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Extremely High Insulation Busbar Heat Shrink Tube from China Factory - Top Suppliers for Electrical Protection Solutions
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
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◎ 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
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◎ 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 Design
Reduces phase spacing, enhancing space efficiency.
🛡️
Full Environmental Protection
Moisture, dust, corrosion, and animal-resistant.
✅
Safety Compliance
UL, ROHS certified, ensuring electrical safety.
⚙️
Easy Installation
Fast 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 this busbar heat shrink tubing?
This busbar heat shrink tubing is available in three voltage ratings: 1KV, 10KV, and 35KV, making it suitable for a wide range of electrical applications from low-voltage distribution panels to high-voltage substation busbars.
What is the shrinkage temperature and how should the tubing be installed?
The tubing begins to shrink at 80℃ and fully contracts at 120℃. Installation is straightforward: clean the busbar surface, slide the tubing over it, then apply uniform heat using a heat gun or oven at 120℃–140℃. Avoid localized overheating to prevent material degradation.
Is this product compliant with international safety and environmental standards?
Yes. The tubing is UL 224 certified (VW-1 flame retardancy standard) and ROHS 2.0 compliant. It is lead-free and halogen-free, meeting both fire safety and environmental sustainability requirements for global markets.
What is the operating temperature range of the busbar insulation tubing?
The tubing supports a continuous operating temperature range of -55℃ to +105℃, making it ideal for both extreme cold environments and high-temperature industrial applications.
How is the product packaged and what are the recommended storage conditions?
The tubing is available coiled or straight-cut, with 50 meters per roll, sealed in moisture-proof bags. It should be stored at temperatures between -20℃ and 30℃, with relative humidity below 70%, and away from direct sunlight to maintain product integrity.
Can this heat shrink tubing protect against rodents and moisture ingress?
Yes. The dense crosslinked polyolefin insulation layer provides effective protection against moisture, dust, and animal intrusion including rodents and snakes, significantly reducing the risk of electrical short circuits caused by environmental factors.