POLYMERIC INSULATOR Russian patent published in 2005 - IPC

FIELD: electrical engineering.

SUBSTANCE: proposed polymeric insulator has polymeric stick reinforced by metal end terminal made in the form of cup whose bottom is covered with adhesive layer and side wall has conical inner surface on open end. Insulator stick is enclosed by rubber safety shell whose side portion is made in the form of cone and installed through adhesive layer in conical surface of current-carrying metal end terminal whose bottom is hermetically joined by means of, say, cold-hardening epoxy adhesive, with mechanically strong polymeric stick. Conical side wall of safety shell is molded together with inner conical side surface of end terminal with adhesive layer on length A. Molded onto stick is monolithic rubber shell; in the process mold forms conical side portion of this shell corresponding to inner conical surface on each end terminal. Conical surface is formed by mechanical treatment on inner surfaces of end terminals at open end. Stick butt-end and conical surfaces of end terminals are covered with adhesive layer. Stick is inserted in end terminals as far as it will go and tightly fitted to butt-ends of stick in axial direction of end-terminal bottom. Then end terminals and stick are molded together; in the process joint molding of end terminals and safety shell rubber is ensured in molding area A.

EFFECT: enhanced electric safety in continuous operation under high humidity conditions due to effective hermetic sealing of insulator structure.

1 cl, 3 dwg