DE1038140B - Electric cable, in particular power cable, with a device for monitoring its operating temperature - Google Patents
Electric cable, in particular power cable, with a device for monitoring its operating temperatureInfo
- Publication number
- DE1038140B DE1038140B DES37610A DES0037610A DE1038140B DE 1038140 B DE1038140 B DE 1038140B DE S37610 A DES37610 A DE S37610A DE S0037610 A DES0037610 A DE S0037610A DE 1038140 B DE1038140 B DE 1038140B
- Authority
- DE
- Germany
- Prior art keywords
- cable
- temperature
- change
- changes
- conductor
- 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.)
- Pending
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
- H01B7/324—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising temperature sensing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/34—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using capacitative elements
- G01K7/343—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using capacitative elements the dielectric constant of which is temperature dependant
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermally Actuated Switches (AREA)
- Locating Faults (AREA)
Description
Die Betriebssicherheit von Starkstromkabeln, insbesondere von Hochspannungsenergiekabeln, wird bekanntlich bei der Überschreitung einer bestimmten Kabeltemperatur herabgesetzt, weil dann mit einer das Kabel gefährdenden-Verringerung der elektrischen Durchschlagsfestigkeit der Isolierung gerechnet werden muß. Daher liegen verschiedene Vorschläge für die Überwachung der Temperatur in Betrieb befindlicher elektrischer Leitungen und Kabel vor. So wurden beispielsweise Prüfdrähte in das Leitungsseil oder in die Zwickelräume von Starkstromkabeln gelegt, aus deren Widerstandsänderung auf die im Kabel herrschenden Temperaturverhältnisse geschlossen wurde.The operational safety of power cables, particularly high-voltage power cables, is becoming known when a certain cable temperature is exceeded, because then with a endangering the cable-reducing the electrical Dielectric strength of the insulation must be expected. Therefore, there are various proposals for monitor the temperature of operating electrical lines and cables. So were For example, test wires are laid in the cable or in the interstices of power cables whose change in resistance was inferred from the temperature conditions prevailing in the cable.
Ohne Verwendung elektrischer Hilfsmittel wurden auch schon in besonders in das Kabelinnere eingefügten Rohren oder Hohldrähten Gas- oder Flüssigkeitsmengen allseitig abgeschlossen, deren Druck- oder Volumensteigerung dann auch ein Maß für einen Temperaturanstieg im Kabel war.Without the use of electrical aids, they have already been inserted especially into the interior of the cable Pipes or hollow wires, gas or liquid quantities closed on all sides, their pressure or The increase in volume was then also a measure of an increase in temperature in the cable.
Diese bekannten Verfahren gestatten jedoch nur, über die ganze Kabellänge integrierend auf eine gemittelte Kabeltemperatur zu schließen. Damit ist es nicht möglich, beispielsweise an bestimmten Kabelstellen eine etwa durch besondere ungünstige Betriebsverhältnisse oder sich allmählich herausbildende Feh- ler eintretende unzulässige Erwärmung des Kabels festzustellen und hinsichtlich ihres Ortes einzumessen. Es ist aber für die Betriebssicherheit des Kabels notwendig, dafür zu sorgen, daß die Temperatur der Isolierung an keiner Stelle der Kabellänge einen kritisehen Wert überschreitet. Sollte ein solcher Fall aus den oben genannten Gründen doch eintreten, dann sollte die betreffende Kabelstelle einmeßbar sein.However, these known methods only allow integrating to an averaged over the entire cable length Close cable temperature. So it is not possible, for example at certain cable points a malfunction that may be caused by particularly unfavorable operating conditions or gradually ler occurring inadmissible heating of the cable and to measure its location. However, for the operational safety of the cable it is necessary to ensure that the temperature of the insulation at no point of the cable length a criticism Value exceeds. Should such a case arise for the reasons mentioned above, then the cable point concerned should be measurable.
Dieses Problem darf aber nicht mit der Aufgabe verwechselt werden, die darin besteht, in der Isolierung des Kabels auftretende Fehler anzuzeigen und auch die Stelle des Fehlerortes durch Messung zu bestimmen. Zur Lösung der zuletzt genannten Aufgabe ist bereits so vorgegangen worden, daß ein besonderes Leitersystem im Kabel angeordnet wurde. Einer der Leiter besteht dabei aus leicht schmelzbaren Metallen und ist von den anderen durch durchlässigen Isolierstoff getrennt. Im allgemeinen wird sich da, wo ein Spannungsdurchbruch erfolgt, vorher in der Isolation des Kabels eine örtliche Erwärmung einstellen. Sie soll ausreichen, um das leicht schmelzbare Metall des einen Leiters zum Schmelzen zu bringen und dadurch einen Signalstromkreis zu schließen. Die örtliche Erwärmung an der Fehlerstelle bewirkt somit in der Überwachungsleitung eine dauernde Veränderung, die auch bestehen bleibt, wenn die Kabelstrecke abgeschaltet wird und dann die Fehlerstelle sich wieder abkühlt. Um daher die Überwachungsleitung wieder betriebsbereit zu machen, ist es erforderlich, den bestehenden Elektrisches Kabel,This problem must not be confused with the task of isolation of the cable to indicate errors occurring and also to determine the location of the error by measurement. To solve the last-mentioned problem has already been proceeded so that a special Conductor system was arranged in the cable. One of the conductors consists of easily fusible metals and is separated from the others by permeable insulating material. In general, it will be where a Voltage breakdown occurs, set a local heating in the insulation of the cable beforehand. she should be sufficient to melt the easily fusible metal of one conductor and thereby to close a signal circuit. The local heating at the point of failure thus causes the Monitoring line a permanent change that remains even if the cable route is switched off and then the fault cools down again. Therefore the monitoring line is ready for operation again to make it is necessary to replace the existing electrical cable,
insbesondere Energiekabel,especially power cables,
mit einer Einrichtung zur überwachungwith a device for monitoring
seiner Betriebstemperaturits operating temperature
Anmelder:Applicant:
Süddeutsche Kabelwerke,Süddeutsche Kabelwerke,
Zweigniederlassung derBranch of the
Vereinigte Deutsche Metallwerke A. G.,United German Metalworks A. G.,
Mannheim, Waldhofstr. 244Mannheim, Waldhofstr. 244
Dipl.-Ing. Franz Simons, Mannheim-Rheinau,
ist als Erfinder genannt wordenDipl.-Ing. Franz Simons, Mannheim-Rheinau,
has been named as the inventor
Kurzschluß zu beseitigen, indem das Kabel an der Fehlerstelle geöffnet und die Überwachungseinrichtung durch eine neue ersetzt wird. Abgesehen davon, daß sich die Erfindung nicht mit diesem Problem befaßt, wäre aber auch die Anwendung der bekannten Maßnahme zeitraubend und kostspielig.Eliminate the short circuit by opening the cable at the point of failure and the monitoring device is replaced by a new one. Apart from the fact that the invention does not deal with this problem, however, the application of the known measure would also be time-consuming and costly.
Für den praktischen Betrieb einer Kabelanlage ist also das vorerwähnte Meldesystem für das Auftreten von Isolationsfehlern unzweckmäßig, weil jede Überschreitung der kritischen Temperatur eine Zerstörung des Meldesystems an der Fehlerstelle bewirkt. Das Ausbauen undErneuern der Überwachungseinrichtung bedingt ferner eine vollständige Abschaltung der Kabelanlage und damit eine Betriebsunterbrechung. Die Verwendung eines Überwachungssystems der vorerwähnten bekannten Art reicht nun aber keineswegs aus, um beispielsweise in Kraftwerkbetrieben mit einer großen Zusammenballung von Energiekabeln die Überwachung der zulässigen Kabeltemperatur durchzuführen. Längs des Weges des Kabels in Kanälen, Schalträumen usw. sind die Verhältnisse der Wärmeabführung meist so unterschiedlich und so schwer erfaßbar, daß eine Angabe der zulässigen Strombelastung nur mit großer Unsicherheit möglich ist. Es muß daher aus Sicherheitsgründen die Belastung des Kal>els fast immer kleiner gewählt werden, als es eigentlich erforderlich ist. Infolgedessen, können derartige Energiekabel in ihrer Leistungsfähigkeit nicht voll ausgenutzt werden.For the practical operation of a cable system, the afore-mentioned reporting system is necessary for the occurrence Insulation faults are inexpedient because every exceeding of the critical temperature leads to destruction of the reporting system at the point of failure. The removal and renewal of the monitoring device also requires a complete shutdown of the cable system and thus an interruption of operations. However, the use of a monitoring system of the aforementioned known type is by no means sufficient from, for example, in power plants with a large concentration of energy cables the Monitor the permissible cable temperature. Along the path of the cable in ducts, Switch rooms, etc., the heat dissipation ratios are usually so different and so difficult detectable that an indication of the permissible current load is only possible with great uncertainty. It therefore, for safety reasons, the load on the cal> els must almost always be chosen to be smaller than it is actually required. As a result, these types of power cables cannot perform well be fully exploited.
Zur Messung der Temperatur in Kabeln ist auch schon VOn Thermoelementen Gebrauch gemacht wor-Thermocouples have already been used to measure the temperature in cables.
809 6OO/353809 600/353
Claims (2)
Deutsche Patentschrift Nr. 624 998;
schweizerische Patentschrift Nr. 150 426;
USA.-Patentschriften Nr. 1152 932, 2 495 867. 581 213;Considered publications:
German Patent No. 624 998;
Swiss Patent No. 150 426;
U.S. Patent Nos. 1152,932, 2,495,867,581,213;
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES37610A DE1038140B (en) | 1954-02-12 | 1954-02-12 | Electric cable, in particular power cable, with a device for monitoring its operating temperature |
GB420355A GB764657A (en) | 1954-02-12 | 1955-02-11 | Improvements in or relating to electric cables |
FR1119076D FR1119076A (en) | 1954-02-12 | 1955-02-12 | Electric cable with temperature monitoring |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES37610A DE1038140B (en) | 1954-02-12 | 1954-02-12 | Electric cable, in particular power cable, with a device for monitoring its operating temperature |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1038140B true DE1038140B (en) | 1958-09-04 |
Family
ID=7482629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES37610A Pending DE1038140B (en) | 1954-02-12 | 1954-02-12 | Electric cable, in particular power cable, with a device for monitoring its operating temperature |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1038140B (en) |
FR (1) | FR1119076A (en) |
GB (1) | GB764657A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008030730A1 (en) | 2008-06-30 | 2009-12-31 | Universität Kassel | Method and device for measuring the temperature in a line or a bundle of cables and equipped with such a device vehicle |
WO2015091552A1 (en) | 2013-12-20 | 2015-06-25 | Leoni Kabel Holding Gmbh | Measuring arrangement and temperature-measuring method, and sensor cable for such a measuring arrangement |
US11041899B2 (en) | 2016-11-11 | 2021-06-22 | Leoni Kabel Gmbh | Method and measuring assembly for monitoring a line |
EP3916413A1 (en) | 2020-05-26 | 2021-12-01 | Lapp Engineering AG | Device and method for line and cable diagnosis |
DE102021000284A1 (en) | 2021-01-20 | 2022-07-21 | Lapp Engineering Ag | System for monitoring a feed line of an electrical machine fed from a frequency converter |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4707686A (en) * | 1986-04-03 | 1987-11-17 | General Electric Company | Over temperature sensing system for power cables |
DE102004013805A1 (en) * | 2004-03-20 | 2005-10-06 | Hans Schneider | Arrangement for detecting locally occurring excess temperatures |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1152932A (en) * | 1910-08-19 | 1915-09-07 | J a riggs | Automatic fire-alarm. |
CH150426A (en) * | 1929-11-06 | 1931-10-31 | Siemens Ag | Device for temperature measurement on cables. |
DE624998C (en) * | 1931-06-23 | 1936-02-01 | Max Weiset Dr Ing | Power cable with a device for displaying insulation faults and the location of the fault |
US2495867A (en) * | 1948-01-14 | 1950-01-31 | Petcar Res Corp | Method of manufacturing fire detector and like elements |
US2581213A (en) * | 1949-12-15 | 1952-01-01 | Gen Electric | Temperature responsive signaling and locating system |
-
1954
- 1954-02-12 DE DES37610A patent/DE1038140B/en active Pending
-
1955
- 1955-02-11 GB GB420355A patent/GB764657A/en not_active Expired
- 1955-02-12 FR FR1119076D patent/FR1119076A/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1152932A (en) * | 1910-08-19 | 1915-09-07 | J a riggs | Automatic fire-alarm. |
CH150426A (en) * | 1929-11-06 | 1931-10-31 | Siemens Ag | Device for temperature measurement on cables. |
DE624998C (en) * | 1931-06-23 | 1936-02-01 | Max Weiset Dr Ing | Power cable with a device for displaying insulation faults and the location of the fault |
US2495867A (en) * | 1948-01-14 | 1950-01-31 | Petcar Res Corp | Method of manufacturing fire detector and like elements |
US2581213A (en) * | 1949-12-15 | 1952-01-01 | Gen Electric | Temperature responsive signaling and locating system |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008030730A1 (en) | 2008-06-30 | 2009-12-31 | Universität Kassel | Method and device for measuring the temperature in a line or a bundle of cables and equipped with such a device vehicle |
DE102008030730B4 (en) * | 2008-06-30 | 2013-11-14 | Universität Kassel | Method and device for measuring the temperature in a line or a bundle of cables and equipped with such a device vehicle |
WO2015091552A1 (en) | 2013-12-20 | 2015-06-25 | Leoni Kabel Holding Gmbh | Measuring arrangement and temperature-measuring method, and sensor cable for such a measuring arrangement |
DE102013227051A1 (en) * | 2013-12-20 | 2015-06-25 | Leoni Kabel Holding Gmbh | Measuring arrangement and method for temperature measurement and sensor cable for such a measuring arrangement |
DE102013227051B4 (en) | 2013-12-20 | 2017-03-30 | Leoni Kabel Holding Gmbh | Measuring arrangement and method for temperature measurement and sensor cable for such a measuring arrangement |
US10488273B2 (en) | 2013-12-20 | 2019-11-26 | Leoni Kabel Holding Gmbh | Measuring arrangement and temperature-measuring method, and sensor cable for such a measuring arrangement |
US11041899B2 (en) | 2016-11-11 | 2021-06-22 | Leoni Kabel Gmbh | Method and measuring assembly for monitoring a line |
EP3916413A1 (en) | 2020-05-26 | 2021-12-01 | Lapp Engineering AG | Device and method for line and cable diagnosis |
DE102020003143A1 (en) | 2020-05-26 | 2021-12-02 | Lapp Engineering Ag | Device and method for line and cable diagnosis |
DE102020003143B4 (en) | 2020-05-26 | 2021-12-09 | Lapp Engineering Ag | Device and method for line and cable diagnosis |
DE102021000284A1 (en) | 2021-01-20 | 2022-07-21 | Lapp Engineering Ag | System for monitoring a feed line of an electrical machine fed from a frequency converter |
WO2022157053A1 (en) | 2021-01-20 | 2022-07-28 | Lapp Engineering Ag | System for monitoring a feed line of an electric machine which is fed by a frequency converter |
DE102021000284B4 (en) | 2021-01-20 | 2023-10-26 | Lapp Engineering Ag | System for monitoring a feed line of an electrical machine powered by a frequency converter |
Also Published As
Publication number | Publication date |
---|---|
FR1119076A (en) | 1956-06-14 |
GB764657A (en) | 1956-12-28 |
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