Storm surge damage – one of the most common causes of damage to PV systems
Fluctuations often cause system components such as modules, inverters and monitoring systems to be destroyed. Financial concepts are terrible. Replacement of a defective inverter, new PV system installation, loss of revenue due to downtime
Since the application areas of photovoltaic systems are designed to cover the entire surface at all times, they must be integrated with the existing TT grounding system.
For example, in the installation shown in Figure 1 below, there is no supply outlet protected by the residual current protection relay on the consumer side.
At first glance, this seems to be a problem to be solved with the network operator. However, according to DIN VDE 0100-712, a cable / conductor-powered installation must have an automatic device that opens the circuit.
PROTECTION OF SOLAR PANELS FROM LIGHTNING
Photovoltaic systems that generate renewable energy are at risk of lightning due to installation site and installation site Protection of buildings and photovoltaic systems; It is important in terms of increasing the residence time of the facilities and the security of the investments. These areas can be protected from lightning by means of catch points to be placed according to protection angle and the length of which will be determined.
PROTECTION AGAINST OVERVOLUTION
The biggest factor in the deterioration of photovoltaic systems and frequency converters is usually the high voltage caused by lightning.
In such cases the user of the photovoltaic system, as well as high repair costs are faced. In order to prevent these damages, lightning and high voltage protection, which are designed together, should be used.
NORMS AND SPECIFICATIONS
When installing photovoltaic (PV) systems, the applicable norms and regulations regarding high voltage protection must be observed. The installation of a PV system and the selection of surge protection modules are described in DIN VDE 0100 Part 712 / E and DIN IEC 64/1123 / CD (Installation of low voltage systems; Special systems; Photovoltaic supply network). VdS damage protection The 2010-Vds publication recommends the use of protection class III, lightning and high voltage protection of> 10 Kw for PV system buildings.