보정계수를 이용한 고저항 지대의 접지설계 방안

Abstract

The breakthrough in the power and telecommunications industry is an important part of our life culture and should continue to develop. In particular, if part of the high-tech industry stops functioning or accidents such as human casualties, damage to equipment, and malfunction of damage occur, the damage can be seen as an unimaginable disaster. Therefore, major equipment should be prevented from being damaged in advance by high-speed discharge of a strong inrush current from the outside or from the indirect induced brain to the site. However, depending on the geological form, the earth resistance is considerably high and the ground age changes are severe, so a grounding design for securing stable and reliable ground resistance is absolutely necessary. In this paper, the ground design method was discussed in the high resistance zone considering the correction factor. This is an example of securing ground resistance required by applying and analyzing the site resistance data measured in the ground resistance program of Korea Electric Power Corp. by measuring ground resistance using the Wenner 4 electrode method and analyzing the site resistance data measured in the ground resistance support program of Korea Electric Power Corp. and substituting the optimal depth and deep ground resistance to the ground resistance calculation formula, and applying correction factors to the calculated composite resistance if the analyzed in depth of land resistance rate is 500 ohms or higher. In today's era, when planning a grounding design, the ground resistance should be measured several times for the grounding design in order to achieve effective grounding suitable for the grounding purpose, and for securing the required ground resistance rate for the earth-pole system and ground-design site.