Copper braided wire, copper busbar, and copper cable have the same function. They can all be used as copper wires for connecting various equipment, especially some high-voltage power transmission equipment. So who knows which of these three products has a stronger current carrying capacity? And why do they all need to be tinned?
The reason for tinning copper braided wire, copper busbar, copper cable, etc. is mainly to prevent copper oxidation. Although copper itself has good conductivity, it is easy to oxidize, which will affect conductivity. Therefore, silver or tin plating is generally used to prevent copper oxidation, but silver is more expensive, so tin plating gradually replaces silver plating as a trend.
The current carrying capacity of copper braided wire, copper busbar, and copper cable is related to many factors, such as short distance and small load. The wire cross-section is selected according to the heating conditions. The heating conditions of the wire are used to control the current. The smaller the cross-sectional area, the better the heat dissipation, and the greater the current passing through the unit area.
For long-distance and medium-load, on the basis of safe current carrying capacity, it is necessary to select the cross-section of copper braided wire, copper busbar, and copper cable conductor according to the voltage loss condition. For long-distance and medium-load, it is not enough to just not heat up. Voltage loss must also be considered. The voltage to the load point must be within the qualified range so that the electrical equipment can work normally.
When under heavy load, it is necessary to select according to the economic current density on the basis of safe current carrying capacity and voltage drop. At the same time, the power loss must also be considered. The power loss and capital investment must be within a reasonable range. In order to ensure the long-term continuous operation of the wire, it is also necessary to determine it based on comprehensive factors such as the extreme temperature, cooling conditions, and laying conditions of the core wire use environment of the wire.
In general, the copper braided wire has a stronger conductivity when the distance is short, the cross-sectional area is small, the heat dissipation is good, and the temperature is low. The upper limit of the safe current carrying capacity is selected; while the copper braided wire has a weaker conductivity when the distance is long, the cross-sectional area is large, the heat dissipation is poor, the temperature is high, the natural environment is poor, etc., and the lower limit of the safe current carrying capacity is selected.
