1、BRITISH STANDARD BS EN 61181:2007Mineral oil-filled electrical equipment Application of dissolved gas analysis (DGA) to factory tests on electrical equipmentICS 29.040.10; 29.180nullnull nullnullnullnullnullnullnull nullnullnullnullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull n
2、ullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnullnull+A1:2012National forewordThis British Standard is the UK implementation of EN 61181:2007+A1:2012, It is identical to IEC 61181:2007 incorporating amendment 1:2012. It super
3、sedes BS EN 61181:2007 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by !“.The UK participation
4、in its preparation was entrusted to Technical Committee GEL/10, Fluids for electrotechnical applications.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 ar
5、e responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 61181:2007+A1:2012This British Standard waspublished under the authorityof the Standards Policy andStrategy Committeeon 31 May 2007 The British Standards Institution 2012.
6、 Published by BSI Standards Limited 2012Amendments/corrigenda issued since publicationDate Comments 30 June 2012 Implementation of IEC amendment 1:2012 with CENELEC endorsement A1:2012: Annex ZA updated, Annex ZB inserted.ISBN 978 0 580 75422 7EUROPEAN STANDARD EN 61181:2007+A1NORME EUROPENNE EUROPI
7、SCHE NORMCENELEC European Committee for Electrotechnical Standardization Comit Europen de NormalisationElectrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any formand byanymeans rese
8、rved worldwide for CENELEC members. Ref. No. EN 61181:2007 E ICS 29.040.10; 29.180 English version Mineral oil-filled electrical equipment - Application of dissolved gas analysis (DGA) to factory tests on electrical equipment (IEC 61181:2007)Matriels lectriques imprgns dhuile minrale - Application d
9、e lanalyse des gaz dissous (AGD) lors dessais en usine de matriels lectriques (CEI 61181:2007) Getrnkte Isolierstoffe - Verwendung der Gasanalyse fr gelste Gase (DGA) als Werksprfung fr elektrische Betriebsmittel (IEC 61181:2007) This European Standard was approved by CENELEC on 2007-03-01. CENELEC
10、members arebound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving thisEuropean Standard the status ofanational standardwithout anyalteration. Up-to-date lists and bibliographical references concerning suchnational standards may be obtained on application
11、to the Central Secretariat or toanyCENELEC member. This European Standard exists in three officialversions (English, French, German). A version in any other language made by translationunder the responsibility of aCENELEC member intoits own languageandnotified to the Central Secretariat has the same
12、 status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, theCzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,Latvia, Lithuania,Luxembourg, Malta, the Netherlands, Norway, P
13、oland, Portugal, Romania,Slovakia, Slovenia, Spain,Sweden, Switzerlandand theUnited Kingdom. May 2012 Foreword The text of document 10/675/FDIS, future edition2 of IEC 61181, prepared by IEC TC 10, Fluids for electrotechnical applications, was submitted to the IEC-CENELEC parallel vote and was appro
14、ved by CENELEC as EN 61181 on 2007-03-01.This European Standard supersedes EN 61181:1993. EN 61181:2007 includes the following significant technical changes with respect to EN 61181:1993: the specific procedures used during factory tests (sampling location, sampling frequency, gas extraction and chr
15、omatographic analysis in the laboratory) are described in more detail; information is provided in Annex A concerning the residual gas contents recommended before thermaltests on power transformers, typical gas valuesobserved during the tests and cases where gas formation during the tests was followe
16、d by problems in the transformers; typical values observed during chopped lightning-impulse tests on instrument transformers are indicated in Annex B. The following dates were fixed: latest date by which the EN has to be implementedat national level by publication of an identical national standard o
17、r by endorsement (dop) 2007-12-01 latest date by which the national standards conflictingwith the EN have to be withdrawn (dow) 2010-03-01 Annex ZA has been added by CENELEC. _Endorsement notice The text of the International Standard IEC 61181:2007 was approved by CENELEC as a EuropeanStandard witho
18、ut any modification. _ BS EN 61181:2007+A1:2012 EN 61181:2007+A1:2012 (E) 2 Foreword to amendment A1 The text of document 10/881/FDIS future edition 1 of IEC 61181:2007/A1, prepared by IEC/TC 10 “Fluids for electrotechnical applications“ was submitted to the IEC-CENELEC parallel vote and approved by
19、 CENELEC as EN 61181:2007/A1:2012. 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) 2012-12-29 latest date by which the national standards conflicting with the document ha
20、ve to be withdrawn (dow) 2015-03-29 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 International S
21、tandard IEC 61181:2007/A1:2012 was approved by CENELEC as a European Standard without any modification. BS EN 61181:2007+A1:2012 EN 61181:2007+A1:2012 (E) 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents,
22、 in whole or in part, are normatively referenced in this 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 publ
23、ication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60475 2011 Method of sampling insulating liquids EN 60475 2011 IEC 60567 2011 Oil-filled electrical equipment - Sampling of gases and analysis of free and dissolve
24、d gases - Guidance EN 60567 2011 BS EN 61181:2007+A1:2012 EN 61181:2007+A1:2012 (E) 4 Annex ZB (normative) Special national conditions Special national condition: National characteristic or practice that cannot be changed even over a long period, e.g. climatic conditions, electrical earthing conditi
25、ons. NOTE If it affects harmonization, it forms part of the European Standard / Harmonization Document. For the countries in which the relevant special national conditions apply these provisions are normative, for other countries they are informative. Clause Special national condition Annex A Table
26、A.1 France Due to historical electrical service conditions of shell-type transformers, the typical values of CO2gas production during temperature rise tests shall be in accordance with EN 60076-2:2011, Annex D. _ BS EN 61181:2007+A1:2012 EN 61181:2007+A1:2012 (E) 5 EN 61181:2007CONTENTS INTRODUCTION
27、.71 Scope 82 Normative references.83 General caution, health, safety and environmental protection84 Oil sampling.94.1 General.94.2 Sample containers.94.3 Sampling location94.4 Sampling frequency.4.5 Sample labelling104.6 Sample storage.104.7 Disposal of waste oil115 Factors affecting gassing rate du
28、ring thermal tests116 Dissolved gas extraction and analysis.117 Report13Annex A (informative) Gas formation rates during thermal tests on power transformers.14Annex B (informative) Gas formation rates during chopped-lightning impulse tests oninstrument transformers 6.16 Bibliography.17Table 1 Requir
29、ed detection limits for factory tests.Table A.1 Ranges of90 % typical rates of gasformation in modern, mineral oil-filledpower transformers during thermal tests, in l/l/h.14Table A.2 Survey of cases followed by problems incore-type, mineral oil- filled power transformers, for various rates of gas fo
30、rmation observed during the thermal tests, (values in l/l/h).15Table B.1 90 % typical gas concentration increases observedbetween thebeginningand the end of chopped lightning-impulse tests on instrument transformers16BS EN 61181:2007+A1:2012 EN 61181:2007+A1:2012 (E) 6 119INTRODUCTION IEC technical
31、committee 10, responsible for IEC 61181, hasprepared guidelines for performing DGA measurements during factory testing on equipment filled with mineral insulating oil in order to ensure consistency in the industry and improve the confidencewith which the results will be used. DGA is used routinely a
32、s a standard quality control procedure during and after factory tests on electrical equipment, for example during temperature-rise and chopped lightning-impulse tests, to indicate that adesign meets specified requirements. Due to the small quantities ofgases generated during factory tests, specific
33、requirements are necessaryfor the sampling and analysis of oil samples and the interpretation of results. Acceptance criteria are beyond the scope of TC 10. Attention is drawn, however, to the factthat the guidelines issued by CIGRE in 1993-1995 1 1 do not apply any more to transformers manufactured
34、 today, the design of which having been improved. Examples of values actuallyobserved today areindicated in Annexes A and B. 1 Figuresin square brackets refer to the bibliography. BS EN 61181:2007+A1:2012 EN 61181:2007+A1:2012 (E) 7 MINERAL OIL-FILLED ELECTRICAL EQUIPMENT APPLICATION OF DISSOLVED GA
35、S ANALYSIS (DGA) TO FACTORY TESTS ON ELECTRICAL EQUIPMENT 1 Scope This International Standard specifies oil-sampling procedures,analysis requirements and procedures, and recommends sensitivity, repeatability and accuracycriteria for the application of dissolved gasanalysis(DGA) tofactory testing of
36、new power transformers,reactors and instrument transformers filledwith mineral insulating oil when DGA testing has been specified.The most effective and useful application of DGA techniques to factory testing is during theperformance of long-term tests, typically temperature-rise(heat run)and overlo
37、ading tests onpower transformers and reactors, also impulsetests on instrument transformers. DGA may also be valuable for over-excitation tests runoveranextended periodof time.Experience with DGA results, before and after short-time dielectric tests, indicates that DGA is normally less sensitive tha
38、n electrical and acoustic methods for detecting partial discharges.However,DGA will indicate when thesepartialdischarges become harmful to the insulation and may be detected by inspection 2 . 2 Normative references The following referenced document is indispensable for the application of thisdocumen
39、t. For dated references, only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments) applies. 3 General caution, health, safety and environmental protection This standard does not purport to address all the safety problems associate
40、d with its use.It istheresponsibility of the user of thestandard to establish appropriate health and safety practices and determine the applicability of regulatory limitations prior to use.The mineral insulating oils which are thesubject of thisstandardshould be handled with due regard to personal h
41、ygiene. Direct contact with the eyes may cause irritation. In the case ofeye contact, irrigation with copious quantities ofclean running water should be carried out andmedical advice sought. Some of the tests specified in this standard involve the use ofprocesses that could lead to a hazardous situa
42、tion. Attention is drawn tothe relevantstandard for guidance. !“IEC 60475:2011, Method of sampling insulating liquids IEC 60567:2011, Oil-filled electrical equipment Sampling of gases and analysis of free and dissolved gases Guidance BS EN 61181:2007+A1:2012 EN 61181:2007+A1:2012 (E) 8 This standard
43、 isapplicable to mineral insulating oils and used sample containers, the disposal or decontamination of which must be done accordingto local regulations. Every precautionshould betakento prevent release of mineral oil into the environment. 4 Oil sampling 4.1 General Sampling of oil shall be carried
44、out usingapparatus and methods complying with IEC 60475:2011 . It is recommended that samples be takenby qualifiedpersonnel, trained to operate in accordance with . Samples shall be taken in duplicate (test sample and spare sample). 4.2 Sample containersThe most appropriate container is a gas-tight
45、glass syringe of suitable capacity and fitted with a three-way sampling cock. For storage and transportation, stainless steel caps may also beused. Alternative sample containers conforming to are acceptable. 4.3 Sampling location Oil samples shall berepresentative of the bulkof the oil in the equipm
46、ent. In power transformers, oil samples shall be taken from the main oil stream (e.g. at the ground level ofthe pipes circulating the oil through the radiators, whenthe pump is in operation, or using ametal pipe to bring the oil from the top oil valve to the ground). Points outside the mainoilstream
47、 (e.g. from the bottom valve of the tank) shall be disregarded. For instrumenttransformers, follow the indications of manufacturers. When using syringes, draining ofatleast 2l ofoil is recommended before sampling (when using bottles, twice the volume of the bottle or 5 l). When using bottles, a p ie
48、ce of oil-compatible tubing shouldbe used fromthe oil valve to the bottom of the bottle, andthe bottle filled with oilfrom the bottom up. NOTE These provisions are not applicable to electrical equipment of small oil volume. 4.4 Sampling frequency4.4.1 Thermal tests on power transformersIrrespective
49、of the type and duration ofthe test,oil samplesfor DGA shall betaken before thetest begins and after the conclusion of the test. Intermediate samples may be taken during the test dependingon its duration andnature as they may be essential to improve the precision of the dataand the reliability of their evaluation. Practices to that respect vary widely, and it is left to the user to decidethe number of samples to be taken.! “IEC 60475:2011 ! “IEC 60475:2011 ! “BS EN
