EP0231469B1 - Disjoncteur de puissance - Google Patents

Disjoncteur de puissance Download PDF

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Publication number
EP0231469B1
EP0231469B1 EP86116663A EP86116663A EP0231469B1 EP 0231469 B1 EP0231469 B1 EP 0231469B1 EP 86116663 A EP86116663 A EP 86116663A EP 86116663 A EP86116663 A EP 86116663A EP 0231469 B1 EP0231469 B1 EP 0231469B1
Authority
EP
European Patent Office
Prior art keywords
current
switching point
valve arrangement
semiconductor valve
commutation
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.)
Revoked
Application number
EP86116663A
Other languages
German (de)
English (en)
Other versions
EP0231469A1 (fr
Inventor
Gerhard Mauthe
Lutz Dr. Niemeyer
Friedrich Dr. Pinnekamp
Norbert Dr. Wiegart
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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
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Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0231469A1 publication Critical patent/EP0231469A1/fr
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Publication of EP0231469B1 publication Critical patent/EP0231469B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • 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
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/541—Contacts shunted by semiconductor devices

Definitions

  • the invention is based on a circuit breaker according to the first part of patent claim 1.
  • the invention relates to a prior art of circuit breakers, such as is described in GB-A-1 147 576.
  • This known circuit breaker contains two switching points connected in series with one another, arranged in a vacuum, and a diode arranged parallel to a first of the two switching points.
  • the first switching point first opens without voltage and then the second switching point opens with a time delay which is determined by the time period in which the diode blocks the current flowing through it after opening the first switching point.
  • the known circuit breaker requires two movable contact pieces, one of which is held by a guide arranged in a vacuum and driven by a spring arranged in a vacuum.
  • FIG. 2 Another circuit breaker is known from FR-A1-2 333 338, in particular Fig. 2.
  • This known circuit breaker contains two switching points connected in series with one another in the path of the current to be switched off, one of which as a power and another is designed as an isolating switching point.
  • a semiconductor valve arrangement supporting the power switching point when switching off is connected in parallel with the power switching point.
  • Movable contacts of the power and isolating switching point are mechanically coupled to one another via a drive rod.
  • the movable contact of the isolating switching point can be moved in a pair of fixed contacts in such a way that when the circuit breaker is switched off, the isolating switching point opens with a predetermined time delay after the circuit breaker.
  • the movable contacts of power and isolating switching points are designed as contact bridges, and that the power and isolating switching point also each have at least two fixed contact pieces.
  • Circuit breakers with semiconductor valves as fast switching elements are further described in US-A-4,209,814 and US-A-4,459,629.
  • at least two semiconductor valves connected in parallel or in series in the opposite passage direction interact with mechanically operating devices which are provided for commutation of the current to be switched off and for isolation of the semiconductor valves.
  • the invention solves the problem of simplifying the circuit breaker of the type mentioned.
  • the circuit breaker according to the invention is characterized in that only a single movable switching element is required in order to fulfill the prescribed switching functions in combination with the commutation of the current to be switched off and the device effecting the isolation of this semiconductor valve. Therefore, it is simple to set up and also easy to control.
  • a device 3 for measuring the current flowing between the current connections 1 and 2 a device 3 for measuring the current flowing between the current connections 1 and 2
  • a commutation device 4 and an isolating switching point 5 are located between two current connections 1, 2, connected in series can be accommodated in a housing which is filled with a gaseous and / or liquid insulating agent or contains a vacuum.
  • a semiconductor valve arrangement 6 and a protective element 7 are connected in parallel to the commutation device 4.
  • the current measuring device 3 contains a sensor that detects the polarity of the current to be switched off.
  • the commutation device contains at least one commutation switching point 8, which is actuated by mechanically driven switching pieces.
  • the commutation device 4 can additionally have a resistance (its values change in the course of actuating the switching elements of the commutation switching point 8), an inductance, such as a transducer, or a capacitor, each in parallel with or in series with the at least one commutation switching point 8.
  • a mechanically driven high-speed switch can be used as the disconnection point 5.
  • the semiconductor valve arrangement 6 can comprise, for example, a single semiconductor valve, such as a diode 10 or a series connection of a plurality of semiconductor valves in the same forward direction.
  • a semiconductor valve can of course be made up of several diodes be constructed in the same forward direction, the pn junctions of which are connected in parallel with one another.
  • the diode 10 it is expedient to design the diode 10 as a disk made of specially doped material and a predetermined thickness. To enable easy pressure contacting, it is advisable to provide the disc with a central hole.
  • the protective element 7 can be formed by a circuit arrangement which preferably contains an RC element and / or an overvoltage arrester based on metal oxide.
  • the output signal emitted by the current measuring device 3 is detected by a control circuit 11, which may contain programmable components, the output of which acts on the commutation device 4 via a drive 12 and on the isolating switching point 5 via a time delay element 13.
  • the current to be switched off flows predominantly through the commutation device 4 bridging the semiconductor valve arrangement 6. If the current is to be switched off and has a polarity corresponding to the forward direction of the semiconductor valve arrangement 6, the control circuit 11 outputs a signal to the drive 12, which a response of the commutation device 4 and thus by forming the switching arc 9 causes an increase in the resistance in the current path containing the commutation device 4.
  • the current to be switched off commutates predominantly into the current path containing the semiconductor valve arrangement 6 and then becomes after the current zero crossing interrupted in the semiconductor valve arrangement 6, which is no longer operated in the reverse direction because of the polarity change.
  • the isolating switching point 5 is mechanically controlled via the drive 12 and the time delay element 13 in such a way that it opens shortly after the zero current crossing at a point in time at which a clearing current flowing through the semiconductor valve arrangement 6 has decayed.
  • FIG. 2 shows the construction of the commutation device 4 and the isolating switching point of a first embodiment of the circuit breaker according to the invention shown in principle in FIG. 1.
  • the commutation device 4 and the isolating switching point 5 consist of three switching elements 14, 15, 16, of which the switching element 14 is connected to the power connection 1 and the anode of the diode 10 forming the semiconductor valve arrangement 6, and the switching element 15 to the cathode of the diode 10 and the switching piece 16 finally with the power connection 2.
  • the switching elements 14 and 16 contact one another, so that the current to be switched off flows from the current connection 1 via the switching elements 14 and 16 to the current connection 2.
  • the diode 10 is activated here and is therefore protected against undesired partial currents in the switch-on position.
  • the control circuit 11 initiates the downward movement of the switching element 16 via the drive 12.
  • the switching elements are designed in such a way that Moving contact piece 16 is contacted with the contact piece 15 as soon as the contact pieces 14 and 16 separate from one another. A switching arc, which is temporarily formed between the switching pieces 14 and 16 and is not shown in FIG.
  • the current to be switched off now commutates into the current path containing the diode 10.
  • the via the switch pieces 14 and 16 of the turn-off current flowing part apparent K decreases i0 within a short time to nearly zero, while in the diode 10 and diode current i D flowing, remaining part of the (from the time t Switched-off current i0 shown in dashed lines increases rapidly.
  • the diode forward voltage U DV now drops as the voltage u D via the diode 10 short-circuited before the time t K.
  • the switching element 16 comes out of engagement with the switching element 15 at time t T , so that the voltage u D across the diode 10 results Discharge of the junction capacitances and the capacitances of the protective element 7 disappears and, accordingly, the voltage u T in the isolating gap formed between the contact pieces 15 and 16 assumes the value of the impressed voltage u0.
  • the stroke s of the moved by the drive 12 contact piece 16 is in this case be dimensioned so that at the time t T of the switching piece 16 yielded stroke corresponds to s K to that distance between the contact pieces 14 and 15, in which the switching member 16 at the instants t K and t T disengages first with the switching piece 14 and then with the switching piece 15 and that at the time t M of the power interruption following voltage maximum of the impressed voltage U0 from the time t T rendered stroke s T is sufficiently large to the in to keep the maximum impressed voltage drop between the switching pieces 15 and 16 formed.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)

Claims (2)

  1. Disjoncteur de puissance comportant :
    - un dispositif de commutation (4) contenant au moins un point de commutation (8);
    - un dispositif à valve semi-conductrice (6) connecté en parallèle au dispositif de commutation (4) et comprenant tout au plus une valve semi-conductrice ou un montage en série de plusieurs valves semi-conductrices de même sens passant;
    - un point de sectionnement (5) connecté en série au dispositif à valve semi-conductrice (6);
    - un circuit de commande (11);
    - pour la détection de la polarité du courant à couper;
    - pour la détection d'un ordre de déclenchement (24);
    - pour la fourniture d'un ordre de réaction agissant sur le dispositif de commutation (4) lorsque le courant détecté s'écoule dans le sens passant du dispositif à valve semi-conductrice (6), et
    - pour la fourniture d'un ordre de déclenchement opérant sur le point de sectionnement (5) lorsque le courant à couper est interrompu après la réaction du dispositif de commutation (4) dans le dispositif à valve semi-conductrice (6),
       dans lequel au moins un point de commutation (8) du dispositif de commutation (4) et le point de sectionnement (5) sont formés par au moins trois pièces de contact (14, 15, 16) parmi lesquelles une première pièce de contact (14) est connectée à une première borne électrique (1) et à une première borne du dispositif à valve semi-conductrice (6), une deuxième pièce de contact (15) est connectée à une seconde borne du dispositif à valve semi-conductrice (6) et une troisième pièce de contact (16) est connectée à une deuxième borne électrique (2), et les pièces de contact (14, 15, 16) du dispositif de commutation (4) et du point de sectionnement (5) sont commandées par un couplage mécanique, de telle sorte que le point de sectionnement (5), après une course des pièces de contact (14, 16) d'au moins un point de commutation (8), effectuée avec un retard prédéfini, s'ouvre à partir d'un instant (tK) auquel, après un passage par zéro du courant à couper, le dispositif à valve semi-conductrice (6) est bloqué, caractérisé en ce que la première pièce de contact (14) et la troisième pièce de contact (16) se touchent dans la position d'enclenchement, que la deuxième pièce de contact (15) et la troisième pièce de contact (16) sont temporairement en contact l'une avec l'autre après l'ouverture d'au moins un point de commutation (8) et que le point de sectionnement s'ouvre lorsqu'un courant de décharge (iA) qui passe à travers le dispositif à valve semi-conductrice (6), après le passage par zéro du courant à couper, a disparu.
  2. Disjoncteur de puissance suivant la revendication 1, caractérisé en ce qu'au moins un élément de protection (7) parallèle au dispositif à valve semiconductrice (6) est prévu.
EP86116663A 1986-01-31 1986-12-01 Disjoncteur de puissance Revoked EP0231469B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH36986 1986-01-31
CH369/86 1986-01-31

Publications (2)

Publication Number Publication Date
EP0231469A1 EP0231469A1 (fr) 1987-08-12
EP0231469B1 true EP0231469B1 (fr) 1991-07-03

Family

ID=4185459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116663A Revoked EP0231469B1 (fr) 1986-01-31 1986-12-01 Disjoncteur de puissance

Country Status (4)

Country Link
US (1) US4764836A (fr)
EP (1) EP0231469B1 (fr)
JP (1) JPS62184718A (fr)
DE (1) DE3680094D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2905796B1 (fr) * 2006-09-11 2008-10-17 Schneider Electric Ind Sas Dispositif et procede de commutation d'un circuit electrique de puissance
DE102014008706A1 (de) 2014-06-18 2015-12-24 Ellenberger & Poensgen Gmbh Trennschalter zur Gleichstromunterbrechung
DE102016106414A1 (de) 2016-04-07 2017-10-12 Eaton Electrical Ip Gmbh & Co. Kg Schaltvorrichtung zum Führen und Trennen von elektrischen Strömen
DE102019102858A1 (de) * 2019-02-05 2019-03-21 Peter Lell Verfahren und Vorrichtung zum dauerhaften Trennen eines Stromkreises mit induktiver Last durch zeitversetztes Schalten zweier in Reihe geschalteter Schalter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388295A (en) * 1964-08-20 1968-06-11 Hubbell Inc Harvey Current interrupter
CH457582A (de) * 1967-02-21 1968-06-15 Sprecher & Schuh Ag Vakuumschalteinrichtung mit zwei Arbeitskontakten zum Unterbrechen von Wechselstrom
FR2333338A1 (fr) * 1975-11-25 1977-06-24 Merlin Gerin Interrupteur hybride synchronise
US4209814A (en) * 1977-10-19 1980-06-24 Gould Inc. Synchronous circuit breaker
US4459629A (en) * 1981-11-23 1984-07-10 General Electric Company Electric circuit breaker utilizing semiconductor diodes for facilitating interruption
US4636907A (en) * 1985-07-11 1987-01-13 General Electric Company Arcless circuit interrupter

Also Published As

Publication number Publication date
EP0231469A1 (fr) 1987-08-12
US4764836A (en) 1988-08-16
DE3680094D1 (de) 1991-08-08
JPS62184718A (ja) 1987-08-13

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