The J30 High-voltage EPR Rubber Tape is a premium engineering solution specifically designed for the main insulation restoration of solid dielectric cables ranging from 600V to 35kV. Engineered for high-stress electrical environments, it serves as the primary insulation layer when constructing stress cones on 35kV cables, ensuring maximum reliability and safety in power distribution systems.
Beyond high-voltage insulation, this versatile EPR tape is ideal for jacket restoration of intermediate joints and terminals, providing critical moisture-proof seals for electrical connections and robust bus insulation. For optimal performance, it is recommended to stretch the tape to 3/4 of its original width during application and apply a PVC electrical tape outer wrap for enhanced mechanical protection.
Detailed Parameters
| Tensile Strength | ≥1.3 Mpa (GB/T 528) | Elongation at Break | ≥500 % (GB/T 528) |
|---|---|---|---|
| Dielectric Strength | ≥20 kV/mm (GB/T 1695) | Volume Resistivity | ≥1x10⁴ Ω·cm (GB/T 1692) |
| Dielectric Loss Tangent | ≤0.05 (GB/T 1693) | Dielectric Constant | ≤5.0 (GB/T 1693) |
| Self Viscosity | No loosening (JB/T 6468) | Heat-resistant Cracking | No cracking (JB/T 6468) |
| Heat Resistance | 100 ℃ (JB/T 6468) | Standard Thickness | 0.76mm |
Key Advantages
High Voltage Protection
Exceptional dielectric strength of ≥20 kV/mm, making it ideal for 600V-35kV cable insulation.
Thermal Stability
Maintains structural integrity and performance at temperatures up to 100°C without cracking.
Superior Elasticity
With over 500% elongation, it provides a tight, conformable seal around complex cable geometries.
Moisture Resistance
Creates an impermeable barrier that prevents moisture ingress in critical electrical connections.
Strong Adhesion
Advanced self-viscosity properties ensure the tape remains secure without loosening over time.
Industry Certified
Tested against GB/T and JB/T standards to ensure consistent industrial-grade quality.
Product Gallery
Management Platforms
Inventory Control
Optimized sizing (19mm to 50mm) for streamlined warehouse management and reduced waste.
Application Efficiency
Easy-to-stretch material reduces installation time for high-voltage stress cones.
Quality Assurance
Strict adherence to GB/T and JB/T testing protocols ensures zero-defect delivery.
Versatile Sizing
Multiple widths available to suit different cable diameters and project requirements.
Bulk Procurement
Factory-direct sourcing for consistent supply of specialized EPR insulating tapes.
Custom Specifications
Capacity to provide custom sizes and core options upon factory consultation.
Investment Return Comparison
| Feature | Standard Rubber Tape | J30 EPR Tape |
|---|---|---|
| Voltage Rating | Low to Medium | High Voltage (Up to 35kV) |
| Heat Resistance | Moderate | High (Up to 100°C) |
| Durability | Prone to Cracking | Heat-Resistant / No Cracking |
| Seal Integrity | Basic Moisture Barrier | Professional Moisture-Proof Seal |
| Maintenance Cycle | Frequent Inspections | Extended Long-term Stability |
Frequently Asked Questions
It is primarily used for the main insulation restoration of 600V-35kV solid dielectric cables, including stress cone construction and moisture-proofing electrical connections.
The tape should be stretched to 3/4 of its original width during wrapping. We also recommend applying PVC electrical tape over the top for added mechanical protection.
Yes, the J30 tape is rated for heat resistance up to 100°C and is tested for heat-resistant stress cracking to ensure it does not crack under thermal load.
Standard widths include 19mm, 25mm, 38mm, and 50mm. Custom sizes and cores are available upon request from the factory.
Absolutely. It is specifically designed to provide moisture-proof seals for electrical connections and cable end seals, preventing environmental degradation.
Yes, the J30 tape is tested according to GB/T 528, GB/T 1695, GB/T 1692, GB/T 1693, and JB/T 6468 standards.
