Is the high voltage bus bar made of aluminium bus-bar or cop

Comparatively speaking, copper bus-bar is better arranged; compared with aluminum bus-bar according to the same length and section, the carrying capacity of copper bus-bar is larger than that of aluminum bus-bar. Because the resistance of copper is smaller than that of aluminium, the conductivity of copper is better than that of aluminium.

The conductivity of copper bars is much better than that of aluminium bars, but the bus price of copper bars is higher; the density of copper and aluminium conductors is 8.9g/cm3 and 2.7g/cm3; the conductivity of copper is only next to that of silver, with IACS value of 100% (international scale annealed electrolytic copper scale), IACS value of high purity aluminium (99.996%) and industrial pure aluminium (99.5%) being 64.94% and 59%, that is, the conductivity of copper is about 35% - 40% higher than that of aluminium. Copper has better chemical stability in the atmosphere and aluminium is more active, but adding trace alloying elements can improve its chemical stability. Copper bus-bar has better strength and hardness than pure aluminium bus-bar, but aluminium alloy can obtain higher strength and hardness after heat treatment. Because of its light weight, its strength is much stronger than copper.

Therefore, the technical and economic advantages of aluminium bus-bar groove compared with copper bus-bar groove are the key points for its wide application.