrying capacity at 1.0 I n . 6.2.2 Acceptability of test results 6.2.2.1 In addition to the requirements in Part 1, the m

44、aximum temperature rise for contacts shall not exceed 130C. NOVEMBER 13, 2015 NMX-J-009/248/19-ANCE CSA C22.2 NO. 248.19 UL 248-19 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.3 Verication of overload operation 6.3.1 In the Standard fo

45、r Low-Voltage Fuses Part 1: General Requirements, CSA C22.2 No. 248-1 / UL 248-1, the following from Table 4, Verication of overload operation, shall apply: a) Test 1 1.35 I n ; and b) Test 3 2.0 I n . 6.4 Verication of operation at rated voltage 6.4.1 In the Standard for Low-Voltage Fuses Part 1: G

46、eneral Requirements, CSA C22.2 No. 248-1 / UL 248-1, the following from Table 6, Verication of operation at rated voltage for DC shall apply: a) Test 1 10kA or higher; the test circuit shall have an inductance of 100 H ( 10%) b) Test 5c2I n ; the test circuit shall have an inductance of 100 H ( 10%)

47、 6.5 Verication of peak let-through characteristics and I 2 t. 6.5.1 Not applicable 6.6 Special environment conditions 6.6.1 Thermally induced drift 6.6.1.1 Fifteen fuses, of each rating and type, shall be subjected to 50 cycles of heating and cooling conditioning as follows: a) Minus 40C for 15 min

48、utes; and b) 90C for 15 minutes. 6.6.1.2 Following the 50 cycles, the fuses shall be placed in a room ambient temperature of 23 3C (73.4 5F) for no less than 3 hours. The time required to transition from minus 40C (104F) to 90C (194F) is not specied. 6.6.1.3 Three conditioned samples, of each rating

49、 and type, shall be tested as in accordance with 6.2 for verication of current carrying capacity (I n ) only. 6.6.1.4 Three conditioned samples, of each rating and type, shall be tested as in accordance with6.3 for verication of overload operation. See Table 1 for the total number of samples to be tested. 6.6.1.5 Three conditioned samples, of each rating and type, sh