You'll learn the four-part standard structure, risk assessment calculations determining protection level requirements, protection zone concept for coordinated surge protection, Lightning Protection System (LPS) classes I-IV with corresponding design parameters, and. You'll learn the four-part standard structure, risk assessment calculations determining protection level requirements, protection zone concept for coordinated surge protection, Lightning Protection System (LPS) classes I-IV with corresponding design parameters, and. The purpose of this Technical Note is to describe proper protection of SolarEdge products in the field from overvoltage surges caused by lightning strikes, grid overvoltage events and ground faults. Properly installed surge protection can reduce the likelihood of permanent damage to inverter. The intelligent transmission monitoring box series products are designed in accordance with IEC61643-21, EN61643-11:2012, NB/T42150, and IEEE802. These measures can be required for various reasons. In addition to national technical standards and building regulations, the. sign a protection system for the PV system during lightning. A good grounding system provides a low - resistance path for lightning currents to flow safely into the ground. For a Telecom Power Cabinet, the grounding electrode should be installed correctly.