Protection device for copper bar connection

Abstract

The invention discloses protection device for copper bar connection. The protection device comprises a fastening bolt and a fastening nut, wherein the fastening bolt and the fastening nut connect thesame-phase copper bars, connection ends of the same-phase copper bars are vertically aligned and connected, protection sleeves are symmetrically arranged above and below two copper bar connection ends, a bolt groove is formed in an inner wall surface of each protection sleeve and is corresponding to the fastening bolt, and thermal shrinkage sleeves sleeve outer wall surfaces of the protection sleeves and the copper bars. In the protection device for copper bar connection, the thermal shrinkage sleeves are heated after the protection sleeves are arranged at the fastening bolt connected with thecopper bar, so that the service lifetime of the thermal shrinkage sleeves is prolonged by the protection sleeves, the phenomenon that the thermal shrinkage sleeves are excessively contracted and arepunctured by a tip of the fastening bolt after heat generation is effectively prevented, and unfavorable condition such as local discharging is also prevented.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a protective device for connecting copper bars. Background technique [0002] Copper bars, also known as copper bus bars or copper bus bars, are made of copper and play the role of transmitting current and connecting electrical equipment in the circuit. Copper bars are widely used in electrical equipment, especially complete sets of power distribution devices; generally, copper bars are used for U, V, W phase bus bars and PE bus bars in power distribution cabinets; copper bars are generally marked in use There are letter marks of the same color or painted with the same color paint, the copper bars of the U phase are painted with "yellow", the copper bars of the V phase are painted with "green", the copper bars of the W phase are painted with "red", and the copper bars of the PE busbar are painted Available in "yellow and green" bi-color. [0003] Among ...

AI Technical Summary

Problems solved by technology

[0003] Among them, when the existing copper bars are installed and connected, the connecting ends of the copper bars of each phase are aligned up and down, and then bolts and nuts are used to fasten the connection. Finally, the outer surface of the copper bars is covered with heat shrinkable tubes for insulation protection; however, when the electrical cabinet is working The rise in temperature will shrink the heat-shrinkable tube. When the heat-shrinkable tube shrinks to a certain extent, the place in contact with the fastening bolt will be easily damaged, which will affect the insulation effect.

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