Casting type medium and high voltage busway with multiple insulation structure

Abstract

The invention provides a multi-insulation-structure pouring type middle-high voltage bus duct. The bus duct comprises conducting bars (1), insulation films (2), glass fiber reinforced plastic shells (3) and a pouring bus duct (4). The outer surfaces of the conducting bars (1) are coated with the insulation films (2), the outer surfaces of the insulation films (2) are coated with the glass fiber reinforced plastic shells (3), the conducting bars (1) coated with the insulation films (2) and the glass fiber reinforced plastic shells (3) are placed side by side, composite resin is poured, and the integrated pouring bus duct (4) is formed through the conducting bars (1) placed side by side. The twisted glass fiber reinforced plastic shells are tightly attached to conductors, the composite resin is poured, resin of the twisted glass fiber reinforced plastic shells and the composite resin are both resin composite materials and good in integration, when the bus duct is heated and expands, the buffering effect is achieved through the glass fiber reinforced plastic shells in expansion caused by temperature conduction between the conductors and the poured composite resin, the problem that stress is generated due to the heat expansion difference in the resin bus duct pouring process is solved, and potential safety hazards are avoided.

Description

technical field [0001] The invention relates to a bus duct for electric power transmission or distribution, in particular to a cast type bus duct with multiple insulation structures. Background technique [0002] With the development of the economy, bus ducts are more and more widely used in low-voltage power supply and distribution projects, and the demand for medium and high-voltage transmission and distribution lines is also gradually increasing. For medium and high voltage bus ducts of 6kV ~ 35kV, most of the insulation structures Air-insulated common box bus. Due to the large volume, heavy weight, and large space occupation of the common box busbar, it brings great inconvenience to the installation. Therefore, there are also insulating types of busbars such as resin casting, cross-linked polyethylene module assembly, and lining insulating bracket recasting on the market. Groove to replace the common box bus. However, because the bus ducts of the above insulation struc...

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Problems solved by technology

[0004] In addition, the existing direct casting bus ducts, polyethylene module splicing bus ducts, and lined insulating brackets and then pouring bus ducts all have different degrees of strength problems. The reason is that the casting resin and metal conductors, the casting resin and molded insulation The poor bonding force and low strength of the bracket will also affect the overall insulation of the busbar in terms of structure; the colloidal sealing of the polyethylene module joints also has the problem of poor strength, which will also affect the insulation performance of the busbar. Absolutely safe and reliable, but at the same time, it cannot meet the requirements of large-capacity medium and high-voltage lines for deflection resistance and heavy bearing

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