A circuit breaker, in particular of a power breaker, having a busbar which is mounted so as to be movable between a closed position and an open position. The busbar, a trip device and a hand lever are coupled by means of the mechanism in such a way that, when the hand lever is moved from the first position into the second position, the busbar is moved from the open position into the closed position. Upon tripping of the trip device, the busbar is moved from the closed position into the open position, and the hand lever is moved from the second position into the first position if it is not blocked. When the hand lever is moved from the second position into the first position, the busbar is moved from the closed position into the open position regardless of whether the busbar is blocked in the closed position.

A switching operation mechanism to a molded case circuit breaker, including at least one operating handle, which is movable in a rotatable trajectory, said switching operation mechanism including at least one external rotary handle, at least one operation member and at least one movement transmission means, the said operation member being capable of moving in rotating trajectory in equivalent direction to the movement in rotating trajectory of the handle for operating the circuit breaker in molded case, arranged inside a housing including a laterally bipartite body, reaching an efficient movement transfer, requiring less mechanical effort of proportional operation of the user on the external rotary handle, wherein it is possible to maintain an external rotary handle, of great dimensions proportional to the assembled assembly, within the general perimeter of the molded case circuit breaker.

A multi-pole circuit breaker such as a residential electronic circuit breaker is provided. It includes a means to prevent a breaker mechanism from latching, i.e., a breaker armature from latching with a cradle if certain criterion is met. In particular, the multi-pole circuit breaker comprises a breaker mechanism including a breaker armature, a cradle and an armature latch bar to prevent the breaker armature from latching with the cradle. The armature latch bar includes a recessed feature that interfaces with the breaker armature, an armature latching surface that needs to be removed before the breaker mechanism can be latched and an armature latching lever that prevents a rotation of the breaker armature.

The present disclosure provides an entrance and exit position detection device for a power device. The entrance and exit position detection device for a power device comprises: a cradle which is open on one side and has an arrangement space formed therein; a power device body which may be in the arrangement space and has a guide plate formed on one side portion thereof; and a position detection part which linearly detects the displaced position of the power device body while the cradle enters and exits the arrangement space. Also, the present disclosure provides an entrance and exit monitoring system which has the above-described entrance and exit position detection device for the power device.

A circuit breaker is provided, which includes a cradle having a plurality of cradle terminals, and a breaker main body connected to the cradle and having a plurality of breaker terminals electrically connected to the plurality of cradle terminals, in which each of the plurality of breaker terminals includes a terminal body extended from the breaker main body and protruded toward each of the plurality of cradle terminals, contacts coupled to upper and lower portions of terminal body and disposed in parallel to face each other, and a contact protrusion protruded to a round shape in a direction which the contacts face each other such that, upon connection of the plurality of cradle terminals, the contact protrusion contacts and presses both sides of the connected cradle terminals.

An operating mechanism including a number of biasing elements and a number of linkage members is provided. The linkage members are operatively coupled to each other and each are movable between a second configuration, an initial tripped configuration, a rebound configuration, and a final tripped configuration. The biasing elements are operatively coupled to the number of linkage members and bias the number of linkage members to the final, first configuration. A stop member is coupled to one of the linkage members. The stop member moves with the associated linkage member. The stop member is positioned to contact a stop surface when the linkage members are in the rebound configuration. Contact between the stop member and the stop surface substantially arrests the motion of the linkage members.

A trip cam is for an operating handle assembly of an electrical switching apparatus. The electrical switching apparatus includes a housing and a number of poles. The operating handle assembly has an operating handle partially extending into the housing. The trip cam includes a mounting portion structured to be disposed in the housing, and an operating handle protrusion extending from the mounting portion and being structured to engage the operating handle.

The present disclosure relates to a power device monitoring system comprising: a cradle having a cradle terminal formed on the rear side thereof; a circuit breaker mechanically or electrically connected to or separated from the cradle terminal; at least one position detection means mounted inside the circuit breaker so as to detect the position of a circuit breaker body in real time; and a display unit for outputting the mobile characteristic of the circuit breaker body detected by the position detection means.

Circuit breakers with moving contacts having heel-toe action are configured to direct arcing across a small portion of a stationary contact surface to an adjacent arc chute to thereby alleviate deterioration due to arcing and improve conductivity of a major portion of the stationary contact and moving contact surface over time.

Disclosed is a gap adjusting method which easily adjusts a gap between a bimetal and a crossbar by using a gap adjusting block and an adjusting screw in a trip mechanism of a molded case circuit breaker without a separate additional device. The gap adjusting method in the trip mechanism of the molded case circuit breaker includes setting a reference gap between a crossbar and a bimetal, measuring a total resistance of the trip mechanism and a trip stroke of a switching mechanism to set a compensation gap, placing a gap adjusting block on a position separated from a crossbar by a gap based on the sum of the reference gap and the compensation gap, rotating an adjusting screw assembled with the bimetal to contact the adjusting screw with the gap adjusting block, and adhering the adjusting screw to the bimetal.