Barrier of condenser type for field control in transformer bushing terminals

A condenser type barrier for field control of connection of a transformer bushing to the conductor of a transformer winding in converter transformers, the condenser barrier and transformer in combination comprising a condenser body of insulating material with condenser layers of foil type concentrically laid therein, the condenser barrier being in the form of a solid of revolution with an outer circular cylindrical shape and from one end with a first, inwardly-directed straight frustrum of a cone with a largest base area at the end of the condenser barrier, and lower insulator having an inner portion in the shape of a straight frustrum of a cone having a surface spaced substantially parallel to the surface of said inwardly directed straight frustrum of the cone to form a gap therebetween and a substantially cylindrical of said lower insulator attached to said cone portion, and from the other end with a second, inwardly-directed straight frustrum of a cone with a largest base area at the other end of the condenser barrier, the space between each of the straight frustrums of the cones in the condenser barrier being concentrically arranged in an open, inner, straight circular cylinder with a sectional area equal to the smallest bases of the straight frustoms of the cones;

• said transformer comprising a transformer casing and a fastening flange connected to said substantially cylindrical portion, and a an intermediate flange interconnecting said transformer casing and said fastening flange to surround said condenser barrier, a transformer conductor connected to said lower insulator, said condenser type barrier further comprising a tube extending from the narrow portion of said second straight frustrum of the cone through said transformer casing and said conductor passing through said tube, said tube being electrically connected to said conductor and to said condenser type barrier.