What are the outstanding characteristics of solar photovoltaic cables ?

What are the outstanding characteristics of photovoltaic cables?

We always wonder, why can't we buy ordinary cables at a cheaper price instead of photovoltaic cables? After we read the characteristics of photovoltaic cables, we will understand what is value for money.

A large number of DC cables in solar power photovoltaic power plants need to be laid outdoors, and the environmental conditions are harsh. The cable materials should be determined according to the resistance to ultraviolet rays, ozone, severe temperature changes and chemical erosion. The long-term use of ordinary material cables in this environment will cause the cable sheath to be fragile, and even decompose the cable insulation.

These conditions will directly damage the cable system, but also increase the risk of short-circuiting the cable. In the medium and long term, the possibility of fire or personal injury is also higher, which greatly affects the service life of the system.

Therefore, it is very necessary to use photovoltaic special cables and components in photovoltaic power plants. Special solar cables and components for photovoltaics not only have the best weather resistance, UV resistance and ozone resistance, but also can withstand a wider range of temperature changes.

 Principle of cable design and selection

(1) The withstand voltage of the cable should be greater than the maximum voltage of the system. Such as 380V output AC cable, choose 450/750V cable.

(2) For the connection between the photovoltaic square array and the square array, the rated current of the selected cable is 1.56 times the maximum continuous current in the calculated cable.

(3) For the connection of the AC load, the rated current of the selected cable is 1.25 times the maximum continuous current in the calculated cable.