WO2012123323A1 - Système de mise en contact électrique - Google Patents

Système de mise en contact électrique Download PDF

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Publication number
WO2012123323A1
WO2012123323A1 PCT/EP2012/053980 EP2012053980W WO2012123323A1 WO 2012123323 A1 WO2012123323 A1 WO 2012123323A1 EP 2012053980 W EP2012053980 W EP 2012053980W WO 2012123323 A1 WO2012123323 A1 WO 2012123323A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
current path
pieces
electrical contact
arrangement according
Prior art date
Application number
PCT/EP2012/053980
Other languages
German (de)
English (en)
Inventor
Norbert Lüthy
Dajana MIELKE
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2012123323A1 publication Critical patent/WO2012123323A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/308—Conductive members located parallel to axis of screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/60—Connections between or with tubular conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/007—Butt joining of bus-bars by means of a common bolt, e.g. splice joint
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/066—Devices for maintaining distance between conductor and enclosure
    • H02G5/068—Devices for maintaining distance between conductor and enclosure being part of the junction between two enclosures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/10—Cooling

Definitions

  • the invention relates to an electrical contact arrangement having a first contact piece and a second contact piece, which are contacted to form a contact point with each other in an electrically conductive manner and with a con ⁇ contact point dielectrically shielding shield cap.
  • Such electrical contact assemblies are beschrie ⁇ ben for example, in Japanese Unexamined Patent Publication JP60-170174.
  • a first contact piece is in each case contacted with a second contact piece in an electrically conductive manner, so that a contact point is formed between the two contact pieces.
  • each is a
  • Umbrella hood homogenizes the contour of the contact point in order to use the contact arrangement in the high voltage range can.
  • a contact arrangement in the course of a conductor run is ei ⁇ ne discontinuity, which is normally equipped with an import pedanzerièrenden contact resistance. This results in a flow of current through the contact arrangement heat. A dissipation of heat by direct radiation into the environment is hindered by the umbrella hood.
  • the shielding cap is necessary in order to homogenize the outer contour of the electrical contact arrangement in order to be able to transport large amounts of energy in the high-voltage region via the electrical contact arrangement.
  • the screen hood obstructs a direct emission of thermal energy from the contact point and thus limits their load capacity.
  • this is achieved in an electrical contact arrangement of the type mentioned above in that between the first contact piece and the second contact piece, a first current path via the contact point and a second current path are formed on the screen hood.
  • the use of the screen hood as a current path for the transmission of electrical energy makes it possible to create current heat also immediacy bar in the shield cap. Since the Schirmhau be a homogenization of the outer contour of the electrical contact assembly, heat from the outer shield can be radiated me directly. Thus, the heat can be passed out of the electrical contact arrangement in a direct manner. The screen hood is therefore no longer a barrier to a part of the heat radiation, since in the
  • the shield cap is made of a material which is electrically conductive.
  • metals such as aluminum, copper, etc. can be used. Such materials can also cause an influence of electric fields with their metallic surfaces.
  • the screen hood can serve as a current path and on the other hand as a shielding element for influencing electric fields.
  • a contact arrangement according to the invention can preferably be used in compressed gas insulation of electrical energy transmission systems.
  • an insulating gas is subjected to an increased pressure relative to atmospheric pressure.
  • the encapsulating housing takes in its In ⁇ neren phase conductor for guiding an electric current on. Part of these phase conductors are, for example, contact arrangements.
  • a further advantageous embodiment can provide that the first current path and the second current path are electrically pa ⁇ rallel connected.
  • a further advantageous embodiment can provide that the second current path encompasses the first current path.
  • the outer contour of the electric Maisanord ⁇ voltage can be smoothed by means of the shield cap. This provides a possibility to form the first current path almost arbitrarily, since its outer contour is smoothed by the enclosing umbrella hood. This makes it possible, for example, to allow at the contact ⁇ point protruding edges, bolt heads, etc., to realize the best possible tension of the two contact pieces.
  • the first and second current paths should preferably be arranged coaxially with each other.
  • the first and the second current path lead to an electric current divided into the first and the second current path.
  • Guiding a split current makes it possible to conduct a first partial current in the interior of the electrical contact arrangement via the first current path and a second partial current in the exterior via the second current path.
  • the impedance of the first current path should be lower than the impedance of the second current path.
  • the contact ⁇ point a rigid angle composite of first contact piece and second contact piece forms and the shield cap is movable relative to at least one of the two contact pieces, in particular to both contact pieces.
  • the two contact pieces can be joined at the contact angle ⁇ rigidly to each other so that forces between the first contact piece and the second contact piece can be exchanged via the contact point. So it is beispielswei ⁇ se possible conclusions about the contact point thermally induced change in length to transfer and let them take example from a compensation element.
  • the screen hood should be relatively movable ⁇ at least to one of the two contact pieces. It can be provided that the screen hood can rotate for example about an axis or is displaceable along an axis.
  • the screen cover is connected angularly ⁇ rigid with one of the contact pieces, for example by means of a press fit or a material-locking joining process, whereas to the other contact piece a relative mobility between the contact piece and shield hood is possible.
  • the contact point can be spanned by the shield cap and, for example for inspection or repair work are moved by an axial Unlike the contact point.
  • the relative mobility of the shielding hood with respect to the contact pieces is limited.
  • the use of securing means such as screws, bolts, spring washers, etc. may be provided.
  • a sliding contact element is arranged between at least one contact piece and the screen hood.
  • a sliding contact element between the shield hood and contact piece can be provided.
  • the sliding contact element should be elastically deformable in order to compensate for relative movements can.
  • a sliding contact element may for example be a contact blade, a contact finger, a contact spring o. ⁇ ., Which is inserted into a joint gap between the shield cap and one of the contact pieces.
  • a sliding contact element can be used in ⁇ particular at the points at which a contact piece to the screen hood can perform a relative movement. Thus, it is also possible for a relative movement to occur to achieve a permanent electrically conductive connection between the shield cap and one or both of the contact pieces.
  • the screen cover is connected win ⁇ kelstarr with one of the contact pieces
  • a connection to the other contact piece allows for example by means of a press ⁇ fit or a material-locking joining process, wohinge ⁇ gene relative movability between the contact piece and shield hood.
  • both contact pieces are movable relative to the screen hood.
  • at least one sliding contact element is to be provided in each case between the first contact piece and the shielding hood and between the second contact piece and the shielding hood.
  • a recess is arranged at least in one of the contact pieces, wel ⁇ che serves a recording of fasteners to produce a composite of the two contact pieces.
  • An introduction of recesses in at least one or both of the contact pieces makes it possible to provide receiving volumes in the contour of the contact pieces in order to be able to receive, for example, bolts or the like.
  • Ring groove to be configured, in which, for example, the heads of mounting bolts are added.
  • the recesses are spanned by the umbrella hood, so that the emergence of discharge phenomena on the body edges of the recess or on the fastening means arranged within the recess is prevented.
  • the shielding hood is a sleeve, in particular with an outer jacket surface tapered conically at the end.
  • a shield hood m the form of a sleeve allows to use ⁇ example, cylindrical, in particular circular cylindrical Kon ⁇ clock pieces, which project into the sleeve so that the sleeve enclosed by a contact point stirnseiti can be formed between the contact pieces.
  • the sle se itself shields and surrounds the contact point, wherein the sleeve is part of a second current path arranged parallel to the first current path.
  • An end conical tapering of the outer circumferential surfaces of the sleeve gives a dielectrically güns term form, so that the front sides of the shield cap ⁇ are electrically disturbed.
  • the screen hood can for example have a cylindrical, in particular ⁇ circular cylindrical outer surface. It can be provided that the outer lateral surface tapers conically towards the end. It can also be provided to use a barrel-shaped curved outer circumferential surface.
  • a further advantageous embodiment may provide that at least one, in particular both contact pieces have an impact on ⁇ which limit movability of the shield cover.
  • a stop on the contact pieces makes it possible to limit the mobility of the umbrella hood. So ⁇ with example, it is possible to set up a lubricious screen ⁇ hood on the contacts and those preventing them an axial movement by stops on the contacts. This only allows movement within the limit given by the stops.
  • a Be ⁇ limitation of the movement can be provided, for example, in a coaxial direction.
  • a stop may be formed, for example, in that a cross-sectional reduction is made at the contact pieces, so that a circumferential shoulder is drawn into the contour of the contact pieces.
  • the transition between the shield cap and contact piece can be additionally dielectrically shielded.
  • a further advantageous embodiment may provide that the shield cover is integrally formed.
  • the shielding hood can be shaped, for example, in the casting process, so that a one-piece surface is provided on the shielding hood, which serves to homogenize electromagnetic fields.
  • the shield cover is advantageously formed in several pieces.
  • a multi-part molding can, for example, take place such that the umbrella hood has a plurality of shells, wherein joining gaps remain between the shells.
  • the joining gaps may have a width such that a sufficient amount of fluid ⁇ de can pass therethrough.
  • Figure 2 shows a second embodiment variant of a Maisan ⁇ order
  • FIG 3 shows a cross section through a third embodiment ⁇ variant of a contact arrangement.
  • FIG. 1 symbolically shows an encapsulating housing 1 in FIG.
  • the encapsulating housing 1 is tubular and has a tube axis 2. Within the encapsulation Housing 1, a first contact piece 3 and a second contact piece 4 are arranged. The two contact pieces 3, 4 are each formed rotationally symmetrical and arranged coaxially to the tube axis 2. Their axes of rotation correspond to the tube axis 2. Alternatively, a deviating position within the encapsulating be provided.
  • a plurality of contact arrangements within one and the same encapsulating housing 1 can also be arranged so as to be electrically insulated from each other, so that a pressurized gas therein serves to electrically insulate the contact arrangements with one another and with respect to the encapsulation housing 1.
  • the two contact pieces 3, 4 have a circular cross-section.
  • the second contact piece 4 passes through an electrical insulator 10a in the form of a pot.
  • the electrical insulator 10a and the second contact piece 4 can be fluid-tightly connected to each other ⁇ .
  • the contact arrangement is positioned inside the encapsulating housing 1 via the electrical insulator 10a.
  • the two contact pieces 3, 4 are aligned coaxially with one another and their end faces touch one another. Between the two end faces a contact point 5 of the electrical contact arrangement is formed. Via the contact point 5, a first current path is formed.
  • the two contact pieces 3, 4 have a mirror-symmetrical design.
  • the two contact pieces 3, 4 have spaced apart from their end faces in each case an annular groove 6a, 6b.
  • the annular groove 6a, 6b runs coaxially around the tube axis 2 and opens in the radial direction.
  • a recess in the two contact pieces 3 may be included in WEL che attachment means for clamping the two blocks Kunststoffstü ⁇ 3 4.
  • aligned cross-recesses are introduced, in which threaded bolts can be inserted to the two contact pieces 3, 4 angle rigid with each other connect to.
  • annular grooves 7a, 7b are arranged on the outer circumference of the two contact pieces 3, 4.
  • An umbrella hood 8 spans the contact point 5, the two annular grooves 6a, 6b and the other annular grooves 7a, 7b in the direction of the tube axis 2.
  • the shield cap 8 is formed in the manner of a sleeve, sleeve openings are complementary in shape to the cross section of the two contact pieces 3, 4 are formed , so that the contact pieces 3, 4 can be gripped by the umbrella cover 8 flush.
  • the outer contour of the shielding cap 8 is selected such that at least to the front ends of the shielding cap 8, a conically sloping jacket region is formed, so that at the front ends of the shielding cap 8 angled body edges are avoided.
  • the entire outer surface of the shielding cap 8 is selected such that at least to the front ends of the shielding cap 8, a conically sloping jacket region is formed, so that at the front ends of the shielding cap 8 angled body edges are avoided.
  • the entire outer surface of the shielding cap 8 is selected such that at least to the front ends of the shielding cap
  • Umbrella hood 8 be designed bulbous rounded.
  • the shield cover 8 a plurality of through holes 9 is ⁇ arranged, which in the assembled condition, the annular grooves 6a, 6b connect to receive the fixing means to the vicinity of the contact ⁇ arrangement.
  • Umbrella cap 8 is moved over the contact point, so that the shield cover 8 with the sliding contact elements, which are inserted in the further annular grooves 7a, 7b in contact ⁇ sets.
  • FIG. 2 shows a second embodiment variant of an electrical contact arrangement, wherein the representation of an encapsulating housing was dispensed with.
  • a connection of the contact arrangement to an electrical insulator 10b is provided.
  • the electrical insulator 10b has a different shape than the electrical insulator 10a shown in FIG.
  • the electrical insulator 10b of FIG. 2 is a disk insulator which extends in a plane.
  • an electrode 11 is inserted. By means of the electrode 11 can be transmitted, an electrical potential through the elekt ⁇ step insulator 10b therethrough.
  • Electrode 11 for example, a contact piece can be connected ⁇ sen.
  • the second contact piece 2 shows 4a a first contact piece 3a and a contact piece two ⁇ tes.
  • the two contact pieces 3a, 4a are formed differently from each other.
  • the two contact pieces 3a, 4a are rotationally symmetrical body with a nikför ⁇ shaped cross section, which is coaxial with a tube axis. 2 extends.
  • the axes of rotation correspond to the tube axis 2.
  • the first contact piece 3a and the second contact piece 4a face each other frontally, wherein between the end faces a contact point 5 is formed.
  • the first contact-piece 3a is equipped with an annular groove 6c, so that fastening means are received in the annular groove 6c Kgs ⁇ NEN which serve an angularly rigid composite of the two contact portions 3a, 4a.
  • the second contact piece 4a has an end face on a circular surface, in which through holes are introduced.
  • the first contact piece 3a has in a flank of the annular groove 6c aligned through ⁇ bores. In the through holes of the edge of the annular groove 6 c bolts are used, which engage in the passage ⁇ holes of the second contact piece 4 a and enforce them completely.
  • the figure 2 shows the possibility of the threaded bolt, which end in the annular groove 6c of the first contact ⁇ piece 3a to let protrude toward ⁇ into threads of the electrode 11 so that the first contact piece 3a with the interposition of the second contact piece 4a against the electrical de 11 is braced, so that a rigid-angle composite zwi ⁇ rule first contact piece 3a and second contact piece 4a is given.
  • the second contact piece 4a has threaded holes, so that a direct clamping of the two contact pieces 3a, 4a is possible.
  • the school ⁇ tern 12 are mirror-symmetrical with respect to the contact point 5 and act as a stop.
  • a flat groove is formed in the composite of the two contact pieces 3a, 4a, in the groove bottom of which the annular groove 6c of the first contact piece 3a opens.
  • further annular grooves 7c, 7d are arranged in the groove bottom of the flat annular groove, which in each case rotate around the tube axis 2 on the outer shell side.
  • a screen hood 8a is inserted in the flat ring groove first and second contact piece 3a, 4a.
  • the shield cover 8a is prevented from axial BEWE ⁇ supply by the oppositely directed shoulders 12 of the two contact portions 3a, 4a.
  • the shield may dome 8a only a rotation around the tube axis 2 vollzie ⁇ hen and limited by the shoulders 12 minimum play in the axial direction run.
  • sliding contact elements for example in the form of elastically deformable contact fingers, contact blades, coil springs, etc., are inserted into the further annular grooves 7c, 7d. In this way, a second current path to the first current path formed over the contact point 5 is realized between the two contact pieces 3a, 4a via the sliding contact elements 7c, 7d and the shielding cap 8a.
  • Is formed can be carried 8a an embodiment of the shield cover such that the shield cover 8a for example, from half-shells is ⁇ quantitative sets together, which are placed from the radial directions between the shoulders 12 and be clamped after a completed insertion against each other, so that a sleeve-shaped shield cover 8a. It can be provided that corresponding joints between the half-shells are designed such that an entry of insulating gas is made possible in the interior of the contact arrangement and thereby a discharge of heat from the interior of the contact arrangement is conveyed.
  • FIG. 3 shows a further first contact piece 3b in cross-section.
  • the further first contact piece 3b has a circular cross-section, wherein at its one further second contact piece end facing by cross-section reduction, a section is formed with a square cross-section.
  • the square section section is shown in FIG.
  • the other second contact piece is designed to slide ⁇ cher way.
  • the outer surface of the flat bars 13 is the rounded ⁇ art that, in cooperation with the cross-section reduced portion ⁇ a circular cross section is formed.
  • the portions of the further first and further second contact piece 3b of square cross section are mitein ⁇ other electrically conductive contact.
  • the flat bars 13 span over the contacting point of the further first contact piece 3b and the further second contact piece and form a parallel current path.
  • the flat rails 13 act as a screen hood.
  • elastically deformable contact elements can be arranged between the flat rails 13 and the further contact pieces, for example.

Abstract

L'invention concerne un système de mise en contact électrique comportant un premier élément de contact (3, 3a) ainsi qu'un deuxième élément de contact (4, 4a). En réalisant un site de contact (5), les deux éléments de contact (3, 3a, 4, 4a) sont mis en contact de façon à conduire l'électricité. Le site de contact (5) est entouré d'un capot de blindage (8, 8a). Un premier circuit de courant passant à travers le site de contact (5) et un deuxième circuit de courant passant à travers le capot de blindage (8, 8a) sont réalisés entre les deux éléments de contact (3, 3a, 4, 4a)
PCT/EP2012/053980 2011-03-17 2012-03-08 Système de mise en contact électrique WO2012123323A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011005700A DE102011005700A1 (de) 2011-03-17 2011-03-17 Elektrische Kontaktanordnung
DE102011005700.5 2011-03-17

Publications (1)

Publication Number Publication Date
WO2012123323A1 true WO2012123323A1 (fr) 2012-09-20

Family

ID=45952462

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/053980 WO2012123323A1 (fr) 2011-03-17 2012-03-08 Système de mise en contact électrique

Country Status (2)

Country Link
DE (1) DE102011005700A1 (fr)
WO (1) WO2012123323A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2903090A1 (fr) 2014-01-31 2015-08-05 Siemens Aktiengesellschaft Conducteur électrique
DE102015211947A1 (de) * 2015-06-26 2016-12-29 Siemens Aktiengesellschaft Strombahnkontaktierungssystem

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016203481A1 (de) 2016-03-03 2017-09-07 Siemens Aktiengesellschaft Demontage- oder Montageverfahren für eine druckfluidisolierte Elektroenergieübertragungseinrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574781A (en) * 1947-12-22 1951-11-13 Thomas & Betts Corp Bus bar connector
US3646245A (en) * 1970-12-16 1972-02-29 Gen Electric Liquid-cooled bus containing a disconnecting link
JPS54162883U (fr) * 1978-05-08 1979-11-14
JPS60170174A (ja) 1984-02-14 1985-09-03 住友電気工業株式会社 ガス絶縁機器の導体の接続構造
US4721829A (en) * 1986-12-08 1988-01-26 Westinghouse Electric Corp. Gas insulated transmission line with shielded electrical joint assembly
JPH0556528A (ja) * 1991-08-27 1993-03-05 Toshiba Corp 導体接続装置
GB2328087A (en) * 1997-06-26 1999-02-10 B & H Ltd Connection for high voltage

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3526918A1 (de) * 1985-07-25 1987-01-29 Siemens Ag Kuppelkontaktstueck fuer eine steckverbindung zwischen zwei zylindrischen leitern einer gekapselten, druckgasisolierten hochspannungsschaltanlage
DE19604485A1 (de) * 1996-02-08 1997-08-14 Asea Brown Boveri Verbindungsstück für zwei Abschnitte eines hochspannungsführenden Stromleiters

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574781A (en) * 1947-12-22 1951-11-13 Thomas & Betts Corp Bus bar connector
US3646245A (en) * 1970-12-16 1972-02-29 Gen Electric Liquid-cooled bus containing a disconnecting link
JPS54162883U (fr) * 1978-05-08 1979-11-14
JPS60170174A (ja) 1984-02-14 1985-09-03 住友電気工業株式会社 ガス絶縁機器の導体の接続構造
US4721829A (en) * 1986-12-08 1988-01-26 Westinghouse Electric Corp. Gas insulated transmission line with shielded electrical joint assembly
JPH0556528A (ja) * 1991-08-27 1993-03-05 Toshiba Corp 導体接続装置
GB2328087A (en) * 1997-06-26 1999-02-10 B & H Ltd Connection for high voltage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2903090A1 (fr) 2014-01-31 2015-08-05 Siemens Aktiengesellschaft Conducteur électrique
DE102015211947A1 (de) * 2015-06-26 2016-12-29 Siemens Aktiengesellschaft Strombahnkontaktierungssystem

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