An automatic opening mechanism that includes a turntable and a first energy turntable to rotate from an energy storage spring, a reset mechanism that includes a reset gear, and a tripping mechanism that includes a tripping unit. The first energy storage spring releases energy and drives the turntable to rotate from an energy storage position to an every release position; meanwhile, the operating shaft is driven to rotate from a closing position to an opening position. The operating shaft rotates from the opening position to the closing position and drives the turntable to rotate from the energy release position to the energy storage position so as to drive the first energy storage spring to store energy, and the turntable is engaged with the reset gear to drive the turntable to rate, and the reset gear drives the tripping unit to reset.

An opening switch and a remote circuit breaker are provided. The opening switch includes a base, and an energy storage assembly and a lock catch assembly that are disposed on the base; the energy storage assembly is disposed on an inner wall of the base, one end of the lock catch assembly is hinged to the base, a lock catch protrusion is disposed on the lock catch assembly, and the lock catch protrusion includes a barrier wall; and when the barrier wall is configured to abut against an energy storage arm of the energy storage assembly, under an action force of the energy storage arm, the lock catch assembly has a rotation tendency, so that the energy storage assembly maintains an energy storage state.