BS EN 60867-1994 Insulating liquids - Specifications for unused liquids based on synthetic aromatic hydrocarbons《绝缘油 合成芳香烃基新鲜油规范》.pdf

1、BRITISH STANDARD BS EN 60867:1994 IEC867:1993 Insulating liquids Specifications for unused liquids based on synthetic aromatic hydrocarbons The European Standard EN60867:1994 has the status of a BritishStandard UDC 621.315.615BS EN 60867:1994 This BritishStandard, having been prepared under the dire

2、ctionof the Cables and Insulation Standards Policy Committee, was published underthe authority of the Standards Boardand comesinto effect on 15June1994 BSI12-1999 The following BSI references relate to the work on this standard: Committee reference CIL/10 Draft for comment92/03949 DC ISBN 0 580 2333

3、6 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: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France P

4、ortugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBSEN 60867:1994 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN60867 3 National annex NA (infor

5、mative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN 60867:1994 ii BSI 12-1999 National foreword This BritishStandard has been prepared under the direction of the Cables and Insulation Standards Policy Committee and is the English la

6、nguage version of EN60867:1994 Insulating liquids Specifications for unused liquids based on synthetic aromatic hydrocarbons, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC867:1993 published by the International Electrotechnical Commissio

7、n (IEC). This BritishStandard supersedes BS6802:1987 which is withdrawn. BS6802:1987 was identical with IEC867:1986. WARNING. This BritishStandard calls for the use of substances and procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitabi

8、lity and does not absolve the user from legal obligations relating to health and safety at any stage. 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 Standar

9、d does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, the EN title page, pages2 to10, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendm

10、ents incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60867 January1994 UDC 621.315.615 Supersedes HD497 S1:1987 Descriptors: Liquid electrical insulating materials, aromatic hydrocarbons, specifications, charac

11、teristics, tests English version Insulating liquids Specifications for unused liquids based on synthetic aromatic hydrocarbons (IEC867:1993) Isolants liquides Spcifications pour liquides neufs base dhydrocarbures aromatiques de synthse (CEI867:1993) Isolierflssigkeiten Bestimmungen fr ungebrauchte I

12、solierflssigkeiten auf Basis synthetischer aromatischer Kohlenwasserstoffe (IEC867:1993) This European Standard was approved by CENELEC on1993-12-08. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta

13、tus 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 official versions (English, French, German)

14、. 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 committees of Austria, Belgium, Denmark, Fi

15、nland, 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 Europisches Komitee fr Elektrotechnische N

16、ormung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN60867:1994EEN 60867:1994 BSI 12-1999 2 Foreword The text of document10(CO)269, as prepared by IEC Technical Committee No.10: Fluids for electrotechnical applications, was submitted t

17、o the IEC-CENELEC parallel vote in October1992. The reference document was approved by CENELEC as EN60867 on8 December1993. This European Standard replaces HD497 S1:1987. The following dates were fixed: For products which have complied with HD497 S1:1987 before1994-12-01, as shown by the manufacture

18、r or by a certification body, this previous standard may continue to apply for production until1999-12-01. Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Ident

19、ification and general delivery requirements 3 5 Sampling 3 6 Test methods 4 7 Precision and interpretation of test results 5 8 Specifications for capacitor and cable alkylbenzenes 5 9 Specifications for capacitor alkyldiphenylethanes 5 10 Specifications for capacitor alkylnaphthalenes 6 11 Specifica

20、tions for capacitor methylpolyarylmethanes 6 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 9 Sheet 1 Specifications for capacitor and cable alkylbenzenes 6 Sheet 2 Specifications for capacitor alkyldiphenyletha

21、nes 7 Sheet 3 Specifications for capacitor alkylnaphthalenes 7 Sheet 4 Specifications for capacitor methylpolyarylmethanes 8 latest date of publication of an identical national standard (dop)1994-12-01 latest date of withdrawal of conflicting national standards (dow)1994-12-01EN 60867:1994 BSI 12-19

22、99 3 1 Scope This International Standard covers specifications and test methods for unused synthetic aromatic hydrocarbons intended for use as insulating liquid in electrical equipment. 2 Normative references The following normative documents contain provisions which, through reference in this text,

23、 constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most rec

24、ent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC156:1963, Method for the determination of the electric strength of insulating oils. IEC247:1978, Measurement of relative permittivity, dielectric dissipat

25、ion factor and d.c. resistivity of insulating liquids. IEC475:1974, Method of sampling liquid dielectrics. IEC628:1985, Gassing of insulating liquids under electrical stress and ionization. IEC814:1985, Determination of water in insulating liquids by automatic coulometric Karl Fischer titration. IEC

26、1039:1990, General classification of insulating liquids. ISO2719:1988, Petroleum products and lubricants Determination of flash point Pensky-Martens closed cup method. ISO3016:1974, Petroleum oils Determination of pour point. ISO3104:1976, Petroleum products Transparent and opaque liquids Determinat

27、ion of kinematic viscosity and calculation of dynamic viscosity. ISO3675:1976, Crude petroleum and liquid petroleum products Laboratory determination of density or relative density Hydrometer method. ISO5662:1978, Petroleum products Electrical insulating oils Detection of corrosive sulphur. 3 Defini

28、tions General remark Gas chromatographic analyses can be useful for composition identification and detection of impurities. For the purposes of this International Standard, the following definitions apply. 3.1 alkylbenzenes insulating liquids consisting of a benzene ring and an alkylgroup. The alkyl

29、 group may be a straight chain or a branched-chain type NOTEThe two types of alkylbenzene can be distinguished by infra-red spectrophotometric analysis. The straight-chain type shows a single absorption peak in the region1360cm 1to1380cm 1and the branched chain type shows a double peak in that regio

30、n. 3.2 alkyldiphenylethanes insulating liquids consisting of diphenylethanes derivatives; normally the two aryl groups carry short alkyl groups NOTEThis type of product is characterized by infrared absorption bands at3070,1606 and705cm 1 . 3.3 alkylnaphthalenes insulating liquids consisting of a nap

31、hthalene structure with substituent aklyl groups NOTEThis type of product is characterized by infrared absorption bands at3070,1605,1380 and1360cm 1 . 3.4 methylpolyarylmethanes insulating liquids consisting of methylpolyarylmethanes derivatives mainly based on a blend of mono/di-benzyl toluene (M/D

32、BT) NOTEThis type of product is characterized by infrared absorption bands at3025,1606and705cm 1 . 4 Identification and general delivery requirements 4.1 The products are normally delivered in road or rail tank wagons or in drums, which shall be specially cleaned for this purpose. 4.2 The drums and

33、sample containers shipped by the supplier shall carry at least the following markings: number of this standard; suppliers designation; type of product. 5 Sampling Sampling shall be carried out in accordance with the procedure described in IEC475.EN 60867:1994 4 BSI 12-1999 6 Test methods 6.1 Appeara

34、nce Appearance shall be evaluated by examining, in transmitted light, a representative sample of the liquid having a thickness of approximately10cm, at ambient temperature. 6.2 Density Any recognized test method may be used. In case of dispute, the method to be used shall be that given in ISO3675. D

35、ensity shall be measured at20 C. 6.3 Kinematic viscosity Kinematic viscosity shall be measured according to ISO3104. 6.4 Flash-point Flash-point shall be determined according to ISO2719. 6.5 Pour-point Pour-point shall be determined according to ISO3016. 6.6 Neutralization value 6.6.1 Reagents a) St

36、andard alcoholic potassium hydroxide (KOH) solution0,1mol/dm 3 . b) Toluene, sulphur-free. c) Azeotropic ethanol (boiling-point78,2 C). d) Standard hydrochloric acid solution (HCl)0,1mol/dm 3 . e) Alkali blue indicator solution:2g of alkali blue6B are dissolved in100cm 3of azeotropic ethanol contain

37、ing1cm 3hydrochloric acid0,1mol/cm 3 . After24h, carry out an acid value test to check whether the indicator has been sufficiently sensitized. The indicator is satisfactory if the colour changes distinctly from blue to a red comparable to that of a10% solution of cobalt nitrate Co(NO 3 ) 2 .6H 2 O.

38、Should sensitization be insufficient, repeat the addition of0,1mol/dm 3hydrochloric acid and check again after24h. Continue until sensitization is satisfactory. Filter and store in a brown glass bottle in the dark. 6.6.2 Procedure Weigh20g of the sample to the nearest0,05g into a250cm 3stoppered con

39、ical flask. To a mixture of60cm 3of toluene and40cm 3of ethanol in a second flask add2cm 3of indicator solution. Neutralize the solution with0,1mol/dm 3KOH solution until a red colour comparable to that of a solution of10% cobalt nitrate Co(NO 3 ) 2 .6H 2 O is obtained and persists for at least15s.

40、Add this solution to the sample, swirl and immediately titrate at a temperature not above25 C with0,1mol/dm 3KOH solution to the above end-point. The neutralization value (NV) is calculated from the expression: 6.7 Chlorine content The method described in this subclause is suitable for obtaining the

41、 total chlorine content in hydrocarbon liquids. However, any other chemical or instrumental method known to produce comparable results could be used. 6.7.1 Reagents Standard solution of nitric acid (HNO 3 ), analytical grade. Dilute190g of concentrated nitric acid to1dm 3with distilled water. Isopro

42、pyl alcohol, analytical grade. Silver nitrate (AgNO 3 ), analytical grade. Standard solution(0,025mol/dm 3 ) Weigh accurately0,4247g of silver nitrate. Transfer it to1litre volumetric flask and add distilled water to dissolve. Add3cm 3of concentrated nitric acid (density1,42kg/dm 3 ) and then add di

43、stilled water to the1dm 3mark of the volumetric flask. Standardize this solution against a pure chloride standard. Check the solution at least monthly to assure a constant reagent. NOTE 1A sodium chloride crystal as used in infra-red spectrometer cells is a suitable chloride standard. NOTE 2Dry the

44、silver nitrate overnight in a desiccator before making up the solution. Both the solid material and the solution must be protected from light by storage in brown glassware in the dark. Sodium diphenyl solution (C 6 H 5 C 6 H 4 Na) NOTEOrganic halogen reagent:30cm 3of this reagent are normally requir

45、ed to give excess reagent. Preparation of sodium diphenyl solution is described in “McCoy The Inorganic Analysis of Petroleum, Chemical Publishing Co. Inc.,212 Fifth Avenue, New York”. 6.7.2 Apparatus Separatory funnel,250cm 3 . Potentiometric titration apparatus. Electrodes: silver and glass electr

46、ode combination is preferred. A silver electrode with a mercurous sulphate reference electrode is an acceptable alternative. Microburette,5cm 3with0,01cm 3divisions. where V is the number of cubic centimeters of0,1mol/dm 3KOH used in the titration N is the molarity of the KOH solution m is the mass

47、of the sample in grams NV VN56,1 m - =EN 60867:1994 BSI 12-1999 5 6.7.3 Procedure 6.7.3.1 Dissolve35,5g 0,1g of the liquid under test in25cm 3toluene in a150cm 3beaker by stirring with a small glass rod. Transfer the solution to a separatory funnel. Rinse the beaker several times with a total of25cm

48、 3toluene and add the rinses to the funnel. 6.7.3.2 Add an excess (about30cm 3is usually sufficient) of sodium diphenyl solution to the contents of the separatory funnel. The excess is indicated by a colour change of blue or green. Stopper the vessel and gently shake to thoroughly mix the solution,

49、venting occasionally to release the excess pressure build-up. 6.7.3.3 Allow the blue-green mixture to stand5min to ensure complete reaction. Remove stopper, add2cm 3of isopropyl alcohol, and swirl with stopper removed until excess reagent is destroyed. 6.7.3.4 Add slowly50cm 3of the nitric acid solution. Ensure that the organic and aqueous phases are in intimate and uniform contact by gentle swirling and rocking for5min. Loosen the stopper occasionally to