1、BSI Standards PublicationFluids for electrotechnical applications Unused natural esters for transformers and similar electrical equipmentBS EN 62770:2014National forewordThis British Standard is the UK implementation of EN 62770:2014. It is identical to IEC 62770:2013.The UK participation in its pre
2、paration was entrusted to TechnicalCommittee GEL/10, Fluids for electrotechnical applications.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible
3、 for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 77526 0ICS 29.040.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Polic
4、y and Strategy Committee on 30 April 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62770:2014EUROPEAN STANDARD EN 62770 NORME EUROPENNE EUROPISCHE NORM April 2014 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisati
5、on Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62770:2014 E ICS 29.040 English version F
6、luids for electrotechnical applications - Unused natural esters for transformers and similar electrical equipment (IEC 62770:2013) Fluides pour applications lectrotechniques - Esters naturels neufs pour transformateurs et matriels lectriques analogues (CEI 62770:2013) Flssigkeiten fr elektrotechnisc
7、he Anwendungen - Neue natrliche Ester fr Transformatoren und hnliche elektrische Betriebsmittel (IEC 62770:2013) This European Standard was approved by CENELEC on 2013-12-24. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
8、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 CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official
9、 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnica
10、l committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slov
11、akia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 62770:2014EN 62770:2014 - 2 - Foreword The text of document 10/909/FDIS, future edition 1 of IEC 62770, prepared by IEC TC 10 “Fluids for electrotechnical applications“ was submitted to the IEC-CENELEC parallel vote and
12、 approved by CENELEC as EN 62770:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-10-18 latest date by which the national standards conflicting with the documen
13、t have to be withdrawn (dow) 2016-12-24 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the Internation
14、al Standard IEC 62770:2013 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60422 NOTE Harmonised as EN 60422. IEC 61039 NOTE Harmonised as EN 61039. IEC 61099 NOT
15、E Harmonised as EN 61099. IEC 61868 NOTE Harmonised as EN 61868. BS EN 62770:2014- 3 - EN 62770:2014 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this
16、 document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indic
17、ated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60076-14 - Power transformers - Part 14: Liquid-immersed power transformers using high-temperature insulation materials EN 60076-14 - IEC 60156 - Insulating liquids - Determination of the breakdown voltage at power freq
18、uency - Test method EN 60156 - IEC 60247 - Insulating liquids - Measurement of relative permittivity, dielectric dissipation factor (tan d) and d.c. resistivity EN 60247 - IEC 60296 - Fluids for electrotechnical applications - Unused mineral insulating oils for transformers and switchgear EN 60296 -
19、 IEC 60475 - Method of sampling insulating liquids EN 60475 - IEC 60666 - Detection and determination of specified additives in mineral insulating oils EN 60666 - IEC 60814 - Insulating liquids - Oil-impregnated paper and pressboard - Determination of water by automatic coulometric Karl Fischer titr
20、ation EN 60814 - IEC 611001)- Classification of insulating liquids according to fire point and net calorific value EN 61100 - IEC 61125 1992 Unused hydrocarbon based insulating liquids - Test methods for evaluating the oxidation stability EN 61125 1993 IEC 61198 - Mineral insulating oils - Methods f
21、or the determination of 2-furfural and related compounds EN 61198 - IEC 61619 - Insulating liquids - Contamination by polychlorinated biphenyls (PCBs) - Method of determination by capillary column gas chromatography EN 61619 - IEC 61620 - Insulating liquids - Determination of the dielectric dissipat
22、ion factor by measurement of the conductance and capacitance - Test method EN 61620 - 1)Withdrawn in 2009 and partially replaced by IEC 61039. BS EN 62770:2014EN 62770:2014 - 4 - IEC 62021-3 - Insulating liquids - Determination of acidity - Part 3: Test methods for non mineral insulating oils EN 620
23、21-3 - IEC 62535 2008 Insulating liquids - Test method for detection of potentially corrosive sulphur in used and unused insulating oil EN 62535 2009 IEC 62697-1 - Test method for quantitative determination of corrosive sulfur compounds in unused and used insulating liquids - Part 1: Test method for
24、 quantitative determination of dibenzyldisulfide (DBDS) EN 62697-1 - ISO 2592 - Determination of flash and fire points - Cleveland open cup method - - ISO 2719 - Determination of flash point - Pensky-Martens closed cup method - - ISO 3016 - Petroleum products - Determination of pour point - - ISO 31
25、04 - Petroleum products - Transparent and opaque liquids - Determination of kinematic viscosity and calculation of dynamic viscosity - - ISO 3675 - Crude petroleum and liquid petroleum products - Laboratory determination of density - Hydrometermethod - - ISO 12185 - Crude petrolelum and petroleum pr
26、oducts - Determination of density - Oscillating U-tube method - - ASTM D 1275 - Standard Test Method for Corrosive Sulfur in Electrical Insulating Oils - - OECD 201-203 - Test Guidelines for ecotoxicity - - OECD 301 Guideline for testing of chemicals adopted by European Council - - US EPA - Office o
27、f Prevention, Pesticides and Toxic Substances (OPPTS) - - 835.311 - Fate, Transport and Transformation Test Guidelines - - BS EN 62770:2014 2 62770 IEC:2013 CONTENTS INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and definitions 9 4 Properties, their significance and test methods 9 4.1
28、General 9 4.2 Physical properties 9 Appearance 9 4.2.1Viscosity . 10 4.2.2Pour point . 10 4.2.3Water content . 10 4.2.4Density . 10 4.2.54.3 Electrical properties . 10 Breakdown voltage . 10 4.3.1Dielectric dissipation factor (DDF) 10 4.3.2Relative permittivity (dielectric constant) . 11 4.3.34.4 Ch
29、emical properties . 11 Acidity 11 4.4.1Corrosive sulfur 11 4.4.2Additive content 11 4.4.3Furfural content 11 4.4.44.5 Performance 11 Oxidation stability . 11 4.5.1Total acidity 12 4.5.2Viscosity . 12 4.5.3Dielectric dissipation factor (DDF) 12 4.5.44.6 Health, safety and environmental (HSE) properti
30、es 12 Fire point and flash point 12 4.6.1Polychlorinated biphenyls (PCBs) . 12 4.6.2Biodegradation . 12 4.6.3Toxicity . 12 4.6.45 Classification, identification, general delivery requirements and sampling 12 5.1 Classification . 12 5.2 Identification and general delivery requirements 13 5.3 Sampling
31、 13 Annex A (normative) Summary of the test method for evaluating oxidation stability of unused natural esters 15 A.1 Introductory remark 15 A.2 Test conditions 15 A.3 Precision 15 A.4 Relative repeatability (r) . 15 A.5 Relative reproducibility (R) . 15 Annex B (informative) Specifications of low-v
32、iscosity insulating fluids derived from natural esters 16 Bibliography 17 BS EN 62770:201462770 IEC:2013 3 Table 1 General specifications . 14 Table A.1 Relative repeatability and relative reproducibility obtained for different parameters during RRT . 15 Table B.1 Specifications for low-viscosity of
33、 monoesters derived from natural esters . 16 BS EN 62770:2014 6 62770 IEC:2013 INTRODUCTION Because of their higher fire points and better environmental compatibility relative to petroleum derived insulating mineral oil, the use of vegetable oils and other natural esters is on the rise as insulating
34、 and heat transfer fluids in electrical devices such as transformers. This standard sets performance criteria for unused natural esters earmarked for electrical applications. However, the use of natural esters is recommended only for equipment that is not open to the atmosphere, e.g. sealed transfor
35、mers and reactors because these fluids are prone to rapid oxidation. This International Standard does not purport to address all the safety problems associated with its use. It is the responsibility of the user of the standard to establish appropriate health and safety practices and determine the ap
36、plicability of regulatory limitation prior to use. Unused natural esters which are the subject of this standard should be handled with due regard to personal hygiene. Direct contact with eyes should be avoided. In case of eye contact, irrigation with copious amounts of clean running water should be
37、carried out and medical advice sought. Performance of some of the tests mentioned in this standard could lead to a hazardous situation. Attention is drawn to the relevant standard test method for guidance. The disposal of natural esters, chemicals and sample containers mentioned in this standard sho
38、uld be carried out in accordance with current national legislation with regard to the impact on the environment. Every precaution should be taken to prevent the release of natural esters into the environment. BS EN 62770:201462770 IEC:2013 7 FLUIDS FOR ELECTROTECHNICAL APPLICATIONS UNUSED NATURAL ES
39、TERS FOR TRANSFORMERS AND SIMILAR ELECTRICAL EQUIPMENT 1 Scope This International Standard describes specifications and test methods for unused natural esters in transformers and similar oil-impregnated electrical equipment in which a liquid is required as an insulating and heat transfer medium. Use
40、 of natural esters is not recommended for electrical equipment that is open to the atmosphere. In this standard the term “natural esters” applies to insulating fluids for transformers and similar electrical equipment with suitable biodegradability and environmental compatibility. Such natural esters
41、 are vegetable oils obtained from seeds and oils obtained from other suitable biological materials and delivered to an agreed point, at a set time period. These oils are comprised of triglycerides. Natural esters with additives are within the scope of this standard. Because of their different chemic
42、al composition, natural esters differ from insulating mineral oils and other insulating fluids that have high fire points, such as synthetic esters or silicone fluids. Natural, ester-derived insulating fluids with low viscosity have been introduced but are not covered by this standard. Pertinent pro
43、perties of such fluids are given in Annex B. This standard is applicable only to unused natural esters. Reclaimed natural esters and natural esters blended with non-natural esters fluids are beyond the scope of this standard. The chemical nomenclature and scientific notations used in the standard ar
44、e in accordance with the IUPAC handbook (Quantities, Units and Symbols in Physical Chemistry). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited appl
45、ies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60076-14, Power transformers - Part 14: Liquid-immersed power transformers using high-temperature insulation materials IEC 60156, Insulating liquids Determination of the breakdown volta
46、ge at power frequency Test method IEC 60247, Insulating liquids Measurement of relative permittivity, dielectric dissipation factor and DC resistivity of insulating fluids IEC 60296, Fluids for electrotechnical applications Unused mineral insulating oils for transformers and switchgear IEC 60475, Me
47、thod of sampling liquid dielectrics IEC 60666, Detection and determination of specific additives in mineral insulating oils BS EN 62770:2014 8 62770 IEC:2013 IEC 60814, Insulating liquids Oil-impregnated paper and pressboard Determination of water by automatic coulometric Karl Fischer titration IEC
48、61100, Classification of insulating liquids according to fire-point and net calorific value1IEC 61125:1992, Unused hydrocarbon-based insulating fluids Test methods for evaluating the oxidation stability IEC 61198, Mineral insulating oils Methods for the determination of 2-furfural and related compou
49、nds IEC 61619, Insulating liquids Contamination by polychlorinated biphenyls (PCBs) Method of determination by capillary column gas chromatography IEC 61620, Insulating liquids Determination of the dielectric dissipation factor by measurement of the conductance and capacitance Test method IEC 62021-3, Insulating liquids Determination of acidity Part 3: Test methods for non mineral insulating oils2IEC 62535:2008, Insulating liquids Test method for detection of potentially corrosive sulfur in use
