FR2894888A1

FR2894888A1 - Electric energy supplying device for tramway, has electric voltage supplying source arranged for establishing continuous voltage between retention rail and track, where voltage is lower than one hundred and twenty volts

Info

Publication number: FR2894888A1
Application number: FR0603633A
Authority: FR
Inventors: Olivier Chantal
Original assignee: Alstom Transport SA
Current assignee: Alstom Transport SA
Priority date: 2006-04-24
Filing date: 2006-04-24
Publication date: 2007-06-22

Abstract

The device has a retention rail (24) and a track (22) that are electrically accessible by a vehicle during displacement of the vehicle, where the retention rail is placed on a ground of a tramway (2). An electric voltage supplying source (28) is connected between the retention rail and the track. The source is arranged for establishing continuous voltage between the retention rail and the track, where the voltage is lower than one hundred and twenty volts.

Description

L'invention concerne un dispositif d'alimentation en energie electriqueThe invention relates to a device for supplying electrical energy

par le sol d'un vehicule terrestre mobile pouvant se deplacer sur une piste de roulement. Pour des raisons d'ordre esthetique ('alimentation electrique d'un tramway par catenaire ne convient pas toujours pour la traversee de certaines zones de centre ville comme par exemple une place historique ou un carrefour traversable par des convois exceptionnels. Des systemes embarques peuvent titre utilises comme le volant d'inertie ou les batteries, mais ces systemes sont encombrants et leur autonomie reste limitee, ce qui est un inconvenient lorsque la distance des zones a traverser atteint quelques centaines de metres. Resolvant ces difficultes, it est classique d'utiliser des alimentations electriques par le sol a la tension de 750 volts. Toutefois, afin de proteger des pietons contre ('electrocution, it est necessaire d'activer exclusivement ('alimentation au niveau de troncons de voie places directement sous le vehicule lors de son passage, ce qui implique de pouvoir disposer d'une serie d'alimentations commutables selon une chaIne de propagation. II en resu'lte une grande complexite de mise en oeuvre du systeme tant du point de vue de la fiabilite securitaire que de la disponibilite operationnelle du systeme. Le probleme objectif pose par une alimentation au sol est donc la complexite des moyens de commutations electriques d'alimentation necessaires pour garantir la securite des pietons, qui induisent des coats importants. Le but de ('invention est donc de fournir un dispositif d'alimentation electrique par le sol plus simple. A cet effet, ('invention a pour objet un dispositif d'alimentation en energie electrique par le sol d'un tramway pouvant se deplacer sur une voie de roulement comprenant : -un rail de captage, situe au sol, electriquement accessible par le vehicule Tors de son deplacement, - un conducteur de reference electrique servant de masse, electriquement accessible par le vehicule lors de son deplacement, - une source d'alimentation electrique en tension raccordee electriquement entre le rail de captage et le conducteur de reference, caracterise en ce que la source d'alimentation est agencee pour etablir une tension continue entre le rail de captage et le conducteur de reference electrique inferieure a 120 volts continu. Suivant des modes particuliers de realisation, le dispositif 5 d'alimentation comporte une ou plusieurs des caracteristiques suivantes : - la source d'alimentation en tension est de type flottante, - Ia source d'alimentation est apte a fournir une intensite de courant dont la valeur est comprise entre 1000 A et 3000 A, - le rail de captage est constamment alimente et depourvu de moyens de 10 commutation permettant la mise sous tension ou ('isolation de troncons du rail de captage en fonction de la position de tramway sur la voie, - le rail de captage presente une section transversale dont la valeur est comprise entre 10 cm2 et 50 cm2, et - le dispositif comprend un capot de protection, electriquement isolant, 15 recouvrant partiellemerit une surface du rail de captage et perce d'une fente longitudinale permettant le passage et le glissement d'un frotteur selon une direction longitudinale. L'invention a egalement pour objet un systeme de transport terrestre comprenant : 20 - une voie de roulement, - un dispositif d'alimentation tel que defini ci-dessus, et - au moins un vehicule terrestre mobile pouvant se deplacer sur la voie de roulement, comprenant un frotteur permettant d'assurer le couplage electrique entre le rail de captage et le vehicule mobile suivant une surface de contact 25 mobile. Suivant des modes particuliers de realisation, le systeme de transport comporte rune ou plusieurs des caracteristiques suivantes : - la surface de contact du frotteur sur le rail de captage est comprise entre 10 cm2 et 50 cm2, 30 - le rail de captage comprend une zone active de couplage electrique, tournee du meme cote que la surface d'appui du vehicule sur la voie de roulement, - le rail de captage comprend une zone active de couplage electrique, tournee du cote oppose a la surface d'appui du vehicule sur la voie de roulement, et - le dispositif d'alimentation comprend au moins une gouttiere destinee au drainage et a ('evacuation d'objets et le rail de captage est dispose de fawn a etre en elevation par rapport a la ou chaque gouttiere. L'invention sera mieux comprise a la lecture de la description qui va suivre, donnee uniquement a titre d'exemple et faite en se refer-ant aux dessins annexes, sur lesquels : -Ia Figure 1 est une vue de cote simplifiee d'un systeme de transport de type tramway comprenant un dispositif d'alimentation au sol selon ('invention ; - Ia Figure 2 est une vue en perspective de la voirie coupee selon la ligne II-II de la Figure 1, dans laquelle est illustree une premiere forme de realisation du dispositif d'alimentation au sol ; - la figure 3 est une vue en coupe selon la ligne III-III de la Figure 1 d'un systeme de transport comprenant la premiere forme de realisation du dispositif d'alimentation au sol ; et - la Figure 4 est une vue en coupe selon la ligne III-III de la Figure 1 d'une deuxieme forme cle realisation du dispositif d'alimentation au sol. by the ground of a mobile land vehicle that can move on a running track. For aesthetic reasons (electric supply of a catenary streetcar is not always suitable for crossing certain areas of the city center such as a historic square or crossroads by exceptional convoys. used as the flywheel or the batteries, but these systems are bulky and their autonomy is limited, which is a disadvantage when the distance of the zones to cross reaches a few hundred meters Resolving these difficulties, it is traditional to use electrical power supplies by the ground at the voltage of 750 V. However, in order to protect pedestrians against electrocution, it is necessary to activate exclusively ('feeding at the level of the trunks of the tracks placed directly under the vehicle during its passage This implies having a series of switchable power supplies along a propagation chain. lexite of implementation of the system as from the point of view of the reliable reliability as of the operational availability of the system. The objective problem posed by a ground supply is therefore the complexity of the electrical switching means necessary to ensure the safety of the pedestrians, which induce significant costs. The object of the invention is therefore to provide a simpler electric power supply device for the purpose of this invention (the invention relates to a device for supplying electrical energy to the ground of a tramway that can be moved on a track comprising: a sensor rail, located on the ground, electrically accessible by the vehicle during its displacement, an electric reference conductor serving as a mass, electrically accessible by the vehicle during its displacement, a source electrical voltage supply connected electrically between the sensing rail and the reference conductor, characterized in that the supply source is arranged to establish a DC voltage between the sensing rail and the electrical reference conductor less than 120 volts According to particular embodiments, the power supply device 5 comprises one or more of the following characteristics: the voltage supply source; n is of floating type, - the power source is able to provide a current intensity whose value is between 1000 A and 3000 A, - the sensing rail is constantly fed and devoid of switching means allowing the setting under tension or isolation of the trunk sections of the catchment rail as a function of the tramway position on the track, the catching rail has a cross-section the value of which is between 10 cm2 and 50 cm2, and the device comprises a protective cover, electrically insulating, 15 partially covering a surface of the sensing rail and pierces with a longitudinal slot for the passage and sliding of a wiper in a longitudinal direction. The invention also relates to a land transport system comprising: - a rolling track, - a feed device as defined above, and - at least one movable land vehicle can move on the track , comprising a wiper for providing electrical coupling between the sensing rail and the moving vehicle following a movable contact surface. According to particular embodiments, the transport system comprises one or more of the following characteristics: the contact surface of the wiper on the sensing rail is between 10 cm 2 and 50 cm 2, the sensing rail comprises an active zone; electrical coupling, rotated on the same side as the bearing surface of the vehicle on the track, - the sensing rail comprises an active electrical coupling zone, turned from the side opposite the vehicle bearing surface on the track and the feed device comprises at least one gutter for drainage and evacuation of objects and the sensing rail is arranged to be elevated relative to the or each gutter. will be better understood on reading the following description, given solely by way of example and made with reference to the accompanying drawings, in which: FIG. 1 is a simplified side view of a transport system Of type tramway comprising a ground feeding device according to the invention; - Figure 2 is a perspective view of the road cut along the line II-II of Figure 1, which is illustrated a first embodiment of the ground feeding device; - Figure 3 is a sectional view along the line III-III of Figure 1 of a transport system comprising the first embodiment of the ground feeding device; and - Figure 4 is a sectional view along the line III-III of Figure 1 of a second embodiment of the ground feeding device.

Une portion de ligne de transport par tramway est representee schematiquement dans la Figure 1. Trois troncons de ligne sont ici representes : un premier troncon Tl dit aerien dans lequel ('alimentation electrique du tramway est effectue par un fil catenaire, un deuxieme troncon T2 intermediaire dans lequel ('alimentation electrique est effectuee par un rail de captage au sol, un troisieme troncon aerien T3. Une ligne de transport par tramway comprend un ensemble de vehicules mobiles 2 ou de rames automotrices constituant des tramways et une infrastructure de sol ou voirie de transport 4. A portion of a tramway transmission line is represented schematically in FIG. 1. Three line sections are represented here: a first so-called aerial section Tl in which the tramway's electrical power supply is carried out by a catenary wire, a second intermediate trunk T2 in which the electrical supply is effected by a ground-catching rail, a third aerial trunk T. A tram-carrying line comprises a set of mobile vehicles 2 or self-propelled trains constituting trams and a ground infrastructure or road network. transport 4.

Ici, un seul vehicule 2 est represents. Le vehicule 2 comprend une caisse 6 de transport des voyageurs supportee par un ensemble de roues 8 et une chalne de traction '10 pour I'entrainement des roues motrices 8. Le vehicule 2 comporte deux dispositifs distincts d'alimentation de la chaine de traction 10, a savoir des pantographes 12 propres a alimenter en energie electrique les chaines de traction 10 depuis un fil catenaire 14, et un frotteur 16 propre a alimenter en energie electrique la chaine de traction 10 depuis un dispositif d'alimentation au sol 18. Les pantographes 12 et le frotteur 16 sont raccordes a la chaine de traction 10 au travers de moyens de commutation 20 de selection de la provenance de ('energie electrique, a savoir le fil cater-mire 14 ou le dispositif d'alimentation au sol 18. La voirie de transport 4 comprend une vole de roulement 22, ici deux rails metalliques portant les roues 8 et assurant le guidage de leur pivotement, le dispositif d'alimentation au sol 18. Ce dernier comporte un rail de captage 24 electriquement conducteur, ici metallique, recouvert par un capot de protection 26 isolant, et une ou plusieurs sources d'alimentation 28 alimentant en meme temps le rail de captage. II s'agit d'une source en tension continue, branchee entre un point I de la piste de roulement 22 et un point J du rail de captage 24. En tout point de la longueur du rail de roulement 22 et du rail de captage 24, le dispositif d'alimentation au sol 18 est apte a fournir a la chaine de traction 10 un courant compatible avec les performances necessaires en contre ville entre 1000 et 3000 amperes sous une tension continue inferieure a 120 volts et permettant une vitesse de circulation jusqu'a 30 km/h. Le rail de captage 24 est prolonge de maniere discontinue en chacune de ses extremites par un rail d'aide au changement du mode d'alimentation 30, de la forme d'une rampe, permettant ('entree du frotteur 16 a I'interieur de la caisse 6 en sortie SRT du troncon d'alimentation par le sol T2, ainsi que de guidage du frotteur 16 en entree ENT du trongon T2 pour I'amener au niveau du rail de captage 24. Here, only one vehicle 2 is represented. The vehicle 2 comprises a passenger transport crate 6 supported by a set of wheels 8 and a traction line 10 for driving the driving wheels 8. The vehicle 2 comprises two separate devices for supplying the traction chain 10 that is, pantographs 12 capable of supplying electrical energy to the traction chains 10 from a catenary wire 14, and a wiper 16 capable of supplying electrical energy to the traction chain 10 from a ground feeding device 18. The pantographs 12 and the wiper 16 are connected to the traction chain 10 through switching means 20 for selecting the source of the electrical energy, namely the caterpillar wire 14 or the ground feeding device 18. Transport road 4 comprises a bearing wheel 22, here two metal rails carrying the wheels 8 and guiding their pivoting, the ground feeding device 18. The latter comprises a sensing rail 2 4 electrically conductive, here metallic, covered by an insulating protective cover 26, and one or more power sources 28 simultaneously supplying the sensor rail. It is a DC voltage source, connected between a point I of the running track 22 and a point J of the sensing rail 24. At any point along the length of the running rail 22 and the sensing rail 24 , the ground feeding device 18 is able to supply the traction chain 10 with a current compatible with the performance required against the city between 1000 and 3000 amperes under a DC voltage of less than 120 volts and allowing a speed of circulation up to 120 volts. at 30 km / h. The sensing rail 24 is discontinuously extended at each of its ends by a support rail to change the feed mode 30, in the form of a ramp, allowing the entry of the wiper 16 into the interior of the the body 6 at the output SRT of the ground supply trunk T2, as well as guiding the wiper 16 in ENT input of the trongon T2 to bring it to the level of the sensing rail 24.

Afin d'assurer le changement de mode entre I'alimentation aerienne et I'alimentation par le sol une fenetre 32 est menagee dans le capot de protection 26 au-dessus de chacune des rampes 30, electriquement isolantes. Elie permet 1'acces du frotteur 16, en entree ENT et en sortie SRT du troncon T2, entre le capot de protection 26 et le rail de captage 24. In order to ensure the change of mode between the air supply and the ground supply, a window 32 is housed in the protective cover 26 above each of the ramps 30, which are electrically insulating. Elie allows the access of the wiper 16, in ENT input and SRT output of the trunk T2, between the protective cover 26 and the sensing rail 24.

Les details transversaux par rapport a la figure 1 de la voirie de transport 4 apparaisserit clairement sur la figure 2. Ainsi, le capot de protection 26, de la forme d'une plaque etendue en longueur, est perce d'une fente longitudinale etroite 34 permettant la seule circulation du frotteur 16 le long du rail de captage 24 et le glissement d'un frotteur 16 selon une direction longitudinale. Dans une premiere forme de realisation, le rail de captage 24, de la forme d'un long barreau est dispose sur une partie centrale de fond 36. II forme un creneau delimitant de part et d'autre deux gouttieres 38. Le fond 36 est orients dans le meme sens que la surface de roulement 40 de la piste de roulement 22. L'interface de liaison electrique entre le vehicule mobile 2 et le dispositif d'alimentation au sol 18 apparait sur la figure 3. Le frotteur 16 du vehicule 2, faisant partie de !'interface electrique, cornprend d'un seul tenant un patin 44 et une tige 50. Le patin 44 presente la forme d'une plaque dont une face 46 est destinee a etre en contact avec une zone active 48 du rail de captage 24. La zone active 48 est orientee dans le meme sens que la surface de roulement 40 de la voie de roulement 22. La tige 50 s'etend perpendiculairement au patin 44. La tige 50 sert a la fois de liaison mecanique et electrique du patin 16 sur le reste du vehicule 2 et peut glisser le long de la fente 34 du capot de protection 26. Un dispositif de maintien appartenant au vehicule et non represents ici permet d'assurer le contact entre la surface de contact 46 du patin 44 et la zone active 48 du rail de captage 24. The cross-sectional details with respect to FIG. 1 of the transport road 4 are clearly shown in FIG. 2. Thus, the protective cover 26, in the form of a plate extended in length, is pierced by a narrow longitudinal slot 34 allowing the sole circulation of the wiper 16 along the sensing rail 24 and the sliding of a wiper 16 in a longitudinal direction. In a first embodiment, the sensing rail 24, in the form of a long bar is arranged on a central bottom portion 36. It forms a slot delimiting on either side two rainware 38. The bottom 36 is orients in the same direction as the running surface 40 of the raceway 22. The electrical connection interface between the mobile vehicle 2 and the ground feeding device 18 appears in Figure 3. The wiper 16 of the vehicle 2 , forming part of the electrical interface, comprises in one piece a shoe 44 and a rod 50. The pad 44 has the shape of a plate whose face 46 is intended to be in contact with an active zone 48 of the rail 24. The active zone 48 is oriented in the same direction as the running surface 40 of the track 22. The rod 50 extends perpendicularly to the pad 44. The rod 50 serves both mechanical and electrical connection skid 16 on the rest of the vehicle 2 and can slide along the fent 34 of the protective cover 26. A holding device belonging to the vehicle and not shown here makes it possible to ensure contact between the contact surface 46 of the pad 44 and the active area 48 of the sensing rail 24.

Afin d'assurer une circulation de courant d'une intensite suffisante, la section transversale 51 du rail de captage d'une part, et la surface de contact 46 du frotteur 16 sur le rail de captage 24 d'autre part, est comprise entre 10 cm2 et 50 cm2. Selon une deuxieme forme de realisation du dispositif d'alimentation 18 dans la figure 4, le rail de captage 24 est ports par le bras 52 d'une poutre 54 disposee sur le fond 36 d'une gouttiere 38 ayant la forme dune simple vallee. Dans cette configuration, la zone active 48 de couplage electrique du rail de captage 24 est tournee du cote oppose a la surface d'appui 40 de la piste de roulement 22, sur le vehicule. In order to ensure a flow of current of sufficient intensity, the cross section 51 of the sensing rail on the one hand, and the contact surface 46 of the wiper 16 on the sensing rail 24 on the other hand, is between 10 cm2 and 50 cm2. According to a second embodiment of the feed device 18 in Figure 4, the capture rail 24 is carried by the arm 52 of a beam 54 disposed on the bottom 36 of a gutter 38 having the shape of a single valley. In this configuration, the active electrical coupling zone 48 of the sensing rail 24 is turned away from the side opposite the bearing surface 40 of the raceway 22, on the vehicle.

Dans cette configuration, une forme adaptee de la tige 50 du frotteur 16 permet a Ia tige de contourner une partie du bras porteur 52 de la poutre 54. Elie permet aussi le depassement par le patin 44 d'une face 58 caractsrisant I'epaisseur du rail de captage. Elie permet enfin le centrage de la surface de contact 46 du patin 44 avec la zone active 48 du rail de captage 24, et le rapprochement de la surface de contact 46 et de la zone active 48. Un dispositif de maintien non represents ici permet d'assurer un contact permanent du patin 44 sur le rail de captage 24, le sens de I'action exercee par le dispositif sur le patin 44 stant orients dans le meme sens que la normale a la surface de roulement 40. En fonctionnement, la source d'alimentation 28 etablit en permanence une tension continue a 110 volts nominal par exemple, entre le rail de captage 24 et le rail de roulement 22, comme par exemple entre les joints E et F. In this configuration, an adapted form of the shank 50 of the wiper 16 allows the shank to bypass a portion of the support arm 52 of the beam 54. Elie also allows the wiper 44 to overtake a face 58 characterizing the thickness of the catchment rail. Elie finally allows the centering of the contact surface 46 of the pad 44 with the active area 48 of the sensing rail 24, and the approach of the contact surface 46 and the active area 48. A holding device not shown here allows ensure a permanent contact of the pad 44 on the capture rail 24, the direction of action exerted by the device on the pad 44 stant orients in the same direction as the normal to the running surface 40. In operation, the source supply 28 permanently establishes a direct voltage at 110 nominal volts, for example, between the sensing rail 24 and the running rail 22, for example between the joints E and F.

Tout piston peut circuler paisiblement au-dessus du rail de captage 24 aliments constammeni:, sans courir de risque d'electrocution meme en introduisant un objet metallique dans la fente, la valeur de la tension continue inferieure a 120 volts rie presentant pas de danger car classee en tits basse tension. Any piston can circulate peacefully above the catchment rail 24 constammeni food, without running the risk of electrocution even by introducing a metal object into the slot, the value of the DC voltage lower than 120 volts rie presenting no danger because classified in low voltage.

Ainsi, aucune commutation d'alimentation nest requise pour certains trongons de la voie en fonction de la position du vehicule et le dispositif d'alimentation au sol 18 dans sa simplicite offre une grande disponibilite et fiabilite. De plus, la protection supplementaire conferee pour le capot de protection 26 isolant ainsi que les zones isolantes 42 renforce la securite des pistons, le risque d'un contact accidentel avec le rail de captage 24 etant diminue. En fonctionnement, le rail de captage 24 etant sous tension, le vehicule 2 quittant le troncon de ligne catenaire T1 entre dans le troncon d'alimentation par le sol T2. Dans le meme temps, le commutateur electrique 20 a deconnecte ('alimentation en energie en provenance des pantographes 12 et a connects electriquement le frotteur 16 a la chaine de traction 10. Le frotteur 16 guide par la rampe du rail d'aide a la commutation 30 et mis en position dans le puit 32, accede transversalement au plan de la figure 1 au dispositif d'alimentation par le sol 18. A ('entree ENT du troncon T2, la tige 50 du frotteur 16 coulisse longitudinalement dans la fente 34 du capot de protection 26 et entraine le patin 44 dont la surface de contact 46 est tournee vers la zone active 48 du rail de captage 24. Thus, no power switching is required for certain trongons of the track depending on the position of the vehicle and the ground feeding device 18 in its simplicity offers great availability and reliability. In addition, the additional protection provided for the insulating protective cover 26 as well as the insulating zones 42 increases the safety of the pistons, the risk of accidental contact with the sensing rail 24 being reduced. In operation, the sensing rail 24 being energized, the vehicle 2 leaving the catenary section trunk T1 enters the ground supply section T2. At the same time, the electrical switch 20 has disconnected (power supply from the pantographs 12 and electrically connects the wiper 16 to the traction chain 10. The wiper 16 guides by the ramp of the switching assistance rail 30 and placed in position in the well 32, accesses transversely to the plane of FIG. 1 to the ground feeding device 18. At the ENT input of the trunk T2, the rod 50 of the wiper 16 slides longitudinally in the slot 34 of the protective cover 26 and causes the shoe 44 whose contact surface 46 is turned towards the active area 48 of the capture rail 24.

Le dispositif de maintien non represents actionne le frotteur 16 vers la zone active de couplage 48 electrique du rail de captage 24 et maintient en contact la surface de contact 46 du frotteur 16 et la zone active 48 de captage sous une pression predeterminee. La chaine de traction 10 du vehicule 2 est ainsi alimentee par le sot. En variante, la ligne de transport est une ligne a trolleys comprenant des vehicules sur pneus et un dispositif d'alimentation en energie electrique par le sol comportant deux conducteurs electriques run etant le rail de captage et I'autre un fil electrique ou rail de reference electrique servant de ligne de retour du courant. The non-shaped holding device actuates the wiper 16 towards the active electrical coupling zone 48 of the sensing rail 24 and maintains contact with the contact surface 46 of the wiper 16 and the active sensing zone 48 under a predetermined pressure. The traction chain 10 of the vehicle 2 is thus fed by the fool. As a variant, the transmission line is a trolley line comprising wheeled vehicles and an electric ground power supply device comprising two electrical conductors run being the capture rail and the other an electrical wire or reference rail. electric serving as the return line of the current.

Claims

1. Apparatus for supplying electrical energy from the ground of a tramway (2) able to move on a track (22) comprising: a pickup rail (24), located on the ground, electrically accessible by the vehicle (2) tors de son displacement, - an electric reference conductor (22) serving as mass, electrically accessible by the vehicle (2) During its displacement, - a voltage electrical supply source (28) electrically connected between the sensing rail (24) and the reference conductor (22), characterized in that the supply source (28) is arranged to establish a DC voltage between the sensing rail (24) and the electrical reference conductor (22). ) less than 120 volts DC.

2. Feeding device according to claim 1, characterized in that the voltage supply source (28) is of floating type.

3. Power supply device according to claim 1 to 2, characterized in that the power source (28) is capable of providing a current intensity whose value is between 1000 A and 3000 A.

4. Feeding device according to rune of claims 1 to 3, characterized in that the sensing rail (24) is constantly fed and devoid of switching means for energizing or ('isolation of trunks of the capture rail in depending on the tram position on the track (22).

5. Feeding device according to one of claims 1 to 4, characterized in that the sensing rail (24) has a cross section (51) whose value is between 10 cm2 and 50 cm2.

6. Feeding device according to claim 5, characterized in that it comprises a protective cover (26), electrically insulating, partially covering a surface of the sensing rail (24) and pierces with a longitudinal slot (34). allowing the passage and sliding of a wiper (16) in a longitudinal direction.

7. Land transport system comprising: - a raceway (22), - a feed device (18) according to any one of claims 1 to 6, and at least one movable land vehicle (2) able to move on the track (22), comprising a wiper (16) for providing electrical coupling between the sensor rail (24) and the mobile vehicle (2) along a movable contact surface (46).

8. Land transport system according to claim 7, characterized in that the contact surface (46) of the wiper (16) on the sensing rail (24) is between 10 cm2 and 50 cm2.

9. Land transport system according to rune claims 7 and 8, characterized in that the sensor rail (24) comprises an active electrical coupling area (48), rotated the same dimension as the bearing surface (40) of the vehicle (2) on the track (22).

10. A land transport system according to rune claims 7 and 8, characterized in that the sensing rail (24) comprises an active electrical coupling area (48), rotated from the side opposite the bearing surface (40) of the vehicle (2) on the track (22).

11. Land transport system according to any one of claims 7 to 10 characterized in that the feeding device (18) comprises at least urge gutter (38) for drainage and evacuation objects and in that the The sensing rail (24) is arranged in elevation with respect to the or each gutter (38).