SUSPENSION INSULATOR WITH SEALING INSERT Russian patent published in 2005 - IPC

FIELD: suspension insulators.

SUBSTANCE: proposed suspension insulator has insulating petticoat 1 made of tempered glass or porcelain whose bottom side mounts pin 3 secured thereto by means of cement based binder 4; destructible zinc ring 5 that contacts binder and encloses pin; and annular insert 7 made of conducting material and inserted between petticoat and destructible ring to ensure reliable sealing preventing current leakage through binder. Insert also functions to prevent corrosion of pin and risk of insulator rupture. Conducting insert and destructible ring 5 form annular contact region, 5 to 10 mm high. Binder covers part of destructible ring. Insert is made of flexible material. Conducting material is elastomer incorporating electricity conducting filler particles, such as carbon particles. Suspension insulator string is assembled of set of mentioned suspension insulators. Insulator manufacturing process includes formation of annular insert by injecting elastomer material about pin onto binder; in the process insulator is revolved about its axis.

EFFECT: enhanced service life of insulator extended to that of sealing insert.

8 cl