Core uses and selection precautions of Busbar heat shrink insulated tube

 

Busbar with heat shrink insulation is a heat shrinkable polymer insulation sleeve designed specifically for copper busbars and insulated busbars. It is a specialized protective material in the fields of power distribution and new energy engineering. The core relies on the physical properties of radial shrinkage after heating, tightly wrapping around the outer part of the busbar to achieve core functions such as high-voltage insulation, physical protection, and anti electric shock fixation.

 

This type of specialized pipe material has excellent wear resistance, insulation and temperature resistance. Most compliant products meet UL, CSA and relevant power industry specifications. With strong adaptability, Busbar heat shrink sleeves are widely used in intensive use scenarios such as new energy vehicle battery packs, photovoltaic energy storage systems, rail transit distribution, data center UPS, industrial distribution cabinets, power appliances, etc. The main function is to protect bare copper busbars from environmental damage, block high-voltage creepage and short circuit hazards, extend the service life of busbars, and ensure the stability of the entire power distribution system operation.

 

The production materials of Heat shrink tubing busbars are mainly high flame retardant and high insulation special materials. The mainstream materials used are irradiated cross-linked polyolefin materials, including PVC, high temperature resistant modified engineering plastics and other categories. Some styles that are suitable for extreme working conditions also use composite structures with hot melt adhesive lining. Among them, irradiated cross-linked polyolefin is the preferred main material for busbar special models, which has high shrinkage adhesion, high voltage insulation, high and low temperature resistance and mechanical strength. It is fully compatible with the large-sized, irregular bending, high voltage distribution and other usage characteristics of busbars, and its protective performance is far superior to ordinary cable heat shrink tubing.

 

 

 

The core values of Busbar heat shrink tube focus on high-voltage insulation protection, environmental corrosion resistance, and standardization of busbar systems, fully meeting the engineering needs of copper busbars and insulated busbars. Its core applications are divided into six categories.

Firstly, high-voltage electrical insulation is used for fully wrapped insulation of bare copper busbars, busbar joints, connecting terminals, and overlapping parts, to block the risk of high-voltage creepage and arc breakdown, and to prevent leakage, short circuit, and electric shock accidents.

Secondly, the Heat shrink insulated busbar is resistant to corrosion and damage, isolating moisture, salt spray, dust, and chemical substances from the air to prevent oxidation and corrosion of the busbar. It also resists minor bumps and friction damage during installation and operation, making it suitable for outdoor energy storage and harsh industrial environments.

 

Thirdly, system space optimization can reduce the insulation spacing between phases by tightly wrapping the busbar, adapting to high-density and compact layouts of battery packs, distribution cabinets, and energy storage cabinets, and improving the utilization of internal space of the equipment.

Fourthly, visual identification can be used to distinguish between different colored PE heat shrink tube insulated busbars for phase sequence identification, which facilitates later operation, maintenance, and line inspection, greatly improving the recognition of the distribution system.

Fifth, sealing and protection reinforcement, achieving 360 ° sealing and wrapping for the busbar joints and wiring parts to prevent water vapor and dust from entering, while strengthening the busbar connection structure to enhance overall power distribution stability.

Sixth, it is adaptable to irregular structures, which can fit the surface of bent, punched, and irregularly cut mother boards. After shrinkage, there are no bubbles or gaps, and it is suitable for the protection needs of various customized mother board structures.

 

 

The installation of Busbar sleeves insulation must follow standardized procedures to achieve a tight fit with the busbar and fully utilize the high-voltage insulation and protection effects. The specific operation is divided into six core steps.

The first step is to measure the Copper busbar PVC insulated size, accurately measure the width, thickness, length, and maximum outer diameter of the busbar at the bending position, as the core basis for pipe selection and cutting, without the need to polish the original surface of the busbar.

The second step is to match the compliant specifications and select pipes with an inner diameter greater than the maximum outer diameter of the busbar, and a contracted inner diameter that fits the actual size of the busbar. Based on the shrinkage ratio, calculate the appropriate model to ensure that it can be smoothly inserted and contracted tightly without looseness.

The third step is to cut the length reasonably. Considering that the heat shrink tubing of the busbar will have a longitudinal shrinkage rate of 5% -7% after heating, sufficient margin should be reserved during cutting to ensure that the entire section of the busbar is fully covered after shrinkage, and no conductive parts are exposed.

Step four, standardize the insertion and positioning, evenly place the cut Busbar insulating tubing in the designated position of the busbar, avoid welding points and protruding parts of the joints, and ensure that the whole is centered without deviation.

Step five, uniformly heat and shrink, use a hot air gun to heat at a constant speed at a distance of 3-6 inches from the pipe, slowly move and flip along the length direction of the busbar to ensure uniform heating around the pipe and achieve seamless fitting in all directions.

Step six, let it cool and solidify. After heating is complete, let it sit for 5-10 minutes until the heat shrink tubing is completely cooled and solidified, and firmly attached. Then proceed with the installation and wiring of the busbar to avoid sealing failure and insulation layer warping caused by displacement before cooling.

When selecting and using Busbar heat shrink insulated sheets, it is necessary to consider the specifications of the busbar, distribution voltage, working environment, and engineering requirements to control the core points and avoid insulation protection failure caused by selection or operation errors.

 

Firstly, the material and voltage should be matched. For conventional low-voltage distribution cabinets, ordinary polyolefin busbar heat shrink tubing should be used. For high-voltage new energy scenarios of 3500VDC-5000VDC, high-voltage dedicated busbar heat shrink tubing should be selected. For high-temperature and corrosion-resistant working conditions, modified engineering plastic materials should be preferred.

 

Secondly, strict control should be exercised over size and shrinkage ratio, and corresponding specifications should be selected based on the cross-sectional size and bending radius of the busbar to prevent problems such as being unable to fit in due to small size or shrinking and loosening due to large size. It is recommended to use high shrinkage ratio specialized pipes for large-sized busbars; Again, pay attention to temperature resistance and flame retardant performance. Customized busbar insulating tubes generate heat during operation, so it is necessary to choose pipes with working temperature coverage of -45 ℃~+150 ℃, while prioritizing UL94-V-0 flame retardant rating and adapting to electrical engineering safety standards.

 

Finally, to ensure process and compatibility, the surface of the busbar needs to be cleaned in advance to remove oil stains and oxide layers, ensuring a firm fit of the heat shrink tubing. The tubing should be compatible with the Solid insulation tubing busbar coating (silver plated, tin plated, nickel plated) and the materials of surrounding electrical components to avoid chemical reactions leading to insulation layer aging and cracking. At the same time, products certified by ISO9001, RoHS, and REACH should be preferred to be suitable for various formal power and new energy engineering applications.

 

 

If you need to customize Busbar heat shrink insulated tubes for scenarios such as new energy vehicles, photovoltaic energy storage, and distribution cabinets, or have professional questions about selection and specification matching, please feel free to contact us at any time. We will arrange a professional engineering team to provide you with one-on-one solution answers, free sample applications, and accurate quotation services to help your project land efficiently.