Copper busbars, also known as multi-phase copper busbars or copper busbars, are long conductors made of copper with a rectangular or rounded rectangular cross-section (rounded corners are now generally used to prevent point discharge). They serve to transmit current and connect electrical equipment in circuits. Copper busbars are widely used in electrical equipment, especially in complete sets of power distribution equipment.
Generally, copper busbars are used for the U, V, W phase busbars and the PE busbar in distribution cabinets. Copper busbars are usually marked with phase color letters or painted with phase color paint: U-phase copper busbars are painted yellow, V-phase copper busbars are painted green, W-phase copper busbars are painted red, and the PE busbar is painted with alternating yellow and green colors.