Medium & High Voltage XLPE Insulated Power Cables

This product line refers to medium and high voltage power cables insulated with cross-linked polyethylene (XLPE), covering mainstream voltage grades of 3kV, 6kV, 10kV, 20kV and 35kV. It serves as the core cable for urban main power grids, substation connections and large-capacity power supply for industrial parks. Constructed with XLPE primary insulation wrapped around conductors, together with composite layers including metallic shielding, armor protection and outer sheath, the cross-linking process greatly improves heat resistance, voltage resistance and electrical stability, catering to long-distance, large-capacity and high-voltage power transmission.

Core Performance Advantages

1. Stable Electrical Performance & Outstanding Voltage Withstand CapacityXLPE insulation features ultra-low dielectric loss, high insulation resistance and uniform electric field distribution, which can withstand medium & high voltage power frequency electric field with minimal partial discharge. No obvious insulation degradation occurs during long-term high-voltage operation; stable capacitance reduces reactive power loss for long-distance transmission and elevates power supply efficiency.

2. Strong Heat Resistance & Ample Current-Carrying CapacityThe maximum continuous permissible operating temperature of conductors is 90℃, while the instantaneous short-circuit withstand temperature reaches up to 250℃. Its thermal performance far outperforms oil-impregnated paper insulated cables. Larger loads can be borne under the same cross-section, satisfying power expansion demands for areas with concentrated high-power loads.

3. Robust Mechanical Structure & Wide Laying AdaptabilityEquipped with copper tape/wire metallic shielding layers to equalize electric field and restrain partial discharge; steel tape or steel wire armor is optional to enhance compression resistance, tensile strength and impact resistance. With a moderate bending radius, it is applicable to tunnel laying, direct burial in cable trenches, cable tray overhead installation, conduit routing and underwater laying. It eliminates the drawbacks of traditional oil-filled cables such as oil leakage and limited bending flexibility.

4. Excellent Environmental Resistance & Extended Service LifeThe insulation resists UV radiation, acid-alkali soil corrosion, moisture and weather aging thoroughly. Free from oil leakage risks, it causes no soil or environmental pollution. Its designed service life exceeds 30 years under conventional underground and outdoor operating conditions.

5. Easy Maintenance & Ample Safety MarginNo regular oil refilling is required, bringing low maintenance workload. Fault signs can be captured easily before insulation breakdown for online monitoring and troubleshooting. Flame-retardant and low-smoke zero-halogen versions are available to slow down insulation damage and curb fire spread in case of fire accidents.

6. Long Transmission Distance for Large-Capacity Grid ConnectionThin yet high-withstand insulation leads to smaller outer diameter and moderate overall weight, lowering comprehensive construction costs for long-distance trunk lines. It is widely adopted for regional grid interconnection and inlet/outlet lines of substations.

Application Scenarios

It is extensively deployed in urban main power grids, inlet and outlet cables of regional substations, high-voltage power distribution for large industrial and mining enterprises, power delivery lines of new energy power stations (photovoltaic & wind power), suburban intercity high-voltage transmission trunk lines. It is also suitable for underground utility tunnels, mountain overhead lines, river-crossing laying and large-capacity power supply for ports and industrial parks. In addition, it acts as the high-voltage incoming power supply for large buildings, data centers and industrial parks, undertaking power transmission and distribution at 10kV~35kV medium & high voltage levels.