2818960 Circuit Protection

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Gas discharge tube arresters (GDTs), also known as gas tube arresters, spark gap arresters, or hard tube arresters, are special components of electrical systems designed to protect electrical circuits from power surges and protect them from the destructive consequences of a short circuit. A GDT is essentially a long metal tube filled with a conductive gas mixture and a spark gap. This type of arrester functions in two ways: first, it acts as an electrical barrier to prevent or limit the flow of electricity between two points; second, it acts as a resistor to absorb any excess energy from the surge.

The metal tube, or outer conductor, of the GDT covers the cylindrical portion of the arrester and is usually made of copper or aluminum. The inner conducting material, which is usually a low electrical resistance material such as carbon, is placed inside the tube to provide the path for the electrical current to flow. The gas mixture typically used is nitrogen, sulfur hexafluoride, and trace amounts of noble gases. The spark gap helps ensure a controlled release of electricity-caused by a surge or fault current-by creating a spark and releasing a controlled amount of energy. This is how the GDT can protect the surrounding circuitry from dangerous levels of electricity.

The working principle of the GDT is based on the theory of cascading breakdown. When a voltage surge or fault current occurs, it initially causes the spark gap to fire and allow a relatively large amount of energy to be dissipated. As the surge progresses and the voltage level increases, more sparks are released until the tube has reached a voltage where the pressure inside the tube is equal to, or greater than, the breakdown voltage of the gas inside the tube. At this point, the gas within the tube breaks down, and this breakdown is cascaded along the length of the tube, releasing further energy. The end result is that the entire energy surge is fully dissipated.

Most GDTs are used in telecommunications systems and equipment, such as base stations, radio stations, and telephone exchanges. They are also widely used in power systems, including solar photovoltaic systems, wind turbine systems, and power distribution networks. They are a highly effective form of surge protection because they can protect against a wide range of surge and fault current levels. They also offer excellent protection from spikes and surge currents of up to 600 Volts.

Gas discharge tube arresters can be used in a variety of applications, such as high voltage transmission lines, power distribution systems, and telecommunications systems. They are also used in sensitive electronic circuits, such as computers, digital circuits, and instruments. To ensure optimal protection against voltage surges, it is important to choose the right type of GDT, as well as the right size and configuration.

In conclusion, the gas discharge tube arrester is an important component of any power or telecommunications system, providing reliable protection against damaging surges and currents. It works on the principle of cascading breakdown, where the gas within the tube breaks down when the voltage reaches a certain level, dissipating the energy of the surge. The GDT is suitable for a wide range of applications and it can offer excellent surge protection for sensitive electronic equipment.

The specific data is subject to PDF, and the above content is for reference