A surge protector, also known as a lightning arrester, is an electronic device that provides safety protection for various electronic equipment, instruments, and communication lines. When the electrical circuit or communication line suddenly produces a peak current or voltage due to external interference, the surge protector can switch on the shunt in a very short time, so as to avoid the damage of the surge to other equipment in the circuit.
The surge protector is suitable for AC 50/60HZ, rated voltage 220V/380V power supply system, for indirect lightning and direct lightning impact or other instantaneous overvoltage surge protection, suitable for domestic residential, tertiary industry and industrial field surge protection requirements.
The most original surge protection device, the angular gap, appeared in the late 19th century, used for overhead transmission lines to prevent lightning strikes from damaging equipment insulation and causing power outages. In the 1920s, there were aluminum surge protectors, oxide film surge protectors and shot surge protectors. Tubular surge protectors were introduced in the 1930s. Silicon carbide lightning protectors appeared in the 1950s. Metal oxide surge protectors followed in the 1970s. Modern high-voltage surge protectors are used not only to limit the overvoltage caused by lightning in the power system, but also to limit the overvoltage caused by system operation.
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