DE911399C - Method for monitoring high-voltage cables that are not in operation - Google Patents

Method for monitoring high-voltage cables that are not in operation

Info

Publication number
DE911399C
DE911399C DES6237D DES0006237D DE911399C DE 911399 C DE911399 C DE 911399C DE S6237 D DES6237 D DE S6237D DE S0006237 D DES0006237 D DE S0006237D DE 911399 C DE911399 C DE 911399C
Authority
DE
Germany
Prior art keywords
voltage
cables
voltage cables
monitoring high
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.)
Expired
Application number
DES6237D
Other languages
German (de)
Inventor
Dipl-Ing Otto Gasser
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
Priority to DES6237D priority Critical patent/DE911399C/en
Application granted granted Critical
Publication of DE911399C publication Critical patent/DE911399C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)

Description

Verfahren zur Uberwachung von nicht in Betrieb befindlichen Hochspannungskabeln Es kommt häufig qvor, daß Hochspannungskabel längere Zeit nicht in Betrieb sind, sei es, daß die Kabel uulr Speisung nur zeitweilig benutzter Anlagen dienen oder daß sie sie als als Reserve für andere Kabel bestimmt sind. Es ist im solchen Fällen wichtig, diese Kabel zu überwachen, um rechtzeitig Isolationsfehler feststellen und beseitigen zu können, damit das Kabel, wenn es in Betrieb genommen werden soll, auch tatsächlich betriebsbereit ist. Eine von Zeit zu Zeit vorgenommene Messung des Isolationswidenstandes hat den Nachteil, daß ein Fehler gegebenenfalls enst lange nach seinem Auftreten festgestellt wird, slo daß er Zeit hat, sich auszubreiten, wodurch die erforderlichen Reparaturarbeiten vergrößert wenden.Method for monitoring high-voltage cables that are not in service It it often happens that high-voltage cables are not in operation for a long time it is that the cables and supply only temporarily used systems or that they are intended as a reserve for other cables. It is in such cases It is important to monitor these cables in order to identify insulation faults in good time and to be able to remove it, so that the cable, when it is to be put into operation, is actually ready for use. A measurement taken from time to time the insulation resistance has the disadvantage that an error may occur long after its appearance it is found that it has time to spread out, thereby turning the necessary repair work enlarged.

Gemäß der Erfindlunlg wird daher harn solche Kabel dauernd eine hohe Gleichspannung, die unter der Durchschlagspannung des Kabels liegt, angelegt und der Isolationsstrom gemessen. Die Überschreitung des normalen Isolationsstromes, die an Anzeigeinstrumenten festgestellt werden kann, deutet dann unmittelbar auf das Auftreten von Fehlern hin, die also ganz kunzzeitig nach ihrem Entstehen festgestellt und beseitigt werden können. Gegebe- nenfalls kann auch eine Alarmvorrichtung vorgesehen werden, die beim Ansteigen des Isolationsstromes bis auf einen bestimmten Wert anspricht. According to the invention, such cables will therefore always have a high level DC voltage, which is below the breakdown voltage of the cable, is applied and the insulation current measured. Exceeding the normal insulation current, which can be determined on display instruments then indicates immediately the occurrence of errors, which are detected very shortly after their occurrence and can be eliminated. Given if necessary, an alarm device can also be used are provided, which when the insulation current increases up to a certain Value appeals.

Durch die Wahl hochgespannten Gleichstromes für die Zwecke der Erfindung, wobei die Spanung etwas unterhalb der Durchschlagspannung des zu überwachenden Kabels gewält wird, wird mit Sicherheit erreicht, daß auch schleihende Fehler, wie z. B. langsames Eindringen von Feuchtigkeit durch eine kleine Beschädigung des Mantels, mit Sicherheit in kürzester Frist erkannt werden, was bei Wahl von Niederspannung für die Überwachungszwecke nicht der Fall wäre. Die Wahl von Gleichspannung für die Zwecke der Erfindung hat den Vorteil, daß hierbei praktisch kein Leistungsverbrauch eintritt, während bei hochgespanntem Wechselstrom stets mit dielektritschen Verlusten und einem Blindleistungsverbrauch gerechnet werden müßte, der gegebenenfalls auch sehr große Werte annehmen. könnte. By choosing high voltage direct current for the purposes of the invention, where the voltage is slightly below the breakdown voltage of the cable to be monitored is chosen, it is achieved with certainty that even looping errors, such as. B. slow penetration of moisture through a small damage to the jacket, can be recognized with certainty in the shortest possible time, which is the case with the choice of low voltage would not be the case for monitoring purposes. The choice of DC voltage for the purpose of the invention has the advantage that there is practically no power consumption occurs, while with high voltage alternating current always with dielectric losses and a reactive power consumption would have to be expected, which may also take on very great values. could.

Claims (2)

PATENTANSPRÜCHE: 1. Verfahren zur Überwachung von nicht in Betrieb befindlichen Hochspannungskabeln, dadurch gekennzeichnet, daß an das Kabel dauernd eine Gleichspannung, die unter der Durchschlagspannung des Kabels liegt, angelegt und der Isolationsstrom gemessen wird. PATENT CLAIMS: 1. Procedure for monitoring out of order located high voltage cables, characterized in that on the cable permanently a DC voltage that is below the breakdown voltage of the cable is applied and the insulation current is measured. 2. Einrichtung zur Durchführung des Verfahrens nach Anspruch I, gekennzeichnet durch eine Alarmvorrichtung, die bei Überschreiten eines bestimmten Stromwertes anspricht. 2. Device for performing the method according to claim I, characterized by an alarm device, which when a certain current value is exceeded appeals to.
DES6237D 1942-08-08 1942-08-08 Method for monitoring high-voltage cables that are not in operation Expired DE911399C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES6237D DE911399C (en) 1942-08-08 1942-08-08 Method for monitoring high-voltage cables that are not in operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES6237D DE911399C (en) 1942-08-08 1942-08-08 Method for monitoring high-voltage cables that are not in operation

Publications (1)

Publication Number Publication Date
DE911399C true DE911399C (en) 1954-05-13

Family

ID=7471878

Family Applications (1)

Application Number Title Priority Date Filing Date
DES6237D Expired DE911399C (en) 1942-08-08 1942-08-08 Method for monitoring high-voltage cables that are not in operation

Country Status (1)

Country Link
DE (1) DE911399C (en)

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