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Grounding Plant Control

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Inspection and Controls of Grounding Plant Control and Measurement

Grounding Plant Control and Measurement

Grounding is the method of connecting the electrical devices to the grounding system which is buried in the ground with the help of a conductor against any danger of electric leakage. If there is an electrical leakage in the device, the risk of crashing is thus eliminated. When a device with an electrical leakage is touched, the electrical current passes through the ground line, which is less resistant, than the human. Soil is a conductive mass of unlimited size.

Earthing systems installed in electrical networks are designed to ensure that in case of any failure, short-circuit currents are passed in such a way that they do not endanger the safety of people. In order to establish an accurate and reliable grounding system, it must be well calculated and designed in accordance with the conditions. When the grounding plant is installed and the grounding calculation is performed, currents that cross the ground rather than the voltage of the plant are taken into account.

In order for the grounding system to function, the electrical resistance from the housing to the ground must be low enough. The main resistance here is the resistance from the grounding conductors embedded in the soil to the soil. To reduce this resistance, the grounding electrodes are deeply embedded.

In general, three types of grounding methods are used in plants: protection grounding, operational grounding and lightning grounding. In high-voltage plants, protection grounding is performed to protect people against high-voltage contact. Operation grounding is the method of grounding a point of the operating circuit in electrical installations. Lightning grounding is used to protect electrical installations against lightning.

Grounding Plant Control and Importance of Measurement

The purpose of the inspection and control of the grounding facilities is to evaluate the robustness of the plant and to determine whether the touch voltage is within the permissible limits.

The stability of the plant is determined by measuring the spreading resistance, or the grounding resistance. Whether the grounding system is sufficient for touch voltage cannot be determined by measuring the ground resistance. Although different types of earthing and grounding systems have the same grounding resistance, they show different characteristics in terms of touch voltage or step voltage. The element that determines the touch stress is the amount of potential distribution within the soil if current flows through the grounders. These issues are included in the Regulation on Grounding in Electrical Installations issued in 2001.

This regulation has been enacted in order to ensure the establishment, operation and supervision of earthing facilities for alternating current and direct current electrical installations with certain values ​​in order to ensure the safety of people in terms of safety of life and property. In this regulation, grounding criteria and rules for high voltage electrical power plants and low voltage electrical plants, which have different characteristics, are discussed separately.

In the Annex of the Regulation on the Health and Safety Conditions in the Use of Work Equipment issued by the Ministry of Labor and Social Security, entitled bakım Maintenance, repair and periodic checks Ek (Annex-III), the subject of grounding plant control and measurement is the subject of installations. Accordingly, the persons who will perform such tests must be electrical engineers, electrical technicians or high technicians. This is important in terms of the validity of the measurements and the acceptance of the reports to be issued.

The legal regulations to be observed during the grounding plant control and measurement are:

  • Regulation on Grounding in Electrical Installations
  • Regulation on Electrical High Current Plants
  • Electrical Internal Facilities Regulation

In short, each earthing plant must be inspected and inspected prior to commissioning during the installation and operation phase. Apart from the normal earthing system, each system must be systematically measured and the earth resistance calculated.

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Grounding Facility Control and Measurement