Abstract: A dampening mechanism for an electrical for an electrical switching apparatus, such as a draw-out circuit breaker, includes a mounting bracket coupled to the circuit breaker, a pivot member, at least one biasing element, and a damper. The circuit breaker is movable into and out of an installed position within a switchgear enclosure. The pivot member pivots between first and second positions corresponding to the circuit breaker not being fully installed and being disposed in the installed position, respectively. The biasing element biases the pivot member toward the first position. When the circuit breaker is moved toward the installed position, the second end of the pivot member engages at least one of a back panel and a ledge of the enclosure, thereby pivoting the pivot member toward the second position. When the pivot member is disposed in the second position, the damper is biased against the ledge of the enclosure to dampen undesired vertical motion of the circuit breaker.

Abstract: A control box arrangement including at least one control box which is sub-divided, or which can be sub-divided, into a plurality of cuboid compartments, including functional compartments, by wall sections, where vertical wall sections with a horizontal sub-division are provided. A collecting bar arrangement including a distributing bus bar arrangement guides the current, in order to supply electrical energy to appliance components which are arranged in the functional compartments accessible from the front side. An advantageous arrangement of functional compartments and the energy supply of components received therein is achieved by the distribution buses of the distributing bus bar arrangement are guided through a plurality of vertical functional compartments arranged one above the other and separated by horizontal partition bottoms, are mounted inside the compartments, and covered in a protected manner.

Abstract: Disclosed is a racking mechanism for a drawout circuit breaker including a cross shaft movably positioned in an enclosure and at least one input link in operable communication with the cross shaft via at least one connecting link. At least one racking cam is movably positioned in the enclosure and is in operable communication with the input link. Each racking cam has at least one cam slot receptive of a portion of the circuit breaker. Movement of the cross shaft about an axis of the cross shaft is capable of moving the at least one racking cam from an open position toward a closed position with the portion of the circuit breaker disposed in the at least one cam slot, thereby securing the circuit breaker in the enclosure and the at least one racking cam is in the closed position. A method for securing a circuit breaker in an enclosure and a circuit breaker assembly are also disclosed.

Abstract: A Medium Voltage panel that comprises: a casing having internal walls that define at least a first, a second and a third compartment, respectively housing a circuit breaker unit, a bus-bar system and a cable system, and in which at least a portion of the walls between the circuit breaker compartment and the bus-bar compartment, and between the circuit breaker compartment and the cable compartment are made of insulating material. In the panel, for each phase: the circuit breaker unit comprises a first and a second connection contacts; a third connection contact is positioned in the second compartment and is connected to a corresponding bus-bar; a fourth and a fifth connection contacts are positioned in the third compartment and are respectively connected to a corresponding cable and to ground. Also, the circuit breaker unit is movable between three positions so as to realize three different operating states of the panel.

Abstract: Various embodiments of an electronic system and method for removing a power module from an electronic system are provided. The electronic system includes a power module that supplies power to a load and is movable along an axis from an enabling position to a disconnected position. The electronic system also includes a release control that restricts the movement of the power module along the axis when the power module is moved beyond a disabling position located between the enabling position and the disconnected position.

Abstract: The invention relates to an electric switching system which comprises a housing and components which are arranged therein and which are embodied as a control and/or measuring unit. Said components are arranged in modular-type drawers. At least one base module comprises at least one module support profile, in addition to lateral walls and front-sided insertion elements. One front wall of the base module, preferably the front side thereof, is formed by a control unit and the opposite front wall thereof of the measuring unit, and the dimensions of the control and measuring unit are adapted to the size of the module.

Abstract: An electrical distribution device assembly includes a drawout substructure having at least first and second opposing side portions. The electrical distribution device assembly also includes a telescoping rail unit mounted to one of the first and second opposing side portions. The telescoping rail unit includes a carrier rail having a carrier rail support surface and a loading rail having a loading rail support surface. The loading rail is slidably supported by the carrier rail to define an extended deployed configuration and a retracted stowed configuration. The electrical distribution device assembly also includes an electrical device is supported upon at least one of the carrier rail and the loading rail and is selectively shiftable into and out from the drawout substructure.

Abstract: Replacing, and in particular extending, the body of an outdoor distributor cabinet includes removing the body of the old distributor cabinet, slipping a new hollow base over the old assembly frame and the old base. A new body, which has at least the same inner capacity as the old body, is placed on top of the old assembly frame, aligned therewith, and secured. Accordingly, the distributor cabinet remains in its original position, whereby no new authorization for installation or building permit is required.

Abstract: The invention relates to a frequency converter, comprising: a power electronics part provided with wheels on the lower part thereof; an installation cabinet for receiving the power electronics part movable on the wheels; and connectors arranged to the power electronics part and the installation cabinet, a contact being created between the connectors when the power electronics part is installed into the installation cabinet. To facilitate electrical installation works, the power electronics part is divided at least into a base part provided with wheels and a power stage part arranged thereon, the two being detachably attached together, whereby the base part, when detached from the power stage part, can be pulled out of the installation cabinet whereas the power stage part remains in place in the installation cabinet.

Abstract: A system and method for connecting supply power to motor control components includes use of a motor control center subunit with moveable supply power contacts. After a motor control center subunit is secured into a motor control center compartment, the supply power contacts may be advanced to engage supply power buses. For disconnection, the supply power contacts may be retracted and isolated from the buses before physical removal of the subunit.

Abstract: A system and method for connecting supply power to motor control components includes use of a motor control center subunit with moveable supply power contacts. After a motor control center subunit is secured into a motor control center compartment, the supply power contacts may be advanced to engage supply power buses. For disconnection, the supply power contacts may be retracted and isolated from the buses before physical removal of the subunit. A free wheeling mechanism prevents supply power contacts from advancing and retracting past a preset travel range.

Abstract: A plug-in housing module for forming an especially explosion-proof switchgear/distribution panel with a number of plug-in points contacts electrical connection devices when occupying its plugged-in position, and is detachably fixed to carrier rails or the like of a frame of the switchgear/distribution panel in the plugged-in position. The aim of the invention is to improve such a plug-in housing module in such a way that, without switching the entire panel off circuit, a plug-in housing module can be easily inserted into a corresponding plug-in point or removed therefrom even by an untrained person.

Abstract: An apparatus and method for cable management via hook and loop type materials are provided. The apparatus includes a substrate and a tie wrap. In at least one embodiment, the substrate is coupled to a rigid frame that is capable of accommodating a plurality of cables. The substrate and the tie wrap each have engaging mechanisms that enable them to create a hook and loop type releasable bond when pressed into contact with each other. The tie wrap is shaped to define an elongated body and a head portion having an interior opening. The body of the tie wrap may be pulled through the interior opening of the head portion in order to provide support for cables.

Abstract: A seal assembly for an electrical enclosure having a draw-out circuit breaker and a number of conductors is provided having a movable first seal member and a movable second seal member. The circuit breaker includes a protruding nose portion that is engaged by the first and second seal members in a manner that sealingly engages the nose portion. The arrangement of the first and second seal members and the nose portion provides for the sealing engagement to be maintained when the circuit breaker is moved from a first position in which the circuit breaker is not electrically connected to the number of conductors and a second position in which the circuit breaker is electrically connected to the number of conductors.

Abstract: A cradle and a method for adapting a circuit breaker for mounting in a switchgear cabinet having a bus bar system. The cradle includes a frame to which a racking apparatus and a locking apparatus are mounted. The racking apparatus is operable to move the cradle into and out of electrical connection with the bus bar system. The locking apparatus has a first operating state, wherein the locking apparatus prevents the circuit breaker from being disposed in the frame and allows the racking apparatus to operate, and a second operating state, wherein the locking apparatus allows the circuit breaker to be disposed in the frame and prevents the racking apparatus from operating.

Abstract: The invention relates to a distribution cabinet which is usually set up outdoors and accommodates the technical, for example electrical or optical, distribution installations for, for example, weak-current systems, for example telephone systems, with associated power-supply devices and cable-terminal/connection devices for a certain area, and also to a method for exchanging, in particular increasing the size of, the body of a distribution cabinet, the exchange of which body is unproblematical and with which method the distribution cabinet remains at the original location and consequently no new installation approval or construction approval is necessary.

Abstract: A securing mechanism is provided for an electrical switching apparatus, such as a circuit breaker, which is movable into and out of an installed position within a switchgear enclosure. The securing mechanism includes a mount coupled to the circuit breaker, and a movable assembly movably coupled to the mount and including an engagement member. The movable assembly moves among first and second positions corresponding to the circuit breaker not being fully installed within the switchgear enclosure and being disposed in the installed position, respectively. When the circuit breaker is moved toward the installed position, the engagement member engages the switchgear enclosure and moves the movable assembly toward the second position, in which the engagement member securely engages the switchgear enclosure to resist undesired movement of the circuit breaker with respect to the switchgear enclosure.

Abstract: Disclosed is a draw in-out apparatus that is suitable for an air circuit breaker having large capacity and size, the apparatus comprising: a movable plate meshed with the thread portion of a spindle so as to be movable back and forth; rack gear installed on the movable plate so as to be movable back and forth along with the movable plate moving back and forth; pinion gear installed to be meshed with the rack gear and rotatable according to the rack gear moving back and forth; a cam rotatable by a rotational driving force transferred from the pinion gear by being provided with a teeth portion meshed with the pinion gear and having a radius larger than those of the pinion gear so as to amplify a torque transferred from the pinion gear and provided with a cam slot portion for enduring a load of the main body and a reaction force generated when the main body and the cradle are electrically connected to each other while the main body is moved to a connected position; a pivot disposed on the cradle at a position ad

Abstract: A modular UPS system is provided wherein UPS systems may be constructed using a number of different frame components. In one example, a core UPS frame is provided that can accept different combinations of power and battery modules, and an extension frame is provided that can be combined with the core frame to provide a larger UPS system. According to one example, both the core and extension frame types may be used in either a standalone or rack-mounted configuration. Another aspect relates to packaging of UPS components such that the UPS frame need not include serviceable items. In another aspect, a rail system is provided that allows for easier installation of heavy components into rack-mount systems.

Abstract: A kit for producing a frame superstructure for switchgear cabinets including a cupboard frame having four horizontal width struts, four horizontal depth struts and four vertical frame legs having a predetermined width, depth and height. A vertical frame includes two horizontal width struts and two vertical frame profiles which are insertable into in the cupboard frame and connectable to the depth struts thereof. Covering elements are connectable in the form of external and internal elements to two vertical frames which are spaced so that an independent base frame is formed. At least one cupboard door is pivotally fixable to the covering elements. This invention makes it possible to obtain a great number of embodiments with several simple elements.

Abstract: The invention relates to an electric switching system which comprises a housing and components which are arranged therein and which are embodied as a control and/or measuring unit. Said components are arranged in modular-type drawers. At least one base module comprises at least one module support profile, in addition to lateral walls and front-sided insertion elements. One front wall of the base module, preferably the front side thereof, is formed by a control unit and the opposite front wall thereof of the measuring unit, and the dimensions of the control and measuring unit are adapted to the size of the module.

Abstract: An arc resistant switchgear assembly is provided having a front wall, a rear wall, a bottom surface, an upper surface, a first side wall, and a second side wall opposed to the first side wall and spaced a first distance from the first side wall, with each of the first and second side walls having an upper portion and a lower portion, and with each of the first and second side walls having an inner and an outer surface, with at least the lower portion of both the first side wall and the second side wall having at least one blow-off panel detachably secured thereto by fastening means. Each of the panels is detachably secured to the outer surface of the side wall to which each is secured. The assembly has a vertical plenum formed directly adjacent both the first and the second side walls, with the outer surface of each of the first and second side walls defining an inner side wall of each of the vertical plenums.

Abstract: A multiple-hole terminal lug is for a circuit breaker including a load terminal and a conductive terminal extension coupled thereto. The multiple-hole terminal lug includes a mounting portion and a receiving portion having a plurality of receptacles for electrically coupling a corresponding plurality of electrical cables to the load terminal. Secondary mounting holes in the mounting portion align with primary mounting holes in the terminal extension in order to receive fasteners therein and secure the multiple-hole terminal lug in a first or second mounting configuration sloping upward or downward with respect tot the longitudinal axis of the terminal extension.

Abstract: The movable conductors of a three phase isolation switch are incorporated into the electrically insulative molded shaft, thereby mechanically supporting them and isolating them from the metal axle of the shaft. Movable contacts on the ends of each movable conductor are angularly spaced by ? degrees, where ? is less than 180° and is 90° in the exemplary embodiment. A common fixed load contact is located angularly between, and spaced ? degrees from, both the fixed line and ground contacts so that the shaft is rotated only ? degrees between a first, closed position, in which the movable conductors connect the fixed load contact for each phase to the corresponding fixed line contact, and a second, grounded position, where the fixed load contact of each phase is connected by the movable conductor to the corresponding fixed ground contact.

Abstract: A cable management appraratus for routing at least one cable from a first location to a second location in an electrical equipment support system. The cable management apparatus includes a flexible support member, which extends curvilinearly between the first location and the second location, and at least one retention feature disposed along the length of the flexible support member for supporting at least one cable.

Abstract: A gas-insulated switchgear comprising bushings mounted to and passing through a vessel wall of the hermetic vessel, each having an outer end connected to an insulated bus conductor at the outside of the hermetic vessel and an inner end connected to the electric device within the hermetic vessel. Each of the bushings has a central axis that is perpendicular to the common axis of the electric device and spaced apart from each other in the direction of extension of the common axis and shifted by a predetermined angle with respect to each other about the common axis. The flat bushing mounting vessel walls are tilted from inside to outside relative to other portion of the wall.

Abstract: A draw out unit with improved drawout box and handle assembly is disclosed. The drawout box is designed to accommodate an improved terminal assembly of the present invention, which reduces the dimensions of the box, and further provides access to the interior of the box by providing an open side for allowing service of an electrtical device within the bucket thus permitting the motor control center to remain active during service. The drawout box of the present invention further includes an improved handle assembly with operable connection to a circuit breaker handle within the confines of the smaller drawout box.

Abstract: In an air circuit breaker, the present invention provides an air circuit breaker including an interlock apparatus which is capable of controlling translocation accurately by preventing a deformation and a bent of a lead bar and minimizing a tolerance in production by constructing the lead bar as two separated bodies and including a guide means for guiding a movement of the lead bar.

Abstract: An object is to provide a key protection structure for an electronic apparatus which can prevent a preset value of a switch from being intentionally changed by the user or the like. When setting of a first switch 21 is ended, a tool shutter operation portion 72 of a lock key 70 is inserted into a first shutter operation hole 61. The tool shutter operation portion 72 is then engaged with an engaging recess 45 of a first shutter 40. Thereafter, the lock key 70 is rotated, so that the first shutter 40 is rotated. A covering portion 44 of the shutter is therefore moved immediately above the first switch 21 to close a first switch operation hole 58, whereby the first switch 21 can be locked (key-protected) so as not to be externally operated.

Abstract: An electrical equipment rack includes an electrical equipment unit that slides in and out of the rack on two drawer slides. A hinge attaches a first cable management arm to the rack or to a first drawer slide, which is attached to the rack. Another hinge attaches a second cable management arm to the equipment unit or to a second drawer slide, which is attached to the equipment unit. A flexible linkage is connected between and joins each of the free ends of the two cable management arms. Cables for interconnecting two or more equipment units are attached to the cable management arms and flexible linkage. The equipment unit can be extended out the front or back of the rack for servicing, and each of the cable management arms can be rotated away from the equipment unit to permit easy access to the unit. The flexible linkage limits the bend radii of the cables without regard to the position of the cable management arms or the position of the equipment unit relative to the rack.

Abstract: A drawout unit is dimensioned to make more efficient use of the space within the drawout unit. Devices within the drawout unit are positioned in a generally vertical configuration. A bus brace serves as a line/load terminal assembly. The bus brace has receptacle ports enabling lugs to maintain electrical contact with vertically oriented bus bars on the line terminals and transfer current to horizontally oriented load terminals. Output cables extend horizontally from the load terminals and form a single right angle bend before passing out of the bottom of the drawout unit through an exit port.

Abstract: A draw out unit with improved drawout box and handle assembly is disclosed. The drawout box is designed to accommodate an improved terminal assembly of the present invention, which reduces the dimensions of the box, and further provides access to the interior of the box by providing an open side for allowing service of an electrical device within the bucket thus permitting the motor control center to remain active during service. The drawout box of the present invention further includes an improved handle assembly with operable connection to a circuit breaker handle within the confines of the smaller drawout box.

Abstract: A mechanism is provided for moving a circuit breaker (12) with respect to a circuit breaker connecting apparatus (14) so as to connect or disconnect the circuit breaker from the circuit breaker connecting apparatus. The mechanism includes a draw bracket assembly (29) having a draw bracket (30) constructed and arranged to be mounted to the circuit breaker connecting apparatus (14) so as to be generally adjacent to a side of the circuit breaker connecting apparatus. A guide engaging member (36) is mounted for generally vertical movement with respect to the draw bracket (30). The guide engaging member (30) has a slot structure (42) therein having surfaces constructed and arranged to receive and engage a guide (26) associated with the circuit breaker (12) for moving the circuit breaker with respect to the circuit breaker connecting apparatus (14). A drive member (55) is provided and has a movable element (56).

Abstract: An electronic trip unit is adapted for connection to a circuit breaker for circuit interruptions. The electronic trip unit includes a frame module shaped to define a recess. An electronics module is releasably connected to the frame module. The electronics module has a housing, a circuit board assembly, and a facing surface providing access for adjustment of the electronics module. The housing of the electronics module is sized and shaped to fit at least partially within the recess defined by the frame module. An engagement surface is positioned for releasable engagement between the frame module and the electronics module in order to permit removal and replacement of the electronics module with respect to the frame module.

Abstract: An apparatus for providing precise alignment between primary and secondary contacts mounted on a circuit breaker and associated stationary primary and secondary contacts located with substantial precision with respect to X, Y and Z coordinates and mounted on a back panel of a switchgear breaker compartment. A locking/locate cradle is provided with two generally parallel guide rails that slidably receive and support the circuit breaker within the breaker compartment. The precise X, Y and Z-axes alignment of the guide rails with the X, Y and Z axes position of the stationary primary and secondary contacts on the back panel is crucial for proper mating and connection with the associated breaker primary and secondary contact. The back panel is provided with at least one alignment slot having two indexing sections spaced apart by an aligning section.

Abstract: An electronic enclosure assembly having a logic chassis, a forward extension member attached to one end of the logic chassis wherein each side of the forward extension member has side pieces, each of the side pieces having a face and a notch. The enclosure further includes a removable chassis having a front side and a rearward side and sized to fit between the side pieces and slidably movable on the extension until it is engaged with the logic chassis. An activation handle having side members is pivotally attached on the sides and at front end of the removable chassis and is movable between an up position and a down position. The ends of the side members and the notches of the side pieces of the logic chassis cooperate for camming the removable chassis into engagement with the logic chassis when the activation handle is moved to its up position and for camming the removable chassis away and disengaging the removable chassis from the logic chassis when said activation handle is returned to its down position.

Abstract: An enclosure for electrical switching apparatus has a base formed by a planar member which extends horizontally to support the enclosure on a support surface. The planar member is generally rectangular with an upturned flange along at least one edge and preferably along three edges, including the front edge and the adjoining side edges. At least one, and preferably a spaced pair of pry slots are provided in these three edges. The pry slots extend into the planar member and the flanges to provide leverage for pry bars. The flanges are stiffened by inwardly directed lips extending along their free edges. The enclosure includes a front section and a rear section with the planar member forming the base for the front section. The electrical switching apparatus is mounted in the front section so that the center of gravity of the enclosure is located there. Preferably, the pair of pry slots both in the front edge and side edges straddle the center of gravity.

Abstract: A modular node assembly for a rack mounted multiprocessor computer in which the node assembly has a logic chassis and a removable chassis. The logic chassis contains logic cards including memory cards, a service processor card, Central Processing Unit (CPU) processor cards, and Input/Output (I/O) cards to which I/O and processor interconnecting cables are attached. The removable chassis contains the power supply module for the node, a node supervisor card, disk drives and cooling fans. The removable chassis is removable from the logic chassis without moving or disturbing the logic chassis. One fan of a pair of cooling fans in the removable chassis draws air through the power supply, which has relatively higher cooling needs, and blows the air into the logic chassis over logic modules having relatively lower cooling needs.

Abstract: A device for affecting a traveling system of a switching device, which blocks the traveling system to prevent its operation when a door of a switchboard cell is opened. The device includes a blocking lever mounted on the traveling system and a push rod that can be operated by the door. The push rod and has a leg that can be displaced by movement along an inclined face. The blocking lever engages the leg via a contact angle. The blocking lever can be operated in each of the positions of the switching device inside the switchboard cell to block or release the traveling system.

Abstract: For a fast and simple mounting and unmounting of guide rails for electrical components of electrical devices in guide rails, the guide rail set is provided, which is engaged in the frame parts by being placed against and axially displaced in the frame parts of the electrical device. An unmounting occurs, among other things, by pressing a spring tongue responsible for the engagement back to release the rail for movement for unmounting.

Abstract: In a drawer type circuit breaker of the invention, when a first contact is clockwise pivoted by a switching mechanism, the contact tip of the first contact and the contact tip of a second contact are touched, and when the first contact is further clockwise pivoted, the second contact is counterclockwise pivoted against the elastic force of a spring to secure a predetermined contact pressure and a predetermined wiping stroke. A first drawer contact clamps the outer circumferential portion of the first contact and a first external connection terminal together by the elastic force of a spring to establish connection between the first contact and the first external connection terminal. A second drawer contact clamps the outer circumferential portion of the second contact and a second external connection terminal together by the elastic force of another spring to establish connection between the second contact and the second external connection terminal.

Abstract: Fuses for the potential transformers (PTs) in medium voltage switchgear are mounted in fuse assemblies which are reciprocated within the switchgear enclosure independently of the transformers they protect between a connected position in which the fuse assemblies engage stabs at the rear wall of the enclosure and a retracted position adjacent a door at the front of the enclosure through which the fuses are inserted and removed while the fuse assemblies remain within the enclosure. The fuse assemblies include insulative tubes having first releasable contacts at a distal end which engage the stabs and second releasable contacts which engage fixed contacts connected to the transformers and spaced from the rear wall. The insulative tubes are mounted on a carriage which reciprocates between the connected and retracted positions. An interlock prevents opening of the door except where the carriage is in the retracted position and blocks movement of the carriage with the door open.

Abstract: A control unit forms a control center serving as one type of a control panel in an electric power system control system. The control unit accommodates equipments such as a circuit breaker, an electromagnetic switch, a zero-phase current transformer, and an operating transformer, and includes a substantially Z-shaped equipment mounting plate mounted between side plates of the unit to have an intermediate bent portion. The circuit breaker is disposed on a front face of a front mounting portion of the equipment mounting plate, and the current transformer is disposed on a back face thereof. The electromagnetic switch is disposed on a front face of a back mounting portion of the equipment mounting plate, and the thin operating transformer is isolated from other equipments and disposed on a back face thereof.

Abstract: A motor controller includes an isolation switch having a main power supply terminal and a first bolted pressure contact and a load receptacle having a second bolted pressure contact. The motor controller also includes a drawout unit having a line terminal and a load terminal, the line terminal for engaging the first bolted pressure contact when the drawout unit is in an inserted position and the load terminal for engaging the second bolted pressure contact when the drawout unit is in the inserted position. The drawout unit rests on a drawer which is in turn supported by a pair of sliding rails. A current transformer generates a sensing signal for monitoring purposes. The components are arranged in a compact design which requires significantly less space than conventional designs.

Abstract: In a drawout type switch gear, rotation of the lead screw (7) is locked automatically at the connected position and the test position of the drawout/push-in unit (R), symbols or marks for representing these positions are provided on an indicator plate (18), which is driven laterally behind the front panel of the circuit breaker by a cam-rod type motion-direction transforming link (23, 19, 21, 18) and is arranged to be visible through display windows (15c) provided on the front panel (15). The insertion of the detachable handle (111) into a polygonal hole (7a) provided on the front end of the lead screw (7) is Inhibited by a blocking arm (110a), which is interlocked with a lock plate (16) driven by motion of the drawout/push-in unit (R).

Abstract: A drawer-type circuit interrupter is constructed with a first contact member having an open-and-close contact member, an open-and-close operation mechanism for operating said first contact member, an interrupter main body having a second contact member and a mounting frame having the external line contact terminals, wherein the second contact member is a movable-type provided with an open-and-close contact portion that is contactable with and separable from the first contact member on the one end thereof and a drawer contact member that contacts with an external line contact terminal on the other end thereof, and a compression spring for urging the second contact member into a direction for contacting the external line contact terminal on the other end of the second contact member. When the interrupter body is in the connected position the drawer contact portion on the other end of said second contact member and said external line contact terminal are into contact.

Abstract: A distribution switchboard cubicle has upper and lower ring channels; left and right corner posts attached to the ring channels for forming a support skeleton for a front face of the cubicle; and left and right intermediate posts attached to the ring channels for forming in conjunction with a corresponding corner post and the ring channels a support skeleton for left and right sides of the cubicle. First and second vertically aligned, selectively reconfigurable cubicle sections are defined within the cubicle. The first cubicle section includes at least one generally horizontally oriented mounting member for connecting each pair of corner and intermediate posts on the left and right sides of the cubicle. Left and right breaker mounting angles are connected to each respective horizontally oriented mounting member for mounting a first electrical apparatus thereto.

Abstract: A racking mechanism (30) for switchgear cubicle (20) draw-out units (24) including a base (39); and a drive screw assembly (44) attached to the base (39) including a screw block (36) translated by rotation of the screw. The screw block (36) is adapted for selective coupling to a draw-out unit (24). Drive surfaces (72) are constructed on the drive screw assembly (44). A biased racking shield (52) which surrounds at least a portion of the drive surfaces (72) in a first position is translatable to a second position by exerting counter-biasing force against the racking shield, in order to expose a portion of the drive surfaces (72). A crank assembly (76) having a socket portion (80) is engageable with the drive surfaces (72) when the racking shield (52) is translated to its second position, in order to rotate the drive screw (44).