Driven by both high-end and green technologies, Solid Insulation Tubing Busbar are leading a new trend in power transmission upgrades

Against the backdrop of accelerated construction of new power systems and the in-depth implementation of "dual-carbon" goals, the power transmission and distribution sector is undergoing a structural upgrade. High-efficiency, safe, and compact transmission equipment has become a core demand for industry development. Solid Insulation Tubing Busbar, as a key component, are gradually replacing traditional bare bars due to their diverse performance advantages, leading the industry towards high-end and green development. Along with Solid Insulation Tubing Bar and Customized bar Insulating Tube, they belong to the high-end bar system and have become an important force supporting the efficient operation of power systems. It is reported that the domestic busbar market size exceeded 8 billion yuan in 2025, with a stable annual compound growth rate of over 7%. Solid-insulation products, due to their alignment with the development trend of smart grids, have seen their market share continue to rise, becoming the core engine of industry growth.

As a highly efficient power current-carrying device, solid-insulated busbars use hollow copper, aluminum, or aluminum alloy tubes as the main conductor, covered with sealed solid insulation materials such as polytetrafluoroethylene (PTFE) and epoxy resin, and combined with a grounded metal shielding layer to form a complete structure. Its structural design considers both the high-efficiency heat dissipation requirements of the conductor and the reliable protection achieved through high-quality insulation materials, which is highly consistent with the core design concept of Busbar Insulating Tubing. Specifically, the hollow conductor can utilize natural convection heat dissipation through the internal air duct, significantly improving heat dissipation efficiency. Combined with the low dielectric loss, aging resistance, and flame-retardant properties of the outer polymer insulation material, and the suppression of electric field concentration by the shielding layer, the product exhibits unique advantages in 6~35kV high-voltage substations and high-current transmission and distribution systems. This is also its core highlight, distinguishing it from conventional insulated bars such as Copper Bar PVC Insulated and PVC Insulation Bar.

From an application perspective, the market penetration rate of solid-insulated busbars is continuously increasing, with widespread use in complex power systems such as substations, power plants, transformers and switchgear, and enclosed generator outlets. Simultaneously, it is gradually expanding into high-load industrial facilities such as rail transit traction substations and metallurgical and chemical plants, synergizing with products like EV Battery Connectors and Battery Terminal Bus Bars to complete a full-scenario power transmission solution. It is worth noting that the industry is currently facing a dual squeeze of overcapacity in low-to-mid-range bars and insufficient supply of high-end products. Foreign brands still dominate the 35kV and above high-end segment. However, solid-insulated bars, as a crucial breakthrough point for domestic high-end bars, are experiencing accelerated technological upgrades and localization. The emergence of customized products such as Customized Busbar Insulating Tubes further adapts to the personalized needs of different scenarios, driving product development towards scenario-based and refined solutions.

Looking ahead, with continued investment in new power systems and the implementation of new regulations such as the "Green Product Evaluation Standard," the development of Solid Insulation Tubing Busbar will usher in new opportunities. The industry will further promote technological iteration, optimize conductor materials and insulation processes, and integrate the insulation technology advantages of PE Heat Shrink Tube Insulated Bar and Heat Shrink Tube Polyolefin Busbar to improve the low-loss and long-life characteristics of products. Simultaneously, it will accelerate the pace of domestic substitution, breaking the foreign monopoly in the high-end market. It is projected that the high-end bar market will expand at an average annual growth rate of 18.7% over the next five years. As a core product category, solid-insulated bars will continue to leverage their technological advantages, leading the power transmission field to achieve efficient, safe, and green upgrades, providing solid support for the construction of new power systems.

If you are interested in the dynamics of the Solid Insulation Tubing Busbar industry, have related technical consultation or adaptation needs, please feel free to contact us to explore new opportunities for industry development.