RU191299U1 - Crossover point for cable line with two service sites - Google Patents

Abstract

The utility model discloses a transition point, which includes a support, two service sites located at different levels above the ground, on the top of which there is primary power electrical equipment that provides the ability to connect cable and overhead lines, while installation is provided on the lower platform secondary equipment. The technical result of the utility model is to ensure the placement of primary and secondary electrical equipment on sites installed on the multifaceted support of the transition point while ensuring convenient maintenance of this equipment. 9 s.p. f-ly, 1 ill.

Description

The technical field to which the utility model relates.

The utility model relates to electrical engineering, in particular to power lines, and more particularly to transition points of power lines.

State of the art

A transition point is known from RU 57324, consisting of a transmission line support equipped with traverses for hanging wires of a power line, cable sleeves for organizing cable entries, surge arresters and cable runs. The presence of surge arresters prevents the negative impact of short-term overvoltages on equipment connected to the cable part of the power line.

The disadvantage of this technical solution is the lack of sites for placement and subsequent maintenance of equipment.

Utility Model Disclosure

The technical problem that the utility model is aimed at is the provision of electrical and electronic equipment at the transition point and the possibility of convenient maintenance.

The solution to the technical problem is achieved thanks to the transition point, which includes a multi-faceted steel support and two service platforms installed on the support at different levels above the surface of the earth, while the upper platform serves to accommodate the primary electrical equipment that provides the connection of overhead and cable lines, while on the lower platform provides for the placement of secondary equipment. There is also a hard-surfaced platform at 0,000 m for support for operating personnel and a mobile laboratory.

On the upper platform, which contains the primary electrical equipment, a fence is provided, made from the edge by six steel arcs from the pipe. The arcs are located in a vertical plane and are attached to the barrel of the support. The arcs are located in space from the floor of the service platform to the traverse and cover all power equipment, forming a sphere. At half the height of the arc, the distances between the arcs are filled with a mesh fence, which prevents elements of failed equipment from falling outside the structure in order to protect the population and the environment.

The floor of the upper platform is mesh. To exclude the influence of precipitation on winter operation and reduce the level of electromagnetic fields, all equipment, with the exception of disconnectors, is placed on metal racks.

Lifting from the upper service platform to the installation site of the disconnector is carried out by a ladder located outside the support shaft.

To prevent personnel from rising to the upper platform with the disconnector turned on, an electromagnetic lock is provided to block the door.

A translucent fence is made on the lower platform along the entire perimeter, the height of which reaches the level of the upper platform. The fence has removable elements for performing maintenance work on electrical equipment. The floor is provided from slatted flooring to prevent the accumulation of rain.

Hatches for lifting equipment and materials are provided on the floor of both service areas. Ascent to service sites is carried out by stairs through the support body. Three supports were made in the support: one for directly entering the internal space of the support from a mark of 0.0 m and two for transitions between service areas and a staircase. The staircase has platforms of trellised flooring at the levels of the lower and upper service platforms, also equipped with hatches.

The technical result of the utility model is to ensure the placement of primary and secondary electrical equipment at different sites of the transition point while ensuring the possibility of convenient maintenance of this equipment.

Brief Description of the Drawings

In FIG. 1 shows a general view of the transition point.

Utility Model Implementation

Next, with reference to the accompanying figure, one of the possible embodiments of the utility model is described. In FIG. 1 shows an example implementation of a strong point in accordance with this utility model. The multifaceted steel support 1 is equipped with a traverse 7 with insulators. In FIG. 1 shows an insulator 8, which is in this case suspended and connected to a wire 9 of a power line. A disconnector 2 is connected to the wire 9 of the power line through other wires and / or tires, which, in turn, is connected to the cable sleeve 5 by additional wires and / or tires. The cable sleeve 5 is connected to the cable 6, which goes down to the ground along the support and then goes into the ground 11.

The disconnector 2 is an electrical switching device, which provides the closure and opening of the connecting contacts as a result of movements of the make contact caused, for example, by the drive of the disconnector. Thus, the disconnector provides connection or disconnection of the wire 9 of the power line and cable 6 through the intermediate connecting wires and / or busbars and / or other elements and equipment of the transition point. The connection of the wire 9 and cable 6 is necessary for the transmission of electricity from the air section of the power line to the cable section or vice versa.

For example, in FIG. 1, it is shown that an optical current transformer 3 is installed, which measures the current flowing through the disconnector 2. The measuring element of the optical current transformer can span a current-carrying bus through which current flows through the disconnector. The measuring element contains a sensitive optical fiber in a quartz tube, which registers the magnetic field generated by the current flowing through the bus and, therefore, through the disconnector. The measurement data of the optical current transformer obtained from the optical fiber and, if necessary, additionally processed, can be transmitted to the control center.

Based on these data, the control unit can control the operation of the disconnector. Due to the presence of an optical current transformer in the transition point, the cable line and electrical equipment connected to or included in the power line are protected from current surges, including long ones, in the power line caused, for example, by short circuits in the cable section.

In some embodiments, the organization of selective automatic re-activation of the cable-overhead line can be carried out by placing optical current transformers, a complete electronic optical unit, an optical converter to provide the required data transmission distance over a dedicated FOCL channel to 110 kV substation switchgears.

The equipment can be installed on special sites of the transition point, made directly on a multifaceted support. Optical current transformers can be installed in the jumper between the disconnector and the arrester with cable termination. The electron-optical block of the current transformer can be placed in the climatic cabinet of the secondary equipment. Data from the electronic optical unit of the optical current transformer can be transmitted to the relay protection devices at an adjacent substation to block automatic restart when a short circuit occurs in the cable section. Data in relay protection and automation devices can be transmitted via FOC. FOCL can be organized using optical fiber.

An overvoltage limiter 4 is connected to the cable sleeve 5 in the polymer housing 10, designed to limit short-term overvoltages, which are voltage surges. Such overvoltages can occur, for example, as a result of lightning discharges to or near the power line, including to the air section of the power line and / or transition point. The presence of a surge suppressor reduces the impact of short-term power surges in the power line on electrical equipment connected to or included in the power line.

Power electrical equipment of the transition point, which includes a disconnector 2, an optical current transformer 3, a surge suppressor 4 and a cable sleeve 5, is located on the upper platform 14. This site can be limited by arcs 15 connecting the platform 14 and the support 1, and the fence. Monitoring (tracking and controlling) and communication equipment 18 can be placed on the lower platform 16, installed preferably under the platform 14 for power equipment. The lower platform may be enclosed by walls 17.

Both service platforms are preferably located above the ground surface (ground) 11. In order for personnel to get to the installed platforms 16 and 14, doors 13 can be provided in the support 1, between which inside the support 1 can be provided a ladder for lifting. Due to this, personnel can enter the support 1 through the lower door, climb the stairs to the middle or upper door and exit to the lower or upper platform, respectively.

Monitoring the operation of the transition point is to monitor the operation parameters of the equipment of the transition point and / or control its operation.

In one of the possible options for implementation, the lower production site, which houses the secondary (monitoring and communication) equipment, is located at +5.0 m. At the level of +7.5 m, the upper site, which houses the primary (power) electrical equipment (disconnectors, current transformers, surge arresters, cable joints). Platforms are placed on the trunk of a multifaceted support. The rise to both sites is organized inside the body (trunk) of the support. The upper platform is equipped with a protective mesh fence that prevents electrical components from falling down in the event of an emergency and prevents personnel from falling from a height, as well as ensuring the safety of electrical equipment.

The support 1 is preferably mounted on the base 12, which can be made in the soil 11, and can partially extend outside the soil, as shown in FIG. 1, or may be placed on the surface of the soil. All connections indicated in this utility model are, by default, electrical connections and can be made either directly or through conductors, busbars, connectors or through other equipment. In addition, in some cases, a connection, in addition to an electrical connection, may also mean a mechanical connection.

In FIG. 1 shows an example of a transition point, in which an insulator 8 is connected to the wire 9 of the air section of the power line and one disconnector 2 and then with one surge suppressor 4, one cable sleeve 5 and one cable 6, as well as one optical current transformer 3. However modern power lines mainly transmit three-phase voltage, and therefore several identical elements can be placed on site 14, including those of the above (including several sets of such equipment). In those cases when there are many elements in the strong point indicated in the singular formula as a feature of the present technical solution in the singular, such a feature is also considered used, since many elements also include one element.

The above described embodiment of the utility model is presented for the purpose of explaining the utility model in detail and is not intended to limit the scope of protection defined by the following utility model formula. The presented options can be used in any combination or separately depending on the requirements for the object in which the utility model is used.

Claims (10)

1. The transition point of the cable-overhead power line, which includes a multifaceted steel support with two service platforms fixed on it: the upper one for placing primary equipment for connecting the overhead and cable lines, as well as the lower platform with secondary equipment placed on it. 2. The transition point according to claim 1, characterized in that the upper service platform is equipped with a fence made from the edge of six steel arcs from the pipe, located in a vertical plane from the floor of the service platform to the traverse, while the distances between the arcs are filled with a mesh fence to half the height arcs. 3. The transition point under item 1, characterized in that the floor of the upper platform is a mesh flooring. 4. A transition point according to claim 1, characterized in that a translucent fence with removable elements is made on the lower platform along the entire perimeter, the height of which reaches the level of the upper platform. 5. The transition point under item 1, characterized in that the floor of the lower platform is made of trellised flooring. 6. The transition point under item 1, characterized in that the service areas are equipped with hatches for ease of installation and maintenance of equipment. 7. A transition point according to claim 1, characterized in that a ladder is installed outside the support shaft, extending from the floor level of the upper platform to the disconnector for its maintenance. 8. The transition point according to claim 1, characterized in that a staircase is placed inside the support, and openings are made in the support for entering the interior from ground level and for passing between the platforms and the stairs. 9. The transition point under item 1, characterized in that the sites are located at different levels. 10. The transition point under item 1, characterized in that both sites are located above the surface of the earth.

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