DE514347C - Device for monitoring AC networks - Google Patents

Device for monitoring AC networks

Info

Publication number
DE514347C
DE514347C DE1930514347D DE514347DD DE514347C DE 514347 C DE514347 C DE 514347C DE 1930514347 D DE1930514347 D DE 1930514347D DE 514347D D DE514347D D DE 514347DD DE 514347 C DE514347 C DE 514347C
Authority
DE
Germany
Prior art keywords
networks
monitoring
overcurrent
neutral conductor
short
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
DE1930514347D
Other languages
German (de)
Inventor
Dipl-Ing Paul Wittich
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 Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
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 Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Application granted granted Critical
Publication of DE514347C publication Critical patent/DE514347C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current

Landscapes

  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Description

Einrichtung zur Überwachung von Wechselstromnetzen Zusatz zum Patent 511474 In dem Hauptpatent wird vorgeschlagen, in Wechselstrom-Niederspannungsverteilungsnetzen durch in den Phasen liegende Überstromzähler, die nur bei gleichzeitig mit dem Überstrom erfolgender Spannungsabsenkung ansprechen, die Betriebsfähigkeit des Netzes zu überwachen.Device for monitoring alternating current networks. Patent addition 511474 In the main patent it is proposed in alternating current low voltage distribution networks by overcurrent meters in the phases, which only work at the same time as the overcurrent respond when the voltage drop occurs, monitor the operability of the network.

In Netzen, in denen Einphasenkabel mit blanken Nulleitern verlegt sind, läßt sich die Prüfvorrichtung nach dem Hauptpatent wesentlich vereinfachen. Erfindungsgemäß wird in solchen Netzen in den Nulleiter eine einfache Zählvorrichtung eingeschaltet.In networks in which single-phase cables with bare neutral conductors are laid are, the test device can be simplified significantly according to the main patent. According to the invention, a simple counting device is used in the neutral conductor in such networks switched on.

Der Erfindung liegt die Erkenntnis zugrunde, daß in Netzen mit Einphasenkabeln und blanken Nulleitern jeder Kurzschluß auch einen Kurzschluß in dem Nulleiter und damit einer. Überstrom im Nulleiter hervorruft. Da zur Beurteilung der Betriebsfähigkeit des Netzes nur die Zahl der Kurzschlüsse im Netz und nicht die Zahl der Kurzschlüsse bei den Abnehmern von Bedeutung ist und da ferner der Nulleiter nur bei Kurzschlüssen Überstrom führen kann, genügt es den Überstrom im Nulleiter zu überwachen. Man kommt dabei mit einer einzigen Zählvorrichtung aus, während man in Netzen ohne blanke Nulleiter mit Dreiphasenkabeln eine Kurzschlußprüfvorrichtung nach dem Hauptpatent in jeder einzigen Phase benötigt.The invention is based on the knowledge that in networks with single-phase cables and bare neutral conductors, each short circuit also has a short circuit in the neutral conductor and so one. Causes overcurrent in the neutral conductor. As to assess the operability of the network only the number of short circuits in the network and not the number of short circuits is of importance to the customers and since furthermore the neutral conductor only occurs in the event of a short circuit Can lead to overcurrent, it is sufficient to monitor the overcurrent in the neutral conductor. One comes doing this with a single counting device, while in networks without bare Neutral conductor with three-phase cables a short-circuit testing device according to the main patent needed in every single phase.

Die Erfindung gestattet damit nicht nur eine Vereinfachung des Kurzschlußzählers durch Wegfall der spannungsabhängigen Verriegelung, sondern eine Verringerung der Zahl der Kurzschlußzähler.The invention thus not only allows the short-circuit counter to be simplified by eliminating the voltage-dependent locking, but a reduction in the Number of short-circuit counters.

Claims (1)

PATENTANSPRUCH: Einrichtung zurÜberwachung vonWechselstromnetzen nach Patent 511474 bei der die im Netz auftretenden Kurzschlüsse gezählt werden, für Netze mit Einphasenkabeln und blankem Nulleiter, gekennzeichnet durch eine Vorrichtung, die die im Nulleiter eintretenden Betriebsfälle mit Überstrom zählt.PATENT CLAIM: Device for monitoring AC networks according to Patent 511474 in which the short circuits occurring in the network are counted for Networks with single-phase cables and bare neutral, characterized by a device, which counts the operating cases with overcurrent occurring in the neutral conductor.
DE1930514347D 1930-01-17 1930-01-17 Device for monitoring AC networks Expired DE514347C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE514347T 1930-01-17

Publications (1)

Publication Number Publication Date
DE514347C true DE514347C (en) 1930-12-13

Family

ID=6548653

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930514347D Expired DE514347C (en) 1930-01-17 1930-01-17 Device for monitoring AC networks

Country Status (1)

Country Link
DE (1) DE514347C (en)

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