Customized XLPE Electrical Cable
XLPE Electrical Cable
XLPE cable refers to a cross-linked polyethylene insulated aluminum core armored cable. In the XLPE cable, the aluminum stranded wire is first shielded in the form of semi-conductive extrusion. The stranded wire provides a smooth conductor surface and prevents the formation of a cavity on the conductor surface when the cable is bent. The shielded conductor is insulated with extruded XLPE compound. The insulating layer is further shielded with a non-metallic semiconductor material layer, and a non-magnetic metal shielding layer in the form of copper or aluminum tape is applied thereon. If it is a multi-core cable, put the core wire together with a suitable filler in the gap and wrap it with PVC tape or extruded PVC. For mechanical protection, non-magnetic aluminum wire/tape/tape armor for single-core cables and steel wire armor for multi-core cables are provided on the inner sheath. Extrude a layer of PVC/PE as the outer jacket, usually with the back color to prevent moisture from entering.
Physical and Electrical Characteristics
| No.cores x | Insulation | Sheath | Outer Ø | weight | Current ratings in air 30℃ | Current ratings buried 20℃ | |
| cross-sec. | thickness | thickness | approx. | approx. | |||
| Nominal | |||||||
| Phase | Neutral | value | |||||
| mm² | mm | mm | mm | mm | kg / km | A | A |
| 3×4+1×2.5 | 0.7 | 0.7 | 1.8 | 12.7 | 277 | 37 | 47 |
| 3×6+1×4 | 0.7 | 0.7 | 1.8 | 13.9 | 363 | 47 | 60 |
| 3×10+1×6 | 0.7 | 0.7 | 1.8 | 16.1 | 527 | 64 | 81 |
| 3×16+1×10 | 0.7 | 0.7 | 1.8 | 18.6 | 766 | 85 | 106 |
| 3×25+1×16 | 0.9 | 0.7 | 1.8 | 22.2 | 1140 | 113 | 137 |
| 3×35+1×16 | 0.9 | 0.7 | 1.8 | 24.6 | 1475 | 139 |
164 |
Spatial characteristics of XLPE insulator
The spatial characteristic of XLPE insulators is that the long molecular chains of polyethylene are cross-linked with each other through a process similar to rubber vulcanization, thereby forming a three-dimensional network structure with strong bonding. Pure polyethylene is a thermoplastic material that softens and becomes plastic when heated, and hardens when cooled. Pure polyethylene will be converted to thermoset XLPE, that is, it will permanently solidify after heating. Through the cross-linking process, the polyethylene insulation layer of the cable has thermal stability, and the melting point is also greatly improved. Therefore, XLPE insulated cables have higher heat resistance and therefore better resistance to thermal deformation. Due to the excellent thermal performance, the current-carrying capacity of XLPE cables is higher than that of traditional cables.
Scope of application
XLPE cables are suitable for 132 kV Putuo high voltage and ultra high voltage applications. The cable can be used for long cable paths in high-voltage transmission, in which dielectric loss plays a major role. Compared with other high-voltage cables, this cable is light in weight, so it can be easily stretched. Since oil will never migrate from the insulator, it can be installed in inclined or vertical operation without hesitation. XLPE insulation material has extremely high moisture resistance, so no special precautions are required when connecting and terminating. The time required for the connection of XLPE cables is less than that of any other conventional cables of similar grade. These cables can be safely used in any vibration layout, such as bridges. These cables have better resistance to water, chemicals, oils and corrosive fluoride salts on the ground. These have no fire hazard. These cables are less susceptible to failure due to aging and have a longer service life.
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