The PE wire of the bus duct is used for safety protection of this bus duct,in addition to all the accident currents of the power supply equipment of this line being dispersed from the PE conductor of this bus duct.Therefore,different PE conductor specifications are set according to different current specifications to ensure the dispersion of accident currents.Provide signals to the switch of the busbar to quickly cut off the power supply and quickly evacuate the accident current.Ensure the safety of individuals with low accident voltage.So when designing and selecting bus ducts,it is required to ensure the safety and stability of the power supply system.

　　The key technical indicator of busbar trunking is temperature rise.How to control the operation of busbar trunking under low temperature rise,and how to ensure that the products supplied by the busbar trunking manufacturer can operate at full load and achieve the required temperature rise are key issues.The continuity of the protective circuit is related to the PE line,and the cross connection of the protective conductor and two unit busbars to the PE line conductor busbar should reach 50%of the phase line,with an equivalent cross-sectional area.The continuity resistance of the protective circuit between the shell and the PE line is≤0.005 ohms.For units with jumper wires,the scattered conductor should not be less than the equivalent cross-sectional area of the protective conductor PE line.Detection and protection:Each current level of each circuit bus duct is equipped with a protective device,which is set at the connection head of each main unit.The over temperature alarm refers to the ambient temperature plus the temperature rise you set.

　　When the temperature of the bus duct reaches 91 degrees,the bus duct protection device starts to alarm and prompt maintenance.If the temperature continues to rise to the limit temperature,the limit temperature is the insulation selected for the bus.If the insulation material you choose is Class B,the limit temperature is set to 130 degrees,and a signal is transmitted when the temperature rises to 130 degrees.Pay attention to the action of the main switch of the busbar to cut off the power supply and ensure the safety of the busbar.Before installing the bus duct,the specifications and direction of the bus duct should be confirmed before installation.The products delivered by the bus duct manufacturer to the site must match the actual conditions on site before installation can be carried out.Unqualified products are not allowed to be installed;After the installation of the bus duct,civil construction can contaminate the bus duct.The distance between any side of the bus duct casing and the floor hole should be at least 5-10mm.When the bus duct passes through a wall,the bottom of the casing can be placed on the wall opening.

　　Waterproof steps are usually made next to the reserved holes in the bus duct.If it is done at the entrance,it will affect traffic.Resin cast bus ducts do not require waterproof steps.Electrical equipment mainly refers to transformers and distribution cabinets,which determine the starting point of busbar trunking installation.To ensure that the horizontally installed bus duct remains level,each unit of bus duct should have at least two brackets to avoid external forces caused by imbalance at the end of the bus duct.An anti shake bracket is installed at the junction of the bus duct to prevent the bus duct from shaking when inserting or removing the plug-in box.When the working temperature changes,the bus duct will undergo expansion and deformation.If the bus duct is connected to the bracket with a scratch,the bus duct will bend.