1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21796-9 SANS 62271-310:2008 Edition 2 IEC/TR 62271-310:2008 Edition 2SOUTH AFRICAN NATIONAL STANDARD High-voltage switchgear and controlge
4、ar Part 310: Electrical endurance testing for circuit-breakers above a rated voltage of 52 kV This national standard is the identical implementation of IEC 62271-310:2008 and is adopted with the permission of the International Electrotechnical Commission. Published by SABS Standards Division 1 Dr La
5、tegan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 62271-310:2008 Edition 2 IEC/TR 62271-310:2008 Edition 2 Table of changes Ch
6、ange No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 67A, Electricity distribution systems and components High-voltage switchgear, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement
7、. This SANS document was published in September 2008. This SANS document supersedes SANS 62271-310:2005 (edition 1). This standard may only be used and printed by approved subscription and freemailing clients of the SABS. IEC/TR 62271-310 Edition 2.0 2008-03 TECHNICAL REPORT RAPPORT TECHNIQUE High-v
8、oltage switchgear and controlgear Part 310: Electrical endurance testing for circuit-breakers above a rated voltage of 52 kV Appareillage haute tension Partie 310: Essais dendurance lectrique pour disjoncteurs de tension assigne suprieure 52 kV INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION EL
9、ECTROTECHNIQUE INTERNATIONALE S ICS 29.130.10 PRICE CODE CODE PRIX ISBN 2-8318-9668-1 SANS 62271-310:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 TR 62271-310 IEC:2008 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative reference
10、s .6 3 Terms and definitions .6 4 Test procedure .6 4.1 General explanation to the extended electrical endurance test programme7 4.2 Extended electrical endurance qualification obtained separately from type tests10 4.3 Extended electrical endurance qualification combined with type tests12 Annex A (i
11、nformative) Explanatory notes .14 Bibliography21 Figure A.1 Estimated number of equivalent T60 stresses for various rated voltages and rated short-circuit breaking currents.18 Table 1 Correlation between capacitive voltage factors used for standard capacitive type tests and capacitive voltage factor
12、s to be used for extended electrical endurance capacitive current acceptance tests 9 Table 2 Test sequence and criteria for extended electrical endurance tests obtained separately from type tests.10 Table 3 Test conditions for extended electrical endurance tests obtained separately from type tests11
13、 Table 4 Equivalent number of breaking operations.12 Table 5 Defined number M 90of number of T60 tests combined with type testing12 Table 6 Example of combination of type test with E2 test for a 50 kA circuit-breaker in synthetic test.13 Table A.1 List of countries involved in the data collection 15
14、 Table A.2 Used reference data 16 Table A.3 Number of breaking operations in various ranges of interrupted current in service during 25 years.18 Table A.4 Estimated number M 99of T60 breaking operations to cover 99 % of field stresses19 SANS 62271-310:2008This standard may only be used and printed b
15、y approved subscription and freemailing clients of the SABS.TR 62271-310 IEC:2008 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 310: Electrical endurance testing for circuit-breakers above a rated voltage of 52 kV FOREWORD 1) The International Electrotech
16、nical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To thi
17、s end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National
18、Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO)
19、in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from
20、 all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be hel
21、d responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any di
22、vergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publicatio
23、n. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property
24、damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this
25、publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or a
26、ll such patent rights. The main task of IEC technical committees is to prepare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard,
27、for example “state of the art“. IEC/TR 62271-310, which is a technical report, has been prepared by subcommittee 17A: High-voltage switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear. This second edition of IEC/TR 62271-310 cancels and replaces the first edition pub
28、lished in 2004. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: reduction of number tests in the wear stage; SANS 62271-310:2008This standard may only be used and printed by approved subscription a
29、nd freemailing clients of the SABS. 4 TR 62271-310 IEC:2008 new definition of acceptance test for demonstration of end-of-life thermal interruption capability. The text of this technical report is based on the following documents: Enquiry draft Report on voting 17A/803/DTR 17A/814/RVC Full informati
30、on on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of IEC 62271 series, under the general title High-voltage switchgear
31、and controlgear can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publ
32、ication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. SANS 62271-310:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.TR 62271-310 IEC:2008 5 INTRODUCTION Based on experience with existing high-voltage circuit-br
33、eakers in service and with system protection and maintenance policies, the majority of circuit-breaker applications are covered by class E1 as defined in 3.4.112 of IEC 62271-100. No additional tests for extended electrical endurance are required. However, extended electrical endurance (class E2) as
34、 defined in 3.4.113 of IEC 62271-100 should be considered for the following reasons: Field experience collected so far by CIGRE is limited only for circuit-breaker designs available before 1994 (see for example reference 1, 2, 3 1and Annex A.3). For this reason, the data collected by CIGRE so far ca
35、n hardly be extrapolated to new designs. Therefore, for new types of circuit-breakers, extended electrical endurance can only be fully proven by laboratory tests. New maintenance practices tend towards “maintenance-free” circuit-breakers. The reduction of maintenance costs is a major issue for most
36、users today. Deregulation of the electricity market may increase the electrical stresses applied to the circuit-breakers, within their proven capability. Installation of generation capacity by independent power producers will increase short-circuit levels in certain areas and consequently change str
37、esses on breakers. This may result in higher stresses applied to circuit-breakers compared to past practice when the short-circuit rating of the circuit- breaker was in large excess of the actual fault currents. There is a need to standardize a single extended electrical endurance programme to avoid
38、 the specification of different programmes from different users. Many manufacturers provide information about electrical endurance capabilities of circuit- breakers during the purchasing process. There is a need to standardize the way this information is given to the users. It must be noted that cir
39、cuit-breakers having extended electrical endurance capability, are not intended for use in situations in which electrical arcing stress (which is a combination of high probability of fault occurrence and high fault current level) is beyond the 90-percentile of the electrical arcing stress, as summar
40、ized by the CIGRE survey 1 and calculations based on this material 3. In other words, for networks that are prone to a very high electrical arcing stress, a custom made test programme, not covered by this technical report, is needed (see Clause A.7). Similarly, if users consider an interval between
41、major maintenance of the electrical wearing parts of the interrupters of more than 25 years, a custom made test programme has to be considered. When extended electrical endurance capability is required, this capability is demonstrated by the standardized test programmes outlined below as applicable
42、to overhead line circuit- breakers above a rated voltage of 52 kV. 1Figures in square brackets refer to the bibliography. SANS 62271-310:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 6 TR 62271-310 IEC:2008 HIGH-VOLTAGE SWITCHGEAR AND CO
43、NTROLGEAR Part 310: Electrical endurance testing for circuit-breakers above a rated voltage of 52 kV 1 Scope This technical report is applicable to class E2 circuit-breakers above a rated voltage of 52 kV for use on overhead lines. The test programmes are based on accumulated electrical stresses due
44、 to current interruption during a period of 25 years, which was chosen as representative for a maintenance-free interval. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undate
45、d references, the latest edition of the referenced document (including any amendments) applies. IEC 62271-100, High-voltage switchgear and controlgear Part 100: Alternating-current circuit-breakers 3 Terms and definitions For the purposes of this document, the following terms and definition applies.
46、 3.1 circuit-breaker class E2 (circuit-breaker with extended electrical endurance) circuit-breaker designed so as not to require maintenance of the interrupting parts of the main circuit during its expected operating life NOTE “Expected operating life” in this definition means a minimum period of us
47、e without maintenance of the interrupting parts. Normally the life expectancy of the design is higher. 4 Test procedure The tests should be carried out on a specimen identical as per 6.1.2 and 6.101.1.1 of IEC 62271-100, to one of those already submitted or to be submitted to type tests. All tests s
48、hould be performed as single-phase tests. In combination with type tests, three- phase tests are acceptable. No intermediate maintenance should be carried out during the extended electrical endurance test programme. The test programmes as described in 4.2 and 4.3 are divided into a wear stage follow
49、ed by acceptance tests. During the wear stage, the circuit-breaker will be stressed with the equivalent number of accumulated breaking operations, but, for convenience of testing, without specified TRV, except when basic short-circuit test duties are used as described in 4.3. SANS 62271-310:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.TR 62271-310 IEC:2008 7 The acceptance tests should follow the we
