Enclosed busway has been widely used in power plants, substations, industrial and civil power leads, and its emergence is a change in the traditional transmission technology. The following small series will give you a brief introduction to the closed busway installation method, go and see it together. Enclosed busway installation method First, the construction sequence Busway inspection→Measurement and positioning→Support and installation of hangers→Insulation test→Splicing of busbars→Phase check Second, the main construction methods and technical measures 1, bus slot inspection The quality of busway should be strictly inspected, focusing on the following: a. Busway housing should be complete and without damage. Busway and distribution box models and specifications meet the design requirements. Accessories are correct and sufficient in number. b. The connection surface of the busbar joint is flat, the connection hole is symmetrical, and the distance from the edge is the same. c. The insulation plate between the busbars cannot be cracked. d. Use 500V megger to measure the insulation between the phase-to-phase, phase-to-neutral row, PE row, and phase-to-shell of each busbar not less than 20 MΩ. The construction site should be cleaned and the on-site shelving time should be minimized. Do waterproof and moisture-proof work. 2, bus slot measurement and positioning a. The direction of the busway shall be comprehensively determined according to the design drawings and the actual project. The principle is not to conflict with large-diameter pipes and bridges. The principle shall be laid as far as possible along the shortest path of the straight line, and the distance to the ground shall not be less than 2.5m. The minimum clear distance from the surface of buildings, other electrical circuits and various pipelines is in accordance with the current national standards. b. The distance between horizontally installed busway supports and hangers is generally 2~3m, determined by the weight of each busway. Additional brackets shall be provided at the junction of the busway turn and the distribution box. 3, hanger production and installation a. The type of hanger is determined by the location and weight of the busway installation. Generally made of channel steel, angle steel, full-flute hanger and flat steel, and do anti-corrosion treatment. The distance between hangers is uniform, and the horizontality of the hangers should meet the requirements for the horizontal deviation of the busway. b. Vertical installation of the busway, generally using the shaping spring bracket of the busbar production plant. Busway Splicing a. When hoisting and splicing, care must be taken not to damage the busway. Apply nylon rope when hoisting. Use steel wire ropes must be covered with rubber or plastic casing. Fit the joints well to prevent debris and rubbish from falling into the joints. b. Assembling order can be arranged according to busbar arrangement and busbar slot number. When assembling, connect the insulation board to the mat, insert the insulation bushing and connecting bolt, add the washer, spring washer, and screw the nut by hand. Adjust the horizontality and verticality before tightening so that the horizontal and vertical degrees are not excessive. The total length error does not exceed 10mm. Tighten with a torque wrench to reach the specified value, and fashion upper cover and grounding strap (board). c. In order to prevent accidental factors, so that the insulation is reduced, in each section of the assembly connection, it is necessary to measure the insulation resistance again, and timely find the problem and deal with it in time. d. The spring on the spring bracket should be in a state of being able to flex freely. 5, phase check After the bus slot is completed, the phase check must be performed and the phase of the power system must be consistent. Enclosed Busway Installation Site Selection The enclosed busbar installation site cannot easily exceed the altitude of 2000m. The ambient air temperature is not higher than +40°C and not lower than 5°C. The average temperature of the product within 24 hours does not exceed +35°C, and the relative humidity of the air does not exceed 40°C. 50%, no more than 90% at 20°C. The surrounding air is clean and dust-free. Egypt erodes the insulating gas. The above is a brief introduction for Xiaobian. If you want to know more related information, please continue to pay attention to Qijia Consulting. More exciting consultation, please stay tuned. Indoor closed closed leisure balcony decoration design closed balcony closed living room balcony decoration design construction installation
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