CN1322043A - Three-phase bar-bar packing assembly for high-voltage apparatus - Google Patents

Abstract

In a tubular encapsulation (2), the three phase conductors (5, 6, 7) are fixed at one end of a common support insulator (3) and are insulated in the area between the two ends of the encapsulation The support of the support (8). In this case, the phase conductor has a tube (51) with a semicircular cross-section and is connected to the conductor insulation sleeve (33) of the common support insulator (3) via a connection piece (56). These connections can be cantilevered (61), especially if the phase conductors are offset radially outwards with respect to the axis of the insulation sleeves of the respective conductors.

Description

Encapsulation assembly for three-phase busbars for high-voltage equipment

The invention belongs to the energy subfield and is used in the structural design of encapsulated insulated high-voltage devices, in which two device components are electromechanically connected via a three-phase encapsulated busbar assembly.

In three-phase high-voltage installations, usually at least in the area of the busbars, parts of the three phase conductors are arranged in a common encapsulation. In this case, the phase conductors are parallel to the axis of the encapsulation housing and are always arranged in a triangle. The phase conductors are also supported individually or together in the encapsulation housing via at least one insulator (DE 2211987A1, DE 2364560A1). In the jointly supported variant, on the one hand, a support insulator is arranged between each phase conductor and the encapsulation, and on the other hand, another star-shaped multi-way support insulator is located between the phase conductors and connects the phase conductors. Supported on individual support insulators (DE2036270A1).

In a further three-phase power transmission device, the phase conductors are arranged next to each other in a common housing, wherein each phase conductor consists of two hollow profiled rods, which have a semicircular cross-section. In this case, the profiled bars have a conductor zone running through the circular diameter and a conductor zone running around the circumference. The two profiled bars complement each other to form a circular cross-section. However, individual profiled rods can also form the conductors of the phases. In this case, the phase conductors are arranged side by side in one plane (US2964586A, especially Figures 23, 24).

It is an object of the invention to arrange and design the phase conductors and the carrier insulator parts in such a way that simple installation possibilities are ensured in a structurally simple and insulatingly favorable construction.

In order to achieve the above object, according to the present invention, a packaging assembly for a three-phase packaging insulating busbar for high-voltage equipment is adopted, which has a tubular packaging shell with connecting flanges arranged at both ends and three parallel to it. The phase conductors arranged axially and triangularly in the encapsulation housing and at least one insulator supporting the phase conductors together on the encapsulation housing, wherein each of the three phase conductors is shared by a substantially cylindrical The support insulator of the insulating sleeve of the shaped conductor is equipped with one of the two flanges of the package case. Between the two ends of the package case, at least one insulating support for relatively supporting the phase conductor is provided. The phase conductor has a cross-section Semi-circular pipe piece with a conductor area running through the circumference and a conductor area running through the circle diameter, wherein the conductor area running through the circle diameter faces the axis of the encapsulation housing, the phase conductors are fixed on the flange side by connecting pieces The conductor insulation sleeve of the support insulator.

When the package is designed in this way, the carrier insulator, the phase conductors and the insulating carrier form a relatively stable and preassembled unit which is easily inserted into the package housing and can be fastened to a connection flange. Furthermore, providing the phase conductors with a tubular shape with a semicircular cross-section allows an optimal and insulating use of the space in the encapsulation, ie the inner diameter of the encapsulation is as small as possible. In a further refinement of the invention, this is achieved in that the planes of the phase conductors passing through the area of the circle diameter are offset radially outward relative to the axis of the respective conductor sheath. In this case, the conductor insulation sleeve of the support insulator is at a greater distance from the encapsulation housing than the phase conductors. For this purpose, it is proposed to form the connecting piece which accommodates the ends of the phase conductors in a cantilever-like manner and to connect it directly to the conductor sleeve of the carrier insulator. At their end facing away from the support insulator, the phase conductors are suitably provided with a connection piece with a slide for connecting the phase conductor to the insulating sleeve in the support insulator of the adjacent encapsulation assembly. Contact part of the contact.

When the package is relatively long, to be precise, when the length of the package is greater than 8 meters - 10 meters, the following measures are meaningful, that is, at least two of the phase conductors are also individually insulated on the package shell, for this purpose The carrier insulators used are of sliding design in a known manner. When the phase conductors arranged in a triangle are arranged in such a way that the upper phase conductor is arranged on the vertical axis and the other two phase conductors are arranged approximately offset by ±120° in the circumferential direction, it makes sense to support only the two phase conductors with additional insulation . In this case, the bottom area of the two lower phase conductor encapsulation housings and thus is farther away from dirt on the bottom, which may have an insulating effect.

Furthermore, the defined cross-sectional shape of the phase conductors means that the corresponding tubes need only be sawed and drilled in order to cut them to length and to form the required fastening zones. For this purpose, it is proposed to assign a flat section to each phase conductor in the region passing through the circumference, which is located opposite the region passing through the diameter of the circle and is provided with mounting holes.

The semicircular cross-section of the phase conductors can also be electrically reinforced for high rated currents such that each phase conductor is electrically reinforced in at least one longitudinal area by identical conductor sections arranged in mirror image, at their ends The conductor segments are equipped with electrode-shaped end pieces.

One embodiment of the novel packaging assembly is shown in the figure.

Figures 1a and 1b are longitudinal cross-sectional views of the novel packaging assembly.

Figure 2 is a cross-sectional view of a support disposed in the opposite side support phase conductor region.

Figure 3 is a cross-sectional view in the area of the auxiliary support of the two-phase conductors.

Figure 4 is a cross-sectional view of a portion of an electrically strengthened phase conductor.

FIGS. 1 a , 1 b show a shortened length of an encapsulation assembly 1 , the encapsulation housing 2 of which consists of a tubular central part 21 and two injection-moulded end parts 22 , 23 . Each end has a mounting flange 24 or 25 and is provided with a mounting hole 26 or 27 and another hole 28 or 29 for connecting a stylus or probe or a snorkel. On the flange 25 is arranged a support insulator 3 which generally consists of a rail insulator 31 provided with an axial channel 34 and an annular metal armature 32 . In the insulator 31, three conductor insulating sleeves 33 are embedded, which are provided with a central threaded hole. On the other end of the package housing assembly, a similar standoff insulator 4 is provided on the flange 24 . However, the standoff insulator belongs to an adjacent packaged component.

Three phase conductors 5 , 6 , 7 are fastened to the conductor insulation sleeve 33 of the support insulator 3 . Each phase conductor is formed by a tubular part 51 whose cross-section is semicircular as shown in FIGS. In this case, the three phase conductors are arranged in such a way that the plane a-a passing through the conductor region 53 of circular diameter faces the axis A of the encapsulation 2 . The three phase conductors 5 , 6 , 7 are arranged in a triangle, wherein the phase conductor 5 is arranged symmetrically above the two phase conductors 6 , 7 .

Within the enclosure, depending on the length of the enclosure, at least one support 8 is arranged between the three phase conductors, which supports the phase conductors and insulates them from each other. The carrier serves, on the one hand, for the mechanical stabilization of the assembly and, on the other hand, to absorb the forces that occur between the phase conductors in the event of a short circuit. The support 8 , as shown in FIGS. 2 and 3 , has three cylindrical support regions 81 , 82 , 83 which are arranged in a star shape and which are injection-moulded in one piece from casting resin. In this case, the bearing area is equipped with stiffening ribs 84 and is optimized by high-pressure technology.

In the case of longer enclosures, especially longer than 10 meters, as shown in FIG. 3 , it is advisable to support the phase conductors 6 , 7 on the enclosure by means of insulating supports 9 in addition to a plurality of supports 8 . In this case, the support 9 is suitably provided with a sliding plate 91 as described in German laid-open documents 19502665, 19517591.

As shown in FIGS. 1 a , 1 b , the phase conductors 5 , 6 , 7 are fastened not only to the support insulator 3 but also to the opposite support insulator 4 in a special manner. In the case of the carrier insulator 3 , a connection piece 56 is used for each phase conductor, which has a cantilever-shaped region 57 and a foot-shaped connection region 58 . One end of the phase conductor with a conductor region passing through the circular diameter is located in the cantilever-shaped region 57 and is fastened by a screw which can be mounted through the mounting hole 55 . At the other end of each phase conductor there is provided a connecting piece 60 which is designed in the same way as the connecting piece 56, but which is also equipped with a contact part 62 of a sliding contact for connection to the support insulator, whose bushing The counter contact point 41 is fastened to a corresponding conductor insulation sleeve 42 of the carrier insulator 4 .

In FIG. 1 b it is also shown for the phase conductors 5 that the individual phase conductors can be electrically reinforced by means of one or more conductor segments 70 whose cross-sections are designed like the phase conductors and opposite to the phase conductors. Arranged as a mirror image. In this case, upper pole-shaped end pieces 73 , 74 are mounted on the ends of the conductor segments 70 . It is likewise possible to integrate the end piece 73 into the connecting piece 56 . In the case of such a reinforcement of the phase conductors, the two conductor parts shown in FIG. 4 are provided with a mounting thickening 72 and are screwed together in the region of the mounting thickening.

Claims (8)

1. A package assembly (1) for a three-phase package insulated busbar for high-voltage equipment, which has a tubular package shell (2) with connecting flanges (24, 25) arranged at both ends and three Phase conductors (5, 6, 7) arranged parallel to their axes and in a triangular shape in the encapsulation housing and at least one insulator (3) supporting the phase conductors together on the encapsulation housing, is characterized in that one of these A support insulator (3) common to the three phase conductors (5, 6, 7) and equipped with a substantially cylindrical conductor insulation sleeve (33) is provided to one of the two flanges of the encapsulating casing (2) , Between the two ends of the package shell (2), at least one insulating support (8) for supporting the phase conductors (5, 6, 7) is arranged oppositely, and the phase conductors (5, 6, 7) have a transverse A tube (51) with a semicircular cross-section having a conductor region (52) passing through the circumference and a conductor region (53) passing through the circle diameter, wherein the conductor region (53) passing through the circle diameter faces the encapsulation housing Axis (A) of (2), the phase conductors (5, 6, 7) are fixed on the conductor insulation sleeve (33) of the support insulator (3) on the flange side via the connecting piece (56). 2. The packaging device according to claim 1, characterized in that the insulating support (8) is designed in the shape of three arms (81, 82, 83). 3. The encapsulation arrangement according to claim 1 or 2, characterized in that at least two of the phase conductors (6, 7) are additionally separately supported (9) insulatively on the encapsulation housing (2). 4. The encapsulation arrangement as claimed in one of claims 1 to 3, characterized in that the connection piece (56) is designed to accommodate the ends of the phase conductors (5, 6, 7) in a cantilever-like (57) manner. 5. The encapsulation device according to claim 4, characterized in that the phase conductors (5, 6, 7) are provided with a connecting piece (60) on the end facing away from the support insulator (3), the connection The part has a contact part (62) of a sliding contact for connecting the phase conductor to the carrier insulator (4) of an adjacent packaged component. 6. The packaging device according to claim 4 or 5, characterized in that, the plane (a-a) of each phase conductor (5, 6, 7) conductor region (53) passing through the circle diameter is opposite to each conductor insulation sleeve (33 ) are staggered radially outwards. 7. The encapsulation device as claimed in one of claims 1 to 6, characterized in that each phase conductor (5, 6, 7) in at least one longitudinal region passes through identically shaped conductor segments (70) arranged in a mirror image To obtain electrical reinforcement, the conductor segments are provided with electrode-shaped end pieces (73, 74) at their ends. 8. The packaging device according to any one of claims 1-7, characterized in that the phase conductors (5, 6, 7) are each provided with a flat portion (54) in the conductor area (52) passing through the circumference, The flat part is located on the opposite side of the area (53) passing through the circle diameter and is opened with a mounting hole (55).

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