Abstract: The present invention relates to an interrupter for a circuit breaker for a transmission or distribution line which can distribute and weaken an arc resulting from separation of contacts, can reduce loss of the contacts by the arc, and can improve interruption performance, when an abnormal current such as overcurrent is generated. A plurality of horizontal loops of conductive path are formed on a fixed electrode and a movable electrode, thereby forming a plurality of vertical magnetic fields in parallel with a generation direction of the arc. When the arc is generated between a fixed contactor and a movable contactor respectively connected to the fixed electrode and the movable electrode, the arc can be evenly distributed on the fixed and movable contactors. At the same time, a movement of the arc can be interrupted.

Abstract: A trip link structure for a circuit breaker is disclosed and includes a plurality of circuit breakers arranged in a triangle shape and each having a fixed contact point and a movable contact point formed therein for thereby forming one unit including three circuit breakers as one unit with respect to three phases and an operational rod connected with the movable contact point, a main body engaging plate engaged to a front surface of the circuit breaker of each phase, a support bracket engaged to a front surface of each phase of the main body engaging plate, an operational link plate having a first connection portion hinged to the operational rod and a second connection portion supported by the first connection portion of a support bracket, a connection link having an upper end hinged to a third connection portion of the operational link plate connected with the circuit breaker of the upper side for thereby being downwardly extended and a lower end hinged to the third connection portion of the operational link

Abstract: A terminal connection locking apparatus for a vacuum circuit breaker a trapping latch movably engaged to a driving cam, a crossbar connected to a lower portion of the trapping latch, change levers connected to a central lower surface portion and each side lower surface portion of the crossbar, springs elastically connected to the side change levers, a control lever disposed to a side portion of the contact control screw and externally exposed from the vacuum circuit breaker, a restoring link extended inwardly from the control lever, an interlock lever downwardly connected to an inner end portion of the restoring link, a spring elastically connected to the interlock lever, an engagement link connected to a side portion of control lever and horizontally spaced from the central change lever coupled to the crossbar, and a shielding plate for being rotatably connected to an end portion of the engagement link and covering/discovering the contact control screw.