Dense busbar trunking is suitable for AC three-phase four wire and three-phase five wire systems.The frequency of dense busbar trunking is 50-60Hz,the rated voltage is up to 690V,and the rated working current is 250-5000A for power supply and distribution systems.As an auxiliary equipment for power supply and distribution equipment in industrial and mining,enterprises,and high-rise buildings,dense busbar trunking is particularly suitable for the renovation of workshops and old enterprises.The dense busbar trunking system is an efficient distribution device for transmitting current,especially suitable for the economic and rational wiring needs of increasingly tall buildings and large-scale factories.

　　The dense bus duct joints are fastened with insulated bolts and connected with double copper bars,effectively increasing the contact area of the joints and greatly reducing the temperature rise at the joint locations.The dense busbar trunking is wrapped with flame-retardant cross-linked polyethylene heat shrink tubing,which has strong insulation performance and does not emit toxic gases when exposed to fire.The dense bus duct socket interface is flexible and convenient to set up,and can accommodate a large number of sockets.Dense busbar trunking has strong universality,and can be used without changing the power supply system when adjusting the position of electrical equipment.

　　The connection of the busbar is made of high-strength insulation board with high insulation,arc resistance,and flame retardancy as the connection accessory,which is fastened with bolts with insulation sleeves.According to the specifications,in order to meet the overlapping area of the busbars,the gap between bolt holes and bolts is small in the dense busbar trunking.Due to the addition of insulation sleeves to the busbar trunking bolts,the gap is narrower.Therefore,when connecting the main busbars of two bus ducts,the axis lines of the two bus ducts should be strictly kept on the same line,and the bolt holes of the busbars and insulation plates of the two bus ducts should be completely aligned.When tightening the bolts,each bolt should be tightened evenly in sequence.

　　To prevent the insulation sleeve on the bolt from being damaged by shear force during installation.In the process of engineering construction management,several cases were found where the insulation of the bus duct was reduced due to the stress damage of the bolt insulation sleeve.The grounding connection adopts a busbar shell that can meet the grounding requirements,but when the busbar shell is completely sprayed,the two sections of the busbar trough must be connected with grounding bolts using wires.Dense busbar trunking should undergo insulation inspection before and after installation,and a comparative check should be conducted to determine if the insulation of the busbar trunking has decreased due to installation quality issues.