1. DC resistance

      The DC resistance of the conductive core of the finished XLPE solar cable at 20°C is not more than 5.09Ω/km.

      2 Immersion voltage test

      The finished cable (20m) will not break down after being immersed in (20±5)℃ water for 1h after 5min voltage test (AC 6.5kV or DC 15kV).

      3 Long-term withstand DC voltage

      The length of the sample is 5m, and it is put into distilled water containing 3% sodium chloride (NaCl) at (85±2)℃ for (240±2)h, and the two ends are 30cm above the water surface. Apply a DC 0.9kV voltage between the wire core and the water (the conductive wire core is connected to the positive electrode, and the water is connected to the negative electrode). After taking out the sample, perform a water immersion voltage test. The test voltage is AC 1kV, and no breakdown is required.

      4 Insulation resistance

      The insulation resistance of the finished XLPE solar cable at 20℃ is not less than 1014Ω·cm,

The insulation resistance of the finished XLPE solar cable at 90°C is not less than 1011Ω·cm.

      5 Sheath surface resistance

      The surface resistance of the finished XLPE solar cable sheath should not be less than 109Ω. 1. High temperature pressure test (GB/T 2951.31-2008) temperature (140±3)℃, time 240min, k=0.6, the depth of indentation does not exceed 50% of the total thickness of insulation and sheath. And carry out AC6.5kV, 5min voltage test, no breakdown is required.