| 摘要 |
PURPOSE:To make it possible to use an electrode formed by vapor depositing a zinc film having a specified sheet resistance on one side of the dielectric film at high potential gradient by impregnating the insulating oil with a specified viscosity and PV value between dielectric layers. CONSTITUTION:A rough surfaced film 1 mainly composed of polypropylene is a dielectric, and an element condenser is obtained by lapping the films formed a vapor deposition metallic layer 2 mainly composed of Zn with two of them superposed around one side of the film 1. After fixing the terminals at both ends of the metallized contacts 4 by providing them with the thick vapor deposition layers (HE) 3 of both ends of the element condenser, putting into an impregnation tank and making vacuum dry. Then, the insulating oil having viscosity less than 30 centipoise in 20 deg.C and PV value more than 20 is completely impregnated. The sheet resistance of the vapor desposition metallic layer 2 is 6-20OMEGA/square, and HE 3 having a sheet resistance less than 4OMEGA/square and width less than 7mm is formed. Accordingly, it is endurable against the use at high potential gradient.
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