EP0921531A2 - Flexible electrical line - Google Patents

Flexible electrical line Download PDF

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Publication number
EP0921531A2
EP0921531A2 EP98402930A EP98402930A EP0921531A2 EP 0921531 A2 EP0921531 A2 EP 0921531A2 EP 98402930 A EP98402930 A EP 98402930A EP 98402930 A EP98402930 A EP 98402930A EP 0921531 A2 EP0921531 A2 EP 0921531A2
Authority
EP
European Patent Office
Prior art keywords
wires
conductors
line according
protective conductor
screen
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.)
Granted
Application number
EP98402930A
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German (de)
French (fr)
Other versions
EP0921531A3 (en
EP0921531B1 (en
Inventor
Ferdinand Grögl
Thomas Hähner
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.)
Nexans SA
Original Assignee
Alcatel CIT SA
Alcatel SA
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 Alcatel CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Publication of EP0921531A2 publication Critical patent/EP0921531A2/en
Publication of EP0921531A3 publication Critical patent/EP0921531A3/en
Application granted granted Critical
Publication of EP0921531B1 publication Critical patent/EP0921531B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H01B7/041—Flexible cables, conductors, or cords, e.g. trailing cables attached to mobile objects, e.g. portable tools, elevators, mining equipment, hoisting cables

Definitions

  • the invention relates to a flexible electrical cable for towing at least three wires made of insulated conductors, at least one for all wires effective protective conductor and a common electrical shield surrounding all wires (Catalog K 37, July 1994, "Cables and Lines" from U.I. LAPP GmbH & Co. KG, Stuttgart, Page 57).
  • Such lines are used, for example, as connecting lines between one Electric motor and a frequency converter used.
  • the cables are constantly moved, especially in drag chains.
  • both shielded and unshielded cables are listed.
  • the shielded version is used when there are special demands on the electromagnetic Compatibility (EMC).
  • the shield Due to the asymmetrical structure of such shielded cables different between the wires and the protective conductor depending on the shielding Operating capacities and inductors, which in operation lead to equalizing currents to earth to lead.
  • the shield is insulated from the protective conductor. That has to Consequence that between the shield and the protective conductor also line coverings (capacities and inductors) exist. It can therefore be in the harmonic range (MHz range) especially in the case of relatively long lines, build a resonance circuit that is too uncontrolled Equalizing currents against earth. This can be an undesired response to the Residual current circuit breaker.
  • the invention has for its object to design the line described above so that disturbing equalizing currents can be largely avoided.
  • the line is therefore particularly as Trailing cable suitable for connecting a frequency converter to a motor.
  • 1 to 3 show cross sections of three different versions of the line according to the invention.
  • the line shown in cross section in FIG. 1 has three wires 1, 2 and 3 which are stranded together.
  • the wires 1, 2 and 3 are of a common electrical Surround screen 4, over which an existing plastic, such as polyurethane Coat 5 is applied.
  • the line has three wires. It however, there may also be more than three wires.
  • Each wire 1 or 2 or 3 consists of an easily bendable electrical conductor 6, the is constructed, for example, as a stranded conductor made of copper wires. Over the conductor 6 is one for example, consisting of cross-linked polyethylene insulation 7 attached by a Partial protective conductor 8 is surrounded. The partial protective conductor 8 is of a semiconducting layer 9 surround.
  • the structure of the wires 1, 2 and 3 is only in Fig. 1 for the sake of clarity Wire 1 with reference numerals.
  • the one in the gusset between wires 1, 2 and 3 attached filling elements 10 are made of plastic. It can also be semiconducting Be used material.
  • the wires 1, 2 and 3 lie against each other, so that their semiconducting layers 8 each other touch. They also touch the screen 4.
  • the semiconducting layers 8 can consist for example of a semiconducting fleece or a metallized fleece.
  • the three Partial protective conductor 8 are preferably made of copper. For example, you can use wires exist that are roped around the insulation 7 of the wires 1, 2 and 3.
  • the partial protective conductor 8 can also be designed as a braid made of copper wires.
  • the cross section of the Partial protective conductor 8 is dimensioned such that it is approximately one third of the cross section for one Lines required cross-section corresponds. Whose electrically effective cross section must be guaranteed by the three protective conductor 8.
  • All wires 1, 2 and 3 have the same operating capacity and with this construction of the line Inductance. There are also no partial capacities between wires 1, 2 and 3 with each other and between wires 1, 2 and 3 and the screen 4. Interfering Equalization currents do not occur with this line.
  • a control wire pair 11 which consists of two insulated electrical conductors 12 and 13 consists.
  • Such control wires are used for the transmission of signals for process control, for example for switching a motor connected by means of the line on and off.
  • the control wire pair 11 can, according to FIG. 2, have a common electrical screen 14 be surrounded, over which there is also a semiconducting layer 9.
  • the screen 14 can be a Braid of copper wires.
  • the screen 14 can also include plastic-clad metal foil.
  • control wire pair 11 it is also possible to have only one wrapping 15 made of insulating material to attach over the control wire pair 11. That is usually enough for an effective one Shielding, since the control wire pair 11 with the partial protective conductors 8 and the common Screen 4 is completely surrounded by screens.
  • the filling elements 16 and 17 of the Control wire pairs 11 are made of plastic.
  • the common screen 4 can additionally have a semiconducting layer 18 with the same Structure such as the layers 9, over which the jacket 5 is located.
  • the other Structure of the line corresponds to that of FIG. 1. Also in the embodiments of the line 2 and 3 compensating currents are avoided.

Abstract

The electrical lead cable has at least 3 insulated conductor wires (1, 2, 3), provided with a common protection conductor and enclosed by a common electrical screen (4). The common protection conductor is provided by a separate partial protection conductor (8) around the outside of each insulated conductor wire, provided with a semiconductor layer (9) on its outside.

Description

Die Erfindung bezieht sich auf eine flexible elektrische Leitung für den Schleppeinsatz mit mindestens drei aus isolierten Leitern bestehenden Adern, mindestens einem für alle Adern wirksamen Schutzleiter und einem gemeinsamen, alle Adern umgebenden elektrischen Schirm (Katalog K 37, Juli 1994, "Kabel und Leitungen" der U.I. LAPP GmbH & Co. KG, Stuttgart, Seite 57).The invention relates to a flexible electrical cable for towing at least three wires made of insulated conductors, at least one for all wires effective protective conductor and a common electrical shield surrounding all wires (Catalog K 37, July 1994, "Cables and Lines" from U.I. LAPP GmbH & Co. KG, Stuttgart, Page 57).

Derartige Leitungen werden beispielsweise als Verbindungsleitungen zwischen einem Elektromotor und einem Frequenzumrichter eingesetzt. Beim Betrieb entsprechender Anlagen werden die Leitungen speziell in Schleppketten dauernd bewegt. In dem erwähnten Katalog sind sowohl geschirmte als auch ungeschirmte Leitungen aufgeführt. Die geschirmte Version wird dann verwendet, wenn besondere Anforderungen an die Elektromagnetische Verträglichkeit (EMV) gestellt werden.Such lines are used, for example, as connecting lines between one Electric motor and a frequency converter used. When operating corresponding systems the cables are constantly moved, especially in drag chains. In the mentioned catalog both shielded and unshielded cables are listed. The shielded version is used when there are special demands on the electromagnetic Compatibility (EMC).

Bedingt durch den unsymmetrischen Aufbau treten bei solchen geschirmten Leitungen zwischen den Adern und dem Schutzleiter je nach Schirmnähe unterschiedliche Betriebskapazitäten und Induktivitäten auf, die im Betrieb zu Ausgleichsströmen gegen Erde führen. Darüber hinaus ist der Schirm zum Schutzleiter hin isoliert ausgeführt. Das hat zur Folge, daß zwischen dem Schirm und dem Schutzleiter ebenfalls Leitungsbeläge (Kapazitäten und Induktivitäten) bestehen. Es kann sich daher im Oberwellenbereich (MHz-Bereich) insbesondere bei relativ langen Leitungen ein Resonanzkreis aufbauen, der zu unkontrollierten Ausgleichsströmen gegen Erde führt. Das kann ein ungewolltes Ansprechen des Fehlerstromschutzschalters zur Folge haben.Due to the asymmetrical structure of such shielded cables different between the wires and the protective conductor depending on the shielding Operating capacities and inductors, which in operation lead to equalizing currents to earth to lead. In addition, the shield is insulated from the protective conductor. That has to Consequence that between the shield and the protective conductor also line coverings (capacities and inductors) exist. It can therefore be in the harmonic range (MHz range) especially in the case of relatively long lines, build a resonance circuit that is too uncontrolled Equalizing currents against earth. This can be an undesired response to the Residual current circuit breaker.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs geschilderte Leitung so zu gestalten, daß störende Ausgleichsströme weitgehendst vermieden werden können. The invention has for its object to design the line described above so that disturbing equalizing currents can be largely avoided.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst.

  • daß der Schutzleiter unter Beibehaltung seines elektrisch wirksamen Querschnitts so auf die drei Adern aufgeteilt ist, daß jede Ader rundum von einem separaten Teilschutzleiter umgeben ist und
  • daß über jedem Teilschutzleiter eine halbleitende Schicht angebracht ist.
This object is achieved according to the invention.
  • that the protective conductor while maintaining its electrically effective cross-section is divided over the three wires so that each wire is completely surrounded by a separate partial protective conductor and
  • that a semiconducting layer is applied over each partial protective conductor.

Mit einer solchen Leitung werden Ausgleichsströme vermieden, da für alle Adern gleiche Betriebskapazitäten und Induktivitäten vorliegen. Wegen der halbleitenden Schicht über jeder Ader bestehen insbesondere keine Teilkapazitäten zwischen den Teilschutzleitern selbst sowie zwischen dem Schirm und den Teilschutzleitern. Die Leitung ist daher besonders als Schleppleitung zur Verbindung eines Frequenzumrichters mit einem Motor geeignet.With such a line, equalizing currents are avoided since the same for all wires Operating capacities and inductors are available. Because of the semiconducting layer over everyone In particular, there are no partial capacities between the partial protective conductors themselves as well as between the shield and the partial protective conductors. The line is therefore particularly as Trailing cable suitable for connecting a frequency converter to a motor.

Ausführungsbeispiele des Erfindungsgegenstandes sind in den Zeichnungen dargestellt.Embodiments of the subject matter of the invention are shown in the drawings.

Die Fig. 1 bis 3 zeigen Querschnitte von drei unterschiedlichen Ausführungen der Leitung nach der Erfindung.1 to 3 show cross sections of three different versions of the line according to the invention.

Die in Fig. 1 im Querschnitt dargestellte Leitung weist drei Adern 1,2 und 3 auf, die miteinander verseilt sind. Die Adern 1, 2 und 3 sind von einem gemeinsamen elektrischen Schirm 4 umgeben, über dem ein aus Kunststoff, wie beispielsweise Polyurethan, bestehender Mantel 5 aufgebracht ist. Im dargestellten Ausführungsbeispiel hat die Leitung drei Adern. Es können aber auch mehr als drei Adern vorhanden sein.The line shown in cross section in FIG. 1 has three wires 1, 2 and 3 which are stranded together. The wires 1, 2 and 3 are of a common electrical Surround screen 4, over which an existing plastic, such as polyurethane Coat 5 is applied. In the illustrated embodiment, the line has three wires. It however, there may also be more than three wires.

Jede Ader 1 bzw. 2 oder 3 besteht aus einem gut biegbaren elektrischen Leiter 6, der beispielweise als Litzenleiter aus Kupferdrähten aufgebaut ist. Über dem Leiter 6 ist eine beispielweise aus vernetzten Polyethylen bestehende Isolierung 7 angebracht, die von einem Teilschutzleiter 8 umgeben ist. Der Teilschutzleiter 8 ist von einer halbleitenden Schicht 9 umgeben. Der Aufbau der Adern 1, 2 und 3 ist in Fig. 1 der Übersichtlichkeit halber nur für die Ader 1 mit Bezugszeichen versehen. Die in den Zwickeln zwischen den Adern 1, 2 und 3 angebrachten Füllelemente 10 bestehen aus Kunststoff. Dabei kann ebenfalls halbleitendes Material eingesetzt sein.Each wire 1 or 2 or 3 consists of an easily bendable electrical conductor 6, the is constructed, for example, as a stranded conductor made of copper wires. Over the conductor 6 is one for example, consisting of cross-linked polyethylene insulation 7 attached by a Partial protective conductor 8 is surrounded. The partial protective conductor 8 is of a semiconducting layer 9 surround. The structure of the wires 1, 2 and 3 is only in Fig. 1 for the sake of clarity Wire 1 with reference numerals. The one in the gusset between wires 1, 2 and 3 attached filling elements 10 are made of plastic. It can also be semiconducting Be used material.

Die Adern 1, 2 und 3 liegen aneinander an, so daß ihre halbleitenden Schichten 8 einander berühren. Sie berühren außerdem den Schirm 4. Die halbleitenden Schichten 8 können beispielweise aus einem halbleitenden Vlies oder einem metallisierten Vließ bestehen. Die drei Teilschutzleiter 8 bestehen vorzugsweise aus Kupfer. Sie können beispielweise aus Drähten bestehen, die um die Isolierung 7 der Adern 1, 2 und 3 herumgeseilt sind. Die Teilschutzleiter 8 können aber auch als Geflecht aus Kupferdrähten ausgeführt sein. Der Querschnitt der Teilschutzleiter 8 ist so bemessen, daß er etwa einem Drittel des Querschnitts eines für solche Leitungen erforderlichen Querschnitts entpricht. Dessen elektrisch wirksamer Querschnitt muß durch die drei Teilschutzleiter 8 gewährleistet sein.The wires 1, 2 and 3 lie against each other, so that their semiconducting layers 8 each other touch. They also touch the screen 4. The semiconducting layers 8 can consist for example of a semiconducting fleece or a metallized fleece. The three Partial protective conductor 8 are preferably made of copper. For example, you can use wires exist that are roped around the insulation 7 of the wires 1, 2 and 3. The partial protective conductor 8 can also be designed as a braid made of copper wires. The cross section of the Partial protective conductor 8 is dimensioned such that it is approximately one third of the cross section for one Lines required cross-section corresponds. Whose electrically effective cross section must be guaranteed by the three protective conductor 8.

Alle Adern 1, 2 und 3 haben bei diesem Aufbau der Leitung gleiche Betriebskapazität und Induktivität. Es bestehen außerdem keine Teilkapazitäten zwischen den Adern 1, 2 und 3 untereinander und zwischen den Adern 1, 2 und 3 und dem Schirm 4. Störende Ausgleichsströme treten bei dieser Leitung nicht auf.All wires 1, 2 and 3 have the same operating capacity and with this construction of the line Inductance. There are also no partial capacities between wires 1, 2 and 3 with each other and between wires 1, 2 and 3 and the screen 4. Interfering Equalization currents do not occur with this line.

Bei der Ausführungsform der Leitung nach den Fig. 2 und 3 ist neben den Adern 1, 2 und 3 ein Steueraderpaar 11 vorgesehen, das aus zwei isolierten elektrischen Leitern 12 und 13 besteht. Derartige Steueradern dienen der Übertragung von Signalen zur Prozeßsteuerung, beispielsweise zum Ein- und Ausschalten eines mittels der Leitung angeschlossenen Motors. Das Steueraderpaar 11 kann gemäß Fig. 2 von einem gemeinsamen elektrischen Schirm 14 umgeben sein, über dem ebenfalls eine halbleitende Schicht 9 liegt. Der Schirm 14 kann ein Geflecht aus Kupferdrähten sein. Zusätzlich kann zum Schirm 14 auch eine kunststoffkaschierte Metallfolie gehören.In the embodiment of the line according to FIGS. 2 and 3, in addition to the wires 1, 2 and 3 a control wire pair 11 is provided, which consists of two insulated electrical conductors 12 and 13 consists. Such control wires are used for the transmission of signals for process control, for example for switching a motor connected by means of the line on and off. The control wire pair 11 can, according to FIG. 2, have a common electrical screen 14 be surrounded, over which there is also a semiconducting layer 9. The screen 14 can be a Braid of copper wires. In addition to the screen 14 can also include plastic-clad metal foil.

Es ist gemäß Fig. 3 auch möglich, nur eine aus Isoliermaterial bestehende Umwicklung 15 über dem Steueraderpaar 11 anzubringen. Das reicht im Normalfall für eine effektive Schirmung aus, da das Steueraderpaar 11 mit den Teilschutzleitern 8 und dem gemeinsamen Schirm 4 vollkommen von Schirmen umgeben ist. Die Füllelemente 16 und 17 des Steueraderpaars 11 bestehen aus Kunststoff.According to FIG. 3, it is also possible to have only one wrapping 15 made of insulating material to attach over the control wire pair 11. That is usually enough for an effective one Shielding, since the control wire pair 11 with the partial protective conductors 8 and the common Screen 4 is completely surrounded by screens. The filling elements 16 and 17 of the Control wire pairs 11 are made of plastic.

Der gemeinsame Schirm 4 kann zusätzlich von einer halbleitenden Schicht 18 mit gleichem Aufbau wie die Schichten 9 umgeben sein, über welcher der Mantel 5 liegt. Der sonstige Aufbau der Leitung entspricht dem nach Fig. 1. Auch bei den Ausführungsformen der Leitung nach den Fig. 2 und 3 sind Ausgleichsströme vermieden.The common screen 4 can additionally have a semiconducting layer 18 with the same Structure such as the layers 9, over which the jacket 5 is located. The other Structure of the line corresponds to that of FIG. 1. Also in the embodiments of the line 2 and 3 compensating currents are avoided.

Claims (10)

Flexible elektrische Leitung für den Schleppeinsatz mit mindestens drei aus isolierten Leitern bestehenden Adern, mindestens einem für alle Adern wirksamen Schutzleiter und einem gemeinsamen, alle Adern umgebenden elektrischen Schirm, dadurch gekennzeichnet, daß der Schutzleiter unter Beibehaltung seines elektrisch wirksamen Querschnitts so auf die drei Adern (1,2,3) aufgeteilt ist, daß jede Ader (1,2,3) rundum von einem separaten Teilschutzleiter (8) umgeben ist und daß über jedem Teilschutzleiter (8) eine halbleitende Schicht (9) angebracht ist. Flexible electrical cable for towing use with at least three conductors consisting of insulated conductors, at least one protective conductor effective for all conductors and a common electrical shield surrounding all conductors, characterized in that that the protective conductor while maintaining its electrically effective cross-section is divided over the three wires (1, 2, 3) so that each wire (1, 2, 3) is completely surrounded by a separate partial protective conductor (8) and that a semiconducting layer (9) is attached over each partial protective conductor (8). Leitung nach Anspruch 1, dadurch gekennzeichnet, daß die Teilschutzleiter (8) aus Drähten bestehen, die um die Isolierung (7) der Adern (1,2,3) herumgeseilt sind.Cable according to claim 1, characterized in that the partial protective conductors (8) consist of wires which are roped around the insulation (7) of the wires (1, 2, 3). Leitung nach Anspruch 1, dadurch gekennzeichnet, daß die Teilschutzleiter (8) als Geflecht ausgebildet sind.Cable according to claim 1, characterized in that the partial protective conductors (8) are constructed as a braid. Leitung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß neben den Adern (1,2,3) ein aus zwei isolierten Leitern (12,13) bestehendes Steueraderpaar (11) vorhanden ist.Cable according to one of claims 1 to 3, characterized in that in addition to the wires (1, 2, 3) there is a control wire pair (11) consisting of two insulated conductors (12, 13). Leitung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Steueraderpaar (11) von einem gemeinsamen elektrischen Schirm (14) umgeben ist.Line according to one of claims 1 to 4, characterized in that the pair of control wires (11) is surrounded by a common electrical screen (14). Leitung nach Ansoruch 5, dadurch gekennzeichnet, daß der Schirm (14) ein Geflecht ist.Line according to Ansoruch 5, characterized in that the screen (14) is a braid. Leitung nach Anspruch 5, dadurch gekennzeichnet, daß der Schirm (14) aus einem Geflecht und einer kunststoffkaschierten Metallfolie besteht.Line according to claim 5, characterized in that the screen (14) consists of a braid and a plastic-clad metal foil. Leitung nach einem der Ansprüch 5 bis 7, dadurch gekennzeichnet, daß das geschirmte Steueraderpaar (11) von einer halbleitenden Schicht (9) umgeben ist. Line according to one of Claims 5 to 7, characterized in that the shielded pair of control wires (11) is surrounded by a semiconducting layer (9). Leitung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die halbleitende Schicht (9) ein halbleitendes Vlies ist.Line according to one of Claims 1 to 8, characterized in that the semiconducting layer (9) is a semiconducting fleece. Leitung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die halbleitende Schicht (9) ein metallisiertes Vließ ist.Line according to one of Claims 1 to 8, characterized in that the semiconducting layer (9) is a metallized fleece.
EP98402930A 1997-12-03 1998-11-23 Flexible electrical line Expired - Lifetime EP0921531B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19753526A DE19753526A1 (en) 1997-12-03 1997-12-03 Flexible electrical wire
DE19753526 1997-12-03

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EP0921531A2 true EP0921531A2 (en) 1999-06-09
EP0921531A3 EP0921531A3 (en) 2000-05-31
EP0921531B1 EP0921531B1 (en) 2004-03-31

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EP98402930A Expired - Lifetime EP0921531B1 (en) 1997-12-03 1998-11-23 Flexible electrical line

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103915199A (en) * 2013-08-26 2014-07-09 安徽航天电缆集团有限公司 Major loop power cable for frequency converter

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DE19839900C2 (en) * 1998-09-02 2002-06-20 Draka Telekom Gmbh & Co Kg Cables for telecommunications and security systems
DE10057289A1 (en) * 2000-11-17 2002-07-11 Kromberg & Schubert Data transmission cable comprises at least two data conductors twisted into a pair, two parallel voltage-carrying conductors, and two dielectric elements in specified zones within the cable cross section
US8426734B2 (en) 2010-06-28 2013-04-23 Ametek, Inc. Low noise ECG cable and electrical assembly

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DE902988C (en) * 1941-06-29 1954-02-01 Siemens Ag Movable electrical multi-conductor cable, especially for excavators
FR2360965A1 (en) * 1976-08-05 1978-03-03 Cables De Lyon Geoffroy Delore Three=phase submarine electrical cable - uses thin steel strip protective cover to guard against damage by fishing boats
DE8906828U1 (en) * 1989-06-03 1990-07-05 Felten & Guilleaume Energietechnik Ag, 5000 Koeln, De

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DE899960C (en) * 1942-03-07 1953-12-17 Siemens Ag Movable electrical connection cable for large portable devices
DE3428643A1 (en) * 1983-11-12 1986-02-27 kabelmetal electro GmbH, 3000 Hannover Multi-wire flexible electrical cable having control lines
DE29613870U1 (en) * 1996-08-10 1996-09-26 Alcatel Kabel Ag Flexible electrical power line

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902988C (en) * 1941-06-29 1954-02-01 Siemens Ag Movable electrical multi-conductor cable, especially for excavators
FR2360965A1 (en) * 1976-08-05 1978-03-03 Cables De Lyon Geoffroy Delore Three=phase submarine electrical cable - uses thin steel strip protective cover to guard against damage by fishing boats
DE8906828U1 (en) * 1989-06-03 1990-07-05 Felten & Guilleaume Energietechnik Ag, 5000 Koeln, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103915199A (en) * 2013-08-26 2014-07-09 安徽航天电缆集团有限公司 Major loop power cable for frequency converter

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EP0921531A3 (en) 2000-05-31
EP0921531B1 (en) 2004-03-31
DE19753526A1 (en) 1999-06-10
DE59811092D1 (en) 2004-05-06

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