Cable installation is a whole process,while bus ducts need to be installed section by section,with each section weighing hundreds of kilograms.Many installation environments rely on manual movement,such as installing in vertical shafts of high-rise buildings with limited space and inconvenient installation.Plug in bus ducts themselves are delicate,afraid of collision and even have requirements for fastening bolts.Any hidden danger in any link will affect their normal work and service life in the future.The transportation and storage requirements for plug-in bus ducts before installation are very high.Bus ducts are afraid of moisture and corrosion,so maintenance should be carried out before installation,and annual maintenance and inspection should be carried out for future use.

　　Plug in busbar trunking uses high-purity oxygen free copper and aluminum alloy shell,which is expensive.Generally speaking,a busbar trunking with a current of 100A and a length of 3 meters costs nearly several thousand yuan,which is unaffordable for enterprises with low requirements.Therefore,busbar trunking is generally used in high demand working environments,such as mining,chemical,metallurgical,energy,transportation,etc.There is no unified standard for plug-in bus ducts,so each production company only produces its own series of products,which is quite troublesome for adjustment and transformation after installation.In addition,due to the different current levels and cross-sections of bus ducts,there is basically no interchangeability.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.

　　The connection of voltage distribution devices at all levels in substations,as well as the connection of electrical equipment such as transformers and corresponding distribution devices,mostly uses bare or stranded wires with rectangular or circular cross-sections,which are collectively referred to as busbars.The function of a busbar is to collect,distribute,and transmit electrical energy.Due to the enormous amount of electrical energy passing through the busbar during operation,it experiences significant heating and electrodynamic effects during short circuits.Therefore,it is necessary to select busbar materials,cross-sectional shapes,and cross-sectional areas reasonably to meet the requirements of safe and economical operation.Busbars are divided into hard busbars and soft busbars according to their structure.Hard busbars are divided into rectangular busbars and tubular busbars.

　　The busbar trunking system is an efficient distribution device for transporting current,especially suitable for the economic and rational wiring needs of increasingly tall buildings and large-scale factories.Bus duct,as a new type of distribution conductor,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 its safety and reliability.Traditional cables as transmission conductors can no longer meet the requirements in high current transmission systems,and the parallel use of multiple cables brings many inconveniences to on-site installation and construction connections.