CURRENT LIMITER ELEMENT AND CIRCUIT BREAKER

PURPOSE: To provide a current limiter element and a wiring circuit breaker with a low wear in a contact and capable of preventing abnormal temp. increase while surely re-energizing with a low loss. CONSTITUTION: A least contact parts 10, 40 of a contact pair 30, 60 generating arcs upon current limiting operation are arranged in a cylindrical insulating part 70, and the pair 30, 60 and a resistor 80 are connected in parallel with each other electrically, and the pair is brought into contact with a proper contact pressure by a spring 90 or the like at the time of normal energization. The pair 30, 60 is provided with a movable element having a substantially rod-like conductor part at which one end a movable cotact is fixed and a fixed contact having a substantially rod-like conductor part at which one end a fixed contact capable of being separated, and the rod-like conductor part in the vicinity of contact is made hollow. On a side surface of the rod-like conductor part in the vicinity of the contact a spiral groove by which the direction of rotation is made opposite on the side of moving element and on the side of fixed element is formed.