Copper bars are used as busbars in high-voltage switchgear cabinets and as power transmission media between components such as switches and contacts. The copper bar connects various charged bodies together to form a closed power distribution circuit. Low-voltage switchgear also uses copper bars. When the line current is low, aluminum bars will also be used instead of copper bars.

Classification of copper bars: According to process and appearance, copper bars can be divided into various types, including brass, red copper, rounded corners, right angles, and tinned copper bars. Brass is made of a copper zinc alloy, with a copper content of between 62% and 65%, and poor electrical conductivity. Red copper is a high-purity oxygen-free copper with a copper content of over 99.95% and good electrical conductivity. In order to ensure that faults such as short circuits do not burn out the equipment, the specification of copper bars is usually designed too large in the design stage. Many manufacturers use this to select inferior copper bars, which have poor electrical conductivity and ensure normal operation of the equipment. Once a fault occurs, it directly burns out all the equipment, causing significant losses.

Standard for copper bars: Copper is a conductive metal second only to gold and silver, so the copper content determines the conductivity of the copper bar. The copper bar in the electrical industry should be high purity oxygen free copper bar, which is also known as "red copper bar.". The color of red copper row is purplish red, also known as red copper, while brass is bright yellow. Generally, in order to prevent the surface of copper bars from rusting and producing copper green, a layer of tin is plated on the surface, which looks smooth and bright. When copper bars are used in high-voltage switchgear cabinets, they are usually made into rounded copper bars to ensure the safety of operators. The rounded copper bar has a smooth appearance and does not generate tip discharge, making it safer. The copper bar in the high-voltage switch cabinet is a tinned round copper bar, which is safe.