MÉTHODE ET DISPOSITIF POUR MESURER LA TEMPÉRATURE DU POINT CHAUD DANS UN APPAREIL ÉLECTRIQUE CONTENANT DE L'HUILE
    2.
    发明公开
    MÉTHODE ET DISPOSITIF POUR MESURER LA TEMPÉRATURE DU POINT CHAUD DANS UN APPAREIL ÉLECTRIQUE CONTENANT DE L'HUILE 有权
    方法和设备测量的焦点点的温度在含油电气设备

    公开(公告)号:EP2240788A1

    公开(公告)日:2010-10-20

    申请号:EP09707598.0

    申请日:2009-02-05

    Applicant: Hydro-Québec

    CPC classification number: G01K7/42

    Abstract: The invention relates to a method for measuring the real temperature of a hot spot in an oil-containing electric apparatus, such as a power transformer. The electric apparatus is operated in predetermined and changeable operating conditions. The method comprises using one or more chemical compounds or tracers present and soluble in the oil. Each tracer is capable of conversion at a given temperature in order to form a residue such as a soluble gas. Due to the presence of residue in the oil, the operator can determine in which predetermined operational conditions the hot spot has been reached, and derive therefrom the hot spot for a given condition. The different compounds used include diazoic compounds, carbonyl metals, dyes, pigments, liquid crystals or albumins. The method can also be used for checking the quality of the marketed apparatus and estimating the lifespan thereof.

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