Bus ducts have good heat dissipation performance,and the insulation materials of cables(core insulation and outer insulation)are both insulation materials and thermal insulation materials.Therefore,when laying power cables in cable trays,it is allowed to lay two layers more,because heat dissipation is considered.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.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.

　　Busbar duct accessories include plug-in box kits,plug-in interfaces,connectors,elbows,flange ends,cable entry boxes,busbar end seals,horizontal brackets,spring brackets,flexible connections,variable capacity joints,tees(T-joints),elbows(horizontal and vertical),expansion joints,which may not be used on every project.It depends on the situation.Low voltage dense busbar trunking consists of straight sections,elbows,tees,flanges,cable transfer boxes,terminal seals,and plug-in boxes.Connectors are generally included in the quotation for straight sections,although some manufacturers may quote separately.Straight sections,elbows,tees,flanges,cable junction boxes,terminal seals,plug-in boxes,connecting copper plates,insulation boards,insulation through screws.

　　Bus duct straight bus unit,in conjunction with bus direction changing joint,is used to transport power to electrical equipment.Plug in box,used to lead out power branches from the busbar.The starting busbar is a power supply introduction unit that can be directly connected to transformers or low-voltage distribution panels.Variable capacity section refers to the transition section when converting the capacity of the busbar.Expansion joint is a functional unit designed to absorb thermal expansion deformation caused by long-term operation.The intermediate inlet box is suitable for various occasions.Generally,in the case of a long busbar connection length,it will greatly improve the situation of large voltage drop loss from single end power supply to the end.Terminal cover,installed at the terminal of the busbar(or each branch),to prevent external contact with live parts.

　　The focus of busbar trunking is to improve the production process(such as improving the surface treatment process of conductors to enhance and protect the surface quality of aluminum conductor coatings)and to add related tooling equipment.Therefore,the advantage of aluminum conductor bus ducts over copper conductor bus ducts in terms of technology and economy is the key to their widespread promotion and application.Bus duct is a device that allows us to lay lines more easily,and it is only natural for it to be widely used by people.If the busbar of the double busbar connection fails,attention should be paid to the operation mode of the busbar protection during the fault handling process,and if necessary,the busbar protection should be temporarily stopped.