2026-07-CB

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Gas Discharge Tube Arresters (GDT) are commonly used overvoltage protectors. In particular, they are used to protect electrical and electronic circuits from lightning discharges and other overvoltage surges. GDTs are designed to temporarily conduct only when a predetermined voltage is exceeded and can be used in a variety of applications, from industrial to residential systems. In this article, we will discuss the application field and working principle of 2026-07-CB GDTs.

Overview of GDTs

GDTs, also known as spark-gaps, are nonlinear devices that protect electrical circuits from the high energy pulses caused by external lightning transient overvoltage or switchgear operation. GDTs are composed of two electrodes contained within a glass or ceramic tube. When an overvoltage passes through a GDT, a spark occurs, leading to a current surge that can cause damage to the equipment or system. To protect against this, the GDT limits the current to a manageable level, dissipating the excess voltage as heat.

Application Field of 2026-07-CB GDTs

2026-07-CB GDTs are designed for both indoor and outdoor applications. They are suitable for lightning protection of electrical and electronic circuits in residential, commercial, industrial or military settings. The 2026-07-CB GDTs are constructed with a robust dielectric strength rating and a wide temperature range, making them suitable for harsh environments. They have been designed to operate in-line with either AC or DC power, and can be used with a variety of power systems.

The 2026-07-CB GDTs have a high surge threshold voltage rating that enables them to protect equipment from a wide range of transient overvoltage and surge events. In addition, they are designed with a resistivity rating that allows them to make reliable contacts between the electrodes even after multiple surges occur. This feature makes them especially suitable for applications that require the protection of delicate circuits or components.

Working Principle of 2026-07-CB GDTs

The 2026-07-CB GDTs use a basic principle which states that high energy pulses, such as those caused by lightning transients and overvoltage surges, should be diverted away from sensitive equipment and components. The GDTs are designed with metal electrodes which form a gap when the surge current reaches a certain level. When this happens, the spark gap conducts the current, diverting it from the protected load. The gap then quickly re-establishes its isolation, preventing further current flow and allowing the surge to be dissipated safely.

The 2026-07-CB GDTs have a threshold voltage rating which determines the level at which the spark gap will form. This voltage is generally equal to or higher than the highest voltage expected from a surge or transient. The spark gap is designed to resistively conduct once this voltage is exceeded. The energy diverted by the spark gap is dissipated in the form of heat, thus protecting the circuit and reducing the severity of the transient surge.

Conclusion

2026-07-CB GDTs are well-suited for a variety of uses, including residential, commercial, industrial and military applications. They are designed with a robust dielectric strength rating and a wide temperature range, making them suitable for harsh environments. In addition, the 2026-07-CB GDTs are designed with a resistor rating and a threshold voltage rating that allows them to make reliable contacts between the electrodes and protect the equipment from transients and surges.

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