2026-07-C13

Gas Discharge Tube Arresters (GDT) are electrical components used to protect circuitry from overvoltage and high voltage spikes in electrical current, such as lightning. GDTs are also known as spark gap arresters, surge arresters, spark gaps, and electric gap arresters. They are typically placed on lines conducted into and out of an electrical system.

A GDT works by creating a spark gap that interrupts the electrical current flow whenever the voltage rises above a certain limit. The spark gap\'s size is adjustable, allowing it to be used in a variety of applications. The gap also serves to dissipate the energy of the incoming voltage spike, preventing the electrical system from being damaged.

GDTs have been in use since the 19th century and can be found in almost any type of electrical system today. They are used to protect industrial systems from high voltage surges and spikes, as well as residential systems from lightning strikes and power outages. They are also used in the automotive industry to protect electrical systems from overvoltage and other electrical disturbances.

A GDT typically consists of three parts: a cathode, an anode, and a gap between them. The cathode and anode are usually made of graphite or metal, and the gap may be adjustable or fixed. When an overvoltage event occurs, the gap ionizes – meaning that the electrons in the air are drawn to the anode and cathode, producing a spark. This spark dissipates the energy of the incoming voltage surge, safely bringing the current back to normal levels.

GDTs are an effective protection against overvoltage, and can be used in a variety of applications. They can be used on power lines in industries where high voltage surges may occur, or in residential homes and businesses to protect against power outages and lightning strikes. Additionally, they can be used in automotive applications to protect electrical systems from overvoltage.

Gas Discharge Tube Arresters (GDT) are a reliable and cost-effective way to protect against high voltage spikes and overvoltage events. While the spark gap of a GDT can be adjusted, it is important to make sure that the gap size is appropriate for the application and that the GDT is installed correctly in order to ensure optimal performance. Overall, GDTs are an important part of any electrical system and can help to safeguard against damage caused by overvoltage.