EP3143671A1 - Ensemble télescopique pour dispositif de transmission d'énergie électrique - Google Patents

Ensemble télescopique pour dispositif de transmission d'énergie électrique

Info

Publication number
EP3143671A1
EP3143671A1 EP15730133.4A EP15730133A EP3143671A1 EP 3143671 A1 EP3143671 A1 EP 3143671A1 EP 15730133 A EP15730133 A EP 15730133A EP 3143671 A1 EP3143671 A1 EP 3143671A1
Authority
EP
European Patent Office
Prior art keywords
section
cylinder
sections
cylinder sections
arrangement according
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP15730133.4A
Other languages
German (de)
English (en)
Inventor
Steffen Rautenberg
Markus Schmidtke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP3143671A1 publication Critical patent/EP3143671A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H02G5/061—Tubular casings

Definitions

  • the invention relates to a telescoping arrangement comprising a first cylinder section and a second cylinder section which, forming an overlapping section, telescopically overlap one another.
  • a telescoping arrangement is known, which has a first and a second cylinder portion.
  • the two cylinder sections are telescopically connected to each other and form a Studentslappungsasacrificing.
  • the known telescopic arrangement provides for holding the cylinder sections at their ends facing away from the overlapping section and for allowing them to overlap telescopically.
  • support insulators are used. These support the overlapping section on a housing surrounding the cylinder sections. An assembly of the cylinder sections and an additional mounting of the support insulators lead to an increased assembly costs. Therefore, it is an object of the invention to provide a telescoping arrangement which can be mounted in a simplified manner.
  • the object is achieved in a telescoping arrangement of the type mentioned above in that a fixing device for determining the position of the first and second cylinder sections engages relative to one another in the overlapping section.
  • a telescoping arrangement is a device which has at least one first and one second cylinder section. At least one cylinder section should be equipped with a pipe channel into which the other cylinder section can dip.
  • the pipe channel can be defined by a hollow be formed cylinder.
  • the cylinder sections may be designed as pipe sections, which in particular have stepped cross sections.
  • the cylinder sections can each be equipped with a pipe channel, wherein the cross section of the cylinder sections can vary.
  • Pipe channels of the cylinder sections may be interconnected via the overlap section.
  • At least one, in particular both cylinder sections can, for. B. have substantially circular cross-sections.
  • other hollow cylindrical cross-sectional shapes such as elliptical, polygonal cross sections, etc. are available.
  • the cylinder sections are connected to one another, the cylinder sections being telescopic relative to one another, ie the two cylinder sections are displaceable relative to one another in the longitudinal direction, preferably in the direction of a hollow cylinder axis, so that a length-variable overlapping section of the telescopic arrangement is formed.
  • a telescoping cylinder section engages around the other cylinder portion, wherein the engaged cylinder portion dips into the encompassing cylinder portion.
  • the cylinder sections can support each other in the overlapping area.
  • the overlapping area guides a relative movement of the cylinder sections in the direction of the cylinder axes, whereby an angular movement can be suppressed.
  • the overlap region can preferably be formed from parts of the cylinder sections.
  • the overlapping section may connect pipe passages of the cylinder sections with one another such that, for example, a fluid can pass from a pipe channel of the first cylinder section into a pipe channel of the second cylinder section.
  • An overlap portion may represent a point of discontinuity within a telescoping assembly.
  • an inner contour and / or an outer contour of the telescoping arrangement may change in the overlapping section.
  • the overlapping section can be formed at least partially from the first and at least partially from the second cylinder section.
  • the cylinder sections may have separately shaped zones.
  • a support and support of the cylinder sections can be supported via the overlapping portion.
  • a support device of the one cylinder section to also develop a supporting function for the other cylinder section. Due to the determination of the cylinder sections on the fixing an axial displacement of the cylinder sections is limited to each other, in particular prevented.
  • mount the first and the second cylinder section in a simple manner. For example, for mounting the cylinder sections have an enlarged overlap in the overlapping section and are offset by a reduction in the overlap in their final position after a move to a mounting position and are set relative to each other after reaching the end position on the fixing device.
  • a telescoping arrangement according to the invention is also suitable for compensating for tolerances. This eliminates the need for compensation or intermediate pieces, which in one
  • Telescoping would be inserted to compensate for tolerances.
  • the fixing device By using the fixing device in the overlapping section, forces can be transmitted via this overlapping section. For example, pressing forces can be achieved by the fixing device, so that the friction between the two cylinder sections is increased.
  • Lappungsabterrorism abut both portions of the first cylinder portion and portions of the second cylinder portion to each other.
  • the fixing device unfolds a substantially radially oriented clamping force between the first and second cylinder section.
  • a radially directed clamping force relates to a movement axis of the cylinder sections which are movable relative to one another.
  • a movement axis preferably runs parallel to a cylinder axis.
  • a surface-sized interference fit between the first and second cylinder sections can be achieved.
  • Clamping forces should preferably be transmitted over mutually facing lateral surface areas of the two cylinder sections.
  • an outer shell side cylinder portion overlap region may be pressed against an inner shell side cylinder portion overlap region.
  • the inner peripheral side cylinder portion overlapping portion can be pressed against the outer shell side cylinder portion overlapping portion.
  • a bracing can be caused for example by screwing, riveting, chuck and the like.
  • the zones of the cylinder sections, which form the overlapping section can also be provided with corresponding shapes in order to support a bracing.
  • the facing surface regions of the first and second cylinder sections may be provided with a profiling in the area of the overlapping section, so that bracing or fixing of the two cylinder sections is assisted by a profiled surface.
  • the hollow cylinder walls can fertilize completely bolted and pressed against each other with bolts.
  • a further advantageous embodiment can provide that the fixing device acts as a telescopic path boundary.
  • the first and second cylinder portions form an overlapping portion.
  • a telescoping of the two cylinder sections relative to one another is made possible. It can happen that the cylinder sections dive too deeply into each other and thus the overlapping section undesirably large, or that the cylinder sections are pulled too far apart, whereby the overlapping section is weakened or even dissolved.
  • the stability of the telescoping arrangement may suffer.
  • too low immersion depth for example, mechanical or electrical properties of the
  • Telescoping arrangement can not be guaranteed.
  • a change in length of the telescopic arrangement can be permitted by relative movement of the cylinder sections within defined limits.
  • a Teleskopwegbegrenzung can only act on one side, so ensure a maximum immersion depth or a minimum immersion depth. Further, a Teleskopwegbegrenzung also be performed on both sides.
  • a Teleskopwegbegrenzung can, especially in the unfixed state, hold an overlap of the cylinder sections in allowable ranges.
  • the fixing device can, after clamping the same, determine the position of first and second
  • Cylinder section serve each other.
  • a useful use of the fixing device for stabilization of the telescoping arrangement can also take place with the taking of the final assembly position and a fixing of the positioning device after the assembly has taken place.
  • At least one of the cylinder sections has a stop limiting a relative movement between the first and second cylinder sections.
  • a cylinder section may have a shoulder against which the other cylinder section and / or part of a fixing device abuts, so that telescoping capability of the cylinder sections is limited. For example, can be prevented by a stop movement of the cylinder sections with resolution of the overlapping portion. Furthermore, an immersion depth can be limited by a stop.
  • tensioning means for example bolts
  • the cylinder portion itself, for example, has recesses or shoulders, which as a stop z. B. serve for the fixing device for Verspannstoff or for another cylinder section.
  • a further advantageous embodiment can provide that the fixing device acts as anti-rotation.
  • a further advantageous embodiment can provide that at least one of the cylinder sections has a guideway, which forces a positive guidance of the cylinder sections relative to one another.
  • a guideway may, for example, be designed as a recess or a protruding shoulder on one of the cylinder sections.
  • a lateral surface of at least one of the cylinder sections may be provided with a corresponding profiling, so that while a relative movement of the cylinder sections is permitted to enable telescoping thereof, the guide track defines the manner of telescoping the cylinder sections sliding along one another ,
  • the guideway can allow a linear displacement between the cylinder sections, wherein the guideway can also serve as anti-rotation and / or stop.
  • a further advantageous embodiment can provide that between the two cylinder sections an electrical contacting arrangement, in particular a sliding contact is arranged.
  • an electrical contacting arrangement By using an electrical contacting arrangement, it is possible to apply the same electrical potential to the two cylinder sections. In order for discharge phenomena between the cylinder sections, as they could arise, for example, in a relative movement thereof, avoided. Furthermore, in the fixed state of the cylinder sections relative to one another, a defined path of a flow path can be set up via the electrical contacting arrangement, so that, for example, an electric current can also be conducted between the cylinder sections over the overlapping area with little loss.
  • the contacting arrangement can be configured, for example, as part of the fixing device. However, it can also be provided that the fixing device and the contacting arrangement develop their function independently of each other.
  • a sliding contact may be provided, which should be located in particular in the overlapping section.
  • an elastically deformable element may be arranged there, which may be designed discretely or formed as an integral part of at least one of the cylinder sections.
  • contacting fingers, contact springs, etc. can be positioned in a joint gap between facing surfaces of the first and second cylinder sections in the overlapping area. It is advantageous if a Teleskopwegbegrenzung is effective, so that regardless of the immersion depth of the cylinder sections, an electrical contacting of the cylinder sections on the contacting arrangement sure can be and unintentional dissolution of electrical contact is difficult.
  • electrical contacting of the same can be advantageous for safety reasons.
  • an electrical grounding of the cylinder sections can be provided.
  • the fixing device can be used to allow a contact pressure force to act on the contacting arrangement.
  • a further advantageous embodiment can provide that at least the first cylinder section has a first cross-section and a similar cross-section-larger second cross-section.
  • a cylinder section can be provided to equip a cylinder section with a plurality of cross sections. It is particularly advantageous to use similar cross-sections, with their dimensions differ from each other.
  • it may be provided to form a cylinder section, for example in a stepped manner, so that a radially widening body edge forms at the transition between a first cross section and a second cross section.
  • an inner or outer shell side projecting annular shoulder may be formed. This body edge can for example be used to limit the immersion depth of the cylinder sections in the overlapping region.
  • Cross-sectional change has the advantage that, for example, an overlapping section is provided on the first cylinder section in the region of the first section having a smaller diameter, such that in the case of telescoping with a second cylinder section, the overlapping area between the first and the second cylinder section is the envelope contour (which is preferably determined by the cross-sectional larger cross-section).
  • the telescoping arrangement does not increase and preferably remains approximately constant.
  • Each of the similar cross sections can in turn form cylindrical, in particular hollow cylindrical sections on the cylinder section.
  • a further advantageous embodiment can provide that the first cross-section and the second cross-section are formed in opposite directions such that they would each be suitable for forming a telescoping overlap section.
  • first and second cross-section of one and the same cylinder section By an opposite shaping of the first and second cross-section of one and the same cylinder section, a modular construction of a telescopic arrangement can be provided.
  • the dimensioning of the first and second cross sections on one and the same cylinder section makes it possible to arrange the first cylinder section at both front ends to form an overlapping section.
  • a further advantageous embodiment can provide that the cylinder sections are electrically active phase conductors of an electric power transmission device, in particular a gas-insulated switchgear.
  • An electric power transmission device is a device which serves to transmit electrical energy.
  • an electrically active phase conductor is used, which is arranged electrically isolated from other electrically active or electrically passive elements.
  • a gas is used for electrical insulation of the electrically active phase conductor.
  • the electrically active phase conductor is enclosed in an encapsulation in order to prevent volatilization of the electrically insulating gas flowing around it.
  • the encapsulation can be made fluid-tight and optionally serve as a pressure vessel in order to be able to pressurize the electrically insulating gas.
  • a contact pressure force can be applied, which ensures electrical contacting of the cylinder sections.
  • tolerances can be compensated by telescoping, so that special designs of electrically active phase conductors are superfluous. If one now uses the fixing device for fixing the position on an electrically active phase conductor, then it is possible on the one hand to fix cylinder sections of the electrically active phase conductor to one another.
  • a contact pressure force can also be generated in order to reduce the contact contact resistance between the first and the second cylinder section.
  • a further advantageous embodiment can provide that the cylinder sections are part of an electrically active phase conductor of an electric power transmission device, in particular a gas-insulated switchgear, surrounding encapsulation.
  • a gas-insulated switchgear uses a gas to electrically isolate an electrically active phase conductor. For this purpose, it is necessary to make it difficult to influence the electrically insulating gas.
  • the encapsulation may be embodied in a fluid-tight manner so that electrically insulating gas located inside the encapsulation is protected against volatilization or mixing with further gas volumes which could possibly influence the insulating properties of the electrically insulating gas.
  • a further advantageous embodiment can provide that a plurality of overlapping sections are arranged consecutively between cylinder sections in a derailleur.
  • a chain connection of several overlapping sections makes it possible to enlarge a telescopic lift, which can only be realized to a limited extent at an overlapping section, by a series connection (chain connection) of several overlapping sections.
  • a series connection chain connection of several overlapping sections.
  • the series connection of a plurality of overlapping sections may also result in lateral or angular compensation at the
  • Telescoping be made.
  • the cylinder sections In the unfixed state of the fixing devices acting on the respective overlapping sections, the cylinder sections can be aligned flexibly relative to one another.
  • the chain connection of the overlapping sections allows relative movements to be added between the cylinder sections, so that a flexible telescoping arrangement is provided during assembly, which can be aligned in a rigid angle after reaching its final position by means of fixing devices acting in overlapping sections.
  • the figure shows a cross section through a
  • Telescoping arrangement comprising a first cylinder portion and a second cylinder portion.
  • the figure shows a cross section through an electric power transmission device.
  • the electric power transmission device is configured as a pressure gas-insulated electric power transmission device.
  • the electric power transmission device has an encapsulating housing 1.
  • the capsule housing 1 is of tubular design, wherein the encapsulating housing 1 has a substantially annular cross-section.
  • the encapsulating housing 1 has a cylinder axis 2.
  • a support insulator 3 is arranged at the front side.
  • the support insulator 3 closes off the encapsulating housing 1 at the end, so that a communication of a fluid, which is arranged in the interior of the encapsulation housing 1, with the environment is prevented there.
  • the interior of the encapsulating housing 1 is filled with an electrically insulating fluid, in the present case an electrically insulating gas such as sulfur hexafluoride, nitrogen, carbon dioxide or other suitable gases or gas mixtures.
  • an electrical phase conductor 4 is arranged within the encapsulating housing 1 of the electrical energy transmission device. The phase conductor 4 is electrically contacted with its one end face with a fitting body 5, and arranged mechanically supported on this.
  • the fitting body 5 is let into the support insulator 3 in a fluid-tight manner, which is designed as a so-called disk insulator. Accordingly, in the case of a fluid-tight design of the disk insulator, the encapsulating housing 1 can be closed at the end, wherein a phase conductor 4 can transmit an electrical potential through a wall (in this case support insulator 3) of the encapsulating housing 1 via the electrically conductive valve body 5.
  • the phase conductor 4 is arranged electrically insulated from the encapsulation housing 1 by the electrically insulating gas or the support insulator 3.
  • the encapsulating housing 1 can be made electrically conductive and lead, for example, ground potential.
  • the phase conductor 4 has a first cylinder section 6 and a second cylinder section 7.
  • the first and the second cylinder section 6, 7 are of similar construction, so that identical parts can be used to form the phase conductor 4.
  • the cylinder section 6 has annular cross-sections, the first cylinder section 6 having a first step 8 and a second step 9. At the first and at the second stages 8, 9 is a
  • the first cylinder section 6 has a circular cylindrical outer surface. Between the two stages 8, 9, the first cylinder section 6 is equipped with a first cross-section 10.
  • the first cross-section 10 is annular.
  • the first step 9 is adjoined by a second section 11, which extends up to a first end 12.
  • the cross sections of the first section 10 and the second section 11 are each configured annular, so that the cross sections of the first section 10 and the second section 11 are similar.
  • a third section 13 extends, which extends up to a second front end 14 of the first cylinder section 6.
  • the third section 13 also has an annular cross section, so that the third section 14 is similar to the first section 10 and the second section 11.
  • an outer circumferential side annular shoulder on the first cylinder section 6 is formed in each case.
  • an inner shell side gradation of the wall on the first cylinder section 6 is provided.
  • an annular peripheral shoulder is also on the inner shell side, wherein the outer shell side and inner shell side circumferential shoulders with respect to the cylinder axis 2 coaxially aligned in opposite directions.
  • the annular circumferential shoulders both outside and inside sheath side can be used as stops for limiting the depth of immersion of the cylinder sections 6, 7.
  • the first portion 10 and the third portion 13 are part of a Kochlappungsab- section, which is formed between the first cylinder portion 6 and the second cylinder portion 7.
  • an outer circumferential groove 15 is arranged in the first portion 10 adjacent to the second staging.
  • a contact element here in the form of a curved around the cylinder axis 2 circumferential coil spring, is inserted to form an electrical contacting arrangement.
  • the contact element contacts the groove bottom or the groove walls of the groove 15 and on the other hand an inner circumferential surface of a second section IIa of the second cylinder section 7 (the indexing "a" indicates the reference numerals of the like elements of the second cylinder section 7, which already belong to the first
  • the contact element is elastically deformed, so that an electrical contacting arrangement is formed between the first and the second cylinder sections 6, 7.
  • it is a sliding contact arrangement, since telescoping of the The first cylinder section 6 relative to the second cylinder section 7 is a permanent electrically conductive bond between the two Zylinderabschnit- 6, 7 given.
  • a plurality of clamping bolts 16 are arranged distributed on the circumference of the first cylinder section 6.
  • the clamping bolts 16 engage in the radial direction through the wall of the first cylinder section 6 in the region of the first section 10.
  • the clamping bolts 16 protrude into a recess 17.
  • the recess 17 is designed in the manner of an oblong hole, which passes through the jacket wall of that section (end section 18) which is encompassed by the second section 11 or the first section 10 of the first cylinder section 6.
  • Analogous recesses 17 can be found in the third section 13 of the first cylinder section 6 and in the third section 13a of the second cylinder section 7.
  • the first section 10 surrounds or the second portion 11 of the first cylinder portion 6 an end portion 18 of the phase conductor 4.
  • the end portion 18 is connected to the valve body 5 angularly fixed and electrically contacted with him.
  • the end section 18 is a modification of the first or second cylinder section 6, 7, wherein a section acting analogously to the respective second section 11, IIa is closed by a ring plate 19, so that an angularly rigid screwing of the end section 18 is possible with the fitting body 5 lent.
  • the clamping bolts 16 protrude into the respective recesses 17 which are linearly stretched, aligned parallel to the cylinder axis 2. Accordingly, by the clamping bolt 16, which act as part of a fixing, on the one hand, a rotation of the cylinder sections 6, 7 and the end portion 18 is formed. On the other hand, the clamping bolts 16 act as a stop, in order to ensure a limitation of the immersion depths of the overlapping cylinder sections 6, 7 and of the end section 18. In order to limit the immersion depth, it is also possible to use the inner shoulders or outer jacket side in the region of the steps 8, 9, 8a, 9a on the inner and outer shell side projecting annular shoulders as a stop, which can abut each opposite body edges.
  • Sliding elements 20 may be arranged, which are present in the form of a ring.
  • the sliding elements 20 are inserted in réellemantel- incorporated grooves.
  • annular sliding elements 20 made of a plastic can be used, which realize a smooth relative movement between the cylinder sections 6, 7 or the end section 18.
  • the sliding elements are axially spaced from each other in different sections 10, 13, 10a, 13a, so that a verkippungsarmes sliding of the cylinder sections 6, 7 and the end portion 18 is supported relative to each other.
  • the clamping bolts 16 of the fixing device are released, so that a smooth Relativbewegbar- speed of the cylinder sections 6, 7 and the end portion 18 along the cylinder axis 2 is possible.
  • the possibility is given to reduce the axial extent of the telescoping arrangement, in order to enable simplified assembly by improved handling.
  • a final assembly position can be achieved, whereupon the clamping bolts 16 of the fixing device are clamped, so that a rigid connection in the region of the overlapping section between the cylinder sections 6, 7 or the end section 18 is achieved, so that a rigid telescoping arrangement is given.
  • the clamping bolts 16 clamp the overlapping walls of the cylinder sections 6, 7 or of the end section 18 and increase the friction between them.
  • the telescoping arrangement can encompass a volume in the interior of which, for example, a phase conductor can also be positioned in an electrically insulated manner relative to the telescoping arrangement that encompasses the volume.
  • both the encapsulating housing 1 and the phase conductor 4 may be made telescopic according to the invention, so that, for example, to Mounting purposes or to compensate for tolerances both area of the encapsulating 1 and in the region of the senleiters 4 an axial length compensation is possible.

Landscapes

  • Actuator (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

L'invention concerne un ensemble télescopique comprenant une première partie cylindrique (6) et une deuxième partie cylindrique (7). Une partie de chevauchement, dans laquelle les parties cylindriques (6, 7) se chevauchent de manière télescopique, est formée entre les parties cylindriques (6, 7). Pour fixer la position de la première et de la deuxième partie cylindrique (6, 7) l'une par rapport à l'autre, un dispositif de fixation réalise une action dans la partie de chevauchement.
EP15730133.4A 2014-07-14 2015-06-17 Ensemble télescopique pour dispositif de transmission d'énergie électrique Withdrawn EP3143671A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014213612.1A DE102014213612A1 (de) 2014-07-14 2014-07-14 Teleskopieranordnung
PCT/EP2015/063553 WO2016008667A1 (fr) 2014-07-14 2015-06-17 Ensemble télescopique pour dispositif de transmission d'énergie électrique

Publications (1)

Publication Number Publication Date
EP3143671A1 true EP3143671A1 (fr) 2017-03-22

Family

ID=53434337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15730133.4A Withdrawn EP3143671A1 (fr) 2014-07-14 2015-06-17 Ensemble télescopique pour dispositif de transmission d'énergie électrique

Country Status (4)

Country Link
EP (1) EP3143671A1 (fr)
CN (1) CN106463937A (fr)
DE (1) DE102014213612A1 (fr)
WO (1) WO2016008667A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11268640B2 (en) * 2018-06-28 2022-03-08 Kohler Co. Adjustable-length water supply adapter

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US2835723A (en) * 1954-12-06 1958-05-20 Porter Co H K Telescopic inspection sections for bus enclosures
US3038022A (en) * 1958-01-31 1962-06-05 Ite Circuit Breaker Ltd Inflatable gasket for isolated phase bus
JPS61254009A (ja) * 1985-04-30 1986-11-11 株式会社日立製作所 ガス絶縁開閉装置の切り離し部の構造
JPH1169580A (ja) * 1997-08-28 1999-03-09 Toshiba Corp 着脱母線
US6368084B1 (en) * 2000-02-01 2002-04-09 Skillman Pump Company, Llp Downstroke sucker rod well pump
DE102008011042A1 (de) * 2008-02-22 2009-08-27 Siemens Aktiengesellschaft Druckbehälteranordnung mit einem Kompensationsbalg
CN201838817U (zh) * 2010-08-04 2011-05-18 吕月琼 连接器的结构改良
EP2501002B1 (fr) * 2011-03-15 2014-11-26 ABB Technology AG Module de montage transversal pour une installation de commutation
CN203135095U (zh) * 2013-01-31 2013-08-14 广州番禺电缆集团有限公司 电缆线接地部位防水、防潮装置

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Title
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Also Published As

Publication number Publication date
WO2016008667A1 (fr) 2016-01-21
CN106463937A (zh) 2017-02-22
DE102014213612A1 (de) 2016-01-14

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