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Some research have explained the difference of effect between power frequency current with lightening current injecting into earthing network. The surface of the earthing body can be approximately regarded as equipotential surface in the case of power frequency no matter how large the area of an earthing network is, so the total area of the earthing network can be made full use of. This case is different when the earthing body is in contact with the lightning current. The potential of the earthing network is not equal by the agency of the inductance of the earthing body, and the farther away from the point where the lightning current is introduced, the lower the potential on the earthing body. That is only the earthing network around the point where the lightning current is introduced plays a part in dissipating energy, and moreover, the energy dissipation is in proportion to the potential distribution in this area. The technology of Optimized Design of Earthing Network has been introduced in other article and this article concentrates on some key questions about the purpose of Earthing, related parameter affecting earthing network, relation between the number of earth network grids and earthing resistance, characteristics of lightening current, the impulse equivalent radius of the earthing network, relation Between Mesh and Equipotential Contact Coefficient. KeywordsRBS; lightening; Optimized Design

Research on Related Questions about Optimized Design of Earthing Network for Radio Base Station