1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationOil-filled electrical equipment Sampling of gases and analysis of free and dissolved gases GuidanceBS EN 60567:2011National forewordThis British Standard is the UK implementation
2、 of EN 60567:2011. It is identi-cal to IEC 60567:2011. It supersedes BS EN 60567:2005 which is withdrawn.The UK participation in its preparation was entrusted to Technical CommitteeGEL/10, Fluids for electrotechnical applications.A list of organizations represented on this committee can be obtained
3、onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. The British Standards Institution 2012ISBN 978 0 580 69888 0ICS 17.220.99; 29.035.99; 29.040.10Compliance with a British Standard cann
4、ot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 29 February 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60567:2011EUROPEAN STANDARD EN 60567 NORME EUROPENNE
5、EUROPISCHE NORM December 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form
6、and by any means reserved worldwide for CENELEC members. Ref. No. EN 60567:2011 E ICS 29.040 Supersedes EN 60567:2005English version Oil-filled electrical equipment - Sampling of gases and analysis of free and dissolved gases - Guidance (IEC 60567:2011) Matriels lectriques immergs - Echantillonnage
7、de gaz et analyse des gaz libres et dissous - Lignes directrices (CEI 60567:2011) lgefllte elektrische Betriebsmittel Probennahme von Gasen und Analyse freier und gelster Gase Anleitung (IEC 60567:2011) This European Standard was approved by CENELEC on 2011-11-24. CENELEC members are bound to comply
8、 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 concerning such national standards may be obtained on application to the CEN-CENELEC M
9、anagement 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 into its own language and notified to the CEN-CENELEC Management Centre has
10、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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the N
11、etherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60567:2011EN 60567:2011 - 2 - Foreword The text of document 10/849/FDIS, future edition 4 of IEC 60567, prepared by IEC/TC 10 “Fluids for electrotechnical applications“ was sub
12、mitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60567:2011. 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) 2012-08-24 latest date by which the nati
13、onal standards conflicting with the document have to be withdrawn (dow) 2014-11-24 This document supersedes EN 60567:2005. EN 60567:2011 includes the following significant technical changes with respect to EN 60567:2005: Since the publication of EN 60567:2005, CIGRE TF.D1.01.15 has made progress in
14、several areas of dissolved gas analysis (DGA), notably a) oil sampling, b) laboratory analysis and solubility coefficients of gases in non-mineral oils, c) calibration of the headspace gas extraction method, d) more sensitive detectors for chromatography, e) preparation of air-saturated standards an
15、d f) evaluation of gas monitor readings. These advances are included in EN 60567:2011. Sampling of oil for DGA from oil-filled equipment has been moved from EN 60567 to EN 60475 as reflected in the revised title of this standard. Attention is drawn to the possibility that some of the elements of thi
16、s 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 International Standard IEC 60567:2011 was approved by CENELEC as a European Standard without any modification. In the off
17、icial version, for Bibliography, the following notes have to be added for the standards indicated: 1 ISO/IEC 17025 NOTE Harmonized as EN ISO/IEC 17025. 2 ISO 3675 NOTE Harmonized as EN ISO 3675. BS EN 60567:2011- 3 - EN 60567:2011 Annex ZA (normative) Normative references to international publicatio
18、ns with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
19、 NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60296 - Fluids for electrotechnical applications - Unused mineral insulating oils for transformers and switchgear EN 60296 - IEC 60
20、475 2011 Method of sampling insulating liquids EN 60475 2011 IEC 60599 - Mineral oil-impregnated electrical equipment in service - Guide to the interpretation of dissolved and free gases analysis EN 60599 - ISO 5725 Series Accuracy (trueness and precision) of measurement methods and results - - ASTM
21、 D2780 - Standard Test Method for Solubility of Fixed Gases in Liquids - - BS EN 60567:2011 2 60567 IEC:2011 CONTENTS INTRODUCTION . 7 1 Scope . 9 2 Normative references . 9 3 Sampling of gases from gas-collecting (Buchholz) relays 10 3.1 General remarks 10 3.2 Sampling of free gases by syringe . 10
22、 3.2.1 Sampling equipment 10 3.2.2 Sampling procedure. 11 3.3 Sampling of free gases by displacement of oil . 12 3.4 Sampling of free gases by vacuum 13 3.5 Sampling of oil from oil filled equipment 14 4 Labelling of gas samples 14 5 Sampling, labelling and transferring of oil from oil-filled equipm
23、ent . 14 5.1 Sampling and labelling of oil 14 5.2 Transfer of oil for DGA analysis . 14 5.2.1 Transfer from oil syringes 14 5.2.2 Transfer from ampoules . 15 5.2.3 Transfer from flexible metal bottles 15 5.2.4 Transfer from glass and rigid metal bottles 15 6 Preparation of gas-in-oil standards . 15
24、6.1 General remark . 15 6.2 First method: preparation of a large volume of gas-in-oil standard . 15 6.2.1 Equipment . 15 6.2.2 Procedure 16 6.2.3 Calculation 18 6.3 Second method: preparation of gas-in-oil standards in a syringe or a vial 18 6.3.1 Equipment . 19 6.3.2 Procedure 20 7 Extraction of ga
25、ses from oil 20 7.1 General remarks 20 7.2 Multi-cycle vacuum extraction using Toepler pump apparatus . 21 7.2.1 Toepler pump extraction apparatus 21 7.2.2 Extraction procedure . 24 7.3 Vacuum extraction by partial degassing method 25 7.3.1 General remark . 25 7.3.2 Partial degassing apparatus 25 7.
26、3.3 Extraction procedure . 26 7.4 Stripping extraction method . 26 7.4.1 Stripping apparatus . 26 7.4.2 Outline of procedure 29 7.5 Headspace method . 30 7.5.1 Principle of the method 30 7.5.2 Symbols and abbreviations 30 7.5.3 Headspace extraction apparatus 31 7.5.4 Headspace extraction procedure .
27、 35 BS EN 60567:201160567 IEC:2011 3 7.5.5 Calibration of the headspace extractor 39 8 Gas analysis by gas-solid chromatography . 41 8.1 General remarks 41 8.2 Outline of suitable methods using Table 4 . 42 8.3 Apparatus 42 8.3.1 Gas chromatograph . 42 8.3.2 Columns 44 8.3.3 Carrier gas 44 8.3.4 Det
28、ectors . 44 8.3.5 Methanator 44 8.3.6 Cold trap . 44 8.3.7 Integrator and recorder 44 8.4 Preparation of apparatus . 45 8.5 Analysis 45 8.6 Calibration of the chromatograph . 45 8.7 Calculations 46 9 Quality control 46 9.1 Verification of the entire analytical system . 46 9.2 Limits of detection and
29、 quantification . 47 9.3 Repeatability, reproducibility and accuracy 47 9.3.1 General remark . 47 9.3.2 Repeatability . 48 9.3.3 Reproducibility . 48 9.3.4 Accuracy . 48 10 Report of results . 49 Annex A (informative) Correction for incomplete gas extraction in partial degassing method by calculatio
30、n . 51 Annex B (informative) Mercury-free and shake test versions of the standard extraction methods 53 Annex C (informative) Preparation of air-saturated standards 55 Annex D (informative) Correction for gas bubbles in syringes and air gap in rigid bottles 56 Annex E (informative) Procedure for com
31、paring gas monitor readings to laboratory results 57 Bibliography 58 Figure 1 Sampling of gas by syringe 11 Figure 2 Sampling of free gases by oil displacement 12 Figure 3 Sampling of free gases by vacuum . 13 Figure 4 First method of preparing gas-in-oil standards . 17 Figure 5 Second method for pr
32、eparing gas-in-oil standards 19 Figure 6 Example of a Toepler pump extraction apparatus . 23 Figure 7 Types of glass strippers . 27 Figure 8 Stainless steel stripper . 28 Figure 9 Schematic arrangement for connecting an oil stripper to a gas chromatograph 29 Figure 10 Schematic representation of hea
33、dspace sampler 30 BS EN 60567:2011 4 60567 IEC:2011 Figure 11 Vial filled with water . 32 Figure 12 Revolving table 34 Figure 13 Schematic arrangement for gas chromatography 43 Figure B.1 Schematic representation of methods in Annex B . 54 Table 1 Information required for gas samples 14 Table 2 Exam
34、ples of headspace operating conditions 35 Table 3 Headspace partition coefficients at 70 C in mineral insulating oil . 40 Table 4 Examples of gas chromatographic operating conditions . 41 Table 5 Required limits of detection in oil . 47 Table 6 Examples of accuracy of extraction methods . 49 Table A
35、.1 Examples of solubility coefficients ai(at 25 C) reported by CIGRE TF D1.01.15 . 51 Table C.1 Examples of solubility values of air for different oil types . 55 Table C.2 Examples of temperature variations for oxygen and nitrogen solubility in mineral oil . 55 BS EN 60567:201160567 IEC:2011 7 INTRO
36、DUCTION Gases may be formed in oil-filled electrical equipment due to natural ageing but also, to a much greater extent, as a result of faults. Operation with a fault may seriously damage the equipment, and it is valuable to be able to detect the fault at an early stage of development. Where a fault
37、 is not severe, the gases formed will normally dissolve in the oil, with a small proportion eventually diffusing from the liquid into any gas phase above it. Extracting dissolved gas from a sample of the oil and determining the amount and composition of this gas is a means of detecting such faults,
38、and the type and severity of any fault may often be inferred from the composition of the gas and the rate at which it is formed. In the case of a sufficiently severe fault, free gas will pass through the oil and collect in the gas-collecting (Buchholz) relay if fitted; if necessary, this gas may be
39、analysed to assist in determining the type of fault that has generated it. The composition of gases within the bubbles changes as they move through the oil towards the gas-collecting relay. This can be put to good use, as information on the rate of gas production may often be inferred by comparing t
40、he composition of the free gases collected with the concentrations remaining dissolved in the liquid. The interpretation of the gas analyses is the subject of IEC 60599. These techniques are valuable at all stages in the life of oil-filled equipment. During acceptance tests on transformers in the fa
41、ctory, comparison of gas-in-oil analyses before, during and after a heat run test can show if any hot-spots are present, and similarly analysis after dielectric testing can add to information regarding the presence of partial discharges or sparking. During operation in the field, the periodic remova
42、l of an oil sample and analysis of the gas content serve to monitor the condition of transformers and other oil-filled equipment. The importance of these techniques has led to the preparation of this standard, to the procedures to be used for the sampling, from oil-filled electrical equipment, of ga
43、ses and oils containing gases, and for subsequent analysis. NOTE Methods described in this standard apply to insulating oils, since experience to date has been almost entirely with such oils. The methods may also be applied to other insulating liquids, in some cases with modifications. General cauti
44、on, health, safety and environmental protection 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 applicability of regula
45、tory limitations prior to use. The insulating oils which are the subject of this standard should be handled with due regard to personal hygiene. Direct contact with the eyes may cause irritation. In the case of eye contact, irrigation with copious quantities of clean running water should be carried
46、out and medical advice sought. Some of the tests specified in this standard involve the use of processes that could lead to a hazardous situation. Attention is drawn to the relevant standard for guidance. Mercury presents an environmental and health hazard. Any spillage should immediately be removed
47、 and be properly disposed of. Consult local regulations for mercury use and handling. Mercury-free methods may be requested in some countries. BS EN 60567:2011 8 60567 IEC:2011 Environment This standard is applicable to insulating oils, chemicals and used sample containers. Attention is drawn to the
48、 fact that, at the time of writing of this standard, many insulating oils in service are known to be contaminated to some degree by PCBs. If this is the case, safety countermeasures should be taken to avoid risks to workers, the public and the environment during the life of the equipment, by strictl
49、y controlling spills and emissions. Disposal or decontamination of these oils should be carried out strictly according to local regulations. Every precaution should be taken to prevent release of insulating oil into the environment. BS EN 60567:201160567 IEC:2011 9 OIL-FILLED ELECTRICAL EQUIPMENT SAMPLING OF GASES AND ANALYSIS OF FREE AND DISSOLVED GASES GUIDANCE 1 Scope This International Standard deals with the techniques for sampling free gases from gas-c
