DE3016131A1 - Telecommunications cable with humidity detector - comprising one bare conductor and one conductor insulated with water-soluble material - Google Patents
Telecommunications cable with humidity detector - comprising one bare conductor and one conductor insulated with water-soluble materialInfo
- Publication number
- DE3016131A1 DE3016131A1 DE19803016131 DE3016131A DE3016131A1 DE 3016131 A1 DE3016131 A1 DE 3016131A1 DE 19803016131 DE19803016131 DE 19803016131 DE 3016131 A DE3016131 A DE 3016131A DE 3016131 A1 DE3016131 A1 DE 3016131A1
- Authority
- DE
- Germany
- Prior art keywords
- water
- conductor
- bare
- insulated
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
- H01B7/322—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising humidity sensing means
Abstract
A telecommunication cable comprises a number of insulated pairs of conductors and a device for determining the humidity condition of the cable. This humidity-determining device consists of one bare conductor (10) and another conductor (11) insulated with an easily water-soluble material, more specifica-ly PVA or polyethylene oxide. The bare and the insulated conductor may be twisted together or may run generally parallel and be wrapped with a helical sheet (13), esp. of a rubber-elastics material which shrinks in the presence of water. With this arrangement, the presence of water is indicated by contact between the two conductors and the resultant change in the electrical circuit which they constitute. The twisting together of the conductors and/or the wrapping with the shrinking material ensures that they remain in close contact with each other. Arrangement enables the presence of moisture in the cable to be easily detected.
Description
Nachrichtenkabel mit einer Vorrichtung zur Bestimmung des Feuchtezustandes Die Erfindung bezieht sich auf ein Nachrichtenkabel mit mehreren isolierten Aderpaaren und mit einer Vorrichtung zur Bestimmung des Feuchtezustandes des Kabels in Form eines Meldepaares.Communication cable with a device for determining the moisture level The invention relates to a communication cable with a plurality of isolated wire pairs and with a device for determining the moisture level of the cable in the form of a message pair.
Vielpaarige, nicht längswasserdichte Nachrichtenkabel, deren Seele aus kunstatsffisolierten Adern besteht, enthalten einen Leerraum von etwa 45 96 des Seelenquerschnittes. Bei einer Beschädigung des Kabelmantels oder bei einem versehentlich offenen Kabelende kann sich daher relativ viel Wasser zwischen den einzelnen Adern innerhalb des Kabels ansammeln. Dadurch werden aber die Der tragungseigenschaften des Kabels erheblich beeinträchtigt. In dem vom Wasser betroffenen Kabelabschnitt kann die Betriebakapazität bis auf den dreifachen Wert ansteigen. Der Isolationswiderstand kann sich vermindern, und unter ungünstigen Umständen kann es während des späteren Betriebes aufgrund elektrolytischer Korrosion zur Unterbrechung von Sprechkreisen kommen.Multi-pair, not longitudinally watertight communication cables, their soul consists of plastic-insulated cores, contain a space of about 45 96 of the soul cross-section. If the cable jacket is damaged or if there is a Accidentally open cable ends can therefore cause a relatively large amount of water between the accumulate individual wires within the cable. However, this increases the load-bearing properties of the cable is significantly impaired. In the cable section affected by the water the operating capacity can increase up to three times the value. The insulation resistance can diminish, and under unfavorable circumstances it can during the later Operation due to electrolytic corrosion to interrupt speech circuits come.
Es ist daher wichtig, eine Ansammlung von Wasser in einem Nachrichtenkabel rechtzeitig erkennen bzw. die Wasserfreiheit eines Kabels vor seiner Verlegung überprüfen zu können. Bisher wurde z. B. in einem Nachrichtenkabel ein Meldepaar mit eingeseilt, dessen Isolationswiderstand überwacht wurde. Als Meldepaar sind beispielsweise zwei besonders ausgebildete Adern verwendet worden, deren Isolation so beschaffen ist, daß der Isolationswiderstand beim Eindringen von Feuchte sich verändert. Insbesondere verwendet man zu diesem Zweck Meldeleiter mit einer perforierten Isolierung (DE-AS 10 59 062 und DE-OS 28 06 718). Außerdem ist es auch bekannt, innerhalb der Kabelseele ein Material anzuordnen, das bei Berührung mit Wasser einen Farbumschlag erleidet (DE-OS 23 20 478). Die Verwendung eines Farbindikators hat den Nachteil, daß eine nachträgliche Überprüfung des Kabels auf Wasseransammlung nur bei einer Zerstörung des Kabelmantels möglich ist.It is therefore important to avoid a build-up of water in a communications cable Recognize in good time or check that a cable is free of water before laying it to be able to. So far z. B. in a message cable a message pair with roped, whose insulation resistance was monitored. The message pair is, for example, two specially trained cores have been used, the insulation of which is designed in such a way that that the insulation resistance changes when moisture penetrates. In particular one uses a message ladder for this purpose a perforated Isolation (DE-AS 10 59 062 and DE-OS 28 06 718). Besides, it is also known to arrange a material within the cable core, which on contact with water a Color change suffers (DE-OS 23 20 478). Has the use of a color indicator the disadvantage that a subsequent check of the cable for water accumulation is only possible if the cable jacket is destroyed.
Der Erfindung liegt die Aufgabe zugrunde, eine leicht überprüfbare und mit geringem Aufwand herstellbare Vorrichtung zur Kontrolle des Feuchtezustandes in einem Nachrichtenkabel zu schaffen. Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß ein Meldepaar verwendet wird, das aus einem blanken und einem isolierten Leiter besteht, dessen Isolierung leicht wasserlöslich ist. Verwendet man ein solches Meldepaar und dringt Wasser in ein damit ausgerüstetes Nachrichtenkabel, wird sich in relativ kurzer Zeit die Isolierung der einen Meldeader auflösen, und es kommt zu einem Kontakt mit dem blanken Leiter des Meldepaares, der Jederzeit überprüfbar ist.The invention is based on the object of an easily verifiable and a device that can be manufactured with little effort to control the moisture level to create in a communication cable. This object is achieved according to the invention solved that a message pair is used, which consists of a bare and an isolated There is a conductor, the insulation of which is easily soluble in water. If you use such a Detection couple and if water penetrates a communication cable equipped with it, it becomes dissolve the isolation of a message wire in a relatively short time, and it comes to a contact with the bare conductor of the reporting pair, which can be checked at any time is.
Als leicht wasserlösliches Isoliermaterial bevorzugt man Polyvinylalkohol oder Polyäthylenoxyd.Polyvinyl alcohol is preferred as a readily water-soluble insulating material or polyethylene oxide.
Um einen guten Kontakt bei Auflösung der Isolierung des einen Leiters des Meldepaares mit dem blanken Leiter sicherzustellen, empfiehlt es sich, beide Leiter miteinander zu verseilen. Der Kontakt kann auch dadurch verbessert werden, daß beide Leiter des Meldepaares gemeinsam mit einer Wendel umsponnen werden. Die Kontaktwirkung kann weiterhin erhöht werden dadurch, daß die Wendel aus einem gummielastischen Material besteht oder aus einem Material, das bei Wasserzutritt schrumpft.To ensure good contact when the insulation of one conductor is broken of the signaling pair with the bare conductor, it is advisable to use both Stranding conductors together. Contact can also be improved by that both heads of the reporting pair are wound together with a helix. the The contact effect can be further increased by the fact that the coil is made of a rubber-elastic one Material consists or of a material that shrinks when water is exposed.
Die Erfindung wird anhand des in der Zeichnung dargestellten und nachfolgend beschriebenen Ausführungsbeispieles im einzelnen erläutert.The invention is illustrated with reference to the drawing and below described embodiment explained in detail.
In der einzigen Figur ist ein senkrechter Schnitt durch ein Meldepaar gemäß der Erfindung dargestellt. Das Meldepaar besteht aus einem blanken Leiter 10 und einem isolierten Leiter 11. Die Isolierung 12 des isolierten Leiters 11 ist leicht wasserlöslich ausgebildet. Sie besteht beispielsweise aus Polyvinylalkohol, das durch Extrusion auf den blanken Leiter aufgebracht worden ist.In the single figure is a vertical section through a message pair shown according to the invention. The signaling pair consists of a bare conductor 10 and an insulated conductor 11. The insulation 12 of the insulated conductor 11 is easily soluble in water. It consists, for example, of polyvinyl alcohol, which has been applied to the bare conductor by extrusion.
Beide Leiter sind mit einer Wendel aus einem elastischen oder bei Wasserzutritt schrumpfenden Material 13 umsponnen.Both conductors are made of an elastic or with a helix Water access shrinking material 13 wound.
1 Figur 6 Ansprüche1 Figure 6 claims
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803016131 DE3016131A1 (en) | 1980-04-23 | 1980-04-23 | Telecommunications cable with humidity detector - comprising one bare conductor and one conductor insulated with water-soluble material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803016131 DE3016131A1 (en) | 1980-04-23 | 1980-04-23 | Telecommunications cable with humidity detector - comprising one bare conductor and one conductor insulated with water-soluble material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3016131A1 true DE3016131A1 (en) | 1981-10-29 |
Family
ID=6101015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19803016131 Withdrawn DE3016131A1 (en) | 1980-04-23 | 1980-04-23 | Telecommunications cable with humidity detector - comprising one bare conductor and one conductor insulated with water-soluble material |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3016131A1 (en) |
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| US4972179A (en) * | 1988-08-18 | 1990-11-20 | Junkosha Co., Ltd. | Liquid leakage detection apparatus including wheatstone bridge |
| CN108470601A (en) * | 2018-05-23 | 2018-08-31 | 江苏中利集团股份有限公司 | A kind of cable with monitoring line |
| EP3505078A3 (en) * | 2017-12-28 | 2019-07-31 | Ethicon LLC | Surgical instrument with a hardware-only control circuit |
| US11202570B2 (en) | 2017-12-28 | 2021-12-21 | Cilag Gmbh International | Communication hub and storage device for storing parameters and status of a surgical device to be shared with cloud based analytics systems |
| US11213294B2 (en) | 2018-03-28 | 2022-01-04 | Cilag Gmbh International | Surgical instrument comprising co-operating lockout features |
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-
1980
- 1980-04-23 DE DE19803016131 patent/DE3016131A1/en not_active Withdrawn
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