Copper Busbars PVC Heat-Shrink Insulation Sleeves
What are Copper Busbars PVC Heat-Shrink Insulation Sleeves?
Essential positioning: The Copper Busbars PVC Heat-Shrink Insulation Sleeves are rigid, hard-connected conductors. The dielectric isolation between the live body and the grounded body is achieved through sleeve-type insulation coating, while maintaining the mechanical strength and conductive continuity of the copper bus body.
Core features:
Double-layer heterogeneous structure: the inner layer is a cold-rolled T2 copper bar, which provides a low-impedance current-carrying channel; the outer layer is a radiation cross-linked PVC heat shrink sleeve, forming a continuous and seamless insulating sheath.
Shrink memory characteristics: After the heat shrink sleeve is heated to a specific temperature, the radial shrinkage rate can reach 2:1 to 3:1, closely fitting the surface contour of the copper bus and eliminating air gaps.
Rigid force transmission: As a hard connection, the busbar not only transmits power between devices but also assumes a certain structural positioning function, and the connection points have no flexible displacement.
Peelable insulation interface: The insulation layer and the copper bar are mechanically covered rather than chemically bonded, allowing insulation renewal without damaging the conductor body.
Copper Busbar with Heat Shrink Tube Insulation Application advantages: reliable verification in multiple scenarios
Manufacturing of high and low voltage switch cabinets
Used for insulation protection of main busbars, branch busbars, and contact box connections, significantly improving the equipment's temperature rise test pass rate and insulation level.
New energy power battery pack
For the internal copper bar connection of the battery pack, we provide a lightweight, high- and low-temperature impact-resistant insulation solution to ensure the safety of the battery system.
Transformer and reactor terminal blocks
Solve the problem of insufficient distance between terminal blocks and provide reliable phase isolation.
Industrial automation control cabinet
In complex wiring environments, hard-connected copper bars are marked and protected to facilitate later maintenance and inspection.
Production Process for Heat Shrink Tube Copper Busbar Connection
Formula development and granulation
Select high-quality PVC resin powder, scientifically proportion plasticizers, flame retardants, and antioxidants, and granulate through high-speed mixing and twin-screw extrusion.
01
Precision extrusion molding
Using an imported extruder, the pellets are heated and melted, and then extruded into tube blanks through high-precision molds.
02
Electron beam irradiation
The tube blank is irradiated and cross-linked through a high-energy electron accelerator to change the molecular structure and give it a heat-shrinkable "memory" function.
03
Expansion and shaping
Under heating, a mechanical device is used to radially expand the cross-linked pipe to a predetermined size, and then rapidly cooled and shaped.
04
Strict quality inspection and packaging
Finished products undergo comprehensive testing of electrical performance, mechanical performance, and appearance. Once qualified, they are packaged in standardized rolls or cut to length.
05
Frequently Asked Questions
Q1: What is the difference between Pure Solid Copper Busbar with Heat Shrink Tubing and ordinary heat-shrinkable tube?
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A: Busbar-specific heat-shrinktubing is superior to ordinary heat-shrink tubing in terms of wall thickness design, electrical strength, mechanical protection level, etc. Busbar bushings need to meet higher voltage levels (up to 35kV), more stringent flame retardant requirements (UL94V-0), and better mechanical strength (tensile strength ≥14MPa) to cope with severe working conditions such as high current temperature rise and electrodynamic stress during busbar operation.
Q2: How do I choose the appropriate bushing size for my busbar specifications?
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A: When selecting, the overall dimensions (width × thickness or diameter), shape (rectangular or circular), and voltage level of the busbar must be comprehensively considered. It is generally recommended that the inner diameter of the casing after expansion should be slightly larger than the maximum external dimension of the busbar, and the inner diameter after shrinkage should be smaller than the minimum external dimension of the busbar to ensure a tight fit after shrinkage. Our company can provide professional selection suggestions based on your busbar drawings.
Q3: Can the product meet the environmental protection requirements for export?
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A: Yes. The product has passed the EU RoHS environmental protection directive certification and uses a halogen-free environmentally friendly formula. SGS test reports, UL certification certificates, and other related compliance documents can be provided according to customer requirements.
Q4: Will the casing crack or shrink twice after shrinking?
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A: Products processed by the radiation cross-linking process have excellent dimensional stability and will not undergo secondary shrinkage within the normal use temperature range. The product passed the 160°C, 4-hour thermal shock test without cracking. When installed correctly, the bushing maintains stable insulation performance during long-term use.
Q5: Can I print logo or brand information on the sleeve?
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A: Yes. Our company provides customized printing services on the surface of the casing, which can print color and color logos, brand LOGOs, specifications, safety warnings, and other information. The printing ink has good temperature resistance and adhesion, ensuring that the logo is clearly legible during sleeve shrinkage and long-term use.
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If you are looking for a reliable Copper Busbar with Tin Plated Heat Shrink Tubing supplier that meets the needs of EV, ESS, and industrial electrical systems, we can provide professional engineering support and customized manufacturing solutions based on your structural drawings, electrical parameters, and application environment to help your project achieve higher reliability and better system integration effects.
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