DE739503C - Circuit-breakers in series with a fuse - Google Patents

Circuit-breakers in series with a fuse

Info

Publication number
DE739503C
DE739503C DEL100606D DEL0100606D DE739503C DE 739503 C DE739503 C DE 739503C DE L100606 D DEL100606 D DE L100606D DE L0100606 D DEL0100606 D DE L0100606D DE 739503 C DE739503 C DE 739503C
Authority
DE
Germany
Prior art keywords
fuse
circuit
series
short
switch
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
DEL100606D
Other languages
German (de)
Inventor
Kuno Bauerschmidt
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 DEL100606D priority Critical patent/DE739503C/en
Application granted granted Critical
Publication of DE739503C publication Critical patent/DE739503C/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
    • H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/222—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 for distribution gear, e.g. bus-bar systems; for switching devices for switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses
    • H01H9/104—Adaptation for built-in fuses with interlocking mechanism between switch and fuse

Landscapes

  • Fuses (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Description

Mit einer Sicherung in Reihe liegender Leistüngstrennschalter Die Erfindung bezieht sich auf einen mit einer Sicherung in Reihe liegenden Leistungstrennschalter, der nach Unterbrechung der Sicherung beispielsweise durch deren Ansprechkennzeichen- selbsttätig ausgeschaltet wird.Power disconnectors in series with a fuse The invention relates to a circuit breaker connected in series with a fuse, which after the fuse has been interrupted, for example by its response indicator is switched off automatically.

Solche Anordnungen sind zum Schutz von Transformatoren und anderen Geräten gebräuchlich. Schalter und Sicherung sind dabei vorzugsweise zu einem einheitlichen Gerät vereinigt. Als Leistungstrennschalter wird z. B. ein Schalter mit Lichtbogenlöschung durch Gase und Dämpfe verwendet, die der Lichtbogen aus den Schaltraumwandungen frei macht.Such arrangements are for the protection of transformers and others Devices in use. Switch and fuse are preferably integrated into one Device united. As a circuit breaker z. B. a switch with arc quenching by gases and vapors used, which the arc from the switch room walls makes free.

Bei Auftreten eines Kurzschlußstromes schmilzt die Sicherung, wenn der Kurzschlußstrom nicht allzu hoch über dem Nennstrom der Sicherung liegt, erst nach mehreren Sekunden durch, Es kann nun vorkommen; daß jemand, der den auftretenden Kurzschluß sogleich erkennt, sofort den Schalter ausschalten will, um das zu schützende Gerät vor dem Kurzschlußstrom zu bewahren. Dies darf aber innerhalb der Zeit, die bis zum völligen Durchschmelzen der Sicherung vergeht, nicht geschehen. Denn der Schalter, der bei Kurzschluß normalerweise immer nach der Sicherung ausschalten soll, ist ja im allgemeinen nur für die Abschaltung mäßiger Stromstärken bemessen. Er würde also im Kurzschlußfall durch ein Abschalten vor dem Unterbrechen der Sicherung beschädigt werden.When a short-circuit current occurs, the fuse melts if the short-circuit current is not too high above the rated current of the fuse, first after several seconds through, it can now happen; that someone who is occurring Immediately recognizes short circuit, immediately wants to turn off the switch to protect the To protect the device from the short-circuit current. However, this may be done within the time that until the fuse completely blows, does not happen. Because the Switch that normally always switches off after the fuse in the event of a short circuit is generally only rated for switching off moderate currents. In the event of a short circuit, it would be switched off before the fuse was interrupted to be damaged.

Um ein vorzeitiges willkürliches Abschalten des Schalters bei Auftreten eines Kurzschlusses zu verhindern, sieht die Erfindung daher vor, daß der Schalter bei Auftreten eines Kurzschlusses bis zum endgültigen Unterbrechen der Sicherung gegen willkürliches Ausschalten gesperrt ist. Die Sperreinrichtung wird dabei zweckmäßig durch den Kurzschlußstrom selbst in Tätigkeit gesetzt.A premature arbitrary switching off of the switch if it occurs To prevent a short circuit, the invention therefore provides that the switch in the event of a short circuit up to the final interruption of the fuse is locked against arbitrary switching off. The locking device is expediently set into action by the short-circuit current itself.

Die Zeichnung veranschaulicht in schematischer Weise ein Ausführungsbeispiel der Erfindung.The drawing illustrates an exemplary embodiment in a schematic manner the invention.

Dem an das Netz i angeschlossenen elektrischen Gerät z, z. B. einem Transformator, ist die Schmelzsicherung 3 und der Leistungstrennschalter 4 vorgeschaltet. Der Leistungstrennschalter ist nur für die Abschaltung des höchst zulässigen Betriebsstromes bemessen, z. B. für 15o A. Die Nennstromstärke der Sicherung 3 ist demzufolge auch i 5o A. Tritt nun beispielsweise ein Kurzschlußstrom von 6oo A auf, so darf der Schalter 4 selbstverständlich nicht geöffnet werden, solange er von diesem Strom durchflossen wird. Bei den beispielsweise angegebenen Verhältnissen schmilzt nach vorliegenden Messungen bei bestimmten Anordnungen die Sicherung 3 etwa io Sek. nach dem Auftreten des Kurzschlußstromes durch. Während dieser io Sek. darf daher der Schalter 4 unter keinen Umständen geöffnet werden. Er wird aus diesem Grund während dieser Zeit gegen jedes willkürliche Öffnen gesperrt und kann dann z. B. nur durch das Abfallen der Ansprechkennzeichen der Sicherung geöffnet werden. Die Sperrvorrichtung selbst kann beliebig ausgebildet sein. Ihre Durchbildung wird sich nach dem jeweiligen Schalteraufbau richten und bereitet dem Fachmann keine Schwierigkeiten.The electrical device z connected to the network i, e.g. B. a Transformer, the fuse 3 and the circuit breaker 4 are connected upstream. The circuit breaker is only for switching off the maximum permissible operating current dimensioned, e.g. B. for 15o A. The current rating of fuse 3 is therefore also i 50 A. If, for example, a short-circuit current of 600 A occurs, the Switch 4 of course cannot be opened as long as it is on this current is traversed. At the ratios given for example, it melts again available measurements with certain arrangements the fuse 3 about 10 seconds after the occurrence of the short-circuit current. During this 10 second, the Switch 4 must not be opened under any circumstances. He will be while for this reason this time locked against any arbitrary opening and can then z. B. only through the dropping of the response indicator of the fuse can be opened. The locking device itself can be designed as desired. Your education will vary according to the respective Set up the switch assembly and present no difficulties for the person skilled in the art.

In der Zeichnung ist eine einpolige Anordnung- dargestellt. Die Erfindung bezieht sich selbstverständlich aber auch auf entsprechende mehrpolige Anordnungen.A single pole arrangement is shown in the drawing. The invention Of course, it also refers to corresponding multi-pole arrangements.

Claims (2)

PATENTANSPRÜCHE: i. Mit einer Sicherung in Reihe liegender Leistungstrennschalter, der nach Unterbrechen der Sicherung, beispielsweise durch deren Ansprechkennzeichen, selbsttätig ausgeschaltet wird, dadurch gekennzeichnet, daß der Schalter bei Auftreten eines Kurzschlusses bis zum endgültigen Unterbrechen der Sicherung gegen willkürliches Ausschalten gesperrt wird. PATENT CLAIMS: i. Circuit-breakers in series with a fuse, after the fuse has been interrupted, for example by its response indicator, is automatically switched off, characterized in that the switch occurs when a short circuit up to the final interruption of the fuse against arbitrary Switching off is locked. 2. Mit einer Sicherung in Reihe liegender Schalter nach Anspruch i, dadurch gekennzeichnet, daß die Sperreinrichtung durch den Kurzschlußstrom in Tätigkeit gesetzt wird. Zur Abgrenzung des Anmeldungsgegenstandes vom Stand der Technik sind im Erteilungsverfahren in Betracht gezogen worden: deutsche Patentschrift Nr. q.79 6o9, 545 97I österreichische Patentschrift Nr. 109936; französische - - 8oi 689; amerikanische - - 1684249; Elektrische Bahnen, Okt. 1925, S. 391-932. With a fuse in series switch according to claim i, characterized in that the locking device is put into action by the short-circuit current. To distinguish the subject of the application from the state of the art, the following were considered in the granting procedure: German patent specification No. q.79 609, 545 97I Austrian patent specification No. 109936; French - - 8oi 689; American - - 1 684249; Electric Railways, Oct. 1925, pp. 391-93
DEL100606D 1940-04-17 1940-04-17 Circuit-breakers in series with a fuse Expired DE739503C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL100606D DE739503C (en) 1940-04-17 1940-04-17 Circuit-breakers in series with a fuse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL100606D DE739503C (en) 1940-04-17 1940-04-17 Circuit-breakers in series with a fuse

Publications (1)

Publication Number Publication Date
DE739503C true DE739503C (en) 1943-09-28

Family

ID=7289393

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL100606D Expired DE739503C (en) 1940-04-17 1940-04-17 Circuit-breakers in series with a fuse

Country Status (1)

Country Link
DE (1) DE739503C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029912B (en) * 1955-07-21 1958-05-14 Calor Emag Elektrizitaets Ag Electrical switching device for direct or alternating current with overcurrent and short-circuit current protection

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT109936B (en) * 1927-04-27 1928-06-11 Aeg Union Elek Wien Device to protect switches and the like against overload.
US1684249A (en) * 1925-02-09 1928-09-11 Gen Electric Automatic circuit controller
DE479609C (en) * 1927-07-07 1929-07-19 Bbc Brown Boveri & Cie Electromagnetic self-opening switch with free release, especially for electric vehicle heating
DE545971C (en) * 1926-06-20 1932-03-08 Voigt & Haeffner Ag Arrangement for preventing the switching off of switches with lower power, which are preceded by a switch with higher power
FR801689A (en) * 1935-04-17 1936-08-13 Device for separating the contacts of a switch in the event of a fused circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684249A (en) * 1925-02-09 1928-09-11 Gen Electric Automatic circuit controller
DE545971C (en) * 1926-06-20 1932-03-08 Voigt & Haeffner Ag Arrangement for preventing the switching off of switches with lower power, which are preceded by a switch with higher power
AT109936B (en) * 1927-04-27 1928-06-11 Aeg Union Elek Wien Device to protect switches and the like against overload.
DE479609C (en) * 1927-07-07 1929-07-19 Bbc Brown Boveri & Cie Electromagnetic self-opening switch with free release, especially for electric vehicle heating
FR801689A (en) * 1935-04-17 1936-08-13 Device for separating the contacts of a switch in the event of a fused circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029912B (en) * 1955-07-21 1958-05-14 Calor Emag Elektrizitaets Ag Electrical switching device for direct or alternating current with overcurrent and short-circuit current protection

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