On December 11, 2020, PV cable Often exposed to the sun, the solar system is often used in harsh environmental conditions, such as high temperature and ultraviolet radiation. In Europe, sunny days will lead to the site temperature of the solar system up to 100 ° C. At present, we can use various sealing materials, such as PVC, rubber TPE and high-quality cross linking materials, but unfortunately, rubber cables with a rated temperature of 90 ° C and even PVC cables with a rated temperature of 70 ° C are often used outdoors. At present, the National Golden Sun Project has been launched frequently, and many contractors choose ordinary PVC cables instead of special cables for solar systems to save costs. Obviously, This will greatly affect the service life of the system.
The characteristics of photovoltaic cable are determined by its special insulation material and sheath material, which we call cross-linked PE. After irradiation by irradiation accelerator, Cable material Its molecular structure will change, thus providing its various properties.
Resistance to mechanical loads
In fact, during installation and maintenance, the cable can be routed on the sharp edge of the roof structure. At the same time, the cable must bear pressure, bending, tension, cross tensile load and strong impact. If the strength of the cable sheath is not enough, the cable insulation layer will be seriously damaged, which will affect the service life of the cable, or lead to short circuit, fire, personal injury and other problems.
