SL1021B200RF

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Gas Discharge Tube Arresters (GDT) are a type of surge protection device used to protect sensitive electronic equipment and components from high-voltage electrical surges and spikes. The SL1021B200RF is a type of GDT developed by Siemens which provides reliable protection from overvoltage events in a wide range of applications. This article will discuss the application field and working principle of the SL1021B200RF.

The SL1021B200RF is a three-stage GDT with a high surge capacity of 8 kA for electrical installations in medium voltage applications. It is designed to protect sensitive devices such as sensitive electronic equipment, communication and control circuits and motors, from overvoltage events such as lightning, power supply system faults and short-circuits. The effective protection of critical components in these applications can extend the lifetime of the equipment, reduce maintenance costs and improve system reliability.

The SL1021B200RF has a three-stage design that ensures the fast and reliable response to overvoltage events. The first stage is a low voltage bypass switch that rapidly routes excessive voltage away from the protected components, reducing the time to clearing any fault current. The second stage is an arc gap that breaks down at the rated maximum voltage, safely dissipating a large percentage of the overvoltage energy. The third stage is a gas discharge tube that absorbs the remaining overvoltage and provides additional protection from transient surges and spikes.

The SL1021B200RF is constructed using a combination of proven technologies to ensure that it can protect a wide range of applications from overvoltage events. The device is UL recognized, providing an additional layer of safety and reliability. It is also available in a range of sizes and ratings to provide the required protection for specific applications. The device has a low front-of-wave surge rating of 2kV, while the maximum continuous operating voltage is 5kV.

The SL1021B200RF is suitable for a wide range of applications, including industrial and domestic electrical systems, residential and commercial lighting systems, telecommunications systems, and radio systems. It is also suitable for renewable energy applications such as photovoltaic and wind energy systems.

The working principle of the SL1021B200RF is based on the principle of a voltage-selective spark gap, which is a type of variable-length spark gap, consisting of an electrodynamic mechanism with an adjustable electrode distance. This mechanism is used to manage the voltage rating and spark gap length at different operating points to ensure that the device is able to protect the intended components from overvoltages.

The SL1021B200RF also uses a gas discharge tube to absorb any remaining overvoltage energy. This device is located next to the spark gap and its electrode is in direct contact with the varistors. When an overvoltage event occurs, the spark gap breaks down and the energy is then discharged into the gas discharge tube. The gas discharge tube acts as a resistor, dissipating the overvoltage energy, while the remaining voltage is dissipated by the varistors.

In summary, the SL1021B200RF is a type of GDT developed by Siemens which provides reliable protection from overvoltage events in a wide range of applications. It has a three-stage design, consisting of a bypass switch, an arc gap and a gas discharge tube, which is used to manage the voltage rating and spark gap length at different operating points. The device is UL recognized and available in different sizes and ratings, making it suitable for many different applications.

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