On-column circuit breaker with built-in isolation switch

Abstract

The invention discloses an on-column circuit breaker with a built-in isolation switch, and belongs to the technical field of intelligent power distribution equipment; the on-column circuit breaker comprises a circuit breaker, an isolation switch, a secondary element and a transmission mechanism used for completing opening and closing of the circuit breaker and the isolation switch which are arranged in the same closed box body, wherein the circuit breaker comprises a three-phase primary conductor and an arc extinguishing chamber of the three-phase primary conductor; after arc extinguishing chamber passes through a sealing pole column, the arc extinguishing chamber is connected with an isolation switch contact through a small pull rod and is integrally sealed by an independent insulating box; a partition plate which is sealed with the inner wall of the box body is arranged in the box body to separate the primary conductor and the secondary element from the transmission mechanism; and the arc extinguishing chamber is in linkage with an isolation insulation pull rod of the transmission mechanism; and sealing treatment is carried out on the connection position of the isolation insulation pull rod for penetrating through the partition plate and the partition plate. By virtue of the on-column circuit breaker with the built-in isolation switch, the hidden danger that an existing vacuum circuit breaker has a fracture induction voltage defect and an external isolation electrified body is exposed can be solved, the service life of the isolation switch and the service life of the circuit breaker are consistent, and the whole maintenance-free is realized.

Description

technical field [0001] The invention belongs to the technical field of high-voltage intelligent power distribution equipment, and in particular relates to a pole-mounted circuit breaker with a built-in isolating switch. Background technique [0002] The whole society is constantly strengthening the construction of intelligent distribution network, comprehensively improving the reliability and power supply quality of the urban distribution network. The use of outdoor disconnectors and pole-mounted circuit breakers has become the most widely used electrical equipment in the power system. Urban power distribution construction It is required that the conductor cannot be exposed, the wire is a sheathed wire, and the switch on the column adopts a cable outlet, but the current isolating switch is still a bare charged body. [0003] There are a lot of isolating switches in operation in the power system, but due to the influence of environmental pollution, manufacturing process, main...

AI Technical Summary

Problems solved by technology

It is only physically realized that the isolating switch is built into the circuit breaker, and there is no structure for the insulation protection between the primary conductor and the secondary element and the mutual protection between the circuit breaker and the isolating switch, and the practicability and safety are serious. insufficient

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