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In this paper, the results of an experimental study and finite-element method (FEM) of the impulse characteristics of simply built practical earthing systems consisting of 2, 3, and 4 rods are reported. These electrodes are installed at three outdoor test sites having nonuniform soil and different soil profiles to provide variation in the result analysis. The tests on these electrodes were intended...
In this paper, the influences of the length of grounding electrodes on the lightning transient characteristic were analyzed. The effect of effective length of grounding electrodes is demonstrated for 2.6/50 mus and 4.5/50 mus time duration of the wavefront. The effect of the soil ionization has been taken into account by dynamic change of the radius of the grounding conductor.
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