EN 50089-1992 en Cast Resin Partitions for Metal Enclosed Gas-Filled High Voltage Switchgear and Controlgear《金属外壳充气高压开关和控制设备用铸造树脂隔板》.pdf

1、CENELEC Rue Um Stmsurt 35 - B 1050 BruxeIIea nt.: (+ 32 2) si.ee.71 - FIX: (+ 32 2) sie.e9.ie TdOtOX 206 2210007 0 CENCEL - TX 172210097 m 3404583 003b970 3 m INFORHATION SHEET EN 50089 I Issue i 1992-05-08 I May 1992 Cast resin partitions for metal enclosed gas-filled high voltage switchgear and co

2、ntrolgear Cloisons en rsine moule pour lappareillage sous enveloppe mtallique d haute tension sous pression de gaz Giessharz-Zwitchenwande fr metallgekapselte gasgefllte Hochspannungs-Schaltgerate und -Schaltanlagen Related to Directive: 76/767/EEC This European Standard consists of the following: -

3、 Title Page - Text prepared by CENELEC technical comnittee TC 17C date of ratification : 1992-03-24 date of announcement ; 1992-09-01 date of withdrawal : 1993-03-01 date of latest publication : 1993-03-01 LIST OF NATIONAL STANOAROS IS GIVEN OVERLEAF HARMONIZED NATIONAL STANDARDS AT : BE: CH : DE :

4、DK : ES : FI : FR : GE : GR : I : IS : IT : LU : NL : NO : PT : SE : IBI 3409583 0036773 5 W EN 50089:1992 NOS No standard SP Standard in preparation NR Standard under revision 3404583 0036972 7 0 EUROPEAN STANDARD EN 50089 NORME EUROPEENNE EUROPISCHE NORM May 1992 UM: 621.315.626:621.316.37-213.3-0

5、34:620.1 Descriptors: Enclosure, high-voltage switching device, H. V. metal- enclosed switchgear and controlgear, pressurized enclo- sure, cast resin partitions ENGLISH VERSION Cast resin partitions for metal enclosed gas-filled high voltage switchgear and controlgear Cloisons en resine moule pour G

6、iessharz-Zwischenwnde fur lappareillage sous enveloppe metallgekapselte gasgefllte mtallique haute tension sous Hochspannungs-Schaltgerte pression de gaz und -Schaltanlagen This European Standard was approved by CENELEC on 24th March 1992. CENELEC members are bound to comply with the requirements of

7、 the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Euro- pean Standard the status of a national standard without any alteration. Up-to-date list and bibliographical references concerning such national standards may be obtained on application to the Central Secretari

8、at 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 the Central Secretariat has the same status as the o

9、fficial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemborg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechn

10、ical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels Cj 1992 Copyright reserved to CENELEC members Ref. No. EN 50089:1992 E 3404583 0036973 9 S Page 2 EN 50089:1992 FOREWORD This

11、 European Standard has been prepared by CENELEC Technical Committee TC17C: High-voltage enclosed switchgear and controlgear. It was approved by CENELEC on 24th March 1992. The following dates are applicable: - latest date of publication of an identical - latest date of withdrawal of conflicting nati

12、onal standard (dop) 1993-03-01 national standards (dow) 1993-03-01 The document forms a supplement to EN 50052:1986, Cast aluminium alloy enclosures for gas-filled high-voltage EN 50064:1989, Wrought aluminium and aluminium alloy enclosures for gas- EN 50068:1990, Wrought steel enclosures for gas-fi

13、lled high-voltage EN 50069:1990, Welded composite enclosures sf cast and wrought. aluminium switchgear and controlgear, filled hiqh-voltage switchgear and controlgear, switchgear and controlgear and alloys for gas-filled high-voltage switchgear and controlgear. The specifications are appropriate for

14、 pressurized switchgear enclosures allowing an economic production without sacrificing aspects of safety. For unusual shapes dictated by electrical conditions they permit the verifica- tion of sound design by proof tests instead of calculations. The present EN has been established as an internationa

15、l specification for the design, construction, testing, inspection and certification of pres- surized enclosures used in high-voltage switchgear and controlgear. This standard follows to that extent also Article 2 of the Directive 76/767/EEC. List of standards referred to in this standard: HD 358 S3:

16、1992 (IEC 517:1990) Gas-insulated metal-enclosed switchgear for rated voltage of 72.5 kV and above. EN 29000:198a Quality management and quality assurance. . S 3404583 0036974 O H Page 3 EN 50089:1992 . .- CAST RESIN PARTITIONS FOR METAL ENCLOSED GAS-FILLED HIGH VOLTAGE SWITCHGEAR AND CONTROLGEAR CO

17、NTENTS Page 1 Introduction 2 Scope 3 Definitions 4 Materials 5 Design 6 Manufacture and workmanship 7 Inspection and testing 8 Certification and marking 3 4 5 5 6 7 9 11 1 In t r oduc t i on This standard covers the strength requirements for the mechanical aspects of design, manufacture, testing, in

18、spection, certification and marking of cast resin partitions which are pressurized for use specifically in metal enclosed gas filled High Voltage Switchgear and associated equipment. Electrical performance requirements hava no bearing on mechanical strength and are therefore not considered in this s

19、tandard. Special consideration shall be given to these partitions for the following reasons : 1.1 For electrical reasons the partitions must be manufactured in insulat- ing material. This standard deals only with bast resin. 1.2 The enclosures usually form the containment of electrical equipment, th

20、us their shape and therefore the shape of the partitions is determined by 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 in- structed persons only. Page 4

21、 EH 50089:1992 1.4 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 enclo- sures and hence the partitions are not liable to fatigue due

22、to pressure cycling . 1.5 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 repetition of pressure tes

23、ts shall be carried out after installation and before placing in service- and no periodic inspection 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 i

24、nert gas- es, for example sulphur hexafluoride or a mixture of gases such as sulphur hexafluoride and nitrogen used in indoor or outdoor installations of high- its dielectric and/or arc-quenching properties, with rated voltages . voltage switchgear and controlgear, where the gas is used principally

25、for - 1 kV and up to and including 52 kV and with gas-filled compartments -. . and with rated voltage 72,5 kV and above. with design pressure greater than 3 bar (gauge) The partitions comprise pressurized barriers in electrical equipment not necessarily limited to the following examples: circuit bre

26、akers, 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 (see HD 358 Sa (IEC 517). 2.2 Quality assurance It is the intention of this st

27、andard that the switchgear manufacturer shall be responsible for achieving and maintaining a consistent and adequate quality of product. c8 3404583 003b97b 4 E Page 5 EN 50089: 1992 Sufficient examinations shall be mads by the partition manufacturer to en- sure that the materials, production and tes

28、ting comply in all respects with the requirements of this standard. Inspections by the users inspec- tors 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.

29、NOTE : Reference should be made to the EN 29000 series of standards for Quality Assurance System. 3 Definitions Design pressure Since in service most partitions have the same or small differential pres- sure on either side, the significant pressure is that termed the mainte- nance pressure, this wil

30、l 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 however, where the partition is pressurized on one side and atmospheric pressure exists at all times on the other side. In both cases the pressure t

31、u be considered on the pressurized side of the partition is the pressure at maximum ambient temperature with solar radia- tion effects (where applicable) and rated continuous current (where appli- cable). In both cases the pressure so derived is the design pressure. The manufacturer may if he so wis

32、hes 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 pressure is the design pressure. 4 Ma ter ials Any suitable cast resin system, liquid or solid and any suitable filler, e. 9. alumina or b

33、auxite, may be used provided the requirements of this standard are met. The partitions shall be traceable to a given batch of material and manu- facturing process either by serial numbet, batch number or date, (Refer to clause 8). Page 6 EH 50089: 1992 5 Design 5.1 Purpose Consideration for design o

34、f partitions for gas insulated switchgear pre- scribed in this section takes into account that the partitions are subjec- ted to particular operating conditions (clause 1) which distinguish them from parts for compressed air receivers and similar storage vessels. 5.2 Considerations for design When d

35、esigning 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 side of the partition with normal operating pressure on the other, as part of the filling process , (i

36、ii) 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 partitions the worst case pressure direc- tion, (VI superimposed loads and vibration, (vi) the poss

37、ibility 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 as defined in subclause 3.1 provided the requirements of clause 7 are met. NOTE : Pressure

38、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 internal fault, the requirement of Pub- lication HD 358 S3 (IEC 517) shall be applied.

39、W 3404583 003b978 8 W Page 7 EN 50089:1992 6 Manufacture and workmanship 6.1 Consultation between switchgear manufacturer fi partition manufacturer It is strongly recommended, especially when the switchgear manufacturer and the partition manufacturer are not the same, that the switchgear manu- factu

40、rer, having defined the necessary geometry and thickness of the par- tition, 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 technique The manufacturing techniq

41、ue shall be recorded by the partition manufac- turer for each design o partition giving full details of method of pour- ing mould material, attitude of mould, temperature of moulds, curing pro- cedure etc. 6.2.1 All subsequent production partitions shall be made by the same technique and under the s

42、ame 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 with clause 7 of this standard. Production shall only proceed in the event of a success- ful type test. 6.2.3 If for an

43、y reason the manufacturer is changed, a new type test in accordance with Clause 7 of this standard shall be carried out on the partition. Production shall only take place after successful completion of the type test. 6.3 Geometry and dimensions 6.3.1 The geometry and dimensions of the partition shal

44、l be defined by the switchgear manufacturers drawings, when the mould is made by the parti- tion manufacturer or the mould, when this is supplied by the switchgear manufacturer or the accepted sample partition, when serial production methods are em- ployed. E 3404583 0036979 T Page 8 EN 50089:1992 6

45、.3.2 Tolerances on dimensions shall be agreed between the switchgear manufacturer and the partition manufacturer and recorded on approved drawings. 6.3.3.The partition shall be capable of being machined, when required, to the finished dimensions without leaving evidence of the cast surface in the ma

46、chined area. Drawings shall indicate the datum points to be used for machining or jigging. 6.4 Mechanical properties In order to provide a control on the quality a normal production, samples shall be taken from each batch of production partitions. 6.4.1 As a control check on the mechanical propertie

47、s separately cast test bars shall be made from each batch and be representative of the material and process used to manufacture the partitions in the batch. The properties to be checked shall include heat distortion temperatures (IS0 R75), tensile strength (IS0 527), impact strength (ASTM D256), den

48、s i ty. NOTE 1: Othec equally effective methods may be used provided they can be j us ti f ied . NOTE 2: For the purposes of this sub-clause it is recommended that a batch of material is defined as each separate mix or where the mix is continuous each 500 kg of mix or each weeks produc- tion whichev

49、er is the lower. 6.4.2 The mechanical properties of the test bars representing each batch of partitions shall meet the requirements of the specifications for the resin system. If the test bars do not meet the requirements of the resin system specification the whole batch they represent shall be rejected. 6.5 Metallic inserts Before use any metallic inserts shall be degreased and inspected to ensure that they are free of defects. W 3404583 0036980 b = Page 9 EN 50089:1992 6.6 Surface finish The partitions shall be suitably cleaned. Runners, risers, dead heads, fiash