Motor assembly and circuit breaker comprising same

The invention discloses a motor assembly and a circuit breaker including the same. A motor assembly according to an embodiment of the present invention includes a bush member and a cover member formed of an insulating material. The bushing member and the cover member physically and electrically isolate the motor and the gear member. At this time, the gear member is formed of a steel material and maintains durability. Therefore, the insulation performance can be improved while the operation reliability and rigidity of the motor assembly are maintained. 本发明公开了马达组装体及包括其的断路器。本发明实施例的马达组装体包括由绝缘性材料形成的衬套构件和盖构件。衬套构件和盖构件使马达和齿轮构件物理且电气隔离。此时，齿轮构件由钢铁(steel)材料形成而保持耐久性。因此，能够在保持马达组装体的运转可靠性和刚性的同时提高绝缘性能。