PMT3(310)23006F Circuit Protection

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Gas Discharge Tube Arresters (GDT)

Gas Discharge Tube Arresters (GDT) is one of the most important electrical protection devices used in power systems. It can effectively limit the voltage surge caused by lightning strikes, making it an integral part of power systems today. In this article, we will discuss the PMT3 (310)23006F application field and working principle.

Application Field

The PMT3 (310)23006F is a three-phase gas discharge tube arrestor suitable for direct connection to power lines with up to three phases. It is suitable for use on systems where the highest phase-to-phase voltage is 310 volts and can be used with line, phase and ground leads. This arrestor is designed to protect electrical systems from overvoltage caused by lightning strikes. The 330kV impulse sparkover voltage provides reliable protection with a response time of up to 25 microseconds.

Working Principle

The working principle of a GDT is based on the principle of spark gap. It uses a gas-filled tube with two electrodes that create a spark gap when the voltage across the electrodes reaches a certain level. When the voltage reaches the certain level, the gas in the tube ionises, forming a conductive path between the two electrodes, which then limits the voltage by providing an alternative current path for the energy surge.

The PMT3 (310)23006F GDT arrestor is designed to respond quickly to overvoltage conditions. It has a sparkover voltage of 330kV and withstands up to 1500A of current. The arrestor is designed to trip within 25 microseconds, limiting the amount of damage caused by lightning strikes. After the voltage spike is contained, the arrestor will remain in a blocking state until the voltage normalises.

Conclusion

The PMT3 (310)23006F Gas Discharge Tube Arrestor is a three-phase arrestor suitable for direct connection to power lines with up to three phases. It is designed to provide reliable protection from lightning strikes, with a sparkover voltage of 330kV and a response time of up to 25 microseconds. This arrestor can limit the amount of damage caused by lightning strikes and keep your power system running safely and reliably.

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