DE851377C - Reverse current automat - Google Patents

Reverse current automat

Info

Publication number
DE851377C
DE851377C DEA1541A DEA0001541A DE851377C DE 851377 C DE851377 C DE 851377C DE A1541 A DEA1541 A DE A1541A DE A0001541 A DEA0001541 A DE A0001541A DE 851377 C DE851377 C DE 851377C
Authority
DE
Germany
Prior art keywords
current
automat
reverse current
voltage
winding
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
DEA1541A
Other languages
German (de)
Inventor
Ludwig Dipl-Ing Herrmann
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.)
Accumulatoren Fabrik AG
Original Assignee
Accumulatoren Fabrik 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 Accumulatoren Fabrik AG filed Critical Accumulatoren Fabrik AG
Priority to DEA1541A priority Critical patent/DE851377C/en
Application granted granted Critical
Publication of DE851377C publication Critical patent/DE851377C/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
    • H02H3/18—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 reversal of direct current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/08—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by reversal of dc

Landscapes

  • Control Of Eletrric Generators (AREA)

Description

Gleichstromdynamos, welche von einem Drehstrom- oder Wechsel-strommotor angetrieben werden, können bei Netzausfall durch Rückstrom aus Batterien oder Gleichstrommaschinen umgepolt werden. Das Zurückmagnetisieren ist umständlich und erfordert nicht unwesentlichen Arbeitsaufwand. Es ist bekannt, zum Schutze gegen Rückstrom Selbstschalter bzw. Relais vorzusehen, deren Magnet durch eine Spannungs- und eine Stromwicklung erregt wird. Bei normaler Stromrichtung addieren sich die Wirkungen der ,beiden Wicklungen, bei einem bestimmten Rückstrom heben sie sich auf, so daß durch Federkraft die Kontakte geöffnet werden und -der Rückstrom unterbrochen wird. Da hier ein Rückstrom in gewisser Höhe vorhanden sein muB :und der Auslösemechanis;mus eine weitere Zeitverzögerung bedingt, ist bei kompoundierten Generatoren die Gefahr des Umpolens nicht restlos beseitigt. Ein Minimalstromschalter mit reiner Stromwicklung ergibt zwar früheres Abschalten, ermöglicht jedoch nicht die Entnahme geringer Stromstärken bzw. Einschalten im Leerlauf.DC dynamos, which are powered by a three-phase or alternating-current motor can be driven by reverse current from batteries or DC machines in the event of a power failure be reversed. The magnetization back is cumbersome and requires not insignificant Workload. It is known to use circuit breakers or circuit breakers to protect against reverse current. Provide relays whose magnet is excited by a voltage and a current winding will. With normal current direction, the effects of the two windings add up at a certain reverse current they cancel each other out, so that the contacts are opened by spring force opened and -the return current is interrupted. There is a reverse current here in a certain way Height must be present: and the release mechanism must have a further time delay conditionally, with compounded generators the risk of polarity reversal is not complete eliminated. A minimum current switch with a pure current winding results earlier Switch off, but does not allow drawing low currents or switching on at idle.

Die oben beschriebenen Nachteile werden bei dem Rückstromautomaten nach der Erfindung, welcher ebenfalls sowohl eine Strom- wie auch eine im gleichen Sinne arbeitende Spannungswicklung besitzt, dadurch vermieden, daB die Spannungswicklung unter Vorschaltung eines elektrischen Gleichrichters an die Spannung des Dreh-oder Wechselstromnetzes angeschlossen ist. j Ist der Drehstrommotor in Betrieb, wird die Spannungsspule erregt, so daß der Rückstromautomat auch bei leer laufendem Gleichstromdynamo eingeschaltet werden kann. Wird der Generator belastet, arbeitet die Stromwicklung zusätzlich zur,Spannungswicklung. Fällt das Drehstromnetz aus, so wird die Spannungswicklung stromlos, und der Rückstromautomat arbeitet als Minimalstromschalter, d. h. er schaltet ab, bevor der Gleichstrom bis auf Null abgesunken ist. Das Auftreten von Rückstrom wird so mit Sicherheit verhindert.The above-described disadvantages are in the reverse flow automat according to the invention, which is also both a current as well as one in the same Voltage winding that works sensibly, thereby avoiding the voltage winding with an electrical rectifier connected to the voltage of the rotary or AC mains is connected. j If the three-phase motor is in operation, the voltage coil is excited, so that the reverse current automaton even when the direct current dynamo is idling can be switched on. If the generator is loaded, the current winding works in addition to, voltage winding. If the three-phase network fails, the voltage winding will de-energized, and the reverse current automat works as a minimum current switch, i. H. he switches before the direct current has dropped to zero. The occurrence of reverse current is thus prevented with certainty.

Die Zeichnung zeigt ein Ausführungsbeispiel des Rückstromnautomaten nach der Erfindung. Wie ersichtlich, besitzt der Rückstromautomat 7, welcher mittels der Feder i i in der Ausschaltstellung gehalten wird, eine Gleichstromwicklung 8 sowie eine im gleichen Sinne arbeitende Spannungswicklung 9, welche unter Vorschaltung eines elektrischen Gleichrichters io an das Drehstromnetz angeschlossen ist.The drawing shows an embodiment of the reverse flow automat according to the invention. As can be seen, the reverse flow automat 7, which by means of the spring i i is held in the switched-off position, a direct current winding 8 as well as a voltage winding 9 working in the same sense, which is connected in series an electrical rectifier io is connected to the three-phase network.

Der Generator 3 mit der Feldwicklung 4 und einem dieser vorgeschalteten Regulierwiderstand 5 sowie der Hauptstrom- (Compound-) Wicklung 6 wird mittels des Drehstrommotors 2 angetrieben, der an ,das Drehstromnetz mittels des Schalters i angeschaltet wird.The generator 3 with the field winding 4 and one of these upstream Regulating resistor 5 and the main current (compound) winding 6 is by means of the Three-phase motor 2 driven, the three-phase network by means of the switch i is switched on.

Claims (1)

PATENTANSPRUCH: Rückstromautomat für Gleichstromanlagen, deren Stromerzeuger durch Drehstrom- oder Wechselstrommotoren angetrieben werden, mit in gleichem Sinne arbeitender Strom- und Spannungswicklung, dadurch :gekennzeichnet, daB die Spannungswicklung (9) unter Vorschaltung eines elektrischen Gleichrichters (io) an die Spannung des Dreh- oder Wechselstromnetzes angeschlossen ist. Angezogene Druckschriften: Deutsche Patentschriften Nr. 530 231, 576 i26; britische Patentschrift Nr. 125 646. PATENT CLAIM: Reverse current machine for direct current systems, the power generators of which are driven by three-phase or alternating current motors, with current and voltage winding working in the same sense, characterized in that the voltage winding (9) is connected to the voltage of the three-phase with an electrical rectifier (io) connected upstream. or AC mains. Cited publications: German patent specifications No. 530 231, 576 i26; British Patent No. 125 646.
DEA1541A 1950-04-29 1950-04-29 Reverse current automat Expired DE851377C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA1541A DE851377C (en) 1950-04-29 1950-04-29 Reverse current automat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA1541A DE851377C (en) 1950-04-29 1950-04-29 Reverse current automat

Publications (1)

Publication Number Publication Date
DE851377C true DE851377C (en) 1952-10-02

Family

ID=6919626

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA1541A Expired DE851377C (en) 1950-04-29 1950-04-29 Reverse current automat

Country Status (1)

Country Link
DE (1) DE851377C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009059839A1 (en) * 2009-12-21 2011-06-22 Eaton Industries GmbH, 53115 Device for use with e.g. electrical switching device for detecting reversal of current direction in photovoltaic strand, has magnetically polarized armature operatively connected with actuator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB125646A (en) * 1915-10-07 1919-05-01 British Westinghouse Electric Improvements in Means for Interrupting Electric Circuits containing Vapour Converters.
DE530231C (en) * 1928-02-14 1931-07-24 Aeg Device for the protection of mercury vapor rectifiers with a reverse current protection device located on the secondary side of the rectifier transformer, which is influenced by both the anode and the cathode currents
DE576126C (en) * 1931-05-21 1933-05-08 Aeg Device for supplying direct current motors, which sometimes run as generators, from an alternating current network by means of grid-controlled discharge vessels

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB125646A (en) * 1915-10-07 1919-05-01 British Westinghouse Electric Improvements in Means for Interrupting Electric Circuits containing Vapour Converters.
DE530231C (en) * 1928-02-14 1931-07-24 Aeg Device for the protection of mercury vapor rectifiers with a reverse current protection device located on the secondary side of the rectifier transformer, which is influenced by both the anode and the cathode currents
DE576126C (en) * 1931-05-21 1933-05-08 Aeg Device for supplying direct current motors, which sometimes run as generators, from an alternating current network by means of grid-controlled discharge vessels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009059839A1 (en) * 2009-12-21 2011-06-22 Eaton Industries GmbH, 53115 Device for use with e.g. electrical switching device for detecting reversal of current direction in photovoltaic strand, has magnetically polarized armature operatively connected with actuator

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