What is an earth well? An earth well is a hole that is dug deep into the ground to reach the relative humidity of the soil. Then a copper plate is placed vertically as an earth electrode inside it so that the maximum contact surface with the soil is established. In addition, the surface of the plate is covered with bentonite materials or materials that reduce the soil resistance. Copper connection wires connect the welded plate to the test box on the ground. to connect all electrical devices to it. The first goal is to create an electrical circuit with zero potential and low resistance. A ground well is one of the ways to create such a circuit. What is the Earth System? The word earth means connecting the body of an electrical device to the ground. This process is carried out in order to protect people and devices against excessive voltage produced in the body of electrical equipment and also in case of lightning striking the building, which has a very high and dangerous voltage. which is essential for safety to be neutralized directly on the ground. As a result, it is necessary to use an earth well and an earth system.
Earth, connection to the earth system The use of the ground system is one of the things that plays an effective role in reducing electrocution incidents. Therefore, its correct inspection and testing is necessary. Iran Standard and Quality Inspection Company can inspect and test ground wells, lightning arresters, electrical panels and electrical safety systems with the necessary manpower and equipment. Measurement of well resistance and examination of standard requirements and system connection and other parameters are checked and if necessary corrective solutions are provided to the applicants to reach the ideal situation. Purpose of land use • Protection of human life and safety • Increased protection and safety in electrical and electronic equipment • Creating suitable conditions in the work environment • Prevents contact voltage and unwanted voltages and lightning • Eliminates excess voltage • Electrical functionality is ensured • Improve and control noise Why is there a need for a good ground test? Earth resistance measurements for earth electrode systems should be made during electrode installation and at intervals thereafter. This process ensures that the ground resistance does not increase over time. If the ground is poor, not only does the risk of equipment failure increase, it is also dangerous. Facilities must have ground electrical systems. In this case, there is a safe path to ground when there is a lightning strike or high voltage. Necessity of measuring and testing the ground well Inspection and testing of earth wells is done according to Article 13-2-5. According to this article, all electrical installations must be tested before operation or after any major changes to ensure compliance with laws and regulations. Also, according to paragraph C 1-9-4, topic 13 of the National Building Regulations, when the electrode is placed on the ground, it is necessary to periodically measure its resistance against the mass of the entire ground with the help of devices. These tests show the change in electrical resistance, if the conditions are according to
