DISCONNECTING SWITCH Russian patent published in 2002 - IPC

FIELD: power engineering; high-voltage switching devices. SUBSTANCE: disconnecting switch designed for operation outdoors on up to 20-kV overhead power transmission lines under ice conditions has frame, closing lever, fixed contact members connected through insulators to frame, movable contact member which is, essentially, spring-loaded blade mounted on insulator with travel limiter and projections on either side of movable contact member at different height from insulator; novelty is that movable contact is provided with electricity conducting links insulated on both ends and electrically interconnected through movable contact member proper by welding or soldering face edges of links to movable contact member; links are positioned so that they face each other; they are made of material whose electric conductivity is lower than that of movable contact member (spring-loaded blade) in vicinity of contact between movable and fixed members so that their generating surfaces are, essentially, diagonally opposite edges of movable contact member for contacting fixed contact members through these surfaces when movable contact member turns about longitudinal axis through angle where b is blade thickness; a is blade width. EFFECT: enhanced reliability under ice conditions. 2 cl, 6 dwg