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    High-voltage insulation and insulated high-voltage apparatus
    6.
    发明授权
    High-voltage insulation and insulated high-voltage apparatus 失效
    高压绝缘和绝缘高压设备

    公开(公告)号：US3626083A

    公开(公告)日：1971-12-07

    申请号：US3626083D

    申请日：1968-01-12

    申请人： WESTINGHOUSE ELECTRIC CORP

    发明人： MINTER HERBERT F ,  BUCKLEY RICHARD D ,  SEIDEL MARTIN P

    IPC分类号： H01F27/02 ,  H01B3/02

    CPC分类号： H01F27/022 ,  Y10S174/01

    摘要： An admixture of (1) from 55 to 70 percent by weight of hydrated alumina and (2) from 30 to 45 percent by weight of a petroleum oil extended ethylene-propylene-diene terpolymer, containing from 20 to 100 phr. of oil, is molded about electrical apparatus to provide insulation for components thereof. The hydrated alumina is advantageously finely divided so that a major portion or substantially all particles are less than 2 microns. The terpolymer is derived from the reaction of an admixture of (I) from about 85 to 99 molar percent of a mixture of (a) about 3o to 70 molar percent of ethylene and (b) about 30 to 70 molar percent of propylene and (II) from about 1 to 15 molar percent of a diene having isolated or nonconjugated double bonds, at least one of the double bonds of the diene being terminally located.