| 摘要 |
A thermomagnetic protection device applicable to a multi-pole breaker. The thermomagnetic protection device comprises: a housing, a multi-pole protection unit (105), an energy-storing component (106) and an adjustment component (107). The housing comprises an upper housing (111) and a base (112). The multi-pole protection unit is installed inside the housing, and comprises a plurality of thermomagnetic protection devices. Each thermomagnetic protection device corresponds to one pole of the multi-pole breaker. Each thermomagnetic protection device comprises a thermal protection component (102) and a magnetic protection component (103). The multi-pole protection unit comprises a rod (501), and the rod adjusts an air gap of the magnetic protection component. The energy-storing component is disposed inside the housing, and engages with the thermal protection component. When an overload current occurs in the energy-storing component, the thermal protection component triggers and strikes an operation mechanism of the breaker. The adjustment component is installed on the housing, and engages with the rod and the energy-storing component. The adjusting component adjusts the overload current by means of adjusting the distance between the energy-storing component and the thermal protection component, thus regulating transient current by means of adjusting the rod. |
