MXPA96004884A - Installation armored distributor of mediatens - Google Patents

Abstract

The present invention relates to a medium voltage distribution installation, characterized in that it comprises at least two shells or shells of insulating material filled with a gas with good dielectric properties, each shell or casing being provided with at least one opening for the passage or hermetic passage of a set of three-phase bars, the shells or housings are arranged together with their openings in contact to define a single internal hermetic or watertight volume, said housings or shells each contain a three-phase switch in three positions, a first position in which the switch connects or connects each one of the bars to the first electrical crosspieces or hermetic electric crossing elements that open on the outside of the shell or shell, a second position in which the switch joins or connects these first healthy crosspieces or elements of crossbars to the second crossbars or elements d and a watertight crosspiece that opens to the outside of the shell or shell and are connected to the ground, a third position in which each of the first crosspieces or crossbar elements are disconnected from the corresponding bar, the first crossbeams or crossbar elements of the at least one shell or housing are each electrically connected to a single-phase cable, the first crosspieces or transom elements of a shell or housing are electrically connected either to a fuse, or to a pole of a circuit breaker, the fuses and / or the Circuit breaker pole are placed in an insulated material compartment

Description

HALF-TENSION ARMORED DISTRIBUTOR INSTALLATION FIELD OF THE INVENTION The present invention relates to a station or installation of medium voltage electrical power distribution.

BACKGROUND OF THE INVENTION Such ports or distribution facilities are known which comprise a cutting apparatus, such as a circuit breaker, placed in a gas-filled hermetic metallic enclosure with good dielectric properties. Other distributing installations comprise a switch, arranged in a hermetic metallic enclosure filled with dielectric gas, connected or connected in series with fuses placed in a separate compartment. In these types of distribution installations, the replacement of a defective device needs to put the distribution system out of tension and empty the insulation gas. These maneuvers are relatively long so that the supply of current to the user is interrupted for a period of duration that is no longer acceptable. REF: 23266 DESCRIPTION OF THE INVENTION An object of the present invention is to conceive a distributor installation in which the replacement of a cutting apparatus can be done without the need to leave the distributor installation out of tension, and preferably without manipulating the gas. Another objective of the invention is to design a distribution system in which the electrical equipment can be made in a different place from that of the installation of the distribution system in order to make the best use of the local technical qualities. Another object of the invention is to design a distribution system whose dismantling at the end of the useful life is isolated, so that it meets the increasingly demanding ecological needs. These objectives are achieved by the distribution installation of the invention, which is characterized in that it comprises at least two shells or shells of insulating material filled with a gas with good dielectric properties, each shell or shell is provided with at least one opening for the hermetic crossing of a set of three-phase bars, the shells or shells are arranged or placed together with their openings in contact to define a single hermetic inner volume, these shells or housings each contain a three-phase switch in three positions, a first position in which the switch joins each of the bars to the first airtight electrical crossing elements or crossing elements that open on the outside of the shell or shell, a second position in which the switch joins or connects these first crossing elements with the second hermetic crossing elements that end in the exteri or of the ornament or shell and are connected to ground, a third position in which each of the first crossing elements are disconnected from the corresponding bar, the first crossing elements of at least one shell or housing are electrically connected each to a single-phase cable, the first traverse elements of a carapace or shell are electrically connected to either a fuse, or to a pole of a circuit breaker, the fuses and / or the pole of the circuit breaker are placed in a compartment of insulating material . According to a particular feature of the invention, each shell or shell is made up of two half-shells or semi-shells assembled by screwing. According to another feature of the invention, the shells or housings are placed in a structure made up of metal sheets folded and assembled by stapling or riveting. According to another characteristic of the invention, the shells or shells comprise a conductive external surface placed or connected to the ground. Advantageously, the shells are fixed to the structure by the engagement of two half-reasons between one or more sheet metal elements of the frame. The circuit breaker or fuses are connected or connected to a ground disconnector arranged in a compartment of the structure, placed below the shell or housing in this circuit breaker or these fuses are connected. Said compartment of the earthing switch is provided with a pivoting shutter for the evacuation of gas in case of failure in the circuit breaker compartment or the fuses. The shells or shells comprise a rupture zone for the evacuation of gas in case of internal failure. The shells or housings are arranged in a compartment of the structure comprising two horizontal plates, side plates, a front face plate and a back plate. A part of the plates constituting the shell compartment is punctured or drilled in the evacuation of the gas in case of rupture of at least one of the rupture zones. The invention will be better understood with the reading of the following description of a preferred embodiment of the invention, with reference to the appended drawing in which: - Figure 1 is a fragmented perspective view of a post or distribution installation that performs two functions of switches in closing or terminal and a function of protection by the circuit breaker, - Figure 2 is a view in elevation partially in section of the post or installation distributor of figure 1, - Figure 3 is a sectional view of a shell or housing used in the post or installation distributor of the invention. - Figure 4 is a sectional view of a pole or distributor installation according to a variant that performs protection by fuses. In Figure 1, references 1, 2 and 3 designate three identical shells or shells of which the constitution is described in detail with reference to Figures 2 and 3. It will not be described in detail that the shell or shell 3; When the three-phase assemblies appear and it will be possible to distinguish the elements that correspond to each of the phases, this distinction will be made by means of the letters A, B and C. The shell or shell 3 is constituted by two half-shells or half-shells 3 '. and 3", made of thermoset or thermoplastic material The shell or shell comprises an external conductive surface placed or connected to the earth that plays on electrical screen paper and which returns to the shell or shell insensitive to air pollution. or semi-housings can be assembled in a hermetic manner by means of flanges 4 'and 4"pressed or pressed by the bolts 5, with interposition of a joint not shown. A shell or shell sensibly has the appearance of a cylinder comprising a cylindrical surface delimited by two parallel, flat phases. The shells or shells are filled with a gas with good dielectric properties such as sulfur hexafluoride SF6, under a pressure that can spread any bars, but which may be lower if service attention demands it. The half-shell or half-shell 3 'contains a set of three-phase bars comprising the bars 6A, 6B and 6C. These bars cross the wall of the half-shell or half-shell 3 'through an opening 7 and extend inside the half-shells or semi-shells homologous 2' and 1 'of the shells or shells 2 and 1. Therefore, the half-shell or central half-shell 2 'comprises openings on each of its planar phases, while the half-shells 1' and 3 'comprise only one opening. The shells or shells are arranged together, so that the volume of a shell or carcass is communicated with the volume of the adjacent shell or shell, the openings of the shells or shells are brought into contact by the joint intermediary such as to ensure the tightness of the assembly or assembly. The half-shells or half-shells 3"contain a three-position switch, comprising three pivoting contact arms with an isolated common shaft 10. Only the arm 9A of the A phase is visible in Figure 3. What will be mentioned about the arm 9A will apply, mutatis mutandis, with the other arms.

The contact arm is maneuvered by means of an embellage comprising the connecting rod 11A and the lever 12A; the lever 12A is articulated to a shaft 13 that passes through the semicaparazón 3"in a hermetic manner and that can thus be maneuvered from the exterior of the half-shell or half-shell 3". The arm 9A is connected, on the side of the articulation 10, with a first electric crossing element 15A which emerges in a hermetic manner on the outside of the half-shell or half-shell 3. "This crossing element comprises an insulating portion coming from the molding with the half-shell or half-shell 3"and an inner conductor 16A intended to be electrically connected as will be indicated later. The arm 9A cooperates first (first position) with a contact 17A attached or connected by a conductor 18A to the bar 6A; on the other hand, the arm 9A cooperates (second position) with a contact 20A arranged at the end of a second electric rail element 21 A comprising an insulating part obtained from molding with the half-shell or half-shell 3"and an inner conductor 22A The conductor of this second crossing element is intended to be connected or connected to the ground, the arm 9A can take a third position, intermediate between the first and second positions.

In this third position, contact 9A is isolated from contact 17A and contact 20A. An insulating wall 25 separates the two half-shells 3 'and 3", the insulating shaft 10, in the course of the opening and closing maneuver, moves to a vicinity of the insulating wall 25, which ensures a displacement of the gas dielectric and allowing the current to be cut The insulating wall 25 comprises the notches 26 that protect it from the degradations caused by the electric arc As shown in Figure 1, the first crossing elements 15A, 15B and 15C of the frame or Casing 1 are joined or connected to the input cables by connectors 31A, 31B and 31C In the same way, the first traverses of the shell or casing 2 are joined or connected to the cables by connectors 32A, 32B and 32C. or carcasses 1, 2 and 3 are arranged in a metal structure designated globally in Figure 1 by reference 41. This structure is made of metal sheets cut, folded and assembled by riveting or stapling. all manufacturing, which excludes the welding, is particularly economical and allows, ultimately equipment, easy disassembly and a relieved recovery of salvageable materials. The half-shells or half-shells 1 to 3 are arranged between two horizontal plates 42 and 43 parallel and fixed by convergence or shrinkage to the assembly of the half-shells or half-shells in the sheet metal elements 44 and 45. The structure comprises a sheet 46 which constitutes the rear phase of the distributor installation, a front plate 47 provided with holes for the passage of the first and second crossing elements of the shells or shells, and the side plates 48 and 49. The shell or shell 3, in the example of the Distributor installation described now, joins or connects to a cutting apparatus. The latter is for example a three-phase vacuum circuit breaker or SF6 sulfur hexafluoride. Only the pole 50A of the circuit breaker is visible in Figure 2. The circuit breaker is placed inside a drawer 51 of thermosetting or thermoplastic insulating material with a conductive surface, fixed to the base or bottom plate 47. This circuit breaker comprises a first set of sockets; between them, the socket 52A is visible in Figure 2 and it is seen that it is connected or joined to the traversing element 15A of the carapace or housing 3. The circuit breaker comprises a second set of sockets connected or connected by the conductors to the cables output by the connector intermediary. In Figure 2, the socket 54A connected or connected by the conductor 55A to the cable 56A is distinguished by the connector 57A. The connectors of other phases, 57B and 57C, are distinguished in Figure 1. The circuit breaker is also connected or connected to a ground disconnector. In FIG. 2, an arm 61 A of the earthing switch and the corresponding connection or connecting conductor 62A is distinguished. The earthing switch is placed in a compartment 63 placed under the half-shell or half-shell 3"; the bottom of this compartment is provided with a shutter or pivoting valve 64 which can be opened in the event of failure inside the compartment 51 and allows the gases to be evacuated towards the rear of the distribution installation. Circuit breaker 50 is operated by a command 65 maneuvered by a train of rods 66-67; The command, known being and not forming part of the invention, has been simply represented by a rectangle in dashed lines. The command 65 is placed in a compartment 68 that overcomes the shell or shell 3. The compartments 69 and 70, adjacent to the compartment 68, can be used to place all the equipment or assembly under tension that exists in any medium voltage distribution installation. It is noted that the shells or housings 1 to 3 each comprise a zone 75 with controlled rupture, which ruptures when a fault occurs, the pressure inside the shell or shell exceeds a predetermined value. The gas escapes through a series of holes 76 treated in the plate 42 and holes 77 treated in the back plate 46. The distribution system is completed by the hoods 81, 81 and 83 that protect the input and output cables. The distribution system of the invention can be easily adapted to the eventual exploitation of the network. Thus, for example, it is possible to replace the circuit breaker function contained in the drawer 51, by a fuse function, the drawer 51 reaches a well for the fuses.

This evolution is illustrated in Figure 4 which is a partial sectional view of a distribution installation comprising two curved or loop outputs and a transformer protection for a fuse. As already mentioned, the distributing installation of Figure 4 differs from that described with reference in the preceding figures because the cutting apparatus 50 is replaced by the fuses. These are contained in the drawer 51, closed by a removable lid 51 A easily removed during the replacement of the fuses. Fuse 90A of phase A is visible in Figure 4 and is connected to outlet 15A and connector 57A. The advantages of the distribution plant, of which two variants are described, are multiple: - it is simple and economical construction, - it allows to separate the manufacturing activities of the equipment or assemblies, which need a high level of quality, and the assembly activities, which can be done at the place of use by a less specialized workforce. - allows the replacement under tension of certain electrical junctions, which ensures a greater continuity of service, - allows to avoid most of the time any gas handling, which is a clear ecological advantage, - allows a recycling or economic recirculation at the end of its useful life, - it is susceptible of a rapid evolution that allows an easy adaptation to the exploitative changes of the network. The invention is not limited to the described examples; On the other hand, the design of the indicated distribution facility allows to realize, with the same means, the distributing installations of insulation in the air and cutting in the SF6 or the total insulation installations of the SF6, in all possible configurations of use.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, the content of the following is claimed as property

Claims (10)

1. A medium voltage distribution installation, characterized in that it comprises at least two shells or shells of insulating material filled with a gas with good dielectric properties, each shell or casing is provided with at least one opening for the passage or hermetic passage of a set of bars three-phase, the shells or shells are arranged together with their openings in contact to define a single internal hermetic or watertight volume, said shells or shells each contain a three-phase switch in three positions, a first position in which the switch unites or connects each of the bars to the first electrical crosspieces or hermetic electrical crossing elements that open out on the outside of the shell or shell, a second position in which the switch joins or connects these first trave-sails or crossing elements to the second crossing or hermetic crossing elements that lead to the outside of the shell or carapace and are connected to the ground, a third position in which each of the first traverses or crossing elements are disconnected from the corresponding bar, the first traverses or crossing elements of at least one shell or shell are each electrically connected to a single-phase cable, the first traverses or crossing elements of a shell or housing are electrically connected either to a fuse, or to a pole of a circuit breaker, the fuses and / or the pole of the circuit breaker are placed in a compartment of insulating material.

2. The distribution installation according to claim 1, characterized in that each shell or shell is constituted by two half-shells or half-shells assembled by screwing.

3. The distributor installation according to claim 2, characterized in that the shells or housings are arranged in a structure consisting of metal plates folded and assembled by stapling or riveting.

4. The distribution installation according to claim 3, characterized in that the shells or housings are fixed to the structure by the engagement or seizure of two half-shells or half-shells between one or more sheet metal elements of the frame.

5. The dispensing installation according to one of claims 1 to 4, characterized in that the shells or shells comprise a conductive external surface placed or connected to the ground.

6. The distributor installation according to one of claims 1 to 5, characterized in that the circuit breaker or the fuses are connected to or connected to a ground disconnector arranged in a compartment of the structure, placed below the shell or housing to this circuit breaker or these Fuses are united.

7. The distributor installation according to claim 6, characterized in that said compartment of the earthing switch is provided with a shutter or pivoting valve for evacuation of gases in case of failure in the compartment of the circuit breaker or of the fuses.

8. The dispensing installation according to one of claims 1 to 7, characterized in that the shells or shells comprise a rupture zone for the evacuation of gas in case of internal failure.

9. The distribution system according to one of claims 3 to 8, characterized in that the shells or housings are arranged in a compartment of the structure comprising two horizontal plates, the side plates, a front face plate and a back plate.

10. The distributor installation according to claim 9, characterized in that a part of the sheets that constitute the compartment of the shells or housings is perforated with notches or holes for the evacuation of gases in case of rupture of at least one of the rupture zones .