MXPA01007626A - Horizontally positioned, encapsulated high-voltage circuit breaker - Google Patents

Abstract

The aim of the invention is to provide a three-phase encapsulated high-voltage circuit breaker which is arranged horizontally, compact, and as low in height as possible and requires as little mounting space as possible. To this end the tubular circuit-breaker housing (11) has a connecting flange (14, 15) on each of its face ends for horizontally connecting a built-on housing and the control device is fixed to a mounting flange (21) positioned in the area of the outer jacket of the circuit-breaker housing. The circuit-breaker poles (41, 42) are supported on the outer jacket (10) of the circuit breaker via insulators (44, 45) and to this end configured as bushings for coupling elements (32) connected to the control device. The force travel path of a lever mechanism positioned downstream of one coupling element (32) passes via a deflection lever (33) arranged in the corresponding circuit-breaker pole (41). The internal structure of the above type of circuit-breaker is also suitable for mono-phase encapsulated circuit breakers.

Description

SWITCHING OF HIGH VOLTAGE POWER ENCAPSULATED IN A CONSTRUCTION FORM THAT LIES HORIZONTAL FIELD OF THE INVENTION The invention relates to the field of electrical power distribution, and is applied in the constructive conformation of an isolated high voltage power switch to the three phase encapsulated gas, in which inside a tubular-shaped switching box arranged horizontally lying next to each other three poles of power switching and in which is coordinated to the moving contact parts of the power switch poles a common drive installation, arranged outside the switch box.

The invention can also be applied in a single-phase encapsulated high power power switch. BACKGROUND OF THE INVENTION In a known three-phase encapsulated power switch, the three power switching poles are arranged in an oval or cylindrical box, side by side, either in a horizontal plane or at the ends of a triangle and each time fixed by means of a carrier cylinder of insulating material at a front end of the box. The three-phase branches are made by means of supports of the box, which are arranged in the jacket area of the box. The derivation of the first phase is arranged in a vertical plane, while the derivations of the two other phases are coordinated with it and form an acute angle open downwards. A tubular part is placed on each connection support that is surrounded by a current transformer, in which there is a separating switch, if appropriate, in combination with a ground switch. A free conduit guide is connected to this tubular part - the drive of the high voltage power switch is disposed at one end of the box, where a vertically running drive rod transmits a linear movement by means of a joint gear to a torsion shaft, which is coupled with other articulation gears with drive rods running horizontally. These drive rods are coupled to the movable contacts of the power switching poles (EP 0878 816 A2). In another known high-voltage power switch of the aforementioned type, the power switch poles are hung from the front ends of the commutation box by means of the phase conductors leading to the poles in the carrier insulators which rest on the connection supports arranged on the side of the sleeve. The phase conduits can be coordinated with current transformers, in which a connection support is applied directly to the basic part of the distribution, which carries three free air guide conduits, while in the other connection supports it is first used a construction box, which contains a separating switch and is equipped with a fast earthing system, as well as a voltage transformer (EP 0878 816 A2). In addition, a high-voltage, gas-insulated, three-phase encapsulated power switch of a stationary construction type has been proposed, in which each power switching pole consists of two pole pieces, which rest on the lower end and on the lower end. the upper end of the box by means of insulating supports in each time a carrier body. The insulating supports are constructed as tubes, where the tubes of the upper pole pieces are crossed each time by a drive rod. The drive rods joined at one end with articulated switching rods, are at their other end rigidly joined with cross-links which in turn are articulated to a drive lever. This drive lever is connected to a cam, which can be tilted by an impeller (DE 198 15 152 for single-phase, high-voltage encapsulated outdoor switching installations, it is also known a high voltage power switch in which in a tubular casing box placed adjacent, containing two interruption units, are coordinated on both sides by the front side connectable to the bases of the encapsulation carrying a current transformer. The movable contact of the corresponding interrupter unit rests on a hollow insulating cylinder in the jacket of the encapsulation box, where an insulating impulse rod passes through the insulating cylinder and is coupled to the impulse installation placed under the switch box (DE 29290054 Al). Starting from a three phase encapsulated high voltage power switch having a horizontally lying construction with the characteristics of the main idea of claim 1 (EP 0878 816 A2) the invention is established the task of shaping the commutator in such a way that in a compact construction with the lowest possible construction height, and require a support surface that is as small as possible. SUMMARY OF THE INVENTION In order to solve this task, it is provided according to the invention, that the two front side ends of the tubular-shaped switching box are each provided with a connection flange for the horizontal connection of a structure box In addition, the impulse installation is arranged on the sleeve surface of the commutation box and a mounting flange is fixed in the sleeve area of the commutation box, in addition, each pole piece of a commutator pole of power is fixed each time by an insulating support in the sleeve of the tubular-shaped switching box. And finally, the insulating supports for the partial pieces of pole containing the movable contact parts, are made as crossings for the coupling elements joined with the driving installation, which belong to the lever gear, also presents each lever gear a Two-link articulation lever, whose pivoting support is supported by means of the insulating support on the sleeve of the commutation box. This configuration of power switch, tries to vary as little as possible the tubular conformation of the switch box and the components coordinated to the power switch coordinate individual structure boxes, which are connected on the front side in the horizontal direction to the switch box . In this way, the height switch does not increase, which is favorable for maintenance work. The arrangement on the front side of the housing is linked to a pole-side bracket on the pole of the power switch, as well as to an arrangement on the sleeve side of the drive installation. The support on the sleeve side of the power switch poles is combined in such a way with the force transmission path of the lever gear or articulation of the delivery device, that the delivery device can be arranged below the box of switching and with this, none of the support surfaces of the switch box requires excessive space. The compact construction of the new power switch is supported by the two construction boxes arranged in the switch box, one of which opposes the switch box and has a second one coaxially arranged with a connection flange opposite to the switch box, formed in such a way that the second connection flange of one of the two construction boxes has at least one diameter that is smaller than the diameter of the flange of the first connection. This building box then serves as a transmission part from the relatively large outside diameter of the switch box to other building boxes, as a rule it can have a smaller outside diameter. At least one of the transmission parts can then be constructed as a basic part of the current transformer as is known from DE U 298 06 652. The support of the insulator supports in the jacket of the switching box, it is made for the partial pieces of pole containing the movable contact pieces in another embodiment of the invention, in such a way that these insulating supports rest on a crosspiece that rests in the area of the mounting flange on the sleeve the switching box. In order to be able then to coordinate the coupling elements of the lever connection, introduced through the insulating supports, a common impeller, are the coupling elements articulated below the mentioned cross-piece preferably in a yoke, which is connected by means of a Impulse bar with the drive device. In order to save as much space as possible in the articulation of the force flow from the coupling element that runs vertically on the horizontally moving drive rods of the movable contact parts of the power switching poles with the aid of the articulation lever With two arms, in another embodiment of the invention, the lever arm on the drive side of the articulation lever is coupled by an oscillatingly mounted coupling element in an axially-driven coupling element, which in the direction of movement of the movable contact parts is conducted in a sliding manner and is coupled to the movable contact part. In order to influence as little as possible the electric field inside the switching box by the gear of the lever, it is advisable for the intended purpose to construct each of the movable contact parts contained in the pole partial piece, as a box surrounding the articulation lever and the coupling element inserted axially and resting on the corresponding insulating support and on its wall the corresponding articulation lever is mounted. Such a box can be provided with an external contour that carries the desired value course of the calculation of the electric field. In high-voltage power switches, there are the two pole pieces of a power switching pole mechanically connected to one another by means of an insulating distance maintainer, formed by an insulating tube. In another embodiment of the invention, said insulating tube can be replaced by at least one bar that runs parallel to the axis of the pole partial pieces. This is possible because by the radial support of the partial pieces of pole in the sleeve of the distance maintainer box, only a carrier function is received in a minimum amount. The conformation of the distance maintainer, as one or two bars, favors a coordination on the opposite side of the poles of the power switch in a space as limited as possible. The conformation provided by the invention of the poles of the power switch and of the drive path, for the contact pieces, can also be applied in single-phase encapsulated power switches. Since in this case the switching box contains only one power switching pole, the use of a crossbar and a yoke can disappear in the drive path area. DESCRIPTION OF THE DRAWINGS Two embodiments of the invention are presented in figures 1-5. Here, FIGURE 1 shows a view of a three-pole power switch in which the path or force transmission path of the drive installation is represented.; FIGURE 2, a perspective view of two of the three power switching poles arranged in a switch box; FIGURE 3, a longitudinal section through the center power pole; and FIGURE 4, the coupling of the articulation lever mounted on a pole part on the bus of a power switching pole; FIGURE 5 shows a single-phase encapsulated power switch. DESCRIPTION OF THE INVENTION Figure 1 shows the view of a power switch, whose switching box 11 is partially cut to represent the drive path of the force transmission of a driving installation on the movable switching contact of a power pole. power switching. The commutator box 11 is formed in a tubular shape and is arranged in a frame 2. The commutator box arranged horizontally is provided at its two ends with protective flanges 14 and , in which a first housing 12 and a second housing 13 are joined to the flanges. The construction boxes 12 and 13 have first connection flanges 16 and 17 as well as second connection flanges 18 and 19 where the diameter d of the second connection flanges 18 and 19 is smaller than the diameter D of the first connection flanges 16 and 17. One or both of the building boxes can be constructed as current transformer bases, as is known from the German model document 298 05 944 U, and thus receive to the current transformer, being provided with secondary connections 20. The commutation box 11, is provided in the surface area of shirt 10 with a mounting flange 21 in which, the drive installation 22 is attached. This presents among others a gearbox 23 with a drive box 25 fixed in the connection bracket, in which a spring drive 26 is provided with a connection and disconnection spring. The spring drive 26 is articulated by a coupling rod which can not be seen very accurately with one arm of a two-link articulation lever 27. The other arm of this articulation lever is articulated by means of a link rod 28 a a lever 29 which rests on the hinge shaft 30 mounted on the gearbox 23. On this hinge shaft 30 a further articulation lever 29 'on which the bar is articulated is seated inside the gearbox. of drive 31 running vertically. This drive rod has, as will be clarified later by means of FIG. 2, a yoke 3 on which three coupling elements 32 running vertically are placed. Each of these coupling elements works on a corresponding drive rod of the three power switching poles arranged in the switch box 11. For this purpose, the corresponding coupling element 32 is articulated to an arm of a joint lever of two. arms 33, in which another coupling element 34 is articulated in the other arm 34. The coupling element 34 is oscillating with its "other end in a pole partial part 41 of a power switch pole, and there - as will be described later with reference to figure 4 - it is axially driven and articulated by means of a coupling element 35 axially directed to the driving rod 38 of a movable switching contact 6. According to figure 2, they are arranged in the box switching 11, in a horizontal plane, side by side, three poles of power switching 40, where in this figure only two switching poles are represented d Each power pole has a first pole piece 41 and a second pole piece 42, which are mechanically joined together by means of the insulating distance holder 43 in the form of insulating bars. In each pole part there is connected a current conductor 50 where for the passage from the pole part to a current conductor, L-shaped conductive parts 49 are provided. While the power switch poles are disposed one next to the another in a plane, are the current conductors 50 arranged in delta. The partial pieces of pole 41 and 42 rest on the jacket area of the switching box 11 by means of insulating supports 44, 45, which at their end on the high voltage side and at their end on the side of the box, are provided with a field control element 46 or 47. The insulating supports 44 for the first partial parts of pole rest on a cross member 48 which in turn rests in the area of the mounting flange 21 in the box switching 11. These insulating supports 45 of the second pole partial parts are each supported individually in the jacket area of the switch box 11. Here are both the partial pole pieces 41 and 42 as well as the insulating supports 44 and 45 as well as the control elements 46 and 47 constructed in an equal manner. In the arrangement of the poles of the triangle power switch, could be used in isolation supports and coupling elements of different length. The cross member 48 has coordinated yoke 3, which is located at the end of the drive belt 31. The yoke 3 carries the coupling elements 32, of which according to Figure 3, each extends through a insulating support 44 constructed hollow and is articulated to an arm of the articulation lever 33. The two-arm lever 33 is mounted by an axle 39 'to the wall 53 of the pole part 41 constructed in the form of a box. The other arm of the articulation lever 33 is hinged to an oscillating coupling element 34 which, according to FIG. 4, is mounted by bushings 52 in an axially-driven fork-shaped coupling element 35. The axially driven coupling element 35 rests on a sliding bushing 37 on a guide bar 36 which is fixed on the first pole piece 41 of the box type shape and extends horizontally inside this partial pole piece. . At the other end of the axially-driven coupling element 35 slidably disposed on the guide bar, the drive rod 38 is hinged, with which the movable switching contact 6 (see FIG. 1) of the switch pole of the actuator moves. power. Figure 3 further shows, in a clear manner, the insulating distance maintainer of the bar type 43, to which electrodes 52 with screen or armored are coordinated at their ends. The power switch according to FIG. 5 is constructed in principle in the same manner as the power switch according to FIGS. 1 to 4. The essential difference must be seen in that the switch box 60 only contains one pole. of power switch 61, whose pole pieces 62 and 63 are connected each time to a current conductor 64 that runs axially. For the support of the pole piece 62 on the sleeve of the switch box no cross-piece is needed, so that this support can be made in a similar manner to the support of the pole piece 63. Furthermore, no yoke for coupling the coupling element 32 to the drive rod (part 31 in figure 1).

Claims (13)

1. NOVELTY OF THE INVENTION Having described the invention as above, the contents of the following are claimed as property: CLAIMS 1. Three phase encapsulated high voltage power switch, in a constructive form lying horizontally in each of the three switch boxes tubular form there are poles of power switch placed next to each other consisting of two partial pieces of pole placed isolated with respect to the commutator box, of which one in the part of pole that stands isolated in the commutator box , carries the movable contact piece and the other piece of pole the contact piece that is fixed; wherein in addition to the movable contact pieces of the power switch poles a common installation arranged outside the switch box is coordinated, which inside the commutator box is coupled to the movable contact parts by means of a separate lever gear, and wherein in the area of the front ends of the commutator box, constructive boxes have been provided through which the current conduits are introduced to the poles of the commutator, characterized in that the two ends of the - The front side of the switch box each time is provided with a connection flange for the horizontal connection of a building box, and the drive installation is arranged on the sleeve surface of the switch box and is fixed to a mounting flange in the jacket area of the switch box, and each pole piece of a power switch pole is supported by means of an insulating support and n the sleeve of the tubular-shaped switch box and the insulating supports for the partial-pole parts containing the movable contact parts are constructed as transverse guides for the coupling elements of the lever gear attached to the drive installation, where Each lever gear has a two-arm articulation lever whose bearing for rotary movement rests on the sleeve of the switch housing by means of the insulating support.
2. 2. High voltage power switch according to claim 1, in which each housing has a first connection flange in front of the commutator housing and a second commutating flange opposite the commutator housing, characterized in that the second Connection flange of at least one of the two construction boxes has a diameter that is smaller than the diameter of the first switching flange and this construction box is built as the base of the current transformer.
3. 3. High voltage power switch according to claim 1 or 2, characterized in that the insulating support for the partial pieces of pole containing the movable contact parts are placed on a cross member that rests in the area of the mounting flange in the shirt of the commutator box.
4. 4. High-voltage power switch according to claim 3, characterized in that the coupling elements of the lever gear are articulated under the yoke to a yoke, which is connected to the driving installation by means of a drive rod .
5. 5. High voltage power switch according to claim 4, characterized in that each coupling element is articulated to a lever arm of the articulation lever of two corresponding arms and the other lever arm of the articulation lever is articulated by means of a coupling element oscillatingly mounted to an axially-driven coupling element, wherein the axially-driven coupling element is slidably guided in the direction of movement of the movable contact piece and is coupled to the movable contact piece.
6. 6. High voltage power switch according to claim 5, characterized in that each of the partial pieces of pole containing a movable contact part is constructed as a box surrounding the articulation lever and the coupling element driven axially and on its wall the corresponding articulation lever is mounted and supported on the respective insulating support.
7. 7. High-voltage power switch according to any of claims 1 to 6, characterized in that the parts of because it contains a fixed contact part are fixed in the same manner as the pole partial pieces containing a movable contact part. . The high voltage power switch according to one of claims 1 to 7, characterized in that the pole partial pieces of a power switch pole are mechanically connected to one another by means of an isolating distance maintainer, where the power maintainer Insulating distance consists of at least one bar that runs parallel to the axis of the partial pole pieces. 9. High voltage power switch according to claims 1 to 8, characterized in that in each pole piece there is a conductive part with which the passage is made from the current connections of the pole partial pieces to the guides or current supplies arranged in a triangle. 10. Single-phase encapsulated high voltage power switch in a horizontally lying construction, wherein the power switching pole "disposed inside a tubular switch box consists of two pole pieces arranged in an insulated arrangement with respect to each other. the switch box, of which one carries the movable contact piece and the other the fixed contact piece, wherein the movable contact part of the pole of the power switch has a coordinated drive arrangement disposed outside the switch box on its sleeve surface and fixed on a mounting flange, which inside the switch box is coupled to the movable contact piece by means of a lever gear, wherein at the ends on the front side of the box the switch is provided horizontally connected building boxes through which the guides or conduits of current are passed to the pole of the power switch Each pole piece of the pole of the power switch rests on the sleeve of the switch box of tubular shape, by means of an insulating support, where the insulating supports for the pole piece which contains the movable contact piece is constructed as a passage for a coupling element of the lever gear attached to the drive installation, wherein each lever gear has a two-arm articulation lever whose bearing for rotary movement rests on the the commutator case by means of the insulating support and wherein the coupling element is articulated to a lever arm of the two-arm articulation lever, while the other lever arm of the articulation lever is articulated by means of a coupling element mounted oscillating to an axially driven coupling element and the axially driven coupling element is driven e slidably in the direction of movement of the movable contact part and is coupled to the movable contact part. 11. High voltage power switch according to claim 10, characterized in that the pole part containing the movable contact part is constructed as a box surrounding the articulation lever and the axially driven coupling element, and the corresponding articulation lever is mounted on its wall and rests on the respective insulating support. High voltage power switch according to claim 10 or 11, characterized in that the pole part containing the fixed contact part is constructed in the same manner as the pole part containing a movable contact part. . 13. High voltage power switch according to claim 10 to 12, characterized in that the pole partial pieces of the power switch pole are mechanically joined to each other by means of an insulating distance maintainer, wherein the insulating distance maintainer consists of at least one bar running parallel to the axis of the partial pieces of pole.