Selection of photovoltaic cablesIssuing time:2021-05-19 09:24 The cables used in the low-voltage DC transmission section of solar photovoltaic power generation systems have different requirements for the connection of different components due to different operating environments and technical requirements. The overall factors to be considered include the insulation performance, heat resistance and flame retardancy, aging resistance, and wire diameter specifications of the photovoltaic cables. The specific requirements are as follows: Zhiheng New Energy Photovoltaic Cable 1. The connecting cable between solar cell modules is usually directly connected using the connecting cable provided with the module junction box. If the length is not enough, a dedicated extension cable can also be used. According to the different power levels of the components, this type of connecting cable has three specifications: cross-sectional area of 2.5m ㎡, 4.0m ㎡, and 6.0m ㎡. This type of photovoltaic cable connection uses a double-layer insulation sheath, which has superior resistance to UV, water, ozone, acid, and salt corrosion, as well as excellent all-weather and wear resistance. 2. The connecting cable between the battery and the inverter requires the use of UL tested multi-stranded flexible cables, which should be connected as close as possible. Choosing short and thick cables can reduce system losses, improve efficiency, and enhance reliability. 3. The connecting cable between the battery array and the controller or DC junction box also requires the use of UL tested multi-stranded flexible wires, and the cross-sectional area specification is determined based on the output * large current of the array. The cross-sectional area of the DC cable in the designated area is determined based on the following principles: the connecting cable between solar cell modules, the connecting cable between batteries, and the connecting cable for AC loads. The rated current of the selected cable is generally 1.25 times the maximum continuous working current of each cable; The connecting cables between the solar cell array and the array, as well as the connecting cables between the battery (group) and the inverter, are generally selected with a rated current of 1.5 times the maximum continuous working current of each cable. Ningbo Zhiheng Cable Co., Ltd. was established on January 1, 2020, specializing in research and development, production, and sales of various new energy photovoltaic cables. It has obtained the latest German TUV photovoltaic cable certifications EN50618 and IEC62930, with main production specifications ranging from 1.5mm ² To 25mm ² We have a development, design, and production team with over 15 years of senior experience in photovoltaic cable products. We have always adhered to the business philosophy of "intelligent innovation, eternal quality!" to provide customers with quality assurance and cost advantages. The products are mainly sold to domestic manufacturers of supporting junction boxes such as Longji Photovoltaics and Jingke Photovoltaics, as well as photovoltaic power station engineering manufacturers. We focus on global sustainable development, with the responsibility of promoting affordable photovoltaic grid access and promoting green energy, providing comprehensive solutions from photovoltaic products to photovoltaic applications, continuously exploring and innovating, leading the progress of the photovoltaic industry, and using solar energy to benefit all humanity. |