2029-23-SMLF

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 (GDT) are devices specifically designed to divert and limit the illegal flow of current that often accompanies transients and power system switching operations. These arresters are the first stage of protection in a protection system, they are used to protect the power system equipment from a variety of transient types. GDT’s, when correctly applied to a power system, will limit voltage levels at terminals of sensitive equipment, such as motors, transformers, generators, and other electrical systems.

The working principle of GDT Arresters is that they are a form of surge protection device designed to provide over-voltage protection against a variety of transient or power system switching operations. The GDT arresters are designed to provide a low voltage capacitive resistance that provides for fast over-voltage protection. The GDT arrester operates based on a spark gap discharge principle. As the voltage increases, the spark gap increases resulting in a high current capacity that can be monitored and measured by a meter or system control system.

In a GDT arrester, current passes from a power source to the ground through a spark gap. The spark gap is composed of two electrodes with a gap between them. When the voltage applied to the spark gap exceeds its breakdown voltage, a spark gap discharge occurs. This discharge serves to limit the voltage to the appropriate level, preventing over-voltage damage. Additionally, the spark gap also provides a barrier to limit the passage of current.

GDT Arresters are used to protect electrical equipment from over-voltage transients or power system switching operations. This type of arrester consists of several components, including a spark gap, a sensing resistor, a protection resistor, a capacitor, and a thermistor. The spark gap is the most important component of the device, providing the over-voltage protection, and it is the device in direct contact with the source of power. The sensing resistor is responsible for detecting when the inter-arrestor voltage has been exceeded. The protection resistor reduces the amount of high voltage that passes through the spark gap.

The capacitor and thermistor components of a GDT arrester provide additional protection. The capacitor is connected in parallel to the spark gap, and it serves to reduce the amplitude of transient current that may reach the terminals of a protected device. The thermistor provides temperature compensation, thus reducing the effect of temperature on the parameters of the arrester.

GDT Arresters are typically used in power systems to protect both the power system and its installed equipment from the damage caused by lightning strikes and other power disturbances. These arresters are also used to protect against direct lightning strikes. GDT arresters provide enhanced protection for expensive power system components in power systems with vulnerable points. GDT arresters are often used for the protection of transformers, circuit breakers, computers, motors, and other electric equipment.

GDT Arresters provide protection from a variety of over-voltage and power disturbances, such as lightning, power surges, direct lightning strikes, and power system switching operations. When correctly designed and sized, GDT arresters provide efficient protection to power equipment, while reducing the likelihood of damaging electrical system failures. For reliable and cost effective protection, GDT arresters are a technological advancement that should be taken into consideration for any application.

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