The lightning arrester for buildings is made from conducting metals like copper and iron. Lightning Arrester for buildingĪ lightning arrester rod is a metallic arrangement used to protect a building from lightning and its surges. Thus, this stops the surge from damaging any device. But when there is a potential breakage, the barrier collapses and the fault current passes to the ground. Under normal conditions, it stops the flow of current. This potential barrier constrains the river and pathways of the current. Thus, the arrester consists of a potential obstacle at the edges of zinc oxide. The disc is then enclosed in an earthenware housing filled with sulfur hexafluoride. This powder is treated and then stuffed into a disc-shaped structure. This material is anesthetized by adding fine powders of insulating oxides. The base material here is zinc, and the oxide manufactured is zinc oxide. These types of diverters are known as gapless surge diverters. The schematic diagram below shows the process. This saves the device from implied damage. ![]() When the lightning takes place, the voltage gap is filled through the breakdown of gaps. The disc is contained inside a translucent porcelain container. It contains a disc that is made conductive on both sides by spraying some conducting material. ![]() The resistance is inversely proportional to the voltage applied at the ends of it. It consists of a ceramic material called Thyrite, which has a variable resistance. These types of lightning arresters are commonly used for extremely high voltage conditions. Hence the fault current passes to the ground. The plate acts as a high resistor to a low voltage value and vice versa for a critical value.Ī voltage of more than 400 volts punctures the impedance. Expressly, here aluminum hydroxide deposits on the aluminum plates. It operates on the basic principles of an electrolytic cell. A resistor is added to stop the fault current even further. In it, air ionizes, and fault current passes through the ground. The gaps protect the device through the corona discharge. The number of gaps depends upon the voltage. It consists of a small series of insulated through an air gap. The schematic diagram above shows the details in brief. Multiple Gap Arrester Multiple gap arrester Hence, the fault current is passed to the earth, and the inherent damage is stopped. This distance is filled with air that ionizes on fault current passage. The distance between the two electrodes is optimum. These two are separated by a small air gap and connected in a shunt between each conductor and earth. This contains two horn-shaded pieces of metal. Thus, it saves potential damage to the device. But the corona discharge mechanism ionizes the air and the fault current passes through it. The air between the spheres heats up and tries to escape. There is a choking coil between the transformer and the ground, which heats up when the voltage rises. The diagram below represents the process in detail. Here, one of the spheres is grounded, and another is connected to the line. In such types of lightning arresters, an air gap is provided between two spheres. Hence, the equipment is saved from potential damage. The process is explicated above in the snippet. In this fashion, the fault current passes to the earth. When there is a higher voltage on the line, the air ionizes, producing a spark. These two rods get connected to the earth and the line directly. In the before-mentioned type, there is a gap between the end of the two rods. ![]() It is one of the simplest types of Lightning Arresters. Let us focus on some primary and important types of Arresters. Heeding these above factors, there are twelve types of lightning arresters. The choice of lightning arrester depends upon the following factors: Let us discuss some types of lightning arresters. This renders a low impedance path to the ground that saves the electrical system from fault current damage. As per standard definition, a system of lightning protection for homes uses a combination of highly conductive copper and aluminum alloys. We at Renown Earth produce a Home Lightning Protection System. A typical lightning arrester consists of a high-voltage terminal at the top, followed by a low-voltage terminal at the ground. This device uses a technology called Corona discharge.Ĭorona Discharge Technology uses the mechanism of discharge of high voltage in a short period by ionization of nearby air ions. Introduction: What is Lightning Arrester?Ī Lightning Arrester is a device used to protect a variety of electrical equipment and systems from the effects of lightning.
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