ES1075987U - High voltage isolated coupling device (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Isolated high-voltage coupling device, applicable at a point of connection between at least one conductor and electrical equipment, and comprising: At least one insulating body (8) externally provided with a first conductive layer (12) and internally, at least partially, with a second conductive layer (13), characterized in that it comprises a first connection end (2) that can be coupled to a male electrical connection bushes (10) of the electrical equipment (6), the device comprising a second connection end (3) frustoconical that can be coupled to a female coupling connector (14) of a conductor (5) and the device comprising a measurement, control and protection means (7) comprising at least one conductor terminal (15) that can be electrically connected to the conductor (5) and the electrical equipment (6), where said means of measurement, control and protection (7) it can be housed in a third connection end (4) comprising the device. (Machine-translation by Google Translate, not legally binding)

Description

High voltage insulated coupling device.

OBJECT OF THE INVENTION

The invention relates to an application coupling device at a connection point between a conductor and an electrical equipment, so that the use of the coupling device allows the installation of at least one measuring, control and protection means regardless of type of conductor connector that exists in the installation, maintaining the same connector existing so far.

BACKGROUND OF THE INVENTION

The electrical equipment or high-voltage cells used in electrical power distribution facilities, for maneuvering and / or protection of the electrical network, are composed of different compartments, such as the network cable compartment. In this compartment you can receive the supply cables or they can be output to other distribution facilities. At the end of these cables there is a connector that allows an electrical connection, in an isolated and shielded way, between the cable and the electrical equipment.

The installation of the connectors in the supply or output cables is carried out in the field, since the cables are installed previously. Generally, the connectors are of the angled type (asymmetric connector) or T-connectors (symmetric connector). These connectors allow a cable connection to be made with a high degree of protection (insulated and shielded), and in the case of T-connectors, simultaneously supply voltage and current values at the point of connection with the electrical equipment. Basically, this type of connections includes an inductive toroidal sensor for intensity measurement, a resistive / capacitive sensor for voltage measurement and a shielded connector. The intensity and voltage signals are conditioned and processed in an electronic data acquisition system for protection, measurement and / or control. In this regard, some examples of Patent that refer to this type of connections with T-connectors can be cited:

Patent Application US20110025342A1 deals with a T-connector that can be connected to a bushing of an electrical equipment through its first open end. Likewise, the connector may be connected by its second open end to a device or said second open end may be isolated by a plug. Its third open end is configured to receive a power cable and a voltage pick-up point is also provided on this third end of the connector.

International Patent Application WO02080308A2 also refers to a connection system by means of a T-connector, which allows current and voltage to be captured at the same connection point between the cable and the electrical equipment. The system comprises an inductive toroidal sensor for intensity measurement, a resistive sensor for voltage measurement, a shielded connector, a fixed connection base (electrical equipment bushing) and electronic signal acquisition equipment. The current sensor is supported on the fixed base of the connection, and the voltage sensor is integrated into the detachable T-connector, specifically at one of its open ends, without modifying the characteristics of the high-voltage connection.

In a distribution installation under construction, if you need to install a current / voltage sensor at the connection point between the cables and the electrical equipment or cells, in the same construction phase of the installation you can install T-connectors that allow to include a current / voltage sensor. The sensors or sensors are installed in the field once the cable connectors are installed, that is, the sensors are installed, adjusted and checked on site, so that installation errors of the sensors can occur.

In an existing distribution installation and in field operation, where the cables are connected to the electrical equipment through elbow connectors (asymmetric connectors), in case it is necessary to install a current / voltage sensor at that point of connection, it is inevitable to replace said asymmetric connectors with symmetrical connectors that allow voltage / current sensors to be installed. These tasks are carried out in the same field installation, which entails certain inconveniences, such as complex installation tasks that can increase the likelihood of assembly errors, increased costs, as well as a longer installation re-establishment time. In addition, since the voltage / current sensors are installed, adjusted and tested in the field, installation errors of the sensors can occur due to improper wiring of earth meshes, polarities, etc.

US Patent US6031368 refers to a connection device between insulated cable connectors, said connection device comprising the possibility of including a capacitive voltage sensor in its third open end. In short, the connection device is a voltage sensor that replaces an independent connector element (bitronco-conical configuration) that is housed by plug, as an intermediate piece, in insulated connectors, thus obtaining the connection between both connectors. The connection device, manufactured as a molded body of insulating material, comprises a first bitroncochonic configuration part provided with male type connection elements and a second part provided with an open end that extends perpendicular to the first part. This open end is what allows sensor installation. This connection device is installed as a second element in a connection between cables and electrical equipment, that is, a T-connector is first connected to the bushing of the cell or electrical equipment and then said connection device is connected to the T-connector to include a sensor, another connector can be connected to the connection device, thus establishing a connection between cable connectors. Therefore, this connection device is installed in the field, so it cannot be adjusted and tested at the factory together with the electrical or cell equipment, which supposes the problems mentioned above for other examples. In addition, for the installation of said connection device described in said US Patent it is always necessary to have a T-connector, which implies the disadvantage that in the case of an installation that does not comprise T-connectors (symmetrical connectors) it is necessary to replace the asymmetric connectors existing by symmetric ones.

Another example of a patent similar to US Patent US6031368 is EP1801928A1, which deals with a detachable electrical connector. As described in column 6 / lines 41-45 of Patent Application EP1801928A1 the connector consists of a bar connector of an interface of 600A to an interface of 200A, said connector having a third interface that provides electrical communication With the bar.

DESCRIPTION OF THE INVENTION

The high voltage insulated coupling device is intended to be used at a connection point between at least one conductor and an electrical equipment, allowing a cable or conductor connection with a high degree of protection (insulated and shielded), and simultaneously providing voltage and current values at the connection point. This connection corresponds to the connection between a single-conductor conductor cable and electrical equipment

or cell

Specifically, the coupling device of the invention is installed between the electrical equipment and the cable or conductor connector, regardless of the type of connector that exists in the electrical distribution installation, both for angled connectors (asymmetric connector) and T-connectors ( symmetric connector). In this sense, the isolated coupling device comprises several connection holes in which at least one electrical or electronic means is connected through at least one connection element.

The high voltage insulated coupling device of the invention comprises at least one insulating body externally provided with a first conductive layer and internally, at least partially, with a second conductive layer and comprises:

a first connection end that can be coupled to an electrical connection male bushing of the electrical equipment,

a second trunk-conical connection end that can be attached to a female coupling connector of a conductor. This coupling connector can belong to an elbow connector (asymmetric connector) or a T-connector (symmetric connector),

a third connection end configured for the accommodation of a measuring, control and protection means; the measuring, control and protection means comprising at least one conductor terminal in electrical connection with the conductor and the electrical equipment. The measuring, control and protection means can be, for example, a voltage sensor, a voltage transformer, means for receiving / transmitting signals via PLC or means for detecting partial discharges.

The coupling device allows the installation of at least one measuring, control and protection means at the connection point between at least one conductor and an electrical equipment, maintaining the same conductor connector existing in the installation, regardless of the type of connector of the concerned (T-connector or angled connector), thus avoiding the need to replace the existing connector with a new one that allows the installation of the measurement, control and protection means, in short, avoiding complex installation tasks that can increase the probability of errors of assembly and the increase of costs, and on the contrary cutting the time of restoration of the installation.

In the case of a new or under construction distribution facility, the new electrical equipment or cells to be installed can incorporate the coupling device as part of them, thus incorporating the means of measurement, control and protection, as well as at least one current sensor . In this way, both the measurement, control and protection means and the current sensors are installed, adjusted and tested from the factory, thus avoiding problems such as those related to incorrect wiring. In short, any manipulation in the field is avoided.

The third connection end may comprise a third coupling hole and the measurement, control and protection means comprises a third truncated cone connection element connected to the conductive terminal and can be coupled to the third coupling hole. A part of the conductive terminal may be threaded inside the third connection element. The possibility that the measuring, control and protection means is integrated within the third connection element has also been foreseen.

In this way, in the event that the installation of measuring, control and protection means is not necessary, the third coupling hole of the third connection end of the coupling device can be free and closed by means of an insulating plug. If the installation of some means of measurement, control and protection is necessary, the third coupling hole must be coupled to the aforementioned third truncated cone connection element. The third coupling hole can also be used as an access point to the conductor or cable, for example to perform a cable test, measurement checks, etc.

The coupling device may comprise at least one metal part incorporated inside the insulating body. This metal part passes through the conductor terminal and is connected by a first end to the male electrical bushing of the electrical equipment and by a second end to the female coupling connector of the conductor.

The metal part inside the insulating body comprises at least one protrusion which, by screwing said metal part into the electrical connection male bushing of the electrical equipment, pushes the conductive terminal against the electrical connection male bushing of the electrical equipment, thus ensuring tightening.

The second connection end may comprise a second coupling hole, in which a first end of a bitroncoconic connection element is coupled, and the second end of the bitroncoconic connection element can be coupled into the female coupling connector of the conductor. The second end of the metal part is attached to the bitroncoconic connection element.

The metal part may be threaded inside the bitroncoconic connection element.

The bitroncoconic connection element can be an integral part of the insulating body or can be plugged and unplugged therefrom through the second coupling hole.

The insulating body comprises externally a first conductive layer and internally, at least partially, a second conductive layer. The second inner conductive layer is disposed around a central part of the coupling device, where the conductive terminal, the metal part, the third connection element, the male electrical connection bushing and the bitroncoconic connection element come together.

This second inner conductive layer is at the same potential as the conductive terminal, thus ensuring control of the electric field. The first outer conductive layer is grounded through at least one connection point comprising the insulating body. In this way the electric field is uniformly distributed between the second inner conductive layer and the first outer conductive layer of the insulating body, thus avoiding the corona effect and possible partial discharges that may appear.

Likewise, the coupling device allows the installation of at least one current sensor, such as an inductive toroidal sensor, which is mounted around the first connecting end of the insulating body.

DESCRIPTION OF THE FIGURES

To complement the description and in order to help a better understanding of the features of the invention, according to a preferred example of practical implementation thereof, a set of figures is attached as an integral part of said description in which Illustrative and non-limiting, the following has been represented:

Figure 1.- Shows a view of a possible embodiment of the coupling device where a section of the central part has been made for the visualization of the point where the third connection element, the male electrical connection bushing, the connection element come together. bitroncoconic, the conductive terminal and the metal part with the protuberance.

Figure 2.- Shows a view of another possible embodiment of the coupling device where a section of the central part has been made for the visualization of the point where the third connection element, the male electrical connection bushing, the connection element come together. Bitroncoconic, the conductive terminal and the metal part without the protuberance.

Figure 3.- Shows a perspective view of the exploded view of a phase of the network corresponding to the male bushing of electrical connection, coupling device, bitroncoconic connection element and the female coupling connector.

Figure 4.- Shows a perspective view of the exploded view of the device comprising the male connection bushing, bitroncoconic connection element, average means, control and protection, metal part and the insulating body in section.

PREFERRED EMBODIMENT OF THE INVENTION

Figures 1, 2 and 3 show the coupling device (1) that is installed between a female coupling connector (14) of a cable or conductor (5) and an electrical equipment (6), allowing a connection to be made. cable or conductor (5) insulated and shielded, and simultaneously supply voltage and current values at the connection point, incorporating for this by means of the coupling device (1) at least one means of measurement, control and protection (7), by for example a voltage sensor, as well as at least one current sensor (20), for example an inductive toroidal sensor.

In this way, the incorporation of a voltage sensor (7) and / or a current sensor (20) does not depend on the type of cable connector (5) that exists in the distribution installation, such as for example a angled connector (asymmetric connector) or a T-connector (symmetric connector), it is only necessary to have a female coupling connector (14).

The coupling device (1) comprises an insulating body (8) with three connection ends (2,3,4). A first connection end (2) comprising a first connection hole (21) allows the coupling to an electrical connection male bushing (10) of the electrical equipment (6). A second connection end (3) attachable to the female coupling connector (14) of the conductor (5). In the figures, this connector (14) is represented as a T-connector. A third connection end (4) comprising a third connection hole (41) in which a measuring, control and protection means ( 7). The measuring, control and protection element (7) comprises a third coupling element (9) of truncated conical configuration which is coupled in the third hole (41).

The device (1) represented in the figures incorporates a bitroncoconic connection element (11) that is coupled at a second end in the second coupling hole (32) and at a second end is coupled in the female coupling connector (14) of the driver (5). The connecting element (11) can be independent of the insulating body (8) or on the contrary it can be part of it.

The measuring, control and protection means (7) comprises a conductive terminal (15) partially threaded inside the third connection element (9). The coupling device (1) comprises at least one metal part (16), such as a threaded stud, inside the insulating body (8) that passes through the conductive terminal (15) and is screwed into the male electrical connection bushing ( 10). This metal part (16) can comprise a protuberance (19), as shown in Figure 1, which, when said metal part is screwed

(16) in the male electrical connection bushing (10), said protuberance (19) pushes the conductive terminal (15) against said male electrical connection bushing (10), guaranteeing the tightening between them. Inside the insulating body (8) the bitroncoconic connection element (11) is threaded to the metal part (16) and through said bitroncoconic connection element (11) the connection of a female coupling connector (14) is made ) with the coupling device (1), the connector (14) of the cable (5) being able to be part of a T-connector or an angled connector.

As shown in Figures 1 and 2, the insulating body (8) comprises externally a first conductive layer (12) and internally, at least partially, a second conductive layer (13). Said second inner conductive layer (13) is arranged around the central part (18) of the coupling device (1), where the conductive terminal (15), the metal part (16), the third connecting element (9) converge , the electrical connection male bushing (10) and the bitroncoconic connection element (11). This second inner conductive layer (13) is at the same potential as the conductive terminal (15), thus ensuring control of the electric field. The first outer conductive layer (12) is grounded through at least one connection point (17) comprising the insulating body (8). In this way the electric field is uniformly distributed between the second inner conductive layer (13) and the first outer conductive layer (12) of the insulating body (8), thus avoiding the corona effect and possible partial discharges that may appear.

The numerical references used in this text represent the following elements:

1.- Coupling device

2.- First connection end

3.- Second connection end

4.- Third connection end

5.- Driver

6.- Electrical equipment 7.- Means of measurement, control and protection 8.- Insulating body 9.- Third connection element

5 10.- Male bushing with electrical connection 11.- Bitroncoconic connection element. 12.- First outer conductive layer 13.- Second inner conductive layer 14.- Female coupling connector

10 15.- Conductive terminal 16.- Metal part 17.- Connection point 18.- Central part of the device (1) 19.- Extrusion of the metal part (16)

15 20.- Current sensor 32.- Second coupling hole 41.- Third coupling hole On the other hand, the invention is not limited to the specific embodiments described, but rather

it also covers, for example, the variants that can be made by the average expert in the field (for example, in terms of the choice of materials, dimensions, components, configuration, etc.), within what follows from the claims.

Claims (15)

one.

High voltage insulated coupling device, applicable at a connection point between at least one conductor and an electrical equipment, and comprising:

at least one insulating body (8) externally provided with a first conductive layer (12) and internally, at least partially, with a second conductive layer (13), characterized in that it comprises a first connecting end (2) that can be coupled to an electrical connection male bushing (10) of the electrical equipment (6), the device comprising a second conical connection end (3) that can be coupled to a female coupling connector (14) of a conductor (5) and the device comprising a measuring, control and protection means (7) comprising at least one conductor terminal (15) that can be electrically connected with the conductor (5) and the electrical equipment (6), wherein said measuring, control and protection means (7 ) can be housed in a third connection end (4) comprising the device.

2.

Device according to claim 1, characterized in that the third connection end (4) comprises a third coupling hole (41) and that the measuring, control and protection means (7) comprises a truncated conical connection element (9) connected to the terminal conductor (15) and that can be coupled to the third coupling hole (41).

3.

Coupling device according to claim 2, characterized in that a part of the conductive terminal (15) is threaded inside the third connection element (9).

Four.

Coupling device according to claim 2, characterized in that the measuring, control and protection means (7) is integrated inside the third connection element (9).

5.

Coupling device according to claim 1, characterized in that it comprises at least one metal part (16) inside the insulating body (8), which crosses the conductive terminal (15) and which can be connected at a first end to the connecting element (10 ) of the electrical equipment (6).

6.

Coupling device according to claim 5, characterized in that the metal part (16) comprises a protuberance (19), so that when said metal part (16) is threaded inside the male electrical connection bushing (10), said metal part (16) presses the conductor terminal (15) against the male electrical connection bushing (10) by means of said protuberance (19) of the metal part (16).

7.

Coupling device according to claim 5, characterized in that the second connection end (3) comprises a second coupling hole (32), in which a first end of a bitroncoconic connection element (11) is coupled, and because the second end of the bitroncoconic connection element (11) can be attached to the coupling connector (14) of the conductor (5) and because a second end of the metal part (16) can be attached to the bitroncoconic connection element (11).

8.

Coupling device according to claim 7, characterized in that the metal part (16) is threaded inside the bitroncoconic connection element (11).

9.

Coupling device according to claim 7, characterized in that the bitroncoconic connection element (11) is part of the insulating body (8).

10.

Coupling device according to claim 2, characterized in that the measuring, control and protection means (7) comprises at least one voltage sensor, at least one voltage transformer, means for receiving / transmitting signals via PLC or means for detecting partial discharges

eleven.

Coupling device according to claim 1, characterized in that it comprises at least one inductive toroidal sensor (20) mounted around the insulating body (8) for intensity measurement.

12.

Coupling device according to claim 1, characterized in that the inner conductive layer (13) is located around a central part (18) of the device (1) where the conductive terminal (15), the metal part (16), the third meet connection element (9), the male electrical connection bushing (10) and the bitroncoconic connection element (11).

13.

Coupling device according to claim 1, characterized in that the female coupling connector

(14) is part of a T-connector.

14.

Coupling device according to claim 1, characterized in that the female coupling connector

(14) is part of an angled connector.

fifteen.

Coupling device according to claim 1, characterized in that the insulating body (8) externally comprises at least one grounding point (17).