Abstract: A guide assembly for a switchgear assembly is provided. The guide assembly includes an elongated support member and a passage. The support member is coupled to and extends from a housing assembly rear sidewall. The support member extends in the circuit breaker assembly direction of travel. The passage is disposed on the circuit breaker assembly base and also extends in the circuit breaker assembly direction of travel. The support member is substantially aligned with the passage. In this configuration, as the circuit breaker assembly moves between a withdrawn position and an installed position, the support member moves between a first position, wherein the support member is not disposed in the passage, and a second position, wherein the support member is partially disposed in the passage. When the support member is in the second position, the support member bears a portion of the weight of the circuit breaker assembly base.

Abstract: A guide assembly for a switchgear assembly is provided. The guide assembly includes an elongated support member and a passage. The support member is coupled to and extends from a housing assembly rear sidewall. The support member extends in the circuit breaker assembly direction of travel. The passage is disposed on the circuit breaker assembly base and also extends in the circuit breaker assembly direction of travel. The support member is substantially aligned with the passage. In this configuration, as the circuit breaker assembly moves between a withdrawn position and an installed position, the support member moves between a first position, wherein the support member is not disposed in the passage, and a second position, wherein the support member is partially disposed in the passage. When the support member is in the second position, the support member bears a portion of the weight of the circuit breaker assembly base.

Abstract: An interlock assembly for a circuit breaker housing assembly and a circuit breaker extraction device wherein the interlock assembly has a first and second component. The first component is coupled to a circuit breaker housing assembly and the second component is coupled to a circuit breaker extraction device. The first component includes a rail obstruction assembly that is structured to move between a first position, wherein the movable rail obstruction element blocks a circuit breaker wheel from traveling over a circuit breaker housing assembly rail, and a second position, wherein the movable rail obstruction element is spaced from the circuit breaker housing assembly rail so that a wheel may travel over the circuit breaker housing assembly rail. The second component is structured to engage the first component when the circuit breaker extraction device is brought adjacent to the circuit breaker housing assembly and to move the movable rail obstruction element from the first position to the second position.

Abstract: A linear actuator which includes a housing assembly, a shaft assembly disposed within the housing assembly, a plurality of flat magnets disposed within said housing about said shaft, and a structure to support the magnets. Because the magnets are flat magnets, the components that support the magnets may be machined with tolerances that virtually eliminate the air gap between the magnets and the support structures.

Abstract: An erosion gauge tool for measuring the erosion of a movable contact in a circuit breaker having a stationary contact and movable contact, both of which are sealed in a housing. The movable contact is coupled to a drive insulator. An erosion mark is etched on the housing adjacent to the drive insulator. The erosion gauge tool has a handle, a tab, and a pointer. The tab is adapted to rest on the drive insulator. The pointer is disposed adjacent to erosion mark when said tab is resting on said drive insulator. As the moveable contact erodes, the pointer moves closer to the erosion mark. The erosion gauge is sized to indicate when the moveable contact needs to be replaced, e.g. when the pointer is immediately adjacent to or above the erosion mark.