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LOS TRANSFORMADORES SECOS: UNA SOLUCION SEGURA, FIABLE Y ECOLOGICA

NOVEMBER 1991   -  Volume: 66 -  Pages: 27-29

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Received Date :   1 November 1991


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Article type:
ARTICULO DE INVESTIGACION / RESEARCH ARTICLE
Section:
VARIOUS

Los transformadores de distribución (reductores de la tensión hasta el nivel de consumo), generalmente se construyen utilizando como elemento aislante y refrigerante el aceite mineral, pero en aquellos casos en que, por razones técnicas o de seguridad, no puede aceptarse, es posible utilizar como alternativa transformadores con fluido de silicona o bien el transformador seco. El transformador seco convencional, construido con materiales a base de aislamientos clase F y H, no tiene el problema de ser inflamable como el de aceite, pero, si está construido por el proceso de impregnación con barnices, no se puede considerar como alternativa fiable del transformador de aceite para niveles de tensión superiores a 12 kV debido a los altos valores de descargas parciales que aparecen con este tipo de construcción y a su mal comportamiento ante los ensayos de impulso a ondas del tipo rayo.

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