Gas-insulated switchgear circuit breaker with three-position disconnecting switch

Abstract

The invention discloses a gas-insulated switchgear circuit breaker with a three-station disconnecting switch, and the circuit breaker comprises a vacuum circuit breaker and the three-station disconnecting switch; the vacuum circuit breaker is provided with a circuit breaker main shaft, and the circuit breaker main shaft is provided with bearings; the bearings are arranged at two sides of a metal support, a push rod a is arranged below the circuit breaker, a push rod b is arranged below the push rod a, a vacuum bubble moving rod is installed below the push rod b, outlet wire flexible connectors are installed on the two sides of the vacuum bubble moving rod, a vacuum bubble inlet wire contact is installed on the lower side of the vacuum circuit breaker, and the isolation switch is composed of an isolation switch main shaft, an isolation switch moving knife, an inlet wire flexible connector and an isolation switch grounding contact. The vacuum circuit breaker is simple and reasonable in structure, through the combination of the circuit breaker main shaft, the push rod a, the push rod b and the vacuum bubble moving rod, the transmission mode of opening and closing force of the circuit breaker is changed, meanwhile, the bearing is additionally arranged on the circuit breaker main shaft, friction force is greatly reduced, product precision is improved, and closing torsion is also reduced.

Description

technical field [0001] The invention relates to a circuit breaker for an inflatable cabinet with a three-position isolating switch, belonging to the technical field of medium-voltage switch cabinets. Background technique [0002] With the development of the national grid, the terminal power distribution capacity is getting larger and larger. The general SF6 inflatable cabinet circuit breaker switch is 630A, which can no longer meet the use requirements. Therefore, it is very necessary to develop a large-capacity 1250A, SF6 inflatable cabinet circuit breaker switch. At present, the switch 630A of the SF6 inflatable cabinet circuit breaker is distributed longitudinally. The opening and closing of the three vacuum bubbles is completed by rotating three plane cams on an insulating shaft. The matching mechanism of this design must have a large output. The torque can only be completed. If it is a 1250A SF6 inflatable cabinet circuit breaker switch, the torque required is even grea...

AI Technical Summary

Problems solved by technology

[0002] With the development of the national grid, the terminal power distribution capacity is getting larger and larger. The general SF6 inflatable cabinet circuit breaker switch is 630A, which can no longer meet the use requirements. Therefore, it is very necessary to develop a large-capacity 1250A, SF6 inflatable cabinet circuit breaker switch. At present, the switch 630A of the SF6 inflatable cabinet circuit breaker is distributed longitudinally. The opening and closing of the three vacuum bubbles is completed by rotating three plane cams on an insulating shaft. The matching mechanism of this design must have a large output. The torque can only be completed. If it is a 1250A SF6 inflatable cabinet circuit breaker switch, the torque required is even greater. Due to space constraints, it is impossible to increase the output of the torque by increasing the volume of the product. It is necessary to solve the problem of using a smaller torque to make the large capacity The problem of normal operation of 1250 circuit breaker

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