YJLW03 64/110kV Single-Core Copper XLPE HV Cable
Underground 110kV class HV cable. Segmental compacted copper conductor with triple-extruded dry-cured XLPE insulation, copper-wire metallic screen for fault-current return, longitudinal water-blocking, and corrugated aluminum sheath with PE oversheath. Built for the rare combination of distance, high voltage, and SEA tropical soil that overhead transmission cannot serve.
Technical Specifications
| Conductor material | Milliken segmental compacted copper |
| Conductor screen | Semi-conductive XLPE, extruded |
| Insulation | XLPE, dry-cured in nitrogen |
| Insulation screen | Semi-conductive XLPE, bonded |
| Water blocking | Longitudinal swellable tape |
| Metallic screen | Copper wire, sized for fault current |
| Sheath | Corrugated aluminum, welded longitudinal seam |
| Outer sheath | PE (HDPE) |
| Rated voltage U₀/U/Um | 64/110/123 kV |
| Cross-sections available | 300 – 2500 mm² |
| Core configuration | Single-core (3 cables per circuit) |
| Type test reference | IEC 60840 (KEMA report on file) |
Compliance Standards
- ✓IEC 60840
- ✓GB/T 11017
- ✓IEC 60287
Overview
Segmental Milliken-type compacted copper conductor minimizes AC skin effect at large cross-sections. Triple-extruded conductor-screen / XLPE / insulation-screen system extruded in one pass and dry-cured in nitrogen to eliminate moisture-driven defects. Copper-wire metallic screen sized for full single-phase fault current; longitudinal water-blocking tape under the screen seals against jacket nicks; corrugated aluminum sheath as the hermetic moisture barrier; PE outer sheath. Type-tested per IEC 60840 by independent lab.
Key Features
Hermetic aluminum sheath
Welded longitudinal seam aluminum sheath is a true moisture barrier — markedly better long-term performance than lead sheath alternatives in tropical soil.
KEMA type-tested
Type test report on file with KEMA Laboratories — extends to project-specific cross-sections via interpolation per IEC 60840.
Applications
Underground substation interconnects
Buried 110kV links between substations where right-of-way prohibits overhead lines.
Urban transmission entry
Last-mile underground feeds into city-center substations from suburban gantries.