Abstract: A circuit breaker having a monolithic structure and method of making is disclosed. The monolithic structure includes an arm portion having copper and a contact portion having a composite material. The composite material has a metallic matrix and a second phase disposed in the metallic matrix. The method of making the monolithic structure includes introducing a first powder into a first region of a mold, introducing a second powder into a second region of the mold, and consolidating the first powder and the second powder together. The first region of the mold corresponds to a contact portion, and the second region corresponds to an arm portion of the monolithic structure of the circuit breaker.

Abstract: A contact system of a circuit breaker includes a fixed contact. The contact system also includes a moveable contact arm assembly comprising at least one moveable contact arm having a moveable contact thereon, the moveable contact arm moveable to define a closed condition and a blow open condition. The contact system further includes a carrier assembly operatively coupled to the moveable contact arm. The contact system yet further includes a latch plate operatively coupled to the carrier assembly. The contact system also includes a trip shaft operatively coupled to the carrier assembly, the trip shaft having a non-circular region defining an engagement surface disposed in contact with the latch plate in the closed condition. The contact system further includes a biasing portion of the moveable contact arm configured to rotate the trip shaft out of engagement with the latch plate and into the blow open condition.

Abstract: A conductor guide member for a circuit breaker terminal assembly includes a body having at least one conductor guide surface configured and disposed to facilitate alignment between at least one terminal connection member of the terminal assembly and at least one conductor. The at least one conductor guide surface gradually slopes from a first end to a second end. The second end defines a recess.

Abstract: A contact system of a circuit breaker includes a fixed contact. The contact system also includes a moveable contact arm assembly comprising at least one moveable contact arm having a moveable contact thereon, the moveable contact arm moveable to define a closed condition and a blow open condition. The contact system further includes a carrier assembly operatively coupled to the moveable contact arm. The contact system yet further includes a latch plate operatively coupled to the carrier assembly. The contact system also includes a trip shaft operatively coupled to the carrier assembly, the trip shaft having a non-circular region defining an engagement surface disposed in contact with the latch plate in the closed condition. The contact system further includes a biasing portion of the moveable contact arm configured to rotate the trip shaft out of engagement with the latch plate and into the blow open condition.

Abstract: A cover assembly for a circuit breaker includes a cover, the cover including a first portion and a second portion. The first portion is configured to at least partially cover a current sensing element within the circuit breaker, and has an interior surface and a cover opening. The second portion extends from the interior surface of the first portion, and has a terminal pocket opening aligned with the cover opening. The cover is configured to receive a load terminal through the terminal pocket opening and cover opening.

Abstract: In one embodiment, a shutter lock assembly for a circuit breaker cassette having a shutter coupled to a shutter rod is provided. The shutter lock assembly includes a lock plate assembly configured to couple to the circuit breaker cassette and an actuation mechanism having a first end coupled the lock plate assembly. The actuation mechanism is configured to actuate the lock plate assembly to lock the shutter of the circuit breaker cassette in a closed position.

Abstract: A conductor guide member for a circuit breaker terminal assembly includes a body having at least one conductor guide surface configured and disposed to facilitate alignment between at least one terminal connection member of the terminal assembly and at least one conductor. The at least one conductor guide surface gradually slopes from a first end to a second end. The second end defines a recess.

Abstract: A conductor guide member for a circuit breaker terminal assembly includes a body having at least one conductor guide surface configured and disposed to facilitate alignment between at least one terminal connection member of the terminal assembly and at least one conductor. The at least one conductor guide surface gradually slopes from a first end to a second end. The second end defines a recess.

Abstract: An apparatus to remotely reset a lock out mechanism of an electric distribution circuit breaker from a trip-free position includes a remote signal receiver to receive a remote reset signal and initiate movement of a lever based on the remote reset signal. The apparatus also includes a remote reset link assembly to move from a first position in response to the movement of the lever and cause a movement of a reset component. The movement of the reset component results in a reset of the lock out mechanism.

Abstract: A circuit breaker having a monolithic structure and method of making is disclosed. The monolithic structure includes an arm portion having copper and a contact portion having a composite material. The composite material has a metallic matrix and a second phase disposed in the metallic matrix. The method of making the monolithic structure includes introducing a first powder into a first region of a mold, introducing a second powder into a second region of the mold, and consolidating the first powder and the second powder together. The first region of the mold corresponds to a contact portion, and the second region corresponds to an arm portion of the monolithic structure of the circuit breaker.

Abstract: A cover assembly for a circuit breaker includes a cover, the cover including a first portion and a second portion. The first portion is configured to at least partially cover a current sensing element within the circuit breaker, and has an interior surface and a cover opening. The second portion extends from the interior surface of the first portion, and has a terminal pocket opening aligned with the cover opening. The cover is configured to receive a load terminal through the terminal pocket opening and cover opening.

Abstract: A conductor guide member for a circuit breaker terminal assembly includes a body having at least one conductor guide surface configured and disposed to facilitate alignment between at least one terminal connection member of the terminal assembly and at least one conductor. The at least one conductor guide surface gradually slopes from a first end to a second end. The second end defines a recess.

Abstract: In one embodiment, a shutter lock assembly for a circuit breaker cassette having a shutter coupled to a shutter rod is provided. The shutter lock assembly includes a lock plate assembly configured to couple to the circuit breaker cassette and an actuation mechanism having a first end coupled the lock plate assembly. The actuation mechanism is configured to actuate the lock plate assembly to lock the shutter of the circuit breaker cassette in a closed position.

Abstract: An apparatus includes an enclosure, a plurality of circuit breaker sub poles, each enclosed within a chamber of the enclosure, and a plurality of arc chutes, each installed on one of the chambers enclosing the circuit breaker sub poles.

Abstract: A circuit breaker with a locking mechanism is provided, which ensures that circuit breaker is switched OFF before applying any trip free locks. The circuit breaker includes a lay shaft coupled to the circuit breaker contacts, a lay shaft cam coupled to the lay shaft, a lifting plate configured to interface with the lay shaft cam, and a padlock plate configured to engage the lifting plate.

Abstract: Disclosed herein is a breaker interlock system. The system includes, a trip unit for a breaker, and a breaker receptive of the trip unit. The breaker is closable when the trip unit is assembled thereto and the breaker is non-closable when the trip unit is not assembled to the breaker. The interlock system is further configured to prevent disassembly of the trip unit from the breaker when the breaker is in a closed configuration. The breaker having a plurality of solenoids and each of the plurality of solenoids is in operable communication with the breaker to trip the breaker on command. A first of the plurality of solenoids is responsive to a signal from the breaker via the trip unit, and a second of the plurality of solenoids is responsive to an externally supplied signal from a source other than the electronic trip unit.

Abstract: A contact arm assembly including a plurality of substantially parallel plates having a space between each of the plurality of substantially parallel plates and a plurality of finger assemblies, at least one of the plurality of finger assemblies being pivotally attached to the plurality of substantially parallel plates and being located in the space between each of the plurality of substantially parallel plates, each of the plurality of finger assemblies having a body and an arc runner, the arc runner being locked against the body in at least two locations.

Abstract: Disclosed is a visual and electrical indication on the status of “Readiness to close” (RTC) for circuit breakers. Exemplary embodiments include a circuit breaker apparatus, including a lay shaft coupled to circuit breaker contacts, a lay shaft cam profile coupled to the lay shaft, a trip free plate coupled to the lay shaft cam profile, a trip paddle coupled to the trip free plate, wherein the trip paddle is coupled to a trip shaft and a ready to close indicator coupled to the trip free plate and charging cam assembly.

Abstract: A spring discharge mechanism for a circuit breaker is provided. The mechanism includes two linkages for crashing or discharging the circuit breaker compression springs to allow the circuit breaker to be used in either fixed breaker installation or in an installation having a drawout mechanism. The secondary mechanism includes a manual activation linkage that couples with an interface plate. The interface plate is coupled to an opening latch shaft and a closing latch shaft that cooperates to discharge the circuit breaker compression springs. An interface lever is also coupled to the interface plate. The interface lever includes a roller that interacts with a pivoting cam lever coupled to a drawout mechanism. The cam lever interacts with the roller causing the interface lever to rotate the interface plate, the opening latch shaft and the closing latch shaft.

Abstract: A system for indicating a position of an electrical distribution device configured to be racked into an electrically connected condition within an enclosure and racked out to an electrically disconnected condition via a racking mechanism is disclosed. The system includes a rotating indicator having at least a first position and a second position, the first position indicating the connected condition, and the second position indicating the disconnected condition, the indicator operably connected to the racking mechanism to rotate the indicator in response to movement of the racking mechanism between at least the connected condition and the disconnected condition. The system also includes a biasing device to bias rotation of the indicator toward the first position when the racking mechanism is in the connected condition and to bias rotation of the indicator toward the second position when the racking mechanism is in the disconnected condition.