Anti-corona tubular busbar drainage wire clamp with split structure

Abstract

The invention relates to an electric power fitting and particularly relates to a split-structure anti-corona tubular bus drainage wire clamp used for a high-voltage-class transformer substation. The wire clamp comprises fitting bodies provided with a semi-arc accommodating cavity, wherein drainage wiring terminals are arranged at lower parts of the fitting bodies, fitting cover plates which are fixedly connected with the fitting bodies through bolts are provided with the semi-arc accommodating cavity, the number of the hardware fitting bodies and the number of the hardware fitting cover platesare two, a drainage wiring terminal is a cuboid, a left end and a right end of the cuboid drainage wiring terminal are provided with anti-corona cylinders, the two hardware fitting bodies are locatedat upper ends of the anti-corona cylinders, and anti-corona spheres are arranged at lower ends below the anti-corona cylinders. The wire clamp is advantaged in that the length of a contact surface along the axial direction of a tubular bus can be effectively reduced, compactness of contact with a tubular surface is increased, and large-current drainage is ensured; a corona initial voltage is improved, the electric field intensity is reduced, and corona is reduced.

Description

technical field [0001] The present invention relates to an electric power fitting, especially a split structure anti-corona tubular busbar drain clamp used in a high-voltage substation. Background technique [0002] In high-altitude areas, especially in ultra-high voltage substations of 330kV and above, tubular busbars are used more and more, and tubular busbar drainage clamps must be used to connect tubular busbars to equipment. At present, the connection between the tubular busbar and the equipment adopts the drainage clamp with an integrated structure. This type of clamp has a large shape and the contact surface when it contacts the tubular busbar is too long, which affects the compactness of the contact surface and leads to contact between the contact surface. The coefficient is small, which will affect the overcurrent capability and easily make the clamp heat. At the same time, bolt-type clamps are used in the equipment lead connection of tubular busbars with a voltage...

AI Technical Summary

Problems solved by technology

At present, the connection between the tubular busbar and the equipment adopts the drainage clamp with an integrated structure. This type of clamp has a large shape and the contact surface when it contacts the tubular busbar is too long, which affects the compactness of the contact surface and leads to contact between the contact surface. The coefficient is small, which affects the overcurrent capability and easily makes the clamp heat

At the same time, bolt-type clamps are used in the equipment lead connection of tubular busbars with a voltage level of 330kV and above, and the exposed bolts are prone to corona discharge

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