Abstract: A fast acting switching mechanism for a circuit breaker includes a drive rod articulated to a drive module and supporting at an end thereof a contact bridge having at opposite ends thereof respective moveable contacts for switchably engaging a pair of fixed contacts of the circuit breaker. A contact spring unit is operatively coupled to the drive module for applying closing pressure in the order of 200 Kg; and a latch latches the drive rod in an open or closed position after operation of the circuit breaker and prevents rebounds. The contact bridge includes a pair of side conductors supporting on upper edges thereof an armature having an exposed upper surface that supports the moveable contacts at opposite ends of the armature; and a reinforcing element inserted between the side conductors.

Abstract: A configurable circuit breaker is disclosed which is, for example, applicable for medium voltage range, with flexibility in configuration, based on the electrical and mechanical constraints. The circuit breaker can include multiple poles, which can be fitted on a shaft at desired positions, using clamping, dowelling, bolting or other types of connections. An epoxy frame can mount the circuit breaker on a truck horizontally or vertically, by mounting inserts and the clamping mechanism. Side sheets of the pole allow internal access. Flexible contacts and the vertical slots enable adjustability in the incoming and outgoing distances, as per design constraints. A tulip contact can be provided for mounting incoming/outgoing conductors. A common actuator can be mounted anywhere on the shaft, via the movable contact or on any of the poles, which are robust enough.

Abstract: A vacuum circuit breaker includes a movable-side conductor that is tubular and comprises an inside cavity. A movable side contact case includes a chamber which communicates with a space on a non-vacuum side of a bellows. The chamber is isolated from a space filled with insulating gas in a ground tank by a sealing device. The chamber communicates with an outside atmosphere through the inside cavity of the movable-side conductor.

Abstract: [Object] A compact gas-insulated switching apparatus in which the space for arranging a gas breaker module may be reduced, and the space for arranging a circuit wiring may be reduced in the vertical direction is proposed.

Abstract: A low-voltage circuit breaker that comprises: a containment structure; a control mechanism; a plurality of circuit breaking poles, each of which comprises a housing containing a scaled ampoule that in turn contains at least one fixed contact and at least one moving contact, which can be mutually coupled and uncoupled, said housing consisting of a first side and a second side that define an interior containing said ampoule, the outer side wall on said first side being complementary to and associable with the outer side wall of said second side, said poles being located side-by-side to form a set of poles complementary to at least a part of said containment structure; operative connection means between said control mechanism and said poles.

Abstract: The vacuum insulated switch includes a vacuum container; two stationary contacts contained in the vacuum container; two movable contacts contained in the vacuum container, each capable of contacting and separating from a corresponding one of the stationary contacts; a vacuum insulated actuating rod connected to the two movable contacts; an operating rod connected to the vacuum insulated actuating rod via a metal bellows; and a guide for guiding the operating rod. The vacuum insulated switch has an off-axis displacement allowing structure which is provided between the guide and the operating rod for allowing the off-axis displacement of the operating rod.

Abstract: A vacuum insulated switchgear has a busbar compartment, in which phase-segregated double-break, three-position vacuum circuit breakers are disposed; and feeder compartments disposed at both sides of the busbar compartment respectively, in each of which phase-segregated double-break, three-position vacuum circuit breakers are disposed. The busbar compartment and the feeder compartments are aligned in a row, and a second-phase insulated busbar is provided to connect one of the fixed contacts of a second-phase breaker in the busbar compartment to a fixed contact of a second-phase breaker in one of the feeder compartments. A first-phase insulated busbar is provided to connect one of the fixed contacts of a first-phase breaker in the busbar compartment to a fixed contact of a first-phase breaker in one of the feeder compartments adjacent to the busbar compartment, and the second-phase insulated busbar and the first-phase insulated busbar are disposed in different positions in height.

Abstract: The gas-tight, high or medium voltage electric switch device (1), containing an insulating gas under pressure, comprises switch contacts (2) capable of occupying an open position and a closed position and disposed inside a composite insulator formed by a rigid tube (3) surrounded by an elastomer casing (4) whose outside surface defines a succession of annular fins. The rigid tube and the elastomer casing are arranged so as to define an observation window (7) that is at least translucent, and through which the open or closed position of the switch contacts is visible.

Abstract: A switching installation including a gas-filled enclosure, an input conductor, an actuator and a short-circuit device. The actuator is arranged to actuate the short-circuit device upon the occurrence of a first arc in the enclosure. The short-circuit device creates, upon being actuated, a short-circuit through the solid insulation between the input conductor and the enclosure or a separate ground point. The actuator can be arranged to react on an increase in pressure in the enclosure upon the occurrence of the first arc. The gas can be air or SF6. The short-circuit device can create, upon being actuated, the short-circuit through a section of a solid cable insulation isolating the input conductor from the enclosure.

Abstract: A remotely controlled, motorized drive system for a disconnector used in switchgear. An operator pushes a button on a remote control, which signals a receiver in the disconnector to engage a motor that is coupled to a drive shaft. The drive shaft causes movable contacts of the disconnector to be moved into engagement or out of engagement with sets of fixed contacts in the switchgear that are connected to the line supply and to the circuit breaker that is bolted into the switchgear. One set of contacts is electrically coupled to the line supply, which can carry up to three phases of current. Another set of contacts is connected to corresponding terminals of the circuit breaker. A second motor controls movement of a grounding bar that grounds the circuit breaker to earth. Indicator lights on the switchgear panel indicate the position of the disconnector for visual confirmation of the same.

Abstract: A current-interrupting chamber is filled with a dielectric fluid and includes a moving assembly. The moving assembly is mounted to move axially between a position at the start of a circuit-breaker opening operation and a position at the end of a circuit-breaker opening operation. The moving assembly has a first compression chamber whose volume decreases between the start position and a position in which the first chamber is open; a first arcing contact designed to co-operate with a second arcing contact; and a second compression chamber communicating with the first compression chamber. The volume of the second compression chamber decreases between the start position and the end position. The second compression chamber is designed to inject fluid into the first compression chamber, between the open position and the end position, when the pressure in the first chamber is lower than the pressure in the second chamber.

Abstract: A circuit breaker includes at least trip mechanism component that has been provided with a splatter resistant surface. The splatter resistant surface significantly reduces the amount of metal splatter that adheres to the component, increasing the reliability of the circuit breaker. The splatter resistant surface may be created by coating the trip mechanism component with a solid lubricant or by applying a solid lubricant to the trip mechanism component in tape form.

Abstract: Disclosed is a circuit breaker having an automatic release linkage capable of preventing damage and deformation of elements by automatic linkage release before electro-impulsive force generated from within the circuit breaker by a large short-circuit current causes the damage and deformation of open/close linkage.

Abstract: A subsea switchgear apparatus including a frame, at least one electrical power inlet mounted to the frame, at least one electrical power outlet mounted to the frame, a distribution chamber mounted to the frame, and at least one canister mounted to the frame. The at least one canister includes a chamber accommodating at least one high voltage circuit breaker. Electrical connections are arranged in the distribution chamber for electrically connecting a respective circuit breaker of a canister to an associated power inlet and power outlet of the switchgear apparatus. The chamber of the respective canister is separated from the distribution chamber by a pressure barrier.

Abstract: An electrical circuit breaker includes a first contact piece with a first consumable contact; a second contact piece with a second consumable contact; a drive for moving the first contact piece along a switching movement axis; and a transmission for transmitting the movement of the first contact piece to a movement of the second contact piece. The transmission has a first lever, a pivoting element which can pivot about a pivoting shaft, and a transmission mechanism for transmitting a pivoting movement of the pivoting element to a movement of the second contact piece.

Abstract: A circuit breaker which includes first and second contact pairs and a contact arm arranged in series. A first arm contact and a first terminal contact from a first line terminal form a first contact pair. A second arm contact and a second terminal contact from a second line terminal contact form a second contact pair. The first contact pair, contact arm and second contact pair are connected in a series arrangement in which the air gaps formed when the first and second contact pairs are separated combine to form an effective air gap which is double in size and thus increases an interrupting capacity of the circuit breaker. An arc chamber is associated with the first and second contact pairs for extinguishing an arc formed in the air gaps. The first and second contact pairs may also be arranged in a parallel configuration for increasing an amperage rating of the circuit breaker.

Abstract: A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

Abstract: A switchgear apparatus is provided in which an impact induced by a close operation is mitigated, featuring space saving and high reliability with low costs. The switchgear apparatus includes a switching unit 3 that is composed of a fixed electrode 1 and a movable electrode 2; a movable shaft 4 that is extended from the movable electrode 2; an operating mechanism 5 that produces driving force and transfers the driving force to the movable shaft 4; a switching-unit holder 6 that holds the switching unit 3 and the movable shaft 4 thereinside; and a holder supporting unit 7 that has a fixing plane so as to fix the switching-unit holder 6 thereonto. The switchgear apparatus is arranged in such a manner that the holder supporting unit 7 serving as the fixing plane is constituted of a plurality of plates layered in the axial direction along the movable shaft 4.

Abstract: A circuit breaker includes a vacuum valve, an electromagnet including a first coil for driving an operating shaft of the vacuum valve toward an opening direction by electromagnetic repulsion, a movable core and a permanent magnet. Further, an operating mechanism is provided which excites the first coil to close the vacuum valve, holds the vacuum valve closed by an attractive force of the permanent magnet and excites the first coil in a direction reverse to an excitation direction in closing operation to open the vacuum valve. In the circuit breaker, together with the first coil, a second coil is disposed which is excited simultaneously with an electromagnetic repulsion coil for a quick opening operation by electromagnetic repulsion is provided in the electromagnet.

Abstract: The switching chamber is intended for a gas-insulated high-voltage switch. It contains a housing filled with insulating gas and a contact arrangement held in the housing. The contact arrangement has, in a coaxial arrangement, the following components: two switching pieces, which are capable of being moved relative to one another along an axis, with in each case one arcing contact and in each case one tubular conductor containing a rated current contact, an insulating nozzle, and a compression apparatus with a fixed piston and a cylinder. A moveable tubular conductor of the two tubular conductors forms the wall of the cylinder, is electrically conductively and rigidly connected to one of the two arcing contacts via a base of the cylinder and bears the insulating nozzle.

Abstract: A vacuum insulated switchgear comprising a vacuum container accommodating at least a pair of movable contacts and a pair of fixed contacts, wherein the movable contacts are capable of taking three positions, the switchgear being a double-break three-position type switch having breaking and disconnecting functions.

Abstract: A reliable, compact vacuum switchgear is provided at an inexpensive cost. The vacuum switchgear comprises a switch 1 having a fixed electrode 12 and a movable electrode 13 connectable to and disconnectable from the fixed electrode 12, another switch 2 having a fixed electrode 22 and a movable electrode 23 connectable to and disconnectable from the fixed electrode 22, conductors 3 connected to the fixed electrodes 12, 22 of the switches 1, 2, earth switches 4 connected to the conductors 3, a mold section 7 formed by molding the conductors 3 and the earth switches 4 with resin, and a vacuum container 8 accommodating the switches 1, 2 and disposed on the mold section 7.

Abstract: Disclosed is a gas insulation circuit breaker with a structure for decreasing friction. The gas insulation circuit breaker comprises: a movable side supporting plate; a cylinder mounted so as to perform a reciprocating movement in a state that an outer surface thereof comes in contact with an inner surface of the movable side supporting plate; a contact spring for conduction disposed between the movable side supporting plate and the cylinder; and a movable arc contactor and a fixed arc contactor installed at the movable side supporting plate and the cylinder, respectively, and contacting and separated from each other by movement of the cylinder, wherein an end of the cylinder is tapered, and the outer surface of the cylinder comes in contact with the contact spring for conduction after a predetermined time lapses in a state that the cylinder has started to perform a closing operation during a circuit breaking operation.

Abstract: A sealed receptacle includes a case, a cylindrical member, and a closure plate. The sealed receptacle is configured to house a fixed contact, a movable contact, and an arc protection member. The arc protection member includes a peripheral wall, and a bottom. The peripheral wall is configured to conceal a junction between the case and the cylindrical member from the fixed contact and the movable contact. The bottom is interposed between the movable contact and the closure plate. The sealed receptacle houses a contact pressure provision member configured to bias the movable contact to come into contact with the fixed contact. The contact pressure provision member is interposed between the movable contact and the bottom so as to come into resilient contact with both the movable contact and the bottom irrespective of a position of the movable contact.

Abstract: A circuit breaker of different interruption speeds, and a spring operation mechanism is standardized for designing and manufacturing the circuit breaker. The circuit breaker has a power transmission mechanism for driving a movable contact 63 and a fixed contact 64 and an interruption spring 26 that imparts a driving force to separate the contacts through the power transmission mechanism. A latch mechanism restricts movement of the power transmission mechanism, and a pull-out operation section releases the restriction of the power transmission mechanism by the latch mechanism. The pull-out operation section is arranged to oppose a first arm of a lever to rotate the first arm. The lever is arranged so that a tip of a second arm is able to engage with and rest on the latch mechanism, and release the restriction of the power transmission mechanism by the latch mechanism.

Abstract: An overvoltage arrester includes at least two electrodes and a melt element that connects one of the electrodes to an outer terminal of the overvoltage arrester. An extinguishing device is designed to extinguish an electric arc.

Abstract: Disclosed is a magnetic drive for an electrical switch, including a linear armature (26) displaceable between two ends positions, a shunt body (27) mounted at a distance from said armature and means (24, 25, 30, 31) for generating a magnetic field. The magnetic field exerts a force on the armature (26) retaining the latter in the end positions. By joining the shunt body (27) with the armature (26), the course of the flow lines of the magnetic field are changed in such a way that the retaining force exerted on the armature (26) is reduced and the latter is displaced to the other end position, optionally by a force exerted externally on the armature (26), and retained in the position by the magnetic field. Disconnection is effected by the shunt body (27), were after being joined with the shunt body (27) the armature (26) is moved from the end position opposite the shunt body (27) to the end position facing the shunt body (26).

Abstract: A vacuum circuit interrupter having a pole unit structure and an operating mechanism structured to move the vacuum circuit interrupter contacts between a first, closed position, wherein a movable contact is coupled to, and in electrical communication with, a fixed contact, and a second, open position wherein the movable contact is spaced from, and not in electrical communication with, the fixed contact, as well as being structured to rotate a housing assembly rotatable portion between a first position, wherein a rotatable terminal is coupled to, and in electrical communication with, a line terminal, and a second position, wherein the rotatable terminal is coupled to, and in electrical communication with, a grounded terminal.

Abstract: The invention relates to an interrupter arrangement (1) having a switching tube (3) comprising a switch gas outlet opening (5). The switching tube (3) is connected to a coupling section (9) of a drive rod (10) in the region of the switch gas outlet opening (5). The coupling section (9) is protected from switch gasses emitted from the switch gas outlet opening (5) by means of a shield (15).

Abstract: An arc member is provided for an electrical switching apparatus. The electrical switching apparatus includes an operating mechanism for opening and closing separable contacts, and an arc chute disposed proximate the separable contacts to attract an arc generated thereby. The separable contacts include a stationary contact and a movable contact. The stationary contact has an edge, which is disposed in a plane. The arc member includes an arc element disposed between the stationary contact and the arc chute. The arc element has first and second portions and first and second arc attractors. The first arc attractor extends outwardly from the first portion toward the plane of the edge of the stationary contact to draw the arc from the separable contacts to the arc member. The second arc attractors, which are disposed on the second portion of the arc element, direct the arc into the arc chute.

Abstract: A switchgear apparatus is provided in which an impact induced by a close operation is mitigated, featuring space saving and high reliability with low costs. The switchgear apparatus includes a switching unit 3 that is composed of a fixed electrode 1 and a movable electrode 2; a movable shaft 4 that is extended from the movable electrode 2; an operating mechanism 5 that produces driving force and transfers the driving force to the movable shaft 4; a switching-unit holder 6 that holds the switching unit 3 and the movable shaft 4 thereinside; and a holder supporting unit 7 that has a fixing plane so as to fix the switching-unit holder 6 thereonto. The switchgear apparatus is arranged in such a manner that the holder supporting unit 7 serving as the fixing plane is constituted of a plurality of plates layered in the axial direction along the movable shaft 4.

Abstract: Switchgear having a vacuum-insulated switchgear 2 comprising switches having at least breaking and disconnecting functions, each placed in a unit, and solid-insulated bus bars 12 for electrically connecting the switches in each unit; an air-insulated switchgear 1 comprising switches having at least breaking and disconnecting functions, each placed in a unit, and air-insulated bus bars for electrically connecting the switches in each unit; and_the vacuum-insulated switchgear 2 and the air-insulated switchgear 1 are installed side-by-side, wherein the vacuum-insulated switchgear 2 and the air-insulated switchgear 1 are electrically connected through flexible conductors 17 which are provided between the solid-insulated bus bars 12 and the air-insulated bus bars.

Abstract: A power switchgear includes a circuit breaker including a container filled with an insulating gas, a stationary contact arranged in the container, and a movable contact that makes a movement to make contact with the stationary contact; an operation unit including a biasing member, and opens and closes the circuit breaker; and a linkage unit that transmits an biasing force of the biasing member to the circuit breaker. The linkage unit includes a rotary shaft, a lever including an engaging hole to be engaged with an outer periphery of the rotary shaft, and a pressing member that presses the rotary shaft onto an inner periphery of the engaging hole.

Abstract: A vacuum insulated switchgear comprising a vacuum container accommodating at least a pair of movable contacts and a pair of fixed contacts, wherein the movable contacts are capable of taking three positions, the switchgear being a double-break three-position type switch having breaking and disconnecting functions.

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: In order to reduce the breaking energy of a high-voltage or medium-voltage circuit-breaker, the interrupting chamber (10) contains two contacts (12, 14) mounted to move in opposite directions, actuated via a single device (20, 30). The two contacts (12, 14) are driven in opposite directions by a cylindrical cam (22) having slots (26, 28) that co-operate with fixed rods (32, 42), each of which is connected to a respective one of the contacts (12, 14): the profiles of the slots (26, 28) make it possible to manage the speed and the amplitude of the movement of the second contact (14) relative to the main contact (12) without requiring any complex design.

Abstract: A switchgear operating mechanism for reciprocatively driving a movable contact of a switchgear so as to shift the switchgear between an open state and a closed state. In the closed state, a roller pushes a leading end of a latch in the direction substantially toward the rotation center of the latch. In a state where the switchgear operating state is shifted from the closed state to the open state, a lock lever is pulled so as to allow the latch to be rotated in the opposite direction to the biasing direction of a latch return spring to release an engagement between the roller and the leading end of the latch, which causes the opening spring to discharge its energy to rotate the sub-shaft.

Abstract: A gas insulating switchgear equipped with a grounding switchgear of the invention includes a sealing vessel that fills an insulation gas, a main circuit-switching fixed electrode that is fixed to the sealing vessel, a movable electrode that comes in contact with the main circuit-switching fixed electrode, a grounding-switching fixed electrode capable of conducting current, and a driving device that drives the movable electrode, thereby driving the movable electrode. The main circuit-switching fixed electrode and the grounding-switching fixed electrode are linearly arranged in a longitudinal direction of the movable electrode, and the driving device drives linearly the movable electrode to three positions of a closed-circuit position, an open-circuit position, and a grounding position, and holds the movable electrode.

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: The time period is shortened till a cutoff spring force is released when a switchgear is cut off. This switchgear comprises: a closing shaft; a main lever fixed turnably on the closing shaft and associated with a movable contact; a closing spring; a sub shaft; a sub lever and a latch lever fixed on the sub shaft; a roller mounted on the leading end of the latch lever; a turnable latch and a kick lever; a lock lever made turnable with respect to the latch; a latch returning spring for biasing the latch; a lock returning spring for biasing the kick lever and the lock lever; and a stopper for restricting the turns of the lock lever and the latch.

Abstract: This invention relates to the control of a switch apparatus having two interrupters, such as a busbar disconnector and a grounding disconnector. The invention provides: a rotary control shaft arranged away from, and at right angles to, the planes of straight line motion of the movable contacts; at least one disk cam fastened to the control shaft and having two distinct internal cam grooves; and two pairs of levers hinged to each other, with one of the levers of a given pair having one end hinged at a fixed point while its other end is hinged to the other lever of the same given pair, which is itself hinged to one of the movable contacts, a spigot being located between the two ends of each of the levers that has one end hinged at a fixed point, the spigot being engaged in one of the cam grooves so as to constitute a cam follower. The mechanism of the invention enables there to be an additional actuating ratio between the disk cam or cams and each associated movable contact.

Abstract: A switchgear is provided with interlocks that enhances safety and reliability. On a front face panel, a single line connection diagram, an indicator showing state of ON, OFF and disconnection, another indicator showing a state of an grounding switch, a selection mechanism for selecting manipulation of circuit break, disconnection and grounding, push button switches and for closing and opening a circuit breaker, a manipulation handle insertion hole for disconnecting and a manipulation handle insertion hole for grounding are provided. Depending on positions of a manipulation pin 12 of the selection mechanism, a machine and apparatus to be manipulated is selected.

Abstract: A stored energy assembly is provided for an electrical switching apparatus, such as a circuit breaker. The stored energy assembly includes a mount removably coupled to the circuit breaker housing. A stored energy mechanism, such as a spring, is coupled to the mount and is movable among charged and discharged positions. An actuating element is cooperable with the gears of a gear assembly in order to move among first and second positions corresponding to the spring being disposed in the charged and discharged positions, respectively. A manual charging mechanism and an automatic charging mechanism are coupled to the gear assembly, and move the gears, in order to move the actuating element and charge the spring. The spring, the actuating element, the gear assembly, and the charging mechanisms are coupled to the mount, thereby forming a sub-assembly. The sub-assembly is removeably coupled to the circuit breaker housing.

Abstract: A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.

Abstract: A vacuum insulated switchgear comprising a case having a switch section, a bus-bar section and a cable section, each being partitioned by an earthed metal plate, a vacuum double break three point switch disposed in the switch section and having breaking and disconnecting function, an operator, a bus-bar disposed in the bus-bar section of the case, and a cable connection terminal connected to a cable in the cable section.

Abstract: A motor operator for switchgear for use in mains power distribution systems comprising a closed cabinet (5) with an operating shaft (53) protruding there from said operating shaft being rotatable at least between two positions and has a coupling part (2). The motor operator (6,7) comprises a housing mountable on the external surface of the switchgear cabinet. A rotatable connection shaft (51) is connected to an electric motor via a drive mechanism, and has a first coupling part (52) to fit with the coupling part (2) of the switchgear in a non-rotational interlocking manner, and further has a second coupling part (54) extending from the housing to operate the contact of the switch manually and, for which purpose, the motor operator has a release mechanism releasing the connection shaft. The motor and the drive mechanism is designed as an electro-mechanical actuator with a rear mounting (23) for mounting the actuator in the housing of the motor operator and ?.

Abstract: Magnetically latching and releasing a voice coil actuator for controlling electrical switchgear. The voice coil actuator includes a voice coil magnet disposed on a common longitudinal axis with respect to a voice coil assembly. A coil of the voice coil assembly exerts a magnetic force on the voice coil assembly, thrusting the voice coil assembly towards the voice coil magnet. At least one pair of latching members mounted to the voice coil assembly creates a permanent magnet circuit between the latching members and the voice coil magnet. The permanent magnet circuit maintains the position of the voice coil assembly relative to the voice coil magnet, even when power to the coil is removed. This latch can be released by applying a current in the coil or by applying an external, physical force to a member coupled to the voice coil assembly.

Abstract: The disclosure relates to a contact drive arrangement for the movement of at least one contact in high-voltage switchgear systems having a contact drive and having an auxiliary switch, which has at least two auxiliary contacts. The contact drive works together with the at least one contact and with a first auxiliary contact. Furthermore, a delay drive is connected functionally in parallel with the contact drive, and the delay drive works together with a second auxiliary contact. The first and second auxiliary contact are electrically connected in series. In addition, the delay drive has a damping element, and by means of the damping element the time for a switching operation is extended in comparison with the time for a switching operation with the contact drive.

Abstract: A high-voltage disconnecting circuit breaker includes a first and a second contact, a mechanism provided for moving the contacts to a first mutual distance, and a mechanism provided for quenching any arc appearing between the contacts during the movement to thereby provide the functionality of a high-voltage circuit breaker, wherein the mechanism provided for moving is further provided for moving the contacts to a second mutual distance larger than the first mutual distance after quenching of any arc to thereby provide the voltage withstand functionality of a high-voltage disconnector.

Abstract: A fast acting switching mechanism for a circuit breaker includes a drive rod articulated to a drive module and supporting at an end thereof a contact bridge having at opposite ends thereof respective moveable contacts for switchably engaging a pair of fixed contacts of the circuit breaker. A contact spring unit is operatively coupled to the drive module for applying closing pressure in the order of 200 Kg; and a latch latches the drive rod in an open or closed position after operation of the circuit breaker and prevents rebounds. The contact bridge includes a pair of side conductors supporting on upper edges thereof an armature having an exposed upper surface that supports the moveable contacts at opposite ends of the armature; and a reinforcing element inserted between the side conductors.