CIRCUIT BREAKER

摘要

Provided is a circuit breaker that can form a trip display with a simple structure and prevent erroneous display. This circuit breaker is provided with: a device body (10) in which a window hole (11o) is formed; a contact point mechanism (13); a handle (140) that rotates between a closed contact position and an open contact position; a link mechanism (14); a magnetic release means (150) and a thermomotive release means (151) that forcibly open the contact point mechanism (13); a handle spring (147) that impels the handle (140) toward the open contact position; a display member (16) that is supported freely rotatably by the device body (10) and has display parts (16A - 16C); and a latch spring (145) one end of which presses against the display member (16) and impels the display member (16) toward the trip position side where a trip display part (16A) faces the window hole (11o). A latching protrusion (16c) that mates with a latching piece (147e) of the handle spring (147) and regulates the rotation toward the trip position side is formed for the display part (16).