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Gas Discharge Tube Arresters (GDT)

Gas Discharge Tube Arresters (GDTs), which date back to the early 1900s, are one of the most important devices used in electric power systems for protecting equipment and people from lightning and other high voltage transients. GDTs, also known as spark gaps or voltage-limiting arresters, are designed to limit the level of overvoltage that is applied to system components. This is achieved by rapidly conducting high levels of current, redirecting the energy from transients away from sensitive areas and components. Although they are used mainly in high-voltage applications, there is still a huge potential for increasing the performance of GDTs in lower-voltage applications, such as home and industrial systems.

2026-35A Application Field and Working Principle

The 2026-35A GDT Arresters is a multipurpose GDT arrester that is designed specifically for use in medium-voltage power transmission and distribution applications. It is capable of withstanding high-energy transient phenomena and features a low-frequency noise filter. The device consists of anodes and cathodes, which are arranged in a series circuit and connected to terminals in the housing. When a transient voltage occurs, the GDT is triggered, thus redirecting the incoming energy away from equipment and other sensitive components. The overall throughput of the GDT is greatly improved through the design of the high performance housing, which serves as an effective shield against high voltage transient voltages.

Typical Application Example

A typical application for the 2026-35A GDT Arrester is in the protection of long distance power lines. Such power lines are often exposed to lightning strikes and other high voltage events, which can cause severe damage. The 2026-35A GDT Arrester is well suited for this type of task, as it is designed to quickly dissipate the energy from such events. In addition, the filter in the housing ensures that the incoming energy is of a relatively low frequency and does not cause excessive stress to the power line itself.

Effectiveness of GDTs

GDTs are highly effective in protecting electrical components and systems from transient voltages. They are capable of limiting the potential damage that can be caused by these events, and in some instances, can even prevent the occurrence of harm. This is due to their very fast response time, and their ability to quickly dissipate the energy from transients. This makes them invaluable in protecting power systems from lightning strikes and other high voltage events.

Conclusion

Gas Discharge Tubes, such as the 2026-35A GDT Arrester, are a highly effective type of device for protecting power systems from high voltage transients. They are typically used in medium-voltage applications, but there is a growing trend of their use in low-voltage applications as well. Although they are relatively expensive, the protection that they offer is well worth their cost. As such, they are a trusted and reliable piece of equipment in any power system.

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