THREE-PHASE HIGH-VOLTAGE VACUUM CIRCUIT BREAKER Russian patent published in 2000 - IPC

FIELD: electrical engineering. SUBSTANCE: circuit breaker has three evacuated arc-control chambers, fastening members for three poles, support insulation, insulating control rods, control unit for movable contacts, and at least one electromagnet for controlling movable contacts of arc-control chambers; we propose positioning evacuated arc-control chambers so that they form triangle in space, to place electromagnet in center of mentioned triangle, and to provide its movable core with three projections joined with insulating control rods and arranged along axis of displacement of evacuated arc-control chambers. EFFECT: simplified design, facilitated operation and maintenance. 1 dwg