Abstract: A mechanical interlock assembly for a network transformer primary disconnect assembly is provided. The mechanical interlock assembly includes a blocking member assembly with a body. The a blocking member assembly body includes an obstruction portion and a lacunar portion. The blocking member assembly is movably disposed adjacent to a movable operation contact carriage and a ground contact carriage. The blocking member assembly body is movable between a first position, wherein the blocking member assembly body obstruction portion is disposed in the path of the ground contact carriage, a neutral position, wherein the blocking member assembly body obstruction portion is disposed in the path of the ground contact carriage and the operation contact carriage, and a second position, wherein the blocking member assembly body obstruction portion is disposed in the path of the operation contact carriage.

Abstract: A housing assembly for a network transformer primary disconnect assembly is provided. The housing assembly includes a visible break assembly and a number of sidewalls defining an enclosed space. The visible break assembly includes a number of viewing windows in at least one sidewall. The viewing windows are aligned with one of a contact assembly interface or a movable contact assembly distal end in the open, first position.

Abstract: A mechanical interlock assembly for a network transformer primary disconnect assembly is provided. The mechanical interlock assembly includes a blocking member assembly with a body. The a blocking member assembly body includes an obstruction portion and a lacunar portion. The blocking member assembly is movably disposed adjacent to a movable operation contact carriage and a ground contact carriage. The blocking member assembly body is movable between a first position, wherein the blocking member assembly body obstruction portion is disposed in the path of the ground contact carriage, a neutral position, wherein the blocking member assembly body obstruction portion is disposed in the path of the ground contact carriage and the operation contact carriage, and a second position, wherein the blocking member assembly body obstruction portion is disposed in the path of the operation contact carriage.

Abstract: An adjustable wireway assembly for use in an electrical enclosure includes a panel structured to form a portion of the electrical enclosure, the panel having a first aperture defined therein. The assembly further includes a plate member selectively coupled to the panel about a portion of the first aperture in at least one of a first position and a second position in a manner that blocks at least a portion of the first aperture and thereby defines a second aperture formed from a portion of the first aperture. When coupled in the first position, the second aperture is of a first area and when coupled in the second position, the second aperture is of a second area different than the first area.

Abstract: An arc management system for an electrical enclosure assembly is provided. The electrical enclosure assembly includes a housing assembly and a conductive bus assembly. The arc management system includes a number of conductive bus extension assemblies, a number of first and second arc horn assemblies, and a number of ground conductor assemblies. Each conductive bus extension assembly includes a conductive member coupled to the conductive bus assembly. Each first arc horn assembly includes a conductive arc horn member. Each first arc horn member is in electrical communication with an associated bus extension conductive member. Each second arc horn assembly includes a conductive arc horn member. Each ground conductor assembly includes a ground conductive member. Each second arc horn member in electrical communication with an associated ground conductor assembly ground conductive member. Each first arc horn member is associated with a second arc horn member and disposed an effective distance therefrom.

Abstract: A drive assembly for an electrical switching apparatus racking assembly is provided. The drive assembly includes a positioning assembly, a motor assembly, and a control assembly. The positioning assembly is structured to impart movement to said carriage assembly and to move said carriage assembly from said first position to said second position. The motor assembly is structured to impart movement to said positioning assembly. The control assembly is structured to control said motor assembly. The control assembly is in electronic communication with the motor assembly. The motor assembly is operatively coupled to the positioning assembly.

Abstract: A racking assembly for an electrical apparatus is provided. The racking assembly includes a movable carriage assembly and a drive assembly. The movable carriage assembly is sized to fit within a housing assembly and is structured to be moved between a first position and a second position. The carriage assembly is further structured to support at least one electrical component. The drive assembly includes a motor assembly and a positioning assembly. The motor assembly is structured to impart movement to said positioning assembly. The motor assembly is coupled to said positioning assembly. The positioning assembly is structured to impart movement to said carriage assembly and to move said carriage assembly from said first position to said second position. The positioning assembly is coupled to said carriage assembly. In this configuration, the racking assembly is structured to move the carriage assembly, and therefore the electrical apparatus, between the first and second positions.

Abstract: An adjustable wireway assembly for use in an electrical enclosure includes a panel structured to form a portion of the electrical enclosure, the panel having a first aperture defined therein. The assembly further includes a plate member selectively coupled to the panel about a portion of the first aperture in at least one of a first position and a second position in a manner that blocks at least a portion of the first aperture and thereby defines a second aperture formed from a portion of the first aperture. When coupled in the first position, the second aperture is of a first area and when coupled in the second position, the second aperture is of a second area different than the first area.

Abstract: An improved vent apparatus that is usable with an electrical enclosure includes a vent flap that is movable between a closed position overlying an opening formed in a wall of the electrical enclosure and an open position wherein at least a portion of the vent flap is spaced from the wall. The vent flap may be held in place in the closed position via gravity or through the use of a retainer such as a spring or a frangible structure. The vent flap is a part of a flap apparatus that is formed as a unitary single piece element that may be stamped from sheet metal, for example, and the flap apparatus includes a number of hinge elements that are rollably disposed on an edge of the wall adjacent the opening.

Abstract: A secondary disconnect assembly is provided for a racking assembly of an electrical switching apparatus, such as a circuit breaker. The racking assembly movably couples the circuit breaker to a switchgear enclosure. The secondary disconnect assembly includes a mounting assembly having an elongated mounting member. The elongated mounting member has first and second opposing ends and first and second opposing sides. A sliding assembly is movably coupled to the first side between the first and second ends. A latching member is pivotably coupled to the sliding assembly. The latching member moves between an unlatched position corresponding to the circuit breaker being movable independently with respect to the sliding assembly, and a latched position corresponding to the latching member fixedly coupling the sliding assembly to the circuit breaker in order that the circuit breaker moves with the sliding assembly. The racking assembly may also include a position indicator.

Abstract: An energy storage and release control mechanism is provided for a stored energy assembly of an electrical switching apparatus. The stored energy assembly includes a shaft, a stored energy mechanism, and a charging mechanism, such as a charging cam. The charging cam is movable to pivot upon the shaft, thereby charging the stored energy mechanism. The energy storage and release control mechanism includes a ratchet coupled to the charging cam and including a plurality of teeth, a mounting assembly, and a plurality of pawl assemblies. Each pawl assembly includes a pawl pivoting between an engaged position corresponding to the pawl engaging the teeth of the ratchet to resist inappropriate movement of the charging handle, and a disengaged position corresponding to the pawl not engaging the teeth of the ratchet. Preferably, first and second pawl assemblies include first and second pawls, respectively, wherein only one of the first and second pawls engages the teeth of the ratchet at a time.

Abstract: A shutter assembly is provided for an electrical system including at least one withdrawable electric apparatus, such as a circuit breaker, and an electrical bus member. A protruding structure of the circuit breaker is removably coupled to a corresponding primary contact of the electrical bus member to electrically connect the circuit breaker and the electrical bus member. The shutter assembly includes a pair of cover members that each have a ramped engagement surface and that are movable between a first position in which the corresponding primary contact of the electrical bus member is isolated and a second position in which the cover members are offset from the primary contact to allow the circuit breaker to be connected with the primary contact and the electrical bus member.

Abstract: A coupling is for a racking assembly for racking an electrical apparatus into and out of an enclosure with an actuator. The electrical apparatus includes a housing. The racking assembly includes a safety interlock, which is movable between a locked position, and an unlocked position corresponding to the racking assembly being operable to rack the electrical apparatus into or out of the enclosure. The coupling includes an adapter having a first portion coupled to the racking assembly, and a second portion coupled to the actuator. A sleeve is movably disposed on the adapter. The sleeve moves the safety interlock from the locked position to the unlocked position. When the safety interlock is disposed in the unlocked position, the adapter transfers movement of the actuator to the racking assembly to move the electrical apparatus.

Abstract: A shutter assembly is provided for an electrical system including at least one withdrawable electric apparatus, such as a circuit breaker, and an electrical bus member. A protruding structure of the circuit breaker is removably coupled to a corresponding primary contact of the electrical bus member to electrically connect the circuit breaker and the electrical bus member. The shutter assembly includes a pair of cover members that each have a ramped engagement surface and that are movable between a first position in which the corresponding primary contact of the electrical bus member is isolated and a second position in which the cover members are offset from the primary contact to allow the circuit breaker to be connected with the primary contact and the electrical bus member.

Abstract: A secondary disconnect assembly is provided for a racking assembly of an electrical switching apparatus, such as a circuit breaker. The racking assembly movably couples the circuit breaker to a switchgear enclosure. The secondary disconnect assembly includes a mounting assembly having an elongated mounting member. The elongated mounting member has first and second opposing ends and first and second opposing sides. A sliding assembly is movably coupled to the first side between the first and second ends. A latching member is pivotably coupled to the sliding assembly. The latching member moves between an unlatched position corresponding to the circuit breaker being movable independently with respect to the sliding assembly, and a latched position corresponding to the latching member fixedly coupling the sliding assembly to the circuit breaker in order that the circuit breaker moves with the sliding assembly. The racking assembly may also include a position indicator.

Abstract: A coupling is provided for a racking assembly for racking an electrical apparatus into and out of an enclosure with an actuator. The electrical apparatus includes a housing. The racking assembly includes a safety interlock, which is movable between a locked position, and an unlocked position corresponding to the racking assembly being operable to rack the electrical apparatus into or out of the enclosure. The coupling includes an adapter having a first portion coupled to the racking assembly, and a second portion coupled to the actuator. A sleeve is movably disposed on the adapter. The sleeve moves the safety interlock from the locked position to the unlocked position. When the safety interlock is disposed in the unlocked position, the adapter transfers movement of the actuator to the racking assembly to move the electrical apparatus.