The invention discloses a two-stage series gap
lightning flashover protector capable of being replaced in an electrified mode. A high-
voltage wire is connected to a wire clamp seat in a led mode, the
lightning flashover protector cannot be affected by
power frequency voltage or switching
overvoltage at ordinary times through the air gap between a drainage rod and a
discharge electrode, and therefore the service life of the
lightning flashover protector is prolonged. When
lightning overvoltage exists and can break through two series gaps at the same time, the
effective action of the lightning flashover protector is guaranteed, the
discharge path of arcs is controlled, the amplitude of the
lightning overvoltage is limited, and an
insulator flashover accident is avoided. Due to the fact that the whole lightning flashover protector is structurally divided into a high-
voltage part and an operable part, and the high-voltage part and the operable part are isolated through a core rod, it is guaranteed that when a 10kV
overhead line is operated normally and an operator detaches the lightning flashover protector, the operator cannot touch the high-voltage wire. The lightning flashover protector can be conveniently taken down and installed under the
power grid electrified condition only through a tool line connector rod commonly used in an electric
system.