UL 497C-2001 UL Standard for Safety Protectors for Coaxial Communications Circuits (Second Edition Reprint with Revisions Through and Including February 10 2017)《同轴通信电路用保护器》.pdf
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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 497C Protectors for Coaxial Communications CircuitsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHO
2、RIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Protectors for Coaxial Communications Circuits, UL 497C Second Edition, Dated August 3, 2001 Summary of Topics This revision of ANSI/UL 497C is being issued to reaffirm ANSI approval of the Standard.
3、 Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on w
4、hich the changed requirement becomes effective. The revisions are substantially in accordance with Proposal(s) on this subject dated October 26, 2012. 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
5、, 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 or tness for any purpose. In no event will UL be liabl
6、e 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 representative has been advised of the possibility of s
7、uch 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 harmless from and against any loss, expense, liability, d
8、amage, 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 effect, except for those paragraphs, sections, tables, gu
9、res, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS no
10、tice. DECEMBER 21, 2012 UL 497C tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 21, 2012 UL 497C tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL A
11、UGUST 3, 2001 (Title Page Reprinted: December 21, 2012) 1 UL 497C Standard for Protectors for Coaxial Communications Circuits First Edition March, 1998 Second Edition August 3, 2001 This ANSI/UL Standard for Safety consists of the Second Edition including revisions through December 21, 2012. The mos
12、t recent designation of ANSI/UL 497C as a Reaffirmed American National Standard (ANS) occurred on December 21, 2012. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Stan
13、dard 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:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way.
14、All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2012 UNDERWRITERS LABORATORIES INC. ANSI/UL 497C-2004 (R2012)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
15、 PERMISSION FROM UL JUNE 14, 2004 PROTECTORS FOR COAXIAL COMMUNICATIONS CIRCUITS - UL 497C 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .7 2 General 7 2.1 Components .7 2.2 Units of meas
16、urement .8 2.3 Undated references .8 3 Glossary .8 CONSTRUCTION 4 General 9 5 Enclosures 10 5.1 General 10 5.2 Sheet metal 10 5.3 Nonmetallic .12 6 Protection Against Corrosion 13 6.1 General 13 6.2 Outdoor use 13 6.3 Grommets 13 7 Field-Wiring Connections .14 8 Components 15 8.1 General 15 8.2 Arre
17、ster assemblies 15 8.3 Electrical insulation material 15 9 Spacings 15 PERFORMANCE 10 General 18 11 I 2 t Limiting Test .22 12 Abnormal Sustained Current Test .23 13 Component Temperature Test 25 14 Breakdown Voltage Measurement Test 26 15 Impulse Sparkover Voltage Measurement Test .27 16 Limited Sh
18、ort-Circuit Test 27 17 High Current Ground Path Test .30 18 Cable Shield Fuse Test 31 19 Endurance Conditioning Test .31 20 Induced Low Current Test .32 21 Distortion Test 32 22 Flame Test .32 23 Impact Test (Polymeric Enclosures) .33 24 Jarring Test 34 25 Water Spray Test .34 26 Leakage Current Tes
19、t .38 27 Dielectric Voltage-Withstand Test .39 28 Ultraviolet Light and Water Exposure 40 JUNE 14, 2004 PROTECTORS FOR COAXIAL COMMUNICATIONS CIRCUITS - UL 497C 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 29 Tensile Strength and Elongat
20、ion Tests 41 30 Air Oven Aging Test 42 31 Ozone Exposure Test .42 32 Indoor Corrosion Test .42 32.1 General .42 32.2 Hydrogen sulde exposure 43 32.3 Sulfur dioxide-carbon dioxide 43 33 Outdoor Corrosion Test 43 33.1 General .43 33.2 Hydrogen sulde exposure 43 33.3 Sulfur dioxide-carbon dioxide expos
21、ure .43 33.4 Salt spray exposure 44 MARKINGS 34 General 44 INSTALLATION INSTRUCTIONS 35 General 45 AUGUST 3, 2001 PROTECTORS FOR COAXIAL COMMUNICATIONS CIRCUITS - UL 497C 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 3, 2001 PROTEC
22、TORS FOR COAXIAL COMMUNICATIONS CIRCUITS - UL 497C 5 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. JUNE 14, 2004 PROTECTORS FOR COAXIAL COMMUNICATIONS CIRCUITS - UL 497C 6UL COPYRIGHT
23、ED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover protectors for use on coaxial cable circuits to be used in accordance with the applicable requirements of the National Electrical Code, NFPA 70. 1.2 As cov
24、ered by these requirements, a coaxial cable circuit protector consists of single or multiple air gap arresters, gas tube arresters, or solid-state arresters, with or without fuses or other current-limiting devices. A circuit protector is intended to protect equipment, wiring, and personnel at the su
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