CG2470LSSNTR

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This article focuses on the application field and working principle of CG2470LSSNTR, a gas discharge tube (GDT) arrester made by China. It is particularly suited for overhead high-voltage power transmission lines and is actively used to protect the insulation against overvoltage.

Gas discharge tube arresters (GDTs), also known as spark gap arresters, are devices that are used to protect insulation elements from overvoltages that occur in the power system as a result of lightning strikes or switching surges. They are often used in combination with varistors, which offer protection from transients, also known as surge voltages. GDT arresters are the primary devices used to protect insulation from transient voltages, as they have a very low breakdown voltage and can provide an extremely fast response time compared to other types of arresters.

GDTs use a medium to create a conductive discharge path when the voltage in the power system reaches a certain level. This medium typically consists of a mixture of air and an insulating gas such as sulfur hexafluoride (SF6). As the voltage increases, the electrical field in the gas creates a conductive channel. This conductive channel provides a path of lower resistance than the one created by the insulation, allowing for the current in the power system to discharge safely.

The CG2470LSSNTR GDT arrester utilizes different techniques to provide a higher degree of protection than other types of arresters. It is designed for use in overhead high-voltage power transmission networks with voltages up to 36 kV. The arrester is composed of a tubular zinc oxide element with a chamber containing sulfur hexafluoride gas and a sparking gap. It has a very low breakdown voltage and excellent response time, making it an ideal choice for providing protection against transient overvoltages.

The working principle of the CG2470LSSNTR GDT arrester is relatively simple. When a high voltage is applied, it creates an electric field that causes a rapid increase in gas pressure and an arc discharge in the GDT. During this process, the overvoltage is diverted to the sparking gap or ground electrode. The sparking gap then serves to conduct the current to the ground plane, preventing the overvoltage from reaching any other parts of the network.

The CG2470LSSNTR GDT arrester offers a number of advantages over other types of arresters. It is capable of providing protection in overhead power transmission lines operating up to 36 kV, has a low breakdown voltage, and a very fast response time. In addition, it is lightweight and has a long service life. This makes it an ideal choice for protection from lightning and switching surge overvoltages.

In conclusion, the CG2470LSSNTR is an excellent example of a gas discharge tube arrester designed for use in overhead power transmission applications. It offers a number of advantages over other types of arresters, including a very low breakdown voltage, fast response time, and a long service life. As a result, it is an ideal choice for providing effective protection from lightning and switching surge overvoltages in overhead power transmission networks.

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