GTCN28-750M-P05

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Gas Discharge Tube Arresters (GDT) are overvoltage protection devices that are used when electrical systems are at risk of damage due to high voltage or lightning. The GTCN28-750M-P05 is a type of GDT that provides a low impedance grounding route for fast overvoltage transients. It has a wide voltage range of 18V to 1100V with an impulse rating of 10.5kV.

Application Field

Gas Discharge Tube Arresters (GDT) are used in a variety of situations and serve a range of purposes. They are mainly used to cushions surges and spikes that arise due to environmental factors such as lightning and electrostatic discharge. As a result, they are commonly used in electrical systems outdoors in areas where lightning strikes are common. GDTs are also used to prevent system damage due to overvoltages caused by induced transients from motors and transformers. In this case, they are usually employed in areas with a high density of power lines as well as for high voltage transmission systems.

Working Principle

Gas Discharge Tube Arresters (GDT) operate according to the principle of a vacuum tube. Basically, the GDT acts like an open switch when a discrepancy in the voltage arises. When the voltage level exceeds the GDT\'s threshold, an arc is created between its two electrodes which dissipates the excess electrical energy. This can also be thought of as a fast on-off switch that momentarily opens, allowing for a surge to be dissipated. The GTCN28-750M-P05 is no exception, and its main components are a gas filled tube that acts as the trigger of the GDT and an external spark gap which acts as a voltage limiter.

Once the voltage across the GDT rises above the specified threshold, the spark gap initiates a process known as "avalanche breakdown" in which electrons are accelerated to high energies, creating a conducting path. This path acts like a short circuit which diverts the surge to ground, thus protecting the system from harmful levels of voltage. The GTCN28-750M-P05 is designed to withstand a voltage of 1100V, meaning that its gas-filled tube will breakdown once the voltage rises above this level.

Once the spike in voltage is dissipated, the GDT will automatically shut off, reverting back to its original open switch state. The gas-filled tube will then act as an insulator, meaning that no current will flow through the GDT and the system will be protected from future surges.

Conclusion

In conclusion, GTCN28-750M-P05 is a type of Gas Discharge Tube Arrester (GDT) that is used in electrical systems to protect them from high voltages or lightning. It utilizes a gas-filled tube and an avalanche breakdown process to create a conducting path to ground which diverts the surge. Once the spike in voltage has been dissipated, the GDT will automatically shut off and the system will be protected from future surges.

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