Designed for the connection of high-voltage power cables;
Suitable for various installation conditions, including underground tunnels, direct burial installations (protective FRP box recommended), and installation on cable racks or supports;
Applicable for cross-bonding earthing, protective earthing, or direct earthing
in long-distance HV cable systems.
Compatible Cables
• Cable Type: XLPE or other polymer-insulated, single-core copper/aluminum conductor HV power cables;
• Metallic Screen: Aluminum sheath, lead sheath, copper wire + aluminium copolymer tape, etc.
Key Features
• The premolded stress cone, designed using geometrical electric field control and combined with sufficient interface pressure, ensures uniform electric field distribution and long-term reliable operation;
• Sufficient electrical safety design; Heat-shrink tube combined with plumbing provides excellent sealing performance and environmental protection;
• External grounding outlet design allows easy grounding connection and reliable sealing protection;
• Proven and mature design with extensive successful service experience.
Product Applicable Standards
Applicable standards: IEC 62067, GB/T 22078.
Technical Parameters
Item | Technical Specifications |
Rated Voltage (U₀ / U) | 290/500 (550) kV |
Highest System Voltage (Uₘ) | 550 kV |
| Partial Discharge Test /pC | At 1.5 U₀: no detectable PD above the specified sensitivity |
Power Frequency Withstand Voltage /kV | At 2.0 U0 for 30 min, no breakdown or flashover |
Lightning Impulse Level /kV | 1550KV |
Overall Dimensions (L × Ø) /mm | 2200*540mm, (with coffin box: 3000*658mm) |
Net Weight (Excluding Cable) / kg | 160kg (with coffin: 480kg) |
Optional Solutions
• Conductor onnection between cables by crimping or mechanical connector.
• Optional protective PRF box according to the site requirement.
• Optional fiber optic outlet design.
• Different cable sections connection can be matched according to the sleeve’s using range.
Operating Conditions
• Ambient temperature: –55 °C to +45 °C
• Installation altitude: No limitation
Storage Conditions
• Recommended storage temperature: 10–25 °C
• Storage environment: Indoor, sealed, clean, dry, and protected from heavy load.
Straight-Through Joint Selection Guide(Recommended selection based on cable insulation diameter)
Voltage Level（kV） | Product Type | Conductor Size Range (mm²) | Cable Insulation Diameter (mm) | Protective Housing |
290/500/550 | YJJTI0 290/500 | 800~2500 | 100~135 | Copper/ AL case |
290/500/550 | YJJTI1 290/500 | 800~2500 | 100~135 | Copper/AL case + FRP protection box+ sealing compound |
290/500/550 | YJJTI2 290/500 | 800~2500 | 100~135 | Copper /AL box+sealing compound |
Note:If the Termination’s specification is outside the above ranges can be customized based on cable section and insulation diameter.
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