| 摘要 |
Provided is a molded case circuit breaker including a front space, a rear space divided from the front space, a fixed contact unit provided on one side of the front space and in electric contact with one of a power supply and a load, a movable contact unit installed in the front space to be movable and in contact with the fixed contact unit, a switching device installed in the rear space and operating to allow the movable contact unit to be in selective contact with the fixed contact unit, an operation device installed in the front space and the rear space and transferring the movable contact unit according to operation of the switching device, an arc extinguishment chamber installed on the one side of the front space and extinguishing an arc induced while the fixed contact unit is being separated from the movable contact unit, and a barrier preventing backward movement of the arc from at least one position of a moving way of the movable contact unit, the position separate from the fixed contact unit. |
