Comprehensive analysis of Electrical bus bar: materials, characteristics, applications, and answers to core questions

In the power industry, the selection of Grounding copper busbars is based on high-purity copper, and the mainstream grades are divided into two categories: T2 electrolytic copper and TU1/TU2 oxygen free copper. Among them, T2 electrolytic copper has a purity of not less than 99.90%, outstanding cost-effectiveness, and is the most widely used category, suitable for most scenarios such as busbar, busbar, Earthing terminal copper busbar kit, etc. TU1/TU2 oxygen free copper focuses on low loss, high temperature resistance, and is suitable for high voltage, ultra-high voltage cables, and high-frequency equipment with higher performance requirements.

The form of Ground bus bar is divided into soft and hard states. Soft state purple copper has good ductility after annealing treatment and is used for cable cores and soft connections; Hard purple copper, after cold processing, has high strength and is used for overhead stranded wires and hard busbars. In addition, copper busbar, also known as copper busbar, is a conductor with a rectangular cross-section. Its core function is to collect the main power supply current and divert it to various branches, simplify the wiring inside the distribution cabinet, and facilitate later maintenance. Its surface color has clear industry standards and corresponds to different lines, which is an important symbol to ensure electrical operation safety.
 

Although Power distribution bus bar has excellent conductivity, it is prone to react with oxygen and sulfides when exposed to air for a long time, generating an oxide layer, increasing contact resistance, and causing local heating. Therefore, it is necessary to choose an appropriate surface treatment method according to the usage scenario. Bare copper bars require no treatment and have the best heat dissipation performance, but have poor corrosion resistance and are only suitable for short-term use in dry and clean indoor environments. Tin plating is the most widely used treatment method, and the tin layer can effectively isolate air, prevent copper substrate oxidation, and improve corrosion resistance. However, the thermal conductivity of tin is much lower than that of copper, which will affect heat dissipation to a certain extent.

Silver plated Backplane bus bars have the best performance. Silver has excellent conductivity and thermal conductivity, which can balance the heat dissipation advantage of copper bars with stable contact resistance. It is commonly used in key parts such as high-end electrical contacts, but the cost is high and the application range is limited. The core indicator for judging the heat dissipation of copper bars is temperature rise, which must strictly comply with the requirements of the national standard GB7251.1 to avoid safety hazards caused by excessive temperature rise.

When connecting the Copper solid bus bar to the frame circuit breaker, relevant specifications must be strictly followed, and every detail is related to the safe operation of the power system.

Firstly, it is necessary to clarify the entry and exit methods. Whether it is from top to bottom or from left to right, it will determine the overall direction of the copper bars and the layout inside the cabinet, which needs to be determined in the early stage of design.

Secondly, it is necessary to strictly control the phase sequence and N-phase position. The A, B, and C phase sequences of three-phase electricity should not be confused, otherwise it may cause serious problems such as motor reversal. The position of the neutral line and whether side backflow is required should also be clearly marked.

At the same time, the specifications of the Vertical copper bonding busbar must match the carrying current, and the electrical clearance and creepage distance between live copper bars and between copper bars and grounded cabinets must comply with national standards to prevent air breakdown and arc generation. In addition, the punching of copper bars needs to be precise, and the hole position, diameter, and pattern need to be adapted to the installation requirements. Finally, it is necessary to clarify the layout of the outgoing copper bars to ensure smooth connection with external cables and busbars.

The installation of the Tinned copper ground bar for underground system in the computer room must strictly follow standardized procedures and relevant specifications to ensure the reliable operation of the grounding system. The construction shall be carried out in accordance with the "Construction Preparation → Grounding Device Installation → Downlead Installation → Lightning Protection Belt Support Installation → Lightning Protection Network Laying → Grounding Resistance Test". The materials used shall comply with the relevant specifications of GB50169-2006, and all welds shall be full and defect free with anti-corrosion treatment.

If structural steel bars are used for the down conductor of the Grounding busbar Tmgb copper, the length of the weld seam must not be less than 6 times the diameter of the steel bar. The lightning protection strip should be made of 25 × 4mm hot-dip galvanized flat steel, and the spacing between supports should not exceed 1.5m. Electrical grounding should use standard systems such as TT, TN-C-S, TN-S, etc. The high and low voltage machine rooms should be equipped with 300mm high grounding rings, and all metal components should be equipotential connected. The grounding resistance should be tested with specialized instruments to meet the standard, ensuring the stability and safety of the system.

If you have any procurement, technical consultation, or installation related needs for Grounding copper busbars, please feel free to contact us at any time. We will provide professional solutions and high-quality services based on your actual situation. We look forward to your inquiry.