DE398537C - Circuit arrangement of the overcurrent protection of lines connected in parallel by means of one or more relays built in the manner of a water relay - Google Patents

Circuit arrangement of the overcurrent protection of lines connected in parallel by means of one or more relays built in the manner of a water relay

Info

Publication number
DE398537C
DE398537C DEA39875D DEA0039875D DE398537C DE 398537 C DE398537 C DE 398537C DE A39875 D DEA39875 D DE A39875D DE A0039875 D DEA0039875 D DE A0039875D DE 398537 C DE398537 C DE 398537C
Authority
DE
Germany
Prior art keywords
parallel
overcurrent protection
circuit arrangement
manner
lines connected
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
DEA39875D
Other languages
German (de)
Inventor
Josef Biermanns
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.)
AEG AG
Original Assignee
AEG 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 AEG AG filed Critical AEG AG
Priority to DEA39875D priority Critical patent/DE398537C/en
Application granted granted Critical
Publication of DE398537C publication Critical patent/DE398537C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/267—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for parallel lines and wires

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Description

Schaltungsanordnung des Überstromschutzes parallel geschalteter Leitungen mittels eines oder mehrerer nach Art eines Wattrelais gebauten Relais. Zusatz zum Patent 349753. Durch das Patent 349753 ist eine Schutzeinrichtung geschützt, die gekennzeichnet ist durch Wattrelais, die von der Summe und der Differenz der Ströme der zu schützenden parallelen Leitungen betätigt werden. Die Relais sind in Ruhe, wenn entweder die Summe oder die Differenz der Ströme gleich Null ist. Im normalen Betrieb führen die beiden parallelen Leitungen gleiche Ströme, d. h. ihre Differenz ist gleich Null. Daß das Relais dann nicht anspricht, entspricht den an den Schutz gestellten Anforderungen. Es ist aber auch der Fall denkbar, daß die Summe der beiden Ströme-gleich Null wird. Bei einem Kurzschluß auf der einen Leitung nämlich fließt der Fehlerstelle über beide Leitungen ein Fehlerstrom zu, der an dem von der Stromquelle entfernt gelegenen Ende der beiden parallel geschalteten Leitungen gleiche Größe, aber verschiedenes Vorzeichen hat. Daß das Relais in diesem Falle nicht anspricht, ist unerwünscht.Circuit arrangement of the overcurrent protection of lines connected in parallel by means of one or more relays built in the manner of a water relay. Addition to Patent 349753. Patent 349753 protects a protective device which is characterized by Wattrelais, the sum and difference of the currents of the parallel lines to be protected are operated. The relays are at rest when either the sum or the difference of the currents is zero. In normal In operation, the two parallel lines carry the same currents, i. H. their difference is zero. The fact that the relay does not respond then corresponds to that of the protection requirements. But it is also conceivable that the sum of the two Currents-becomes zero. In the event of a short circuit on one line, it flows a fault current is applied to the fault location via both lines, which is transferred to that of the power source distant end of the two lines connected in parallel are of the same size, but has a different sign. That the relay does not respond in this case, is undesirable.

Gegenstand der vorliegenden Erfindung ist eine Anordnung, die diesen Übelstand dadurch beseitigt, daß diejenigen Teile des Relais, auf die der Summenstrom wirkt, mit einer Zusatzwicklung -versehen sind, die an der Spannung zwischen zwei Phasen liegt und deren Kraftfluß durch bekannte Maßnahmen (Drosselspule oder Ohmsche Widerstände) eine geeignete Phasenstellung erhält. Diese Wicklung unterstützt die andere und erzeugt ein Drehmoment in dem Relais auch in den Fällen, in denen der Summenstrom verschwindet.The present invention is an arrangement that this Defect eliminated by the fact that those parts of the relay to which the total current acts, are provided with an additional winding, which is connected to the voltage between two Phases and their power flow through known measures (choke coil or ohmic Resistors) is given a suitable phase position. This winding supports the others and creates a torque in the relay even in those cases where the Total current disappears.

Claims (2)

PATENTANSPRÜCHE: i. Schaltungsanordnung des Überstromschutzes parallel geschalteter Leitungen und von Ringleitungen mittels eines oder mehrerer nach Art eines Wattrelais gebauter Relais nach Patent 349753 dadurch gekennzeichnet, daß die von der Summe der Ströme beeinflußten Relaisteile eine von der Spannung zwischen zwei Phasen erregte Zusatzwicklung erhalten. PATENT CLAIMS: i. Circuit arrangement of the overcurrent protection in parallel switched lines and ring lines by means of one or more according to Art a Wattrelais built relay according to patent 349753, characterized in that the relay parts influenced by the sum of the currents one by the voltage between two phases excited additional winding received. 2. Anordnung nach Anspruch i, dadurch gekennzeichnet, daß der Zusatzfluß durch an sich bekannte Vorrichtungen (z. B: parallel oder in Serie mit der Spannungswicklung liegende Ohmsche oder induktive Widerstände) die gewünschte Phasenstellung erhält.2. Arrangement according to claim i, characterized characterized in that the additional flow by means known per se (z. B: parallel or ohmic or inductive resistances in series with the voltage winding) receives the desired phase position.
DEA39875D 1923-05-03 1923-05-03 Circuit arrangement of the overcurrent protection of lines connected in parallel by means of one or more relays built in the manner of a water relay Expired DE398537C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA39875D DE398537C (en) 1923-05-03 1923-05-03 Circuit arrangement of the overcurrent protection of lines connected in parallel by means of one or more relays built in the manner of a water relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA39875D DE398537C (en) 1923-05-03 1923-05-03 Circuit arrangement of the overcurrent protection of lines connected in parallel by means of one or more relays built in the manner of a water relay

Publications (1)

Publication Number Publication Date
DE398537C true DE398537C (en) 1924-07-11

Family

ID=6931626

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA39875D Expired DE398537C (en) 1923-05-03 1923-05-03 Circuit arrangement of the overcurrent protection of lines connected in parallel by means of one or more relays built in the manner of a water relay

Country Status (1)

Country Link
DE (1) DE398537C (en)

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