MV Semi-Conductive Outer Shielding Material, specifically the 0835 Cross-linkable Semi-conductive Outer Shielding Compound, is a high-performance strippable insulation shield engineered for medium-voltage (MV) cross-linked polyethylene (XLPE) insulated power cables rated up to 35 kV. This advanced semi-conductive compound ensures smooth electrical field distribution at the insulation interface, minimizing partial discharge and enhancing long-term cable reliability in demanding power distribution networks.
Key Features and Advantages
- Excellent Strippability: Delivers consistent low stripping force while maintaining strong anti-tearing properties, leaving a clean, smooth insulation surface after removal.
- Superior Processability: Optimized for high-temperature vulcanization (HTV) extrusion with fine surface smoothness, stable volume resistivity, and minimal pre-cure or scorch risk.
- Outstanding Electrical Performance: Provides low and stable volume resistivity at both 20°C and 90°C, ensuring reliable stress control in MV cable applications.
- Mechanical and Thermal Stability: High tensile strength and elongation retention after heat aging, excellent hot set performance, and low moisture content for superior durability.
- Wide Temperature Range: Brittle point as low as -40°C, making it suitable for extreme environmental conditions.
Typical Applications
The 0835 compound is ideal for the outer semi-conductive layer in medium-voltage XLPE power cables (up to 35 kV), widely used in urban power distribution, industrial substations, renewable energy connections, and underground cable networks where reliable insulation shielding is critical.
Technical Specifications
Recommended Processing Conditions
- Extrusion Temperature Profile (°C): Zone 1: 80–85 | Zone 2: 90–95 | Zone 3: 100–105 | Zone 4: 105–110 | Flange/Tube: 105 | Screw: 50–55
- Use double-layer filter mesh (40 mesh / 350 μm) for optimal surface quality.
- Pre-dry material in hopper at 40–60°C for 4 hours to ensure moisture content remains below specification.
Packaging and Storage
Supplied in 600 kg cardboard boxes with inner PE bags for easy handling and protection. Store in a cool, dry environment between 10–30°C. Unopened original packaging offers a recommended shelf life of up to 12 months.
MV Semi-Conductive Outer Shielding Material (0835) is the preferred choice for cable manufacturers seeking consistent quality, easy processing, and long-term performance in medium-voltage XLPE cables.
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