EP0076229A1 - Flexible electric cord - Google Patents

Flexible electric cord Download PDF

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Publication number
EP0076229A1
EP0076229A1 EP82730124A EP82730124A EP0076229A1 EP 0076229 A1 EP0076229 A1 EP 0076229A1 EP 82730124 A EP82730124 A EP 82730124A EP 82730124 A EP82730124 A EP 82730124A EP 0076229 A1 EP0076229 A1 EP 0076229A1
Authority
EP
European Patent Office
Prior art keywords
wire
wires
current
rubber
electrically
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.)
Ceased
Application number
EP82730124A
Other languages
German (de)
French (fr)
Inventor
Klaus Dipl.-Ing. Lotter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0076229A1 publication Critical patent/EP0076229A1/en
Ceased 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
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/028—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients with screen grounding means, e.g. drain wires
    • 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

Definitions

  • Connecting cables for electrically operated hand-held devices for household and handicraft are subject to particularly high mechanical stresses on the insertion of the line into the device or on the plug connection. Even with the help of commercially available anti-kink sleeves, overstressing the copper conductors in the areas of the device entry and the plug cannot be reliably avoided. For example, when cleaning up irons, the connecting cable is often simply wrapped around the handle and severely kinked at the connection end.
  • the invention provides a flexible electrical line, which is provided at nominal voltages up to 1000 V for the supply of portable electrical devices, such as hand-held devices for household and handicraft, and which enables reliable protection against accidental contact in the event of conductor breaks.
  • the line consisting of three wires stranded together and a plastic sheath surrounding the wires that the two current-carrying wires have an outer layer made of electrically conductive plastic or rubber and that the third wire is bare or with an electrically conductive plastic or rubber layer . coated conductor is formed.
  • the third wire and in each case the conductor of a current-carrying wire form a circuit interrupted by the wire insulation. In the event of damage, this circuit is closed. If you now see a fuse element at the plug end of the line, which is connected between the third wire and the two current-carrying wires, this responds in the event of damage and switches off the connecting line including the device from the power source.
  • the corresponding securing element can, for example, be accommodated in the housing of the mains plug, or the mains plug is provided with a corresponding adapter.
  • the figure shows a round, three-core plastic hose line, the current-carrying wires 1 and 2 are stranded with the earth wire 4/5 to the cable core.
  • the insulation of each live wire is provided with an outer conductive layer 3, while the earth wire from the conductor 4th and an electrically conductive plastic casing 5.
  • the cores stranded together are embedded in the plastic jacket 6.

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  • Insulated Conductors (AREA)
  • Cable Accessories (AREA)

Abstract

The flexible cable supplies power to movable equipment with rated voltages up to 1,000V., esp. hand-held tools, and has three wires twisted together and sheathed in a plastics or rubber sleeve. The two wires (1,2) that carry current have an outer layer (3) composed of electrically-conducting plastic or rubber. The third wire (the ground wire) is either a plain wire or a wire (4) covered in an electrically-conducting plastic or rubber layer (5). The outer sheaths of all three wires are electrically connected since they touch one another. A break in one of the current-carrying wires - a break causing a failure in the insulation - results in the current-carrying wire being electrically connected to the ground wire. A fuse between the ground wire and the current wires (and located in a plug) therefore burns out.

Description

Anschlußleitungen für elektrisch betriebene Handgeräte für Haushalt und Handwerk unterliegen besonders hohen mechanischen.Beanspruchungen an der Einführung der Leitung in das Gerät oder am Steckeranschluß. Selbst mit Hilfe handelsüblicher Knickschutztüllen läßt sich mitunter eine Überbeanspruchung der Kupferleiter in den Bereichen der Geräteeinführung und des Steckers nicht zuverlässig vermeiden. Beispielsweise beim Aufräumen von Bügeleisen wird die Anschlußleitung häufig einfach um den Griff gewickelt und dabei am Anschlußende stark geknickt.Connecting cables for electrically operated hand-held devices for household and handicraft are subject to particularly high mechanical stresses on the insertion of the line into the device or on the plug connection. Even with the help of commercially available anti-kink sleeves, overstressing the copper conductors in the areas of the device entry and the plug cannot be reliably avoided. For example, when cleaning up irons, the connecting cable is often simply wrapped around the handle and severely kinked at the connection end.

Durch zu starke Beanspruchung der Anschlußleitung kann es zu Drahtbrüchen in den stromführenden Leitern kommen. Die gebrochenen Einzeldrähte können im weiteren Betrieb der Leitung die Isolierung und den Außenmantel durchstechen. Wird dabei der Leiter einer benachbarten Ader getroffen, so kommt es zum Kurz- bzw. zum Erdschluß und die entsprechende Sicherung spricht an. Wird jedoch die benachbarte Ader nicht getroffen, so ist für den, der die Leitung berührt, ein Schutz nur dann gegeben, wenn für das mit der Anschlußleitung versehene Gerät eine Fehlerstromschutzschaltung vorgesehen ist. Dies ist jedoch häufig nicht der Fall und beispielsweise für Haushaltsgeräte auch nicht vorgeschrieben.Excessive stress on the connecting cable can lead to wire breaks in the live conductors. The broken individual wires can pierce the insulation and the outer jacket during further operation of the line. If the conductor of an adjacent wire is hit, a short-circuit or an earth fault occurs and the corresponding fuse responds. However, if the adjacent wire is not hit, protection is only given to those who touch the line if a residual current circuit is provided for the device provided with the connecting line. However, this is often not the case and is not required for household appliances, for example.

Die erwähnten Brüche einzelner Drähte der Leiter können Ursache für eine Zerstörung der Aderisolation und des Leitungsmantels werden, so daß der Leiter ungeschützt im Griffbereich des Benutzers liegt, ohne daß ein Sicherungsorgan die Leitung bzw. das Gerät abschaltet.The aforementioned breaks in individual wires of the conductors can cause destruction of the wire insulation and the cable sheath, so that the conductor lies unprotected in the user's grip area without a safety device switching off the line or the device.

Durch die Erfindung wird eine flexible elektrische Leitung geschaffen, die bei Nennspannungen bis zu 1000 V zur Stromversorgung ortsveränderlicher elektrischer Geräte, wie Handgeräte für Haushalt und Handwerk, vorgesehen ist und die einen zuverlässigen Berührungsschutz bei Leiterbrüchen ermöglicht. Hierzu ist bei der aus drei miteinander verseilten Adern und einem die Adern umgebenden Kunststoffmantel bestehenden Leitung vorgesehen, daß die beiden stromführenden Adern eine äußere Schicht aus elektrisch leitendem Kunststoff oder Gummi aufweisen und daß die dritte Ader als blanker oder mit einer elektrisch leitenden Kunststoff- oder Gummischicht. überzogener Leiter ausgebildet ist.The invention provides a flexible electrical line, which is provided at nominal voltages up to 1000 V for the supply of portable electrical devices, such as hand-held devices for household and handicraft, and which enables reliable protection against accidental contact in the event of conductor breaks. For this purpose, it is provided in the case of the line consisting of three wires stranded together and a plastic sheath surrounding the wires that the two current-carrying wires have an outer layer made of electrically conductive plastic or rubber and that the third wire is bare or with an electrically conductive plastic or rubber layer . coated conductor is formed.

Bei einer derartigen Leitung bilden im gesunden Zustand die dritte Ader und jeweils der Leiter einer stromführenden Ader einen durch die Aderisolierung unterbrochenen Stromkreis. Im Schadensfall wird dieser Stromkreis geschlossen. Sieht man nun am steckerseitigen Ende der Leitung ein Sicherungselement vor, das zwischen die dritte Ader und die beiden stromführenden Adern geschaltet ist, so spricht dieses im Schadensfall an und schaltet die Anschlußleitung einschließlich des Gerätes von der Stromquelle ab. Das entsprechende Sicherungselement kann beispielsweise in dem Gehäuse des Netzsteckers untergebracht sein, oder der Netzstecker ist mit einem entsprechenden Adapter versehen.With a line of this type, in the healthy state, the third wire and in each case the conductor of a current-carrying wire form a circuit interrupted by the wire insulation. In the event of damage, this circuit is closed. If you now see a fuse element at the plug end of the line, which is connected between the third wire and the two current-carrying wires, this responds in the event of damage and switches off the connecting line including the device from the power source. The corresponding securing element can, for example, be accommodated in the housing of the mains plug, or the mains plug is provided with a corresponding adapter.

Ein Ausführungsbeispiel der neuen Leitung ist in der Figur dargestellt.An embodiment of the new line is shown in the figure.

Die Figur zeigt eine-runde, dreiadrige Kunststoffschlauchleitung, deren stromführende Adern,1 und 2 mit der Erdader 4/5 zur Leitungsseele verseilt sind. Die Isolierung jeder stromführenden Ader ist mit einer äußeren Leitschicht 3 versehen, während die Erdader aus dem Leiter 4 und einer elektrisch leitenden Kunststoffumhüllung 5 besteht. Die miteinander verseilten Adern sind in den Kunststoffmantel 6 eingebettet.The figure shows a round, three-core plastic hose line, the current-carrying wires 1 and 2 are stranded with the earth wire 4/5 to the cable core. The insulation of each live wire is provided with an outer conductive layer 3, while the earth wire from the conductor 4th and an electrically conductive plastic casing 5. The cores stranded together are embedded in the plastic jacket 6.

Claims (1)

Flexible elektrische Leitung zur Stromversorgung ortsveränderlicher elektrischer Geräte, wie Handgeräte für Haushalt und Handwerk, bei Nennspannungen bis 1000 V, bestehend aus drei miteinander verseilten Adern, die von einem Kunststoff- oder Gummimantel umgeben sind, dadurch gekennzeichnet ,
daß die beiden stromführenden Adern (1, 2) eine äußere Schicht (3) aus elektrisch leitendem Kunststoff oder Gummi aufweisen
und daß die dritte Ader als blanker oder mit einer elektrisch leitenden Kunststoff- oder Gummischicht (5) überzogener Leiter (4) ausgebildet ist.Flexible electrical cable for the power supply of portable electrical devices, such as hand-held devices for household and handicrafts, at nominal voltages up to 1000 V, consisting of three wires stranded together, which are surrounded by a plastic or rubber jacket, characterized in that
that the two current-carrying wires (1, 2) have an outer layer (3) made of electrically conductive plastic or rubber
and that the third wire is formed as a bare or with an electrically conductive plastic or rubber layer (5) coated conductor (4).
EP82730124A 1981-09-28 1982-09-23 Flexible electric cord Ceased EP0076229A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813139016 DE3139016A1 (en) 1981-09-28 1981-09-28 FLEXIBLE ELECTRICAL LINE
DE3139016 1981-09-28

Publications (1)

Publication Number Publication Date
EP0076229A1 true EP0076229A1 (en) 1983-04-06

Family

ID=6143121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82730124A Ceased EP0076229A1 (en) 1981-09-28 1982-09-23 Flexible electric cord

Country Status (2)

Country Link
EP (1) EP0076229A1 (en)
DE (1) DE3139016A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100887116B1 (en) * 2000-12-29 2009-03-04 에릭슨 인크. Class e doherty amplifier topology for high efficiency signal transmitters
CN103578620A (en) * 2013-11-25 2014-02-12 刘志平 Double-layered rubber insulation flexible cable and preparation method thereof
CN105131443A (en) * 2015-08-17 2015-12-09 繁昌县菲德通讯材料设计有限公司 Anti-ageing shock-resistant modified butyl-rubber cable material
EP3276635B1 (en) * 2016-07-28 2020-02-05 REV Ritter GmbH Rubber or plastic hose line and method for its manufacture

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1028644B (en) * 1954-11-27 1958-04-24 Siemens Ag Movable, multi-core, rubber-insulated low-voltage power line for mining operations with conductive rubber-covered auxiliary conductors in the interstices of the main cores
US3322889A (en) * 1963-09-19 1967-05-30 Ass Elect Ind Electric trailing cables with failure limiting means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1028644B (en) * 1954-11-27 1958-04-24 Siemens Ag Movable, multi-core, rubber-insulated low-voltage power line for mining operations with conductive rubber-covered auxiliary conductors in the interstices of the main cores
US3322889A (en) * 1963-09-19 1967-05-30 Ass Elect Ind Electric trailing cables with failure limiting means

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100887116B1 (en) * 2000-12-29 2009-03-04 에릭슨 인크. Class e doherty amplifier topology for high efficiency signal transmitters
CN103578620A (en) * 2013-11-25 2014-02-12 刘志平 Double-layered rubber insulation flexible cable and preparation method thereof
CN103578620B (en) * 2013-11-25 2016-06-29 刘志平 A kind of double-deck cabtyre cable and preparation method thereof
CN105131443A (en) * 2015-08-17 2015-12-09 繁昌县菲德通讯材料设计有限公司 Anti-ageing shock-resistant modified butyl-rubber cable material
EP3276635B1 (en) * 2016-07-28 2020-02-05 REV Ritter GmbH Rubber or plastic hose line and method for its manufacture

Also Published As

Publication number Publication date
DE3139016A1 (en) 1983-04-14

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19830826

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Effective date: 19850629

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Inventor name: LOTTER, KLAUS, DIPL.-ING.