ST-0800-BLB-STD

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Gas Discharge Tube (GDT) Arresters are designed to protect electrical equipment against overvoltage surges caused by lightning and other sources. They are available in a variety of packaging and ratings to suit different scenarios. The ST-0800-BLB-STD is a GDT arrester designed for low-frequency communications applications with a standard rating of 900 volts. This arrester is cylindrical in shape and is designed to be mounted to a bracket or an insulator.

In order to understand the way a GDT works, it is necessary to understand the physical phenomenon of dielectric strength. Dielectric strength is a measure of the ability of a material or device to withstand an electric field when an electric potential is applied between two electrodes. GDTs use dielectric strength to limit the peak voltage and current of any overvoltage surge. This is done by utilizing a gas-filled cylindrical tube with a positive thermal coefficient of electrical resistivity, which means the resistivity of the arrester increases with an increase in temperature.

The ST-0800-BLB-STD arrester utilizes this principle by employing a gas-filled tube surrounded by layers of solid dielectric material. When an overvoltage surge occurs, the electrons in the gas molecules are ionized, creating an electric current arc between the electrodes which causes the temperature of the gas to heat up. This increased temperature increases the resistivity of the gas, causing the electric field strength to weaken, thus reducing the current and voltage of the surge.

Once the surge is over, the gas cools down and the resistivity of the tube decreases. This decreases the electric field strength, allowing the current and voltage of the next surge to be lower than before. This way, the arrester continuously absorbs and dissipates any high-powered overvoltage surges that can potentially damage the attached equipment.

The ST-0800-BLB-STD arrester is manufactured with high quality materials and is rated for a standard of 900 volts. This arrester has an operating temperature range of -40°C to +85°C and can withstand surges up to 7.2 Joules. It is also designed to provide transient overvoltage protection for telephone and other communication applications.

In summary, the ST-0800-BLB-STD arrester is a high-quality, low-frequency communication grade GDT designed to protect electrical equipment from overvoltage surges caused by lightning and other sources. It uses dielectric strength and a gas-filled tube with a positive thermal coefficient of electrical resistivity to absorb and dissipate the high-powered surges that could otherwise damage the equipment. It is rated for 900 volts and a surge energy up to 7.2 Joules and is designed to provide transient overvoltage protection for telephone and other communication applications.

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