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Solar Cable Long Life, Stable Performance
- Oct 10, 2017 -

In recent years, Solar Cable (PV) power generation has been widely used, rapid development, in the construction process of photovoltaic power plant in addition to the main equipment, such as photovoltaic components, inverters, step-up transformers, supporting the connection of photovoltaic cable materials to the overall profitability of photovoltaic power plants, operating safety, efficiency, also plays a vital role, The following is a detailed introduction to the use and environment of the common cables and materials used in PV power plants.

Cable according to the Photovoltaic power station system can be divided into DC cable and AC cable, according to the use and use of the different classification of the environment as follows:

DC Cable

(1) A series of cables between components and components.

(2) The parallel cable between the group string and its group to the DC Distribution box (confluence box).

(3) Cable between DC distribution box and inverter.

The above cables are DC cable, outdoor laying more, need moisture, sunscreen, cold, heat, anti-ultraviolet, some special environment also need to acid alkali and other chemical substances.

A large number of DC cables in photovoltaic power stations need to be laid outdoors, and their cable materials should be based on anti-ultraviolet, ozone,Solar Cable drastic temperature changes and chemical erosion conditions. Ordinary material cable in this kind of environment for a long period of time, will lead to fragile cable sheath, or even the breakdown of cable insulation layer. These conditions will directly damage the cable system, but also increase the risk of short-circuit the cable, in the long run, the possibility of fire or personnel damage is higher,Solar Cable greatly affecting the system's service life.

Therefore, it is necessary to use photovoltaic cables and components in photovoltaic power plants. With the continuous development of photovoltaic industry, PV supporting parts market gradually formed, in terms of cable, has developed a variety of specifications of photovoltaic professional cable products. The recently developed electron beam cross link cable, with a rated temperature of 120 ℃,Solar Cable can withstand severe climatic conditions and withstand mechanical shocks. Also such as Radox Cable is based on international standards IEC216 developed a special solar cable, in the outdoor environment, the service life is 8 times times the rubber cable, PVC cable 32 times times. Photovoltaic cables and components not only have the best weather-resistant, ultraviolet and ozone-resistant, but also can withstand a larger range of temperature changes (e.g. from -40~125℃). In Europe,Solar Cable technicians pass tests that can be measured at temperatures up to 100~110℃.

In most cases, the DC cable used in photovoltaic power station is long term outdoor work, which is restricted by the construction condition, and the cable connection is used to connect the plug. Cable conductor material can be divided into copper core and aluminum core. Copper core Cable has better antioxidant capacity than aluminum, long life and stable performance. The characteristics of small pressure drop and low power loss; in the construction because the copper core flexible, the allowable curvature radius is small, so easy to turn, wear pipe easily, and copper core anti-fatigue, repeated bending is not easy to break, so the wiring is convenient; at the same time, the mechanical strength of copper core is high, Can withstand a larger mechanical pull, to the construction of a great convenience, but also for mechanized construction to create conditions. In contrast, aluminum-core cable, because of the chemical properties of aluminum, the installation of joints prone to oxidation phenomenon (electrochemical reaction), especially prone to creep phenomenon, easy to lead to failure.

Therefore, the copper cable in the use of photovoltaic power plants, especially the direct laying cable power supply field, has a prominent advantage. It can reduce the accident rate low, improve power supply reliability, construction operation and maintenance convenience. This is the reason why the copper cable is mainly used in underground cable power supply in China.

PV Power station installation and operation maintenance, the cable may be under the ground in the soil, weeds, the roof structure of the sharp edge of the wiring, bare in the air,Solar Cable the cable may withstand a variety of external shocks. If the cable sheath strength is not enough, the cable insulation layer will be damaged, thus affecting the entire service life of the cable, or lead to short-circuit, fire and personnel injury hazards such as the emergence of problems. Cable research and technical personnel found that the radiation cross linked materials,Solar Cable compared to radiation treatment prior to higher mechanical strength. Cross-linking process changes the chemical structure of the insulation sheath material polymer, the fusible thermoplastic material is converted into non fusible elastomer material, and the cross link radiation significantly improves the thermal properties, mechanical properties and chemical properties of the cable insulating material.