Gas insulation switch device

Abstract

The invention discloses a gas insulated switchgear, including at least two isolation units and two earth units, breaker units connect with the isolation units and the earth units, and a shell contains insulating air and the breaker units, and the axis of the shell is in horizontal direction. The described two isolation units and the earth units are set on both sides of the breaker unit, which are the composite isolation-earth switch base on isolation function and earth function, and it achieves a mechanical interlock about the isolation function and earth function. The two isolation-earth switches are placed on each side of the two isolation-earth switch containers, and the top of each container vertically connects a metal airtight container and an insulation sleeve, and the insulation sleeve is set vertically. The isolation-earth switch connects to a conductor overhead through the insulation sleeve on the left and connects to a bus conductor of electricity overhead through the insulation sleeve on the right.

Description

technical field [0001] The invention relates to a switchgear for power transmission and distribution, in particular to a gas insulated switchgear (HGIS) which is placed outdoors and connects overhead power transmission lines and non-enclosed air-insulated busbars. Background technique [0002] The traditional gas insulated switchgear (see Figure 7) is arranged vertically with three bushings, the circuit breaker is arranged vertically, and the two current transformers are arranged separately from the circuit breaker. Three groups of disconnectors have two groups vertically arranged, one group Arranged horizontally, the grounding switch and isolating switch are independent components, which are operated by different mechanisms to realize the interlocking requirements of the isolating switch and grounding switch in the power system by electrical means. [0003] In the above-mentioned gas insulated switchgear, the circuit breaker is arranged vertically, and the two outlets of th...

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Problems solved by technology

[0003] In the above-mentioned gas insulated switchgear, the circuit breaker is arranged vertically, and the two outlets of the circuit breaker are not at the same height, which leads to the elevation of the position of the isolating switch, the quick earthing switch and the metal container on the left side of the circuit breaker, which leads to two The height of the side components is inconsistent, the appearance is not beautiful, especially the inspection and maintenance are inconvenient

Due to the vertical arrangement of the casing, in order to ensure the minimum insulation distance requirements between the overhead transmission line and the nearest busbar and between two busbars, the total length is unnecessarily increased, resulting in an increase in the number of parts and the amount of insulating gas. , needs to be disassembled and transported, and the on-site installation and construction of the substation has a large workload and a long cycle, and the cost is high

[0004] In the above-mentioned conventional gas insulated switchgear, since the circuit breaker and two current transformers are arranged in three containers, the types and numbers of containers increase, the connection surfaces increase, and the manufacturing cost increases.

In addition, since the grounding switch and the isolating switch are relatively independent, and are driven by different operating mechanisms and interlocked electrically, there are many parts, complex machinery, and large size and volume of the entire device, resulting in lower manufacturing costs. increased

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