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DE394548C - Selective relay to protect electrical lines - Google Patents

Selective relay to protect electrical lines

Info

Publication number
DE394548C
DE394548C DEA38896D DEA0038896D DE394548C DE 394548 C DE394548 C DE 394548C DE A38896 D DEA38896 D DE A38896D DE A0038896 D DEA0038896 D DE A0038896D DE 394548 C DE394548 C DE 394548C
Authority
DE
Germany
Prior art keywords
relay
electrical lines
current
protect electrical
selective relay
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
DEA38896D
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 DEA38896D priority Critical patent/DE394548C/en
Application granted granted Critical
Publication of DE394548C publication Critical patent/DE394548C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02H3/42—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 product of voltage and current

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Description

Selektivrelais zum Schutze elektrischer Leitungen. Zusatz zum Patent 390280. Bei Kurzschlüssen in Drehstromnetzen treten Phasenverschiebungen zwischen Strom und Spannung auf, die ihrer Größe und Richtung nach durch die Höhe und Phasenlage des Kurzschlußstromes und auch dadurch, ob der Kurzschluß einphasig oder dreiphasig ist, sehr stark beeinflußt werden. Den Wattrelais, wie sie zur Auswahl der abzuschaltenden Leitung in Abhängigkeit von der Stromrichtung bekannt sind, z. B. Ferrarisrelais, gibt man in ihren Strom- und Spannungsflüssen eine bestimmte Phasenverschiebung, so daß sie bei einem bestimmten Winkel zwischen Kurzschlußstrom und Spannung ein Maximum ihres Drehmoments in der einen oder anderen Richtung haben. So ist es, um zwei Grenzfälle zu erwähnen, möglich, sie so zu eichen, daß sie entweder auf die Wattkomponente oder auf die wattlose Komponente des Kurzschlußstromes am stärksten ansprechen.Selective relay for protecting electrical lines. Addition to the patent 390280. In the event of short circuits in three-phase systems, phase shifts occur between Current and voltage based on their size and direction by the height and phase position the short-circuit current and also whether the short-circuit is single-phase or three-phase is to be influenced very strongly. The Wattrelais as they are used to select the ones to be switched off Line are known depending on the current direction, z. B. Ferraris relay, give a certain phase shift in their current and voltage flows, so that they enter at a certain angle between short circuit current and voltage Have maximum of their torque in one direction or the other. So it is to To mention two borderline cases, it is possible to calibrate them in such a way that they either refer to the Watt component or the wattless component of the short-circuit current most strongly speak to.

Infolge der eingangs besprochenen, vorher nicht bestimmbaren Phasenverschiebung im Kurzschluß ist es aber möglich, daß unter ungünstigen Umständen das Drehmoment der Wattrelais so beeinflußt wird, daß es zu Fehlschaltungen kommt. Gegenstand der Erfindung ist die Auswahl einer solchen Phasenverschiebung der beiden Flüsse in dem Strom-und Spannungseisen des Wattrelais, daß die zu erwartenden Fehlschaltungen auf ein Mindestmaß verringert, ja sogar ganz unmöglich gemacht werden. Dieses Ziel wird dann erreicht, wenn mit Hilfe bekannter Mittel (Drosselspulen und Ohmscher Widerstände) die Innen- und Außenschaltung des Relais so getroffen wird, daß das größte Drehmoment an der Ferrarisscheibe des Wattrelais dann vorhanden ist, wenn der die Stromwicklung durchfließende Strom in Phase mit der am Relais anliegenden verketteten Spannung liegt oder, mit anderen Worten, wenn der Strom in der Spannungsspule der zugehörigen Spannung um go ° nacheilt.As a result of the previously discussed, previously undetermined phase shift in the short circuit, however, it is possible that, under unfavorable circumstances, the torque the Wattrelais is influenced in such a way that incorrect switching occurs. Subject of Invention is the selection of such a phase shift of the two flows in the current and voltage iron of the Wattrelais that the expected faulty switching reduced to a minimum, even made completely impossible. This goal is achieved when with the help of known means (choke coils and ohmic Resistors) the internal and external circuit of the relay is made so that the greatest torque on the Ferraris disk of the wattrelais is available when the current flowing through the current winding in phase with that applied to the relay line-to-line voltage or, in other words, when the current is in the voltage coil lags the associated voltage by go °.

Claims (1)

PATENTANSPRUCH: Selektivrelais zum Schutze elektrischer Leitungen nach Patent 3go28o, dadurch gekennzeichnet, daß das.größte Drehmoment des Wattrelais dann vorhanden ist, wenn der die Stromwicklune des Relais durchfließende Strom in Phase mit der am Relais anliegenden verketteten Spannung ist.PATENT CLAIM: Selective relay to protect electrical lines according to patent 3go28o, characterized in that the largest torque of the wading relay is present when the current flowing through the current winding of the relay is in Phase with the line-to-line voltage applied to the relay.
DEA38896D 1922-12-01 1922-12-01 Selective relay to protect electrical lines Expired DE394548C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA38896D DE394548C (en) 1922-12-01 1922-12-01 Selective relay to protect electrical lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA38896D DE394548C (en) 1922-12-01 1922-12-01 Selective relay to protect electrical lines

Publications (1)

Publication Number Publication Date
DE394548C true DE394548C (en) 1924-05-09

Family

ID=6931070

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA38896D Expired DE394548C (en) 1922-12-01 1922-12-01 Selective relay to protect electrical lines

Country Status (1)

Country Link
DE (1) DE394548C (en)

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