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High Insulation Performance Busbar Heat Shrink Tube from China Factory - Trusted Suppliers for Electrical 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
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Q What voltage ratings are available for the busbar heat shrink tubing?The busbar heat shrink tubing is available in three voltage ratings: 1KV, 10KV, and 35KV, catering to a wide range of low, medium, and high-voltage application scenarios in substations and switchgear.
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Q What temperature is required to fully shrink the tubing?The tubing begins to shrink at 80℃ and reaches full shrinkage at 120℃. During installation, a heat gun or oven operating at 120℃–140℃ is recommended. Avoid localized overheating to prevent material degradation.
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Q Is the busbar heat shrink tubing compliant with international safety standards?Yes. The tubing is UL 224 certified and meets VW-1 flame retardancy standards. It is also ROHS 2.0 compliant, ensuring it is lead-free and halogen-free, supporting both fire safety and environmental sustainability requirements.
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Q What shrink ratios are available and how do they affect installation?The tubing is available in 2:1 and 3:1 shrink ratios with radial shrinkage of ≥50%. A higher shrink ratio (3:1) is better suited for irregularly shaped or larger busbars, ensuring tight, uniform adhesion to the surface and minimizing gaps or wrinkles.
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Q Can the tubing withstand harsh environmental conditions?Yes. The tubing is designed for extreme environments. It operates continuously at -55℃ to 105℃, resists acid, alkali, and salt corrosion, and features a dense insulation layer that prevents moisture and dust ingress. It also protects against short circuits caused by rodents or snakes.
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Q How should the tubing be stored and what is the standard packaging?The tubing should be stored at -20℃ to 30℃ with relative humidity below 70% and away from direct sunlight. Standard packaging is coiled or straight-cut, 50 meters per roll, sealed in moisture-proof bags to maintain product quality during transport and storage.