SG420 Circuit Protection

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Inrush Current Limiters (ICL) are passive devices used to help reduce peak inrush currents in electrical and electronic circuits. They use inductors or capacitors in series to reduce the amount of current that can flow during these short-duration, high-amperage events. The SG420 is a type of ICL that is designed for AC applications. It has a high breakdown voltage and low leakage current. It is suitable for high inrush current protection and reliable start-up of a wide range of AC equipment, including general and special purpose motors, transformers, HID lighting, and other inductive devices.

The SG420 works by utilizing a high-voltage vacuum capacitance element. When energized, the capacitance creates a strong electromagnetic field, which delays the current flow. This delay allows the start-up current to gradually increase over time, allowing the device to start up safely without damaging itself or the equipment. The capacitance element also prevents the current from getting too high during the inrush current event, dramatically reducing the peak current. After the inrush current is reduced, the capacitance element rapidly discharges, allowing the system to operate normally.

The SG420 features a range of adjustable settings to suit different inrush current requirements. It is equipped with two adjustable current ranges, allowing users to customize the inrush current level according to their specific application needs. Additionally, the SG420 also includes protection features such as an over-voltage alarm and current monitor, which helps to protect the device from damaging overloads. Furthermore, the SG420 has a compact design and can be easily installed in a variety of applications.

The SG420 is an ideal solution for protecting AC equipment from potential inrush current problems. It is designed to reduce the peak current to a safe range, providing a reliable start-up without overheating, noise or damage to the connected equipment. Additionally, the adjustable current ranges, protective features, and compact design give users the ability to customize the device to meet their specific inrush current protection requirements.

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