1、NORME INTERNATIONALE INTERNATIONAL STANDARD CE1 IEC 61198 Premire dition First edition 1993-09 Huiles minrales isolantes - Mthodes pour la dtermination du 2-furfural et ses drivs Mineral insulating oils - Methods for the determination of 2-furfural and related compounds Numro de rfrence Reference nu
2、mber CEMEC 61198: 1993 Numros des publications Numbering Depuis le ler janvier 1997, les publications de la CE1 sont numrotes a partir de 60000. Publications consolides Les versions consolides de certaines publications de la CE1 incorporant les amendements sont disponibles. Par exemple, les numros d
3、dition 1.0, 1.1 et 1.2 indiquent respectivement la publication de base, la publication de base incorporant lamendement 1, et la publication de base incorporant les amendements 1 et 2. Validit de la prsente publication Le contenu technique des publications de la CE1 est constamment revu par la CE1 af
4、in quil reflte ltat actuel de la technique. Des renseignements relatifs la date de reconfir- mation de la publication sont disponibles dans le Catalogue de la CEI. Les renseignements relatifs des questions a ltude et des travaux en cours entrepris par le comit technique qui a tabli cette publication
5、 ainsi que la liste des publications tablies, se trouvent dans les documents ci- dessous: 0 Site web) de la CEI* Catalogue des publications de la CE1 Publi annuellement et mis a jour rgulirement (Catalogue en ligne) Bulletin de ia CEi Disponible la fois au 4te web, de la CEI* et comme priodique imp
6、rim Terminologie, symboles graphiques et littraux En ce qui concerne la terminologie gnrale, le lecteur se reportera la CE1 60050: Vocabulaire Electro- technique International (VEI). Pour les symboles graphiques, les symboles littraux et les signes dusage gnral approuvs par la CEI, le lecteur consul
7、tera la CE1 60027: Symboles littraux any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with
8、the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on which all the National Committees having a special
9、interest therein are represented, express, as nearly as possible, an international consensus of opinion on the subjects dealt with. 3) They have the form of recommendations for international use published in the form of standards, technical reports or guides and they are accepted by the National Com
10、mittees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding nationa
11、l or regional standard shall be clearly indicated in the latter. International Standard IEC 1198 has been prepared by IEC by technical committee 10: Fluids for electrotechnical applications. The text of this standard is based on the following documents: Full information on the voting for the approva
12、l of this standard can be found in the report on voting indicated in the above table. Annex A forms an integral pari of this standard. -6- 1 198 O CE19 993 INTRODUCTION La dgradation des matriaux cellulosiques constituant lisolation solide des matriels lectriques remplis dhuile conduit la formation
13、de plusieurs composs spcifiques de la dgradation de la cellulose, comme les sucres et les drivs furaniques. Les drivs furaniques, dont une grande partie reste adsorbe dans le papier, sont nan- moins lgrement solubles dans lhuile. Leur prsence peut tre utilise comme outil de diagnostic pour les matri
14、els en service et apporter un complment dinformation lanalyse des gaz dissous. 11980 IEC:1993 -7- I NTROD UCTIO N The degradation of cellulosic materials constituting the solid insulation of oil-filled electrical equipment leads to the formation of several compounds specific to cellulose decompositi
15、on, such as sugars and furan derivatives. The furan derivatives, of which a large proportion remains adsorbed on the paper, are nevertheless slightly soluble in oil. Their presence can be used as a diagnostic tool to equipments in service and to supplement information from dissolved gas analysis. -8
16、 1198 0 CEM 993 HUILES MINRALES ISOLANTES - MTHODES POUR LA DTERMINATION DU 2-FURFURAL ET SES DRIVS 1 Domaine dapplication La prsente Norme internationale prcise les mthodes dessais pour lanalyse du 2-furfural et des drivs furaniques apparents rsultant de la dgradation de lisolation cellulosique et
17、 trouvs dans les chantillons dhuile minrale isolante prlevs sur des ma- triels lectriques. Le 2-furfural et les drivs furaniques dissous dans lhuile minrale sont analyss par chromatographie liquide haute performance (HPLC). Avant lanalyse par HPLC, les drivs furaniques sont extraits de lhuile en uti
18、lisant une mthode dextraction approprie telle que lextraction liquide-liquide (mthode A) ou une sparation en phase solide sur cartouche en silice (mthode B). 2 Rfrences normatives Les documents normatifs suivants contiennent des dispositions qui, par suite de la rfrence qui y est faite, constituent
19、des dispositions valables pour la prsente Norme internationale. Au moment de la publication, les ditions indiques taient en vigueur. Tout document normatif est sujet rvision et les parties prenantes aux accords fonds sur la prsente Norme internationale sont invites rechercher la possibilit dapplique
20、r les ditions les plus rcentes des documents normatifs indiqus ci-aprs. Les membres de la CE1 et de IISO possdent le registre des Normes internationales en vigueur. CE1 475: 1974, Mthode dchantillonnage des dilectriques liquides CE1 567: 1992, Guide dchantillonnage de gaz et dhuile dans les matriels
21、 lectriques immergs, pour lanalyse des gaz libres et dissous 3 Echantillonnage Les chantillons dhuile sont collects conformment aux CE1 475 et CE1 567. II convient de protger les chantillons de la lumire directe. 4 Etiquetage des chantillons Les chantillons doivent tre tiquets conformment a la CE1 5
22、67. 5 Appareillage 5.1 Equipement gnral: - verrerie de laboratoire; - bechers et erlenmeyers; - fioles jauges; - pipettes; - balance de prcision (0,l mg). 1198 O IEC:1993 -9- MINERAL INSULATING OILS - METHODS FOR THE DETERMINATION OF 2-FURFURAL AND RELATED COMPOUNDS 1 scope This International Standa
23、rd specifies test methods for the analysis of 2-furfural and related furan compounds resulting from the degradation of cellulosic insulation and found in mineral insulating oil samples taken from electrical equipment. 2-furfural and related furan compounds dissolved in mineral oil are analysed by hi
24、gh performance liquid chromatography (HPLC). Prior to HPLC analysis, furan derivatives are extracted from the oil by use of a suitable extraction method such as liquid-liquid extraction (method A) or solid-phase separation on a silica cartridge (method B). 2 Normative references The following normat
25、ive documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication of this standard, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this Inter
26、national Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 475: 1974, Method of sampling liquid dielectrics IEC 567: 1992, G
27、uide for the sampling of gases and of oil from oil-filled electrical equipment and for the analysis of free and dissolved gases 3 Sampling Oil samples are collected in accordance with IEC 475 and IEC 567. Samples should be protected from direct light. 4 Labelling of samples Samples shall be labelled in accordance with IEC 567. 5 Apparatus 5.1 General equipment: - laboratory glassware; - beakers or Erlenmeyer flasks; - volumetric flasks; - pipettes; - analytical balance (0,l mg).
