BS EN 61065-1993 Method for evaluating the low temperature flow properties of mineral insulating oils after ageing《老化后矿物绝缘油低温流动特性的评估方法》.pdf

1、BRITISH STANDARD BS EN 61065:1993 IEC 1065:1991 Method for evaluating the low temperature flow properties of mineral insulating oils after ageing The European Standard EN61065:1993 has the status of a BritishStandardBSEN61065:1993 This BritishStandard, having been prepared under the directionof the

2、Cables and Insulation Standards Policy Committee, was published underthe authority of the Standards Board and comes into effect on 15May1993 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference CIL/10 Announced in BSI News, January1993 ISBN 0 580 22136 9

3、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 Portu

4、gal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBSEN61065:1993 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 61065 3 National annex NA (informati

5、ve) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN61065:1993 ii BSI 01-2000 National foreword This BritishStandard has been prepared under the direction of the Cables and Insulation Standards Policy Committee and is the English languag

6、e version of EN61065:1993 Method for evaluating the low temperature flow properties of mineral insulating oils after ageing, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1065:1991 published by the International Electrotechnical Commissio

7、n (IEC). WARNING. This BritishStandard calls for the use of substances that may be injurious to health if adequate precautions are not taken. It refers only to the technical suitability and does not absolve the user from legal obligations relating to health and safety any stage. A British Standard d

8、oes 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 from legal obligations. Summary of pages This document comprises a front cover, an in

9、side front cover, pagesi andii, theEN title page, pages2 to6, 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.EUROPEAN STANDARD NORME EUROPENNE

10、 EUROPISCHE NORM EN 61065 February 1993 UDC 621.315.615.2:665.7:620.1:534.42 Descriptors: Electrical insulating oils, mineral oils, flow, pour point, low temperature tests, ageing, viscosity measurement English version Method for evaluating the low temperature flow properties of mineral insulating o

11、ils after ageing (IEC 1065:1991) Mthode dvaluation des proprits dcoulement basse temprature des huiles minrales isolantes, aprs vieillissement (CEI 1065:1991) Verfahren zur Prfung der Klteflieeigenschaften von Isolierlen auf Minerallbasis nach vorhergehender Alterung (IEC 1065:1991) This European St

12、andard was approved by CENELEC on1992-12-09. 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 concer

13、ning 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 language made by translation under the responsibility of a CENELEC member into i

14、ts 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, Iceland, Ireland, Italy,Luxembourg, Netherlands, Norway, Portugal, Spain,

15、 Sweden, Switzerland and United 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 member

16、s Ref. No. EN 61065:1993 EEN61065:1993 BSI 01-2000 2 Foreword The CENELEC questionnaire procedure, performed for finding out whether or not the International Standard IEC1065:1991 could be accepted without textual changes, has shown that no common modifications were necessary for the acceptance as E

17、uropean Standard. The reference document was submitted to the CENELEC members for formal vote and was approved by CENELEC as EN61065 on9 December1992. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Content

18、s Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Summary of the method 3 4 Apparatus and auxiliary materials 3 5 Number of test tubes 3 6 Preparations for the test 3 7 Procedure 3 8 Measurements 4 9 Interpretation of results 4 10 Report 4 Annex ZA (normative) Other international

19、 publications quoted in this standard with thereferences of the relevant European publications 5 latest date of publication of an identical national standard (dop)1993-12-01 latest date of withdrawal of conflicting national standards (dow)1993-12-01EN61065:1993 BSI 01-2000 3 Introduction Mineral ins

20、ulating oils have been traditionally manufactured from naphtenic crudes containing no wax. Modifications in crude supply resulted in manufacturing mineral insulating oils from waxy crudes. Although these crudes are processed in order to lower the wax content, the complete elimination of waxes is eco

21、nomically onerous, so that pour point depressants are added to the partially dewaxed oils in order to meet the required cold flow properties as specified in IEC296. The need has been recognized for a test enabling the evaluation of the stability of pour point depressants and their compatibility with

22、 solid insulation such as paper. 1 Scope This International Standard describes a method for assessing the changes in activity of pour point depressant additives in inhibited and uninhibited mineral insulating oils when aged in the presence of insulating kraft paper. 2 Normative references The follow

23、ing standards contain provisions which through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encour

24、aged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 296:1982, Specification for unused mineral insulating oils for transformers and switchgear. IEC 450:197

25、4, Measurement of the average viscometric degree of polymerization of new and aged electrical papers. IEC 554-3-1:1979, Specification for cellulosic papers for electrical purposes Part3: Specifications for individual materials Sheet1: General purpose electrical paper. IEC 733:1982, Determination of

26、water in insulating oils, and in oil-impregnated paper and pressboard. IEC 813:1985, Test method for evaluating the oxidation stability of hydrocarbon insulating liquids. ISO 3016:1974, Petroleum oils Determination of pour point. ISO 3104:1976, Petroleum products Transparent and opaque liquids Deter

27、mination of kinematic viscosity and calculation of dynamic viscosity. 3 Summary of the method The oil sample is aged according to IEC813 in the presence of a specified amount of cellulosic paper. The effect of ageing on the activity of the pour point depressant is determined from the variations of t

28、he pour point and of the low temperature viscosity. Optionally, the extent of ageing of the oil may be determined by measurement of the total acidity and the sludge content. The average viscometric degree of polymerization of the paper may also be determined. 4 Apparatus and auxiliary materials The

29、apparatus shall conform to clause3 of IEC813. All glassware shall be cleaned in accordance with clause5 of IEC813. In addition to the materials listed in clauses3 and6 of IEC813, the following is required: Kraft paper, according to IEC554-3-1, apparent density0,8kg/dm 3 , thickness0,10mm, in the for

30、m of strips50cm 1,5cm. 5 Number of test tubes The contents of three test tubes are required for the measurements of viscosity and pour point. One additional test tube is necessary if it is desired to determine total acidity and sludge. 6 Preparations for the test 6.1 Wind a paper strip around the bo

31、ttom end of the gas inlet tube on the Drechsel head of the oxidation tube and fix the free end by any suitable means. Do not obstruct the gas outlet opening. Dry the paper in a ventilated oven at105 C overnight or in a vacuum oven at85 C for6h. NOTEThis conditioning is expected to dry the paper to a

32、 water content of less than1% by mass. The water content of the paper may be determined by the method described in IEC733. 6.2 Prepare a catalyst coil as per clause6 of IEC813. 6.3 Weigh25g 0,1g of oil into the oxidation tube. Extract the Drechsel head from the oven and slide the catalyst coil over

33、the gas inlet tube and the paper wrapping. Immediately insert the Drechsel head into the oxidation tube. 6.4 Repeat the steps of6.1 to6.3 for two additional tubes. 7 Procedure 7.1 Adjust the heating bath to maintain the oil in all oxidation tubes at the required temperature of120 C 0,5 C.EN61065:199

34、3 4 BSI 01-2000 7.2 Place the oxidation tubes in the heater using a rubber O-ring if necessary, to close the gap between the tubes and the thermally insulated top. 7.3 Pour25ml of distilled water and a few drops of phenolphthalein indicator solution (into the absorption tubes). Insert the Drechsel h

35、ead and connect it to the oxidation tube. Adjust the air flow to0,15l/h 0,015l/h measured by means of the soapmeter connected to the outlet end of the absorption tubes. 7.4 Oxidize the oil as per clause8 of IEC813 for164h (uninhibited oil) or by a multiple of168h (inhibited oil) while maintaining it

36、s temperature at120 C 0,5 C and the air flow at0,15l/h 0,0151/h. Check air flow and temperature daily. 7.5 At the end of the oxidation period determine the volatile acidity in each absorption tube according to subclause10.3 of IEC813. 7.6 Combine the oil contents of at least three tubes for which co

37、mparable degrees of oxidation (volatile acidity) are indicated. Collect the composite oil in a glass flask, cool to ambient temperature and inspect visually. Filter if any sludge or turbidity is discerned. 7.7 Use the composite oil for measuring viscosity and pour point. Perform optional oil tests o

38、n a separate tube. Reserve one aged paper strip for the determination of the degree of polymerization. 8 Measurements 8.1 Kinematic viscosity Determine viscosity at15 C or30 C according to the class of the oil tested, using ISO3104. 8.2 Pour point Determine pour point according to ISO3016. 8.3 Acidi

39、ty and sludge (optional) Determine volatile acidity, soluble acidity and sludge according to clause10 of IEC813. 8.4 Degree of polymerization (DP) of paper (optional) Determine DP according to IEC450. 9 Interpretation of results 9.1 Viscosity The result obtained on the aged oil is compared with the

40、value recorded for the new oil. Any difference of more than10% of the original value should be taken to indicate a loss of activity of the pour point depressing additive. NOTEWith oils of low oxidation stability, viscosity may increase due to oxidation of the oil. 9.2 Pour point The pour point of th

41、e aged oil should not differ (by more than6 C) from the result recorded for the new oil. 9.3 Oxidation stability related properties Experience to date suggests that no significant changes in oxidation rate should be expected due to the presence of paper. 9.4 Degree of polymerization (DP) The DP of t

42、he aged paper should be judged against the value determined on a sample of new paper dried simultaneously with the test paper samples. 10 Report The report should include: the reference to this standard; the relative (percent) variation of viscosity; the change in pour point ( C); total acidity and

43、sludge percentage (optional); the degree of polymerization of the dried paper end of the aged paper (optional).EN61065:1993 BSI 01-2000 5 Annex ZA (normative) Other international publications quoted in this standard with the referencesofthe relevant European publications When the international publi

44、cation has been modified by CENELEC common modifications, indicated by (mod), the relevant EN/HD applies. Other publications IEC Publication Date Title EN/HD Date 296 1982 Specification for unused mineral insulating oils for transformers and switchgear 450 1974 Measurement of the average viscometric

45、 degree of polymerization of new and aged electrical papers 554-3-1 1979 Specification for cellulosic papers for electrical purposes Part3: Specifications for individual materials Sheet1: General purpose electrical paper 733 1982 Determination of water in insulating oils, and in oil-impregnated pape

46、r and pressboard 813 1985 Test method for evaluating the oxidation stability of hydrocarbon insulating liquids HD486 S1 1987 ISO 3016:1974 Petroleum oils Determination of pour point ISO 3104:1976 Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation o

47、f dynamic viscosity6 blankBSEN61065:1993 BSI 01-2000 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Cables and Insulation Standards Policy Committee (CIL/-) to Technical Committee CIL/10, upon

48、which the following bodies were represented: Association of Consulting Engineers Chemical Industries Association Electricity Industry in United Kingdom ERA Technology Ltd. Health and Safety Executive Institute of Petroleum Transmission and Distribution Association (BEAMA Ltd.) The following bodies w

49、ere also represented in the preparation of the standard, through subcommittees and panels: British (AC) Capacitor Manufacturers Association (BEAMA Ltd.) British Cables Makers Confederation British Lubricants Federation Ltd. National Association of Waste Disposal Contractors National annex NB (informative) Cross-references Publication referred to Corresponding BritishStandard IEC 554-3-1:1979 BS 5626 Cellulosic papers for electrical purposes Part 3 Specification for individual materi