Resistivity Analysis In Layered Soils

Mohammad Nazri, Razali (2012) Resistivity Analysis In Layered Soils. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

All electrical or electronic equipment must have a grounding system to protect and maintain the life cycle expectancy of device. Ground or earth is defined as a conductive mass of earth in which its electrical capacity at any point is usually taken as zero. Besides that, a grounding grid built using conductive materials buried underground horizontally to make a ground electrode, supported is typically by a number of vertical rods connected to the grid to provide low impedance current path. The purpose of grounding is to protect an electrical system and equipment when fault happen and minimize the ground potential rise during fault. In addition, there are some factors that affect grounding such as resistance, moisture, mineral salt contained in soil and weather. Furthermore, electrode grounding systems are buried in the soil and the resistance depend on the soil characteristics so, this experiment is carried out to analyze the effect of different types of soil to the performance of a grounding system. The main purpose is to construct an experiment for different type of soil using a scaled-down model. There are three types of soils that have been used in this experiment which are uniform, second layer and multi layer soils. This will include investigation of ground resistance for different types of soil, soil structure and suitable method to examine the resistivity of soil. The significant of this project is to identify the differences types of soil make on the resistivity and conclude on which type of soil gives better performance in terms of low value resistivity. Factor affecting the soil resistivity are the condition of the soil, moisture, weather, and minerals contained in the soil. In conclusion, three layer soils provide the best reading than other types of soil.

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