A double-break vacuum single-busbar combined electrical appliance

Abstract

The invention provides double fracture vacuum single bus combined electrical apparatus which solves the problems that the prior art is complex in structure, large in size, poor in heat dissipation performance, ultrahigh, adverse to transportation, high in requirement for concentricity between sliding electric conductors of three-position switches, an isolation electric conductor and a grounded electric conductor, and high in manufacturing difficulty. The double fracture vacuum single bus combined electrical apparatus is characterized in that isolating partition plates are welded between every two tank body sections of a sectional type steel tank to form a left three-position switch gear room, a right three-position switch gear room and a vacuum chamber, wherein the vacuum chamber is located in the same horizontal line as the left three-position switch gear room and the right three-position switch gear room; Y type movable electric conductors are vertically installed below a left static electric conductor and a right static electric conductor respectively. The double fracture vacuum single bus combined electrical apparatus has the advantages that the vacuum chamber is used as an arc extinguish chamber, the Y type movable electric conductors are for forming double fractures, an arc extinguish chamber porcelain bushing is eliminated, epoxy resin is not needed for fixation and insulation, therefore, the structure is simple, the size is small, the heat dissipation performance is good, transportation is facilitated, and the manufacturing cost is reduced; the structure of the left three-position switch gear room, the right three-position switch gear room and the vacuum chamber is more stable; moreover, the safety performance is high due to the fact that the three-position switches both have ground connection and isolation functions.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical appliances, in particular to a double-break vacuum single-busbar combined electrical appliance. Background technique [0002] The prior art double-break vacuum single-bus combined electrical appliance adopts a horizontal vacuum circuit breaker. Since a three-position switch is installed on the top of the tank body of the horizontal vacuum circuit breaker, and a bushing is installed on the top of the three-position switch, the structure is complicated. Large size and high cost, especially the distance between the bushing terminal and the mounting frame is relatively large, which makes the height of the single bus combination electrical appliance high, which is not conducive to transportation; in addition, the sliding conductor in the three-position switch is either inclined Or vertical, the concentricity requirements of the sliding conductor, the isolation conductor and the groundin...

AI Technical Summary

Problems solved by technology

[0002] The prior art double-break vacuum single-bus combined electrical appliance adopts a horizontal vacuum circuit breaker. Since a three-position switch is installed on the top of the tank body of the horizontal vacuum circuit breaker, and a bushing is installed on the top of the three-position switch, the structure is complicated. Large size and high cost, especially the distance between the bushing terminal and the mounting frame is relatively large, which makes the height of the single bus combination electrical appliance high, which is not conducive to transportation; in addition, the sliding conductor in the three-position switch is either inclined Or vertical, the concentricity requirements of the sliding conductor, the isolation conductor and the grounding conductor are relatively high, the manufacturing difficulty is relatively large, and the cost is relatively high. The vacuum insulated switch disclosed by the publication number US2001 / 0062117A adopts a double-break circuit breaker , but its structure is composed of 2 moving contacts and 2 static contacts with double fractures, and the 2 fractures are placed in the porcelain sleeve, and shielding covers are welded at both ends of the porcelain sleeve, and the static conductor is connected to the bus bar and passed through Epoxy resin is poured into one body, so the structure is complex, the volume is large, the heat dissipation is poor, and there is only a grounding switch, no isolating switch, no obvious isolation fracture can be formed, and the safety is poor

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