Surge Protection for Photovoltaic, PV, Solar Systems

Application principle

Surge Protection for Photovoltaic, PV, Solar Systems

* Photovoltaic Application Surge Protection
* Protection of Cells & Inverter DC side

Application principle
Providing power with photovoltaic solar panels is tremendously interesting in the context of renewable energy sources, as regards economical LV photovoltaic systems connected to the public electricity network. Because of their exposition , frequently in isolated sites and of the extended surface of photovoltaic systems (PV), lightning strikes are a major components in the risk to be assumed, both for the direct effect of lightning on the structures, and of the surge overvoltages on the installation. Cells are generally associated with inverters. Leitai has developed a specifc Din Rail product to protect DC side of cells and inverters against surge in power plant or residential application. In case of indirect surge , the cells, their electronic components and semi-conductors in the inverters which are essential and expensive equipment could be damaged. The reason is because the electronic components can not support the high value of over voltage.
Detailed description
With the MOV-MOV (Metal Oxside Varistor), the overvoltage will be limited at the value of the voltage protection level of the LEITAI LYD4-C40 DC surge protector. Our surge protector, as recommended in standards and guides, insure all protections (between + and-, + and Ground, - and Ground). On each surge arrester, as option, an available auxiliary contact will inform the end life status to ensure a maximum effciency.
One easy solution
With this solution, many cells in power plant and residential application have been protected. If you don't protect your cells, in case of several big surges, your cells will be completely damaged and in case of many small surges without visual damages for you, your effciency will go down over the years. You should use a surge protection to have a better return on investment. Class C surge protection for photovoltaic
Discharge current In: 20kA / Imax: 40kA
Plug-in modules
Remote signal option
IEC 61643-1 compliance
LYD4-C40 DC series are Class C Surge Protection Devices, they designed to protect against lightning surge voltages in photovoltaic power supply networks. These units must be installed in parallel on the DC networks to be protected and provide common and differential modes protection. The LYD4-C40 DC series are availa-ble for the main operating voltages in photovoltaic : 500, 800 and 1000 Vdc. The use of Class C Surge Protection Devices are recommended at both ends of the DC power supply line (solar panel side and inverter/converter side), especially if the line routing is external and long. The electrical diagram of the LYD4-C40 DC series are based on high energy MOVs equipped with specific thermal disconnectors and related failure indicators. A remote signal feature is also available
The LYD4-C40 DC series are made with plug-in modules to allow a fast and easy maintenance in case of fa-ilure (disconnection from the DC network).



Shanghai Leitai Electric Co., Ltd. Add: Gaoqian Industry Park, Xiangyang, Yueqing 325619 Zhejiang, China
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