Tripping device and overvoltage and overcurrent protection device

The utility model discloses a tripping device and an overvoltage and overcurrent protection device. The tripping device comprises a first electrode, a tripping assembly, a first overvoltage and overcurrent protection unit, a fuse and a second electrode, a series loop formed by connecting the tripping assembly and the first overvoltage and overcurrent protection unit in series is connected between the first electrode and the second electrode; the fuse is connected in parallel with two ends of the tripping assembly. According to the utility model, the arc discharge phenomenon when the protection function of the tripping device is started can be avoided. 本实用新型公开了一种脱扣装置和过压过流保护器件，所述脱扣装置包括：第一电极、脱扣组件、第一过压过流保护单元、保险丝和第二电极；所述脱扣组件和所述第一过压过流保护单元串联成的串联回路连接于所述第一电极与所述第二电极之间；所述保险丝并联于所述脱扣组件两端。本实用新型能够避免脱扣装置保护功能启动时的拉弧现象。