IEC/TR 61946-ed.1.0

Detail information

Designation: IEC/TR 61946-ed.1.0

Publication date: 23/02/2007

Pages: 27

Country: International technical standard

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Anotation

Describes a test method for the classification of mineral insulating oils as either paraffinic or naphthenic, by means of low-temperature differential scanning calorimetry (DSC). For the purpose of this technical report, the typical operating temperature range extends from -100 °C to +100 °C. The temperature range can be extended, depending upon the instrumentation used. The method is applicable to mineral insulating oils obtained from petroleum crudes. It may be also applied to mineral oils containing pour point depressants, as these additives do not prevent the formation of paraffin crystals but only the growing of such micro-crystals. Couvre une methode dessai pour la classification des huiles minerales isolantes telles que paraffiniques ou naphtheniques, au moyen de lanalyse calorimetrique differentielle a balayage a basse temperature (DSC). Dans le cadre du present rapport, la plage typique de temperatures de fonctionnement setend de -100 °C a +100 °C. La plage de temperatures peut etre etendue en fonction des appareils de mesure utilises. La methode est applicable aux huiles minerales isolantes obtenues a partir de petroles bruts. Elle peut egalement etre appliquee aux huiles minerales contenant des ameliorants de point decoulement, car ces additifs nempechent pas la formation de cristaux de paraffine mais uniquement le developpement de micro-cristaux.