EP0504462A1 - Dispositif pour interrompre un circuit - Google Patents

Dispositif pour interrompre un circuit Download PDF

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Publication number
EP0504462A1
EP0504462A1 EP91104456A EP91104456A EP0504462A1 EP 0504462 A1 EP0504462 A1 EP 0504462A1 EP 91104456 A EP91104456 A EP 91104456A EP 91104456 A EP91104456 A EP 91104456A EP 0504462 A1 EP0504462 A1 EP 0504462A1
Authority
EP
European Patent Office
Prior art keywords
circuit
main current
network
branch
current path
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.)
Withdrawn
Application number
EP91104456A
Other languages
German (de)
English (en)
Inventor
Fritz Dipl.-Phys. Pohl
Johann Dr. Dipl.-Ing. Wolf
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP91104456A priority Critical patent/EP0504462A1/fr
Publication of EP0504462A1 publication Critical patent/EP0504462A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H01H9/465—Shunt circuit closed by transferring the arc onto an auxiliary electrode

Definitions

  • the invention relates to an arrangement for interrupting a circuit, which has a main current path with at least one contact point with an arc extinguishing region, a branch leading to an external connection.
  • a construction is initially comparable to the construction of a three-pole module which is the subject of an application with an older seniority (EP: 90 113 093.0), the branch there leading away from the main current path.
  • Circuit breakers which are designed to essentially interrupt the current, could only be provided with great effort in practice with stringent demands on the selectivity, but nevertheless have so far not been satisfactorily available for many applications. In practice, one has reached technical limits when reducing the let-through current square time value, since neither a significantly faster tripping and contact opening nor a substantial increase in the arc voltage to be established could be achieved with economically justifiable effort.
  • the invention has for its object to develop an arrangement for interrupting a circuit, which is simple and allows a further reduction in the current square time value.
  • the solution to the problem described is achieved by an arrangement according to claim 1.
  • Such a branch enables a separate energy conversion in a feed circuit and in a load circuit.
  • the supply circuit also referred to as the input circuit
  • the input circuit can be connected between the input connection of the main current path and the external connection of the branch and the load circuit, also referred to as the output circuit, between the output connection of the main current path and the external connection of the branch.
  • limiters are based on the principle of additionally limiting the current over a switching path in the event of a shutdown by switching on further current-limiting means. However, no currents are derived from devices that follow the main current path. Deriving currents, as already proposed by an older seniority (EP: 90 113 093.0) and not just limiting the current, enables further modes of operation, for example the decoupling of an input circuit from the output circuit. This decoupling is particularly important for a larger inductance in the output. Limiters, on the other hand, which are only intended to limit the current in the main current path, are known in a wide variety of designs (for example EP-A-0 350 825).
  • the branch is connected to the main current path via the arc plasma during the switch-off process.
  • the main current path in the outer conductor, formerly called the phase conductor, of a network is switched on and the branch is connected to the neutral conductor of the network.
  • several main current paths can be connected into the outer conductors of a network, the branches of which are connected to the neutral conductor of the network, or the branches of which are electrically connected to one another at a "floating" potential at a common point.
  • the arrangement 13 for interrupting a circuit has a main current path 1, a contact point 2 and a branch 7 which is led out to its own external connection 9.
  • the branch 7 is uninterrupted and connected in the arc extinguishing area with the quenching plates 8 and 18 via the arc plasma when the contact point 2 opens and draws an arc as a result of a short circuit in the load circuit.
  • the number of quenching plates 8 and 18 determine the distribution of the voltage of an input circuit and the voltage of an output circuit in the event of a shutdown. Instead of the quenching plates, there is also a corresponding distance to the junction of branch 7. In the exemplary embodiment according to FIG. 1, this connection is designed as a wider arc quenching plate.
  • the main current path 1 can be connected via an input connection 12 and via its output connection 22 and via the connection 9 of the branch 7 in a network to be protected. In this case, an outer conductor and a neutral conductor must be connected to the connections 12 and 22.
  • the arrangement 13 is supplemented by a neutral conductor with an interruption point to form a larger arrangement unit.
  • two arrangements 13 according to FIG. 1 are connected to one another with their separate connections 9 and 109 for the branches.
  • An outer conductor can be connected to the main current path with the connections 12 and 22 and a further outer conductor can be connected to the other main current path with the input connection 112 and the output connection 122.
  • the output circuit is decoupled from the input circuit via the connection that is established in the event of a shutdown between the output connections 22 and 122 on the one hand and via the input connections 12 and 112 on the other hand.
  • the connected arrangements 13 form an extended arrangement element, which can also be designed as a device-like unit.
  • three arrangements 13 are connected to one another in such a way that three main current paths can be switched into three outer conductors of a network and a common connecting piece 19 for connecting a neutral conductor of a network is connected to the branches with connections 9, 209 and 309. If necessary, a contact point or separation point can be implemented in the connecting piece.
  • the three arrangements 13 form a larger arrangement unit for three outer conductors and one neutral conductor.
  • the most diverse multi-pole devices can be built up by appropriate combinations.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
EP91104456A 1991-03-21 1991-03-21 Dispositif pour interrompre un circuit Withdrawn EP0504462A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP91104456A EP0504462A1 (fr) 1991-03-21 1991-03-21 Dispositif pour interrompre un circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91104456A EP0504462A1 (fr) 1991-03-21 1991-03-21 Dispositif pour interrompre un circuit

Publications (1)

Publication Number Publication Date
EP0504462A1 true EP0504462A1 (fr) 1992-09-23

Family

ID=8206555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104456A Withdrawn EP0504462A1 (fr) 1991-03-21 1991-03-21 Dispositif pour interrompre un circuit

Country Status (1)

Country Link
EP (1) EP0504462A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924752A (en) * 1957-07-12 1960-02-09 Ite Circuit Breaker Ltd Combined circuit breaker and short circuiter
EP0205369A1 (fr) * 1985-05-29 1986-12-17 Merlin Gerin Disjoncteur basse tension à effet shunt
EP0350825A2 (fr) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Appareil de commutation électrique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924752A (en) * 1957-07-12 1960-02-09 Ite Circuit Breaker Ltd Combined circuit breaker and short circuiter
EP0205369A1 (fr) * 1985-05-29 1986-12-17 Merlin Gerin Disjoncteur basse tension à effet shunt
EP0350825A2 (fr) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Appareil de commutation électrique

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