Xlpe Power Cable YJV22 8.7/15KV 3*35 Core Fireproof Copper Power Cable Industrial Construction

This product is a medium voltage power cable designed for industrial construction and power distribution projects. The model YJV22 refers to copper core, XLPE insulated, steel tape armoured and PVC sheathed power cable. The designation 8.7/15kV indicates the rated voltage level, where 8.7kV is the rated phase-to-earth voltage (U₀) and 15kV is the rated phase-to-phase voltage (U) in 50Hz AC systems.

The 3*35 configuration means three copper cores, each with a cross-sectional area of 35mm². This specification provides a balanced solution between current carrying capacity and cable flexibility, suitable for medium voltage feeder lines and distribution network applications where electrical load is moderate but installation conditions require robust protection.

Specifications

Detailed Construction

The cable is manufactured in multiple layers, each serving a specific function:

1. Conductor: Stranded bare annealed copper wires, class 2 to IEC 60228, round compacted. The copper purity ensures low electrical resistance and stable conductivity over the cable life.

2. Conductor screen: Semi-conducting compound extruded over the conductor. This layer ensures uniform electrical field distribution and prevents partial discharge.

3. Insulation: XLPE (cross-linked polyethylene). This material offers excellent dielectric properties, high insulation resistance, low dielectric loss and stable performance across a wide temperature range.

4. Insulation screen: Extruded semi-conducting layer combined with swellable tape. This layer is essential for controlling electrical stress under operating voltage.

5. Copper tape screen: Wrapped around the insulated cores. Provides protection against electromagnetic interference and serves as earth path for leakage current.

6. Inner sheath: PVC applied over the laid-up cores, with suitable fillers to maintain a round profile.

7. Armour: Double steel tape applied helically. This layer protects against mechanical damage during installation and service, including impact, compression and rodent attack.

8. Outer sheath: UV stabilised PVC compound, black. Resistant to moisture, soil chemicals and general environmental exposure.

Application Scenarios

This YJV22 8.7/15kV 3*35 power cable is suited for fixed installations in medium voltage power distribution systems including:

• Industrial plants and factories: Main distribution feeders from substation to workshop sub-boards; power supply to medium voltage motors and transformers. In industrial sites where power load is high and cables must withstand mechanical stress from adjacent equipment.

• Commercial and high-rise buildings: 10kV incoming feeders to building distribution rooms; power supply for fire protection systems, HVAC and lifts where safety is prioritized. GB51348-2019 stipulates that for buildings above 100m, cables must meet B1 combustion performance with t0 smoke toxicity and d0 dripping rating—this cable is available in fire upgraded versions.

• Infrastructure projects: Underground power distribution in tunnels, cable trenches and direct burial where mechanical protection from backfill or foot traffic is required.

• Outdoor substations and power stations: Connections between transformers and switchgear; auxiliary power supply lines where cables may be routed through cable ducts.

• Renewable energy installations: 10kV connections from photovoltaic or wind farm substations to grid interconnection points.