7.5.1.5 Protection measures
The lightning protection zones (LPZs) concept is a structuring measure for creating
a defined EMC environment within a structure (Figure 7.85). The defined EMC
environment is specified by the electromagnetic immunity of the used electric
equipment.
Being a protection measure, the LPZs concept includes therefore a reduction of the
conducted and radiated interferences at boundaries down to agreed values. For this
reason, the object to be protected is subdivided into protection zones. The protection
zones result from the structure of the wind turbine and should consider the architecture
of the structure. It is decisive that direct lightning parameters affecting LPZ 0A from
outside are reduced by shielding measures and installation of SPDs to ensure that the electric and electronic systems and devices situated inside the wind turbine can be
operated without interference.