Definition and application scope of copper bar (copper bus)

Definition and application scope of copper bar (copper bus)

Copper bar is a large current conductive product, suitable for electrical engineering such as high and low voltage electrical appliances, switch contacts, power distribution equipment, bus ducts, etc. It is also widely used in metal smelting, electrochemical plating, chemical caustic soda and other large current electrolysis smelting projects. The electrical copper bar has the advantages of low resistivity and large bendability.

Copper bar, also known as copper bus bar, copper bus bar or copper bus bar, grounding copper bar, is made of copper material, long conductor with rectangular cross-section or chamfer (rounded corner) rectangle, made of aluminum material is called aluminum Rows, which play the role of carrying current and connecting electrical equipment in the circuit. At present, the quality requirements of copper busbars are implemented in GB/T 5585.1-2005 standard.

Because copper has better electrical conductivity than aluminum, copper bars are widely used in electrical equipment, especially in complete power distribution devices; generally A, B, C, N-phase bus bars and PE bus bars in power distribution cabinets Copper bars are used; copper bars are generally marked with phase-colored letters or coated with phase-color paint. Phase A copper bars are marked as "yellow", phase B is "green", and phase C is "red". , N-phase is "light blue" color, PE bus bar is "yellow-green" color.

Copper bars are mainly used in primary circuits (copper bars are used for high-current phase, neutral, and ground wires), and the connection of primary components with larger currents in electrical cabinets is copper bars, such as a row of electricity. The main busbar is connected between the cabinet and the cabinet. The main busbar is divided into the switch electrical (disconnector, circuit breaker, etc.) of each electrical cabinet is the branch busbar. The copper bars are tin-plated and bare copper bars. Generally, tin-plating and embossing treatment or conductive paste are added to the copper bar connection points in the electrical cabinet. There are heating shrink sleeve protection in the free space, and some are made of insulating paint. The most important consideration when using copper bars is the current-carrying capacity. Select the appropriate copper bar according to the current size. The screws at the connection must be tightened, otherwise the copper bar may be burned when the current is large.