HIGH-VOLTAGE THREE-POLE HIGH-SPEED VACUUM CIRCUIT BREAKER Russian patent published in 2024 - IPC H01H33/66 

FIELD: electricity.

SUBSTANCE: invention relates to high-voltage circuit breakers with vacuum arc-quenching chambers. High-voltage three-pole high-speed vacuum circuit breaker has support insulation, at least three vacuum arc-quenching chambers (VAQC), which are vertically fixed on support insulation. Each VAQC contains: movable and fixed contacts, bearing latch for fixation of movable contacts of VAQC, movable contact control mechanism is arranged in the housing, which is made of two plates connected in parallel and installed at a distance from each other. Second plate is external relative to the whole switch. Adjusting element is made in the form of a regulator axis with the possibility of rotation and attachment to it of a power element, which on one side is fixed on the first inner plate, and on the other side rests on the bushing in the hole in the housing; on which a second disc is additionally installed, having a recess and equipped with a support flange; wherein second disc is drive relative to first disc, which is driven. Spiral springs are arranged on the regulating axle, are fixed by their outer ends to the support flange and are arranged in the same way and oriented in the same way. Spiral springs are connected to the corresponding discs, the spiral spring connected to the first disc is the closing spring, the spiral spring connected to the second disc is the opening spring; wherein inner end of spiral spring pressed to first driven disc is secured to said disc while inner end of spiral spring pressed to second disc is attached to retainer secured at second outer plate of housing. First plate of the housing has a stop installed on its surface and directed inside the housing. Stop and the support flange are installed with the possibility of limiting the movement of spiral springs. Bearing latch has a latch axis and two holders installed on the latch axis, in each of which a fixing bearing is fixed. Bearing latch has a coiled spring installed on the latch axis between the holders. On the outer side of the second plate of the housing there is a mechanical switch connected by a flag to the nearest holder. Movable contact control mechanism contains an additional box-shaped bracket rigidly connected to both plates. Retainer has the possibility of discrete adjustment of the pre-compression force of the spiral spring by turning it clockwise through angle of 30° with pitch 15° relative to the second outer plate. Retainer on the second outer plate of the housing has a hole coaxial to the regulator axis and is larger than the regulating axis in diameter.

EFFECT: creation of small-size vacuum load switch with increased switching and mechanical resource.

2 cl, 6 dwg