2027-25-B10

Series:	2027
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Voltage - DC Spark Over (Nom):	250V
Impulse Discharge Current (8/20µs):	10000A (10kA)
Tolerance:	±15%
Number of Poles:	2
Fail Short:	No
Mounting Type:	Through Hole
Package / Case:	Axial Cylinder, Radial Bend

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Gas Discharge Tube Arresters (GDT)

Gas Discharge Tube (GDT) arresters are a type of transmission line protection device that utilizes the electrical breakdown of a gas to protect the equipment from surges. They are often used for overhead power line protection in order to limit the damage caused by lightning or other transient overvoltages.GDT arresters are composed of a gas-filled cylindrical tube connected between two points of a transmission line. The gas is usually nitrogen or sulfur hexafluoride, filled at a pressure slightly higher than atmospheric pressure. As the voltage across the arrester increases, a spark begins to arc across the gap between the electrodes. This spark serves to interrupt any high voltage surges flowing between the two points, limiting the transmission line damage.When the surge voltage on the arrester exceeds the breakdown voltage of the gas, the spark jumps from one electrode to the other and causes a rapid dielectric breakdown, allowing a high current to flow through the arrester and discharge the energy from the transmission line. The rapid breakdown of the gas in the arrester is followed by a rapid re-establishment of the arc, so the arrester continues to run in its primary role of protecting the line against surges.By controlling the gap between the electrodes, the arrester can be designed to remain below its breakdown voltage for nominal rated line condition and to break down at higher levels for transient surges. This makes the arrester an effective device for protection against lightning strikes and other transient overvoltages.Depending on the application, GDT arresters are classified as either steady state or transient type GDT arresters. Steady state GDTs are designed to provide protection for normal power system operation, whereas transient types are designed to provide protection during transients.In addition to reliable protection against high voltage transients, GDT arresters are used for a variety of other applications. GDT arresters can be used for ground fault protection, frequency control, remote telemetry, and for preventive maintenance of networks.GDT arresters have become one of the most widely used transmission line protection devices due to their excellent surge protection capabilities, reliability, compact size, and relatively low cost. GDTs are often preferred for applications where the arrester must operate in high temperatures and humidity environments as they have high dielectric and thermal breakdown strength.They are also very effective in preventing static buildup on the line and protecting personnel from dangerous energy levels. And with the increasing adoption of computerized control systems, GDTs are becoming increasingly common in power line protection applications.Overall, GDT arresters are versatile, reliable, and cost-effective solutions for providing protection against lightning strikes and transient overvoltages. With their high surge capability, reliability, and versatility, GDTs are becoming more and more popular all over the world.

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