The accuracy of the installation of enclosed bus ducts is related to the safety of future electricity use,so more attention should be paid during the construction process.The transportation method adopts manual transportation,and the hoist and hand hoist are used in conjunction with lifting.The installation of enclosed bus ducts,regardless of copper or aluminum conductors,shall be based on their rated current and rated sub items.The enclosed bus duct every 10 meters is considered to contain three straight sections and one bend.

　　The grounding jumper between each section of enclosed bus duct is already included in the quota and should not be calculated separately.When the specification design of the grounding busbar does not meet the requirements of the quota,it can be converted.The fixing methods of various control(distribution)panels,cabinets,and foundation channel steel are considered comprehensively in the quota.Regardless of whether it is connected to the foundation using bolts or welding methods,no adjustments will be made.If the connection of cabinets,screens,and busbars does not match the hole spacing or there are no holes left,it can be calculated separately.The enclosed busbar can withstand voltage.Generally,when designing the busbar,it is required to withstand an AC power supply of 3000 volts and 50 hertz within one minute without breakdown or flashover during this period,which is qualified.

　　The impedance characteristics of dense busbars and enclosed busbars are relatively difficult.The thermal index of dense busbars is small,and heat transfer is limited to convection,radiation,and conduction.The protection level determines that the busbar system must be completely enclosed,so there is no implicit phenomenon in convective heat transfer.The static air medium between enclosed busbars determines its transmission mode as"radiation",and the thermal"conduction"between metals is inevitably superior to the thermal"radiation"of gas media.In addition,the thermal conductivity of aluminum magnesium alloy shell material is much better than that of steel shell material.The sandwich structure of dense buses has obvious advantages over the grid structure of air buses in terms of small volume and space occupation.

　　When designing the connection of enclosed busbars,double-sided connection technology should be used to appropriately increase the total cross-sectional area of the conductor,in order to improve its current carrying capacity.When designing plug-in interfaces,attention should be paid to silver plating on the conductor part to ensure that the plug-in box connection of the enclosed bus duct has low impedance characteristics and will not change due to temperature rise.The enclosed bus duct requires interlocking protection to prevent the door of the socket box from suddenly opening when powered on.It is important to know that without reliable and secure sockets,bus duct sockets cannot be closed.The enclosed bus duct should also have anti electric shock protection for the insertion box.It charges internally.Therefore,in order to avoid the risk of electric shock,transparent protective zones must be set up to ensure personal safety.