A solid insulating switch integrating circuit breaker and isolating switch

Abstract

The invention discloses a breaker and disconnecting switch integrated solid insulated switch. A breaker and a disconnecting switch are included, the breaker comprises a breaker body and a breaker operation mechanism, the disconnecting switch comprises a disconnecting switch body and an operation mechanism of the disconnecting switch, the breaker body and the disconnecting switch body are mainly composed of vacuum explosion chambers respectively, the two vacuum explosion chambers are connected in series via a flexible connection conductor, the breaker operation mechanism uses a single-coil permanent magnetic mechanism, and the operation mechanism of the disconnecting switch as well as a connection structure between the operation mechanism of the disconnecting switch and the vacuum explosion chamber of the disconnecting switch are of linearly advancing structures. According to the invention, the two vacuum explosion chambers and other live-line parts are sealed in an insulated case, there are no live-line parts in the whole switch, full insulation is realized, a three-phase separated design is used, phase-splitting insulation is realized, possibility of faults between the phases can be avoided thoroughly, operation is safer and more reliable, and the size of the switch is smaller.

Description

technical field [0001] The invention relates to a solid insulation switch integrating a circuit breaker and a disconnector, belonging to the field of high-voltage electrical appliances. Background technique [0002] At present, the mainstream products of 12KV ring network cabinets in power systems are mainly SF6 gas-insulated ring network cabinets, and SF6 gas is one of the six greenhouse effect gases listed in the "Kyoto Protocol". It is undoubtedly necessary to reduce or stop the use of SF6 gas It has a positive effect on reducing greenhouse gas emissions and mitigating climate warming. [0003] The gas-insulated ring network cabinet is characterized by enclosing the switch and related live parts in the SF6 gas box as a whole, using SF6 gas as the arc extinguishing medium, and at the same time as the insulating medium between the phases of the charged body and the relative ground. The chemical properties of SF6 gas are very stable, with excellent insulation performance an...

AI Technical Summary

Problems solved by technology

Since the phases and phases are insulated with air, the conductive parts are exposed to the air and are inevitably affected by changes in temperature, humidity and altitude, posing potential safety hazards

At the same time, there is also a hidden danger of phase-to-phase short circuit

In addition, most of the existing solid insulated switches are operated by a spring mechanism, and the spring mechanism has its own inherent weakness

In order to meet the requirements of circuit breaker characteristics, nearly 200 parts are designed for the spring mechanism, and the precision requirements for many parts are high. Often, the function of the whole mechanism will fail due to a small part, and the reliability is difficult to further improve.

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