Medium and high voltage surge arresters are important electrical equipment used to protect power equipment and power systems, and are also an indispensable key component in protecting modern power networks. In order to better understand the function and superiority of medium and high voltage arresters, this article will introduce the principles, types, characteristics and applications of medium and high voltage arresters.1. The principle of medium and high voltage arresters The medium and high voltage arrester is a kind of electrical equipment whose main function is to protect equipment and lines from lightning overvoltage in the electrical system. When lightning overvoltage occurs in the power system, the medium and high voltage arrester can automatically discharge and introduce the overvoltage into the earth or the ground wire, thereby protecting the safety of electric equipment and people. The discharge principle of medium and high voltage arresters mainly depends on the principle of gas dialysis and resistance characteristics. When the voltage in the power system exceeds the limit voltage of the medium and high voltage arrester, the active gas in the medium and high voltage arrester is ionized to form electrons and ions, the electrons flow rapidly to the anode, and the ions flow to the cathode, forming a current, triggering the discharge of the arrester, and Consume overvoltage energy.2. Types of medium and high voltage arresters According to different design principles and uses, medium and high voltage arresters can be divided into various types, as follows: 1. Radio interference repeater lightning arrester: used to protect receiver equipment from lightning impact and lightning overvoltage. 2. High voltage drop arrester: used to protect the high voltage drop coil from lightning overvoltage. 3. Low-voltage switchgear arrester: used to protect low-voltage switchgear equipment from lightning overvoltage. 4. Overhead line arrester: used to protect overhead transmission lines from lightning overvoltage and consume most of the energy of the overvoltage. 5. Lightning arresters for power transformers: used to protect power transformers from lightning impact and overvoltage, and improve the reliability and safety of power systems.Three, the characteristics of medium and high voltage arresters 1. It can effectively protect power equipment and power system from lightning overvoltage and electrical interference, and protect equipment and personal safety. 2. Medium and high voltage arresters have the advantages of fast response, strong durability, good arc resistance, etc., and have good performance and reliability. 3. The design of medium and high voltage surge arresters strictly complies with international and domestic standards, and can be customized according to customer requirements to meet different needs. 4. The medium and high voltage surge arresters are made of environmentally friendly materials, which are non-toxic and harmless, and friendly to the environment.Fourth, the application of medium and high voltage arresters Medium and high voltage arresters are widely used in power systems, petrochemicals, railway transportation, communication networks, buildings and other fields to protect equipment and personal safety. In the power system, medium and high voltage arresters can protect power equipment such as transformers, complete switchgear, and automation devices from lightning overvoltage, and improve the safety and reliability of the power system. In the field of petrochemical industry, medium and high voltage arresters can be used for lightning protection of oil well platforms, drilling equipment, oil pipelines and other facilities to avoid fires, explosions and other accidents caused by lightning overvoltage. In the field of railway transportation, medium and high voltage arresters can be used in railway electrification systems to protect railway lines, tunnels and vehicles from lightning overvoltage, and improve the safety and reliability of railway operation. In the field of communication networks, medium and high voltage arresters can be used to protect communication base stations and other equipment from lightning impact and interference, and ensure the stable operation of communication networks. In the field of buildings, medium and high voltage arresters can be used for lightning protection of high-rise buildings, large factories and other facilities to ensure the safety of buildings and people. To sum up, medium and high voltage surge arresters are very important electrical equipment and are indispensable in modern power networks. By understanding the principles, types, characteristics and applications of medium and high voltage arresters, we can more fully understand the importance and value of medium and high voltage arresters, better use and maintain this equipment, and protect electrical equipment and personal safety.
Post time: Jun-03-2023