Pole piece for use at medium voltages and method of its manufacture // 2631817
FIELD: electricity.SUBSTANCE: pole piece has insulating coating that is made of a thermoset or thermoplastic material in which the transition areas between the materials and the relief structures of the vacuum circuit-breaker and/or the connection terminals are coated with the insulating coating. In order to improve the process of manufacturing and obtaining a reproducible dielectric with the required characteristics, the transition areas are arranged between the plastic piece and the contact part of the pole piece and they are made flat, so that they do not have rounded edges and/or ledges.EFFECT: facilitating the separation of the finished pole piece from the mould due to the tight closing of the joint between the elements.10 cl, 4 dwg

ethod of forming under pressure of thermoplastic pole parts and casting form for implementating such // 2629067
FIELD: metallurgy.SUBSTANCE: mould during the casting process is fixed and has at least one vacuum interrupter and contact terminals as well as at least one injection port or gate to inject the thermoplastic material into the mould. The injection mould has several injection openings, at least along its long axis, for injecting a hot thermoplastic material. In this case, the injection holes or gates can be controlled so that they inject the thermoplastic material simultaneously or at a predetermined time dependent on the injection scheme.EFFECT: shorter duration for the manufacture of the cast pole piece with a pressure gradient along the long axis and ensuring uniform distribution of the material during the casting process.11 cl, 4 dwg

Insulator made of composite material, designed to contain the arc chute // 2620585
FIELD: electricity.SUBSTANCE: insulator of composite material designed to accommodate the arc chamber has a cylindrical portion, which is arc chute. The insulator contains at each of its ends a truncated cone portion (10, 16). The insulator is made of first and second chambers (4, 6). Each of these chambers has a truncated conical portion (10, 16) followed by a cylindrical portion (8, 14). First and second chambers (4, 6) connected to each other end to end of their cylindrical portions (8, 14).EFFECT: improved operational capabilities.10 cl, 5 dwg

Screening element for medium voltage switchgear // 2613683
FIELD: electricity.SUBSTANCE: vacuum interrupter has at least two blades, arranged to move the path switching between the open and closed states. The shielding member is disposed around the location area of the vacuum interrupter contacts. At least the inner surface of the screen is provided with a relief structure with a rough surface or ordered. To achieve the technical effect relief structure is designed such that at a predetermined constant or approximately constant volume (Vi) of the screen housing area ratio (S2) Treated surface with an embossed structure to the area (S1) Without raw surface relief structure is greater than 1, i.e. the condition V1≈V2 and S2/S1>1.EFFECT: increase screening efficiency through the implementation of the screen with a surface that has a high energy absorption.5 cl, 1 dwg

Pole part of automatic circuit breaker and method of its manufacturing // 2574337
FIELD: electricity.SUBSTANCE: pole part of automatic circuit breaker (1) comprised of external insulating sleeve (7) made of continuous synthetic material and insert (8), which is intended for vacuum circuit breaker used for mid-voltage circuit switching and placed inside the sleeve and supported by it the method for its manufacturing envisages application of layer (12) of adhesive material to at least lateral area (11) of the circuit breaker insert (8). The circuit breaker insert (8) with coating is built in by pouring continuous synthetic material in order to form a single layer surrounding the external insulating sleeve. Thickness of intermediate layer (12) applied between insert (8) and surrounding insulating sleeve (7) varies from 0.5 up to 5 mm. At that intermediate layer (12) performs function of mechanical compensation and adhesive function simultaneously.EFFECT: providing strong cohesion between the insert of vacuum circuit breaker and insulating material surrounding it without usage of additional gluing agent.16 cl, 2 dwg

Fibre-reinforced insulation for compound-filled circuit breakers // 2572609
FIELD: electricity.SUBSTANCE: invention relates to a vacuum circuit breaker (300) filled by an insulating material (301) that includes the first main layer (100) comprised of the first sublayer (101), the second sublayer (102) and the third sublayer (103). The second sublayer (102) is placed between the first sublayer (101) and the third sublayer (103). The first sublayer (101), the second sublayer (102) and the third sublayer (103) comprise fibres, at that the first sublayer (101) comprises a group of the first fibres (110) parallel to each other.EFFECT: improved outer dielectric strength of the circuit breaker having required mechanical protection against environmental loads.17 cl, 4 dwg

Vacuum circuit breaker to be used in medium- and high-voltage circuits // 2546657
FIELD: electricity.SUBSTANCE: vacuum circuit breaker to be used in medium- and high-voltage circuits comprises at least one body (1) of a pole part, where vacuum insert (2) is placed with a pair of respective coaxial electric contacts (3, 4) inside it. A fixed electrical contact (3) is coupled electrically to the upper clamp (5) at the body (1) of a pole part, while axis-movable electric contact (4) is coupled electrically to the lower clamp (6) at the body (1) of a pole part and driven by insulated traction (7), which passes through a protective plate (8) placed at the bottom hole in the body (1) of pole part. The protective plate (8) is made of rigid plastic insulating material, at that along perimeter of the protective plate (8) there is at least one moulded sealing ring (9, 9a, 9b) made of elastic material.EFFECT: developing a circuit breaker with simple and effective protection device against electric breakdowns between the lower electrical clamp and edges of the pole part body.10 cl, 7 dwg

Electrical isolator // 2528613
FIELD: electricity.SUBSTANCE: electrical isolator comprises a body confining a hole made through it, the first electric contact set at the first end of the hole, the second electric contact set at the second end of the hole and able of moving. Design of the said second contact provides for timely movement through the hole for electrical connection with the first contact or disconnection from it. There are also at least two concave shields controlling the electric field and attached to the body at the respective hole ends and around the hole so that they are laid across the hole and the open ends of each shield are turned to each other.EFFECT: faster response.27 cl, 25 dwg

Vacuum circuit breaker with terminal clamps rigidly fixed to buses at both sides // 2516337
FIELD: electricity.SUBSTANCE: 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).EFFECT: manufacturing of a compact circuit breaker which at fast closing speed ensures a reliable pathway for current with high current-carrying capacity between terminals of the vacuum circuit breaker.10 cl, 1 dwg

Vacuum switching lamp // 2510094
FIELD: electricity.SUBSTANCE: 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.EFFECT: provision of high dielectric strength of a switching lamp having compact design.5 cl, 1 dwg

ethod for manufacturing contact part of medium-voltage switching device and contact part // 2449404
FIELD: electricity.SUBSTANCE: 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.EFFECT: excluding necessity to make expensive reinforcement of interruption vacuum chamber against force impacts during die-casting on switching contact side in the area of moulding core.16 cl, 2 dwg

Attachment method of element in electric device and electric device such as vacuum circuit breaker containing at least two parts fixed according to such method // 2428762
FIELD: electricity.SUBSTANCE: 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.EFFECT: improving attachment processibility of dielectric screens on housing of vacuum circuit breaker.11 cl, 13 dwg

Vacuum circuit breaker // 2419911
FIELD: electricity.SUBSTANCE: 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.EFFECT: increasing mechanical strength and reliability of connections of circuit breaker, simplifying its design and reducing weight and dimension parametres.7 cl, 4 dwg

Vacuum arc-quenching chamber for low voltage switching installations // 2407094
FIELD: electricity.SUBSTANCE: 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.EFFECT: improved resistance to external pressure.17 cl, 4 dwg

Switch vacuum chamber // 2400854
FIELD: electrical engineering.SUBSTANCE: 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.EFFECT: improved anti-burning properties and higher insulating strength.10 cl, 1 dwg

Interrupter pole insulated with solid electric insulating material with connection of moving contact pieces on edge side // 2377684
FIELD: electricity.SUBSTANCE: 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.EFFECT: increasing economy during manufacture and simplifying erection.10 cl, 2 dwg

Vacuum switching unit // 2374718
FIELD: machine building.SUBSTANCE: 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.EFFECT: increasing of electric strength of inner insulation of chamber and its keeping up to total output of electrical resource.2 dwg

Vacuum arc chute with shielding to be applied by thermosetting // 2331133
FIELD: electricity.SUBSTANCE: invention relates to vacuum arc chute with molded polar detail for use in low, medium and high voltages and to process of manufacture. At the stage of preparation for further filling, vacuum arc chute is provided with shielding consisting of elastic material from the external side and, accordingly, elastomer or plastomer material which is applied to vacuum arc chute surface without additional tensile mechanical means and only by thermosetting method.EFFECT: simplification and cheapening of vacuum arc chute manufacture with simultaneous improvement of mechanical and electrical parameters.6 cl

Vacuum switch // 2317609
FIELD: vacuum switches, primarily outdoor ones.SUBSTANCE: proposed vacuum switch has chamber installed in insulating tank accommodating vacuum arc chute installed in first insulating case, fixed contact coupled with first current-carrying bushing of switch, and movable contact connected to second current-carrying bushing. Current-carrying bushings are partially disposed in tank and partially are brought out of tank through cover. Space between outer surface of vacuum arc chute and inner surface of first case is filled with insulating material. Second insulating case made in the form of cylinder with two longitudinal ribs is installed outside the first case coaxially with the latter. Second case is mounted on first one in such manner that current-carrying bushings are disposed on opposite ends of second case relative to ribs. Rib width in direction perpendicular to longitudinal axis of case is chosen to ensure reliable air insulation between current-carrying bushings.EFFECT: enhanced reliability of outdoor insulation, simplified design, easy maintenance in operation, and enhanced environmental friendliness due to dispensing with liquid insulation in switch design.6 cl, 4 dwg

Vacuum contactor // 2276424
FIELD: electrical engineering; low-voltage devices for switching ac power circuits.SUBSTANCE: proposed vacuum contactor has insulating case, electromagnetic operating mechanism, vacuum arc-control chamber coupled through movable current lead and insulating swivel lever with electromagnetic operating mechanism armature, and disconnecting spring. Insulating case is provided with jumpers disposed in clearance between electromagnetic operating mechanism and current leads of mentioned chamber to form opening for heat transfer. Contactor incorporates provision for reducing thermocyclic impacts on insulator-metal junction of chamber liable to cause its destruction.EFFECT: enhanced operating reliability of contactor in handling heavy currents.1 cl, 2 dwg

Vacuum contactor // 2273072
FIELD: electrical engineering; ac high-voltage circuit-opening devices.SUBSTANCE: proposed vacuum contactor has insulating case, vacuum arc-control chambers, electromagnetic operating mechanism, disconnecting spring, articulated joint, and insulating rotary lever that mounts plate with hole to pass movable current lead rod and hold-down spring. Articulated joint is disposed in space between movable current lead and rotary lever; hold-down spring abuts against stop on one end and against plate with hole affording easy movement of rod along its axis, on other end.EFFECT: simplified design and enhanced reliability of contactor.1 cl, 2 dwg

Power switch // 2188474
The invention relates to a power switch, intended for kilovolt range and containing a vacuum interrupter chamber, covered with no gap sheath of elastomeric material of a large dielectric strength