SG600

Gas Discharge Tube Arresters (GDT): SG600 Application Field and Working Principle

Gas Discharge Tube (GDT) arresters are components with a wide range of applications, from protecting AC power systems to protecting communication lines. GDTs are used to provide surge protection, attenuating both transient voltage and current signals. They are a type of transient voltage suppressor (TVS) which can withstand high surge voltages, attenuate high frequency signals, and provide a low impedance path for transient currents. The SG600 Gas Discharge Tube Arrester is a type of GDT designed for use in a variety of protection applications. This article will discuss the SG600s application field and explain its working principle.

SG600 Application Field

The SG600 is specifically designed to protect AC power systems and communications lines from transient voltages. It is rated up to 600 volts making it suitable for applications with up to 480 Volt AC power systems, as well as communications lines with up to 48 Volt AC power systems. The SG600 is also resistant to high-energy pulses, which makes it perfect for protecting against lightning strikes and high-frequency signals. Additionally, the SG600 has a short response time and low follow current, meaning it can protect low-voltage electronics from high-energy pulses.

The SG600 can additionally be used as a peak current blocking device, protecting downstream equipment from overcurrent and short-circuit conditions. Furthermore, its low internal capacitance reduces the effect of inrush current, and its high discharge voltage range reduces energy losses. This makes it ideal for applications which require high protection levels with minimal energy losses.

SG600 Working Principle

The SG600’s working principle is based on the interaction of different gases within the arrester, including oxygen, helium, hydrogen, and nitrogen. When a voltage surge, caused by a lightning strike or high frequency signal, is applied across the SG600, its gas chamber is filled with ionized gas particles. These gas particles then interact with each other to form a low resistance path, which effectively reduces the surge voltage.

The SG600 also has a non-linear funct ion that suppresses over-voltage phenomena. When the surge voltage is applied, the gas chamber fills with ionized particles, which cause the electrical gap of the arrester to slowly increase. This increases the impedance of the arrester, reducing both the current and voltage flowing through it. Once the surge voltage has reached its peak, the electrical gap of the arrester begins to collapse, discharging the additional energy in the form of heat.

The SG600 can be used in multiple ways, depending on the type of protection needed. For example, the SG600 can be placed in parallel with an AC power system to protect against transient voltage surges. It can also be placed in series with a low voltage communications line to provide a low impedance path for transient signals. Additionally, the SG600 can be used as a peak current blocking device to protect downstream electronics from overcurrent and short-circuit conditions.

Conclusion

The SG600 Gas Discharge Tube arrester is a type of GDT designed for protection in a variety of applications, including AC power systems and communication lines. It offers high protection levels with minimal energy losses, and offers protection from transient voltage, current, and frequency signals. The SG600 has a short response time and a low follow-current to protect low voltage electronics, and its non-linear function suppresses over-voltage phenomena. These features make the SG600 a perfect choice for a wide range of protection applications.