AT48175B

AT48175B - Safety circuit for direct current line systems with an auxiliary line system.

Info

Publication number: AT48175B
Authority: AT
Original assignee: Aeg
Priority date: 1909-06-03
Filing date: 1910-06-03
Publication date: 1911-05-26

Description

  

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 Anfang und Ende des Kabels ein ungleich   grosser oder sogar cm entgegengesetzt gerichteter   Stromstoss, der in den Sekundärwicklungen elektromotorische Kräfte erzeugt, die sich in bezug auf die Relais addieren oder wenigstens infolge ihrer Ungleichheit einen resultierenden Strom erzeugen, wodurch die Relais ansprechen. 



   Fig. 2 zeigt eine andere Schaltung, die sich an diejenige der Patentschrift Nr. 206388 anschliesst und bei der durch Stromstösse in der gleichen Richtung zwar ein Stromstoss im Sekundärkreise entsteht, aber die Relais,   bezw, die   Auslösespulen der Schalter zwischen solchen Punkten   m     und   des Hilfskabels h liegen, welche bei einem primären Stromstoss von gleicher Richtung und   Grösse     annähernd   das gleiche Potential haben. Somit wird die geschützte Strecke im gesunden Zustande nicht abgeschaltet, dagegen wohl im Falle eines Fehlers, wobei die primären Stromstösse in den beiden Enden des geschützten Netzteiles verschieden, bezw. entgegengesetzt gerichtet sind.



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 At the beginning and end of the cable, an unequal or even cm oppositely directed current surge generates electromotive forces in the secondary windings that add up in relation to the relays or at least generate a resulting current as a result of their inequality, whereby the relays respond.



   Fig. 2 shows another circuit which follows on from that of patent specification No. 206388 and in which a current surge occurs in the secondary circuit due to current surges in the same direction, but the relays, respectively the tripping coils of the switches between such points m and des Auxiliary cable h lie, which have approximately the same potential in the event of a primary current surge of the same direction and size. Thus, the protected route is not switched off in a healthy state, but probably in the event of an error, with the primary current surges in the two ends of the protected power supply unit different, respectively. are oppositely directed.

Claims

PATENT CLAIM: Safety circuit for direct current line systems with an auxiliary line system which contains one or more relays which, if a fault occurs in the main line system, cause the disconnection at the faulty point, characterized in that the main and auxiliary lines at opposite ends of the conductor to be protected are inductive in the manner of an alternating current protection system are chained. that depending on whether a fault occurs inside or outside the protected line, resp.

Line section occurs, the electromotive forces resulting from the fault currents in the secondary windings of the current transformer support or cancel each other out in relation to the disconnection elements, while the auxiliary line system is normally without current or voltage.