What are the technical characteristics of brass strip application? Rectangular copper bars have the characteristics of large width, small thickness, small cross-sectional area, and large surface area. Therefore, based on the current skin effect, the current carrying capacity is greater than that of standard rectangular copper bars with the same cross-sectional area. Compared with standard rectangular copper bars with the same cross-sectional area, the mechanical strength is relatively small, and the impedance of the busbar is relatively large. The impedance of the busbar increases the voltage loss on the busbar.
The manufacturer processes the brass strip very thin, thereby saving copper material usage and increasing current carrying capacity, which has a certain degree of technical rationality.
The copper bars in dense bus duct products are tightly stacked, and there is no air gap between the brass strips, which is more conducive to the heat dissipation of the copper bars. Under the same specification conditions, the current carrying capacity of the copper bars is greater than when exposed in the air. At present, there are no current carrying capacity standards for various specifications of copper bars used in dense bus ducts, which objectively makes it difficult to review whether the core materials of bus products are sufficient.
At present, there are two objective and recognized methods for reviewing brass and copper strip products: one is to review 3C certification and type test reports; The second is to immediately extract samples and send them to a third-party testing agency for testing.