1、 International Telecommunication Union ITU-T K.77TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 1(05/2011) SERIES K: PROTECTION AGAINST INTERFERENCE Characteristics of metal oxide varistors for the protection of telecommunication installations Corrigendum 1 Recommendation ITU-T K.77 (20
2、09) Corrigendum 1 Rec. ITU-T K.77 (2009)/Cor.1 (05/2011) i Recommendation ITU-T K.77 Characteristics of metal oxide varistors for the protection of telecommunication installations Corrigendum 1 Summary Corrigendum 1 to Recommendation ITU-T K.77 corrects reference defects given in Recommendation ITU-
3、T K.77 (2009). One reference has been withdrawn and merged with another reference. The reference and its associated text reference are changed. Other references are removed as they are not stated in the body of this Recommendation. Six references have been revised and their references are updated. H
4、istory Edition Recommendation Approval Study Group 1.0 ITU-T K.77 2009-01-13 5 1.1 ITU-T K.77 (2009) Cor.1 2011-05-05 5 ii Rec. ITU-T K.77 (2009)/Cor.1 (05/2011) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, info
5、rmation and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a wo
6、rldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in
7、 WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication admi
8、nistration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory pro
9、visions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention
10、 to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others out
11、side of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the l
12、atest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2011 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T K.77 (2009)/Cor.1 (05/2
13、011) iii Table of Contents Page 1 Scope 1 2 Resolved defects . 1 Rec. ITU-T K.77 (2009)/Cor.1 (05/2011) 1 Recommendation ITU-T K.77 Characteristics of metal oxide varistors for the protection of telecommunication installations Corrigendum 1 1 Scope International Standard IEC 60068-2-29:1987, Environ
14、mental testing Part 2-29: Tests Test Eb and guidance: Bump, has been merged into IEC 60068-2-27:2008, Environmental testing Part 2-27: Tests Test Ea and guidance: Shock. References previously made to IEC 60068-2-29 must be made to IEC 60068-2-27. Some references are not stated in the body of this Re
15、commendation and are therefore removed from the References clause. Six references have been revised and their references need to be updated. This corrigendum resolves these defects. 2 Resolved defects In the References clause 2, replace the published reference lines with the updated references shown
16、 below: IEC 60060-2 IEC 60060-2 (2010), High voltage test techniques Part 2: Measuring systems. IEC 60068-2-6 IEC 60068-2-6 (2007), Environmental testing Part 2-6: Tests Test Fc: Vibration (sinusoidal). IEC 60068-2-14 IEC 60068-2-14 (2009), Environmental testing Part 2-14: Tests Test N: Change of te
17、mperature. IEC 60068-2-20 IEC 60068-2-20 (2008), Environmental testing Part 2-20: Tests Test T: Test methods for solderability and resistance to soldering heat of devices with leads. IEC 60068-2-27 IEC 60068-2-27 (2008), Environmental testing Part 2-27: Tests Test Ea and guidance: Shock. IEC 61000-4
18、-2 IEC 61000-4-2 (2008), Electromagnetic compatibility (EMC) Part 4-2: Testing and measurement techniques Electrostatic discharge immunity test. In the References clause 2, delete the references shown below: IEC 60060-1 IEC 60060-1 (1989), High-voltage test techniques Part 1: General definitions and
19、 test requirements. IEC 60068-1 IEC 60068-1 (1988), Environmental testing Part 1: General and guidance. IEC 60068-2-13 IEC 60068-2-13 (1983), Environmental testing Part 2: Tests Test M: Low air pressure. IEC 60068-2-29 IEC 60068-2-29 (1987), Environmental testing Part 2: Tests Test Eb and guidance:
20、Bump. 2 Rec. ITU-T K.77 (2009)/Cor.1 (05/2011) IEC 60068-2-69 IEC 60068-2-69 (2007), Environmental testing Part 2-69: Tests Test Te: Solderability testing of electronic components for surface mounting devices (SMD) by the wetting balance method. IEC 60099-4 IEC 60099-4 (2006), Surge arresters Part 4
21、: Metal-oxide surge arresters without gaps for a.c. systems. IEC 61000-4-5 IEC 61000-4-5 (2005), Electromagnetic compatibility (EMC) Part 4-5: Testing and measurement techniques Surge immunity test. IEC 61051-1 IEC 61051-1 (2007), Varistors for use in electronic equipment Part 1: Generic specificati
22、on. IEC 61643-1 IEC 61643-1 (2005), Low-voltage surge protective devices Part 1: Surge protective devices connected to low-voltage power distribution systems Requirements and tests. IEC 61643-21 IEC 61643-21 (2000), Low voltage surge protective devices Part 21: Surge protective devices connected to
23、telecommunications and signalling networks Performance requirements and testing methods. IEC 61643-331 IEC 61643-331 (2003), Components for low-voltage surge protective devices Part 331: Specification for metal oxide varistors (MOV). In clause 8.5, Bump, replace in the first paragraph line: IEC 6006
24、8-2-29 with: IEC 60068-2-27 Printed in Switzerland Geneva, 2011 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunic
25、ation services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection again
26、st interference Series L Construction, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specificatio
27、ns of measuring equipment Series P Terminals and subjective and objective assessment methods Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
