| Title |
Reduction of the the Ground Surface Potential Gradients by Installing Auxiliary Grounding Grids |
| Authors |
Bok-Hee Lee ; Ju-Hong Eom ; Seung-Chil Lee ; Hyo-Jin Kim |
| Abstract |
The present paper describes a technique for installing an effective grounding grids, the major objective is forced on the experimental evaluation of the performance and characteristics with the arrangement and installation method for grounding grids consisting of the means to protect electric shock, electronics and computerized facilities against lightning, switching and ground fault surges. The study is oriented on two major areas: (1) the analysis of the ground surface potential gradient with the arrangement of grounding grids, (2) the control of the dangerous ground surface potential rise. The experiments were carried out with the impulse currents as a function of the installation method or arrangement of grounding grids. An installation method of the inclined auxiliary grounding grid was proposed to overcome the drawbacks of equally spaced grounding grids, i.e., an appropriate design concept for the installation of grounding grids was found out. It has been shown that the installation of the inclined auxiliary grounding grid can also result in a more than 50% decrease in the maximum potential gradient on the ground surface and enhance the level of safety for persons and electronic equipments. |