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    • 3. 发明申请
    • HIGH VOLTAGE DIRECT CURRENT CABLE HAVING AN IMPREGNATED STRATIFIED INSULATION
    • 具有隐蔽隔离绝缘的高压直流电缆
    • US20120285725A1
    • 2012-11-15
    • US13515420
    • 2009-12-16
    • Mauro MaritanoGianni Miramonti
    • Mauro MaritanoGianni Miramonti
    • H01B17/34
    • H01B3/52H01B3/54H01B7/0225H01B9/0688
    • A high voltage direct current cable includes at least one electrical conductor, at least one semiconducting layer, at least one stratified insulation made from windings of at least one paper-polypropylene laminate, the stratified insulation being impregnated with at least one electrically insulating fluid having a kinematic viscosity of at least 1,000 cSt at 60EC, wherein the laminate includes at least one paper layer having an air impermeability of at least 100,000 Gurley see. Such a high air impermeability of the paper layer(s) remarkably reduces the swelling of the polypropylene layer(s) during impregnation with a high viscosity insulating fluid, thus preventing delamination, up to the end of the impregnation process for the whole stratified insulation.
    • 高压直流电缆包括至少一个电导体,至少一个半导电层,由至少一个纸 - 聚丙烯层压板的绕组制成的至少一个分层绝缘体,所述分层绝缘体浸渍有至少一个电绝缘流体,其具有 运动粘度在60EC时至少为1000cSt,其中层压板包括至少一层具有至少100,000 Gurley透气性的纸层。 纸层的这种高空气不渗透性显着降低了在用高粘度绝缘流体浸渍期间聚丙烯层的溶胀,从而防止分层,直到整个分层绝缘体的浸渍过程结束。