7.5.1.7 Earth-termination system
In earthing a wind turbine, the reinforcement of the tower should always be integrated.
Installation of a foundation earthing electrode in the tower base, and, if existing, in the
foundation of an operation building, should also be preferred in view of the corrosion
risk of earth conductors.
The earthing of the tower base and the operation building (Figure 7.86) should be
connected by an intermeshed earthing in order to get an earthing system with the
largest surface possible. The extent to which additional potential controlling ring
earthing electrodes must be arranged around the tower base depends on whether too
high step and contact voltages must possibly be reduced to protect the operator in
the case of a lightning stroke.
For protective circuits for conductors at the boundaries of LPZs 0A to 1 and higher,
besides shielding against radiated sources of interference, protection against
7.5.1.7 Earth-termination systemIn earthing a wind turbine, the reinforcement of the tower should always be integrated.Installation of a foundation earthing electrode in the tower base, and, if existing, in thefoundation of an operation building, should also be preferred in view of the corrosionrisk of earth conductors.The earthing of the tower base and the operation building (Figure 7.86) should beconnected by an intermeshed earthing in order to get an earthing system with thelargest surface possible. The extent to which additional potential controlling ringearthing electrodes must be arranged around the tower base depends on whether toohigh step and contact voltages must possibly be reduced to protect the operator inthe case of a lightning stroke.For protective circuits for conductors at the boundaries of LPZs 0A to 1 and higher,besides shielding against radiated sources of interference, protection against
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