DE754140C - Device for detecting pendulum phenomena in electrical networks - Google Patents

Device for detecting pendulum phenomena in electrical networks

Info

Publication number
DE754140C
DE754140C DEL105499D DEL0105499D DE754140C DE 754140 C DE754140 C DE 754140C DE L105499 D DEL105499 D DE L105499D DE L0105499 D DEL0105499 D DE L0105499D DE 754140 C DE754140 C DE 754140C
Authority
DE
Germany
Prior art keywords
electrical networks
current
phenomena
overcurrent
network
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
DEL105499D
Other languages
German (de)
Inventor
Heinz Gutmann
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 DEL105499D priority Critical patent/DE754140C/en
Application granted granted Critical
Publication of DE754140C publication Critical patent/DE754140C/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
    • H02H3/48—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 loss of synchronism

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Description

Einrichtung zum, Erfassen von Pendelerscheinungen in elektrischen Netzen Das Patent 681 zo7 betrifft eine Einrichtung, -die bei Pendelerscheinungen in elektrischen Netzen ansprieht und beispielsweise dazu .dienen kann, solche Erscheinungen anzuzeigen oder in Abhängigkeit davon eine Blockierung von Schutzeinrichtungen hzw. ein Auftrennen von Netzteilen herbeizuführen. Dabei ist vorgesehen, das Ansprechorgan von, ,dem gleichzeitigen Auftreten eines Überstromes und einer kapazitiven Blindleistung abhängig zu machen. Ein gleichzeitiges Auftreten von Überstrom und .kapazitiver Blindtestung isst nun .aber nicht nur bei Berndelerscheinungen möglich, sondern kann sich insbesondere bei großen Netzen oder Netzverhänden unter Umständen auch .im Erdschlußfall ergeben, indem ;der kapazitäve Erdschlüßstrom Übers.tromwerte annimmt. Das hat dann eine fehlerhafte Anzeige bzw. -eine fehlerhafte Relaisbetätigung zur Folge.Device for detecting pendulum phenomena in electrical Networks The patent 681 zo7 relates to a device that works when there is a pendulum phenomenon in electrical networks and can serve, for example, such phenomena display or, depending on this, a blocking of protective devices hzw. to cause a disconnection of the power supply units. It is provided that the response body of,, the simultaneous occurrence of an overcurrent and a capacitive reactive power to make dependent. A simultaneous occurrence of overcurrent and .capacitive Blind testing now eats, but not only possible with Berndel symptoms, but can also under certain circumstances, especially in the case of large networks or network negotiation .in the event of an earth fault by; the capacitive earth fault current overcurrent values accepts. This then has a faulty display or faulty relay actuation result.

Um diesie Söhwierigkeit zu beheben, ist für eine von dem gleichzeitigen Auftreten eines Überstromes und ,eines kapazitiven Stromes abhängige Netzauftrenneinrichtung bereits vorgeschlagen worden, ,die Ausbildung so.. zu treffen, daß eine Betätigung nur dann .erfolgt, wenn .der kapazitive Strom bei gleichzeitigem Überschreiten .der Nennstromstärke durch den Gesamtstrom die Ladestromstärke der Leitung erheblich übersteigt. Die Erfindung zeigt demgegenüb,er .einen neuen und dabei sehr einfachen Weg, um für den Erdschlußfall, auch wenn gleichzeitig ein Überstrom und eine kapazitive Blindleistung auftritt, ein Ansprechen .der A.nz.eige- und. Auslöseeinrichturng nach dem Hauptpatent zu vermeiden. Zu diesem Zweck wird erfindungsgemäß diese Einrichtung zusätzlich in Abhängigkeit von dem im Erdschlußfall auftretenden Unsymmetriestrom des Netzes derart gesteuert, .daß ihr Arbeiten gesperrt wird, wenn der Unsymmetries.tram größer ist als der kleinstmögliche Erdschlußstrom des zu überwachenden Netzes. Zweckmäßig wird dafür das Unsymmetniestromrelais so eingestellt, d'aß sein Ansprechwert knapp unterhalb des Wertes des kleinstmöglichen Erdschlußstromes liegt. -To remedy this annoyance is for one of the simultaneous Appear an overcurrent and a capacitive current dependent Netzauftrenneinrichtung has already been proposed to meet the training so .. that actuation only. takes place when. the capacitive current with simultaneous Exceeding .the nominal amperage through the total current the charging amperage of the Line considerably exceeds. In contrast, the invention shows that he is new and very simple way to avoid earth faults, even if there is an overcurrent at the same time and a capacitive reactive power occurs, a response of the A.nz. and. To avoid tripping device according to the main patent. To this end, according to the invention this facility also depending on the event that occurs in the event of an earth fault Unbalance current of the network controlled in such a way. That your work is blocked if der Asymmetries.tram is greater than the smallest possible earth fault current of the to be monitored Network. For this purpose, the unbalance current relay is appropriately set in such a way that it is Response value is just below the value of the smallest possible earth fault current. -

Claims (1)

PATENTANSPRUCH: Einrichtung zum Erfassen von Pendelerscheinungen in elektrischen Netzen, .deren Ansprechorgan von dem gleichzeitigen Auftreten eines Überstromes und einer kapazitiven Blindleistung abhängig ist, nach Patent 681 107, gekennzeichnetdurch eine vom Unsymmetriestrom des Netzes beeinfiuZte Relaiseinrichtung, .die ,das Arbeiten der Einrichtung sperrt, wenn der Unsymrn@etriestrom .größer ist als der kleinstmögliche Erdschluß@strom des zu überwachenden Netzes. PATENT CLAIM: Device for detecting pendulum phenomena in electrical networks, whose response device is dependent on the simultaneous occurrence of an overcurrent and a capacitive reactive power, according to Patent 681 107, characterized by a relay device influenced by the unbalance current of the network, which blocks the device from working, if the asymmetric current is greater than the smallest possible earth fault current of the network to be monitored.
DEL105499D 1941-09-27 1941-09-27 Device for detecting pendulum phenomena in electrical networks Expired DE754140C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL105499D DE754140C (en) 1941-09-27 1941-09-27 Device for detecting pendulum phenomena in electrical networks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL105499D DE754140C (en) 1941-09-27 1941-09-27 Device for detecting pendulum phenomena in electrical networks

Publications (1)

Publication Number Publication Date
DE754140C true DE754140C (en) 1955-02-07

Family

ID=7290203

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL105499D Expired DE754140C (en) 1941-09-27 1941-09-27 Device for detecting pendulum phenomena in electrical networks

Country Status (1)

Country Link
DE (1) DE754140C (en)

Similar Documents

Publication Publication Date Title
DE2530717A1 (en) METHOD AND DEVICE FOR DISCONNECTING AN ELECTRICAL TRANSMISSION LINE IN THE EVENT OF OVERLOAD
DE754140C (en) Device for detecting pendulum phenomena in electrical networks
DE2653453A1 (en) Faulty current circuit for protective circuit breaker - has rectifier bridge producing fault-indicating signal to release auxiliary voltage via rectifier
DE2025120A1 (en)
DE667645C (en) Earth fault protection device with blocking in the event of a double earth fault
DE836379C (en) Protective circuit against dangerous contact voltages in the event of an earth conductor break in electrical systems
DE492765C (en) Device for the automatic earthing of AC lines in the event of overcurrent
DE423169C (en) Arrangement for switching off lines, transformers, etc. Like. In electrical distribution systems with overcurrent
DE734516C (en) Earth fault protection device for the DC exciter circuit of runners of electrical machines
DE681014C (en) Protection device for direct current generators
DE897584C (en) Time selective protection device
DE820463C (en) Circuit arrangement for protecting electrical lines against overload, especially in telecommunications systems
DE852258C (en) Arrangement for displaying damage to antenna systems
DE844334C (en) Switching method for earth fault compensated three-phase networks
DE624091C (en) Protective device for three-phase networks equipped with earth fault extinguishers, which are equipped with wattmetric earth fault relays that are dependent on the earth fault active power
DE681107C (en) Device that responds when pendulum phenomena occur in electrical networks
DE739503C (en) Circuit-breakers in series with a fuse
DE571463C (en) Earth fault protection for the armature winding of DC machines and single armature converters
AT224191B (en) Converter system with semiconductor valves
DE590416C (en) Selective protection circuit against earth faults for meshed networks or against frame faults for electrical generators
DE630534C (en) Overvoltage protection with glow lamp and a relay
DE402108C (en) Device for protecting electrical systems against overvoltages
DE557551C (en) Protective circuit for the compulsory retention of the voltage distribution to earth along the neutral conductor in low-voltage networks
DE456366C (en) Switching arrangement for voltage-dependent overcurrent protection
DE739247C (en) Arrangement for the elimination of arcing faults