18/30kV CU/XLPE/PVC(or PE) Power Cable

Description
Construction: Compacted stranded circular copper conductor, extruded semi-conducting compound as conductor screen, cross-linked polyethylene(XLPE) insulation, semi-conducting compound as insulation screen, copper tape or combination of copper wire and tape as metallic screen, three cores assembled together with non-hygroscopic polypropylene filler, wrapped with binder tape, PVC or PE outer sheath.

Type	Description	No. of cores	Nominal cross section of conductor
YJV	Copper conductor/XLPE insulation/PVC outer sheath Power Cable	1 or 3	50~800mm2
YJY	Copper conductor/XLPE insulation/PE outer sheath Power Cable	1 or 3	50~800mm2
ZA-YJV ZB-YJV ZC-YJV	Copper conductor/XLPE insulation flame-retardant Power Cable	1 or 3	50~800mm2
WDZA-YJY WDZB-YJY WDZC-YJY	Copper conductor/XLPE insulation Low Smoke Halogen Free or Zero Halogen (LSHF or LSZH) flame-retardant Power Cable	1 or 3	50~800mm2

Operating Characteristics
Rated voltage U₀/U(U_m): 18/30(36)kV
U₀ is the rated power frequency voltage between conductor and earth or metallic screen for which the cable is designed;
U is the rated power frequency voltage between conductors for which the cable is designed;
U_m is the maximum value of the “highest system voltage” for which the equipment may be used.
Max. permissible continuous operating temperature of conductor: 90 °C
Max. temperature of conductor during short-circuit (5s max. duration) shall not exceed: 250 °C
The ambient temperature under installation should not be lower than: 0 °C
The bending radius of cable is recommended as following:
For single core cable: not less than 20 times of the diameter of cable
For three core cable: not less than 15 times of the diameter of cable

Application
The cable is used for fixed installations such as electric power distribution networks or industrial installations, which is laid indoors, outdoors, in tunnel or in cable trench, unable to bear external mechanical force.
Single core cable in magnetic duct is not permissible.

Manufacturing Standards
GB/T 12706-2008, IEC 60502-2