Abstract: Disclosed herein is a pole component assembly for a circuit breaker. The pole component assembly for a circuit breaker includes an external insulating housing made by injecting resin into a housing mold, applying injection pressure to mold the injected resin, and separating the molded resin from the housing mold, and a circuit breaker portion assembly detachably inserted into the external insulating housing after the external insulating housing is made. According to embodiments of the present disclosure, the external insulating housing is molded without a main circuit breaker component when manufacturing a sealed type pole component, and the main circuit breaker component is assembled into the finished external insulating housing, thereby preventing the main circuit breaker component from being contaminated or damaged.

Abstract: The invention relates to a short-circuiting device for use in low-voltage and medium-voltage systems for protecting parts and personnel, comprising a switching element which can be operated by the tripping signal of a fault detection device, two mutually opposite contact electrodes having power supply means, wherein contact can be made with said contact electrodes at an electrical circuit having connections at different potentials, furthermore, in at least one of the contact electrodes, a moving contact part which is under mechanical prestress and executes a movement to the further contact electrode in a manner assisted by spring force in the event of a short circuit, a sacrificial element as spacer between the contact electrodes and also having an electrical connection between the sacrificial element and the switching element on the one hand and one of the contact electrodes on the other hand, in order to cause current flow-induced thermal deformation or destruction of the sacrificial element in a targeted m

Abstract: An electric switch includes a first and a second connection terminal for connecting the switch to an external circuit; a first switch assembly, which includes two or more electric breaker elements connected in series to one another and to the first and the second connection terminal; a second switch assembly, which includes at least one delayed electric breaker element connected in parallel to the first switch assembly. A moving actuator is made of insulating material and is associated with the first and the second switch assembly to open or close them. The moving actuator is movable between a closed switch position in which electrical continuity is established between the first and the second connection terminal, and an open position in which current flow between said terminals is prevented.

Abstract: An electrical power distribution system includes a first bus bar and a clamp mounted to the first bus bar. The clamp includes a fixed base and a movable plate that define a track therebetween along a broad face of the first bus bar. The track receives a second bus bar therein such that the broad face of the first bus bar engages a corresponding broad face of the second bus bar. The clamp includes a lever connected to both the movable plate and the first bus bar. Pivoting movement of the lever in a locking direction forces linear movement of the movable plate relative to the first bus bar towards the fixed base such that respective inner sides of the movable plate and the fixed base sandwich the second bus bar therebetween to secure the second bus bar in engagement with the first bus bar.

Abstract: In order to provide a simple and reliable configuration capable of detecting whether an arc is a serial arc or a parallel arc and extinguishing these arcs, a solar photovoltaic system protecting apparatus determines whether or not an arc is present in a state where a first relay (41P, 41N) is closed and a second and a third relay (42, 43P, 43N) are open, identifies whether the arc is a parallel arc or a serial arc in a state where the first relay (41P, 41N) and the second relay (42) are closed, and opens the first relay (41P, 41N) in a case where a serial arc has been generated and closes the third relay (43P, 43N) in a case where a parallel arc has been generated.

Abstract: Switch gear for interconnecting a plurality of power transmission lines including a number of high voltage switches arranged in three phases for routing power in multiple directions. The switches are pre-mounted on a beam to form a three phase unit as a unitized assembly which is attached in the field to a vertical support structure. Each phase includes a vertical break switch and two side break switches for a three-way switch. For a two-way, each phase includes two side break switches. The vertical break switch and the two side break switches for each phase are operatively and electrically connected to a common electric power interrupter. The unitized assembly for each phase has the insulators and power interrupter arranged in cantilevered horizontal relationship with the beam which is attached to the vertical support structure. Operating links between phases are operatively connected in a push-pull relationship with the high voltage outdoor electric switches.

Abstract: A mechanical-puffer-type arc-extinguishing chamber includes a fixed main contact, a movable main contact that moves on an opening-and-closing axis in a connectable and disconnectable manner to and from the fixed main contact, and a mechanical puffer chamber that is provided in the movable main contact and blows compressed insulation gas to an arc. A thermal-puffer-type arc-extinguishing chamber includes a fixed contact, a movable contact that moves on the opening-and-closing axis in a connectable and disconnectable manner to and from the fixed contact, and a thermal puffer chamber in which compressed insulation gas is blown to the arc. The mechanical-puffer-type arc-extinguishing chamber and the thermal-puffer-type arc-extinguishing chamber are arranged in series on the opening-and-closing axis, and two breaking portions are electrically connected in series.

Abstract: A switch for polarity-independent multi-pole direct current operation includes at least two switching chambers. Each switching chamber includes a single circuit breaker with a stationary contact having a first contact region and a movable electrically conductive contact part having a second contact region. The stationary contact and movable contact part are configured to create a connection between the first and the second contact regions in the ON state and to disconnect the first and the second contact regions in the OFF state. Each chamber also includes two arc chutes for quenching an arc forming between the first and the second contact regions when switching to the OFF state. At least two magnets are configured to generate a magnetic field so as to exert a magnetic force on the arcs to divert each are in a direction of an arc chute independent of the direction of current.

Abstract: A switch for multi-pole direct current service independent of polarity includes a plurality of switching chambers. Each chamber includes a double interrupter having two separate fixed contacts with a first contact area, a movable contact piece with two second contact areas, each for creating a connection between the contact areas in an ON state and for separating the contact areas in an OFF state, and at least two quenching devices for quenching arcs occurring, when the OFF state is brought about. The switch also includes magnets for exerting a magnetic field in an area of the contact areas to exert a magnetic force on the arcs and drive the arcs, independent of their current direction, in the direction of one of the erasing devices. The contact pieces are disposed with the second contact areas essentially in a line perpendicular to a direction of motion of the arcs.

Abstract: A medium voltage switch unit comprising an interruption unit and a disconnection unit, wherein the interruption unit comprises a first and a second interruption contact and a first drive unit which moves one of said interruption contacts between a first position in which they are in electrical connection and a second position in which they are spaced apart. The disconnection unit comprises a first and a second fixed disconnection contacts couplable and uncouplable with respective first and second movable disconnection contacts mounted on the interruption unit and electrically connected to the first interruption contact. The interruption unit is mechanically supported by a first fixed conductor and the second interruption contact is electrically connected to said first fixed conductor.

Abstract: A high-voltage, super-voltage and heavy current breaker is formed by combining intelligent optical vacuum breaker modules (21) with phase selection function in series and/or parallel connection. Each vacuum breaker module (21) is connected each other in series after being connected in parallel with a resistance capacitance device or with a resistance capacitance device and a zinc oxide arrester valve plate (22). Tight coupling reactors are connected with several serial branches of the vacuum breaker module (21) simultaneously to achieve parallel connection of several serial branches of the vacuum breaker module (21). The breaker distributes the high-voltage and heavy current into the low voltage and low current serial and parallel vacuum breaker modules (21) to share.

Abstract: A load breaker arrangement includes first and second input terminals, respectively, and first and second output terminals. The arrangement also includes two relays connected in series with one another, wherein the two relays are coupled between the second input terminal and the second output terminal, a semiconductor switch connected in parallel with one of the two relays, and a third relay coupled between the first input terminal and the first output terminal. A control circuit, in a load breaker mode, turns on the semiconductor switch while the two relays and the third relay are closed, then opens the one of the two relays in parallel with the semiconductor switch, then opens the semiconductor switch to break a current between the second input and second output terminals, and then opens the other of the two relays not in parallel with the semiconductor switch and opens the third relay.

Abstract: An alternator disconnector circuit-breaker of the invention presents a compact structure. The axes of opening/closure of the change-over first switch (12, 14), of the circuit-breaker second switch (22, 24), and of the disconnector switch (32, 34) are such that an angle of 90° is present between two of them. Actuator means (40) associated with synchronization means (52, 54, 56, 58) make it possible to ensure that each switch is operated in a time-shifted manner by common control means.

Abstract: A connector switchpanel for medium voltage switchgear assemblies includes first and second feed devices connected together by conductors with a busbar branch on a connector. Disconnectors disconnecting the conducting connection and disconnecting the busbar branch and grounding contacts are provided. An improved compact construction and simplified operation are provided due to the connector switchpanel being a gas-insulated switchpanel and each of the first and second feed devices being connected by a three-position switch to the busbar branch with contact, disconnecting and grounding positions.

Abstract: A multi-pole circuit breaker having the same number of sensors and controllers as poles. One pole is monitored by a first sensor and a first controller, which are disposed on a first circuit board. Another pole is monitored by a second sensor and a second controller, which are disposed on a second circuit board that is cable-connected to the first circuit board. A ground-fault sensor monitors the sum of current flowing through the line conductors and a neutral conductor, and the output of the ground-fault sensor is provided to one or both of the controllers. Each controller is operable to detect arc faults on the respective line that it is monitoring, and at least one is operable to detect ground faults. A push-to-test algorithm is executed in relay fashion, with one controller executing the test before passing the result of the test onto the next controller, which in turns executes the test.

Abstract: A switch unit comprising a circuit breaker and a disconnector disposed in one plane and fixed to a metal casing. Common drive means comprise: a single insulating drive bar adapted to move in a straight line in the same plane as the plane of straight line movement of the movable contacts of the circuit breaker and disconnector; and at least one mechanical assembly mounted in the metal casing, at least part of the mechanical assembly being driven by the single insulating drive rod while permitting non-simultaneous straight-line movement of the two movable contacts.

Abstract: A high-voltage switch configuration having a subdivision housing, which is supported on a frame by an insulating supporting housing, and having a switch which is fitted to this subdivision housing and has an insulator, a switching chamber surrounded by the insulator, and disconnectible contacts which are accommodated in the switching chamber. The switch can be switched via a switching linkage that can be operated by a drive and is arranged within the supporting housing and the subdivision housing. At least three switches are attached to the subdivision housing, and each switch has a separate associated switching linkage with a separate drive.

Abstract: An alternator disconnector circuit-breaker of the invention includes a cylindrical cam (40) for optimizing the sequence for opening/closing the switch-over first switch (10), the circuit-breaker second switch (20), and the disconnector third switch (30). The cam (40) has a cylindrical wall in which three slots (42), and preferably three pairs of slots, of different shapes, are defined; an end element of an element driving a respective one of the switch contacts is mounted to slide in each slot.

Abstract: A first switch (10) has a first pair of contacts (12, 14) that are mounted to move relative to each other in translation. A circuit-breaker second switch (20) has a second pair of contacts (21, 24) that are mounted to move relative to each other in translation, the second switch (20) being put in parallel with the first switch (10). A disconnector third switch (30) has a third pair of contacts (32, 34) that are mounted to move relative to each other. Synchronization means (50, 50?) make it possible, while breaking is taking place, for the contacts of the first switch (10) to separate before the contacts of the second switch (20) separate, the contacts of the second switch themselves separating before the third contacts (32, 34) separate fully. The synchronization means are actuated by a servomotor (40).

Abstract: An electrical switching system, preferably a medium-voltage switching system, has a power switch or load switch, a disconnecting switch, and a grounding switch configured as a vacuum switching chamber. Low separation distance lengths and a more compact construction of a switching system is achieved by means of a housing in which the disconnecting switch, configured as a vacuum switching chamber, the grounding switch, and the power switch or load switch are disposed, and in which a central switch is disposed, with which the vacuum switching chambers of disconnecting switch and grounding switch can be mechanically activated. Electrical connections between connector contacts of power switch or load switch, disconnecting switch, and grounding switch can be produced.

Abstract: An adjustable switching mechanism for adjusting the tolerance of electrical contacts of series coupled vacuum interrupters includes a primary drawbar coupled to a secondary drawbar via a pair of coupling pull rods. The primary and secondary drawbars are adjustably attached to the coupling pull rods by a plurality of adjustable compression assemblies. The primary drawbar also includes an attachment bore having threads of one dimension to threadably receive a double-threaded part therethrough. The double-threaded part also includes an internal bore having threads of another dimension in which to receive a coupling screw. As such, the tolerance between the electrical contacts of the vacuum interrupters may be changed through adjustment of the compression assemblies and the rotation of the double-threaded part.

Abstract: An electrical switching device has a first interrupter unit for interrupting and connecting an electrical line, in particular an air-insulated grounding switch. A method for switching an air-insulated grounding switch assures that no arc owing to a voltage flashover is produced on the air-insulated grounding switch. A second interrupter unit, which is connected in parallel with the first interrupter unit, can be switched such that resultant striking of an arc during switching only takes place in the second interrupter unit.

Abstract: In an integrated type gas-insulated switching apparatus, a plurality of switching devices are provided. Each of switching devices includes a contact and an insulated container in which the contact is contained. The contact comprises electrodes adapted to be contacted with each other and separated therefrom. The insulated container is filled with an insulating gas. A conductive container is provided, to which the plurality of switching devices are connected, respectively. An insulated structure supports the conductive container.

Abstract: A power use circuit breaker includes an arc generating switching unit which adds an electrical resistance in a circuit during current interruption to attenuate a current to be interrupted, a vacuum bulb which is electrically connected in series with the arc generating switching unit and interrupts the attenuated current and a current conducting switching unit connected in parallel with the series circuit of the vacuum bulb and the arc generating switching unit. For current conduction the current conducting switching unit is closed after the vacuum bulb and the arc generating switching unit are closed, and for current interruption after opening the current conducting switching unit, the vacuum bulb and the arc generating switching unit are opened.

Abstract: In an integrated type gas-insulated switching apparatus, a plurality of switching devices are provided. Each of switching devices includes a contact and an insulated container in which the contact is contained. The contact comprises electrodes adapted to be contacted with each other and separated therefrom. The insulated container is filled with an insulating gas. A conductive container is provided, to which the plurality of switching devices are connected, respectively. An insulated structure supports the conductive container.

Abstract: A gas insulated switchgear capable of performing maintenance and inspection of a breaker without shutting down a bus line includes a first case containing a breaker and having a bushing for leading a load and a second case containing a plurality of disconnectors and having a plurality of bushings for leading a plurality of bus lines to be connected to the disconnectors. The first case and the second case are connected to each other through a gas partition spacer.

Abstract: In an integrated type gas-insulated switching apparatus, a plurality of switching devices are provided. Each of switching devices includes a contact and an insulated container in which the contact is contained. The contact comprises electrodes adapted to be contacted with each other and separated therefrom. The insulated container is filled with an insulating gas. A conductive container is provided, to which the plurality of switching devices are connected, respectively. An insulated structure supports the conductive container.

Abstract: A gas-insulated switchgear device for high- and medium-voltage applications, comprising an enclosure which contains a disconnection unit which is electrically connected to a first electric terminal and is arranged in the enclosure in a substantially central position, and a first interruption unit and a second interruption unit which can be connected electrically to the disconnection unit and, respectively, to a second electric terminal and a third electric terminal, the first and second interruption units being arranged mutually opposite with respect to the disconnection unit.

Abstract: A gas insulated switchgear capable of performing maintenance and inspection of a breaker without shutting down a bus line includes a first case containing a breaker and having a bushing for leading a load and a second case containing a plurality of disconnectors and having a plurality of bushings for leading a plurality of bus lines to be connected to the disconnectors. The first case and the second case are connected to each other through a gas partition spacer.

Abstract: A gas-insulated switchgear device. A casing is provided with a first connection terminal and a second connection terminal, an interruption unit, and a disconnection unit. The disconnection unit includes a first fixed contact connected to the second connection terminal. A second fixed contact is at ground potential. A third fixed contact is connected to the first connection terminal. A first moving contact can be coupled to the third fixed contact. A second moving contact can be coupled to at least one of the first and second fixed contacts, and is electrically connected to the interruption unit. The second moving contact is rigidly fixed to a rotating actuation element. At least one of the first and second fixed contacts lies on the rotation plane of the second moving contact. The interruption unit includes an interruption chamber having a rotating case with a stationary contact and a mobile contact. A longitudinal axis of the interruption chamber is aligned with the rotating actuation element.

Abstract: One of the foregoing objectives is basically attained by providing an insulator assembly including a terminal pad having a base that has angularly oriented first and second portions. A first opening in the first portion of the base facilitates connecting to the switch assembly. A second opening in the second portion of the base receives a fastener.

Abstract: A circuit breaker includes a plurality of poles that are connected with one another in parallel, and additionally includes a mutual connection connecting the poles with one another to isolate the trip units associated with the poles from any imbalance in the current flowing through the poles. Each pole includes a first conductor structured to be connected with a power source, a second conductor structured to be connected with an electrical load, and a pair of separable contacts that disconnectably connect the first conductor with the second conductor. The trip unit of each pole is configured to measure the current flowing through a given point of the second conductor, and the mutual connection connects the second conductors together at a connection point, the connection point of each second conductor being between the separable contacts and the given point.

Abstract: A vacuum switch comprises a first vacuum container containing therein a circuit breaker, a second vacuum container containing therein the first vacuum container and grounded, and a third vacuum container connected to the second vacuum container, containing therein a disconnecting switch and an earth device and grounded. The second and third vacuum containers are isolated in vacuum from the first vacuum container, and the second vacuum container is electrically insulated from the first vacuum container. The second vacuum container contains an insulator fixed to a conductor connected to the circuit breaker and a movable rod partially disposed out of the vacuum containers and operating the circuit breaker to open and close. The disconnecting switch, circuit breaker and the insulator are arranged in a line. A vacuum switchgear comprises the above-mentioned vacuum switches of the number corresponding to three phases and necessary components, each being contained in a metal box.

Abstract: A group operated circuit disconnect apparatus for overhead electrical power lines includes an operator controlling a plurality of disconnect switches. Each disconnect switch includes a vacuum circuit interrupter mounted inside an insulating bushing. Current is transferred from a terminal pad through the vacuum circuit interrupter to a vacuum terminal pad by attaching a silver-plated contact nut to a movable contact end of the vacuum circuit interrupter and using a rocker type contact assembly to connect the contact nut to the vacuum terminal pad. A rotating insulator of the disconnect switch drives a make/break mechanism that opens and closes the contacts inside the vacuum circuit interrupter. The rotating insulator turns a frame assembly so that an appropriate point in operation a trip point is reached and springs quickly rotate an actuator assembly driving the movable vacuum contacts at a high speed to the open or close position.

Abstract: An actuator mechanism that decreases the time needed to move the contacts of a circuit interrupter between a closed circuit position and an open circuit position to reduce the probability of the occurrence of restrikes. The actuator mechanism uses a toggle spring arrangement that uses a single spring to move the interrupter through both an opening stroke and a closing stroke. The interrupter is designed to connect to the circuit in parallel, so that the interrupter is not normally in the circuit when the circuit is closed. Because the interrupter is not normally in the circuit, it can be manufactured to less stringent standards than those that apply to electrical components that normally remain in the circuit. The interrupter is well adapted for use as a puffer-type interrupter in which the contacts of the interrupter are contained in an arc-extinguishing gas, such as sulphur-hexaflouride (SF6) gas to further reduce the probability of restrikes and to minimize the effect of occurring restrikes.

Abstract: Electric circuit breaker with means for adjusting the contacts comprising, for each electric phase, moving levers having main contacts and arc-breaking contacts co-operating with main contacts and arc-breaking contacts provided on a terminal bar there being provision for the levers loaded by springs to be supported by a crank pivoting about a pin and for the crank to be operationally connected to a link-rod articularly joined to an operating shaft and for each end of the operating shaft to have translatable and position-adjustable supports.

Abstract: A high-voltage metal-cladded switchgear having two busbars (1, 2) and a power switch (4) with a first connected to terminals (12, 13) of two isolating switches (10, 11). The power switch has a contact point (17) that can be removed from the enclosure (3) together with the power switch (4) and has at least two contact devices for connection to the terminals (12, 13) of the isolating switches (10, 11). No assembly work is necessary inside the enclosure (3). The internal conductors are connected by inserting the power switch (4).

Abstract: A high voltage open-air switch has a movable disconnect switch blade which contains a circuit interrupter therein having interrupter contacts in series with the open air disconnect switch contacts. The circuit interrupter has a lower BIL rating than the switch. An operating mechanism causes the independent operation of the interrupter and disconnect switch such that there is a high speed opening of the interrupter contacts, followed by the low speed opening of the disconnect switch contacts, and a slow speed closing of the disconnect switch contacts followed by the high speed closing of the interrupter contacts. The switch can be adapted to numerous switch configurations and permits substantial savings in space by the reduced mounting space requirements for the interrupter assembly.

Abstract: A resistance-provided UHV breaker includes a tank, a main contact unit, a resistance unit, and a resistance contact unit. The main contact unit includes plural main contacts arranged in the axial direction of the tank. The resistance unit includes plural resistances arranged in the axial direction of the tank. The resistance contact unit cooperates with the resistance unit to form a resistant parallel circuit and it is arranged, crossing the axial direction of the tank. The main and resistance contact units are opened and closed by an operating mechanism arranged outside the tank.

Abstract: In a double-break type circuit breaker having resistor contacts which are to be connected in parallel with main contacts in not only closing operation but also breaking operation, the resistor contacts are opened by a force due to loading of elastic members in the breaking operation and the elastic members are loaded for storing the driving force In the closing operation.

Abstract: The invention discloses a vacuum contactor assembly for controlling current flow in a single or multi-phase electrical circuit wherein each phase of the electrical circuit is controlled by a single vacuum interrupter. The stem pressure or pressure exerted on the electrical contacts of each vacuum interrupter during and after closing may be individually adjusted to an optimum operating pressure. The individual interrupter stem pressure adjustment is accomplished by placing a spring and an adjustment nut on the stem screw between the operating arm and the interrupter stem. By adjusting the free length of the spring with the adjusting nut, the interrupter stem pressure may be controlled.

Abstract: A gas insulated circuit breaker includes a closed tank filled with an insulation gas, one pair of separable contacts disposed in the closed tank, a supporting frame supporting the closed tank, an opening spring for performing an opening operation of the pair of contacts, a closing spring for performing a closing operation of the pair of contacts, and an actuating mechanism box accommodating an opening coil which is adapted to receive a circuit opening command for the contacts, a closing coil which is adapted to receive a circuit closing command for the contacts and an actuating mechanism for rendering the opening spring and the closing spring operative in response to an activation of the opening coil and the closing coil. A first spring casing accommodates the opening spring and is secured on the closed tank, and a second spring casing accommodates the closing spring and is secured on the supporting frame.