Introduction to the use and installation method of high voltage busway

In our daily life, there will always be wires exposed. In this case, if it is crushed or exposed, it will easily damage the wires, causing other dangers such as electric leakage. At this time, it is necessary to have equipment to protect the wires. The busway is such a device. So, what are the specific uses of the high voltage busbar? How does it work? How to maintain the high voltage busbar? Now I will give you a solution.

High voltage busbar installation method

1. The busbar channel is installed horizontally. The distance between the two brackets is 5002500mm, and the vertical installation spacing is 6003600mm.

2. When installing vertically, the mounting bracket should be drilled with the side plate of the channel and fastened with M6-M8 bolts.

3. The installation and construction process should give priority to the construction plan from the feeder system to the trunk line to the branch line.

4. Basic sequence of closed busway installation: selected wiring direction → fixed bracket → four bolts are fastened between the slots → the busbar joint plate and the insulating pad are inserted between the phases → the single head bolt penetrates the insulating sleeve → the bolt penetrates into the busbar Pre-positioning holes → fastening at both ends → adding half-mounted upper and lower cover plates → fixing the channel to the bracket.

5, the installation of the channel bus, the beginning, the middle, the terminal and the channel housing should be reliably connected to the grounding grid of the electrical equipment. The channel outer shell of the insulating material shall be connected with a flat copper strip or a yellow-green phase cable on the grounding bolt between the two channels to ensure that the entire passage is connected to become a grounding system.

6. After the installation project, apply the shaking table before the power transmission to test the channel busbar phase insulation and grounding insulation resistance: 1 low voltage busbar channel is not less than 20MΩ; 2 for 6~10KV high voltage busbar channel insulation resistance is not less than 1200MΩ. The 35KV insulation resistance is not less than 3000MΩ.

7. Before the power transmission, the 6~35KV bus channel should be tested for 50HZ power frequency withstand voltage and DC leakage test.

8. In the bus passage that is put into operation, the busbar joint bolts should be tightened in three months to check the contact condition of the busbar joints.

9. The bus route to be commissioned shall be inspected at least once a year for the following items:

(1) Tighten the fixing bolts, especially the busbar joints, and observe whether the joints have a burning phenomenon caused by poor contact or overcurrent, and handle them.

(2) Shake the table to test the degree of insulation and check whether the insulation material is aging.

(3) The connection between the busway and the grounding grid; (4) It is clear that the inside and outside absorb the attached dust and condensate.

10. Matters needing attention: (1) Before the maintenance of the busway channel, the power distribution cabinet must be powered off first, and the “man-operated, strictly closed” signboard should be hanged. There should be special personnel supervision before the cabinet. (2) Before the start of maintenance work, it should be checked and discharged, and the grounding rod should be used to short-circuit the phase and reliably ground before operation.

11. Storage of busway: It should be placed in a dry and ventilated place indoors to prevent moisture, rain and snow from invading and prevent dust or foreign matter from entering the passage.

High voltage busway use

The use of high-voltage busway is the electrical connection between the transformer and the step-up transformer in the electrical connection between the transformer and the high-voltage switchboard, the power supply system of the large-scale factory and mine, the large-scale substation, and the self-supplied power plant of a large enterprise. Can be widely used in transmission systems below 10KV, less than 2000A.

Above, Xiaobian introduced the use of high-voltage busbars and introduced the working principle of high-voltage busbars in detail. I believe that everyone has a deeper understanding of high-voltage busbars. How to maintain the high voltage busway? Xiaobian gives you a detailed introduction to the seven points on how to maintain the high voltage busway. The installation procedure is very important. The subsequent maintenance is also an important factor in determining the length of use of the high voltage busway. We also need to do the follow-up maintenance of the high voltage busway.