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Solar Cable Improve The Thermal Characteristics Of Cable Insulation Sheath Material
- Jul 03, 2017 -

Solar Cable technology will become one of the future of green energy technology, solar or photovoltaic (PV) in China increasingly widely used, in addition to the rapid development of government-supported photovoltaic power plants, private investors are also actively build factories, plans to put into production in the global sales Of the solar modules.

The characteristics of the PV cable is determined by its cable insulation and sheathing material. We call it the cross-linked polyolefin material. After irradiation with the irradiating accelerator, the molecular structure of the cable material will change. Aspects of performance. In practice, during installation and maintenance, the cables can be routed on the sharp edges of the roof structure, while the cables are subject to pressure, bending, tension, cross-tensile loads and strong shocks. If the cable jacket is not strong enough, the cable insulation will be severely damaged, thus affecting the life of the entire cable, or lead to short circuit, fire and personnel damage and other issues. Radiation cross-linked material, with high mechanical strength. Radiation cross-linking changes the chemical structure of the polymer, and the thermoplastic material is converted into a cross-linked material. Radiation cross-linking significantly improves the thermal properties, mechanical properties and chemical properties of the cable insulation sheath material, greatly improving the service life of the cable.

In the construction of photovoltaic power plants in addition to the main equipment, such as photovoltaic modules, inverters, step-up transformer, supporting the connection of Solar Cable materials on the overall profitability of photovoltaic power plants, operating safety, whether the same, The following is a brief introduction to the use of cables and materials commonly used in photovoltaic power plants and the use of the environment.

Cable according to the system of photovoltaic power plants can be divided into DC cables and AC cables, according to the use and use of different types of environment are as follows:

1 DC cable

1) The series cable between the component and the component.

2) between the strings and their strings from the parallel distribution between the DC distribution box (confluence box).

3) DC distribution box to the cable between the inverter.

The above cables are DC cables, outdoor laying more, need moisture, anti-exposure, cold, heat, anti-ultraviolet, some special circumstances need anti-acid and other chemical substances.

2 AC cable

1) Connect the inverter to the step-up transformer.

2) Connect the transformer to the connecting cable of the power distribution unit.

3) Power distribution unit to the grid or user connection cable.

This part of the cable for the AC load cable, indoor environment laying more, in accordance with the general selection of power cable selection requirements.

3 PV special cable

Photovoltaic power plant in a large number of DC cable to be outdoor laying, environmental conditions are poor, the cable material should be based on anti-ultraviolet, ozone, severe temperature changes and chemical erosion may be. Ordinary material cables used in this environment for a long time will cause the cable sheath to be fragile and even break down the cable insulation. These conditions will directly damage the cable system, but also increase the risk of short-circuit cable, from the medium and long term, the occurrence of fire or personnel injury is also more likely to greatly affect the system life. Therefore, the use of Solar Cables and components in photovoltaic power plants is very necessary. Solar Cables and components not only have the best weather resistance, resistance to ultraviolet light and ozone erosion, but also can withstand a wider range of temperature changes.