1、CAN/CSA-C50068-99A National Standard of Canada(reaffirmed 2012)Wrought steel enclosures for gas-filled high-voltage switchgear and controIgearLAssociation canadienne de normalisation (CSA), sous es auspices d cet aspect demeure a responsabilit de lorganisme rdacteur de normes accrdit. II est recomma
2、nd aux personnes qui ont besoin de normes de se servir des Normes nationales du Canada lorsque Ia chose est possible. Ces normes font objet dexamens priodiques ; cest pourquoi il est recommand aux utilisateurs de se procurer edition Ia plus rcente de Ia norme auprs de lorganisme qui la prpare. The S
3、tandards Council of Canada is the coordinating body of the National Standards system, a federation of independent, autonomous organizations working towards the further development and improvement of voluntary standardization in the national interest. The pnndpal objects of the Council are to foster
4、and promote voluntary standardization as a means of advancing the national economy, benefiting the health, safety, and welfare of the public, assisting and protecting the consumer, fadlitating domestic and international trade, and furthering international cooperation in the held of standards. A Nati
5、onal Standard of Canada is a standard which has been approved by the Standards Council of Canada and one which reflects a reasonable agreement among the views of a number of capable individuals whose collective interests provide to the greatest practicable extent a balance of representation of produ
6、cers, users, consumers, and others with relevant interests, as may be appropriate to the subject in hand. It normaly is a standard which is capable of making a significant and timely contribution to the national interest. Approval of a standard as a National Standard of Canada indicates that a stand
7、ard conforms to the critetia and procedures established by the Standards Council of Canada. Approval does not refer to the technical content of the standard; this remains the continuing responsibility of the accredited standards-development organization. Those who have a need to apply standards are
8、encouraged to use National Standards of Canada whenever practicable. These standards are subject to periodic review; therefore, users are cautioned to obtain the latest edition from the organization preparing the standard. La responsabilit dapprouver les Normes nationales du Canada incombe au The re
9、sponsibililyfor approving National Standards of Canada rests with the Conseil canadien des normes Standards Council of Canada 45, rue OConnor, Bureau 1200 45 OConnor Street, Suite 1200 Ottawa, Ontario, K1P 6N7 Canada Les normes nationales du Canada sont publies en versions franaise et anglaise. Nati
10、onal Standards of Canada are published in English and French. Bien quele butpremier visparcette normesoit nonc sous so wbrique Domaine dippIication, ilestimportant de retenirqulIincombe a Iutilisateurdejugersila nomie convient a ses besoins particuliers. Although the intendedprimaryapplication ofthi
11、s Staridardis statedin its Scope, it is important to note that it remains the respansibility ofthe users tojudge its suftability for their partiailar purpose. General Instruction No. 1CAN/CSA-C50068-99April 1999Title: Wrought steel enclosures for gas-filled high-voltage switchgear and controlgearPag
12、ination: 56 pages (CSA/1CSA/2 and 54 text), each dated April 1999To register for e-mail notification about any updates to this publicationgo on-line to shop.csa.caclick on E-mail Services under MY ACCOUNTclick on CSA Standards Update ServiceThe List ID that you will need to register for updates to t
13、his publication is 2007618.If you require assistance, please e-mail techsupportcsa.ca or call 416-747-2233.Visit CSAs policy on privacy at csagroup.org/legal to find out how we protect your personal information.Blank pageWrought steel enclosures for gas-filled CAN/CSA-CS0068-99 high-voltage switchge
14、ar and controlgear CAN/GSA -C50068-99 Wrought steel enclosures for gas- filled high-voltage switchgear and con tro Igear CSA Preface This is the first edition of CSA Standard CAN/CSA-C50068, Wrought steel enclosures for gas-filled high-voltage switchgear and controlgear, which is an adoption, with C
15、anadian deviations, of the identically titled CENELEC (European Committee for Electrotechnical Standardization) Standard EN 50 068 : 1 991 (1 991 -02) including Amendment Al :1 993. CSA Standards are developed through the dedication of time by Committee members and by financial support through sales
16、 of Standards and through voluntary contributions. Major funding in support of the consensus process for this Standard was provided by the Canadian Electricity Association (CEA), whose assistance is acknowledged with thanks. This Standard was reviewed for Canadian adoption by the CSA Technical Commi
17、ttee on Switchgear and Controlgear under the jurisdiction of the Standards Steering Committee on Electrical Engineering and has been formally approved by the Technical Committee. A list of the members of these Committees is available upon request. This Standard has been approved as a National Standa
18、rd of Canada by the Standards Council of Canada. April 1999 Canadian Standards Association 1999 All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. CENELEC material is reprinted with permIssion. Inquiries regarding
19、this National Standard of Canada should be addressed to Canadian Standards Association, 178 Rexdale Boulevard, Etobicoke, Ontario, Canada, M9W 1R3. April1999 CSA/1 Wrought steel enclosures for gas-filled CAN/CSA-C50068-99 high-voltage switchgear and controlgear Canadian Deviations Clause 2.1 Type of
20、 equipment Delete the first paragraph and replace with the following This Standard applies to fusion welded wrought steel enclosures pressurized with dry air, inert gases, eg, sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a mixture of such gases, used in indoor or outdoor installations
21、of high-voltage switchgear and controlgear, where the gas is used principally for its dielectric and/or arc-quenching properties, with rated voltages (a) 1 kV and up to and including 52kV and with gas-filled compartments with design pressure greater than 3 bar (gauge); and (b) 72.5 kV and above. Cla
22、use 2.3 Quality assurance Delete the note and replace with the following Note: The manufacturer should have a quality assurance program registered to the applicable ISO 9000 series standards. Clause 5.5 Design Temperature Add the following paragraphs Material shall be tested in accordance with ASTM
23、E 23, Charpy v notch, to ensure that its brittle ductile transition temperature is not higher than the specified minimum ambient temperature. The parent metal, qualified weld procedures, and production welds shall be tested in accordance with ASTM E 23, Charpy v notch, to ensure that its brittle duc
24、tile transition temperature is not higher than the specified minimum ambient temperature. Clause 8.1 General conditions Delete the first paragraph and replace with the following Unless otherwise determined by test or analysis, enclosures within the scope of this Standard shall be provided with prote
25、ctive devices which may be one of the following: (a) bursting discs; (b) self-closing valves; or (c) non-self-closing devices. CSA/2 April 1999 EUROPEAN STANDARD EN 50 068 NORME EUROPEENNE EUROPAISCHE NORM February 1991 UDC 621.316.54-213.34-034.14 Descriptors: Enclosure, high-voltage switching devi
26、ce, H.V. metal enclosed switchgear and controlgeaz pressurized closure, wrought steel English version Wrought steel enclosures for gas-filled highvoltage switchgear and controlgear Enveloppes en acier soud pour lappareillage Kapselungen aus Schmiedestahl fr a haute tension sous pression de gaz gasge
27、fllte Hochspannungs- Schaltgerte und -Schaltanlagen This European Standard was approved by CENELEC on 5 March 1990. . CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard witho
28、ut any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other languag
29、e made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece,
30、Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Norinalisation Electrotechnique Europaisches Komitee fr Elektrotechnische Normung Central Secretariat: ru
31、e de Stassart 35, B-1050 Brussels 1991 Copyright reserved to CENELEC members Ref. No. EN 50 068: 1991 E Page 2 EN 50068: 1991 Foreword At the request of CENELEC Technical Committee TC 17C, the text of the draft EN 50 068 prepared by It 17C was submitted to the Unique Acceptance Procedure (UAP). The
32、text of the draft was approved by CENELEC as EN 50 068 on 5 March 1990. The following dates were fixed: - latest date of (dop) 1991-06-01 publication of an identical national standard - latest date of (dow) 1991-06-01 withdrawal of conflicting national standards For products which have complied with
33、 the relevant national standard before 1991-06-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until 1996-06-01. - iS document forms a supplement to EN 50 052 (1986) : Cast aluminium alloy enclosures for gas-filled high-voltage
34、 switchgear and controlgear“ and EN 50 064 (1989) : “Wrought aluminium and aluminium alloy enclosures for gas-filled hi:th-voltage switchgear and controlgear“, cc. icerning welded enclosures for the same type of sv itchgear and controlgear but composed of parts made of wrought steel. It is based on
35、the general specifications given in HD 358 S2 (IEC 517 (1986) e 2) which are however not sufficient to satisfy ti - conditions for the service allowance of pressurized high-voltage switchgear and controlgear.) These specifications are appropriate for pressurized switchgear enclosures allowing an eco
36、nomic production without sacrificing aspects of safety. For unusual shapes dictated by electrical conditions they permit the verification of sound design by proof tests instead of calculations. Nevertheless this European Standard makes use of many internationally well acknowledged calculation rules
37、and the Technical Committee will in addition pursue the progress in standardization in CEN/it 121 and ISO/IC 44 on welding and allied processes. For the time being reference can only be made to published international standards as far as they are appropriate for the purpose of production of enclosur
38、es to be used in gas-filled switchgear and controlgear. The present EN has been established as an international specification for the design, construction, testing, inspection and certification of pressurized enclosures used in high-voltage switchgear and controlgear. This standard follows to that e
39、xtent also Article 2 of the Directive 76/767/EEC. The European Standard contains two normative and one informative technical annexes: Annex A : Welding procedure and welder performance tests. Annex B : Sample of record form. Annex C : National deviations. List of standards referred to in this standa
40、rd: Gas-insulated metal-enclosed switchgear for rated voltages of 72,5 kVand above. ISO 6213 : 1983 Welding : Items to be considered to ensure quality in welding structures. Guidelines for selection and use of the standards on quality management, quality system elements and quality assurance. Genera
41、l terms and their definitions concerning standardization and related activities. ISO 6520 : 1982 Classification of imperfections in metallic fusion welds, with explanations. ISO/R 373 : 1964 General principles for fatigue testing of metals. Contents 1 Introduction 3 Scope and field of application De
42、finitions Materials 4 5 Design 6 Manufacture and workmanship 7 Inspection and testing 8 Pressure relief devices 9 Certification and marking Annexes A Welding procedure and welder performance tests 39 B Sample of record form 47 C National deviations 49 HD 358 S2 (IEC 517 (1986) ed 2) ISO 9u00: 1987 I
43、SO/IEC Guide 2: 1986 2 3 4 3 3 4 27 31 38 38 Page 3 EN50068: 1991 1 Introduction This standard covers the requirements for the design, construction, testing, inspection and certification of gas-filled enclosures for use specifically in high-voltage switchgear and controlgear or for associated gas-fi
44、lled equipment. Special consideration is given to these enclosures for the following reasons. a) The enclosures usually form the containment of electrical equipment, thus their shape is determined by electrical rather than mechanical considerations. b) The enclosures are installed in restricted acce
45、ss areas and the equipment is operated by experts and instructed persons only. c) As the thorough drying ofthe inert, non- corrosive gas-filling medium is fundamental to the satisfactory operation of the electrical equipment it is periodically checked. For this reason, no internal corrosion allowanc
46、e is required on the wall thickness of these enclosures. d) The enclosures are subjected to only small fluctuations of pressure as the gas-filling density shall be maintained within close limits to ensure satisfactory insulating and arc-quenching properties. Therefore, the enclosures are not liable
47、to fatigue due to pressure cycling. e) The operating pressure is relatively low. For the foregoing reasons, and to ensure the minimum disturbance hence reducing the risk of moisture and dust entering the enclosures which would prevent correct electrical operation of the switchgear, no pressure tests
48、 shall be carried out after installation and before placing in service and no periodic inspection of the enclosure interiors or pressure tests shall be carried out after the equipment is placed in service. 2 Scope and field of application 2.1 Type of equipment This standard applies to fusion welded
49、wrought steel enclosures pressurized with dry air, inert gases, for example sulphur hexafluoride or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high-voltage switchgear and controlgear with rated voltages 72,5 kV and above, where the gas is used principally for its dielectric andlor arc-quenching properties. The enclosures comprise parts of electrical equipment not necessarily limited to the following examples: Circuit-breakers Switch-disconnectors Disconnectors Earthing switches Current transformer
