WO2011037407A2 - Câble de prévention de décharge - Google Patents

Câble de prévention de décharge Download PDF

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Publication number
WO2011037407A2
WO2011037407A2 PCT/KR2010/006501 KR2010006501W WO2011037407A2 WO 2011037407 A2 WO2011037407 A2 WO 2011037407A2 KR 2010006501 W KR2010006501 W KR 2010006501W WO 2011037407 A2 WO2011037407 A2 WO 2011037407A2
Authority
WO
WIPO (PCT)
Prior art keywords
cable
insulation layer
dielectric
conductor
power cable
Prior art date
Application number
PCT/KR2010/006501
Other languages
English (en)
Other versions
WO2011037407A3 (fr
Inventor
Nam Pyo Suh
Soon Heung Chang
Dongho Cho
Gyu Hyeong Cho
Chun Taek Rim
Yong Hoon Jeong
Jong Woo Kim
Jin Huh
Joo Young Choi
Yun Ho Kim
Jung Goo Cho
Ho Sub Son
Doo Ik Song
Original Assignee
Korea Advanced Institute Of Science And Technology
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 Korea Advanced Institute Of Science And Technology filed Critical Korea Advanced Institute Of Science And Technology
Publication of WO2011037407A2 publication Critical patent/WO2011037407A2/fr
Publication of WO2011037407A3 publication Critical patent/WO2011037407A3/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/16—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0225—Three or more layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration

Definitions

  • the present invention relates to a discharge prevention cable, and more particularly, to a power cable capable of preventing discharge from being occurred on the surface thereof at a high frequency and a high voltage by controlling a high electric field formed around the power cable buried in the ground.
  • a power cable used for a high voltage of several kV or more is designed to be suitable for 50 or 60 Hz which is a frequency of a commercial power source, and a power cable for a high frequency is used only for a special purpose.
  • Fig. 1 is a plan view of a pair of power cables employed in a power supply device for use in an on-line electric vehicle.
  • a power cable 5 is embedded in a road, and cable support members 6 are installed at a distance from one another in a direction perpendicular to the power cable 5.
  • the cable support member 6 may be a core unit of a power supply device for use in an on-line electric vehicle, a member for supporting the core unit, a member inserted between the core unit and the power cable, or soil on the road in which the power cable is buried. Such a cable support member 6 may be conductive due to rain, muddy water, or moisture.
  • a term used herein, 'GO' refers a direction through which the current flows in a longitudinal of a road
  • 'RETURN' refers to a direction through which the current flows in the opposite direction.
  • Fig. 2 is a diagram illustrating an example of arc discharge generated in a high-frequency, high-voltage power cable.
  • One of examples of the high-frequency, high-voltage power cables is disclosed in U.S. Patent Number 5, 777,273.
  • a power cable 10 includes a conductor 8, e.g., a Litz wire and a layer of an insulation coating 9 and is placed on a cable support member 7.
  • the cable support member 7 may be a core unit of a power supply device for use in an on-line electric vehicle, a member for supporting the core unit, a member inserted between the core unit and the power cable, or soil on the road in which the power cable is buried.
  • Such a cable support member 7 may be conductive due to rain, muddy water, or moisture.
  • An arc discharge 11 may occurs between the surface of the power cable 10 and the cable support member 7.
  • an arc discharge does not occur.
  • an arc discharge may occur when the power cable is buried in the road or installed in an open field. Such an arc discharge causes a fire to break out on the surface of the cable, and destroy the insulation coating 9 of the power cable. As a result, the power cable may not operate normally any more.
  • Such a case in which the power cable buried in the ground is damaged is totally different from a case in which the power cable is damaged due to heat generated by an over current, a case in which the power cable is damaged by insulation breakdown due to a voltage exceeding an dielectric voltage withstand, or a case in which the power cable is damaged due to low insulation resistance and heat generated by a high leakage current.
  • Fig. 3 is a diagram explaining a phenomenon causing an arc charge in high-frequency high-voltage power cables.
  • a capacitance Cc-c is normally formed between the power cables.
  • Each power cable 16 has an insulation coating capacitance C1 between a conductor 14, e.g., a Litz wire and an insulation coating 15. Therefore, a high-frequency current may flow between the power cables through a cable support member 13.
  • an air gap capacitance Ca is serially connected as shown in Fig. 3. If the frequency and voltage increase even though the capacitance values are small, a significant current may flow between the power cable 16 and the cable support member 13.
  • the power cable has an insulation coating capacitance C1 of 0.5 nF/m.
  • a frequency (fs) is 20 kHz and a voltage (Vs) of 1 kV is applied to the capacitor C1
  • a high-frequency current flowing per 1m may be calculated as follows.
  • the above-described current flows per 1 m in the power cable.
  • the air gap capacitance Ca becomes smaller than the insulation coating capacitance C1. Then, a voltage applied between the two power cables is mostly applied to the air gap.
  • the voltage Va applied to the air gap may be calculated as follows.
  • an electric field applied to the air gap may exceed 0.8-3 kV/mm, which leads to an insulation breakdown. If a voltage of 2 kV is applied across the power cable and if the air gap is less than 0.67 mm, the voltage is mostly applied to the air gap to cause an arc discharge. Once the arc discharge occurs, an air-gap voltage drops to about 100V which is an arc discharge voltage, and a current flowing the air gap is limited by a capacitance of C1/2 and a voltage applied across the power cable. For example, when the voltage applied across the power cable is 2 kV, a current of about 63 mA flows per 1 m in the power cable (in this case, ohmic resistance of the cable support member is ignored).
  • Fig. 4 is a photograph showing an example of a power cable damaged by an actual high-frequency high-voltage arc discharge.
  • a cable support member such as a plastic pipe and.
  • a weak arc discharge or corona discharge may also occur even in a low-frequency, low-voltage, or dry environment.
  • the power cable may be burned and damaged even in a condition in which the frequency is 60 Hz, the voltage is 100 V, and the humidity is 0%. Nevertheless, the scale or shape of the damage is too small to be observed since the surface of the power cable is slowly damaged over a long time, and therefore, the cause of the damage is difficult to find out.
  • Such a discharge phenomenon may also occur in a signal cable which uses a low voltage and to which a high-frequency or switching voltage is applied.
  • the present invention provides a power cable capable of preventing an arc discharge from being occurred on the surface thereof through a capacitive current at a high frequency and a high voltage.
  • the present invention provides a power cable capable of preventing a minute arc discharge or corona discharge from being occurred at a low-frequency and a low-voltage.
  • a cable for preventing discharge caused by capacitive current including: a conductor; a first insulation layer covering the conductor; a low-dielectric insulation layer covering the first insulation layer; and a second insulation layer covering the low-dielectric insulation layer.
  • a pair of cables having opposite polarity and arranged at a predetermined distance each other for preventing discharge caused by capacitive current, each of the cable including: a conductor; an insulation layer covering the conductor; and a high-dielectric exterior cover enclosing the insulation layer.
  • a cable for preventing discharge caused by a capacitive current, inclduing a conductor; a first insulation layer covering the conductor; and a ring-shaped second insulation layer covering the first insulation layer at each predetermined distance.
  • a cable for preventing discharge caused by capacitive current including: a conductor; an insulation layer covering the conductor; a metal layer covering the insulation layer; and a conductive connection line connected to the metal layer.
  • the electric field in the cable is lower than an insulation breakdown electric field strength even under a high-frequency and high-voltage condition. Therefore, the cable is not damaged and may be used safely even in an environment where an inflammable or explosive material exists.
  • the cable is not damaged even though an arc discharge occurs under a high-frequency and high-voltage condition or a low-frequency and low-voltage condition.
  • Fig. 1 is a plan view of a pair of power cables employed in a power supply device for use in an on-line electric vehicle;
  • Fig. 2 is a diagram illustrating an example of arc discharge generated in a high-frequency high-voltage power cable
  • Fig. 3 is a diagram explaining a phenomenon causing an arc charge in high-frequency high-voltage power cables
  • Fig. 4 is a photograph showing an example of a power cable damaged by an actual high-frequency high-voltage arc discharge
  • Fig. 5 is a front view of a power cable adapted for preventing an arc discharge from being occurred at a high frequency and a high voltage in accordance with an embodiment of the present invention
  • Fig. 6 is a plan view of a pair of power cables enclosed with a high-dielectric exterior cover in accordance with another embodiment of the present invention.
  • Fig. 7 is a detailed diagram of the high-dielectric exterior coating shown in Fig. 6;
  • Fig. 8 is a front view of a power cable having a heat-resistant insulation coating in accordance with another embodiment of the present invention.
  • Fig. 9 is a diagram illustrating a power cable having a metal coating provided thereon in accordance with another embodiment of the present invention.
  • Fig. 5 is a front view of a power cable adapted for preventing an arc discharge from being occurred at a high frequency and a high voltage in accordance with an embodiment of the present invention.
  • a power cable 22 is placed on a cable support member 17 with a predetermined air gap.
  • the cable support member 17 may be a core unit of a power supply device for use in an on-line electric vehicle, a member for supporting the core unit, a member inserted between the core unit and the power cable, or soil on the road in which the power cable is buried.
  • Such a cable support member 17 may be conductive due to rain, muddy water, or moisture.
  • the power cable 22 includes a conductor 18, e.g., a Litz wire, a layer of a primary insulation coating 19, a layer of a low-dielectric insulation coating 20 and a layer of a secondary insulation coating 21 which are covered in sequence.
  • the low-dielectric insulation coating 20 has a dielectric constant approximate to 1 which is a relative dielectric constant of the air. Such dielectric constant permits the electric field strength of the power cable 22 to be equal to or less than the insulation breakdown electric field strength of the air inside and outside the power cable 22, regardless of an air gap between the cable support member 17 and the power cable 22. The reason will be described in more detail as follows.
  • ⁇ represents a dielectric constant
  • d represents the thickness of the insulation coating or the air gap. If a variation in the infinitesimal area caused by a diameter difference between the respective insulation coatings is ignored, a voltage Va at the air gap may be approximately calculated below according to voltages divided by the respective capacitances.
  • Va (1/C ⁇ )/(1/C1 + 1/C ⁇ + 1/C2 + 1/C ⁇ ) * Vs
  • C1 is primary insulation coating capacitance
  • C ⁇ is low-dielectric insulation coating capacitance
  • C2 is secondary insulation coating capacitance
  • C ⁇ is air gap capacitance
  • Vs represents a voltage applied between the conductor 18 and the cable support member 17. Accordingly, the electric field strength Ea at the air gap may be expressed as follows.
  • Va/d ⁇ Vs/ ⁇ ⁇ (d 1 / ⁇ 1 + d ⁇ / ⁇ ⁇ + d 2 / ⁇ 2 ) + d ⁇ ⁇
  • the electric field strength Ea has a maximum value (Ea, max) when the air gap approaches 0.
  • the maximum value may be expressed as follows.
  • Ea,max Vs/ ⁇ ⁇ (d 1 / ⁇ 1 + d ⁇ / ⁇ ⁇ + d 2 / ⁇ 2 ) ⁇
  • the maximum value may be expressed as follows.
  • the thickness d1 of the insulation coating may be set to 10mm in order to satisfy a minimum insulation breakdown electric field value of 0.8 kV/mm in the air.
  • the thickness d1 needs to be set to about 20mm, which is twice the thickness d, in consideration of a design margin. Accordingly, since the thickness of the power cable may be excessively increased, there are difficulties in implementing the power cable.
  • Ea,max Vs/ ⁇ ⁇ (d 1 / ⁇ 1 + d ⁇ / ⁇ ⁇ + d 2 / ⁇ 2 ) ⁇ ⁇ Vs/d ⁇ * ⁇ ⁇ / ⁇ ⁇ Vs/d ⁇
  • the thickness of the low-dielectric insulation coating is set to at least about 5mm even though twice the design margin is considered under the above-described condition, an arc discharge does not occur even at a voltage of 2kV.
  • the voltage division effect is added by the primary and secondary insulation coatings 19 and 21, the electric field value at the air gap more decreases, and therefore, the stability is further secured.
  • the low-dielectric insulation coating 20 may be formed of a light material containing foaming bubbles or a minute structure charged with inert gas, which has an excellent heat transfer characteristic or an excellent withstanding voltage characteristic.
  • the low-dielectric insulation coating 20 may be substituted with a dry air layer, and the second insulation coating 21 may be substituted with an insulation pipe such as a PVC pipe or the like.
  • a conventional power cable comprised of only the conductor 18 and the primary insulation coating 19 are inserted into the insulation pipe, and both ends of the PVC pipe are sealed, to thereby enable the implementation of a desired power cable.
  • a member may be required to properly fix the conventional power cable such that the surface of the conventional cable does not come in contact with the insulation pipe, but is positioned in the center. If the insulation pipe has a sufficiently large thickness as described above, it is also possible to arrange the conventional power cable to contact with the insulation pipe.
  • Fig. 6 is a plan view of pair of power cables enclosed with a high-dielectric exterior cover in accordance with another embodiment of the present invention.
  • Fig. 7 is a detailed diagram of the high-dielectric exterior cover shown in Fig. 7.
  • a pair of power cables 23 and 53 having different polarities is arranged at a predetermined distance and is placed on a cable support member 26. Further, the power cables 23 and 53 are enclosed with high-dielectric exterior covers 24 and 53, respectively.
  • the cable support member 26 may be a core unit of a power supply device for use in an on-line electric vehicle, a member for supporting the core unit, a member inserted between the core unit and the power cables.
  • the high-dielectric exterior covers 24 and 54 are connected with each other by a high-dielectric connection member 25 which may be integrally formed therewith.
  • the high-dielectric exterior covers 24 and 54 include an upper and a lower exterior covers 24a and 24b; and 54a and 54b.
  • the high-dielectric connection member 25 also includes an upper and lower high-dielectric connection member 25a and 25b.
  • the upper and lower connection member 25a and 25b connect the upper and lower exterior covers 24a and 54a; and 24b and 54b, respectively.
  • openings 27a and 27b are formed in the upper and the lower connection members 25a and 25b, respectively.
  • the respective power cables 23 and 53 are positioned on the lower exterior covers 24b and 54b, and the lower exterior covers 24b and 54b are respectively covered with the upper exterior covers 24a and 54a. After that, the openings 27a and 27b are fitted into a central protrusion 28 of the cable support member 26, thereby coupling the upper and the lower exterior covers together.
  • an electric field distribution is determined by the high-dielectric exterior covers 24 and 54 having a larger dielectric constant than other dielectric substances enclosing the power cables 23 and 53. Since the distance between the power cables 23 and 53 is typically set to several centimeters or more, the electric field strength inside the exterior covers 24 and 54 or on the surface of the exterior covers 24 and 54 may be set to be much less than an insulation breakdown reference value. The direction and magnitude of the electric field values are indicated by arrows illustrated in Fig. 6.
  • connection member 25 is spaced at regular intervals to connect the exterior covers 24 and 25 along a longitudinal direction of the power cables. More specifically, as shown in Fig.
  • connection members 25 are respectively arranged at the positions of the power supply core units 26.
  • the electric fields are uniformly distributed by the high-dielectric exterior coating 24, and the electric field strength at a specific portion does not approach the insulation breakdown electric field strength.
  • the electric field strength is no more than 5 V/mm. This is 160 times lower than 800 V/mm which is a design reference value.
  • the principle of the present invention may be generalized as follows. Assuming that the high-dielectric connection members are uniformly contacted with the respective cables and the distance between the cables is not too small (for example, 1 mm or less), the electric field strength does not reach the insulation breakdown electric field strength. As the dielectric constant of the high dielectric depends on the surrounding environment in a relatively clean and dry environment, the high dielectric may be sufficient to have a relative dielectric constant of about 5. In a wet environment, however, the relative dielectric constant needs to be set to 300 or more which is much larger than the relative dielectric constant, 80, of water. In some cases, insulating oil may serve as the high-dielectric connection member. In this case, the cables may be contained in a sealed container.
  • Fig. 8 is a front view of a power cable having a heat-resistant insulation coating in accordance with another embodiment of the present invention.
  • the cable support member 29 may be a core unit of a power supply device for use in an on-line electric vehicle, a member for supporting the core unit, a member inserted between the core unit and the power cable.
  • the power cable 50 includes a conductor 30, e.g., a Litz wire, a layer of a first insulation coating 31 and a layer of a second insulation coating 32 which are covered in sequence.
  • the second insulation coating 32 is formed of a heat-resistant material capable of enduring an arc discharge.
  • the heat-resistant material may includes, for example, ceramic, silicon, or a boron alloy. Such materials mostly have a solid property, and thus, may limit the flexibility of the power cable 50.
  • the second insulation coating 32 is formed in a ring shape. Then, an arc discharge 34 at a conductive protrusion 33 occurs only at an end portion of rings of the second insulation coating 32. Since the second insulation coating 32 is made of a heat-resistant material, the burning damage of the power cable 50 does not occur.
  • a nonferrous metal such as stainless steel or aluminum alloy may be used instead of the heat-resistant material forming the second insulation coating 32.
  • a nonferrous metal such as stainless steel or aluminum alloy
  • the heat-resistant material although an arc discharge occurs, the burning damage does not occur due to a favorable conductivity of the metal material. Instead, an undesired capacitance between the conductor 30 and the second insulating coating metal coating 32 may increase, and a large capacity current may flow. Therefore, it is preferred that a distance between the metal rings needs to be sufficiently larger than the width of the metal rings. For example, given that the width of the metal rings is set to 1mm, the distance between the metal rings needs to be set to 10 mm or more.
  • the height of the metal rings needs to be set in the range of 2 to 3 mm such that the cable support member 29 and the first insulation coating 31 are not directly contacted with each other. Since an increased width of the metal rings leads to an increased Eddy current loss, insulation lamination needs to be performed on the metal ring. Furthermore, since the line inductance increases and a loss occur, it is undesirable to use a magnetic material for the metal ring.
  • the power cable 50 in accordance with the embodiment of the present invention does not prevent an arc discharge itself. Therefore, it is not desirable to use the power cable in an environment where inflammable materials exist.
  • the second insulation coating 32 may be formed in a spiral shape.
  • the spiral shape is more convenient to install the second insulation coating 32 than a ring shape.
  • the ring-shaped insulation coating has difficulties in that the respective rings need to be arranged at a constant distance from one another.
  • the distance between the spirals may be constantly maintained. Therefore, the spiral-shaped second insulation coating may be simply installed by disposing it on the first insulation coating.
  • Fig. 9 is a diagram illustrating a power cable having a metal coating provided thereon in accordance with another embodiment of the present invention.
  • a power cable 60 is placed on a cable support member 36 with a predetermined air gap.
  • the power cable 60 includes a conductor 37, e.g., a Litz wire, a layer of an insulation coating 38, and a layer of a metal coating 39 which are covered in sequence.
  • the cable supporting member 36 has a power supply core unit 35 physically contained therein.
  • the cable supporting member 36 may be manufactured by molding a material forming the cable supporting member 36 over the power supply core unit 35.
  • the magnetic force lines 40 are determined according to currents of other conductors and the shape of the core unit as well as the current of the conductor 37.
  • the shape of the metal coating 37 is elliptical, but the metal coating 37 may be formed in an arbitrary shape. Furthermore, when the power cable 60 is positioned remote from the core unit 45 or other conductors, the metal coating 39 may be formed in a circular shape. The metal coating 39 may be connected to a metal coating of another power cable having an opposite polarity or a ground line through a conductive connection line 41. Then, a voltage applied between the two power cables is divided and applied only to the insulation coatings 38 of the two power cables, and therefore, a discharge in the air does not occur. In Fig. 9, the power cable 60 has the largest electric field strength value in a position in which when the insulation coating has the smallest thickness.
  • connection line 41 is not necessarily formed of a conductor having a favorable conductivity, and may include a member for supporting cables or resistor having a high conductive and a relatively large resistance. That is because, when the impedance of the capacitance is sufficiently smaller than that of the connection line 41, it is possible to substantially prevent a discharge in the air.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Insulated Conductors (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Communication Cables (AREA)
  • Insulating Bodies (AREA)

Abstract

L'invention concerne un câble évitant la décharge causée par un courant capacitif. Le câble comprend un conducteur, une première couche d'isolation recouvrant le conducteur, une couche d'isolation à faible coefficient diélectrique recouvrant la première couche d'isolation, et une seconde couche d'isolation recouvrant la couche d'isolation à faible coefficient diélectrique.
PCT/KR2010/006501 2009-09-25 2010-09-20 Câble de prévention de décharge WO2011037407A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090091335A KR101098551B1 (ko) 2009-09-25 2009-09-25 방전 방지 케이블
KR10-2009-0091335 2009-09-25

Publications (2)

Publication Number Publication Date
WO2011037407A2 true WO2011037407A2 (fr) 2011-03-31
WO2011037407A3 WO2011037407A3 (fr) 2011-07-14

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PCT/KR2010/006501 WO2011037407A2 (fr) 2009-09-25 2010-09-20 Câble de prévention de décharge

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KR (1) KR101098551B1 (fr)
WO (1) WO2011037407A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015211722A1 (de) * 2015-06-24 2016-12-29 Siemens Aktiengesellschaft Leitungsmodul für eine erdverlegbare Hochspannungsleitung, Hochspannungsleitung mit Leitungsmodulen sowie Verfahren zur Herstellung der Leitungsmodule

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10208562A (ja) * 1997-01-21 1998-08-07 Fujikura Ltd 電力ケーブル
JP2003178630A (ja) * 2001-12-13 2003-06-27 Hitachi Cable Ltd 自動車用低静電容量シールド電線
KR20040037766A (ko) * 2002-10-30 2004-05-07 기아자동차주식회사 전자기파 쉴드용 파형튜브
KR100607850B1 (ko) * 2003-11-07 2006-08-03 영창실리콘 주식회사 방열 다층절연전선

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015211722A1 (de) * 2015-06-24 2016-12-29 Siemens Aktiengesellschaft Leitungsmodul für eine erdverlegbare Hochspannungsleitung, Hochspannungsleitung mit Leitungsmodulen sowie Verfahren zur Herstellung der Leitungsmodule

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Publication number Publication date
KR101098551B1 (ko) 2011-12-26
KR20110033734A (ko) 2011-03-31
WO2011037407A3 (fr) 2011-07-14

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