1、BRITISH STANDARD BSEN 50089:1992 Incorporating Amendment No.1 Specification for Cast resin partitions formetal-enclosed gas-filled high-voltage switchgear and controlgear The European Standard EN50089:1992 has the status of a British Standard UDC621.315.626:621.316.37-213.3-034:620.1BSEN50089:1992 T
2、his British Standard, having been prepared under the directionof the Power Electrical Engineering Standards Policy Committee, was published underthe authority of the Standards Board and comes into effect on 15 September1992 BSI 09-1999 The following BSI references relate to the work on this standard
3、: Committee reference PEL/92 Draft for comment90/22378 DC ISBN0 580 21061 8 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: Aust
4、ria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland UnitedKingdom Amendments issued since publication Amd. No. Date Comments 8239 July 1994 Indicated by a sideline in the marginBSEN50089:1992 BSI 09-1999 i Contents P
5、age Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 50089 5 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN50089:1992 ii BSI 09-1999 National foreword This British
6、Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee and is the English language version ofEN50089:1992 and its amendmentA1:1994 Cast resin partitions for metal-enclosed gas-filled high-voltage switchgear and controlgear published by the Europ
7、ean Committee for Electrotechnical Standardization (CENELEC). A British Standard does not purport to include all the necessary 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 fro
8、m legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 8, 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 indica
9、ted in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN50089 May1992 + A1 February 1994 UDC621.315.626:621.316.37-213.3-034:620.1 Descriptors: Enclosure, high-voltage switching device, H.V.metal-enclosed switchgear and controlgear, pressurized enclos
10、ure, cast resin partitions English version Cast resin partitions for metal-enclosed gas-filled high-voltage switchgear and controlgear (includes amendment A1:1994) Cloisons en rsine moule pour lappareillage sous enveloppe mtallique haute tension sous pression de gaz (inclut lamendement A1:1994) Gies
11、sharz-Zwischenwnde fr metallgekapselte gasgefllte Hochspannungs-Schaltgerte und -Schaltanlagen (enthlt nderungen A1:1994) This European Standardwas approved by CENELEC on24th March 1992. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
12、giving this European Standard the status of a national standard without 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 offici
13、al 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 the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical commit
14、tees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europ
15、isches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1992 Copyright reserved to CENELEC members Ref. No.EN50089:1992 + A1:1994 EEN50089:1992 BSI 09-1999 2 Foreword This European Standard has been prepared by CENELEC Technical Committee TC17C: High-volt
16、age enclosed switchgear and controlgear. It was approved by CENELEC on 24th March 1992. The following dates are applicable: The document forms a supplement to EN 50052:1986, Cast aluminium alloy enclosures for gas-filled high-voltage switchgear and controlgear. EN 50064:1989, Wrought aluminium and a
17、luminium alloy enclosures for gas-filled high-voltage switchgear and controlgear. EN 50068:1990, Wrought steel enclosures for gas-filled high-voltage switchgear and controlgear and. EN 50069:1990, Welded composite enclosures of cast and wrought aluminium alloys for gas-filled high-voltage switchgear
18、 and controlgear. The specifications are appropriate for pressurized switchgear enclosures allowing an economic 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.
19、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 extent also Article 2 of the Directive 76/767/EEC. List
20、of standards referred to in this standard: Foreword to amendment A1 This amendment toEN50089:1992 was prepared jointly by the CENELEC Technical Committees TC17C, High-voltage enclosed switchgear and controlgear, andTC20, Electric cables. The text was submitted to the CENELEC members for formal vote
21、in April1993 and was approved by CENELEC as amendmentA1 toEN50089:1992 on1993-12-08. The following dates were fixed: Text of the amendment Clause2 Scope Add the following subclause: “2.3 Responsibilities for the supply of the cable connections Where the cable connections are supplied by the cable ma
22、nufacturer the responsibility for ensuring that the connections comply in all respects with this standard rests with the cable manufacturer. Where the cable connections are supplied by the switchgear manufacturer the responsibility for ensuring that the connections comply in all respects with this s
23、tandard rests with the switchgear manufacturer. Where the cable connections are not supplied by the cable manufacturer or the switchgear manufacturer, the responsibility for ensuring that the connections comply in all respects with this standard rests with the cable accessory supplier.” latest date
24、of publication of an identical national standard (dop) 1993-03-01 latest date of withdrawal of conflicting national standards (dow) 1993-03-01 HD 358 S3:1992 (IEC 517:1990) Gas-insulated metal-enclosed switchgear for rated voltage of72.5 kV and above. EN 29000:1988 Quality management and quality ass
25、urance. latest date of publication of an identical national standard (dop) 1994-10-01 latest date of withdrawal of conflicting national standards (dow) 1994-10-01EN50089:1992 BSI 09-1999 3 Contents Page Foreword 2 1 Introduction 5 2 Scope 5 3 Definitions 6 4 Materials 6 5 Design 6 6 Manufacture and
26、workmanship 6 7 Inspection and testing 7 8 Certification and marking 84 blankEN50089:1992 BSI 09-1999 5 1 Introduction This standard covers the strength requirements for the mechanical aspects of design, manufacture, testing, inspection, certification and marking of cast resin partitions which are p
27、ressurized for use specifically in metal-enclosed gas-filled high-voltage switchgear and associated equipment. Electrical performance requirements have no bearing on mechanical strength and are therefore not considered in this standard. Special consideration shall be given to these partitions for th
28、e following reasons: 1.1 For electrical reasons the partitions shall be manufactured in insulating material. This standard deals only with cast resin. 1.2 The enclosures usually form the containment of electrical equipment, thus their shape and therefore the shape of the partitions is determined by
29、electrical as well as mechanical considerations. 1.3 The enclosures in which the partitions are integrated are installed in restricted access areas and the equipment is operated by skilled and instructed persons only. 1.4 The enclosures are subjected to only small fluctuations of pressure as the gas
30、-filling density shall be maintained within close limits to ensure satisfactory insulating and arc-quenching properties. Therefore the enclosures and hence the partitions are not liable to fatigue due to pressure cycling. 1.5 The operating pressure is relatively low. For the foregoing reasons, and t
31、o 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 repetition of pressure tests shall be carried out after installation and before placing in service and no periodic inspection
32、of enclosure interiors or pressure tests shall be carried out after the equipment is placed in service. 2 Scope 2.1 Type of equipment This standard applies to cast resin partitions pressurized with inert gases, for example sulfur hexafluoride or a mixture of gases such as sulfur hexafluoride and nit
33、rogen 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 The partitions comprise pressurized barriers in electrical equipment not necessarily limited to the foll
34、owing examples: circuit breakers, switch disconnectors, disconnectors, earthing switches, current transformers, voltage transformers, surge arrestors, busbars and connections, cable connections. This standard does not apply to high-voltage bushings seeHD358S3 (IEC517). 2.2 Quality assurance It is th
35、e 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 partition manufacturer to ensure that the materials, production and testing comply in all respec
36、ts with the requirements of this standard. Inspections by the users inspectors shall not absolve the switchgear manufacturer from his responsibility to exercise such quality assurance procedures as to ensure that the requirements and intent of this standard are satisfied. NOTEReference should be mad
37、e to theEN29000 series of standards for quality assurance systems. 1kV and up to and including52kV and with gas-filled compartments with design pressure greater than3bar (gauge) and with rated voltage72,5kV and above.EN50089:1992 6 BSI 09-1999 3 Definitions 3.1 design pressure since in service most
38、partitions have the same or small differential pressure on either side, the significant pressure is that termed the maintenance pressure, this will exist when the partition is pressurized on one side and maintenance is being carried out on the other side at atmospheric pressure there are designs how
39、ever, where the partition is pressurized on one side and atmospheric pressure exists at all times on the other side in both cases the pressure to be considered on the pressurized side of the partition is the pressure at maximum ambient temperature with solar radiation effects (where applicable) and
40、rated continuous current (where applicable) in both cases the pressure so derived is the design pressure the manufacturer may if he so wishes prescribe that the pressure on the pressurized side of the partition be lowered to a specified and controlled pressure during maintenance, in such cases this
41、pressure is the design pressure 4 Materials Any suitable cast resin system, liquid or solid and any suitable filler, e.g.alumina or bauxite, may be used provided the requirements of this standard are met. The partitions shall be traceable to a given batch of material and manufacturing process either
42、 by serial number, batch number or date. (Refer toclause8.) 5 Design 5.1 Purpose Consideration for design of partitions for gas insulated switchgear prescribed in this section takes into account that the partitions are subjected to particular operating conditions(clause1) which distinguish them from
43、 parts for compressed air receivers and similar storage vessels. 5.2 Considerations for design When designing a partition, account shall be taken of the following, if applicable i) the full differential pressure across the partition during normal operation, ii) evacuation of the enclosure on one sid
44、e of the partition with normal operating pressure on the other, as part of the filling process, iii) a controlled enhanced pressure on one side of the partition with normal operating pressure on the other during electrical testing of the equipment and associated circuits, iv) for non-symmetrical par
45、titions the worst case pressure direction, v) superimposed loads and vibration, vi) the possibility of maintenance being carried out adjacent to a pressurized partition. 5.3 Stresses due to pressure The dimension of a partition under pressure may be determined by any method using the design pressure
46、 as defined insubclause3.1 provided the requirements ofclause7 are met. NOTEPressure stresses due to an internal fault are not considered in the design of partition since after such an occurrence the partition would be carefully checked and, if necessary, replaced. In the case of arcing due to an in
47、ternal fault, the requirement of PublicationHD358S3 (IEC517) shall be applied. 6 Manufacture and workmanship 6.1 Consultation between switchgear manufacturer and partition manufacturer It is strongly recommended, especially when the switchgear manufacturer and the partition manufacturer are not the
48、same, that the switchgear manufacturer, having defined the necessary geometry and thickness of the partition, shall obtain the partition manufacturers agreement to the design prior to casting to enable sound partitions to be produced consistently, having the required properties. 6.2 Manufacturing te
49、chnique The manufacturing technique shall be recorded by the partition manufacturer for each design of partition giving full details of method of pouring mould material, attitude of mould, temperature of moulds, curing procedure etc. 6.2.1 All subsequent production partitions shall be made by the same technique and under the same conditions without significant deviations. 6.2.2 Where the technique, material or material supplier is altered, the partition so manufactured shall be type tested in accordance withclause7 of this standard. Production
