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1、BRITISH STANDARD BS EN 50069:1991 Incorporating Amendment No. 1 Specification for Welded composite enclosures of cast and wrought aluminium alloys for gas-filled high-voltage switchgear and controlgear This European Standard EN 50069:1991 has the status of a British Standard Licensed Copy: sheffield
2、un sheffieldun, na, Mon Nov 06 07:15:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50069:1991 This British Standard was published under the authority of the Standards Board and comes into effect on 28 June 1991 BSI 01-2000 The following BSI references relate to the work on this standard: Commi
3、ttee reference PEL/92 Announced in BSI News, December 1988 ISBN 0 580 19612 7 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the National Committees of the following countries. Au
4、stria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxemburg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Amendments issued since publication Amd. No.DateComments 8055December 1993 Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffiel
5、dun, na, Mon Nov 06 07:15:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50069:1991 BSI 01-2000i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 500695 National appendix NAInside back cover National appendix NBInside back cover Licensed Copy: s
6、heffieldun sheffieldun, na, Mon Nov 06 07:15:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50069:1991 ii BSI 01-2000 National foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee and is the English language version
7、of EN 50069:1991 and its Amendment A1:1993 “Welded composite enclosures of cast and wrought aluminium alloys for gas-filled high-voltage switchgear and controlgear” published by the European Committee for Electrotechnical Standardization (CENELEC). National appendix NA gives the constitution of the
8、committees responsible for UK participation in the preparation of this standard. National appendix NB gives details of International Standards quoted in this standard for which there is an identical or technically equivalent British Standard. A British Standard does not purport to include all the ne
9、cessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the
10、 EN title page, pages 2 to 14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:15:30
11、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50069 February 1991 + A1 August 1993 UDC 621.316.37-213.6-034.715 Descriptors: Enclosure, high-voltage switching device, H.V. metal-enclosed switchgear and controlgear, pressurized enclosure, welded cast
12、 and wrought aluminium alloy parts English version Welded composite enclosures of cast and wrought aluminium alloys for gas-filled high-voltage switchgear and controlgear (includes amendment A1:1993) Enveloppes soudes en alliage daluminium comportant des parties moules et des parties en mtal corroy
13、pour lappareillage haute tension sous pression de gaz (inclut lamendement A1:1993) Geschweite Kapselungen von Teil aus Leichtmetallgu und Aluminium-Knetlegierungen fr gasgefllte Hochspannungs-Schaltgerte und- Schaltanlagen (enthlt nderungen A1:1993) This European Standard was approved by CENELEC on
14、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 without any alteration. Up-to-date lists and bibliographical references concerning such national standards ma
15、y 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 language made by translation under the responsibility of a CENELEC member into its own language and notified to
16、 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Unite
17、d Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN 50069:1991 + A1:
18、1993 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:15:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50069:1991 BSI 01-2000 2 Foreword At the request of CENELEC technical committee TC 17C, the text of the draft EN 50069 prepared by TC 17C was submitted to the Unique Acceptance Proced
19、ure(UAP). The text of the draft was approved by all CENELEC members with the exception of Austria and Sweden as EN 50069 on 5 March 1990. The following dates were fixed: For products which have complied with the relevant national standard before 1991-06-01, as shown by the manufacture or by a certif
20、ication body, this previous standard may continue to apply for production until 1996-06-01. This document forms a supplement to EN 50052:1986: “Cast aluminium alloy enclosures for gas-filled high-voltage switchgear and controlgear” and EN 50064:1989: “Wrought aluminium and aluminium alloy enclosures
21、 for gas-filled high-voltage switchgear and controlgear”, concerning welded enclosures for the same type of switchgear and controlgear but composed of parts made of cast and wrought aluminium alloys. It is based on the general specifications given in HD 358 S2 (IEC 517:1986 ed 2) which are however n
22、ot sufficient to satisfy the conditions for the service allowance of pressurized high-voltage switchgear and controlgear. These specifications are appropriate for pressurized switchgear enclosures allowing an economic production without sacrificing aspects of safety. For unusual shapes dictated by e
23、lectrical 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 and the Technical Committee will in addition pursue the progress in standardization in C
24、EN/TC 121 and ISO/TC 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 enclosures to be used in gas-filled switchgear and controlgear. The present EN has been establis
25、hed 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 extent also Article 2 of the Directive 76/767/EEC. The European Standard contains one inf
26、ormative annex: “National Deviations”. List of standards referred to in this standard: Foreword to Amendment A1 This amendment was prepared by CENELEC Technical Committee TC17C, High-voltage enclosed switchgear and controlgear. The text of the draft was submitted to the voting procedure in March 199
27、3 and was approved by CENELEC as amendment A1 to EN 50069:1991 on July 6, 1993. The following dates were accepted: latest date of publication of an identical national standard(dop) 1991-06-01 latest date of withdrawal of conflicting national standards(dow) 1991-06-01 HD 358 S2 (IEC 517:1986 ed 2) Ga
28、s-insulated metal-enclosed switchgear for rated voltages of 72,5 kV and above ISO 6213:1983Welding; Items to be considered to ensure quality in welding structures ISO 9000:1987Guidelines for selection and use of the standards on quality management, quality system elements and quality assurance ISO/I
29、EC Guide 2:1986 General terms and their definitions concerning standardization and related activities ISO 6520:1982Classification of imperfections in metallic fusion welds, with explanations ISO 3134:1985Light metals and their alloys; Terms and definitions latest date of publication of an identical
30、national standard(dop) 1994-10-01 latest date of withdrawal of conflicting national standards(dow) 1993-10-01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:15:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50069:1991 BSI 01-20003 Contents Page Foreword2 1Introduction5 2Scope and field
31、of application5 3Definitions5 4Materials7 5Design7 6Manufacture and workmanship9 7Inspection and testing9 8Pressure relief devices12 9Certification and marking12 Annex A (informative) National deviations14 Table 1 List of recommended cast aluminium alloys8 Table 2 Examples of materials9 Licensed Cop
32、y: sheffieldun sheffieldun, na, Mon Nov 06 07:15:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:15:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50069:1991 BSI 01-20005 1 Introduction This standard covers the requirements for the de
33、sign, construction, testing, inspection and certification of gas-filled enclosures for use specifically in high-voltage switchgear and controlgear, or for associated gas-filled equipment. Special consideration is given to these enclosures for the following reasons: a) The enclosures usually form the
34、 containment of electrical equipment, thus their shape is determined by electrical rather than mechanical considerations. b) The enclosures are installed in restricted access areas and the equipment is operated by experts and instructed persons only. c) As the thorough drying of the inert, non-corro
35、sive gas-filling medium is fundamental to the satisfactory operation of the electrical equipment it is periodically checked. For this reason, no internal corrosion allowance is required on the wall thickness of these enclosures. d) The enclosures are subjected to only small fluctuations of pressure
36、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 to fatigue due to pressure cycling. e) The operating pressure is relatively low. For the foregoing reasons, and to ensure the mi
37、nimum disturbance hence reducing the risk of moisture and dust entering the enclosures which would prevent correct electrical operation of the switchgear, no pressure tests shall be carried out after installation and before placing in service and no periodic inspection of the enclosure interiors or
38、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 welded composite enclosures of cast and wrought aluminium and aluminium alloy enclosures pressurized with dry air, inert gases, for example su
39、lphur hexafluoride or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high-voltage switchgear and controlgear, where the gas is used principally for its dielectric and/or arc-quenching properties, with rated voltages. 1 kV and up to and including 52 kV and with gas-fi
40、lled compartments with design pressure greater than 3 bar (guage); and with rated voltage 72,5 kV and above. The enclosures comprise parts of electrical equipment not necessarily limited to the following examples: circuit-breakers; switch-disconnectors; disconnectors; earthing switches; current tran
41、sformers; voltage transformers; surge arrestors; busbars and connections. The scope covers also pressurized components such as the centre-chamber of live tank switchgear and controlgear, gas-insulated current transformers, etc. 2.2 Production The production of the enclosures shall be in accordance w
42、ith documented welding procedures which shall be carried out by well trained and supervised welding personnel. Where International Standards (ISO or CEN) are not available, National Standards may be used. NOTEThis standard will be revised as soon as possible when ISO or CEN standards covering the va
43、rious aspects are available. 2.3 Quality assurance It is the intention of this standard, that the switchgear manufacturer shall be responsible for achieving and maintaining a consistent and adequate quality of product. Sufficient examinations shall be made by the enclosure manufacturer to ensure tha
44、t the materials, production and testing comply in all respects with the requirements of this standard and ISO 6213:1983. Inspection by the users inspectors shall not absolve the switchgear manufacturer from his responsibility to exercise such quality assurance procedures as to ensure that the requir
45、ements and the intent of this standard are satisfied. NOTEReference should be made to the ISO 9000 series of standards for quality assurance systems. 3 Definitions 3.1 national standard a technical specification established by general agreement with the important part of the concerned interests, app
46、roved by a recognized national standards organization and made available to the public (ISO/IEC Guide 2:1986.) Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:15:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50069:1991 6 BSI 01-2000 3.2 enclosure a part of gas-insulated metal-enclosed s
47、witchgear retaining the insulating gas under the prescribed conditions necessary to maintain safely the rated insulation level, protecting the equipment against external influences and providing a high degree of protection to personnel. HD 358 S2 IEC 517 (1989) ed 2 3.3 manufacturer individual or bo
48、dy responsible for designing and producing the enclosure. In this standard this is the switchgear manufacturer 3.4 designer individual or body who determines the shape, dimensions and wall thickness of the enclosure and selects the materials and method of construction and testing 3.5 founder individ
49、ual or body who produces the raw casting 3.6 design pressure (of an enclosure) pressure used to determine the wall thickness of the enclosure. It is at least the upper limit of pressure reached within the enclosure at the design temperature. HD 358 S2 IEC 517 (1989) ed 2 3.7 design temperature (of an enclosure) highest temperature reached by the enclosure which can occur under service conditions. This is generally the upper limit of ambient air temperature increased by the temperature rise due to the flow of rated normal current. HD 35
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