EP0504464B1 - Dispositif de commutation pour interrompre un circuit - Google Patents

Dispositif de commutation pour interrompre un circuit Download PDF

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Publication number
EP0504464B1
EP0504464B1 EP91104458A EP91104458A EP0504464B1 EP 0504464 B1 EP0504464 B1 EP 0504464B1 EP 91104458 A EP91104458 A EP 91104458A EP 91104458 A EP91104458 A EP 91104458A EP 0504464 B1 EP0504464 B1 EP 0504464B1
Authority
EP
European Patent Office
Prior art keywords
switching device
branch
circuit
contact point
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.)
Expired - Lifetime
Application number
EP91104458A
Other languages
German (de)
English (en)
Other versions
EP0504464A1 (fr
Inventor
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 DE59108267T priority Critical patent/DE59108267D1/de
Priority to AT91104458T priority patent/ATE144077T1/de
Priority to EP91104458A priority patent/EP0504464B1/fr
Publication of EP0504464A1 publication Critical patent/EP0504464A1/fr
Application granted granted Critical
Publication of EP0504464B1 publication Critical patent/EP0504464B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 a switching device for interrupting a circuit, wherein three-pole modules form the most diverse electrical single-pole and multi-pole devices, possibly with the addition of a neutral conductor path.
  • a three-pole module has a main current path with at least one contact point which can be switched by means of a tripping element or tripping elements and / or telecontrol devices and / or manual control element, possibly with the interposition of a switch lock.
  • the module also has a branch from the main current path, in which a current limiting device is arranged.
  • Such a module is the subject of an application with an older seniority (EP: 90 113 093.0).
  • Components or devices arranged downstream of the main current path are already protected against excessive current square time values during the switch-off process. This protection against overcurrent is particularly important in the event of a short circuit.
  • the transfer of excessively high currents to the branch relieves the facilities downstream of 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 requirements for selectivity, but have so far not been satisfactory for many applications. In practice, one has reached technical limits when reducing the let-through current square time value, since neither much faster tripping and contact opening nor one substantial increase in the arc voltage to be built 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 problem described is achieved by a switching device according to claim 1.
  • the switching device forms two connection sides, each of which forms a current path between two electrical poles on each connection side when the switch contacts are opened. Via the branch from the main current path, an input circuit and an output circuit can be connected to it, which are decoupled from each other when the switching device responds, so that part of the short-circuit energy from the supply circuit is directed past the load circuit to be protected. Since the switching device forms two connection sides in the event of a shutdown, both circuits are decoupled from one another at an early stage, as a result of which the supply of energy is prevented at an early stage. It is therefore only necessary to dissipate the energy already contained in the load circuit to be protected at this time. The energy reduction is supported by at least one current limiting device.
  • a linear resistor also a complex resistor - impedance -, a non-linear resistor, an arc quenching device or generally a device for building a counter voltage or a counter electromotive force, EMF, is suitable as the current limiting device. In particular, it can also be an arc extinguishing device.
  • a switching device for interrupting a circuit between a supply network and a load is known (US-A-2 924 752), the contact point of which can be opened with a trigger element or manual control element by means of a key switch, the switching device having two connection sides.
  • the current limiting device in the branch is made up of at least two arc extinguishing devices, at least one of which is arranged before and one after the contact point in the branches of the branch.
  • the contact point or contact arrangement can be designed such that it forms at least one interruption point, each of which has at least one movable contact.
  • the subclaims relate to advantageous configurations.
  • the switching device has a three-pole module 13 with a main current path 1 and a contact point 2.
  • a fork-shaped branch 7 leads from the main current path 1 in front of and behind the contact point 2 to a separate connection, the external connection 9 of the branch.
  • Current limiting devices 8 and 18, which can advantageously be designed as arc quenching devices, are arranged such that one is arranged before and one after the contact point 2 in a fork in the branch 7.
  • An input circuit 14 with inductance, active resistance and electromotive force, EMF can be connected between the input connection 12 of the main current path 1 and the external connection 9 of the branch.
  • An output circuit 15 with inductance and active resistance can be connected between the output connection 22 of the main current path 1 and the external connection 9 of the branch 7.
  • the output circuit 15 here represents a consumer network with several branches.
  • the switching device according to FIG. 2 shows another exemplary embodiment for the three-pole module 13.
  • a contact point 2 In the main current path 1 is a contact point 2, which as
  • Double interrupter is executed, arranged and the current limiting devices 8 and 18 are the stack of quenching plates of the two interrupter contacts of the double interrupter in the exemplary embodiment.
  • Such a construction is known in principle from contactors.
  • the connecting rail opposite the switching bridge is part of branch 7 here.
  • two arrangements 13, for example according to FIG. 1 or according to FIG. 2 are connected to one another with their separate connections 9 for the branches.
  • Different three-pole modules 13 can also be used, which is why the reference symbols of the connections only provide a systematic match give recognition.
  • An outer conductor can be connected to a main current path with the connections 12 and 22 and a further outer conductor can be connected to another main current path with the input connection 12 and the output connection 22.
  • the decoupling of the output circuit from the input circuit is ensured via the two current limiting devices 8 and via the two current limiting devices 18 of the two modules 13.
  • the connected arrangements 13 form an expanded switching device element 16.
  • each of the three modules 13 has its connection 9 for its branch 7 connected to a common connection branch 17 which has the connections 118 and 218.
  • the extended switching device element 19 can be connected with the connections 12 and 22 in a first outer conductor, in a second outer conductor and in a third outer conductor.
  • a neutral conductor can be connected to the common connection branch 17.
  • the extended switching device element 19 forms a so-called electrical four-pole device for three outer conductors and one neutral conductor.
  • a further contact point 20 is in the path for connecting a neutral conductor arranged, which cooperates with the contact point 2 in the module 13.
  • An additional current limiting element 21 is arranged in the path of the branch 7.
  • An enlarged switching device element 22 for an outer conductor and a neutral conductor is thereby obtained.
  • the switching device according to FIG. 6 results from the arrangement according to FIG. 3 by switching on an additional current limiting element 21 in the path of the branches 7.
  • the circuit device according to FIG. 7 can be derived from the circuit device according to FIG. 4 in that additional current limiting elements 21 are switched on in the paths of the branches 7 to the common connecting branch 17. If necessary, a further contact point 20 can be provided in the common connecting branch 17.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Power Conversion In General (AREA)
  • Selective Calling Equipment (AREA)
  • Breakers (AREA)

Claims (5)

  1. Dispositif d'interruption d'un circuit,
    - dans lequel est disposé au moins un module tripolaire (13) qui comporte un trajet (1) de courant principal ayant au moins un point (2) de contact pouvant être mis à l'état conducteur au moyen d'au moins un organe de déclenchement ou d'un organe d'actionnement manuel, éventuellement par l'intermédiaire d'un verrou de maintien,
    - le dispositif d'interruption comportant deux côtés (14, 15) de raccordement, de sorte qu'un trajet de courant se forme par côté de raccordement entre deux pôles électriques en cas d'ouverture du point (2) de contact ,
    - le module tripolaire ou les modules tripolaires a ou ont une dérivation (7) bifurquant, dont les extrémités de bifurcation sont connectées devant et derrière le point (2) de contact, les bifurcations comportant chacune un dispositif (8 ; 18) de limitation de courant.
  2. Dispositif d'interruption suivant la revendication 1,
       caractérisé en ce que
       les dispositifs (8 ; 18) de limitation de courant dans les bifurcations de la dérivation (7) sont sous la forme d'au moins deux dispositifs d'extinction d'arc électrique.
  3. Dispositif d'interruption suivant la revendication 1 ou 2,
       caractérisé en ce que
       les dérivations (7) sortent de plusieurs modules (13) chacune en direction de bornes (17) de même pôle électrique.
  4. Dispositif d'interruption suivant la revendication 1 ou 2,
       caractérisé en ce que
       deux modules (13) tripolaires sont reliés par leurs dérivations (7) et forment par leurs deux autres pôles chacun deux bornes électriques de chaque côté de raccordement.
  5. Dispositif d'interruption suivant l'une des revendications 2 à 4,
       caractérisé en ce que
       un élément supplémentaire (21) de limitation de courant est disposé dans la voie de conduction d'une dérivation (7).
EP91104458A 1991-03-21 1991-03-21 Dispositif de commutation pour interrompre un circuit Expired - Lifetime EP0504464B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59108267T DE59108267D1 (de) 1991-03-21 1991-03-21 Schalteinrichtung zur Unterbrechung eines Stromkreises
AT91104458T ATE144077T1 (de) 1991-03-21 1991-03-21 Schalteinrichtung zur unterbrechung eines stromkreises
EP91104458A EP0504464B1 (fr) 1991-03-21 1991-03-21 Dispositif de commutation pour interrompre un circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91104458A EP0504464B1 (fr) 1991-03-21 1991-03-21 Dispositif de commutation pour interrompre un circuit

Publications (2)

Publication Number Publication Date
EP0504464A1 EP0504464A1 (fr) 1992-09-23
EP0504464B1 true EP0504464B1 (fr) 1996-10-09

Family

ID=8206557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104458A Expired - Lifetime EP0504464B1 (fr) 1991-03-21 1991-03-21 Dispositif de commutation pour interrompre un circuit

Country Status (3)

Country Link
EP (1) EP0504464B1 (fr)
AT (1) ATE144077T1 (fr)
DE (1) DE59108267D1 (fr)

Family Cites Families (2)

* 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
FR2582857B1 (fr) * 1985-05-29 1989-04-28 Merlin Gerin Disjoncteur unipolaire et neutre a effet shunt

Also Published As

Publication number Publication date
ATE144077T1 (de) 1996-10-15
EP0504464A1 (fr) 1992-09-23
DE59108267D1 (de) 1996-11-14

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