Performance Test Solar Cable PV wire

How much do you know about the performance of photovoltaic cables? If we don't make good use of PV cables and use them in accordance with the requirements of PV cables, what impact will it have on our solar products? As you can imagine, it is important to understand the performance of PV cables.

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

Temperature (140±3)℃, time 240min, k=0.6, the depth of the notch should not exceed 50% of the total thickness of the insulation and jacket. And perform AC6.5kV, 5min voltage test, which does not require breakdown.

2 Damp Heat Test

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

3 Acid and alkali solution 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 respectively, the temperature was 23 °C, the time was 168 h %, elongation at breakage ≥ 100%.

4 Compatibility test

After the entire cable has been aged for 7 × 24 h at (135±2) ℃, the rate of change of tensile strength before and after aging of the insulation is ≤±30%, and the rate of change of elongation at breakage is ≤±30%; the rate of change of tensile strength before and after sheath aging is ≤±30%-30%, the rate of change of elongation at break is ≤±30%.

5 Low temperature impact test (8.5 in GB/T 2951.14-2008)

The cooling temperature is -40°C, the time is 16h, the weight of the drop weight is 1000g, the weight of the impact block is 200g, the drop height is 100mm, and there is no there should be visible cracks on the surface.

6 Low temperature bending test (8.2 in GB/T 2951.14-2008)

The cooling temperature is (-40±2) ℃, the time is 16h, the diameter of the test rod is 4-5 times the outer diameter of the cable, and it is wound 3-4 times. After the test, there should be no visible cracks on the sheath surface.

Only with a complete understanding of PV cable performance testing can we better apply PV cables to life.