The function of surge protector

Lightning discharges can occur between or within clouds, or between clouds and the ground. Furthermore, the internal surges generated by the use of many high-capacity electrical devices have become a focus of attention due to their impact on power supply systems (Chinese low-voltage power supply system standard: AC 50Hz 220/380V) and electrical equipment, as well as lightning and surge protection.

Cloud-to-ground lightning discharges consist of one or more individual lightning strikes, each carrying several high-amplitude, short-duration currents. A typical lightning discharge will include two or three lightning strikes, each separated by approximately one-twentieth of a second. Most lightning currents fall between 10,000 and 100,000 amperes, with a duration generally less than 100 microseconds.

Within power supply systems, the use of high-capacity equipment and frequency converters has led to increasingly serious internal surge problems. We attribute this to the effects of transient overvoltages (TVS). Every electrical device has a permissible range for its power supply voltage. Sometimes even a narrow overvoltage surge can damage the power supply or the entire device. This is the destructive effect of transient overvoltages (TVS). Especially for some sensitive microelectronic devices, sometimes a small surge can cause fatal damage.