The module SHIELD is based on a 3D graphical application and consider the most diffused algorithm for the evaluation of the protected volume from lightning strokes.The module NETS is based on the phase components method and integrates specific routines for the calculation of the parameters of lines, cables and transformers.These four modules can import data from “dxf” files, and also export data and results in “dxf” files with a full interactivity with CAD tools.The implemented PEEC method solves the Maxwell equations in full wave conditions taking into account the Green functions for propagation, the Sommerfeld integrals for the earth reaction, the Jefimenko equations for electric and magnetic fields and moving from the frequency to the time domain by means the Fourier transforms.This method allows the analysis of complex scenarios including external parameters such as voltages, currents, and.The application field of these four modules is wide because they are based on the PEEC (Partial Element Equivalent Circuit) method, a numerical method for general applications powerful and flexible and perfectly suitable for engineering purposes.The modules GSA, GSA_FD, XGSA_FD and XGSA_TD integrate the module SRA (Soil Resistivity Analysis) and XGSA_TD also integrates the module FA (direct / inverse Fourier Analysis).

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