Introduction to installation and construction technology of dense bus duct

With the progress of construction work, more and more new materials, technologies, and equipment are being touched. As electrical professionals, it is necessary to prepare sufficient knowledge and fully utilize the functions of various new technologies and equipment. Among them, the busbar trunking has a compact structure, small volume, small equipment space occupation, convenient construction, high current carrying capacity, stable and reliable operation, less protection and repair, and saves investment. Therefore, its use has gradually become widespread. Therefore, the construction quality of bus ducts not only affects the normal operation of the entire power supply system, but also affects the daily lives of the general public and the normal production of factories. The following will propose a construction plan for the suspension equipment of busbar trunking.

(1) This construction plan uses a bus duct with reinforced shell treatment, which has the advantages of beauty, durability, high rigidity, and large bearing capacity; The use of hangers increases the contact area between hangers and busbars, with concise equipment technology and safe and reliable connections.

2. Scope of application

3. Process principle

(2) The selected hanger is reusable and equipped with steel plates for fixing the busbar trunking, which widens the contact area between the hanger and the busbar trunking, increases the equipment spacing of the hanger, reduces the number of busbar trunking joints, and reduces the amount of data required.

(1) Construction process flow (Figure 1)

Schematic diagram of reinforced bus duct east-west suspension system for lifting and preparation (see Figure 2)

(3) Operation precautions

① Review the scheme planning drawings, survey the construction site, summarize and consider the equipment roads, equipment elevations, and the orientation and specifications of embedded parts and reserved holes for the busbar trunking.

③ Provide technical briefing to the personnel of the busbar trunking equipment, informing them of the equipment methods and key points of the busbar trunking.

⑤ During the civil construction phase, carry out the construction of reserved holes and embedded parts.

⑦ Indoor bus duct equipment shall be installed after the completion of pipeline and air conditioning construction. If it is necessary to insert homework, the product protection work of the project should be done well.

Positioning and laying out

② According to the planning diagram and construction plan, find horizontal or vertical lines from the beginning to the end of the bus duct (main line first, branch line later) (if the building has a slope, the bus duct should follow the slope), recognize and mark the detailed orientation of the supporting structures.

① Hanger expansion bolt fixation

The error in drilling diameter shall not exceed+0.5mm to 0.3mm; The depth error shall not exceed+3mm; after drilling, the remaining debris in the hole should be cleaned.

After using a wooden hammer or a wooden block, use an iron hammer to knock the expansion bolt into the hole. After fixing the bolt, the head deflection value should not exceed 2mm.

① The hanger is manufactured by welding channel steel on the construction site.

After the hanger is manufactured, steel plates will be welded onto the hanger according to the planned and equipment recognized orientation. After welding the steel plate, it is necessary to carry out anti-corrosion treatment for the future hanger according to the planning requirements.

Hanger preparation

② The interval between the lifting brackets shall not exceed 4.5m.

Hanger preparation inspection

① The reinforced bus duct selected for this scheme is customized by the factory and has been treated with ribs before leaving the factory.

③ The straight sections, bends, accessories, supports, hangers, columns, and steel sections of various standardized bus ducts should have product certificates. The surface and interior of the bus duct shell and busbar should be smooth and flat, without sharp edges or distortion.

Equipment for busbar trunking

② The busbar trunking body should be securely connected using professional connection plates.

④ The equipment for busbar trunking must be robust and reliable, horizontal and vertical, without distortion or deformation, as shown in the attachment *.

⑥ The terminals of the bus duct should be sealed with dedicated terminal heads.

Grounding protection line equipment

② The metal casing for closing or plugging the busbar is only used as a protective casing and cannot be used as a protective grounding main line (PE line), but the casing must be grounded. Use a woven soft copper strip with a cross-sectional area of not less than 16mm2 between each section of the busbar to connect the busbar shells together as a whole.

Busbar duct debugging and power on