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High-Performance Busbar Heat Shrink Tube from China Factory - Quality Insulation from Trusted Suppliers
Product Features
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⚡ Excellent Electrical Insulation
• Voltage ratings: 1KV, 10KV, 35KV, catering to diverse voltage scenarios.
• Breakdown voltage: ≥35KV/mm, ensuring safe operation in high-voltage environments.
• Insulation resistance: ≥10¹⁴ Ω·cm, effectively isolating contaminants and preventing leakage. -
🔥 Good Flame Retardancy and Safety
• Shrink ratio: 2:1 or 3:1 (radial shrinkage ≥50%), ensuring tight adherence to busbar surfaces.
• Shrinkage temperature: starts at 80℃, fully shrinks at 120℃, with fast shrinkage speed.
• Continuous operating temperature: -55℃～105℃, suitable for extreme climates.
• Tensile strength: ≥10.5 N/mm², with high tear resistance to prevent installation damage. -
🛡️ Environmental & Chemical Resistance
• Chemical resistance: withstands acid, alkali, and salt corrosion, extending busbar lifespan.
• Moisture & dust resistance: dense insulation layer prevents water vapor and dust ingress, maintaining stable electrical performance.
• Animal protection: prevents short circuits caused by rodents or snakes. -
✅ Safety & Compliance
• Flame retardancy: UL 224 certified, meeting VW-1 standards for fire safety.
• Environmental compliance: ROHS 2.0 compliant, lead-free and halogen-free, supporting sustainability.
Technical Specifications
| Parameter | Value |
| Material | Radiation-Crosslinked Polyolefin |
| Color | Red, Yellow, Green |
| Density | 1.2 g/cm³ |
| Water Absorption | ≤0.5% |
| Certification Standard | UL 224、ROHS 2.0、IEC 60811-1-1 |
Applications
◎ Substation busbar protection: reduces phase spacing, preventing short circuits and accidental electric shocks.
◎ High/low-voltage switchgear: offers insulation, anti-rust, and mechanical protection, adapting to miniaturization trends.
◎ Industrial equipment: safeguards busbar connections in motors, transformers, etc.
Installation Instructions
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🔧 Preparation Steps
• Clean busbar surfaces to remove oil and dust.
• Select tubing size based on busbar dimensions. -
🌡️ Shrinkage Operation
• Heat with a heat gun or oven at 120℃～140℃ until fully shrunk.
• Avoid localized overheating to prevent material degradation. -
🔍 Quality Inspection
• Post-shrinkage inspection: ensure no wrinkles or bubbles; insulation thickness deviation ≤±10%.
• For irregular busbar joints, use custom tubing for segmented protection.
Packaging & Storage
◎ Packaging: coiled or straight-cut, 50 meters per roll, sealed in moisture-proof bags.
◎ Storage conditions: -20℃～30℃, relative humidity <70%, avoid direct sunlight.
Key Advantages Summary
📐
Compact DesignReduces phase spacing, enhancing space efficiency.
🌧️
Full Environmental ProtectionMoisture, dust, corrosion, and animal-resistant.
🏅
Safety ComplianceUL, ROHS certified, ensuring electrical safety.
⚙️
Easy InstallationFast shrinkage, simplifying construction.
Performance Parameter
| Test Item | Test Method | Test Value |
| Tensile Strength | ASTM D638 | ≥ 12MPA |
| Breakage Elongation | ASTM D638 | ≥ 300% |
| Tensile Strength after aging | ASTM D638 | ≥ 10MPA |
| Elongation after aging | ASTM D638 | ≥220% |
| Longitudinal Shrink Ratio | ASTM D2671 | ±5% |
| Dielectric Constant | ASTM D2671 | ≥ 18Ω.CM |
| Breakdown Strength | ASTM D149 | ≥ 25KV/MM |
| Volume Resistivity | ASTM D257 | 10¹⁴Ω.CM |
| Volume Resistivity at 20℃ | ASTM D257 | 10¹⁴Ω.CM |
| Oxygen Index | ASTM D2863 | ≥ 26% |
| Water Absorption | ASTM D570 | ≤0.2% |
| Density | ASTM D792 | 1.25G/CM³ |
| Eccentricity | ASTM D792 | 30% |
| Fully Contraction Temperature Ratio | ASTM D792 | 130±5℃ |
| Test Item | Test Method | Test Value |
| Tensile Strength | ASTM D638 | ≥ 13MPA |
| Breakage Elongation | ASTM D638 | ≥ 450% |
| Tensile Strength after aging | ASTM D638 | ≥ 12MPA |
| Elongation after aging | ASTM D638 | ≥400% |
| Longitudinal Shrink Ratio | ASTM D2671 | ±5% |
| Dielectric Constant | ASTM D2671 | ≥ 18Ω.CM |
| Breakdown Strength | ASTM D149 | ≥ 25KV/MM |
| Volume Resistivity | ASTM D257 | 10¹⁴Ω.CM |
| Volume Resistivity at 20℃ | ASTM D257 | 10¹⁴Ω.CM |
| Oxygen Index | ASTM D2863 | ≥ 30% |
| Water Absorption | ASTM D570 | ≤0.2% |
| Density | ASTM D792 | 1.25G/CM³ |
| Eccentricity | ASTM D792 | 30% |
| Fully Contraction Temperature Ratio | ASTM D792 | 130±5℃ |
Product Specification Sheet
| Specification | Before Contraction | After Contraction | Packing Method | ||
| Inner Diameter (MM) | Wall Thickness (MM) | Inner Diameter (MM) | Wall Thickness (MM) | ||
| LMPG-10-φ12/6 | 12±0.1 | 0.63±0.05 | 12±0.1 | 1.25±0.05 | 25M/Roll |
| LMPG-10-φ16/8 | 16±0.1 | 0.75±0.05 | 16±0.1 | 1.5±0.05 | 25M/Roll |
| LMPG-10-φ20/10 | 20±0.1 | 0.80±0.05 | 20±0.1 | 1.6±0.05 | 25M/Roll |
| LMPG-10-φ25/12.5 | 25±0.1 | 0.85±0.05 | 25±0.1 | 1.75±0.05 | 25M/Roll |
| LMPG-10-φ30/15 | 30±0.1 | 0.90±0.05 | 30±0.1 | 1.85±0.05 | 25M/Roll |
| LMPG-10-φ40/20 | 40±0.1 | 0.98±0.05 | 40±0.1 | 2.0±0.05 | 25M/Roll |
| LMPG-10-φ50/25 | 50±0.1 | 0.98±0.05 | 50±0.1 | 2.0±0.05 | 25M/Roll |
| LMPG-10-φ60/30 | 60±0.1 | 1.05±0.05 | 60±0.1 | 2.1±0.05 | 25M/Roll |
| LMPG-10-φ70/35 | 70±0.1 | 1.05±0.05 | 70±0.1 | 2.1±0.05 | 25M/Roll |
| LMPG-10-φ80/40 | 80±0.1 | 1.15±0.05 | 80±0.1 | 2.3±0.05 | 25M/Roll |
| LMPG-10-φ90/45 | 90±0.1 | 1.15±0.05 | 90±0.1 | 2.3±0.05 | 25M/Roll |
| LMPG-10-φ100/50 | 100±0.1 | 1.20±0.05 | 100±0.1 | 2.4±0.05 | 25M/Roll |
| LMPG-10-φ120/60 | 120±0.1 | 1.25±0.05 | 120±0.1 | 2.5±0.05 | 25M/Roll |
| LMPG-10-φ150/75 | 150±0.1 | 1.25±0.05 | 150±0.1 | 2.5±0.05 | 25M/Roll |
| LMPG-10-φ180/90 | 180±0.1 | 1.30±0.05 | 180±0.1 | 2.6±0.05 | 25M/Roll |
| Specification | Before Contraction | After Contraction | Packing Method | ||
| Inner Diameter (MM) | Wall Thickness (MM) | Inner Diameter (MM) | Wall Thickness (MM) | ||
| LMPG-35-φ30/15 | 30±0.1 | 1.46±0.05 | 30±0.1 | 3.0±0.05 | 20M/Roll |
| LMPG-35-φ40/20 | 40±0.1 | 1.46±0.05 | 40±0.1 | 3.0±0.05 | 20M/Roll |
| LMPG-35-φ50/25 | 50±0.1 | 1.46±0.05 | 50±0.1 | 3.2±0.05 | 20M/Roll |
| LMPG-35-φ60/30 | 60±0.1 | 1.60±0.05 | 60±0.1 | 3.2±0.05 | 20M/Roll |
| LMPG-35-φ70/35 | 70±0.1 | 1.60±0.05 | 70±0.1 | 3.2±0.05 | 20M/Roll |
| LMPG-35-φ80/40 | 80±0.1 | 1.60±0.05 | 80±0.1 | 3.2±0.05 | 20M/Roll |
| LMPG-35-φ90/45 | 90±0.1 | 1.60±0.05 | 90±0.1 | 3.2±0.05 | 20M/Roll |
| LMPG-35-φ100/50 | 100±0.1 | 1.60±0.05 | 100±0.1 | 3.2±0.05 | 20M/Roll |
| LMPG-35-φ120/60 | 120±0.1 | 1.65±0.05 | 120±0.1 | 3.3±0.05 | 20M/Roll |
| LMPG-35-φ150/75 | 150±0.1 | 1.65±0.05 | 150±0.1 | 3.3±0.05 | 20M/Roll |
| LMPG-35-φ180/90 | 180±0.1 | 1.65±0.05 | 180±0.1 | 3.3±0.05 | 20M/Roll |
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Frequently Asked Questions
What voltage ratings are available for busbar heat shrink tubing?
Our busbar heat shrink tubing is available in three voltage ratings: 1KV, 10KV, and 35KV, making it suitable for a wide range of low, medium, and high-voltage applications including substations, switchgear, and industrial equipment.
What is the correct shrinkage temperature for installation?
Shrinkage begins at approximately 80℃ and the tubing fully shrinks at 120℃. During installation, heat evenly using a heat gun or oven at 120℃ to 140℃. Avoid localized overheating to prevent material degradation or surface damage.
Is this busbar heat shrink tubing compliant with international safety standards?
Yes. The tubing meets UL 224 certification with VW-1 flame retardancy rating and is fully ROHS 2.0 compliant, ensuring it is lead-free and halogen-free. It also conforms to IEC 60811-1-1 standards for electrical insulation materials.
Can the tubing withstand harsh environmental conditions?
Absolutely. The radiation-crosslinked polyolefin material provides excellent resistance to acid, alkali, salt corrosion, moisture, and dust. It also offers animal protection against rodents and snakes, and operates reliably across a continuous temperature range of -55℃ to 105℃.
What shrink ratios are available and how do I select the right size?
The tubing is available in 2:1 and 3:1 shrink ratios with radial shrinkage ≥50%. To select the right size, measure the outer diameter of your busbar and choose a tubing inner diameter that is slightly larger before shrinkage. Refer to our Product Specification Sheet for the full range of available inner diameters from φ12 to φ180mm.
How should the busbar heat shrink tubing be stored?
Store the tubing in a cool, dry environment at temperatures between -20℃ and 30℃ with relative humidity below 70%. Keep away from direct sunlight and heat sources. Tubing is supplied coiled or straight-cut, 50 meters per roll, sealed in moisture-proof packaging.