RU179394U1 - AUTOMATIC CIRCUIT BREAKER DEVICE - Google Patents

Abstract

The invention relates to electrical appliance construction, namely, to drawers of circuit breakers. The technical result consists in simplifying the design of the device and increasing the reliability of its operation. on the limb of the side wall of the device. The side walls of the housing are equipped with symmetrically mounted elastic conductive plates, the free consoles of which are molded C-shaped with the possibility of interaction with the side surfaces of the switch. The carriage of the screw mechanism is equipped with a cam plate in contact with electrical position sensors that are located on the bottom of the housing, as well as a pin carrier interacting with a mechanical position indicator. The self-roll-out locking mechanism is made at the front ends of the guides in the form of two spring-loaded cylindrical rods with handles. In this case, the front ends of the guides are in the form of half-cylinders, and the side surfaces of the half-cylinders are equipped with closed bayonet type grooves. Moreover, the handles of the rods are placed inside the bayonet grooves with the possibility of vertical translational and horizontal rotational movement. 11 ill.

Description

The proposed utility model relates to electrical engineering, namely to the withdrawable devices of low-voltage circuit breakers for high currents and is intended for use as part of complete switchgears (switchgear) and special-purpose products.

Known power circuit breakers of withdrawable design for currents up to 6300 A, incorporating a switch and a withdrawable device itself (see sources [1-4]). The withdrawable device is equipped with external terminals for permanent connection to the power switchgear busbars and internal plug-in contacts for connecting / disconnecting the circuit breaker itself [1]. In some information sources, withdrawable devices are called withdrawable devices or a “basket” for a circuit breaker [3, 4]. The main functional purpose of such devices is the operative connection of the circuit breaker itself with the power buses of the complete device through plug-in contacts when the circuit breaker is inserted in, the operational disconnection with the power circuit when the circuit breaker is rolled out of the device. To ensure electrical safety when the circuit breaker is turned off, the plug-in contacts are closed by insulating curtains. The shutters are movable under the action of the blind control unit, which is associated with the position of the switch relative to the drawer. The design of the shutter control nodes provides a description of the patent [5-7]. The source [5] describes the complicated design of the levers for controlling the shutter; moreover, the shutter has two degrees of movement in the depth of the device and along the back wall of the device from left to right; for implementation, a large number of parts are required. In the solution according to the patent [6], the shutter control lever moves progressively perpendicular to the shutter, the control unit has complex parts, requires an additional layout space for placement along the depth of the retractable device, increasing the dimensions of the device. A more rational site for the patent [7]. Here, the control lever is located on the side of the sliding device, makes rotational movements, but is complicated in shape, crosses the side wall of the device, being outside the device, requires an additional bracket, torsion spring and other structural elements to be installed. When performing routine maintenance on the circuit breaker itself, as well as repair and other maintenance work on the switchgear, the withdrawable device provides three positions of the circuit breaker:

- “pumped in” - this is the operating position when the main and auxiliary circuits are turned on, the insulating curtain is open;

- “test” - the position for testing and adjustment, when the main circuit is disconnected, the insulating shutter is closed, and only the auxiliary circuit for testing is turned on;

- “pumped out” - the main and auxiliary circuits are disconnected, the insulating curtain is closed.

To implement the process of rolling in and out of the circuit breaker, the device is usually equipped with a screw mechanism [8-9] with a manual drive with a handle, less often with a gear, for example, in the form of a worm pair [10]. In the patent [8], the screw mechanism is shown in Fig. 4 and consists of a screw-threaded rod, which is rotatably fixed, and a carriage inside which an internal thread mating with the screw is made. The carriage is mounted with the possibility of translational movement and is connected to subsequent complex mechanisms of the retractable device. A similar mechanism is described and shown in Fig. 4 and 6, pos. 21 in the patent [9]. The source [10] describes and depicts a powerful drive mechanism in the form of a worm gear, characterized by the need for accurate manufacturing, accurate installation and structural complexity. Other auxiliary functions are also assigned to the withdrawable devices, such as mechanical and electrical indication of the position of the circuit breaker inside the device, blocking of movements, etc. Mechanical indicators of the position of the circuit breaker in the withdrawable device are implemented as structural elements that appear or change their position in the withdrawable circuit breaker. display window depending on the location of the switch [1-6]. The electric position sensors of the circuit breaker are made primarily in the form of end microswitches that are affected by the moving parts of the circuit breaker [11]. According to [11, see fig. 1-3] limit switches are installed outside the sliding device along the side wall, are available for manual change of state, which does not guarantee protection against unauthorized access to the circuit-breaker rolling out. In addition, communication with the switch is made by a system of levers, rollers, stops and springs, which complicates the design. The movable switch is mounted on telescopic rails, the fixed parts of which are attached to the side walls of the device, and the movable ones - to the side walls of the switch (sources [9, 11]). To limit the movement and fixation of the circuit breaker in predetermined positions in the structures of the withdrawable devices, locking mechanisms against self-roll-out are provided [12]. In the source [12, see Fig. 4, 5] shows a mechanism for locking the roll-out of a lever-type switch with a spring interacting with curly grooves on the side walls of the drawer. It is made in the form of two unbalanced levers, one of which is the control, and the second is spring-loaded and is locking. Such plate-like locking mechanisms do not withstand single impacts, and under conditions of multiple impacts and vibration loads, they tend to unlock due to the freedom of oscillatory movements in two planes. The withdrawable device must also provide, in one way or another, the ground connection of its housing to the switch housing in the operating, test and deflated position. Grounding connection can be made by well-known means using flexible cables with cable lugs or grounding connector [13]. It is simpler and more convenient to use special sliding elements [14, 15]. The source [14] describes a design of several elements, a complex design with a coil spring. In the patent [15], an attempt was made to dispense with one element, but its shaping is difficult. Drawer designs with the mentioned nodes and mechanisms are quite complex. Devices are developed for their proprietary switches. Therefore, the design features of the sliding devices of various companies and their differences are due to the features of the circuit breakers of these companies, the purpose and specific operating conditions. The development of devices with improved technical and economic indicators is possible with the use of circuit breakers of the new series and with the use of other layout, design and technological solutions. The inventive utility model is one of the options for a withdrawable device for new circuit breakers operated in conditions of increased mechanical stress.

The closest to the claimed model in technical essence and essential features should be considered a retractable device, presented in the source [2, 3]. The prototype has a housing consisting of a bottom, two side walls and a cover on which a number of terminal blocks are mounted. The rear wall of the insulating material is equipped with upper and lower terminals (see page 49 in the source [3]), plug-in contacts closed by movable protective curtains. The shutters are opened by the control unit, which is a complex curly slats that move under the action of the rear wall of the circuit-breaker. At the bottom of the device, a screw mechanism is fixed to move the switch using the handle and the carriage. The switch is mounted on rails and has a mechanical connection to the carriage. At the bottom of the front panel of the device, a mechanical indicator of the position of the switch relative to the device is displayed in the form of an index of three positions “Pumped in”, “Test”, “Pumped out” (see page 13 of source [3]). The screw mechanism automatically locks the withdrawal of the circuit breaker in these three positions. A button is provided to unlock the handle. The withdrawable device is also equipped with electrical sensors for the position of the switch inside the device, in the form of controlled contacts (see page 44 source [3]), the terminal blocks of which are displayed on the top left of the housing cover. The prototype is a fairly complex device designed for general industrial use, has the advantages and disadvantages of its nodes, noted in their counterparts [5-12]. The technical solutions of its units are not always suitable for the specific requirements of the power supply systems of special objects in terms of impact of shock loads, vibrations, temperature range, requirements for materials and components.

The proposed model aims to create a sliding device for a new series of circuit breakers with the following technical results:

- simplification of the design of the device and its components;

- improving the reliability of operation in conditions of external mechanical stresses together with circuit breakers of a similar purpose.

The specified technical result is achieved in that in a drawer of a circuit breaker comprising a housing consisting of a bottom, a cover, two side walls molded from sheet material, and a rear wall of electrical insulation material with upper and lower terminals, plug-in contacts closed by a movable spring-loaded curtain , a curtain control unit interacting with the structural elements of the switch, a screw mechanism with a carriage for inserting and withdrawing the switch, roller guides, self-extracting lock mechanism, mechanical position indicator and electric switch position sensors, the said shutter control unit is made in the form of a flat one-armed lever made of sheet material, movably mounted with the first end on the bend of the side wall of the device and the second end in the groove of the spring-loaded curtain, and the side walls of the case from the inside equipped with symmetrically mounted elastic conductive plates, the free consoles of which are molded C-shaped with the possibility of interaction with nar zhnymi switch lateral surfaces. The screw mechanism carriage is equipped with a cam plate in contact with electrical position sensors, which are located on the bottom of the housing, as well as with a pin carrier, interacting with a mechanical position indicator. In addition, the self-roll-out locking mechanism is made at the front ends of the roller guides in the form of two spring-loaded cylindrical rods with handles mounted in vertical cylindrical holes. In this case, the front ends of the guides are in the form of half-cylinders coaxial to vertical cylindrical holes, and the side surfaces of the half-cylinders are provided with closed bayonet-type grooves extending into the cavity of the cylindrical holes. Moreover, the handles of the rods are placed inside the bayonet grooves with the possibility of vertical translational and horizontal rotational movement.

The implementation of the control unit protective blinds in the form of a flat one-armed lever of sheet material mounted movably with the first end on the bend of the side wall of the device and the second end in the groove of the spring-loaded curtain, reduces the number of parts of the node, simplifies its design. Elastic electrically conductive plates, the free consoles of which are molded in a C-shape with the possibility of interaction with the outer side surfaces of the circuit breaker, provide a structurally simple, using two identical parts sliding connection of the device and the circuit breaker. The symmetrical placement of the plates on the sides of the device creates a reliable contact connection of the housings under external mechanical stress. Placing the electric sensors of the position of the switch on the bottom of the drawer under the switch, which are in contact with the screw mechanism through a cam plate mounted on its carriage, completely exclude free mechanical access to the buttons of the electric sensors and electrical access to their terminals. This ensures that the requirements for distance protection against unauthorized access to the circuit breaker are met. The supply of the screw carriage of the screw mechanism with a pin carrier connected to the figured groove of the mechanical indicator of the position of the switch simplifies the kinematics of the transmission of movement from the switch to the indicator, while limiting the amplitude of oscillations of the indicator parts when exposed to external vibration and shock loads. The implementation of the self-roll-out locking mechanism at the front ends of the roller guides in the form of two spring-loaded cylindrical rods with handles mounted in vertical cylindrical holes creates a reliable self-roll-out restriction that can withstand external shock loads in the direction of travel of the circuit breaker, which increases the reliability of the lock. The design of the front ends of the guides with semicylinders, coaxial vertical cylindrical holes and the supply of the side surfaces of the semicylinders with closed bayonet-type grooves extending into the cavity of the cylindrical holes, the placement of the rod handles inside the bayonet grooves with the possibility of vertical translational and horizontal rotational movement create a simple constructionally reliable and easy to operate reliable locking mechanism.

The proposed utility model can be used as a vibration- and shock-resistant withdrawable device for circuit breakers of similar and other purposes in the mass production of multi-pole low-voltage circuit breakers for high rated currents of 1000-6300 A. Thanks to the proposed design, a retractable device of relatively simple design is obtained, which has increased reliability at operation under the influence of single and multiple shocks, as well as vibration loads.

An analysis of the prior art by the applicant, including a search by patents and scientific and technical sources of information and identification of sources containing information about analogues of the claimed utility model, allowed to establish that the applicant did not find a prototype characterized by features identical to all the essential features of the claimed utility model. The determination from the list of identified analogues of the prototype as the closest in terms of the set of essential features of the analogue made it possible to identify the set of significant distinguishing features in relation to the technical result perceived by the applicant in the claimed design set forth in the utility model formula.

Therefore, the claimed utility model meets the condition of "novelty."

The design of the claimed utility model is shown in the drawings of FIG. 1-9. In the figure of FIG. 1 shows a left axonometric view of the internal components of the right side wall of the drawer, and FIG. 2 is an axonometric view of the internal components of the left side of the device from the right with a conditionally disassembled roller guide and a mechanism for locking the switch from self-rolling out. In FIG. 3 shows a front view of the device with the protective curtain open. In the figure of FIG. Figure 4 is a view A from outside left of the drawer. The drawings of FIG. 4a, 4b, show the same view A of the withdrawable device, but with a switch that is shown in the following positions: “pumped in” - FIG. 4a; “Pumped out” - FIG. 4b. The findings of the device in FIG. 4a, 4b are conventionally not shown. FIG. 5 gives view B an idea of the design of the device from behind, and FIG. 6 and 7 - on the placement of nodes at the bottom of the device when viewed from above, view B. FIG. 6 shows the position of the screw mechanism, the mechanical indicator of the position of the switch, the electric position sensors, the cam plate when the switch is in, and FIG. 7 - when the circuit breaker is pumped out of the drawer. In FIG. Figure 8 shows a section GG on the axis of the screw mechanism, revealing its design and interaction with the switch. Section DD in FIG. 9 shows the position of the pin carrier and cam plate on the carriage of the screw mechanism in a vertical plane.

; «тест» -

; «выкачен» -

). Условные знаки нанесены на радиусный участок 43 (см. фиг. 2) внешнего плеча 44 вращающегося двуплечего рычага 45 (см. фиг. 6). Внутреннее плечо 46 рычага 45 связано своим фигурным пазом 47 со штифтовым водилом 48. Водило 48 состоит из Г-образного кронштейна 49 (см. фиг. 9) с полкой 50 в виде равнобедренного треугольника и штифта-водила 51, установленного в вершине треугольника. Второй полкой 52 Г-образный кронштейн 49 закреплен на боковой поверхности 53 каретки 32 винтового механизма 31. Для электрической индикации положения выключателя внутри выдвижного устройства на дне 1 (см. фиг. 6, 7) установлены датчики 54, 55 представляющие собой специальные переключатели с поворотными рычажками 56, 57. На рычажки 56, 57 воздействует кулачковая планка 58, (закреплена на второй боковой поверхности 59 каретки 32), в соответствии с положением каретки на винте 33 винтового механизма 31, перемещающего выключатель 19. При установленном в выдвижное устройство выключателе доступ к датчикам 54, 55 невозможен, как механический доступ к поворотным рычажкам 56, 47, так и электрический доступ к клеммам датчиков. Такое конструктивное решение позволяет использовать датчики положения и в качестве датчиков несанкционированного доступа к выключателю, гарантирующих дистанционное уведомление о несанкционированных действиях по выкатыванию выключателя. Это упрощает конструкцию, так как не требуется установка дополнительных датчиков для обеспечения требований по защите от несанкционированного доступа к выкатыванию выключателя при применении выключателя в составе специзделий. Блокировка выключателя от самовыкатывания в положении «выкачен» осуществляется механизмами блокировки 60, 61 (см. фиг. 1, 2), выполненных на фронтальных концах 62, 63 роликовых направляющих 21, 22. Каждый механизм представляет собой подпружиненный пружиной 64 цилиндрический стержень 65 с рукояткой 66, установленный в вертикальном цилиндрическом отверстии 67. При этом фронтальные концы 62, 63 направляющих 21, 22 имеют форму полуцилиндров, коаксиальных вертикальным цилиндрическим отверстиям 67, а боковые поверхности полуцилиндров снабжены замкнутыми пазами 68, 69 байонетного типа, выходящими в полость цилиндрических отверстий 67. Причем рукоятки 66 стержней 65 помещены внутри байонетных пазов 68, 69 с возможностью вертикального поступательного и горизонтального вращательного перемещения. Механизмы блокировки 60, 61 выключателя 19 от самовыкатывания выполнены в виде усиленных конструкций за счет утолщения фронтальных концов 62, 63, применения стержней 65 соответствующего сечения и способны выдержать одиночные удары в направлении движения выключателя, величина которых регламентируется условиями эксплуатации. Одновременно механизмы блокировки просты в управлении и состоят из минимального количества деталей 64-66. Для приведения механизма в режим автоблокирования достаточно установить рукоятку 66 в вертикальную часть байонетного паза 68, для разблокирования в горизонтальную часть паза 68. Фиксация выключателя в положении «выкачен» производится в отверстиях 70, выполненных в направляющей планке 71 выключателя 19 (см. на фиг. 4б). Для ограничения доступа к винтовому механизму 31 отверстие 38 снабжено задвижкой 72 (см. фиг. 2), которая подпружинена пружиной 73 (см. фиг. 6) и приводится в движение по горизонтали посредством стойки 74. Перемещение задвижки 72 при замкнутых контактах автоматического выключателя блокируется посредством нажатия на конец 75 (см. фиг. 6) рычага 76 (см. фиг. 2) со стороны механизма свободного расцепления, находящегося внутри выключателя (на рисунках механизм не изображен). Рычаг 76 вращается на оси 77 (см. фиг. 6) и взаимодействует с фиксирующим рычагом 78 (см. фиг. 2), который стопорит перемещение штифта 79, закрепленного на задвижке 72.The sliding device of the circuit breaker (see Fig. 1-5) contains a housing consisting of a bottom 1, a cover 2, two side walls 3, 4, molded from sheet material, and a rear wall 5 (see Fig. 4, 5) of electrical insulation material with upper 6 and lower terminals 7, plug-in contacts 8 (see Fig. 3), closed by a movable, spring-loaded spring 9, the shutter 10. The spring-loaded shutter 10 is located behind the front sheet 11, (see Fig. 1, 2). The horizontal stroke of the curtain is limited by the screw 12 mounted on the curtain and the length of the groove 13 in the front sheet 11 (see Fig. 3). The control unit of the curtain, made in the form of a flat one-armed lever 14 (see Fig. 2, 3, 5, 6) of sheet material mounted movably with the first end 15 on the limb 16 of the side wall 3 of the device, and the second end 17 in the groove 18 of the spring-loaded curtain 10 (see FIGS. 2 and 5). The lever 14 interacts with a roller (not shown in the figure) mounted on the side wall of the switch 19 (see Fig. 4a, 4b). To access the groove 18 of the shutter 10, a groove 20 is made in the front wall 11 (see Figs. 2, 3). To slide in and out the switch in the device, roller guides 21-26 are fixed on the side walls 3, 4, in which rollers are fixed on the axes 27 28. Inside, the side walls 3, 4 are equipped with symmetrically mounted elastic conductive plates 29 (see Fig. 1, 2), free consoles 30 see (Fig. 6) which are molded in the form of a C-shaped profile, with the possibility of interaction with the outer side the surfaces of the switch 19. The plate 29 with its C-shaped ends 30 provide a sliding ground connection of the drawer housing to the switch housing in the operating, test, and deflated positions. Since the elastic plates 29 are mounted on opposite side walls of the device, when exposed to lateral vibrations and lateral multiple impacts, the transient electrical resistance of the contact connection of the drawer housing to the switch housing remains constant. This increases the reliability of sliding grounding in conditions of external mechanical stress. The screw mechanism 31 with the carriage 32 (see. Fig. 1, 2, 6, 7, 8) for driving in and out of the switch, is fixed to the bottom 1 of the device. The screw mechanism 31 has a threaded roller 33 (see Fig. 8, 9) with a hexagonal blind hole 34 for connection with a removable hexagonal handle 35, which is mounted on the right side wall 4 with spring holders 36 (see Fig. 1). To access the roller 33 on the lower strip 37 of the device (see Fig. 1) a hole 38 is made opposite the blind hole 34. A carriage 32 having an internal thread is installed on the threaded portion of the roller 33. Since the carriage 32 (see Fig. 8) is limited from rotational movement by the bottom 1 of the device, the carriage is only able to reciprocate along the roller 33. The extreme positions of the carriage 32 are regulated by the positioning nuts 39, 40. When the switch is moved, the carriage 32 with its protrusion 41 engages with the housing of the switch 19 and moves the switch to one of the required positions: “pumped in” - FIG. 4a; "test"; “Pumped out” - FIG. 4b. For visual indication of the position of the switch inside the device on the front plate 37 (see Fig. 1, 3), an indication window 42 is provided in which one of the three conventional signs is reflected (“pumped-in” - a sign

; "Test" -

; "Pumped out" -

) Conventional signs are applied to the radius portion 43 (see Fig. 2) of the outer shoulder 44 of the rotating two-arm lever 45 (see Fig. 6). The inner shoulder 46 of the lever 45 is connected by its figured groove 47 to the pin carrier 48. The carrier 48 consists of an L-shaped bracket 49 (see Fig. 9) with a shelf 50 in the form of an isosceles triangle and a carrier pin 51 mounted at the apex of the triangle. The second shelf 52 L-shaped bracket 49 is mounted on the side surface 53 of the carriage 32 of the screw mechanism 31. For electrical indication of the position of the switch inside the drawer on the bottom 1 (see Fig. 6, 7) sensors 54, 55 are installed, which are special switches with rotary levers 56, 57. The cam plate 58 acts on the levers 56, 57 (mounted on the second side surface 59 of the carriage 32), in accordance with the position of the carriage on the screw 33 of the screw mechanism 31, which moves the switch 19. When installed in the sliding The construction of the switch does not allow access to the sensors 54, 55, both mechanical access to the rotary levers 56, 47 and electrical access to the terminals of the sensors. Such a constructive solution allows the use of position sensors as sensors of unauthorized access to the circuit breaker, guaranteeing remote notification of unauthorized actions to roll out the circuit breaker. This simplifies the design, since it does not require the installation of additional sensors to meet the requirements for protection against unauthorized access to the circuit breaker when using the circuit breaker as part of special products. The circuit breaker is locked from self-rolling out in the “pumped out” position by locking mechanisms 60, 61 (see Fig. 1, 2) made on the front ends 62, 63 of the roller guides 21, 22. Each mechanism is a spring-loaded cylindrical rod 64 with a handle 65 66 mounted in a vertical cylindrical hole 67. In this case, the front ends 62, 63 of the guides 21, 22 are in the form of half cylinders coaxial to the vertical cylindrical holes 67, and the side surfaces of the half cylinders are provided with closed grooves 68, 69 bayonet type, extending into the cavity of the cylindrical holes 67. Moreover, the handles 66 of the rods 65 are placed inside the bayonet grooves 68, 69 with the possibility of vertical translational and horizontal rotational movement. The locking mechanisms 60, 61 of the switch 19 from self-rolling out are made in the form of reinforced structures due to the thickening of the front ends 62, 63, the use of rods 65 of the appropriate section and are able to withstand single shocks in the direction of movement of the switch, the size of which is regulated by the operating conditions. At the same time, the locking mechanisms are easy to manage and consist of a minimum number of parts 64-66. To bring the mechanism into self-locking mode, it is enough to install the handle 66 in the vertical part of the bayonet groove 68, for unlocking in the horizontal part of the groove 68. The circuit breaker is locked in the “pumped out” position in the holes 70 made in the guide bar 71 of the switch 19 (see. FIG. 4b). To limit access to the screw mechanism 31, the hole 38 is equipped with a shutter 72 (see Fig. 2), which is spring-loaded with a spring 73 (see Fig. 6) and is driven horizontally by a stand 74. Moving the shutter 72 is blocked when the contacts of the circuit breaker are closed by pressing the end 75 (see Fig. 6) of the lever 76 (see Fig. 2) from the side of the free trip mechanism located inside the switch (the mechanism is not shown in the figures). The lever 76 rotates on the axis 77 (see Fig. 6) and interacts with the locking lever 78 (see Fig. 2), which stops the movement of the pin 79 mounted on the valve 72.

. Одновременно каретка 32 своей кулачковой планкой 58, нажимая на поворотный рычажок 56 датчика 54 (см. фиг. 6), выдает электрический сигнал о положении выключателя в систему управления электроснабжением объекта. Выкатывание выключателя производится в обратном порядке. Вращая ключ 35 против часовой стрелки, выключатель перемещается сначала в промежуточное положение «тест». В индикационном окне 42 появляется знак «тест» -

. При этом на рычаг 14 узла управления шторкой 10 боковая стенка выключателя 19 больше не воздействует. Шторка 10 под действием пружины 9, увлекая своим пазом 18 рычаг 14, возвращается в исходное состояние и закрывает доступ к втычным контактам 8. Цилиндрические стержни 65 механизмов блокировки 60, 61 под действием пружин 64 упираются в поверхности П направляющих планок 71 (см. фиг. 4б) выключателя 19 (рукоятки 66 механизмов блокировки должны находиться в вертикальных частях байонетных пазов 68, 69). Для перемещения выключателя из положения «тест» в положение «выкачен» продолжают вращать ключ 35 против часовой стрелки до появления в индикационном окне 42 условного знака «выкачен» -

. При этом цилиндрические стержни 65 механизмов блокировки 60, 61 под действием пружин 64 автоматически заходят в отверстия 70 направляющих планок 71, осуществляя надежную механическую блокировку выключателя 19 от самовыкатывания в условиях наклонов объекта, в котором установлен выключатель. В положении «выкачен» каретка 32 кулачковой планкой 58, нажимая на поворотный рычажок 57 датчика 55 (см. фиг. 7), выдает электрический сигнал о положении выключателя «выкачен» в систему электронного управления. Для начала вкатывания выключателя рукоятки 66 механизмов блокировки 60, 61 должны быть переведены в горизонтальные части байонетных пазов 68, 69.The sliding device operates as follows. In the state when the switch is pumped out (see Fig. 1, 2, 4b, 7), the shutter 10, under the action of the spring 9, blocks access to the plug-in contacts 8 (pos. 8 see in Fig. 3), ensuring electrical safety during maintenance. To drive the switch, the valve 72 is pushed back (using the rack 74), the key 35 is inserted into the hole 38. The key mates with the hexagonal hole 34 (see Fig. 8) and rotates clockwise. When the screw 33 is rotated, the carriage 32 begins to move deeper into the sliding device, entraining the switch 19, which is engaged with the protrusion 41 of the carriage 32. When the switch is inserted, the lever 14 acts on the lever 14 with its left side wall (see Fig. 6), turning the lever against clockwise. The end 17, which is located in the groove 18 of the shutter 10 (see Fig. 2), the lever 14 moves the shutter to the left, releasing the plug-in contacts 8 for connection with the cutting contacts of the switch. The elastic stabilizing plates 29 (see Fig. 6), in contact with their C-shaped consoles 30 with the side walls of the switch 19, provide a reliable sliding connection of the device casing and the switch. (The elasticity of the plates 29 is selected taking into account the parameters of the lateral vibration and shock effects when conducting research tests according to the criterion of stability of the transitional electrical resistance of the contact connection "switch housing - device housing"). This provides reliable sliding grounding using two identical elastic conductive plates 29, which simplifies the design of the device. When the circuit breaker is plugged in, the carriage 32 (see Fig. 6), using the pin carrier 48, moves the lever 45 of the mechanical indicator to the "pumped" position. In the display window 42 a sign is displayed

. At the same time, the carriage 32 with its cam plate 58, pressing the rotary lever 56 of the sensor 54 (see Fig. 6), gives an electrical signal about the position of the switch in the power supply control system of the object. The circuit breaker is drawn out in the reverse order. Turning the key 35 counterclockwise, the switch first moves to the intermediate position "test". In the display window 42 appears the sign "test" -

. In this case, the side wall of the switch 19 is no longer affected by the lever 14 of the shutter control unit 10. The shutter 10 under the action of the spring 9, entraining the lever 14 with its groove 18, returns to its original state and closes the access to the plug-in contacts 8. The cylindrical rods 65 of the locking mechanisms 60, 61 under the action of the springs 64 abut against the surface P of the guide rails 71 (see. FIG. 4b) of the switch 19 (the handles 66 of the locking mechanisms should be in the vertical parts of the bayonet grooves 68, 69). To move the switch from the “test” position to the “pumped out” position, continue to rotate the key 35 counterclockwise until the symbol “pumped out” appears in the display window 42 -

. In this case, the cylindrical rods 65 of the locking mechanisms 60, 61, under the action of the springs 64, automatically enter the holes 70 of the guide bars 71, reliably mechanically locking the switch 19 from self-rolling out under conditions of the inclination of the object in which the switch is installed. In the “pumped out” position, the carriage 32 with the cam plate 58, pressing the rotary lever 57 of the sensor 55 (see Fig. 7), gives an electrical signal about the position of the switch “pumped out” into the electronic control system. To start rolling in the handle switch 66, the locking mechanisms 60, 61 should be translated into the horizontal parts of the bayonet grooves 68, 69.

Thus, the implementation of the sliding device of the circuit breaker in the claimed form with the described distinctive features, namely:

- the control unit of the shutter in the form of a flat one-armed lever 14 of sheet material mounted movably with the first end 15 on the limb 16 of the side wall 3 of the device, and the second end 17 in the groove 18 of the spring-loaded curtain 10;

- symmetrically mounted on the side walls 3, 4 of the elastic conductive plates 29, the free console 30 of which are molded C-shaped with the possibility of interaction with the outer side surfaces of the switch;

- cam strap 58 of the screw mechanism in contact with electrical position sensors 54, 55, which are located on the bottom 1 of the housing;

- pin carrier 48, interacting with the figured groove of the mechanical position indicator 43;

- locking mechanisms 60, 61 from self-rolling, made at the front ends of the roller guides in the form described in the utility model formula, made it possible to achieve the goals set by the claimed utility model in terms of simplifying the design and improving the reliability of the device under external mechanical influences.

The described design of the utility model and a description of its operation indicate the compliance of the claimed utility model with the following set of conditions:

- the device embodying the claimed model, when it is implemented, is intended for use in withdrawable circuit breakers for large, up to 6300 A, currents and relates to electrical engineering, namely, to withdrawable devices;

- for the claimed design in the form as described in the stated utility model formula, the possibility of its implementation using the means described in the application is confirmed;

- a device embodying the claimed utility model, when implemented, is capable of ensuring the achievement of the technical result perceived by the applicant.

Prototypes of the inventive retractable device were manufactured and tested with positive results in the composition of the circuit breakers sliding design for high currents.

Therefore, the claimed utility model meets the condition of "industrial applicability".

Sources taken into account:

1. A. Luzyanin “Structure and principle of operation of the VA-45 PROxima series circuit breaker”. Journal "CONTROL ENGINEERING RUSSIA", No. 4 (64), 2016, p. 68-71.

2. Low voltage equipment. EasyPact MVS. Circuit breakers and switch-disconnectors of low voltage 800-4000 A. Schneider Electric catalog, 2015, p. A-12, A-13. http://stek35.ru/upload/iblock/d2e/EasyPactMVS.pdf

3 Low voltage equipment. EasyPact MVS. Manual. 2013. MVS08 N, p. 3, 4; pg. 14-15; p. 44, 49, 50, EasyPact_MVS_rukovodstvo_03-09.pdf (13.9 MB).

4. Siemens LV 30 2004. Catalog. Automatic devices / disconnectors of loading to 6300 A, SENTRON WL, page 5/8.

http://www.novec.ru/catalog/novosibirsk/catalog/siemens/sentron_wl.pdf

5. Description of the application US 2009/0000926 A1, H01H 9/20, H01H 9/22, publ. 01/01/2009.

6. Description of the patent CN 102386579 A, Н02В 11/24, НВВ 11/127, publ. 03/21/2012.

7. Description to patent KR 101217501 B1, Н02В 11/24, НВВ 11/02, НН Н 33/53 publ. 01/02/2013.

8. Description of the patent RU 2380783 C1, H01H 73/00, publ. 01/27/2010.

9. Description to patent RU 2416848 C1, НВВ 11/173, НОН 73/00, publ. 04/20/2011.

10. Description of the application US 2004/0129546 A1, H01H 3/40, publ. 07/08/2004.

11. Description of patent CN 104300410 A, Н02В 11/10, НВВ 11/173, publ. 01/21/2015.

12. Description of the patent KR 100876410 B1, H01H 71/08, H01H 71/10, publ. 12/31/2008.

13. ABB SACE catalog. Emax. Low-voltage circuit breakers for rated currents of 800-6300 A. Design features, page 1/7.

14. Description of the patent for utility model RU 75257, Н02В 11/28, publ. 08/27/2008.

15. Description of the patent RU 2276440, НВВ 11/28, publ. 05/10/2006.

Claims (1)

A sliding circuit-breaker device comprising a housing consisting of a bottom, a cover, two side walls molded from sheet material, and a rear wall of electrical insulation material with upper and lower leads, plug-in contacts closed by a movable spring-loaded curtain, a curtain control unit that interacts with structural circuit breaker elements, screw mechanism with a carriage for racking in and out of the circuit breaker, roller guides, self-locking mechanism, mechanical ind ikator of position and electric position sensors of the switch, characterized in that its shutter control unit is made in the form of a one-arm flat lever of sheet material mounted movably with the first end on the bend of the side wall of the device, and the second end in the groove of the spring-loaded shutter, the side walls of the case are equipped symmetrically from the inside installed elastic conductive plates, the free consoles of which are molded C-shaped with the possibility of interaction with the outer side surfaces of the switch the carriage of the screw mechanism is equipped with a cam plate in contact with electrical position sensors that are located on the bottom of the housing, as well as a pin carrier interacting with the figured groove of the mechanical position indicator, in addition, the self-locking mechanism is made on the front ends of the roller guides in the form of two spring-loaded cylindrical rods with handles mounted in vertical cylindrical holes, while the front ends of the guides are in the form of a semi-cylinder a coaxial vertical cylindrical openings, and the side surface of the half cylinders are provided with grooves closed bayonet-type opening into the cavity of the cylindrical holes, wherein the rods of the handle are placed inside the bayonet slots with possibility of vertical and horizontal translational movement of the rotary.

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