Intelligent solid closed insulating fixed-type high voltage switchgear

Abstract

An intelligent solid closed insulating fixed-type high voltage switchgear comprises at least one base cabinet which is installed in case body. Each base cabinet comprises three phase vacuum arc extinguishing switch units and the like. Each phase vacuum arc extinguishing switch unit, an isolation switch unit and a grounding switch unit are arranged in an insulation shell. An external surface of the shell is coated with conductive metal which is used for grounding. A central section of right side of the shell is provided with a cable inlet and outlet seat. A right transverse plane of a cylinder pullover of the cable inlet and outlet seat is provided with several ring grooves. An external surface of the cylinder pullover is provided with annular convex edges. Left and right parts of bottom of the shell are respectively downwards provided with an circular sleeve and a bus connection pedestal. The annular convex edge is arranged out of the circular sleeve. An insulator cap is installed on the circular sleeve. An upper end surface of the insulator cap is provided with the ring groove. A lateral wall of the groove is provided with the ring groove. A lower transverse plane of the bus connection pedestal is provided with the ring grooves and the external surface of the bus connection pedestal is provided with the annular convex edge. The shell of the invention has good insulating property and small volume. And the shell can be used safely and is convenient for connection. Electrical equipment in the shell can operate safely.

Description

technical field [0001] The invention relates to a power transmission and distribution switch cabinet used in AC and DC power transmission and distribution networks, in particular to an intelligent solid closed insulation fixed high-voltage switch cabinet. Background technique [0002] At present, most of the existing technologies for manufacturing power transmission and distribution devices are air-insulated power transmission and distribution devices, which are bulky, consume a lot of raw materials, and occupy a large space. There is also a practice of using insulating materials to seal and block to improve the insulation strength. However, the difficulty of the process is increased, the manufacturing cost cannot be reduced, and there are some defects. In particular, the insulation problem of the externally connected port of the device has not been reduced in size and cost. For power distribution devices with small currents, a large number of power distribution devices with...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the existing technologies for manufacturing power transmission and distribution devices are air-insulated power transmission and distribution devices. This device is bulky, consumes a lot of raw materials, and takes up a lot of space.

There is also a practice of using insulating materials to seal and block to improve the insulation strength. However, it increases the difficulty of the process, cannot reduce the manufacturing cost, and has some defects, especially the insulation problem of the external connection port of the device. The size has not been reduced and the cost has been reduced.

For power distribution devices with small currents, a large number of power distribution devices with SF6 gas as the main insulation are currently used. Because the SF6 gas used is highly toxic after arc extinguishing, it is extremely harmful to humans and the climate. It is suitable for use in unventilated underground places and national defense strategic facilities, and is not suitable for use in high-altitude areas, and it is easy to leak. The metal air box is large in size, requires high sealing performance, and the processing technology is complicated, resulting in high cost of the box. Maintenance and testing It is more complicated. In recent years, although there has been a transmission and distribution switchgear using solid insulation, the insulation structure of this type of switchgear is mostly a mixed structure of solid insulation and air insulation. In extreme weather or special conditions, the safety of electrical equipment operation It is inconvenient to connect the housing with other metal connectors, and the volume of the housing is relatively large. Because some charged bodies are exposed and corroded by air and dust, it is easy to cause corrosion of the charged body, reduce the insulation strength, and cause personal injury and death accidents.

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