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Vacuum switch comprises a steel base with vertical ribs and horizontal racks on which at least two identical phase modules divided by vertical ribs are installed in the upper and middle part of the casing. In the lower part of the casing there are blocking and synchronising shafts common for all modules and at least one deflecting electromagnet. The blocking shaft is connected to the shaft of the deflecting electromagnet and is fitted by a lever to which one spring end is attached. The second end of the spring is fixed on the base. Each of the phase modules comprises the following units installed in the upper casing part: a vacuum chamber with a stationary contact and a movable contact, current leads, supporting and traction insulators set vertically along the central axis of the module, a rod, an opening spring and a loading spring mounted coaxial to the rod, and a separate-phase linear electromagnetic drive mounted in the middle part of the casing. A drive armature is placed in the inner cavity of a stator and is fixed on the rod. The stator is fitted by an axial vertical slot. A fixing pin fixed on the rod is set in the slot and is able of moving. Each rod is coupled to the traction insulator by its upper end. The lower end of the rod is equipped by a rolling bearing and rests against an eccentric installed on the common blocking shaft. Rods of all phase modules are fitted by linear gear rims made so that to be able of engagement with the gears installed on the common synchronising shaft. |
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Three-stage method of electrical switching Electrical switching is made by a vacuum circuit-breaker by means of three-stage contact breaking of the vacuum circuit-breaker. The maximum contact breaking rate is set for the first stage, at the second stage the breaking rate is decreased by at least five times and at the third stage the contact breaking rate is increased by at least twice. Duration of the first stage is set to 5-6 ms, duration of the second stage is set to 10-12 ms, and the third stage lasts till completion of the contacts travel. |
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Feed line circuit breaker with vacuum switching chamber Circuit-breaker includes a parallel branch (4) with coupled vacuum chamber (6) for current switching. The branch does not function in normal conditions, at that current passes through it only when the circuit-breaker (2) starts its breaking action due to increase of current transfer from the main power line (1) to the branch (4). Thus the vacuum switching chamber (6) remains at rest in normal operating conditions. |
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Vacuum circuit breaker with terminal clamps rigidly fixed to buses at both sides Vacuum circuit breaker contains a vacuum chamber (2) with a switch contact consisting of a fixed contact element that is in contact with a terminal clamp (11) of the fixed contact, as well as a movable contact element and a drive unit (7). A switching mechanism (4) is connected to a drive unit (7) and the movable contact element. Connective means in contact position connect electrically a terminal clamp (13) of the movable contact with the movable contact element. The connective means have a screw terminal (16, 17) consisting of an input screw terminal element (16) connected to an electroconductive section of the switching mechanism (4) and the matching screw terminal element (17) connected rigidly to the vacuum chamber (2) and electrically to the terminal clamp (13), which are located so that the input screw terminal element (16) in result of a driven motion is clamped with the electroconductive section by the matching screw terminal element (17). |
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Invention relates to a vacuum switching lamp (1) with a body, which has two sections (16, 17) of the body from insulating material that are placed and made symmetrically relative to the middle plane (S). Each of both sections (16, 17) of the body from insulating material includes several parts (9, 10, 11, 12, 13, 14) of the body from insulating material. A part (9, 12) of the body from insulating material of each section of the body from insulating material placed most distantly from the middle plane (S), has length (L1), which is more than the length (L2, L3) of other parts (10, 11, 13, 14) of the body from insulating material. |
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Contact for vacuum interrupter Contact for a vacuum interrupter includes many cutouts passing to outer peripheral surface from many positions distanced relatively from the centre of contact surface; lug formed between a pair of adjacent cut-outs so that to minimise mechanical fragility of the part with small width in the lug inducing arc rotation. Each part of cut-out contains the following: the first end part closed and adjacent to the centre; the second end part open and adjacent to outer peripheral surface; the first part of cut-out passing linear from the first end part; and the second part of cut-out passing linear to the second end part bending from the first part of cut-out at the specified angle which is larger or equal to 30 degrees and is smaller or equal to 60 degrees. Distance from the first peripheral surface of the central recessed part of contact to the first part of cut-out is equal to the specified first distance which is more than zero and less or equal to 5 mm. |
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Vacuum interrupter for vacuum circuit breaker Attracting element is provided, made from ferromagnetic material, to form a space between a fixed electrode and a movable electrode to attract a radial magnetic field generated in radial direction between a fixed electrode and a movable electrode by means of an attracting element. On the outer circumferential surface of the isolated container there is a support groove formed in a stepwise manner to support an attracting element inserted in it, in the axial direction, which is a direction for movement of a movable electrode. Height of the attracting element in the axial direction is not less than the maximum distance between the fixed electrode and the mobile electrode. At the same time a component of the radial magnetic field in a common horizontal direction between a fixed electrode and a mobile electrode may be increased. |
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Direct action drive motor is designed to turn a vacuum switch on and off. The drive has an electric motor which, directly or through a reducing gear, rotates a cam in form of a disc which has areas with a narrow and high profile, as well as a disconnection spring, a mechanical latch and a lever mechanism, the levers of which are connected to movable contacts of vacuum arc-quenching chambers and with the disconnection spring, and which performs swinging movements between on and off positions. One of the levers is attached to a roller on which the cam presses with an area with a high profile during its rotation and when performing the turn-on operation. The lever mechanism can be held in an on position by the mechanical latch. The turn-on operation involves coiling the disconnection spring and the turn-off operation occurs upon triggering the mechanical latch and turning the lever mechanism under the action of the recoiled disconnection spring in the off position. The lateral surface of the cam has a protrusion, and the lever mechanism has an additional arm which, during rotation in the on position, interacts with the protrusion and stops rotation of the cam in a position when its area with a narrow profile lies opposite the roller. |
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Method for training of contact gap for vacuum circuit breakers by high voltage Training method is implemented by direct-current high voltage feeding to complete gap between contacts in stages starting from 0.3-0.5 of rated operating voltage. Simultaneously permanent magnet field is created along direction of the gap and its intensity value is increased smoothly from zero up to prebreakdown current moment of about 0.6-0.8 of breakdown current at test voltage. The gap is hold at set voltage equal to 2-3 times of prebreakdown current measured at the beginning till drop, at the first training stage. Magnet field intensity is decreased up to zero and the next stage of training voltage is set. Value of field intensity is increased again from zero up to prebreakdown current available at the first stage. The above cycle is repeated at the next stages. At the last stage training voltage is set as 1.2-1.5 times bigger than testing voltage. The process is repeated at reverse polarity of high voltage applied to the gap and reverse direction of permanent magnet field. |
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Flexible shunt for vacuum circuit breaker Flexible shunt is designed to provide a pathway between movable electrode segment and terminal of the main circuit in vacuum circuit breaker. Flexible shunt contains a pair of conductive plates. Each plate contains the following: connecting area of clamp configured as a flat conductive element connected to clamp; connecting area of terminal segment configured as a flat conductive element connected to terminal segment; flexible arched area capable to connect connecting area of clamp to connecting area of terminal segment. Flexible arched area is configured in the medium part of each conductive plate so that it can protrude outside before installation of a flexible shunt in vacuum circuit breaker. |
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Medium voltage switchgear cell Medium voltage switchgear cell is made so that it can be installed between two parts of electric circuit in order to implement at least functions of current passing between these parts, current interruption between these parts, circuit decoupling and grounding. The cell contains switch (or automatic circuit breaker) (1) with vacuum breaking technology which also performs a function of disconnecting switch and selector (2) connected in-series to switch (or automatic circuit breaker) (1). Selector (2) has at least two positions respectively: current flow position and grounding position for one of circuit parts. Switch (or automatic circuit breaker) (1) is connected electrically from line side to bus and from load side to selector (2), which is connected electrically from load side with at least one cable or bus. The cell can be in three positions: closed, open and grounded positions respectively. |
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Vacuum dead-tank circuit breaker Vacuum dead-tank circuit-breaker contains at least one gas-filled tank with a hollow insulator inside thus forming a sealed chamber and vacuum arc-quenching chamber (VAQC) consisting of insulator with two flanges, at that one flange is connected hermetically to the first flange of the hollow insulator. Inside VAQC insulator there are moving and fixed contacts and bellows connected hermetically to the flange of VAQC insulator; insulation traction is connected to the moving contact; it passes through VAQC bellows and moving unit of the hollow insulator. At that the second flange of the hollow insulator is connected hermetically to gas-filled tank of the circuit-breaker. |
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Check method of vacuum circuit breaker of traction current rectifier functioning Invention relates to check method of functioning of vacuum circuit breaker (12) of traction rectifier with at least one four-quadrant actuator (2) of network side and pulsed rectifier (4) of load side, which are electrically connected in parallel via capacitor (CZK) of intermediate loop on the side of steady voltage; and with traction transformer (10) with at least one secondary winding (8), which outlets are connected to outlets (16, 18) of alternating voltage side of actuator (2), and which primary winding has possibility of connection to circuit alternating voltage (u N) via vacuum circuit breaker (12). When circuit breaker (12) is opened, actuator (2) is controlled exactly when circuit alternating voltage (u N) is located in time relative to input voltage (u St) of actuator, so that differential voltage (Δu), determined between circuit alternating voltage (u N) and input voltage (u St) of actuator, complies with predetermined test voltage by amplitude. Then it is checked whether current flows from supply mains to actuator (2). |
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Terminals for vacuum circuit breaker and vacuum circuit breaker with such terminals Terminals for vacuum circuit breaker include: the first terminal with lots of support rings, lots of pin contactors and ring-shaped springs installed with possibility of contact with outer circumferential surface of pin contactors, so as to provide pin contactors with elastic force; the second terminal with outer diameter larger than inner diameter of the first terminal formed by inner circumferential surface of pin contactors of the first terminal and configured by electrical conductor of sleeve type; and insulating guide element fixed with possibility of detachment on leading end of the second terminal, so that electrical-insulating property of the second terminal increases when the first and the second terminals are disconnected from each other, it has electrical-insulating property and narrows, so as to have reduced outer diameter when distance from the second terminal increases. |
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Method of making contacts of vacuum arc-quenching chambers Powdered mixture and a workpiece of a high-electroconductivity material are placed in a vacuum chamber, where the powdered mixture is deposited in form of a coat on the workpiece by electron-beam deposit welding in a vacuum. Further electron-beam remelting of the entire volume of the fused coating is carried out in a single process cycle with deposit welding. |
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Insulation of vacuum cartridge type commutation device by way of slush moulding Vacuum cartridge contains a commutation device (1) having a tightly sealed chamber (2) passing along the longitudinal axis (AA) wherein two contact (10) are placed movable relative each other along the axis (AA), the chamber housing (2) containing a tubular part (4) opened at the end and two conductive covers (6) strongly attached to the tubular part (4) by means of the connective area (8). The chamber housing (2) is made of elastomer insulating shell (22). The two conductive covering plates (26) surround the chamber (2) covers (61, 62), sealing them together with the ceramic tube (4). Each of the covering plates (26) contains a base wall and a peripheral side wall passing along the axis (AA) so that the connective area (8) and the tubular part end (4) are positioned within a covering plate (26). The boundaries of connection between the elastomer shell (22) and the housing tubular part (4) are accordingly tightly sealed with the covering plates. |
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Mv and hv distributor gear contact unit and its fabrication method According to the invention, a cylindrical-shaped thermoconductive heat-transfer element is used in the contact unit of a LV, MV or HV distributor switchgear which element is installed between the vacuum interrupter chamber, the contact base and the encapsulating shell. The inner surface of the heat-transfer element is positioned on or near the outer surface of the vacuum interrupter chamber and the contact base while the outr surface rests on the inner surface of the encapsulating shell. The heat-transfer element may be fabricated of a thermoconductive plastic by way of pressure casting, casting or moulding. Then it may be connected to the pole part through the holes. The next operation is installation of the heat-transfer element before the unit encapsulation with an encapsulating compound with their subsequent joint filling. |
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High-voltage vacuum circuit breaker Invention relates to high-voltage vacuum circuit breakers, in which an electromagnet control system of neutral type is used, and in a high-voltage vacuum circuit breaker, movable contacts fixed via an insulator on electromagnet anchors are arranged as rigid, and contacts fixed on high-voltage bushings are arranged as elastic in the form of thin plates. In parallel to elastic contacts there are rigid plates installed in the form of thin plates on high-voltage bushings at the side of movable rigid contacts. Besides, movable rigid contacts are arranged as composite, namely, their first (contacting) part is made of a non-magnet material with low disposition towards diffusion welding in high vacuum, for instance, from molybdenum or tungsten, and their second part is made of a material having high heat conductivity, for instance, from copper, and is installed inside the body of the first part of movable contacts by more than a half of its thickness. |
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Vacuum circuit breaker contains housing divided by high-voltage insulator forming arc-extinguishing chamber with axial movable and fixed electrodes. Movable electrode is attached to housing by current lead and metal corrugation separating chamber vacuum environment from ambient environment, fixed electrode is attached by its current lead to housing of arc-extinguishing chamber via separating insulator. Electrodes are provided with annular contacts. Electrodes are designed as disks made from nonmagnetic material with slots in the form of Archimedean spiral, at that angles of spiral radius rotation have reverse direction, fixed electrode has spiral radius rotation φ>0 and movable electrode has spiral radius rotation φ<0.3. |
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Contact system of vacuum arc-quenching chamber for voltage of 100 kv Contact system of a vacuum arc-quenching chamber comprises mobile and fixed contact units, every of which consists of a current contact jaw in the form of a rod, a contact part with a flat surface of contact, an inductor in the form of a split ring from a material with high electric conductivity and a bushing from a material with low electric conductivity. The inductor and the bushing are arranged between the contact part and the current contact jaw and are connected with them. The bushing is installed inside the inductor and coaxially with it. The contact part is shaped as a cup turned upside down with a side cylindrical surface covering the inductor in the form of the split ring. A transition between the flat surface of contact and the side cylindrical surface is arranged with a radius of rounding of at least 5 mm. As a result at edges of the contact part and ring inductor there is no high intensity of electric field, which reduces or eliminates probability of vacuum gap breakthrough between opened contacts. Besides, vacuum breaker design will also become more compact and less material-intensive. |
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Vacuum circuit breaker includes housing separated with high-voltage insulator, thus forming arc-extinguishing chamber with axial movable and fixed electrodes. Movable electrode is attached to housing by means of current lead and metal corrugation that separates vacuum medium of the chamber from environment. Movable and fixed electrodes are equipped with annular contacts in which equal radial slots which are uniformly located in circumferential direction are made on the side of their being attached to the corresponding electrodes. In slots of annular contacts there inserted are U-shaped constant magnets which are symmetrical relative to contact surface of contact connection and connected to each other which the circuit breaker is on. Polarity of poles of magnets which are located opposite each other on movable and fixed annular contacts is the same. |
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Contact device for vacuum arc-quenching chamber Contact device for vacuum arc-quenching chamber contains moving and fixed switching contacts each one of which consists of arc-resistant contact pad connected with projection of disk base, herewith, base projection is made as spatial segment, and base and pad are enveloped by collar jointing the disk with projection and arc-resistant contact pad by this providing rigidity of switching contact. |
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Method for manufacturing contact part of medium-voltage switching device and contact part Vacuum chamber is encapsulated together with moulding core which is attached to it on its lower cover. Before encapsulation, on outer circumferential line of vacuum interruption chamber cover or close to it, compensation ring is accommodated as separate die cast-moulded seal between lower cover of interruption vacuum chamber and moulding core, and then also encapsulated so that it stays as residual seal in sheath. Then, moulding core is removed. |
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Pole part of medium voltage switching device Invention relates to pole part of switching device with vacuum interrupter chamber enclosed into insulation material and containing fixed and moving contacts. Herewith, cast insulating housing is open in lower part in the area of moving contact or drive rod actuating moving contact. In the area of moving contact or at the place where it is coupled with drive rod (3), at least one vent hole (7) is made which passes through the wall of insulation (2), boundary zone between insulation and electric coupling part or through electric coupling part (4) of moving contact. The vent hole (7) is formed in coupling part (4) by means of at least one through bleed screw (8) with the help of which external contact is fixed in coupling part, at the same time, a hole accommodating at least one such bleed screw is through and connects external and internal areas of pole part to be ventilated. |
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Device for switching of electric circuits Device comprises vacuum arc-quenching chambers and an electromagnetic drive, a movable anchor of which is fixedly connected to a level, which is mechanically connected to movable contacts of arc-quenching chambers so that whenever contacts of the first arc-quenching chamber are open, contacts of the second arc-quenching chamber are closed, and vice versa, when contacts of the first arc-quenching chamber are closed, contacts of the second arc-quenching chamber are open. Fixed contacts of each pair of arc-quenching chambers are fixed on current-carrying buses at different sides of an insulation panel. Movable contacts of vacuum arc-quenching chambers are mechanically connected with a lever of a drive as capable of their displacement relative to the lever towards the side of closing with fixed contacts in the connected position of the electromagnet. All simultaneously connected movable contacts are electrically connected with one current-carrying bus with a terminal, which is connected with one phase of a power supply source, and all simultaneously open movable contacts are connected with the second current-carrying bus with a terminal, which is connected with the second phase of the power supply source. At the same time the insulation panel is mechanically connected to the base, where a drive electromagnet is fixed. |
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Synchronous vacuum switching device Switching device has vacuum arc-quenching chambers (VAQC), controlled electromagnet single-phase drives with feedback sensors for each VAQC, block contacts for each drive, a shaft of manual disconnection, a device of electromagnetic drives control, two voltage sensors and one current sensor at each pole of the device, a unit of external synchronisation, which, when a command arrives to disconnect or connect from the external device, does identification of a load type, current mode of its operation and type of planned switching, defines moments of switching, sequence of poles switching and dynamics of contacts movement, forms and supplies control signals with the required warning and accounting of the predicted time of response. |
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Method consists in insertion of extender (26, 27, 19, 20, 21) between the above element (6, 7, 11, 12, 13) and the above part (8, 9, 1, 3). The above extender is capable of applying forces to the element and the above part in order to position the element in relation to the above part and/or fix the above element in place in relation to the above part by means of friction, on one side, between extender (26, 27, 19, 20, 21) and element (6, 7, 11, 12, 13) and on the other side, between extender and the above part, and in order to provide the positioning and/or attachment of the above element in relation to the above part till it is fully attached, and in order to perform the above final attachment by performing two welding operations respectively between the above element (6, 7, 11, 12, 13) and extender (26, 27, 19, 20, 21), and between extender and the above part. |
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Switching device with vacuum arc-extinguishing chamber Invention refers to switching device with vacuum arc-extinguishing chamber in which at least one movable contact element is located; two in-series connected contact devices with two opened contact planes are located inside vacuum arc-extinguishing chamber; contact element moving together with the first contact element is enveloped with bowl-shaped device which is a part of contact element or rigidly connected to it or equipped with a hole through which the contact element having active contact surfaces on both sides passes. Both contacts have the possibility of being actuated with one common actuator. |
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Vacuum circuit breaker includes housing, vacuum chamber, insulating rod, magnetic shell-type system with winding and sleeve with flat surface facing inside magnetic system, and armature located inside magnetic system with end flat surface facing the sleeve. Sleeve is made from magnetic-susceptible material with possibility of being moved along direction of armature movement. When armature approaches the sleeve and stop in the device, which is located outside magnetic system, sleeve moves towards armature by closing magnetic circuit and increasing the force of magnetic mechanical drive. |
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Vacuum switch and method of switching Drive system additionally comprises main spring, which moves shift linkage from open position into switching position, drive for pre-loading of main spring, locking mechanism to lock main spring in pre-loaded condition and hinge latch configured for movement in longitudinal direction, at least, in position, in which its rotation is locked, so that shift linkage can be released by latch when moving from open position into switching position and locked in switching position. Additionally, shift linkage can be released in latch position, in which it is unlocked for rotation by means of latch rotation for movement from switching position into open position. |
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In vacuum circuit breaker containing at least one vacuum arc-extinguishing chamber, two insulating pipes from composite material, on outer surfaces of which there are ribs from organic-silicon material, and metal flange coaxially attaching the above pipes, the above insulating pipes have equal outer diametres, and metal flange in the centre of outer cylindrical surface is equipped with annular projection. At that, insulating pipes are installed on outer cylindrical surface of metal flange as far as they will go in the above annular projection. |
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Vacuum circuit breaker includes frame, common shaft with levers and insulating rods, phases installed on the frame and having the first and the second current leads fixed on insulators, vacuum arc-extinguishing chamber with spring opening mechanism of its movable contact and flexible conductor connected to it, disconnecting switch having movable and fixed contacts and creating insulating disconnection in series with open contacts of vacuum chamber; at that, fixed contact of disconnecting switch is fixed on the first current lead. On the frame there installed is shaft with earthing blades, and in each phase of the second current lead there fixed is bracket with axis, and with possibility of rotation around this axis, cam with lever and two insulating plates between which vacuum chamber with spring opening mechanism and movable contact of disconnecting switch, which is electrically connected to fixed contact of chamber, is fixed. Flexible conductor from movable contact of chamber is electrically connected to the second current lead. Spring opening mechanism of contacts is provided with roller contacting the cam the arm of which is connected to insulating rod with levers of circuit breaker shaft. Insulating plates are connected with additional insulating rods with earthing blades. |
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Invention may be used as a component of other electric equipment, drawer cubicles of switching devices, magnetic stations, including explosion-proof ones. Vacuum contactor comprises body, vacuum arc-quenching chambers, traction insulators, electromagnetic drive of direct action with connected freely installed pushers of connection/pressing, disconnecting rods and anchor. Anchor is fixed on disconnecting stems by means of nuts. Contactor is arranged with the possibility to locate flexible and rigid current-conducting buses at any side of body, and also to input sensors, for instance, current ones - "Rogovskiy's belt", which are installed on current-conducting parts and are poured with dielectric compound. Heat sink is done through current-conducting buses. |
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One drive - "on" - acts at common traction rod to the side directed to close contracts of vacuum arc-quenching chambers, and other drive - "off" - acts at common traction rod to the side directed to open contacts of vacuum arc-quenching chambers. At the moment of vacuum circuit breaker actuation, electromagnet drive (on or off) force acts at common traction rod, which may be quite high so that pulse current of actuation may be sent through according winding with a quite high value without risk of winding heating. High value of force as electromagnet drive actuates results in high value of mechanical acceleration of movable parts, causing less time of vacuum circuit breaker connection and disconnection. Unavailability of counteracting springs when using separate drives increases value of mechanical force applied as breaker actuates at mechanical movable system, which reduces time of mechanical movement of movable parts of mechanism and improves speed characteristics of vacuum circuit breaker as a whole. |
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Vacuum arc-quenching chamber for low voltage switching installations Invention relates to vacuum arc-quenching chamber for medium voltage switching plant with one or several ceramic cylindrical tubular sections, closed with metal covers both on side of fixed contact and on side of switching contact, in which, at least one of covers inside and/or outside is equipped with insert, increasing overall thickness of external cover wall, or with external ring, accordingly inserted into cover or applied onto cover, at least partially with geometric closure. According to the invention, the insert dimensions are selected and inserted so that it leaves a small gap to support edge of ceramics so that in internal contact zone, in process of assembly, there might be a flanging of pressed element of central screen could be received. |
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Dielectric insulating gasket for vacuum tube Proposed gasket allows easy and simple assembly-disassembly of vacuum tube. Inner and outer contact surfaces of said gasket are smooth, each consisting of two cylindrical parts of different taper (31A, 31B and 32A, 32B). At least one of lateral surfaces comprises annular recess (35). Each gasket has inner and outer contact surfaces. Invention allows ruling out partial electric discharge, on the one side, between the case inner contact surface and gasket outer contact surface, and, on the other side, between vacuum tube outer surface and gasket inner surface. Inner and outer contact surfaces are cylindrical or tapered with respect to gasket axis. Each lateral surface consists of convex and concave parts. Lateral surfaces consists of two different-inclination parts. Gasket cross section features square shape. |
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"breaking" lever fixture is composed of supports positioned on the arm ends adjoining the central hinge. Presence of the supports at the specified location enable fixation of the "breaking" lever in the apart position without additional fixture mechanisms. The vacuum switch may contain an electromagnetic pusher. The electromagnetic pusher may operate either jointly with the common shaft drive or individually. In case of individual application of the electromagnetic pusher it may act as the common shaft drive. The vacuum switch may additionally contain a tripping mechanism impacting on the hinge area towards intersection of the axis of the central hinge of the line connecting the hinge connected to the body and the hinge connected to the common shaft. When the said force is applied to the hinge area the central hinge passes the point of maximum distance between the utmost hinges; having passed it becomes folded under the shaft impact. The tripping mechanism drive may be of electrical, mechanical or combined type. |
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Installation method for vacuum circuit breakers In the process of circuit breaker installation, when time-optimal by bounce contact pressing is set the stability of circuit closing and/or opening by moving contact is checked. This check is performed by means of feeding voltage pulses to control winding. The pulses will be 2.5-3 longer than vacuum circuit-breaker actuation time and their total number will be 1 to 10% of commutation guaranteed number during field operation depending on circuit breaker type. In this process, after the time period that is 1.5-2 times longer than circuit breaker actuation time, the number of commutations is recorded that did not cause closing and/or opening of contacts circuit, and in their presence additional adjustment of bridge contact preload and the second check of contacts circuit closing and opening stability is performed. |
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Proposed switch comprises case separated by high-voltage insulator to make arc extinguish chamber with axial movable and fixed electrodes. Movable electrode is secured to said case by current lead and metal corrugation that separates chamber vacuum medium from ambient medium. Electrodes are furnished with circular contacts. Fixed circular contact has radial grooves arranged along the circumference to receive permanent "П"-like magnets to form magnetic system. Contact surface of circular contacts along electrodes axes are located on the level of magnet pole planes. Separating isolators are arranged between electrode and permanent magnets and between circular contact and permanent magnets. |
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Coats from heat-resistant material or heat-resistant metals consisting of nanoparticles are applied at least partially in the area of shield 4, 7 or other structural elements inside vacuum chamber. |
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Method for training of vacuum arc-quenching chambers of high voltage Invention relates to training of vacuum arc-quenching chambers of high voltage by pulse discharges of high voltage of various polarity after chamber tapping, which is performed as charge of not more than 10 microcoulomb for each of discharges passes through trained gap. |
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Self-adhesive elastomer layer in switch poles insulated with solid electric insulating material Invention relates to switch pole (1) insulated with solid electric insulating material with electrically non-conducting and shape-stable body (2) made of electric insulating material, where switching (arc-quenching) chamber (4) is installed, which comprises fixed contact part, and also movable contact-part arranged opposite to the latter at drive side and installed with the possibility of longitudinal motion. Body (2) at the drive side is open to allow for entrance of driving motion into movable contact part. Between switching (arc-quenching) chamber (4) and body (2) there is an elastic shock-absorbing gasket (10) installed. Elastic shock-absorbing gasket (10) has such characteristics of self-adhesiveness, that both with switching (arc-quenching) chamber (4) and with body (2) of electric insulation material there is a surface joint provided, which may be disconnected only abrasively. |
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Invention refers to interrupter pole (1) insulated with solid electric insulating material, which is intended for interrupting electric current, with steady as to shape and electrically non-conducting housing made from electric insulating material (2), in which there installed is arc blow-out chamber (5) with stationary unmovable contact piece and movable contact piece; with inlet connection part (3) electrically connected to unmovable contact piece and contacting from outside and outlet connection part (13) connected to movable contact piece by means of connecting movable contact piece (12). Outlet connection part (13) is rigidly connected to housing made from insulating material (2) and has contact surface contacted from outside. Housing made from electric insulating material (2) is equipped with hole for introducing drive movement to movable contact piece. Connection of moving contact piece (12) is fixed on outlet connection part (4) by means of connection device (17) acting on contact surface. |
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Vacuum switching unit contains insulating casing, arc-suppressing electrodes and screen system at least from five screens, part of which are isolated and two of near-flange are under electrode potential. Central and isolated screens are implemented in the form of solid of revolution, generatrix of which allows echelon form, additionally each of ends of screen of minor diametre is enveloped by end of major diametre of adjoining screen, and annular channels between adjoining screens in areas of reciprocal overlapping and annular slots between casing and screen fulfil conditions: L≥M; 4≤P/S≤15; where L - length of annular channel; M - width of annular channel; P - depth of annular slot; S - width of slot at the middle of slot depth. |
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Invention relates to LV and HV electrical hardware and can be used in remote control circuitry. Proposed contactor comprises, preferably, three vacuum arc-extinguishing chambers, electromagnet, casing, insulating lever with electromagnet armature, insulating lever axle, yoke, opening spring, lever stroke limiter and set of auxiliary contacts furnished with a push-button. In compliance with this invention, it is furnished with additional lever arranged on the housing to turn thereabout. Longer arm of additional lever interacts with insulating lever, while its shorter arm acts on auxiliary contact unit push-button. Ratio of auxiliary lever short arm-to-its long arm equals the ration of auxiliary contact set button-to-insulating lever stroke at the point of interaction with auxiliary lever. Auxiliary lever can have positive camber on the side of interaction with auxiliary contact set button. |
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Invention relates to LV and HV electrical hardware and can be used in remote control circuitry. Proposed contactor comprises, preferably, three vacuum arc-extinguishing chambers, electromagnet, casing, insulating lever with electromagnet armature, insulating lever axle, yoke, opening spring, lever stroke limiter and set of auxiliary contacts furnished with a push-button. In compliance with this invention, aforesaid opening spring is centered by two elements, one is furnished with a rod and the other one is provided with the hole mating aforesaid rod. The elements are arranged to displace the rod inside the hole. Sizes of the centering elements allow their telescopic folding at spring compression. One of the said elements thrusts on the yoke, the other one on the stop screwed in the lever. Note that face surfaces of centering elements and those the said elements rest on represent a sphere and a conical seat. |
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Invention relates to low-voltage and high-voltage electric devices and can be used in electric circuits for remote controlling electric actuators and networks. In the vacuum contactor essentially containing three vacuum arc-quenching chambers, an electromagnet, housing, insulating lever with an electromagnet armature, insulating lever pin, heelpiece, opening spring, lever arresting device and a unit of auxiliary contacts with a button, according to the invention, the housing has projections on sidewalls and the ends of the lever pin are mounted on these projections. One end of the lever pin is rigidly fixed in the projection of the sidewall of the housing. The insulating lever is integral and has anti-friction bushings, rigidly fixed in it by press-fitting. The insulating lever is mounted on an axis with possibility of rotation on these bushings. |
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Electromagnetic drive for vacuum circuit breaker Invention relates to electrical engineering, to electromagnetic drives of vacuum high-voltage circuit breakers. The electromagnetic drive is made from an imbricated core, actuating and tripping coils, armature and permanent magnets. The electromagnetic drive is provided with two magnetic latches, which hold the armature in its two extreme positions due to the effect of permanent magnets. The armature has frontal working gaps: one near the left end, and the other near the right end. The electromagnetic drive has several galvanically unconnected tripping coils with nominal power of not more than 0.33 kW each. Near one end in the zone of the tripping coil there two more lateral working gaps. Magnetic conductance of the lateral working gaps is several times more than magnetic conductance of the frontal working gap. |
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Invention belongs to the field of high currency energy impulse electrical energy technology. The exchange device consists of a vacuum chamber, with two wires inside, stationary and moving electrodes, each in contact with two, identical contact elements. Each contact element is electrically joined to the wire with the aid of the appropriate current contact jaw. Furthermore, each current contact comprises a braced, current distributor. Each braced, current distributor includes between the primary and secondary current distributor a vertical outer strip. The horizontal, middle strip is in the form of a coil whose rings are unidirectionally turned down beneath the direct corner in the direction of the exit wire. The bent, outside end of the coil is coupled beneath the direct corner with the second outer strip, which is in the shape of an right-angled bracket, whose side flange is parallel to the plane of the coil in the central part and located between the orthogonal to it and parallel between the primary and secondary lateral elements. Furthermore, the length of the accompanying bent, internal ring of the wire from the secondary lateral element is less than the length of the primary lateral element for the length of the primary outer section of the braced, current distributor. |
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High-voltage vacuum circuit breaker Invention relates to electrical engineering, particularly to high-voltage vacuum circuit breakers. The high-voltage vacuum circuit breaker contains a frame, a pole terminal with vacuum arc-quenching chambers and isolating rods, shaft, electromagnet with an interleaved core, actuating and tripping coils, armature and permanent magnets. The electromagnet is provided with two latches which hold the armature in two extreme positions due to the effect of the permanent magnets. The armature has two end clearances: one near the left end and the other near the right end. Near one end in the area of the tripping coil there are two more lateral working clearances. Magnetic conductance of the lateral working clearance is several times greater than magnetic conductance of the said end working clearance. Also the vacuum circuit breaker has a tripping spring. |
Another patent 2513236.