What are the Main Properties of Photovoltaic Cables?

As a Solar Cable Suppliers, share with you.

PV1f Solar Cable

Electrical properties

1. DC resistance

The DC resistance of the conductive core of the finished 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 DC voltage resistance

The sample is 5m long and 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 cable at 20℃ is not less than 1014Ω·cm,

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

5 Sheath surface resistance

The surface resistance of the finished cable sheath should not be less than 109Ω.

Performance test

1. High temperature pressure test (GB/T 2951.31-2008)

Temperature (140±3)℃, time 240min, k=0.6, indentation depth does not exceed 50% of the total thickness of insulation and sheath. And carry out AC6.5kV, 5min voltage test, no breakdown is required.

2 Damp heat test

The sample is placed in an environment with a temperature of 90℃ and a relative humidity of 85% for 1000h. After cooling to room temperature, the change rate of tensile strength is ≤-30%, and the change rate of elongation at break is ≤-30%.

3 Acid and alkali resistance test (GB/T 2951.21-2008)

The two groups of samples were immersed in oxalic acid solution with a concentration of 45g/L and sodium hydroxide solution with a concentration of 40g/L, at a temperature of 23°C for 168h. Compared with the solution before immersion, the tensile strength change rate was ≤±30 %, elongation at break ≥100%.

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