METALCLAD SWITCHGEAR Russian patent published in 2001 - IPC

FIELD: electrical engineering. SUBSTANCE: device has circuit breaker with vacuum arc chutes of its phase modules arranged at different distances from operating mechanism and placed in tubular insulating housings. Movable contacts of collet-type ground disconnecting switch connect potential leads of movable contacts of circuit-breaker phase modules to collecting buses when moving horizontally. In addition, movable contacts of ground disconnecting switch function as primary windings of bushing-type current transformers. Potential leads of fixed contacts incorporated in vacuum arc chutes of phase modules are dressed with cable lugs. Device is designed so that routine maintenance of its cable can be conducted without opening cable compartment by turning out plugs on face panel and inserting in their place special tools made of shell and conductor. Circuit breaker and selector switch are provided with interlocking devices complying with GOST and IEC. EFFECT: enhanced operating reliability; facilitated maintenance of switchgear cable. 2 dwg