In simple terms, soil resistance is the resistance of the soil during the passing of the electrical current. Earth resistance is measured using a ground resistance tester. This device is called Earth Megeri. Soil is a weaker conductor than known conductors. However, if the area for the electric current is large enough, the resistance of the soil decreases and the soil becomes a good conductor. Therefore, there is a resistance between the conductors and the ground in the electrical systems. These measurements and calculations must be made before an electrical installation is installed.

In accordance with the rules of physics, the resistivity of the soil is the resistance of one cubic meter of soil. The structure of the soil on the resistance and the amount of water in it is important. The resistance of an electrode to earth depends on the resistivity of the earth. For example, resistance in swamps is 30 ohms, clay soils are 100 ohms, and stony soils are 3000 ohms.

Insulation of conductors against earth is measured with soil resistance tester (with earth meager), and insulation of conductors with each other is measured with insulation test device (insulation meager).

The conventional earthing devices used in earthing measurements have three electrodes: earth electrode (E), current electrode (C) and potential electrode (P). The most common method of measurement is two piled measurement methods. The P and C electrodes are deeply embedded in the soil. The distance between them should be no more than 10 meters. If the resistance of the soil is low, the resistance of the earthing is low.

With the grounding process, all non-stressed installation parts in the electrical system are connected to the earth conductor and to a conductor (electrode) placed in the ground. In this way, the leakage currents and static electricity on the metal parts of the devices are transferred to the ground. Grounding of electrical systems is obligatory in terms of human health and property safety in the related legal regulations. In this context, neutral points of generators and transformers, lightning rod facilities, all networks in substations, telephone exchanges, antennas, tanks with liquid and high gases and their metal parts, high chimneys and cable transport systems, uninterruptible power supplies, computers, lighting fixtures are grounded in metal junction boxes and ATMs.

Our company within the framework of electrical safety examinationsconducts earthing measurements in accordance with the relevant regulations, standards and test methods published by domestic and foreign organizations.