A closed busbar trunking is a busbar system composed of metal plates as the protective shell,conductive bars,insulation materials,and related accessories.The enclosed busbar duct can be made into a plug-in type enclosed busbar with plug-in junction boxes at regular intervals,or a feeding type enclosed busbar without a junction box in the middle.Enclosed bus ducts can be divided into three types according to insulation methods:air type plug-in bus ducts,dense insulation plug-in bus ducts,and high-strength plug-in bus ducts.According to the structure and purpose of enclosed bus duct,it can be divided into dense insulation,air insulation,air additional insulation,fire-resistant,resin insulation,and sliding contact bus duct;According to the material of the enclosed bus duct shell,it is divided into steel shell,aluminum alloy shell,and steel aluminum mixed shell bus duct.

　　The abbreviation for enclosed bus duct is bus duct,which means that enclosed bus duct is the vest of bus duct,or bus duct is the vest of enclosed bus duct.Enclosed bus duct and bus duct refer to the same thing.A closed busbar duct is a busbar system composed of metal plates(steel plates or aluminum plates)as protective shells,conductive bars,insulation materials,and related accessories.It can be made into a plug-in type enclosed busbar with plug-in junction boxes at regular intervals,or a feeding type enclosed busbar without a junction box in the middle.Enclosed bus ducts can be divided into three types according to insulation methods:air type plug-in bus ducts,dense insulation plug-in bus ducts,and high-strength plug-in bus ducts.The structure and purpose of enclosed bus ducts are divided into dense insulation,air insulation,air additional insulation,fire-resistant,resin insulation,and sliding contact bus ducts.According to its shell material,it is divided into steel shell,aluminum alloy shell,and steel aluminum mixed shell bus duct.

　　The surface treatment of the conductive enclosed busbar enclosure in the enclosed busbar duct is an important task,which includes processes such as acid washing,phosphating,drying,powder coating,and curing.The shell coated with polyester epoxy powder has strong surface adhesion and can maintain insulation for a long time.The installation site of enclosed bus duct should not exceed an altitude of 2000m,and the surrounding air temperature should not exceed+40℃or lower than a fixed value.The average temperature of the product within 24 hours should not exceed+35℃,and the relative humidity of the air should not exceed 50%at 40℃and 90%at 20℃.The surrounding air is clean and free of corrosive and insulating gases from Egypt.

　　Enclosed busbar trunking is a product for high current power supply,generally used for connecting transformers and distribution cabinets,as well as for power supply systems with tree type wiring from the distribution center(distribution panel,cabinet)to the load(for power supply and distribution transmission,mainline power transmission,distribution,and supporting units such as incoming boxes and plug-in switch boxes,as well as overload,short circuit,leakage,undervoltage and other protection functions);The enclosed busbar trunking product is suitable for AC frequency 50HZ,system current level is usually 250-5000A,rated voltage is 400-1000V,protection level is IP40-IP65,and can be configured with three-phase four wire system and three-phase five wire system according to the number of conductors.Enclosed busbar trunking is mainly used as a new type of power supply and distribution equipment in industrial,mining,enterprise,and high-rise buildings.