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High-Performance Busbar Heat Shrink Tube from China Factory - Top Suppliers for Insulation 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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①◎ Preparation Steps
• Clean busbar surfaces to remove oil and dust.
• Select tubing size based on busbar dimensions. -
②◎ Shrinkage Operation
• Heat with a heat gun or oven at 120℃～140℃ until fully shrunk.
• Avoid localized overheating to prevent material degradation. -
③◎ 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
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◎
Compact design: reduces phase spacing, enhancing space efficiency.
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Full environmental protection: moisture, dust, corrosion, and animal-resistant.
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Safety compliance: UL, ROHS certified, ensuring electrical safety.
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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
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 substations.
Shrinkage begins at 80℃ and the tubing fully shrinks at 120℃. During installation, apply heat using a heat gun or oven at 120℃～140℃. Avoid localized overheating to prevent material degradation. Always ensure even heating for consistent shrinkage.
Yes. The tubing is UL 224 certified (meeting VW-1 fire safety standards) and ROHS 2.0 compliant, meaning it is lead-free and halogen-free. It also meets IEC 60811-1-1 testing requirements, ensuring both electrical safety and environmental responsibility.
The tubing is available in Red, Yellow, and Green, which correspond to standard three-phase electrical color coding. This helps with phase identification in switchgear, substations, and industrial electrical installations, improving safety and organization.
Store the tubing at temperatures between -20℃ and 30℃, with relative humidity below 70%. Keep it sealed in its original moisture-proof packaging and away from direct sunlight, heat sources, and sharp objects to preserve its material integrity and insulation performance.
Yes. Made from radiation-crosslinked polyolefin, this tubing offers excellent resistance to acids, alkalis, and salt corrosion. Its dense insulation layer also prevents moisture and dust ingress, making it well-suited for outdoor installations and industrial environments exposed to harsh chemicals or contaminants.