SANS 62271-304-2008 High-voltage switchgear and controlgear Part 304 Design classes for indoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and includingns《.pdf

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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 978-0-626-21794-5 SANS 62271-304:2008 Edition 1 IEC/TS 62271-304:2008 Edition 1SOUTH AFRICAN NATIONAL STANDARD High-voltage switchgear and controlge

4、ar Part 304: Design classes for indoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and including 52 kV to be used in severe climatic conditions This national standard is the identical implementation of IEC 62271-304:2008 and is adopted with the permission of the Internati

5、onal Electrotechnical Commission. Published by SABS Standards Division 1 Dr Lategan 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.SAN

6、S 62271-304:2008 Edition 1 IEC/TS 62271-304:2008 Edition 1 Table of changes Change 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 th

7、e SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in September 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS. IEC/TS 62271-304 Edition 1.0 2008-05 TECHNICAL SPECIFICATION SP

8、CIFICATION TECHNIQUE High-voltage switchgear and controlgear Part 304: Design classes for indoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and including 52 kV to be used in severe climatic conditions Appareillage haute tension Partie 304: Classes de construction pour la

9、ppareillage dintrieur sous enveloppe pour tensions assignes partir de 1 kV jusqu 52 kV inclus pour usage sous conditions climatiques svres INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE P ICS 29.130.10 PRICE CODE CODE PRIX ISBN 2-8318-9828-5 SANS 62271-304:2008T

10、his standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 TS 62271-304 IEC:2008 CONTENTS FOREWORD.3 1 Scope and object5 2 Normative references .5 3 Degrees of severity of service conditions under condensation and pollution .6 4 Classification of enclos

11、ed switchgear and controlgear 7 5 Classification procedure .7 6 Test facilities and associated requirements 9 6.1 Climatic test room .9 6.2 Control requirements.9 6.3 Energizing facilities .9 7 Selection and arrangement of the equipment for test9 7.1 Selection of the equipment 9 7.2 Arrangement of t

12、he equipment 9 8 Ageing test .10 8.1 Level 1 ageing test10 8.2 Level 2 ageing test11 9 Diagnostic procedure after ageing test .11 9.1 General .11 9.2 Electrical diagnostic procedure12 9.3 Mechanical diagnostic procedure (optional).13 9.4 Evaluation .13 Annex A (normative) Climatic cycle14 Annex B (n

13、ormative) Climatic test room .15 Annex C (informative) Example of typical environment.16 Figure 1 Flow chart for classification procedure .8 Figure 2 Level 1 ageing test.11 Figure 3 Power-frequency withstand voltage test with high humidity after ageing test 12 Figure B.1 Climatic test room.15 Table

14、C.1 Example of typical environment .16 SANS 62271-304:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.TS 62271-304 IEC:2008 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 304: Design classes for i

15、ndoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and including 52 kV to be used in severe climatic conditions FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committe

16、es (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 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Re

17、ports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and

18、 non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreemen

19、ts 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 all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and

20、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 held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote in

21、ternational uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated i

22、n 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 Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC

23、 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 damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and exp

24、enses 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 publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Att

25、ention 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 all such patent rights. The main task of IEC technical committees is to prepare International Standards. In exceptional c

26、ircumstances, a technical committee may propose the publication of a technical specification when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts, or the subject is still under technical development or where, for any other reason, th

27、ere is the future but no immediate possibility of an agreement on an International Standard. Technical specifications are subject to review within three years of publication to decide whether they can be transformed into International Standards. IEC 62771-304, which is a technical specification, has

28、 been prepared by subcommittee 17C: High-voltage switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and controlgear. SANS 62271-304:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 4 TS 62271-304 IEC:2008 The t

29、ext of this technical specification is based on the following documents: Enquiry draft Report on voting 17C/402/DTS 17C/422A/RVC Full information on the voting for the approval of this technical specification can be found in the report on voting indicated in the above table. This first edition of IE

30、C/TS 62271-304 cancels and replaces the first edition of IEC/TR 60932, published in 1988, and constitutes a technical revision. This revised document has been basically changed to be updated to todays use of high- voltage switchgear and controlgear up to 52 kV. This publication has been drafted in a

31、ccordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC 62271 series, under the general title High-voltage switchgear and controlgear, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenanc

32、e 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 publication will be transformed into an International standard, reconfirmed, withdrawn, replaced by a revised edition, or amended. SANS 62271-304:2008This stan

33、dard may only be used and printed by approved subscription and freemailing clients of the SABS.TS 62271-304 IEC:2008 5 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 304: Design classes for indoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and including 52 kV to be used in

34、 severe climatic conditions 1 Scope and object This part of IEC 62271 applies to indoor enclosed switchgear and controlgear complying with IEC 62271-200 and IEC 62271-201, intended to be used in service conditions more severe with respect to condensation and pollution than the normal service conditi

35、ons specified in IEC 62271-1. This technical specification covers equipment where any of the insulation is exposed to indoor climatic conditions. The test detailed in this technical specification has been designed primarily to investigate the behaviour of electrical insulation and not corrosion on e

36、quipments. Nevertheless, the performance of mechanical components, such as mechanisms, interlocks and enclosures may also be recorded. This technical specification proposes definitions for two degrees of severe service conditions with respect to condensation and pollution. It also proposes test proc

37、edures for assessing the performance of enclosed switchgear and controlgear under specified conditions so that conclusions may be drawn concerning their suitability for service under those severe service conditions. In this technical specification, the term “equipment“ is used in accordance with the

38、 scope for an “enclosed assembly of switchgear and controlgear“ (see IEC 60050-441, definition 441-12- 02). NOTE The testing procedures described in this technical specification may also be applied to internal insulation of outdoor equipment. 2 Normative references The following referenced documents

39、 are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60060-1: High-voltage test techniques Part 1: General definitions and test requ

40、irements IEC 60068 (all parts), Environmental testing IEC 62271-1:2007, High-voltage switchgear and controlgear Part 1: Common specifications SANS 62271-304:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 6 TS 62271-304 IEC:2008 IEC 62271-

41、200, High-voltage switchgear and controlgear Part 200: A.C. metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV IEC 62271-201, High-voltage switchgear and controlgear Part 201: AC insulation-enclosed switchgear and controlgear for rated voltages abov

42、e 1 kV and up to and including 52 kV 3 Degrees of severity of service conditions under condensation and pollution Indoor equipment installed inside a building or room and thus normally protected against the outdoor climatic conditions may be subjected to condensation due to rapid temperature changes

43、 and to pollution due to the environment inside the building. The service conditions with respect to condensation and pollution around the enclosed switchgear and controlgear are designated and characterized as follows: C o : Condensation does not normally occur (not more than twice a year) Equipmen

44、t to be used in locations with humidity and/or temperature control in order to avoid condensation. The building or room provides protection from daily variations of outside climate. C L : Non-frequent condensation (not more than twice a month) Equipment to be used in locations without humidity and/o

45、r temperature control. The building or room provides protection from daily variations of outside climate, but condensation cannot be excluded. C H : Frequent condensation (more than twice a month) Equipment to be used in locations without temperature control. The building or room provides only minim

46、al protection from daily variations of outside climate, so that frequent condensation may occur. P L : Light pollution (as given in 2.1.1, item d) of IEC 62271-1) (see note 2 below) In order to reach light pollution in heavy polluted locations precautions may be necessary. P H : Heavy pollution (any

47、 value exceeding P L ) P Hdoes not include areas subject to conductive dust and/or to industrial smoke, producing thick conductive deposits. The location has no special precautions to minimize the presence of deposits, or the equipment is situated in close proximity to pollution sources. NOTE 1 Abse

48、nce of pollution is considered as unrealistic. At least light pollution is assumed. NOTE 2 IEC 62271-1, 2.1.1, item d): “The ambient air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapours or salt. The manufacturer will assume that, in absence of specific requirem

49、ents from the user, there are none.” NOTE 3 Precautions to minimize the amount of deposits inside the enclosure of the equipment may be taken by the choice of an appropriate degree of protection of the enclosed switchgear and controlgear. Taking into account the fact that the equipment is especially influenced by the combination of humidity and pollution, three degrees of severity of service conditions are defined as follows: SANS 62271-304:2008This standard may only be used and pri