TRIPPING MECHANISM PROTECTING FROM RESIDUAL CURRENT AND TRIPPER

摘要

A tripping mechanism protecting from residual current and a tripper (100). The tripping mechanism (102) comprises a tripping bar (20) and a hammer (30). The hammer is engaged with the tripping bar so that the hammer is movable between a normal operating position and a tripping position. The tripping bar has a first engaging portion (23) and a second engaging portion (22A-22C). The first engaging portion interacts with a bar protecting from residual current (40) of a device protecting from residual current so as to operate the tripping bar to activate the hammer to trip. The second engaging portion interacts with at least one of a device protecting from overload and a device protecting from short-circuit so as to operate the tripping bar to activate the hammer to trip. The tripping mechanism is shared by the device protecting from residual current, the device protecting from overload and the device protecting from short-circuit. Therefore, the structures are simplified, and the cost is saved.