Building cost-effective and profitable photovoltaic power plants is the most important goal and core competency of all solar manufacturers. In fact, profitability depends not only on the efficiency or high performance of the solar module itself, but also on a series of components that appear to have no direct relationship with the module, and the lifespan of a PV plant is also closely related to these components.Today we are going to talk about photovoltaic cables, one of the hidden dangers of photovoltaic power plant accidents.
We divide cable-related hazards into four broad categories:
Damaged Cable Insulation
The characteristics of photovoltaic cables are determined by the special insulating materials and sheathing materials for cables. After being irradiated, the molecular structure of the cable material will be changed, thereby providing its performance in all aspects. During installation and maintenance, cables will be placed on the sharp edges of the roof structure, while the cables are subject to bending and stretching. If the cable jacket is not good enough, the cable insulation will be severely damaged, affecting the service life of the entire cable, or causing problems such as short circuits, fire and personal injury hazards.
Causes of insulation damage
Poor cable quality and impurities inside the insulation
Poor quality cable accessories
Production process is not strictly controlled
The cable manufacturing environment is not good, resulting in impurities in the cable insulation
Unskilled and inexperienced worker to install it
The long-term overload operation of the cable will cause the temperature to increase, or exceed the maximum temperature of the cable, which is likely to cause the cable insulator to age. Once the cable insulator ages, it is easy to cause the cable to catch fire and even explode.
Improper Cable Conductor Materials
There is a national standard for the conductor material and resistance, the average thickness of the sheath, and the outer diameter. If the cable materials do not meet the national standards, although it seems without any problem in the short term, there is a great safety hazard.
High temperature of the cable
The cable will catch fire due to excessive temperature outside the cable.
It is crucial to select the cable with high quality. A long run investment. You gain what you paid.