Due to the complexity of power distribution and the increasing capacity of power supply systems in modern Chinese high-rise commercial and residential buildings, we have increasingly high requirements for the reliability and economy of the distribution backbone network. The requirement is that society has a significant transmission capacity and the ability to calculate short-circuit loads; Low voltage drop and minimal loss of power quality; Power supply network security, reliable insulation, and good fire resistance; High elasticity and good seismic resistance; Easy to branch, convenient for construction management and maintenance; Small market space and low cost. The main forms include: plug-in bus duct, prefabricated branch cable, ordinary power cable, etc.

The plug-in enclosed busbar trunking distribution management method has been widely used in high-rise enterprise buildings. The types of enclosed bus ducts can be divided into three categories: relative three wire system, three-phase four wire system, three-phase five wire system, etc. According to the insulation treatment method, they can be divided into ambient air insulation material, dense type, and composite material. Insulation type, high-strength type, etc. The rated current for employee work is 250A to 5000A. The main economic structure consists of steel plate bent shells, conductive copper (aluminum) bars, insulation materials, and research accessories related to learning. It uses dedicated plug-in terminals to directly insert into transformers or low-voltage distribution cabinets. Bus ducts with sockets can be conveniently analyzed for important branch system circuits and led to floor distribution boxes through plug-in boxes or plug-in switch boxes. Compared with traditional cable distribution management methods, enclosed busbars have the advantages of high information transmission current, compact structural design, convenient tap and distribution, high insulation strength, dynamic stability and safety performance requirements, and long service life. Commercial and residential buildings have replaced cables in high current distribution and have been widely researched and adopted. Compared with traditional cable distribution management methods, enclosed busbars have the advantages of high information transmission current, compact structural design, convenient tap and distribution, high insulation strength, dynamic stability and safety performance requirements, and long service life. Commercial and residential buildings have replaced cables in high current distribution and have been widely researched and adopted. Compared with traditional cable distribution management methods, enclosed busbars have the advantages of high information transmission current, compact structural design, convenient tap and distribution, high insulation strength, dynamic stability and safety performance requirements, and long service life. Commercial and residential buildings have replaced cables in high current distribution and have been widely researched and adopted.

But it also has some shortcomings, mainly including the following points:

1. The quality of enclosed bus duct installation projects directly affects the management functions of enterprises. Multiple installation steps, high requirements, and long construction period;

2. After the bus is plugged in, it is necessary to use a pressure plate to design positioning, tighten it, and then tighten the through bolt. There are not many branch joints, resulting in many different faults and problems.

3. The environmental requirements for installation and use are high, and the air must be kept clean, moisture-proof, and corrosion-resistant;

4. When installing enclosed bus ducts, fixed working methods such as spring brackets are used to increase their flexibility and seismic resistance, making the structural design of the enterprise more complex;

5. The comprehensive unit price is higher; The solution of three-phase five wire system is not satisfactory because the PE line must have reliable grounding continuity and not allow too many joints, while the bus duct cannot achieve this.

Bus duct is the main power line of this project. Once some problems arise, analysis will have a significant impact on them. He is involved in the loss of electrical energy, the impact of voltage drop on equipment, and potential safety hazards. Therefore, quality control of bus ducts is very important for us.

1. Design: Design engineering company. At present, most enterprises in China only have three-phase four wire or three-phase five wire current for project management. Some projects have improved the level of intellectual property protection. The company's security information technology clearly needs to be written on the drawings to prevent technical parameters from causing difficulties in project settlement and reduce network security risks.

2. The user has been selected by the manufacturer for mandatory national certification of the busbar trunking for many years, and the certificate has been updated. After the new standard version in 2006, 3C certification moved towards social norms. The National Certification and Accreditation Administration and the China Education Quality and Safety Certification Service Center have their own announcements on some products' 3C certificates and 3C testing research reports. The main information technology parameters are used to review the production and operation qualifications of enterprises. Review whether the company's development and production can ensure product quality from the following aspects: a. Certification of bus duct 3C certificate and testing research report can reflect whether the company has passed the certification of the company's product technology and current specifications, to determine whether it can meet project management needs. Review of technical content: ① ② Current specification protection level IP ③ Short circuit withstand strength ICW=KA ④ Smoke or flame spread public busbar capacity closure ⑦ Fire resistance protection circuit continuity busbar or busbar ⑤⑥ Conductor temperature rise, etc. If the above data technology 7 meets the requirements of enterprise technology development, the certified product design can be used with confidence. b、 Production quality control audit. Inspection: For conductor inspection, whether there is an instrument for measuring the resistivity of the conductor on the busbar conductor, whether there is a voltage testing device on the busbar, whether there is a temperature L testing equipment for the busbar current cutting ability, and whether the testing equipment protects the continuity of the circuit. These devices are directly related to the qualification rate of the manufacturer's products. If these factors exist, the management of testing equipment can provide effective basis for ensuring the quality and safety of the company's products and services. c、 Conductor review and testing. The conductor specifications of bus ducts are discounted by 15-20% compared to the development of current carrying capacity at an ambient temperature of 40 ℃ in the electrical engineering manual, and bus ducts with poor heat dissipation in structural design are discounted even more. If there is a discrepancy in the analysis and calculation of the current carrying capacity of the busbar, it is recommended that we conduct a validation model test on the temperature rise limit.