Copper-aluminum transition junction box for switch in front of meter

Abstract

A meter-front switch copper-aluminum transition junction box disclosed by the present invention comprises a reinforced insulation shell, a connection bolt, a connection nut and a connection sheet, the reinforced insulation shell comprises an upper shell and a lower shell, one end of the connection bolt sequentially passes through the lower shell and the upper shell and then is connected with the connection nut, the other end of the connection bolt tightly presses the lower shell, and the connection sheet is connected with the connection nut. A puncture blade is fixed on the upper shell and / or the lower shell, the puncture blade is arranged between the upper shell and the lower shell, the connecting piece comprises a copper end made of copper and an aluminum end made of aluminum, the aluminum end of the connecting piece is connected with the puncture blade, and the copper end of the connecting piece extends out of the reinforced insulating shell. The invention provides a copper-aluminum transition junction box for a meter-front switch. The copper-aluminum transition junction box can solve the problem that copper-aluminum joints of the meter-front switch of a user meter box are easy to burn out due to different materials of drop wires (aluminum) and binding posts (copper).

Description

technical field [0001] The invention relates to the technical field of power equipment maintenance tools, in particular to a copper-aluminum transition junction box for a switch in front of a meter. Background technique [0002] At the connection of the meter connection or the terminal of the user's electricity transmission, the connection is generally fixed by the connection screw, and the connection screw is very easy to cause the wire to be broken or the wire to be worn, which will cause the current to over-current, and even burn the meter and burn the wire. Such problems reduce the application life of metering, increase the cost of production and maintenance, and also lead to the problem of low reliability of power supply for users; at the same time, when the wires are mostly made of aluminum, the humidity in the external environment is high or in rainy days , When the surrounding is relatively humid, it will also cause problems such as copper-aluminum connection oxidati...

AI Technical Summary

Problems solved by technology

Copper-aluminum transition terminals are used to solve the problem of easy burning at the joints caused by the different materials of the settlement wire (aluminum) and the terminal (copper) of the front switch of the user's meter box. The disadvantages are also obvious: 1. Use copper In the process of aluminum transition terminals, the operator needs to operate the crimping tool to crimp one end of the copper-aluminum terminal, which requires that the power-off operation must be performed when using the copper-aluminum terminal, otherwise it will directly endanger the lives of the workers on site Safety

2. The operation of copper-aluminum transition terminals is complicated in the actual use process, which is not only time-consuming and labor-intensive, but also has slightly higher requirements for the crimping process. Careless operation may cause the following hidden dangers: 1. The stripping of insulated wires does not use special electric stripping Tools, manual stripping lead to damage to the aluminum wire, and even wire breakage after bending, causing heating hazards

2. Improper handling of the contact surface

3. When crimping the wire, the wire is not inserted into the bottom of the aluminum conductive tube of the copper-aluminum transition terminal, which reduces the contact area and the carrying capacity

4. The crimping die of the corresponding size is not used for crimping. The crimping die must be used to crimp the aluminum end of the copper-aluminum transition terminal and the wire when installing the compression type equipment clamp. The crimping process should meet the requirements of the contact resistance. Regulation

If the size of the mold is too large, it will cause poor contact between the wire and the clamp terminal, increase the contact resistance, and generate heat

Therefore, it is necessary to design a copper-aluminum transition junction box for the front switch of the meter box to solve the problem of easy burning of the copper-aluminum joints caused by the difference in materials between the landing wire (aluminum) and the terminal (copper) of the front switch of the user's meter box

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