Junction module for switchgear components

FIELD: electrical engineering.

SUBSTANCE: proposed junction module has independent connecting member inserted in jacks which are connected to modular members incorporated in operating and protective equipment of transformer substations and power distribution systems. Each connecting member has external flexible shroud accommodating conducting ring wherein plurality of conducting parts are installed and passed through ring channels. Mentioned conducting parts are assembled in bundle for its axial displacement and turning in ring which makes it possible to wire and connect them to respective contact leads provided in jacks and related to each of adjacent members.

EFFECT: eliminated leakage of protective gas during junction due to reliable sealing and insulation of joint.

6 cl, 7 dwg

 

The subject of invention

The present invention relates to a connecting node for electrical switchgear, in particular to the coupling elements or modules of the electrical switchgear intended for use in power distribution systems and transformer stations, which for docking or relations between elements is used independent of the connecting element, which as an intermediate part is put in a separate slot provided for this purpose in each of the elements and a conductive pins that you want to connect.

The subject of the invention is a docking system or connecting node between the elements that are part of the working and protection equipment systems power distribution and transformer stations, characterized in that a direct coupling or connection is to constantly maintain the mechanical integrity and electrical isolation connection, and thus to prevent leakage of the protective gas, which is typically used in this type of equipment, during operation of the connection or connections.

Background of the invention

In European Patent No. 0520933 describes a docking system for joints and modules switchgear transformer and similar stations, where each of the modules or elements has corresponding slots, which together with the sealing gasket to form a tight coupling, with each slot in the lower or inner part has a hole for fixing the contact output.

Moreover, in this European Patent, described as with each pair of slots located opposite each other and correspond to the two adjacent modules, interacts, as an intermediate part, the insulating housing having the shape of a truncated with two sides of the cone, the inner part of which is a metal tube, into which is inserted a lot conductive pin details intended for docking of the contact pins of each element. The above electrically conductive pin part shrink around the contact terminals by means of springs or rings located on their periphery.

Between conductive parts and the metal tube located within the outer insulating housing, is a series of elastic bands that allow some lateral mobility of these conductive parts to prevent possible errors of alignment between the contact pins as in the case of offset joined nests, and the elements themselves.

Description of the invention

In the proposed obedinitelem site for elements of the electrical switchgear first improvement is that conductive parts installed in radial channels made in the conductive ring, the outer diameter of which essentially corresponds to the inner diameter of the outer insulating housing. A beam of electrically conducting components secured within an insulating housing due to the good contact between the aforementioned conductive ring and the case, however, there is a possibility of rotation, so that the above-mentioned beam of electrically conductive parts can move radially for mating with the contact pins inside the slots, even when they are not aligned.

Conductive parts have a Central groove length less than the width of the channel in the ring, which is inserted each electrically conductive item, allowing radial movement of the latter inside the ring when connecting node docked with the appropriate contact output. The above electrically conductive parts are pressed against the ring's circular springs, preventing any movement in the longitudinal direction, which may result in the loss of these conductive parts.

Another improvement consists of the fact that the outer insulating housing of the connector is made of elastic material, having a great capacity for deformation which allows him to adapt to the corresponding ports in case of deviation from the aligned position, and, thus, ensuring optimum mechanical seal between the coupling element and sockets.

Moreover, it can be noted that within the above-mentioned elastic body are two metal tubes mounted on each end of the case, provide some rigidity to the chassis for a good seal with the slots. The inner tubes have a smaller length than the casing, and thus leave the Central portion for mounting electrically conductive ring containing electrically conductive parts. These internal hard metal tube flexible body make it impossible for a strong mismatch between the elastic body and the slots due to excessive deformation of the body, which can be caused by improper mounting of the socket, and which increases the probability of existence points to the lack of contact between the sockets and the housing, and thus creating a bad sealing capabilities.

Another enhancement of the connecting node assumes the cap which is aligned with the slots in the case, when the electrical connection is not necessary. A cap is provided for sealing and electrically isolated occlusion of the socket and the contact located in the lower part.

The improvement of the cap is to achieve good mechanical the civil and electrical insulation, and is used for this design, similar to the above connecting element, with the body of insulating material and an inner metal Cup. This glass provides electrical contact, and a certain rigidity, which, together with the elasticity of the outer casing ensures a good seal.

In addition to the aforementioned metal glass contributes to the creation of ravnoapostolnogo space inside the cap that prevents partial discharge. In the bottom part of the above glass has a hole through which passes a small ledge of a semiconductor material that comes in contact with the output of the corresponding element and causes the cartridge to the same potential, which is the connecting output. This ledge should be made of flexible material, to compensate for possible changes in length and, thus, to ensure good electrical contact.

The above cap is equipped with the second metallic glass, which together with the inner Cup is capacitive divider, and through the metal terminal external of the glass you can connect the probe to measure the voltage on the bus.

A further improvement consists in the fact that three of the nest element is merged with what omashu three-phase metal plate, acting as a screen that redirects the electric field in the slot and thus prevent its concentration at the periphery. Three phase plate mounted in the socket, has a slight bend which directs the electric field through the interior of the socket.

Brief description of drawings

For a more complete understanding of the present invention, in accordance with the preferred example of its practical implementation, the following is a detailed description of the invention with reference to the accompanying drawings, on which:

Figure 1 depicts the site, which includes third connecting element intended for mating with the corresponding socket;

figure 2 - cross section of the coupling element, and a side view in section of two nests, subject to the dock, as well as the associated contact pins;

figure 3 is a front view of a conductive ring that is inserted semiconductor part, coaxially mounted within the outer elastic casing;

figure 4 is a view in section of the cap, intended for installation on a socket, in accordance with a variant embodiment of the present invention;

figure 5 is a front view of the cap shown in the previous figure;

figure 6 is a top view of three nests of one element combined with crehpa the Noah of the metal plate;

figure 7 - cross section of a three-phase metal plate depicted in the previous figure, as well as appropriate slot.

The preferred embodiment of the present invention

Each independent coupling element, shown in figures 1 and 2, for its connection with two consecutive slots, contains elastic insulating housing (1) in the form of truncated on both sides of the cone within which is inserted a pair of metal tubes (2). Their total length is less than the length of the housing (1) and leaves the staging area for the installation of conductive rings (3), having a set of radial channels (4), in which the inserted pin electrically conductive parts (5). Their total outer diameter, and the diameter of the above-mentioned conductive ring (3), is equal to the inner diameter of the elastic body (1), ring (3) is fixed in the Central part of the housing (1), and inserted between the ends of the metal tubes (2) inside the housing (1). The beam formed of various conductive parts (5)connected and installed in radial channels (4) conducting rings (3), firmly held directly inside the elastic body (4) via the exact contact between the ring (3) and the inner surface of the housing (1). However, there is a possibility for conducting detail what she (5) to rotate relative to the housing (1), so this construction can be shifted radially and are connected to the contact pins (6)located inside the appropriate slots (7), even when they are not aligned.

These conductive parts (5) have a Central groove (8)which provides the location of each conductive parts (5) in the respective channels (4) conductive ring (3). And, thus, permitted radial offset these conductive parts (5) when connecting the design will meet with the relevant conclusions, despite their deviation when the conclusions are not aligned.

When conductive parts (5) are installed in the desired position in the ring (3)and the corresponding spring (9) cover or installed on the outer periphery at the ends of the details of these conductive parts (5), they will be held tightly against the ring (3) and any shift in the longitudinal direction is impossible that prevents their loss.

As the metal tubes (2)which is inserted into the elastic body (1), they are designed to provide a certain rigidity, which ensures a good seal with the slots (7).

As for the cap, shown in figures 5 and 6, intended for installation in a slot (7) in the case where electrical connection is no heart and soul is on, the above cap hermetically closes the socket and electrically isolates the contact pin located in the lower part. It should be noted that to achieve good mechanical integrity and electrical insulation, above the cap, indicated in General position 10 has a configuration similar to the previously described connecting element. Thus, the insulating housing (10) so as flexible and provided inside the metal sleeve (11) which establishes electrical contact, and which provides a predetermined rigidity, which, in combination with the elasticity of the outer surface of the cap (10), ensures good air tightness.

In the lower part of the above-mentioned glass (11) is provided with an opening through which passes a small ledge (12) of a semiconductor material that comes in contact with the o (6) element lead glass (11) and the space inside it to the same potential, which is output. The ledge (12) must be made of flexible material, to compensate for possible changes in length and to ensure a good connection with the corresponding contact output.

Moreover, the cap (10) on its outer side contains a second metal Cup (13), which, together with the above-mentioned glass (11)is capacitive divider, which through the metal terminal (14) outer Cup (13) allows you to connect the probe to measure the voltage on the bus.

Above the cap (10) is fixed on the element, in the closed position by means of a flat metal plate (15), which has a pair of oval holes (16) for screws or other suitable fastener means.

As for the slots (7) as such, are installed on the corresponding element, it is seen that three nests of one element, as shown in figure 6, are connected three-phase metal plate (17), which acts as a screen and weakens the field in the slots (7), preventing the concentration of the above fields on the periphery. The above three-phase metal plate (17) are mounted in the socket (7) and integrate them directly in the forming process, and is attached to the element by welding around its perimeter. Above the plate (17) also has a slight curve (18) in the part, which is embedded into the corresponding socket (7), the guide of the electric field inside the slot.

1. The connecting node for the elements of the electrical control devices used for the modular elements of the working and protection equipment in transformer stations and power distribution systems designed to ensure mechanical ger is lichnosti and electrical insulation, including independent coupling element made with the possibility of introducing in socket, pre-connected to the electrical distribution device and having respective contact pin, with independent coupling element includes a bundle of conductive parts for mating with the contact terminals of the sockets, and means allowing displacement of the conductive parts for when a contact pin are not aligned, while in the case when there is no need for electrical connection, a cap joined with the socket for electrical isolation of the contact output, characterized in that the independent coupling element comprises an outer casing (1)made of elastic material, inside and partially outside of which is provided the semiconductor to ensure better regulation of the electric field; a pair of metal tubes (2)whose total length is less than the length of the outer housing (1)located in an external enclosure around the edges so that provided free space in the Central part of the external casing (1); a beam of electrically conductive parts (5), coaxially fixed in the respective channels (4) in a metal conductive ring (3), inserted in the outer casing (1)with a conductive ring (3) p is Solorzano in the Central part between the ends metal tubes (2), firmly retaining ring (3) in the housing (1), and between conductive parts (5) and the metal tubes (2) there is sufficient space for a specific rotation of a beam of electrically conductive parts (5) for the possibility of displacement, when the joined contact pin (6) are not aligned.

2. Connecting node according to claim 1, characterized in that elektroprovoda parts (5) made the Central groove (8), the height of which is smaller than the height of the channels (4)made in the conductive ring (3), which leaves a free space between conductive parts (5) and the inner surface of the tubes (2) and allows radial movement of these conductive parts (5) within the conductive ring (3)when adjusting the contact pins and rotate the above-mentioned conductive parts (5) inside the housing in cases where the contact pin are not aligned.

3. Connecting node according to claim 1 or 2, characterized in that on the outer parts of the conductive parts (5) the springs (9), clamping the bundle of electrically conductive parts (5) to the conductive ring (3), which, together with the grooves in the conductive parts (5) prevent the displacement of the conductive parts (5) in the longitudinal direction and, therefore, their loss.

4. Connecting node according to claims 1-3, the best of the decomposing those the cap (10) comprises an outer insulating body made of an elastic material, on the inner and outer surface of which is provided semiconductors for better regulation of electric fields, and contains an inner metal sleeve (11), which provides the desired stiffness and tightness in combination with the elasticity of the housing cap (10)with the above metal Cup (11) provides ravnoapostolnogo space inside the cap (10), preventing partial discharge in its lower part is made with an opening through which passes a small ledge (12)made of a flexible semiconductor material included in contact with the corresponding contact output and cause the Cup (11) and the inner space to the same potential, which has a contact pin, ensuring good contact with the corresponding output.

5. Connecting node according to claim 4, characterized in that the cap (10) on its outer part has a second metal Cup (13), which together with the inner sleeve (11) forms a capacitive divider, allowing you to connect the probe to measure the voltage on the bus using a metal terminals (14), which is connected with an external glass (13), while above the cap (10) is provided with a flat metal plate (15) with slip the practical holes (16) for sealing attachment to an item of electrical switchgear.

6. Connecting node according to claim 5, characterized in that the three socket (7) of one element combined with the three-phase metal plate (17), directly clamped in the socket (7) and has a slight curve (18) to redirect the electric field inside the slot (7), and three-phase metal plate (17) United jacks (7) directly in the forming process.



 

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