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Parameter category
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Parameter item
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parameter values
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configuration parameter
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electric conductor
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Material: copper core (cross-section range: 630~1600mm²)
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External diameter of conductor
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30.0~56.5mm (The larger the section, the increasing the outer diameter)
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insulating course
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Material: Cross-linked polyethylene (XLPE), thickness of 16.5±0.5mm
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Conductor shielding layer
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Thickness of 1.2mm (semi-conductive material)
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insulation screen
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Thickness of 1.0mm (semi-conductive material)
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metallic sheath
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Wrinkle aluminum sheath (2.0±0.2mm) (double galvanized steel strip, 0.5~0.8mm)
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oversheath
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Material: flame retardant polyvinyl chloride (PVC) or polyethylene (PE), thickness of 4.5±0.2mm
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Electrical parameters
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20℃ conductor DC resistance
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0.0754~0.009 Ω / km (the larger the section, the lower the resistance)
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90℃ conductor AC resistance
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0.097~0.0142Ω/km
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capacity value
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134-282 p F/m (increased with increasing cross-section)
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Power frequency pressure test
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64 / 110kV (factory test)
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Local discharge performance
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At 5pC(1.5U₀ under-voltage)
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Mechanical and laying parameters
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minimum bending radius
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12 x cable outer diameter (armor layer requirement)
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Allow working temperature
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Long-term: 90℃, short circuit (within 5 seconds): 250℃
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Laying ambient temperature
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≥0℃
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Vehicle flow reference
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Flow rate in single return air
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Section 630mm²: 1010A; section 1600mm²: 1690A (ambient temperature 40℃, soil thermal resistance 1.0m · ℃ / W)
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Load flow rate of directly buried laying
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Section 630mm²: about 800A; section 1600mm²: about 1300A (buried depth 1m, ground temperature 35℃)
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