DE295982C - - Google Patents

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Publication number
DE295982C
DE295982C DENDAT295982D DE295982DA DE295982C DE 295982 C DE295982 C DE 295982C DE NDAT295982 D DENDAT295982 D DE NDAT295982D DE 295982D A DE295982D A DE 295982DA DE 295982 C DE295982 C DE 295982C
Authority
DE
Germany
Prior art keywords
resistors
arrangement according
parallel
cartridges
arrangement
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.)
Active
Application number
DENDAT295982D
Other languages
German (de)
Publication of DE295982C publication Critical patent/DE295982C/de
Active legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02Details
    • H01H85/04Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05Component parts thereof
    • H01H85/143Electrical contacts; Fastening fusible members to such contacts

Landscapes

  • Fuses (AREA)
  • Emergency Protection Circuit Devices (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Bekanntlich bietet die Herstellung geschlossener explosionssicherer Schmelzpatronen für größere Ströme und Spannungen außerordentliche praktische Schwierigkeiten, und. es ist bisher nicht gelungen, derartige Sicherungen über etwa 500 Volt und 200 Ampere zu bauen. Bei größeren Stromstärken hat man sich daher dadurch geholfen, daß man mehrere Patronen einer bewährten Bauart für kleinere Stromstärken parallel schaltete. Dabei hat es sich jedoch ergeben, daß die Stromverteilung infolge der bei der starken Erwärmung auftretenden Oxydationsvorgähge ungleich wird und die Gesamtsicherung vorzeitig durchschmilzt.It is well known that the manufacture of closed explosion-proof melt cartridges for larger currents and voltages extraordinary practical difficulties, and. it is so far it has not been possible to build such fuses over about 500 volts and 200 amps. In the case of larger currents one has therefore helped by having several cartridges of a proven design for smaller ones Connected currents in parallel. However, it has been found that the current distribution as a result of the strong warming that occurs Oxidationsvorgähge becomes unequal and the overall fuse melts through prematurely.

Um diesem Übelstand nach Möglichkeit zu steuern, werden erfindungsgemäß zwischen die Sicherungspatronen und die Abzweigklemmen bzw. Leiter Widerstände geschaltet. Infolge der Vergrößerung des Widerstandes zwischen den Abzweigklemmen wird der Einfluß des veränderlichen Ü bergangswiderstandes zwischen den Sicherungssockeln und Einsatzkontakten und damit die Gefahr des vorzeitigen Durchbrennens bedeutend verringert.In order to control this inconvenience as far as possible, according to the invention between the Fuse cartridges and the branch terminals or conductor resistors switched. As a result the increase in resistance between the branch terminals is the influence of the variable transition resistance between the fuse bases and insert contacts and thus significantly reduces the risk of premature burnout.

In einfachster Weise werden diese Vorschaltwiderstände dadurch gebildet, daß die Anschluß- bzw. Durchführungsbolzen aus Material von möglichst hohem spezifischen Widerstand, vorzugsweise Eisen, hergestellt sind.In the simplest way, these series resistors are used formed in that the connection or lead-through bolts are made of material of the highest possible resistivity, preferably iron.

Die Fig. 1 zeigt ein schematisches Beispiel einer derartigen Anordnung, bei der die Vorschaltwiderstände durch die Bolzen 1 bis 6 gebildet sind, die mit der Leitungsschiene 7 und 8 verschraubt sind.Fig. 1 shows a schematic example such an arrangement, in which the ballast resistors by the bolts 1 to 6 are formed, which are screwed to the line rail 7 and 8.

In Fig. 2 dienen die Durchführungsbolzen 9 bis 14 der Sicherungssockel 15, 16, 17 als Vorschaltwiderstände. Beim Anschluß der Hauptleitungen an die Verteilungsschienen 18 und ist darauf zu achten, daß der Stromverlauf in den Verteilungsschienen möglichst symmetrisch ist. Es empfiehlt sich daher, an diagonal liegenden Stellen anzuschließen.In Fig. 2, the lead-through bolts 9 to 14 of the fuse bases 15, 16, 17 serve as series resistors. When connecting the main lines to the distribution rails 18 and Care must be taken that the current flow in the distribution rails is as symmetrical as possible is. It is therefore advisable to connect at diagonal points.

Bei Parallelschaltung von Patronen verschiedener Stromstärke müssen die Vorschaltwiderstände natürlich so bemessen sein, daß die richtige Stromverteilung eintritt.If cartridges of different amperage are connected in parallel, the series resistors must of course, be dimensioned so that the correct current distribution occurs.

Claims (3)

Patent-Ansprüche: ·Patent claims: 1. Anordnung zur Sicherung der Strom-Verteilung bei parallel geschalteten Schmelzsicherungen, dadurch gekennzeichnet, daß vor die einzelnen Sicherungspatronen Widerstände geschaltet sind, die den Einfluß des Kontaktübergangswiderstandes verrin-1. Arrangement for securing the power distribution with fuses connected in parallel, characterized in that resistors are connected in front of the individual fuse cartridges, which influence the of the contact transition resistance ■ gern.■ gladly. 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Vorschaltwiderstände durch Anschlußbolzen aus Material von möglichst hohem spezifischen Widerstände, vorzugsweise Eisen, gebildet werden. 2. Arrangement according to claim 1, characterized in that the ballast resistors by connecting bolts made of material with the highest possible specific resistance, preferably iron. 3. Anordnung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Zu- und Ableitungen zu den Parallelverbindungen an diagonal liegenden Punkten angeschlossen werden, zum Zwecke, eine symmetrische Stromverteilung zu erzielen.3. Arrangement according to claim 1 and 2, characterized in that the supply and Leads connected to the parallel connections at diagonal points for the purpose of achieving a symmetrical current distribution. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DENDAT295982D Active DE295982C (en)

Publications (1)

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DE295982C true DE295982C (en)

Family

ID=550413

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DE (1) DE295982C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619564A (en) * 1948-03-12 1952-11-25 Underwood Electric & Mfg Co In Circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619564A (en) * 1948-03-12 1952-11-25 Underwood Electric & Mfg Co In Circuit breaker

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