EP1490881A1 - Three-conductor cable - Google Patents

Three-conductor cable

Info

Publication number
EP1490881A1
EP1490881A1 EP03745241A EP03745241A EP1490881A1 EP 1490881 A1 EP1490881 A1 EP 1490881A1 EP 03745241 A EP03745241 A EP 03745241A EP 03745241 A EP03745241 A EP 03745241A EP 1490881 A1 EP1490881 A1 EP 1490881A1
Authority
EP
European Patent Office
Prior art keywords
conductor
neutral
return
wire cable
cable 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.)
Granted
Application number
EP03745241A
Other languages
German (de)
French (fr)
Other versions
EP1490881B1 (en
Inventor
Christoph Studer
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.)
Studer Schweiz AG
Original Assignee
Studer Draht und Kabelwerk AG
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Filing date
Publication date
Application filed by Studer Draht und Kabelwerk AG filed Critical Studer Draht und Kabelwerk AG
Publication of EP1490881A1 publication Critical patent/EP1490881A1/en
Application granted granted Critical
Publication of EP1490881B1 publication Critical patent/EP1490881B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/003—Power cables including electrical control or communication wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/04—Concentric cables

Definitions

  • the invention relates to a three-wire cable for energy transmission with a frequency of at least 50 Hz, preferably at least 100 Hz, for example 400 Hz.
  • So-called high-frequency energy transmission cables are used in the range of 400 Hz. They are required, for example, in the case of airplanes and the like in order to connect them to a fixed power network or a mobile unit at idle times. Due to the on-board electronics of the aircraft, which are sensitive to current fluctuations, the cable should not generate any disadvantageous asymmetrical voltage drops.
  • high-frequency energy transmission cables can also be used to supply motors for spindle drives (asynchronous / synchronous motors) or brushless DC motors.
  • the geometry of this well-known four-wire cable also creates asymmetrical electrical fields that can spread to the surrounding area.
  • the geometry of four stranded single-core cables also results in a mechanically ambiguously defined position of the arrangement, which usually has to be solved with a center element.
  • phase conductors are run twice and stranded around the centrally arranged neutral and / or return conductor. This creates a symmetrical arrangement with the neutral and / or return conductor in the center and six phase conductors stranded symmetrically around this. In this arrangement, two opposite phase conductors are connected to each other. In this design, the return conductor has half the cross-section of the phase conductor. This is a disadvantage with asymmetric loads, as is often the case with wide-body aircraft. The design has a relatively small inductance in the operating state, but it is complex and generally less flexible.
  • the three-wire cable according to the invention is intended, for example, for energy transmission in the higher frequency range from 400 Hz and has a symmetrical structure consisting of three electrical cables stranded together.
  • Each of the three electrical cables is essentially characterized in that it consists of a phase conductor, an insulation and a concentrically guided neutral and / or return conductor. Embedded in the concentrically guided neutral and / or return conductors or phase conductors are dummy and control conductors, an outer protective jacket also being applied over these and the neutral and / or return conductors.
  • the three-wire cable therefore contains one concentric, outer neutral and / or return conductor for each phase conductor, which, however, practically does not have to be used in completely symmetrical operation. Due to the geometric structure, there is only a small inductance, which has a positive effect on the voltage drop.
  • FIG. 2 shows a cross section through a three-wire cable according to the invention with three electrical cables stranded together according to FIG. 1.
  • the following information relating to the diameters of the various layers is exemplary and relates to an electrical cable which has an inner conductor cross section of approximately 50 mm 2 and is intended for energy transmission at a frequency of 400 Hz. It goes without saying that with a larger conductor cross-section or other frequency ranges, the different cross-sections can increase or decrease accordingly.
  • the protective sheath 3 surrounding the inner conductor 2 is approximately 0.2 to 1.4 mm thick and consists, for example, of a plastic tape, for example of polyester, which wraps the inner conductor 2 with an overlap of, for example, 20 to 30% of the bandwidth, and an extruded one Plastic layer.
  • the neutral and / or return conductor, the control wires 6 and the dummy wires 5 are arranged symmetrically stranded around the insulation 3.
  • the eight individual conductors 4 forming the return conductor preferably consist of Cu strands each having a cross section of approximately 2.5 mm 2 .
  • the nonwoven tape 7 is taped with an overlap of, for example, 20 to 30% of the bandwidth, this preferably having a wall thickness of about 0.05 to 0.2 mm.
  • the jacket 8 enclosing the fleece band 7 is made of known material and has a wall thickness of, for example, 1.5 to 5 mm.
  • the three-conductor cable shown in FIG. 2 and designated as a whole by 10 has three electrical cables 1 of the type described above which are distributed with one another.
  • the three electrical cables 1 stranded together can at most additionally be held together by a sheath enveloping them, for example in the form of a bandage or hose, which secures the electrical cables 1 against axial displacement.
  • the three-wire cable according to the invention has the advantages over the high-frequency cables described at the outset that, with the same performance, it has an absolutely symmetrical voltage drop on all three wires, which is smaller than that of the conventional cables. At the same time, a smaller mechanical bending moment is achieved by the construction according to the invention and, thanks to the simple construction, the connection design in the connecting plug is easy to implement. Furthermore, no additional center dummy wire for the defined stranding is necessary, so that the cable becomes lighter and more flexible.
  • phase conductor Before the phase conductor is touched by a metallic object the neutral conductor carrying the earth potential must be injured. This means that in the event of an injury, the phase with the earth potential is briefly closed before it can be touched under voltage.
  • the three-wire cable Compared to the known four-wire cable, the three-wire cable has other advantages, such as clear separation of control wires and phase wires, improved EMC behavior and a more stable distribution. Compared to the known cables with a symmetrical cable arrangement, the three-wire cable according to the invention additionally shows an improved heat radiation.
  • the three-wire cable according to the invention can be used in the frequency range from 50 Hz.
  • the symmetrical structure with the relatively large cross-section of the return conductor offers optimal conditions for connecting asymmetrical loads.
  • the symmetrical structure also offers distinctive advantages for flexible connections between UPS devices and data processing systems, radar stations, as well as transmitter systems, inverter - motor connections with higher EMC requirements, etc.
  • control wires not in the neutral and / or return conductor but in the respective phase conductor, in the same way as is the case with already known high-frequency cables.
  • the symmetrically distributed individual conductors 4 can be arranged in a meandering manner around the phase conductor instead of being stranded be, and the protective cover 3 can only consist of an extruded plastic layer.

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  • Communication Cables (AREA)
  • Insulated Conductors (AREA)
  • Cable Accessories (AREA)
  • Processing Of Terminals (AREA)

Abstract

The invention relates to a three-conductor cable (10) consisting of three stranded electric cables (1), each comprising a core that has a current conductor (2) and a neutral and/or return conductor. Each individual cable (1) is essentially characterised in that the neutral and/or return conductor is configured from a number of individual conductors (4), distributed concentrically around the current conductor (2), that an insulating sheath (3) is provided between the current conductor (2) and the distributed individual conductors (4) of the neutral and/or return conductor and that a protective jacket covers the neutral and/or return conductor.

Description

Dreileiterkabel Three-conductor cable
Technisches GebietTechnical field
Die Erfindung betrifft ein Dreileiterkabel zur Energieübertragung mit einer Frequenz von mindestens 50 Hz, vorzugsweise mindestens 100 Hz, beispielsweise 400 Hz.The invention relates to a three-wire cable for energy transmission with a frequency of at least 50 Hz, preferably at least 100 Hz, for example 400 Hz.
Im Bereich von 400 Hz werden sogenannte Hochfrequenz- Energieübertragungskabel eingesetzt. Sie werden zum Beispiel bei Flugzeugen und dergleichen benötigt, um diese zu Standzeiten an ein festes Stromnetz oder ein mobiles Aggregat an- zuschliessen. Das Kabel sollte dabei aufgrund der auf Stromschwankungen empfindlich reagierenden Bordelektronik der Flugzeuge keine nachteiligen asymmetrischen Spannungs-Abfälle erzeugen.So-called high-frequency energy transmission cables are used in the range of 400 Hz. They are required, for example, in the case of airplanes and the like in order to connect them to a fixed power network or a mobile unit at idle times. Due to the on-board electronics of the aircraft, which are sensitive to current fluctuations, the cable should not generate any disadvantageous asymmetrical voltage drops.
Ein anderes Anwendungsgebiet ist die Motorentechnik. So können Hochfrequenz-Energieübertragungskabel zum Beispiel auch zur Speisung von Motoren für Spindelantriebe (Asynchron/Synchron-Motoren) oder von bürstenlosen DC-Motoren eingesetzt werden.Another area of application is engine technology. For example, high-frequency energy transmission cables can also be used to supply motors for spindle drives (asynchronous / synchronous motors) or brushless DC motors.
Stand der TechnikState of the art
Bekannte Hochfrequenzkabel für Frequenzen ab 400 Hz bestehen aus vier miteinander verseilten bzw. verdrillten Einzelleitern, bestehend aus drei Phasenleitern und einem Neutral- und/oder Rückleiter. Bei dieser Konstruktion liegen in Nachbarschaft zum Neutral- und/oder Rückleiter jeweils zwei Phasenleiter. Zwischen diesen beiden wiederum liegt der dritte Phasenleiter. Diese Asymmetrie hat einen nachteiligen induktiven Spannungsabfall zur Folge, der insbesondere bei Kabeln, die im höheren Frequenzbereich betrieben werden, eine enorm wichtige Stellung einnimmt.Known high-frequency cables for frequencies from 400 Hz consist of four stranded or twisted individual conductors, consisting of three phase conductors and a neutral and / or return conductor. In this construction there are two in each case in the vicinity of the neutral and / or return conductor Phase conductor. The third phase conductor lies between these two. This asymmetry results in a disadvantageous inductive voltage drop, which has an enormously important position, particularly in the case of cables which are operated in the higher frequency range.
Durch die Geometrie dieses bekannten Vierleiterkabels entstehen zudem asymmetrische elektrische Felder, die sich störend auf die nähere Umgebung ausbreiten können. Durch die Geometrie von vier verseilten Einleiterkabeln ergibt sich ferner eine mechanisch nicht eindeutig definierte Position der Anordnung, die in der Regel mit einem Zentrumselement gelöst werden muss.The geometry of this well-known four-wire cable also creates asymmetrical electrical fields that can spread to the surrounding area. The geometry of four stranded single-core cables also results in a mechanically ambiguously defined position of the arrangement, which usually has to be solved with a center element.
Es gibt aber auch Hochfrequenz-Energieübertragungskabel mit einer symmetrischen Kabelanordnung. Diese Kabel weisen die geometrisch bedingten Nachteile der vorgenannten Vierleiterkabel nicht auf. Bei Ihnen werden die Phasenleiter doppelt geführt und um den zentral angeordneten Neutral- und/oder Rückleiter herum verseilt. Dadurch entsteht eine symmetrische Anordnung mit dem Neutral- und/oder Rückleiter im Zentrum und sechs symmetrisch um diesen verseilten Phasenleitern. In dieser Anordnung werden jeweils zwei gegenüberliegende Phasenleiter miteinander verbunden. Der Rückleiter verfügt in dieser Konstruktion über den halben Querschnitt der Phasenleiter. Dies ist ein Nachteil bei asymmetrischer Last, wie sie bei Grossraumflugzeugen oft vorkommt. Die Konstruktion weist im Betriebszustand zwar eine verhältnismässig kleine Induktivität auf, sie ist aber aufwendig und in der Regel weniger flexibel. Sie erfordert zudem die Isolation von zwei parallelen Dreiphasen-Systemen, was einen Mehrverbrauch an hochwertigem Isolationsmaterial bedeutet. Im weiteren muss bei diesem Kabel vor dem Stecker oder darin eine Zusammenführung der jeweils zwei zueinander gehörenden Phasenleitern erfolgen. Dieser zweite Typ von Hochfrequenz-Energieübertragungskabel weist also den Nachteil einer komplizierten und ver- hältnismässig teuren Herstellung auf. Zudem haben diese Kabel eine kleinere Oberfläche, über die die intern anfallende Verlustwärme an die Umgebung abgegeben werden kann.However, there are also high-frequency power transmission cables with a symmetrical cable arrangement. These cables do not have the geometric disadvantages of the aforementioned four-wire cables. With you, the phase conductors are run twice and stranded around the centrally arranged neutral and / or return conductor. This creates a symmetrical arrangement with the neutral and / or return conductor in the center and six phase conductors stranded symmetrically around this. In this arrangement, two opposite phase conductors are connected to each other. In this design, the return conductor has half the cross-section of the phase conductor. This is a disadvantage with asymmetric loads, as is often the case with wide-body aircraft. The design has a relatively small inductance in the operating state, but it is complex and generally less flexible. It also requires the isolation of two parallel three-phase systems, which means an additional consumption of high-quality insulation material. Furthermore, with this cable, the two phase conductors belonging to each other must be brought together in front of or in the connector. This second type of high-frequency power transmission cable therefore has the disadvantage of being complicated and relatively expensive to manufacture. In addition, these cables have a smaller surface, through which the internal heat loss can be released to the environment.
Abriss der ErfindungOutline of the invention
Der Erfindung liegt nun die Aufgabe zu Grunde, ein Elek- trokabel zur Energieübertragung mit einer Frequenz von mindestens 50 Hz, sowie insbesondere ein Hochfrequenz-Energieübertragungskabel zu schaffen, das die vorgenannten Nachteile nicht aufweist, wobei vor allem letzteres die Vorteile einer symmetrischen Anordnung mit der Flexibilität und der Einfachheit der verdrillten Einleiterkonstruktion verbinden soll und bei gleicher Leistungsfähigkeit und Betriebssicherheit einen ähnlichen Durchmesser hat wie die bekannten Vierleiter- Hochfrequenzkabel .The invention is based on the object of creating an electrical cable for energy transmission with a frequency of at least 50 Hz, and in particular a high-frequency energy transmission cable which does not have the aforementioned disadvantages, the latter in particular having the advantages of a symmetrical arrangement with the Flexibility and the simplicity of the twisted single-conductor construction should combine and with the same performance and operational reliability has a similar diameter as the known four-wire high-frequency cable.
Diese Aufgabe wird erfindungsgemäss durch ein Dreileiterkabel mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved according to the invention by a three-wire cable with the features of patent claim 1.
Das erfindungsgemässe Dreileiterkabel ist beispielsweise für eine Energieübertragung im höheren Frequenzbereich ab 400 Hz bestimmt und weist einen symmetrischen Aufbau aus drei miteinander verseilten Elektrokabeln auf. Jedes der drei Elektrokabel ist im Wesentlichen dadurch gekennzeichnet, dass es aus einem Phasenleiter, einer Isolation und einem konzentrisch geführten Neutral- und/oder Rückleiter besteht. Eingebettet in den konzentrisch geführten Neutral- und/oder Rückleiter oder Phasenleiter sind Blind- und Steueradern, wobei über diesen und dem Neutral- und/oder Rückleiter noch zudem ein äusserer Schutzmantel aufgebracht ist. Das Dreileiterkabel enthält also pro Phasenleiter jeweils einen konzentrischen, äusseren Neutral- und/oder Rückleiter, der jedoch im völlig symmetrischen Betrieb praktisch nicht benützt werden muss. Durch den geometrischen Aufbau ergibt sich nur eine kleine Induktivität, was sich positiv auf den Spannungsabfall auswirkt.The three-wire cable according to the invention is intended, for example, for energy transmission in the higher frequency range from 400 Hz and has a symmetrical structure consisting of three electrical cables stranded together. Each of the three electrical cables is essentially characterized in that it consists of a phase conductor, an insulation and a concentrically guided neutral and / or return conductor. Embedded in the concentrically guided neutral and / or return conductors or phase conductors are dummy and control conductors, an outer protective jacket also being applied over these and the neutral and / or return conductors. The three-wire cable therefore contains one concentric, outer neutral and / or return conductor for each phase conductor, which, however, practically does not have to be used in completely symmetrical operation. Due to the geometric structure, there is only a small inductance, which has a positive effect on the voltage drop.
Vorteilhafte Ausführungsformen der Erfindung gehen aus den abhängigen Ansprüchen hervor.Advantageous embodiments of the invention emerge from the dependent claims.
Kurze Beschreibung der ZeichnungBrief description of the drawing
Nachfolgend wird anhand der Zeichnung ein Ausführungsbeispiel der Erfindung beschrieben. In der Zeichnung zeigtAn exemplary embodiment of the invention is described below with reference to the drawing. In the drawing shows
die Figur 1 eine perspektivische Ansicht eines Elektrokabels und1 shows a perspective view of an electrical cable and
die Figur 2 einen Querschnitt durch ein erfindungsge- mässes Dreileiterkabel mit drei miteinander verseilten Elektrokabeln gemäss Figur 1.FIG. 2 shows a cross section through a three-wire cable according to the invention with three electrical cables stranded together according to FIG. 1.
Beschreibung eines bevorzugten AusführungsbeispielsDescription of a preferred embodiment
Das in der Figur 1 separat und in der Figur 2 mit gleichen Kabeln verseilt dargestellte und als ganzes mit 1 bezeichnete, Elektrokabel besitzt eine Aderleitung, nämlich einen Innenleiter 2 mit mehreren miteinander verseilten Litzen.The electrical cable shown separately in FIG. 1 and stranded with the same cables in FIG. 2 and designated as a whole by 1 has a core line, namely an inner conductor 2 with a plurality of strands stranded together.
Der Innenleiter 2 ist von einer vorzugsweise aus Kunststoff gebildeten, nachfolgend auch als Isolation bezeichneten, Schutzhülle 3 umhüllt. Eingebettet in den durch beispielsweise acht Einzelleiter 4 gebildeten, konzentrisch geführten Neutral- und/oder Ruckleiter sind Blindadern 5 sowie Steueradern 6, welche ihrerseits zu Kontroll-, Uberwachungs-, Mess- und Steuerzwecken mitgefuhrt werden.The inner conductor 2 is encased by a protective sheath 3, which is preferably made of plastic and is also referred to below as insulation. Embedded in the concentrically guided neutral and / or return conductors formed by, for example, eight individual conductors 4 are dummy conductors 5 and control conductors 6, which in turn are carried for control, monitoring, measurement and control purposes.
Über den Einzelleitern 4 des Neutral- und/oder Ruckleiters, den Blindadern 5 und den Steueradern 6 ist ein Vliessband 7 und darüber ein vorzugsweise aus Kunststoff bestehender Schutzmantel 8 aufgebracht.Over the individual conductors 4 of the neutral and / or return conductor, the dummy cores 5 and the control cores 6, a nonwoven tape 7 and, above, a protective sheath 8, preferably made of plastic, are applied.
Die nun folgenden sich auf die Durchmesser der verschiedenen Schichten beziehenden Angaben sind beispielhaft und beziehen sich auf ein Elektrokabel, das einen Innen- leiterquerschnitt von ca. 50 mm2 aufweist und für eine Energie-Übertragung mit einer Frequenz von 400 Hz vorgesehen ist. Es ist selbstverständlich, dass bei grosserem Stromleiterquerschnitt oder anderen Frequenzbereichen die verschiedenen Querschnitte entsprechend zu- oder abnehmen können.The following information relating to the diameters of the various layers is exemplary and relates to an electrical cable which has an inner conductor cross section of approximately 50 mm 2 and is intended for energy transmission at a frequency of 400 Hz. It goes without saying that with a larger conductor cross-section or other frequency ranges, the different cross-sections can increase or decrease accordingly.
Die den Innenleiter 2 umschliessende Schutzhülle 3 ist etwa 0,2 bis 1,4 mm dick und besteht zum Beispiel aus einem Kunststoffband, beispielsweise aus Polyester, das den Innenleiter 2 mit einer Überlappung von beispielsweise 20 bis 30 % der Bandbreite umwickelt, sowie einer extrudierten Kunststoff-Schicht .The protective sheath 3 surrounding the inner conductor 2 is approximately 0.2 to 1.4 mm thick and consists, for example, of a plastic tape, for example of polyester, which wraps the inner conductor 2 with an overlap of, for example, 20 to 30% of the bandwidth, and an extruded one Plastic layer.
Um die Isolation 3 herum sind der Neutral- und/oder Ruckleiter, die Steueradern 6 und die Blindadern 5 symmetrisch verseilt angeordnet. Die acht den Ruckleiter bildenden Einzelleiter 4 bestehen vorzugsweise aus Cu-Litzen mit einem Querschnitt von je etwa 2,5 mm2.The neutral and / or return conductor, the control wires 6 and the dummy wires 5 are arranged symmetrically stranded around the insulation 3. The eight individual conductors 4 forming the return conductor preferably consist of Cu strands each having a cross section of approximately 2.5 mm 2 .
Über der Verseilung bestehend aus den Einzelleitern 4 des Neutral- und/oder Ruckleiters, den Steueradern 6 und den Blindadern 5 ist das Vliessband 7 mit einer Überlappung von beispielsweise 20 bis 30 % der Bandbreite aufbandiert, wobei dieses vorzugsweise eine Wandstärke von etwa 0,05 bis 0,2 mm besitzt .Over the stranding consisting of the individual conductors 4 of the neutral and / or return conductor, the control wires 6 and Blind veins 5, the nonwoven tape 7 is taped with an overlap of, for example, 20 to 30% of the bandwidth, this preferably having a wall thickness of about 0.05 to 0.2 mm.
Der das Vliessband 7 umschliessende Mantel 8 besteht aus bekanntem Material und besitzt eine Wandstärke von beispielsweise 1,5 bis 5 mm.The jacket 8 enclosing the fleece band 7 is made of known material and has a wall thickness of, for example, 1.5 to 5 mm.
Das in der Figur 2 dargestellte und als ganzes mit 10 bezeichnete Dreileiterkabel weist drei miteinander verteilte Elektrokabel 1 der vorstehend beschriebenen Art auf. Die drei miteinander verseilten Elektrokabel 1 können in einer besonderen Ausführungsform der Erfindung allenfalls noch zusätzlich durch einen sie umhüllenden, beispielsweise als Bandage oder Schlauch ausgebildeten Mantel zusammengehalten werden, der die Elektrokabel 1 gegen eine axiale Verschiebung sichert .The three-conductor cable shown in FIG. 2 and designated as a whole by 10 has three electrical cables 1 of the type described above which are distributed with one another. In a special embodiment of the invention, the three electrical cables 1 stranded together can at most additionally be held together by a sheath enveloping them, for example in the form of a bandage or hose, which secures the electrical cables 1 against axial displacement.
Das erfindungsgemässe Dreileiterkabel weist gegenüber den eingangs beschriebenen Hochfrequenzkabeln die Vorteile auf, dass es bei gleicher Leistungsfähigkeit einen absolut symmetrischen Spannungsabfall auf allen drei Adern aufweist, der kleiner ausfällt als bei den herkömmlichen Kabeln. Gleichzeitig wird durch die erfindungsgemässe Konstruktion ein kleineres mechanisches Biegemoment erreicht und es ist dank dem einfachen Aufbau die Anschlussgestaltung im Verbindungsstecker einfach zu realisieren. Ferner ist keine zusätzliche Zentrums-Blindader zur definierten Verseilung notwendig, so dass das Kabel dadurch leichter und flexibler wird.The three-wire cable according to the invention has the advantages over the high-frequency cables described at the outset that, with the same performance, it has an absolutely symmetrical voltage drop on all three wires, which is smaller than that of the conventional cables. At the same time, a smaller mechanical bending moment is achieved by the construction according to the invention and, thanks to the simple construction, the connection design in the connecting plug is easy to implement. Furthermore, no additional center dummy wire for the defined stranding is necessary, so that the cable becomes lighter and more flexible.
Des weiteren wird durch die erfindungsgemässe Konstruktion die Personensicherheit erhöht. Bevor der Phasenleiter durch Verletzung mit einem metallischen Gegenstand berührt werden kann, muss nämlich der das Erdpotential führende Neu- tral-Leiter verletzt werden. Dies hat zur Folge, dass im Verletzungsfall die Phase mit dem Erdpotential kurz geschlossen wird, bevor man sie unter Spannung berühren kann.Furthermore, personal safety is increased by the construction according to the invention. Before the phase conductor is touched by a metallic object the neutral conductor carrying the earth potential must be injured. This means that in the event of an injury, the phase with the earth potential is briefly closed before it can be touched under voltage.
Gegenüber den bekannten Vierleiter-Kabel weist das Dreileiter-Kabel weitere Vorteile, wie eine klare Separierung von Steueradern und Phasen-Leitern, ein verbessertes EMV-Ver- halten und eine stabilere Verteilung auf. Gegenüber den bekannten Kabeln mit symmetrischer Kabelanordnung zeigt das erfindungsgemässe Dreileiterkabel noch zusätzlich eine verbesserte Wärmeabstrahlung.Compared to the known four-wire cable, the three-wire cable has other advantages, such as clear separation of control wires and phase wires, improved EMC behavior and a more stable distribution. Compared to the known cables with a symmetrical cable arrangement, the three-wire cable according to the invention additionally shows an improved heat radiation.
Das erfindungsgemässe Dreileiterkabel ist im Frequenzbereich ab 50 Hz verwendbar. Es bietet der symmetrische Aufbau mit dem verhältnismässig grossen Querschnitt des Rückleiters optimale Voraussetzungen für Verbindungen von asymmetrischen Lasten. Der symmetrische Aufbau bietet zudem markante Vorteile für flexible Verbindungen zwischen USV Geräten und Datenverarbeitungsanlagen, Radarstationen, sowie Sendeanlagen, Inverter - Motorverbindungen mit höheren EMV Anforderungen etc.The three-wire cable according to the invention can be used in the frequency range from 50 Hz. The symmetrical structure with the relatively large cross-section of the return conductor offers optimal conditions for connecting asymmetrical loads. The symmetrical structure also offers distinctive advantages for flexible connections between UPS devices and data processing systems, radar stations, as well as transmitter systems, inverter - motor connections with higher EMC requirements, etc.
Es sei an dieser Stelle darauf hingewiesen, dass das anhand der Figur 1 beschriebene Elektrokabel sowie auch das in der Figur 2 dargestellte Dreileiterkabel nur eine Auswahl von mehreren möglichen Ausführungsformen der Erfindung darstellen und in verschiedener Hinsicht geändert werden können.At this point it should be pointed out that the electrical cable described with reference to FIG. 1 and also the three-wire cable shown in FIG. 2 represent only a selection of several possible embodiments of the invention and can be changed in various respects.
So besteht beispielsweise die Möglichkeit, die Steueradern nicht im Neutral- und/oder Rückleiter sondern im jeweiligen Phasenleiter einzubetten, und zwar so, wie dies bei bereits bekannten Hochfrequenzkabeln der Fall ist. Ferner können die symmetrisch verteilten Einzelleiter 4 anstatt verseilt, mäanderförmig um den Phasenleiter herum angeordnet sein, und es kann die Schutzhülle 3 nur aus einer ex- trudierten Kunststoffschicht bestehen. For example, it is possible to embed the control wires not in the neutral and / or return conductor but in the respective phase conductor, in the same way as is the case with already known high-frequency cables. Furthermore, the symmetrically distributed individual conductors 4 can be arranged in a meandering manner around the phase conductor instead of being stranded be, and the protective cover 3 can only consist of an extruded plastic layer.

Claims

PATENTANSPRÜCHE
1. Dreileiterkabel bestehend aus drei miteinander verseilten Elektrokabeln mit je einer Ader, die einen Stromleiter (2) besitzt, und einem Neutral- und/oder Rückleiter, dadurch gekennzeichnet, dass der Neutral- und/oder Rückleiter jedes Elektrokabels aus einer Anzahl von Einzelleitern (4) gebildet wird, die konzentrisch um den Stromleiter (2) herum verteilt sind, dass zwischen dem Stromleiter (2) und den verteilten Einzelleitern (4) des Neutral- und/oder Rückleiters eine Isolation (3) vorgesehen ist und dass über dem Neutral- und/oder Rückleiter noch zudem ein Schutzmantel1. three-conductor cable consisting of three stranded electrical cables, each with a wire that has a current conductor (2), and a neutral and / or return conductor, characterized in that the neutral and / or return conductor of each electrical cable consists of a number of individual conductors ( 4) is formed, which are distributed concentrically around the current conductor (2), that an insulation (3) is provided between the current conductor (2) and the distributed individual conductors (4) of the neutral and / or return conductor and that above the neutral - And / or return conductor also a protective jacket
(7) aufgebracht ist.(7) is applied.
2. Dreileiterkabel nach Anspruch 1, dadurch gekennzeichnet, dass der Stromleiter (2) jedes Elektrokabels mit einer extrudierten Kunststoffisolation umspritzt ist.2. Three-wire cable according to claim 1, characterized in that the current conductor (2) of each electric cable is extrusion-coated with an extruded plastic insulation.
3. Dreileiterkabel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in jedem durch zum Beispiel acht Einzelleiter (4) gebildeten, konzentrisch geführten Neutral- und/oder Rückleiter, Blindadern (5) und Steueradern (6) eingebettet sind, die zu Kontroll-, Überwachungs-, Mess- und Steuerzwecken mitgeführt werden.3. Three-wire cable according to claim 1 or 2, characterized in that in each of, for example, eight individual conductors (4) formed, concentrically guided neutral and / or return conductors, dummy wires (5) and control wires (6) are embedded, which are used for control , Monitoring, measuring and control purposes.
4. Dreileiterkabel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in jedem Stromleiter (2) Steueradern eingebettet sind, die zu Kontroll-, Überwachungs-, Mess- und Steuerzwecken mitgeführt werden.4. three-wire cable according to claim 1 or 2, characterized in that in each conductor (2) control wires are embedded, which are carried for control, monitoring, measurement and control purposes.
5. Dreileiterkabel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass über jedem Neutral- und/oder Rückleiter ein Vliessband (7) und über diesem ein vorzugsweise aus Kunststoff bestehender Schutzmantel, (8) aufgebracht ist. 5. Three-wire cable according to one of claims 1 to 4, characterized in that a fleece tape (7) and a preferably made of plastic protective sheath (8) is applied over each neutral and / or return conductor.
6. Dreileiterkabel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die drei Elektrokabel (1) durch einen sie umhüllenden Mantel (9) zusammengehalten werden.6. Three-wire cable according to one of claims 1 to 5, characterized in that the three electric cables (1) are held together by a sheath (9) enveloping them.
7. Hochfrequenz-Elektrokabel zur Energieübertragung mit einer Frequenz von mindestens 50 Hz, gekennzeichnet durch ein Dreileiterkabel gemäss einem der Ansprüche 1 bis 6. 7. High-frequency electrical cable for energy transmission with a frequency of at least 50 Hz, characterized by a three-wire cable according to one of claims 1 to 6.
EP03745241A 2002-04-03 2003-04-02 Three-conductor cable Expired - Lifetime EP1490881B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH551022002 2002-04-03
CH00551/02A CH695967A5 (en) 2002-04-03 2002-04-03 Electrical cable.
PCT/CH2003/000211 WO2003083879A1 (en) 2002-04-03 2003-04-02 Three-conductor cable

Publications (2)

Publication Number Publication Date
EP1490881A1 true EP1490881A1 (en) 2004-12-29
EP1490881B1 EP1490881B1 (en) 2006-08-09

Family

ID=28458263

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Application Number Title Priority Date Filing Date
EP03745241A Expired - Lifetime EP1490881B1 (en) 2002-04-03 2003-04-02 Three-conductor cable

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US (1) US7164084B2 (en)
EP (1) EP1490881B1 (en)
CN (1) CN100405508C (en)
AT (1) ATE336072T1 (en)
AU (1) AU2003215483B2 (en)
CH (1) CH695967A5 (en)
DE (1) DE50304575D1 (en)
ES (1) ES2270068T3 (en)
WO (1) WO2003083879A1 (en)

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Also Published As

Publication number Publication date
CN100405508C (en) 2008-07-23
ATE336072T1 (en) 2006-09-15
EP1490881B1 (en) 2006-08-09
CH695967A5 (en) 2006-10-31
WO2003083879A1 (en) 2003-10-09
DE50304575D1 (en) 2006-09-21
ES2270068T3 (en) 2007-04-01
US7164084B2 (en) 2007-01-16
AU2003215483B2 (en) 2009-01-08
AU2003215483A1 (en) 2003-10-13
CN1643623A (en) 2005-07-20
US20050167150A1 (en) 2005-08-04

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