High-weldability controllable multi-layer gap overvoltage protector based on copper-chromium alloy

The invention discloses a high-weldability controllable multi-layer gap overvoltage protector based on copper-chromium alloy, and the overvoltage protector consists of a fixed multi-layer gap, a controllable multi-layer gap, and an intelligent controllable switch. According to the overvoltage protection gap of the engineering multi-layer structure, which is manufactured by using the high and good electric conduction and heat conduction performance, high hardness, wear resistance, explosion resistance, machinability and weldability of the copper-chromium alloy, the automatic overvoltage coupling trigger circuit of the intelligent controllable switch can automatically couple overvoltage energy to output a trigger pulse; and the three-electrode discharge switch of the intelligent controllable switch is switched on, so that the controllable part of the multi-layer gap is short-circuited, and the overvoltage gap of the multi-layer structure has the remarkable characteristics of high alternating-current and direct-