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DE322536C - Protection arrangement for measuring instruments, relays, counters, etc. connected to current transformers. like - Google Patents

Protection arrangement for measuring instruments, relays, counters, etc. connected to current transformers. like

Info

Publication number
DE322536C
DE322536C DENDAT322536D DE322536DD DE322536C DE 322536 C DE322536 C DE 322536C DE NDAT322536 D DENDAT322536 D DE NDAT322536D DE 322536D D DE322536D D DE 322536DD DE 322536 C DE322536 C DE 322536C
Authority
DE
Germany
Prior art keywords
counters
relays
measuring instruments
protection arrangement
current transformers
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
DENDAT322536D
Other languages
German (de)
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
Publication date
Application granted granted Critical
Publication of DE322536C publication Critical patent/DE322536C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase AC
    • H01F38/28—Current transformers
    • H01F38/32—Circuit arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Description

Schutzanordnung für an Stromwandler angeschlossene meßinstrumente, Relais, Zähler u. dgl. Es ist bekannt, in die Sämmelschienen oder Speiseleitungen elektrischer Verteilungsanlagen Drosselspulen einzubauen, die bezwekken, den bei einem Kurzschluß auftretenden Strom in zulässigen Grenzen zu halten. In Anlagen, in denen primär keine Drosselspulen angeordnet sind, leiden bei einem Kurzschluß vor allen Dingen die mittels. Stromwandlers angeschlossenen Meßinstrumente, Relaisspulen, Zähler u. dgl., und zwar sowohl infolge der dynamischen als infolge der thermischen Beanspruchung.Protective arrangement for measuring instruments connected to current transformers, Relays, counters and the like are known to be installed in the Sämmelschienen or feed lines electrical distribution systems to install inductors, which are intended for to keep the current occurring in the event of a short circuit within permissible limits. In plants, in which primarily no choke coils are arranged suffer in the event of a short circuit especially the means. Measuring instruments connected to the current transformer, relay coils, Counters and the like, both as a result of the dynamic and the thermal Stress.

Nach -der Erfindung werden in den Sekundärkreis der Stromwandler Drosselspulen mit oder ohne Eisen eingebaut, die bei geringen Strömen keinen wesentlichen Einfluß auf die Anzeigeinstrumente ausüben und nur bei starkem Überstrom - den Sekundärstrom des Stromwandlers so stark begrenzen, daß die angeschlossenen Instrumente keinen Schaden leiden.According to the invention, inductors are used in the secondary circuit of the current transformer with or without iron built in, which has no significant effect at low currents exercise on the display instruments and only in the case of strong overcurrent - the secondary current of the current transformer so much that the connected instruments do not Suffer harm.

Die Figur zeigt beispielsweise eine Aufnahme eines Stromwandlers, und zwar stellt die gestrichelte Linie das übersetzungsverhältnis ohne Drosselspule im Sekundärkreis, die ausgezogene Linie das übersetzungsverhältnis mit Drosselspule im Stromkreis dar. Wie ersiehtlich, stimmt das Übersetzungsverhältnis bis zu etwa ioo Amp. primär bei beiden Anordnungen überein. Erst bei außergewöhnlich großen Strömen zeigt sich der durch die Drosselspule hervorgerufene Abfall, so daß beispielsweise bei q.oo Amp. primär der Sekundärstrom mit Drosselspule nur noch i2o Amp. beträgt, während er ohne Drosselspule auf aio Amp. ansteigen würde.The figure shows, for example, a recording of a current transformer, namely, the dashed line represents the transmission ratio without the choke coil in the secondary circuit, the solid line shows the transmission ratio with the choke coil in the circuit. As can be seen, the gear ratio is up to about ioo amp. primarily the same in both arrangements. Only with exceptionally large ones Flow shows the drop caused by the choke coil, so that for example at q.oo amp. primary the secondary current with the choke coil is only i2o amp., while without a choke it would go up to aio amp.

Claims (1)

PATENT-ANsPRUCH: Schutzanordnung für an Stromwandler angeschlossene Meßinstrumente, Relais, Zähler u. dgl. in elektrischen Verteilungsanlagen, dadurch gekennzeichnet, daß im Sekundärstromkreis der Stromwandler Drosselspulen eingebaut sind, die bei geringen Strömen keinen wesentlichen Einfluß auf die Anzeigeinstrumente ausüben und nur bei starkem Überstrom den Sekundärstrom des Stromwandlers so stark begrenzen, daß die angeschlossenen Instrumente keinen Sehaden leiden.PATENT CLAIM: Protection arrangement for connected to current transformers Measuring instruments, relays, counters and the like in electrical distribution systems, thereby characterized in that inductors are installed in the secondary circuit of the current transformer which do not have a significant effect on the display instruments at low currents exercise and only with strong overcurrent the secondary current of the current transformer so strong limit that the connected instruments do not suffer from sight damage.
DENDAT322536D Protection arrangement for measuring instruments, relays, counters, etc. connected to current transformers. like Expired DE322536C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE322536T

Publications (1)

Publication Number Publication Date
DE322536C true DE322536C (en) 1920-07-02

Family

ID=6167834

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT322536D Expired DE322536C (en) Protection arrangement for measuring instruments, relays, counters, etc. connected to current transformers. like

Country Status (1)

Country Link
DE (1) DE322536C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001384B (en) * 1951-10-01 1957-01-24 Philips Nv Device to limit the current of an electrical oscillation by using the saturation properties of ferromagnetic cores

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001384B (en) * 1951-10-01 1957-01-24 Philips Nv Device to limit the current of an electrical oscillation by using the saturation properties of ferromagnetic cores

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