Photovoltaic dedicated cable
A large number of DC cables in photovoltaic power plants need to be laid outdoors, and the environmental conditions are harsh. The cable materials should be determined based on their resistance to UV, ozone, severe temperature changes, and chemical erosion. Long term use of ordinary material cables in this environment will cause the Solar Cable sheath to be fragile and even decompose the cable insulation layer. These situations can directly damage the cable system and increase the risk of cable short circuits. In the medium to long term, the likelihood of fire or personal injury is also higher, greatly affecting the service life of the system.
Therefore, it is very necessary to use photovoltaic specialized cables and components in photovoltaic power plants. With the continuous development of the photovoltaic industry, the market for photovoltaic supporting components has gradually formed. In terms of cables, various specifications of photovoltaic professional cable products have been developed. The recently developed electron beam cross link cable has a rated temperature of 120 ℃, which can withstand harsh climatic environment and mechanical shock. For example, RADOX cable is a solar specialized cable developed according to the international standard IEC216. In outdoor environments, its service life is 8 times that of rubber cables and 32 times that of PVC cables. Photovoltaic specialized cables and components not only have the best weather resistance, UV resistance, and ozone erosion resistance, but also can withstand a larger range of temperature changes (such as from -40 to 125 ℃). In Europe, technicians have tested and found that the temperature values measured on the roof can reach as high as 100-110 ℃.
Comparative differences
The characteristics of photovoltaic cable are determined by its special insulation material and sheath material, which we call cross-linked PE. After irradiation by the irradiation accelerator, the molecular structure of the cable material will change, thus providing its performance in all aspects. In fact, during installation and maintenance, cables can be routed on sharp edges of the roof structure, and must withstand pressure, bending, tension, cross tensile loads, and strong impacts. If the strength of the cable sheath is insufficient, the insulation layer of the cable will be severely damaged, which will affect the entire service life of the cable, or lead to problems such as short circuits, fire, and danger of personal injury.
Executive standards
CQC1102-2013、2 Pfg 1990/05.2012、CEEIA B218-2012
Product characteristics
- Rated voltage of DC single core cable: 900V, 1500V; The rated AC voltage is 0.6/1KV.
- During normal operation, the maximum allowable continuous working temperature of the conductor during normal use of the cable is 120 ℃.
- The minimum bending radius of the cable is 6 times the diameter of the cable, the ambient temperature for cable use is -40 ℃~90 ℃, and the laying ambient temperature is ≥ 0 ℃.
