Many customers often have such questions: Why in the installation of pv systems, the series-parallel connection of pv modules must use dedicated pv DC cables instead of ordinary cables?
In response to this problem, let’s first look at the difference between pv DC cables and ordinary cables:
1. cable core:Ordinary cables use pure copper wires, which are yellow in appearance and can only meet basic electrical conductivity requirements.The pv DC cable uses tinned copper wire, and the process is more complicated than bare copper wire.This wire has a silver appearance.The tinned copper wire is softer and has good electrical conductivity. Compared with bare copper wire, it can prevent the rubber shell from sticking, and its corrosion resistance and oxidation resistance are stronger, which can greatly extend the service life of weak current cables.
2. Insulating shell material:Ordinary cables generally use XLPE insulation sheath.PV DC cables are insulated and sheathed with irradiated cross-linked polyolefin.The key index “irradiation” is usually after being irradiated by a radiation accelerator, the molecular structure of the cable material will be changed to obtain stronger performance.For example:
3. In the high temperature and cold environment, the pressure and bending force resistance becomes stronger, and it has a certain degree of flame retardant effect, which is not easy to produce open flames, etc.Moreover, the special pv cable will have an additional layer of insulating shell protection than ordinary cables.
In summary, the pv DC cable has stronger life and durability than ordinary cables, and is a connecting cable more suitable for pv power generation systems. Therefore, considering the safety and stability of the pv system, you must choose a professional one. PV DC cable.
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Post time: Jul-28-2023