Live line connection method in low-voltage cable branch box

Abstract

The invention relates to the technical field of power meter installation and power connection. The invention provides a live line connection method in a low-voltage cable branch box. The method comprises the steps of (1) preparing a device for live line connection used in the low-voltage cable branch box, wherein the device comprises a first fastening screw, a device body, a second fastening screw, and a third fastening screw, a lower portion of the second fastening screw is screwed into a second threaded hole, a lower portion of the third fastening screw is screwed into a third threaded hole,(2) preparing the low-voltage cable branch box, (3) installing the device for live line connection used in the low-voltage cable branch box to a copper strip of the low-voltage cable branch box, and(4) inserting optical line ends of a power line into a first power line insertion hole and a second power line insertion hole in a live condition when the new power line is connected and then tightening the first fastening screw and the second fastening screw with an insulating screwdriver to fix the new power line to be connected to the device body. According to the method, the live line connection operation can be carried out without a power failure.

Description

technical field [0001] The invention relates to the technical field of electric meter installation and connection, in particular to a method for live connection in a low-voltage cable branch box. Background technique [0002] The structure of the low-voltage cable branch box is as follows: figure 1 As shown, the low-voltage cable branch box includes the box door, the first connecting screw, the low-voltage cable branch box body, copper bars, fixed horizontal bars, and the third connecting screw; the low-voltage cable branch box is a cavity, and the low-voltage cable branch box The left side and the right side of the body are respectively hinged with box doors, and a plurality of fixed horizontal bars are arranged in the cavity of the low-voltage cable branch box along the transverse direction, and the fixed horizontal bars are connected by the third connecting screw (or bolt) and the low-voltage cable branch box. The box body is fixedly connected, and a plurality of copper ...

AI Technical Summary

Problems solved by technology

[0003] There are the following deficiencies: 1. After the low-voltage cable branch box is powered and put into operation, when the metering device is installed again, it is limited by the small size of the live low-voltage cable molecular box and the limited safety distance between the live copper bars. The entire transformer or Only when the entire low-voltage branch line is completely stopped can it be safely connected to the electric meter of the new user. The shutdown of the transformer will cause a large-scale power outage and seriously affect the power supply.

2. The direction of the wiring in the daily low-voltage cable branch box is horizontal. Due to the influence of space, the safe distance between the phase sequences cannot be guaranteed, and there are great potential safety hazards. Clear, neat and beautiful requirements

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