LOCKING AND INTERLOCKING MECHANISM FOR METALCLAD SWITCHGEAR DRAW-OUT DEVICE Russian patent published in 2003 - IPC

FIELD: high-voltage metalclad switchgear. SUBSTANCE: mounted on switchgear cubicle bottom is duct provided with locking slots for spring-loaded lock of draw-out device. Duct houses two levers mounted therein for rotation. On one end these levers are disposed under locking slots of duct for engaging spring- loaded lock of draw-out device. Spring-loaded lock enters locking slots of duct at the same time moving down and turns mentioned ends of each lever about their axes so that other ends of levers made in the form of plates turn and engage limit-switch pushers. The latter are installed on cubicle walls of metalclad switchgear and function to indicate position of high-voltage circuit breaker and its serviceability, as well as to interlock high-voltage circuit breaker for preventing its unauthorized control.. EFFECT: simplified design of interlocking mechanism, enhanced operating reliability of entire mechanism. 1 cl, 3 dwg