1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Insulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of insulating liquids in the delivered stateBS EN IEC 61125:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE N
2、ORMEN IEC 61125March 2018ICS 29.040.10 Supersedes EN 61125:1993 English VersionInsulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of insulating liquids in the delivered state(IEC 61125:2018)Isolants liquides - Mthodes dessai de la stabilit
3、loxydation - Mthode dessai pour valuer la stabilit loxydation des isolants liquides tels que livrs(IEC 61125:2018)Isolierflssigkeiten - Prfverfahren fr die Oxidationsbestndigkeit - Prfverfahren zur Evaluierung der Oxidationsbestndigkeit von neuen Isolierflssigkeiten(IEC 61125:2018)This European Stan
4、dard was approved by CENELEC on 2018-02-16. 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 concerni
5、ng 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 versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member
6、 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 electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic o
7、f Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.European Committee for Electrotechnical Standardizat
8、ion Comit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische NormungCEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.Ref. No. EN IEC 61125:20
9、18 ENational forewordThis British Standard is the UK implementation of EN IEC 61125:2018. It is identical to IEC 61125:2018. It supersedes BS EN 61125:1993, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee GEL/10, Fluids for electrotechnical application
10、s.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Stan
11、dards Limited 2018ISBN 978 0 580 93856 6ICS 29.040.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2018.Amendments/corrigenda issued since publication
12、Date Text affectedBRITISH STANDARDBS EN IEC 61125:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IEC 61125 March 2018 ICS 29.040.10 Supersedes EN 61125:1993 English Version Insulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of ins
13、ulating liquids in the delivered state (IEC 61125:2018) Isolants liquides - Mthodes dessai de la stabilit loxydation - Mthode dessai pour valuer la stabilit loxydation des isolants liquides tels que livrs (IEC 61125:2018) Isolierflssigkeiten - Prfverfahren fr die Oxidationsbestndigkeit - Prfverfahre
14、n zur Evaluierung der Oxidationsbestndigkeit von neuen Isolierflssigkeiten (IEC 61125:2018) This European Standard was approved by CENELEC on 2018-02-16. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the
15、 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 versions (English, F
16、rench, 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 electrotechnical committees of Austr
17、ia, 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, Serbia, Slovakia, Sloveni
18、a, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All
19、 rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN IEC 61125:2018 E BS EN IEC 61125:2018EN IEC 61125:2018 (E) 2 European foreword The text of document 10/1047/FDIS, future edition 2 of IEC 61125, prepared by IEC/TC 10 “Fluids for electrotechnical
20、 applications“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61125:2018. 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) 2018-11-16 lat
21、est date by which the national standards conflicting with the document have to be withdrawn (dow) 2021-02-16 This document supersedes EN 61125:1993 and EN 61125:1993/A1:2004. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC
22、 shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61125:2018 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be ad
23、ded for the standards indicated: IEC 60296 NOTE Harmonized as EN 60296. IEC 60666 NOTE Harmonized as EN 60666. IEC 61099 NOTE Harmonized as EN 61099. IEC 62021-1 NOTE Harmonized as EN 62021-1. IEC 62770 NOTE Harmonized as EN 62770. BS EN IEC 61125:2018EN IEC 61125:2018 (E) 3 Annex ZA (normative) Nor
24、mative references to international publications with their corresponding European publications The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For unda
25、ted references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European
26、Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60247 - Insulating liquids - Measurement of relative permittivity, dielectric dissipation factor (tan ) and d.c. resistivity EN 60247 - IEC 62021-2 - Insulating liquids - Determination of acidity
27、- Part 2: Colourimetric titration EN 62021-2 - IEC 62021-3 - Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils EN 62021-3 - IEC 60422 2013 Mineral insulating oils in electrical equipment - Supervision and maintenance guidance EN 60422 2013 ISO 383 -
28、 Laboratory glassware; Interchangeable conical ground joints - - ISO 4793 - Laboratory sintered (fritted) filters; Porosity grading, classification and designation - - ISO 6344-1 - Coated abrasives - Grain size analysis - Part 1: Grain size distribution test - - ISO 3104 - Petroleum products - Trans
29、parent and opaque liquids - Determination of kinematic viscosity and calculation of dynamic viscosity EN ISO 3104 - ASTM E287 - Standard specification for laboratory glass graduated burets - - BS EN IEC 61125:2018This page deliberately left blank 2 IEC 61125:2018 IEC 2018 CONTENTS FOREWORD . 5 1 Sco
30、pe 7 2 Normative references 7 3 Terms and definitions 8 4 Apparatus 9 4.1 General principle of the method 9 4.2 Equipment 9 4.2.1 Heating arrangement . 9 4.2.2 Test vessels 10 4.2.3 Absorption tubes 10 4.2.4 Filtering crucibles 10 4.2.5 Porcelain vessels. 11 4.2.6 Flowmeter 11 4.2.7 Timer . 11 4.2.8
31、 Gas supply 11 4.2.9 Analytical balance . 11 4.2.10 Burette 11 4.2.11 Volumetric pipette 11 4.2.12 Volumetric flask . 12 4.2.13 Graduated measuring cylinder . 12 4.2.14 Thermometer . 12 4.2.15 Erlenmeyer flask 12 4.3 Reagents 12 4.3.1 Normal heptane . 12 4.3.2 Alkali blue 6B indicator according to I
32、EC 62021-2 12 4.3.3 Phenolphthalein indicator 12 4.3.4 Potassium hydroxide according to IEC 62021-2 . 12 4.3.5 Oxidant gas . 12 4.3.6 Acetone . 12 4.4 Cleaning of test vessels 12 4.5 Catalyst 13 4.6 Insulating liquid sample conditioning . 13 4.7 Preparation of the test 13 4.8 Determinations on the o
33、xidized insulating liquid 13 4.8.1 Sludge formation . 13 4.8.2 Soluble acidity (SA) . 14 4.8.3 Volatile acidity (VA) . 14 4.8.4 Total acidity (TA) . 15 4.8.5 Dielectric dissipation factor (DDF) . 15 4.8.6 Oxidation rate with air 15 4.8.7 Induction period with air (IP with air) (optional) 15 4.9 Repo
34、rt. 15 4.10 Precision . 16 4.10.1 General . 16 4.10.2 Repeatability (r) (95 % confidence) . 16 4.10.3 Reproducibility (R) (95 % confidence) 16 2 IEC 61125:2018 IEC 2018 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms and definitions 8 4 Apparatus 9 4.1 General principle of the metho
35、d 9 4.2 Equipment 9 4.2.1 Heating arrangement . 9 4.2.2 Test vessels 10 4.2.3 Absorption tubes 10 4.2.4 Filtering crucibles 10 4.2.5 Porcelain vessels. 11 4.2.6 Flowmeter 11 4.2.7 Timer . 11 4.2.8 Gas supply 11 4.2.9 Analytical balance . 11 4.2.10 Burette 11 4.2.11 Volumetric pipette 11 4.2.12 Volum
36、etric flask . 12 4.2.13 Graduated measuring cylinder . 12 4.2.14 Thermometer . 12 4.2.15 Erlenmeyer flask 12 4.3 Reagents 12 4.3.1 Normal heptane . 12 4.3.2 Alkali blue 6B indicator according to IEC 62021-2 12 4.3.3 Phenolphthalein indicator 12 4.3.4 Potassium hydroxide according to IEC 62021-2 . 12
37、 4.3.5 Oxidant gas . 12 4.3.6 Acetone . 12 4.4 Cleaning of test vessels 12 4.5 Catalyst 13 4.6 Insulating liquid sample conditioning . 13 4.7 Preparation of the test 13 4.8 Determinations on the oxidized insulating liquid 13 4.8.1 Sludge formation . 13 4.8.2 Soluble acidity (SA) . 14 4.8.3 Volatile
38、acidity (VA) . 14 4.8.4 Total acidity (TA) . 15 4.8.5 Dielectric dissipation factor (DDF) . 15 4.8.6 Oxidation rate with air 15 4.8.7 Induction period with air (IP with air) (optional) 15 4.9 Report. 15 4.10 Precision . 16 4.10.1 General . 16 4.10.2 Repeatability (r) (95 % confidence) . 16 4.10.3 Re
39、producibility (R) (95 % confidence) 16 BS EN IEC 61125:2018IEC 61125:2018 IEC 2018 3 Annex A (normative) Thermometer specifications 20 Annex B (informative) Method for evaluating the oxidation stability of inhibited insulating liquids in the delivery state by measurement of the induction period with
40、 oxygen 21 B.1 Outline of the method 21 B.2 Reagents and test conditions 21 B.3 Procedure . 21 B.3.1 General . 21 B.3.2 Preparation of the test . 21 B.3.3 Oxidation . 22 B.3.4 Determination of the induction period with oxygen . 22 B.3.5 Determinations on the oxidized oil (optional) 22 B.4 Report. 23
41、 B.5 Precision . 23 B.5.1 General . 23 B.5.2 Relative repeatability (r) (95 % confidence) . 23 B.5.3 Relative reproducibility (R) (95 % confidence) . 23 Annex C (informative) Method for evaluation of thermo-oxidative behaviour of unused ester insulating liquids 24 C.1 Outline of the method 24 C.2 Eq
42、uipment 24 C.2.1 Heating arrangement . 24 C.2.2 Test vessels 24 C.2.3 Reagents . 24 C.3 Test procedure 24 C.3.1 Sample conditioning and preparation . 24 C.3.2 Ageing procedure 25 C.4 Determination of the oxidized insulating liquid . 25 C.4.1 Soluble acidity . 25 C.4.2 Dielectric dissipation factor (
43、DDF) at 90 C 25 C.4.3 Appearance . 25 C.4.4 Kinematic viscosity 25 C.5 Report. 25 C.6 Precision . 26 Bibliography 27 Figure 1 Typical 8 hole (4 x 2) aluminium heating block 17 Figure 2 Aluminium alloy temperature measuring block 17 Figure 3 Position of the tube in the oil bath 18 Figure 4 Oxidation
44、tube or absorption tube 18 Figure 5 Oxidation tube and absorption tube assembly 19 Figure C.1 Headspace vial with copper catalyst . 25 Table 1 Repeatability and reproducibility of the oxidation stability test of uninhibited mineral oil in the delivered state for 164 h at 120 C . 16 Table A.1 Thermom
45、eter specifications . 20 Table B.1 Precision data for induction time with oxygen for the oxidation test for mineral oil according to Annex B . 23 BS EN IEC 61125:2018 4 IEC 61125:2018 IEC 2018 Table C.1 Precision data for headspace procedure according to Annex C 26 BS EN IEC 61125:2018IEC 61125:2018
46、 IEC 2018 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INSULATING LIQUIDS TEST METHODS FOR OXIDATION STABILITY Test method for evaluating the oxidation stability of insulating liquids in the delivered state FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization
47、for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publ
48、ishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
49、participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
