Circular shielding insulating bus and machining method thereof

Abstract

The invention relates to a circular shielding insulating bus, which has the advantages of high carrying capacity, good heat dissipation, low temperature rise, strong electric insulation performance, no environmental disturbance and high reliability. The circular shielding insulating bus comprises a circular conductor and an outer layer sheath, wherein a plurality of insulating shielding layers are arranged between the circular conductor and the outer layer sheath and consist of insulating layers and shielding layers; each insulating layer comprises two polytetrafluoroethylene layers and a thermal shrinkage sheath from inside to outside; and silicone oil is uniformly brushed between the polytetrafluoroethylene and the thermal shrinkage sheath.

Description

Technical field [0001] The invention belongs to the field of high-voltage electrical appliances, and particularly relates to a circular shielded insulated bus. Background technique [0002] With the continuous development of the domestic economy, the power load of various substations has increased sharply, the operating current of the system has become larger and larger, the load has become more and more concentrated, and the main transformer capacity of the substation has become larger and larger. The connection method of multiple rectangular busbars or the direct use of cable connection, these are not well adapted to the working method of high current (above 3000A), and cause additional loss, uneven current distribution, and increased skin effect coefficient, resulting in current carrying Phenomena such as capacity decline and contact heating are becoming more and more obvious. [0003] The domestic bus bar has been technically improved, so that most of the insulation layer is w...

AI Technical Summary

Problems solved by technology

The disadvantage of the insulated busbar is mainly the insulation treatment of the intermediate connection. The insulation of the single pipe mother is done before leaving the factory. The intermediate joint is used for the docking of the single pipe mother and the single pipe mother on site. Insulation treatment of joints, but the humidity and temperature of the surrounding environment are impossible to match, and even impurities may be brought in when wrapping by hand, which greatly reduces the electrical insulation performance of the tube mother

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