Dense busbar trunking has a huge amount of energy passing through and short circuiting during operation.Under the action of high thermoelectric power,dense busbar trunking must choose materials reasonably,and the cross-sectional shape and cross-sectional area should meet the requirements of safe and economic operation.Within the scope of use,it is particularly prone to catching colds at different altitudes,ambient air temperatures,and air cleanliness.When we use this type of bus duct,we must grasp the limited conditions of its advantages.When the temperature is low,a higher relative humidity is allowed,but temperature changes should be considered.

　　Dense bus ducts may occasionally produce moderate condensation,with a pollution level of level two,ensuring that the air relative humidity is not greater than 95%and there is condensation and mold in the area.Dense busbar trunking can be used for AC three-phase three wire,three-phase four wire,and three-phase five wire systems,with a frequency of 50-60Hz,voltage up to 400V,and rated working current of 250-5000A.It is mainly used as a new type of power supply and distribution equipment in industrial and mining,enterprises,and high-rise buildings.The installation of dense busbar trunking can be directly connected from the transformer to the low-voltage distribution cabinet,or directly connected from the low-voltage cabinet to the distribution system as a distribution main line.

　　Bus ducts with sockets can be easily connected to power supply branches through plug-in head boxes or switch boxes.Compared with air bus structures,dense bus ducts have the advantages of smaller volume and less space occupation.The voltage drop index of transmission lines mainly depends on the resistance,capacitance,and induction resistance of the transmission lines.The compact structure of dense bus ducts greatly reduces the impedance of the bus system,while the non-magnetic aluminum magnesium alloy shell avoids hysteresis eddy currents,resulting in a very small voltage drop of the entire system and very low energy consumption of dense bus ducts.

　　When selecting bus ducts under different environmental conditions,different types and materials of bus ducts should be considered,and the cross-section of various bus ducts should usually be selected based on long-term operating current.Check the short-term thermal stability and dynamic stability of dense bus ducts under high short-circuit current conditions.Due to the proximity of resistance and multiple conductors to alternating current,dense bus ducts generate heat when passing current.The allowable temperature for bare copper and aluminum bus ducts is 70℃,but when the contact surface is reliably covered with tin,the temperature can be increased to 85℃.