The dense bus duct shell serves as a PE line as a whole,with low reactance,good continuity of protection circuit,safety,reliability,and energy saving.The dense busbar trunking is a compact sandwich structure that uses electrolytic copper as the conductor and is coated with high-quality insulation material after being treated with new technology.The dense bus duct is limited by the shell plate and can only produce horizontal sections no larger than three meters.Due to the small air gap between the busbars,a strong electric force is generated when the busbars pass through high currents,causing the magnetic oscillation frequency to form a superimposed state and resulting in excessive noise.

　　The metal enclosed shell of the busbar duct can protect the busbar from mechanical or animal damage.It is safe to install it using plug-in units in the distribution system.The shell can be grounded as a whole,and the grounding is very reliable.However,the PVC shell of the cable is susceptible to mechanical and animal damage.When installing the cable,the power must be cut off first.If there is an error,it will be very dangerous,especially if the cable needs to be grounded on site.The unreliable grounding increases the risk.The busbar is composed of many sections,each of which is short and light in length.

　　Only a few people are needed to quickly complete the installation,and the busbar has many standard parts and inventory,which can be shipped quickly and save on-site work time.We can merge certain branch circuits by using bus ducts and convert them into a large bus duct using plug-in boxes.It can simplify the electrical system and obtain lower current values for more wires.Therefore,it saves the cost of the project and is easy to maintain.For traditional cable lines,cables make the electrical system extremely complex,large,and difficult to maintain,which wastes engineering costs and installation space.

　　Dense busbar trunking is suitable for AC three-phase four wire and three-phase five wire systems,with a frequency of 50-60Hz,rated voltage up to 690V,and rated working current of 250-5000A in power supply and distribution systems.The heat dissipation of dense busbar trunking mainly relies on the shell.Due to the compact arrangement and installation between wires,the rated current is reduced,the voltage drop is increased,and it is prone to heating.The energy loss of the circuit is high and it is prone to aging.The busbar is composed of many sections,each of which is short and light in length.The installation work requires the cooperation of many people and takes a lot of time to complete.