222results about "Switchgear with horizontal withdrawal" patented technology

A method and a door arrangement for a switchgear enclosure, with the enclosure having a top and bottom panel, a back panel and two opposing side panels. The enclosure includes an interior framework supporting a draw-out circuit breaker. The door arrangement comprises a front extension coupled to the enclosure. An exterior door is pivotably mounted in an offset position to the front extension and configured to move from one of a closed position and an open position on one side of the enclosure. The breaker door is pivotably mounted to the interior framework and configured to move from one of a closed position and an open position on another side of the enclosure and move clear of the offset exterior door.

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 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 closure device for a withdrawable rack adapted for receiving power circuit breaker includes a plate arrangement having at least two plates provided with openings and movable relative to one another so that the plate arrangement is changeable between an open position in which the openings of the plates are in alignment and a closed position in which the openings are out of alignment. An actuating mechanism is acted upon by the power circuit breaker as it is inserted to cause a movement of at least one of the plates to thereby change the plate arrangement between the closed and open positions. The actuating mechanism includes two V-shaped linkage assemblies. Each linkage assembly has two legs connected by a hinge to allow the linkage assembly to spread apart, with one of the legs having a free end which is connected to the at least one of the plates, and a coupler is connected to the hinge. Both couplers are jointly articulated to actuating element.

Disclosed is a main switch conveying apparatus for a vacuum circuit breaker. The main switch conveying apparatus for a vacuum circuit breaker installed in a cage having electrical load and source terminals, the main switch conveying apparatus includes a carriage for conveying the main switch loaded on the carriage in such a manner that the main switch is coupled to or separated from the terminals, a carriage actuating assembly including a lead screw for providing a driving force to move the carriage and provided with braking recesses at the predetermined positions on the lead screw in such a manner that the carriage is stopped at a test position, a safety position and a run position of the main switch, and a conveying nut fixed on the carriage to mesh with the lead screw and movable together with the carriage relatively to the lead screw, a girder assembly detachably supported on both front sidewalls of the cage for supporting one end of the lead screw to rotate, a brake assembly installed on the carriage for stopping the carriage by locking the lead screw at positions of the braking recesses; and a brake releasing assembly for releasing the locking of the brake assembly. The carriage having the main switch loaded thereon moves along the lead screw, while allowing the main switch to be positioned in the safety, test and run positions of the main switch. The user easily recognizes the position of the main switch. If the main switch conveying apparatus is inversely operated, the movement of the main circuit is stopped so that the main circuit is precisely and rapidly moved.

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. The outer surface of the first side wall defines the inner side wall of one of the vertical plenums and the outer surface of the second side wall defines the inner side wall of an adjacent vertical plenum.

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.

Transmission of electrical signals can be conducted over a rail. The rail, which may be an at least partially open rail structure, may be disposed within an enclosure, and can be used to transmit data and power signals to an assembly of electrical components. A connector assembly may also be provided to facilitate the transmission of data and power signals between the components and the rail.

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.

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.

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.

A system and method are provided for remotely actuating a subunit disconnect in a motor control center subunit. A motor control center subunit includes a subunit housing configured to fit within a motor control center and a subunit disconnect configured to selectively control a supply power to motor control components of the subunit housing. A control mechanism is attached to the subunit housing to activate and deactivate the subunit disconnect and a remote control device communicates with the control mechanism and is configured to operate the control mechanism to activate and deactivate the subunit disconnect.

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.

A system and method are provided for coordinating the installation and removal a motor control center subunit with the power connection and interruption thereof. A system of interlocks and indicators causes an operator to install a motor control center subunit into a motor control center, and connect supply and control power thereto, in a particular order. Embodiments of the invention may prevent actuation of line contacts of the bucket, and shield the line contacts, until the bucket is fully installed in the motor control center. Other embodiments also prevent circuit breaker closure until the line contacts are engaged with a bus of the motor control center.

A system and method are provided for remotely actuating a subunit disconnect in a motor control center subunit. A motor control center subunit includes a subunit housing configured to fit within a motor control center and a subunit disconnect configured to selectively control a supply power to motor control components of the subunit housing. A control mechanism is attached to the subunit housing to activate and deactivate the subunit disconnect and a remote control device communicates with the control mechanism and is configured to operate the control mechanism to activate and deactivate the subunit disconnect.

An exhaust system for exhausting gases and molten debris caused by an electric arc within a switchgear. The exhaust system includes a switchgear having lower and upper compartments and an exhaust unit externally mounted to the switchgear. A wall panel of the switchgear includes blow out panels coinciding with openings in the lower compartment and corresponding ventilation flaps in a top surface of the exhaust unit to exhaust gas from the lower compartment out the blow out panels in a vertical direction, exiting through the flaps. The upper compartment includes ventilation flaps for exhausting gas in a vertical direction directly through the flaps and optionally through side-mounted blow out panels that communicate with the vertical vent path to the flaps in the top of the exhaust unit. A bus compartment in the exhaust unit includes a vent path to flaps in the top of the exhaust unit for exhausting gas produced by bus arcing.

The invention discloses a modular stacked switch cabinet which comprises a cable chamber module, a circuit breaker chamber module and a bus chamber module. The various modules are provided with module shells, the module shells are of case structures, the shell of the cable chamber module is adjacently connected with the shell of the circuit breaker chamber module, and the shell of the bus chamber module is adjacently connected with the shell of the circuit breaker chamber module, so that the cable chamber module, the circuit breaker chamber module and the bus chamber module are assembled with one another in a stacked manner and are detachably fixedly connected with one another; holes are formed in corresponding surfaces of each two module shells which are adjacently connected with each other, and isolation movable contacts or isolation fixed contacts can penetrate the holes so as to be connected with one another or isolated from one another. The module stacked switch cabinet has the advantages that various function units can be assembled while the various branch modules of a cabinet body are assembled, and accordingly the difficulty in assembling components inside the cabinet body can be greatly reduced.

A system and method are provided for remotely actuating a subunit disconnect in a motor control center subunit. A motor control center subunit includes a subunit housing configured to fit within a motor control center and a subunit disconnect configured to selectively control a supply power to motor control components of the subunit housing. A control mechanism is attached to the subunit housing to activate and deactivate the subunit disconnect and a remote control device communicates with the control mechanism and is configured to operate the control mechanism to activate and deactivate the subunit disconnect.

Provided is a GIS (Gas Insulated Switchgear) with a withdrawable circuit breaker unit including a main bus compartment having a main bus-bar unit, a transfer bus compartment including a transfer bus-bar unit, a sealing circuit breaker compartment including a circuit breaker unit and an outgoing compartment including a current transforming unit and a cable terminal being electrically coupled to the transfer bus-bar unit. The circuit breaker unit is contained in the sealing circuit breaker compartment that is separately independent from other compartments. The circuit breaker unit is withdrawn and inserted without interrupting power supply of the outgoing compartment. The circuit breaker unit is electrically coupled to or isolated with the main bus-bar unit and the current transforming unit according to whether the circuit breaker unit is withdrawn from or inserted to the sealing circuit breaker compartment. The sealing circuit breaker compartment and the outgoing compartment do not share insulation gas.

A cabinet structure for a switchgear assembly. The cabinet structure includes a cabinet having upper and lower vents and a breaker cradle for holding a circuit breaker having primary disconnects for connecting the circuit breaker to bus bars. The cabinet further includes an air passageway located between the upper and lower vents, wherein the air passageway extends vertically through the primary disconnects and the cabinet. Further, the cabinet includes a fan module having at least one fan for drawing outside air through the lower vent, the air passageway and the primary disconnects for cooling the primary disconnects.

The present invention is directed to a system for modifying a circuit breaker for removable installation in a cell of switchgear system, wherein the unmodified circuit breaker is not adapted for mounting in the cell. The system includes an adapter frame to which the circuit breaker is mounted and gear assemblies mounted to opposing sides of the circuit breaker. The gear assemblies adapt a racking device of the circuit breaker so as to be operable to rack the circuit breaker within the cell of the switchgear system.

A switch arrangement for an electrical switchgear comprising a first bus, a second bus and a load connection. The switch arrangement comprises a breaker; wherein said breaker is moveable in said switchgear between a first position and a second position, such that in use, when said breaker is in said first position and closed it electrically connects said first bus to said load connection, and when said breaker is in said second position and closed it electrically connects said second electrical bus to said load connection, with said first electrical bus disconnected from said load connection.

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.

A power drive stack system comprises a series of power electronic modules, each one of the modules containing power components and module contacts electrically and mechanically aligned for building a portion of a complete AC / DC drive stack. The modules utilize a common set of circuit connection points that are matched to a common set of physical connection points. The modules can be plugged together like building blocks to form a large variety of AC / DC drive stacks that can be tailored to meet an exact system requirement. The drive stack may be used in conjunction with a controller to adjust the torque and speed of an AC / DC electric motor.

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.

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.