Transmission of solar energy generated or converted from heat or sunlight requires a robust cabling infrastructure capable of managing solar energy processing applications. For the industry diversifies from traditional methods of generating electricity, the demand for high-efficiency solar cables continues to grow, supported by impressive annual growth rates. As the key to solar power plants, cables are required not only to connect equipment, but most importantly to transmit energy to power essential services such as utilities, commercial and household appliances.
Considerations of Solar Cables
The thermal properties of electrical insulating materials are evaluated by the IEC/EN 60216 series of standards. These tests were developed to better understand the in service experience. Part 1 includes accelerated weathering test procedures and evaluation methods, and Part 2 details the determination of thermal properties.
The aging rate is calculated by physicochemical models, in particular by the Arrhenius equation. Assume a linear relationship between the reaction rate constant and thermodynamic temperature. So the time and temperature dependence required to induce a change in a predetermined characteristic.
The EN 50618 solar cable standard is the most commonly used and applies to all LSZH, flexible, single-core power cables with cross-linked insulation and jackets. The IEC 62930 standard was published in 2017 and applies to the same range of cables as the EN standard.
If you are looking for a standard that will give you more flexibility in cable design, then the IEC standard is more suitable for your needs. Because it can be applied to a wider range, including options to choose class 2 conductors, extended sizes up to 400 square meters, multi-core, halogen-containing designs, higher storage temperatures and easier localization to international standards.
Weather resistance and UV resistance
Essentially, solar cables must be outdoors, so they are constantly exposed to these elements. Over time, stress can cause premature aging or damage to cabling systems.
Changes in color and loss of material flexibility in the cable jacket are common symptoms of UV aging. The polymers used in solar cables often contain UV stabilizers to provide a layer of long-term protection. Approval to evaluate and verify the presence of this property is key to ensuring that the specified and installed cable can withstand prolonged exposure.
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