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A measure commonly used in the national power system to prevent overvoltage is the use of overvoltage protections implemented in PV installation inverters.
In addition, the protection level at the inverter is increased if the overvoltage occurs at one of the other strings. When excessive voltage is applied, voltage falls via the cable inductance. If the arrangement is not ideal, the protection level at the inverter is increased (see Fig. 6).
Also, special features of combining overvoltage protection devices with SMA inverters are described. The document covers lightning protection in as far as it influences overvoltage protection. Lightning protection systems are intended to prevent damage to buildings from lightning strikes.
Overvoltage protection serves to prevent damage to electrical and electronic devices as a result of excessive voltages. Overvoltage protection devices (surge protection devices, or SPD for short) generate equipotential bonding between the connected conductors when excessive voltage is applied.
The International Electrotechnical Commission Mission: to prepare and publish international standards for all electrical and electronic technololgies
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In addition to national technical standards and building regulations, the system insurer can also require overvoltage protection. An expert on lightning protection must determine for each PV
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