EP0211707A1 - Elektrischer Schaltschutz für Kondensatoranlagen - Google Patents

Elektrischer Schaltschutz für Kondensatoranlagen Download PDF

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Publication number
EP0211707A1
EP0211707A1 EP86401392A EP86401392A EP0211707A1 EP 0211707 A1 EP0211707 A1 EP 0211707A1 EP 86401392 A EP86401392 A EP 86401392A EP 86401392 A EP86401392 A EP 86401392A EP 0211707 A1 EP0211707 A1 EP 0211707A1
Authority
EP
European Patent Office
Prior art keywords
pair
contacts
circuit breaker
static switch
contactor
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.)
Granted
Application number
EP86401392A
Other languages
English (en)
French (fr)
Other versions
EP0211707B1 (de
Inventor
Jean Boisdon
Jean-Luc Mertz
François Dieppedalle
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0211707A1 publication Critical patent/EP0211707A1/de
Application granted granted Critical
Publication of EP0211707B1 publication Critical patent/EP0211707B1/de
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
    • 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
    • H01H9/542—Contacts shunted by static switch means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • 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 alternating current circuit breaker-contactor, in particular for connecting capacitor banks, comprising by pole a first and a second pair of mechanical contacts, electrically connected in series: - an electromagnet for remote control of opening and closing of said first pair of mechanical contacts; - an automatic tripping mechanism on fault and opening of said second pair of mechanical contacts; - At least one arc electrode disposed near one of the contacts of said second pair to capture the arc drawn during the separation of the contacts of said second pair.
  • the first pair of mechanical contacts acts as a contactor for switching the capacitor bank on or off, while the second pair of mechanical contacts acts as a protective circuit breaker intervening in the event of short- circuits or overloads.
  • the circuit breaker-contactor can be controlled by a varmetric relay allowing the interlocking by capacitor banks.
  • the mechanical contacts ensuring normal engagement or tripping, have great endurance, while the contacts of the circuit breaker part resist the action of a drawn arc during an opening on short circuit.
  • Circuit breakers-contactors of the kind mentioned have the drawback of wear of the mechanical contacts of the contactor part, due to short-term current spikes, appearing on closing on a capacitive circuit. These current peaks generate micro-welds of the contacts and rapid erosion of the latter.
  • the present invention aims to achieve a high endurance contactor circuit breaker providing total protection.
  • the circuit breaker-contactor according to the invention is characterized in that said arcing electrode belongs to a shunt circuit of said first pair of contacts for deriving the current passing through said first pair of contacts in the shunt circuit as soon as the switching of the arc on said electrode, a static switch, in particular a triac or thyristor switch, is connected to the terminals of said first pair of contacts in parallel with said shunting circuit, that a zero-crossing detector controls the initiation of said static switch on the zero-crossing of the potential difference between the alternating current source and the capacitor, during an order to close said first pair of mechanical contacts with a offset such that the establishment of the current is always established by the static switch.
  • a static switch in particular a triac or thyristor switch
  • the static switch in particular the triac, allows synchronization of the closing of the circuit, avoiding or limiting current spikes, but it has the disadvantage of a significant voltage drop and a high sensitivity to short circuits.
  • the voltage drop is the cause of a significant heating and according to the invention, the triac is shunted in normal operation by the mechanical contacts of the contactor.
  • the static switch only intervenes for a short time when the circuit breaker-contactor closes and possibly when it opens.
  • the circuit breaker-contactor comprises a shunting circuit which intervenes by switching the arc on an arc electrode, from the opening of the contacts of the circuit breaker part.
  • the shunt circuit shifts the current to protect the static switch. It is easy to see that the circuit breaker part protects the capacitors and the line against overloads and short circuits, as well as the protection of the static switch and the contacts of the contactor part against short circuits. The contacts of the contactor part are protected against current peaks by the static switch which closes before the mechanical contacts and opens after the latter.
  • the static switch is suitable for an opening command synchronized with the zero crossing of the current.
  • the circuit breaker-contactor is advantageously of the type with a narrow or miniature molded housing, all the constituent elements being housed in the same housing or according to a preferred embodiment in separate housings allowing modular assembly.
  • the static switch the dimensions of which are relatively small, is advantageously incorporated, either in the casing of the circuit breaker part, or in that of the contactor, so as to limit the electrical connections.
  • the circuit breaker includes a thermal trip device and an electromagnetic trip device, which can optionally be replaced by electronic trip devices well known to specialists.
  • a reset and / or manual control lever allows the opening and closing of the circuit breaker contacts to ensure circuit isolation.
  • the contactor preferably comprises a contact bridge actuated in the closed position, when an electromagnet is excited and returned to the open position by a return spring, during the de-excitation of this electromagnet.
  • the contactor can also be of the pulse control type, each pulse causing a change of state in the manner of the remote control switches.
  • Figure 1 corresponds to that of French patent application No. 82 15841 of September 17, 1982 to which we will advantageously refer for further details on the operation of the circuit breaker, static switch combination.
  • a miniature molded case 12 containing the circuit breaker part designated by the general reference 10.
  • the case 12 has at its rear face 14 a fixing latch 16 and at its front part 18 a control lever 20 d a mechanism 30.
  • a pair of fixed 22 and movable contacts 24 are disposed opposite a breaking chamber 26 with deionization plates 28.
  • the end plates of the chamber 26 are extended in the direction of the contacts 22, 24, to form arc horns 39, 41.
  • the movable contact 24 is integral with a contact arm 42, pivotally mounted on a rocker arm 44, actuated by a toggle 46, articulated on the lever 20.
  • a trigger lever 48 pivotally mounted on an axis 50 cooperates, on the one hand with the contact arm 42 and on the other hand with a lock 52, capable of being actuated by a bimetallic strip 34 and / or an electromagnetic trip device 36.
  • the electrical circuit comprises an input terminal 38 and an output terminal 40 between the scales are successively connected in series with the bimetallic strip 34, the coil of the electromagnetic trip device 36, the contacts 22, 24, and a static switch 56.
  • the static switch 56 is, for example, a triac or a pair of thyristors mounted head to tail.
  • the ignition electrode is connected to a terminal 57 of the housing 12, receiving a control wire 58.
  • the arcing horn or electrode 39 extends to near the fixed contact 22, leaving a small gap 65 remaining.
  • the arcing horn 39 is connected by a conductor 62 to a point 64, disposed between the switch static 56 and terminal 40.
  • this circuit breaker-static switch part is apparent from the preceding discussion and from the above-mentioned French patent application.
  • the contacts 22, 24 are closed, the static switch ensuring the opening and closing of the circuit in the manner of a remote-controlled contactor. Protection is provided by the circuit breaker, the triggers 34, 36 of which cause the contacts 22, 24 to open in the event of an overload or short-circuit.
  • the arc drawn between these contacts switches to the electrode 39 by closing the shunting circuit 62, to divert the current passing through the static switch 56.
  • This bypass protects the triac or the thyristors of this static switch. After extinction of the arc in the breaking chamber 26, the circuit is interrupted.
  • the circuit breaker housing 12 is joined a contactor housing 66 of the same profile, containing a pair of fixed contacts 68, 70, cooperating with a contact bridge 72.
  • the contact bridge 72 is integral with an armature 74, controlled by an electromagnet 76.
  • the electromagnet 76 is supplied by a conductor 78, the armature 74 is attracted and the contact bridge 72 closed.
  • a return spring 80 biases the contact bridge 72 in the open position, as soon as the supply to the electromagnet 76 is interrupted.
  • the fixed contact 70 is connected by a connection to one of the terminals of the static switch 56, while the opposite fixed contact 68 is connected to the other terminal, for example at point 64 of the static switch 56.
  • the conductor 78 is connected to control block 60, which receives, on the other hand, a control signal delivered by a detector 80 and an external control signal 82.
  • the circuit breaker-contactor according to the invention operates as follows: - the contacts 22, 24, of the circuit breaker part are normally closed. An order to close the circuit breaker-contactor according to the invention is sent by the conductor 82 to the control unit 60. The latter receives from the detector 80 the information relating to the alternating current to emit on the trigger or the control electrode 58 of the 'switch 56 a conduction order at zero crossing of the potential difference between the network and the capacity.
  • the control block 60 sends, on the other hand, as soon as the static switch 56 is closed, an order to close the contacts 68, 70, 72 of the contactor part. As soon as these mechanical contacts 68, 70, 72 are closed, the static switch 56 is bypassed and almost all of the current flows through the mechanical contacts 68, 70, 72 which have a lower electrical resistance. This avoids overheating of the static switch 56.
  • An opening order transmitted by the conductor 82 to the control unit 60 similarly causes, at first, an opening of the mechanical contacts 68, 70, 72, and thereafter when the current goes to zero an opening of the static switch 56. It is easy to see that the mechanical contacts 68, 70, 72, ensure the conduction of the current, while the static switch 56 ensures the establishment and the interruption of the current.
  • the movable contact 24 moves quickly by drawing an arc between the contacts 22, 24.
  • the root of the arc anchored on the fixed contact 22 quickly switches to the arc electrode 39, authorizing the passage of current through the shunt conductor 62.
  • the current bypass by the shunt conductor 62 protects both the static switch 56 and the contacts 68, 70, 72.
  • the circuit breaker also protects the circuit connected downstream, in particular the capacitor (not shown). The reclosing of the circuit breaker by the handle 20 allows a reconditioning of the circuit breaker-contactor for a new closing operation.
  • FIG. 5 illustrates an alternative embodiment, in which the arc electrode 41 is associated with the movable contact 24, so as to pick up the arc anchored on this movable contact 24.
  • the static switch 56 is, in this case, interposed between the movable contact 24 and the terminal 38 associated with the latter contact.
  • the mechanical contacts 68, 70, 72 are connected in the manner described above to the terminals of the switch 56, the control unit 60 controlling in an identical manner the static switch 56 and the electromagnet 76 of the contactor part. The operation remains of course identical to that described above, the circuit breaker ensuring all of the protection, as soon as the arc is switched on the electrode 41.
  • the modular system has the advantage of allowing the use of standard elements, for example of a contactor element 66 or remote control switch, comprising an appropriate electrical connection system.
  • the static switch has been incorporated in the box 12 of the circuit breaker part, but it is clear that this switch can be incorporated in a separate box or possibly in the box 66 of the contactor part.
  • the control block 60 can be an independent part, possibly remote from the circuit breaker-contactor or be incorporated in one of the boxes.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP86401392A 1985-07-04 1986-06-25 Elektrischer Schaltschutz für Kondensatoranlagen Expired - Lifetime EP0211707B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8510394A FR2584529B1 (fr) 1985-07-04 1985-07-04 Disjoncteur-contacteur electrique, notamment pour des batteries de condensateurs
FR8510394 1985-07-04

Publications (2)

Publication Number Publication Date
EP0211707A1 true EP0211707A1 (de) 1987-02-25
EP0211707B1 EP0211707B1 (de) 1990-06-13

Family

ID=9321057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401392A Expired - Lifetime EP0211707B1 (de) 1985-07-04 1986-06-25 Elektrischer Schaltschutz für Kondensatoranlagen

Country Status (5)

Country Link
US (1) US4725911A (de)
EP (1) EP0211707B1 (de)
JP (1) JPH0746552B2 (de)
DE (1) DE3672020D1 (de)
FR (1) FR2584529B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0465694A1 (de) * 1990-07-09 1992-01-15 Siemens Aktiengesellschaft Schalteinrichtung
EP0649156A1 (de) * 1993-10-15 1995-04-19 Schneider Electric Sa Schutzeinrichtung dargestellt durch die Reihenschaltung eines Schutzschalters mit einem Schaltgerät

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2625603B1 (fr) * 1987-12-30 1993-05-07 Telemecanique Electrique Appareil interrupteur electrique protege et son dispositif de fixation
DE3824027A1 (de) * 1988-07-15 1990-01-18 Asea Brown Boveri Elektrisches schaltgeraet
GB8819164D0 (en) * 1988-08-12 1988-09-14 Ass Elect Ind Circuit breaker
DE4040359C2 (de) * 1990-12-17 1994-01-27 Siemens Ag Einrichtung zum Kurzschlußschutz
DE4110335C2 (de) * 1991-03-28 1995-07-20 Siemens Ag Einrichtung zum Kurzschlußschutz
US5410442A (en) * 1992-02-17 1995-04-25 Siemens Aktiengesellschaft Electromechanical protection devcie
FR2696062B1 (fr) * 1992-09-23 1994-12-09 Sgs Thomson Microelectronics Commutateur électrique de puissance commandé et procédé de commutation d'un circuit électrique de puissance.
FR2707437B1 (fr) * 1993-07-05 1995-08-11 Telemecanique Dispositif de protection et de commande pour charge électrique.
FR2711270B1 (fr) * 1993-10-15 1995-11-24 Merlin Gerin Appareillage de protection électrique à disjoncteur et effecteur.
FR2714520B1 (fr) * 1993-12-24 1996-01-19 Telemecanique Appareil électrique interrupteur à contacts séparables.
FR2742916B1 (fr) * 1995-12-21 1998-01-16 Schneider Electric Sa Dispositif electrique a commutation d'arc
FR2748612B1 (fr) * 1996-05-10 1998-06-19 Schneider Electric Sa Circuit pour l'alimentation protegee d'une charge electrique
AUPQ672300A0 (en) 2000-04-05 2000-05-04 Nu-Lec Industries Pty Limited Isolating circuit breaker and circuit protection arrangement
CN201004435Y (zh) * 2006-08-25 2008-01-09 百利通电子(上海)有限公司 一种交流继电器
JP4844372B2 (ja) * 2006-12-04 2011-12-28 パナソニック株式会社 スイッチ装置及びこれを用いたリモコン送信機
JP4910666B2 (ja) * 2006-12-04 2012-04-04 パナソニック株式会社 スイッチ装置及びこれを用いたリモコン送信機
US8619395B2 (en) 2010-03-12 2013-12-31 Arc Suppression Technologies, Llc Two terminal arc suppressor
RU192529U1 (ru) * 2018-12-25 2019-09-23 Общество с ограниченной ответственностью "Армавирский литейный завод" Устройство управления нулевым расцепителем комплектного устройства управления проходческим комбайном
US11509128B2 (en) 2020-09-14 2022-11-22 Abb Schweiz Ag Multi-port solid-state circuit breaker apparatuses, systems, and methods
FR3145061A1 (fr) * 2023-01-13 2024-07-19 Safran Electrical & Power Contacteur électrique à dispositif de coupure intégré

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1050982A (fr) * 1951-03-21 1954-01-12 Siemens Ag Commande à contacteurs en particulier pour installations au fond dans les mines
FR1590945A (de) * 1967-11-10 1970-04-20
EP0104981A1 (de) * 1982-09-17 1984-04-04 Merlin Gerin Elektrischer Schalter mit einer ferngesteuerten ruhenden Schaltvorrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430016A (en) * 1966-04-15 1969-02-25 Gen Electric Electric current interrupting device
US3466503A (en) * 1967-06-14 1969-09-09 Gen Electric Assisted arc a.c. circuit interruption
JPS5029864B2 (de) * 1971-09-20 1975-09-26
JPS59215627A (ja) * 1983-05-23 1984-12-05 三菱電機株式会社 開閉器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1050982A (fr) * 1951-03-21 1954-01-12 Siemens Ag Commande à contacteurs en particulier pour installations au fond dans les mines
FR1590945A (de) * 1967-11-10 1970-04-20
EP0104981A1 (de) * 1982-09-17 1984-04-04 Merlin Gerin Elektrischer Schalter mit einer ferngesteuerten ruhenden Schaltvorrichtung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0465694A1 (de) * 1990-07-09 1992-01-15 Siemens Aktiengesellschaft Schalteinrichtung
EP0649156A1 (de) * 1993-10-15 1995-04-19 Schneider Electric Sa Schutzeinrichtung dargestellt durch die Reihenschaltung eines Schutzschalters mit einem Schaltgerät
FR2711271A1 (fr) * 1993-10-15 1995-04-21 Merlin Gerin Appareillage de protection formé par l'association d'un disjoncteur en série avec un effecteur.
US5493264A (en) * 1993-10-15 1996-02-20 Schneider Electric Sa Protection apparatus formed by association of a circuit breaker in series with an effector

Also Published As

Publication number Publication date
US4725911A (en) 1988-02-16
FR2584529B1 (fr) 1995-01-06
JPH0746552B2 (ja) 1995-05-17
JPS6286619A (ja) 1987-04-21
EP0211707B1 (de) 1990-06-13
FR2584529A1 (fr) 1987-01-09
DE3672020D1 (de) 1990-07-19

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