As a new type of distribution wire,plug-in bus duct has emerged.Compared with traditional cables,it fully demonstrates its superiority in high current transmission.At the same time,due to the use of new technologies and processes,the contact resistance and temperature rise at the connection points of the two ends of the bus duct and the junction of the distribution port are greatly reduced.High quality insulation materials are also used in the bus duct,thereby improving the reliability of the bus duct and making the entire system more complete.The busbar duct utilizes air conduction for heat dissipation and dissipates heat through a tightly contacting steel casing,thus its heat dissipation performance is comparable to that of cables,and the cable heat dissipation performance is evident.

　　With the emergence of modern engineering facilities and equipment,the electricity consumption of various industries has increased rapidly,especially with the emergence of numerous high-rise buildings and large factory workshops.Traditional cables,as transmission lines,can no longer meet the requirements in high current transmission systems.The parallel use of multiple cables has brought many inconveniences to on-site installation and construction connections.The busbar duct has good heat dissipation performance,and the insulation materials of the cable(core insulation and outer insulation)are both insulation materials and thermal insulation materials.Therefore,when laying power cables in the cable tray,it is allowed to lay 2 layers,because heat dissipation is considered.

　　Bus ducts require almost no maintenance,and daily maintenance usually involves measuring the temperature rise of the casing and core bolts,as well as the temperature rise of the joints in the incoming box.If the core bolts are of grade 4.8,they need to be tightened regularly,while if high-strength bolts of grade 8.8 are used,they do not need to be reinforced regularly.Due to factors such as easy wear and tear,aging,and short lifespan,cables require regular inspection,maintenance,and even replacement.Bus ducts require almost no maintenance,and daily maintenance usually involves measuring the temperature rise of the casing and core bolts,as well as the temperature rise of the joints in the incoming box.If the core bolts are of grade 4.8,they need to be tightened regularly,while if high-strength bolts of grade 8.8 are used,they do not need to be reinforced regularly.Due to factors such as easy wear and tear,aging,and short lifespan,cables require regular inspection,maintenance,and even replacement.

　　The structure of the bus duct is that there is a certain distance between the conductor phases and the shell,which can achieve air insulation and double insulation with insulation materials.Air type bus duct is a traditional bus duct with a primitive structure.Although it provides double insulation,it has poor heat dissipation,low current carrying capacity,and a large volume.After the conductor is wrapped with insulation material,several phase conductive busbars are stacked without gaps,completely tightly attached to the shell,and insulated by the insulation material between the phases.Its characteristics are high current carrying capacity,faster heat dissipation,lighter weight,and compact size,saving space.At present,there is a high demand on the market and it is also a commonly used bus duct.