SL1021A420RS

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Gas Discharge Tube Arresters (GDT) are an important category of electrical protection components which are used to protect electric equipment from lightning and electrical surge overvoltage. The common components of GDT, also known as spark gap arrester, include the SL1021A420RS. This arrester features high voltage and current capability, long life and high insulation resistance. Its main application is in the protection of power system electric equipment, especially in areas with frequent lightning or switching overvoltage.

Introduction

A GDT, also known as a spark gap arrester, is an surge protective device which is designed to protect electric lines and equipment from the effects of voltage spikes caused by lightning and high-frequency switching of power. GDTs are made of two electrodes, usually made of metal, which are insulated from each other by a dielectric medium, which is usually a mix of gas and oil. When a high voltage is applied to the electrodes, the dielectric medium between them ionizes, producing a spark, which is then dissipated into the atmosphere and the current is stopped. The SL1021A420RS is a typical GDT used in the power system electricity industry.

Working Principle

The SL1021A420RS GDT consists of two metal electrodes, commonly made of molybdenum and an aluminum oxide dielectric between them. When a voltage surge occurs, the dielectric between the electrodes is ionized, causing an arc to form between the electrodes. This arc channel terminates the surge current, reducing the voltage to safe levels and dissipating it into the atmosphere. In addition to this, the resistor element inside the device will also act as an overload limiter, preventing further surges from entering the system.

Features and Advantages

The SL1021A420RS GDT features a high voltage and current capability of up to 4.2kV and 420A, respectively, as well as a long life and a high insulation resistance. Its long life means that it can withstand multiple and frequent voltage surges, providing consistent protection over its lifetime. Additionally, its high insulation resistance, up to 500MΩ, means that it won’t fail due to minor current leakage due to ageing or other environmental factors. The temperature rating for the SL1021A420RS is -40 to 85°C, making it suitable for a wide range of applications.

Application Fields

The SL1021A420RS GDT is primarily used to protect power systems from lightning and switching surge related overvoltages. It is particularly useful in areas with a high frequency of lightning, such as coastal regions, or those that are prone to frequent switching operations, which can also create surge related overvoltages. Additionally, the SL1021A420RS GDT is also suitable for industrial applications such as power supply systems, photovoltaic and data communication transmission, thereby providing comprehensive protection for electronic and power equipment.

Conclusion

The SL1021A420RS GDT is a highly reliable surge protection device which is well suited to protecting various electrical systems from lightning and switching surge related overvoltages. It is easy to install and maintain, and has a long lifespan. Additionally, its high voltage and current capability, as well as its high insulation resistance, makes it an ideal choice for areas with frequent lightning or power switching operations. Overall, the SL1021A420RS GDT is an excellent choice for protecting power systems against lightning and other surge related overvoltages.

The specific data is subject to PDF, and the above content is for reference