N2XSY & N2XSRY Single-Core Medium Voltage Cables
Product Overview
Engineered for critical power distribution in industrial, utility, and infrastructure projects, IEC 60502-compliant single-core MV cables deliver reliable performance from 1.8/3kV to 26/35kV. Featuring XLPE or EPR/HEPR insulation with optional aluminum/steel armor, these cables are designed for indoor/outdoor, duct, tray, direct burial, and submerged installations.
Key Features & Benefits
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Voltage Range: 1.8/3kV to 26/35kV (Um: 3.6–42kV)
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Triple-Extrusion Bonding: Void-free conductor screen-insulation-insulation screen interface.
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Cold-Strippable Screens: Easy termination (min. 0.3mm; max. 500 Ω·m at 90°C).
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Armor Options: Aluminum (N2XSRY) or steel wire armor for mechanical protection.
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Flexible Installation: Suitable for ducts, trays, direct burial, and aquatic environments.
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Certified: Compliant with IEC 60502-1/2, CE, ISO 9001.
Construction & Technical Specifications
Layer-by-Layer Structure:
| Component | Specification | Standard |
|---|---|---|
| Conductor | Plain annealed copper/aluminum (Class 1/2) | IEC 60228 |
| Conductor Screen | Extruded semi-conducting compound (bonded to insulation; omitted for ≤3.6/6kV PVC/EPR) | IEC 60502 |
| Insulation | XLPE or EPR/HEPR (Thickness per Table 1) | IEC 60502 |
| Insulation Screen | Cold-strippable semi-conducting layer + optional tape (min. 0.3mm) | IEC 60502 |
| Metallic Screen | Copper tape/wire (Min. cross-section: Table 2) | IEC 60502 |
| Armor | Aluminum round wire (N2XSRY) or steel wire (diameter per Table 3) | IEC 60502 |
| Outer Sheath | PVC, PE, CSP, or chlorosulfonated PE (Thickness: 0.035D + 1.0mm) | IEC 60502 |
Critical Parameters:
Table 1: Insulation Thickness (XLPE/EPR)
| Voltage (Uo/U) | 50mm² | 240mm² | 630mm² |
|---|---|---|---|
| 1.8/3kV | 2.5 mm | 2.6 mm | 3.4 mm |
| 8.7/15kV | 4.5 mm | 4.5 mm | 4.5 mm |
| 26/35kV | 10.5 mm | 10.5 mm | 10.5 mm |
Table 2: Metallic Screen Cross-Section
| Conductor Size (mm²) | Min. Screen (mm²) |
|---|---|
| ≤120 | 16 |
| 400–630 | 35 |
| 1000 | 50 |
Material Properties & Performance
| Property | Specification |
|---|---|
| Operating Temp. | 90°C (XLPE/EPR); 70°C (PVC) |
| Short-Circuit Temp. | 250°C (XLPE/EPR, 1-sec); 160°C (PVC, 1-sec) |
| Bending Radius | 12 × Overall Diameter |
| Cold Resistance | -5°C (PVC sheath); -20°C (PE sheath) |
| Voltage Test | 30.5kV AC (8.7/15kV); 91kV AC (26/35kV) per IEC 60502 |
Application Scenarios
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Power Stations: Switchgear connections, transformer feeds.
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Industrial Plants: Heavy machinery, mining operations, manufacturing.
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Renewable Energy: Wind/solar farm grid connections.
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Infrastructure: Underground networks, bridges, tunnels.
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Marine Environments: Ports, offshore platforms (aluminum armor for corrosion resistance).
Engineering Selection Guide
1. Voltage & Insulation Selection:
| Application | Recommendation |
|---|---|
| Standard industrial | 8.7/15kV XLPE |
| High-voltage transmission | 26/35kV XLPE/EPR |
| High flexibility needed | EPR/HEPR insulation |
2. Armor Type:
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N2XSRY (Al): Corrosive environments (marine, chemical plants).
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Steel Armor: High-impact zones (mining, construction).
3. Current Ratings (Representative 90°C XLPE):
| Size | Buried (A) | Duct (A) | Air-Trefoil (A) |
|---|---|---|---|
| 240mm² | 469 (Cu) | 447 (Cu) | 641 (Cu) |
| 630mm² | 700 (Cu) | 654 (Cu) | 1045 (Cu) |
*Full EPR/XLPE current tables available in datasheet. Conditions: 20°C ground, 1.5 K·m/W thermal resistivity.*
Dimensional & Electrical Data (26/35kV Copper Example)
| Size | OD (mm) | Weight (kg/km) | Capacitance (pF/m) | Charging Current (mA/m) |
|---|---|---|---|---|
| 150mm² | 44.9 | 2,923 | 169 | 1.36 |
| 400mm² | 54.9 | 5,704 | 227 | 1.80 |
Certifications & Packaging
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Standards: IEC 60502-1 (1.8/3kV), IEC 60502-2 (3.6/6–26/35kV).
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Certifications: CE, ISO 9001.
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Packaging: Fumigated steel-wood drums (1,000m/2,000m standard lengths).
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Shipping: FOB/CIF/C&F from Qingdao or designated ports. Bulk discounts available.