The effective factors of ground impedance and ground impedance in electric systems

Although the ground system rarely perceptives their existence during normal operating, they can be effective and make their duty when a failure break out. So ground is a secret system which may not be and see in operating, so that ground should not ignore and should desire it in electric system.Firstly, ground?s definition is made and different types of grounded observe in this work. These grounded?s using areas observe. According to kinds, their effective types are shown and ground resistances values are clarified for being under danger limitation in some failure conditions. After that, because of different electrode covered manners,measurement is made in different areas. Necessary conditions are observed in different systems. Conlusively, ınformation about measuring and controlling ground resistance are given in ground system.