A power cable is an assembly of one or more electrical conductors, usually held together with an overall sheath. The assembly is used for transmission of electrical power. Power cables may be installed as permanent wiring within buildings, buried in the ground, run overhead, or exposed.
It is used to transmit and distribute power in power transmission and distribution system of 0.6/1kV to 8.7/15kV. It is generally applied to the fields including power, construction, mines, metallurgy, petrochemical industry and communication.Technincal DataOperating Features
1)Operating temperature
Max. Permissible continuous operating temperature of Conductors shall not exceed 90ºC
2)Conductor Short circuit temperature
Not exceeding 250 . (Max. Duration 5 seconds)
3)Bending radius:
Bending radius of single core cable:20D Bending radius of multi-core cable: 15D
D=Actual overall diameter of cable (mm)
4)Installation temperature:
The lowest temperature of installation is 0ºC .
Laying conditions and basic parameters for calculating current ratings:
Method of laying: Ambient temperature
In air: 40ºC Direct burial: 25ºC Soil thermal resistivity 1.0ºC· m/W
Layout of single core cables: In parallel (Spacing side by side: 1D D=overall diameter)
1. Conductor 2. Conductor Screen 3. XLPE Insulation 4. Insulation screen
5. Metallic Screen 6. Filler 7. Separator(Inner Cover) 9. Outer Sheath
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