1. Meet safety requirements
The Energy-saving copper-clad aluminum tube busbar reduces the conductor temperature rise from 50K to 30K under the rated current, and when the ambient temperature reaches 60°C, it meets the safety requirements of the insulating material operating temperature of 90°C.
The production method of the copper-clad aluminum tube busbar is to first build an aluminum tube in the copper tube, and then expand the diameter through the aluminum tube, so that the outer wall of the aluminum tube and the inner wall of the copper tube are pressed together and mechanically overlapped. The copper tube and the aluminum tube are two relatively independent. , layered two conductors.
The copper clad aluminum tube is composed of T2 conductor (silver copper alloy) and 6063 aluminum alloy, and there is no electric corrosion phenomenon.
The copper-clad aluminum tube busbar structure makes the skin effect of the copper tube and the aluminum tube echo inside and outside, which increases the effective cross-section of the overall flow, thereby reducing the AC resistance. At the same time, this structure improves the current density uniformity of the busbar conductors, offsets the large skin effect of the single-tube conductors, increases the overall skin depth, increases the conductor current carrying capacity, and improves the utilization efficiency of materials. Lower the temperature to 30K.
The reduction of temperature rise can improve the current carrying capacity, ensure the reliability of bus power supply, and achieve the purpose of reducing line loss and saving energy. The temperature rise is reduced, the insulation is not carbonized, and the insulation life of the busbar is guaranteed to meet the 30-year maintenance-free requirement.
⒉ Improve the insulation level
1) Improve the power frequency withstand voltage time. From 1min to 5min (500%), increase the power frequency withstand voltage time, highlight the possible defects of the insulating tube busbar in the production and installation process, avoid the defective busbar from being put into operation, prevent accidents, and ensure maintenance-free operation.
2) Improve the power frequency withstand voltage value. The outer diameter of the conductor of the insulating tube busbar is several times larger than that of the cable, the electric field strength is several times larger, the weight is several times larger, and the chance of damage during transportation, installation and operation is also several times larger. The hidden danger of insulation is highlighted, so that the defective busbar can be prevented from being put into operation and accidents can be prevented.
