EP0649157A1 - Elektrischer Schutzvorrichtung mit Lastschalter und Effektor - Google Patents

Elektrischer Schutzvorrichtung mit Lastschalter und Effektor Download PDF

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Publication number
EP0649157A1
EP0649157A1 EP94410088A EP94410088A EP0649157A1 EP 0649157 A1 EP0649157 A1 EP 0649157A1 EP 94410088 A EP94410088 A EP 94410088A EP 94410088 A EP94410088 A EP 94410088A EP 0649157 A1 EP0649157 A1 EP 0649157A1
Authority
EP
European Patent Office
Prior art keywords
effector
circuit
circuit breaker
electrode
arc
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
EP94410088A
Other languages
English (en)
French (fr)
Other versions
EP0649157B1 (de
Inventor
François Reynaud
Bernard Lepretre
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.)
Schneider Electric Industries SAS
Original Assignee
Merlin Gerin SA
Schneider Electric SE
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, Schneider Electric SE filed Critical Merlin Gerin SA
Publication of EP0649157A1 publication Critical patent/EP0649157A1/de
Application granted granted Critical
Publication of EP0649157B1 publication Critical patent/EP0649157B1/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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/121—Protection of release mechanisms
    • 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
    • H01H2089/065—Coordination between protection and remote control, e.g. protection job repartition, mutual assistance or monitoring
    • 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 effector is formed by a static switch connected in series with the contacts of the circuit breaker.
  • the switch is connected between the fixed contact and the input terminal, while the movable contact is connected to the output terminal via the thermal trip device, and the electromagnetic trip device.
  • the switch remains energized in the open state of the contacts of the circuit breaker, and the releases, in particular the coil of the electromagnetic release, are shunted when the arc switches on the two guide horns of the arc extinguishing chamber.
  • the switch is connected between the triggers and the output terminal, and the two guide horns are connected respectively to the input terminal and to the output terminal.
  • the object of the invention is to improve the protection and safety of a circuit breaker and effector apparatus.
  • the switching electrode is in electrical connection with one of the ends of the control coil of the electromagnetic trip device, the other end being connected to the output terminal so as to maintain the excitation of the coil during the shunting phase of the effector.
  • the movable contact In the case of an electromagnetic trip device with striker, the movable contact remains blocked in the open position by the striker throughout the phase of elimination of the fault until the arc extinguishes.
  • an electrical protection device 10 is formed by the association of a circuit breaker 12 with a remotely operated effector 14.
  • the circuit breaker 12 includes a first switch circuit 16 electrically connected in series with a second switch circuit 18 of the effector 14.
  • the first switch circuit 16 of the circuit breaker comprises a fixed contact 20 cooperating with a movable contact 22, which is connected by a braid 24 to a bimetallic strip of a thermal trip device 26.
  • the foot of the bimetallic strip is connected to an input terminal 28, and a first arc guide horn 30.
  • the output terminal 32 is connected to one of the ends 34b of a coil 34 of an electromagnetic trip device 36, the other end 34a being at the potential of a switching electrode 38, and of a second horn 40 of arc guidance.
  • the fixed contact 20 is electrically isolated from the coil 34 and from the electrode 38 by an isolation gap 42.
  • the electromagnetic trip device 36 is provided with a triggering member 44 arranged to ensure the triggering of the mechanism 43 during the appearance of a short-circuit current, and to play the role of a striker propelling the movable contact 22 towards the open position.
  • the two horns 30, 40 frame an arc extinguishing chamber 45 which is formed by a stack of deionization sheets.
  • the second switch circuit 18 of the effector 14 is connected to a pair of connection terminals 46, 48 so as to be electrically connected to the fixed contact 20 by a first connection pad 50, and to the end 34b of the coil 34 by a second connecting pad 52.
  • the actuation of the contacts of the second switch circuit 18 is operated by a control member 54 for example of the electromagnet type connected to terminals 56, 58 control auxiliaries.
  • the two pads 50, 52 are respectively connected to the connection terminals 46, 48 of the effector 14 by a pair of conductors 60, 62.
  • the effector 14 may be constituted either by a remote control switch, or by an electromechanical or static contactor, or by any other electrical endurance device, with the placing of its second switch circuit 18 in series in the main circuit of the circuit breaker 12.
  • the current enters the switchgear 10 through the input terminal 28, flows successively in the bimetallic strip of the trip device thermal 26, the contacts 22, 20 of the first switch circuit 16, the first connection pad 50, the conductor 60, the contacts of the second switch circuit 18, the conductor 62, the second link pad 52, and then crosses the coil 34 of the electromagnetic trip device 36 to exit the apparatus 10 through the output terminal 32.
  • each control pulse applied to the terminals 56, 58 causes a change of state of the second switch circuit 18. If the effector 14 is constituted by a contactor, the second switch circuit 18 is permanently in the closed state in the presence of a maintained control signal. The contactor opens automatically as soon as the control signal disappears.
  • the appearance of a short-circuit or overcurrent current downstream of the output terminal 32 causes the automatic activation of the mechanism 43 by the action of the electromagnetic trip 36 or the thermal trip 26 of the circuit breaker 12.
  • the resulting arc of the separation of the contacts 20, 22 develops in the arc-forming chamber, and quickly migrates to the switching electrode 38, so as to shunt the effector 14 to protect it from the effects of the fault current.
  • the coil 34 of the electromagnetic trip device 36 continues to be supplied by the arcing current following the shunting of the effector 14, and this, throughout the fault elimination phase.
  • the striker of the triggering member 44 of the electromagnetic trigger 36 then maintains the movable contact 22 in the open state until the arc extinguishes.
  • Figure 3 shows the circuit breaker 12 in the closed position.
  • the same reference numbers will be used to designate parts similar to those of FIG. 2.
  • the movable contact 22 is carried by a contact arm 64 pivotally mounted on an axis 66.
  • the areas 50, 52 of the effector 14 are connected respectively to the fixed contact 20, and to the end 34a of the coil 34 which is at the potential of the switching electrode 38.
  • the presence of the isolation gap 42 guarantees the holding of the isolation between the entrance and the output of the effector 14 when the contacts 20, 22 of the first switch circuit 16 are in the closed position, while the second switch circuit 18 is in the open state.
  • FIGS. 4 and 5 The migration of the arc on the switching electrode 38 is shown in detail in FIGS. 4 and 5.
  • the arc is established along the path AB between the fixed contact 20 and the movable contact 22.
  • the effector 14 always remains electrically inserted in series in the main circuit of the circuit breaker 12.
  • FIG. 5 shows the development of the arc A1 B1 in the training chamber 68, just before it enters the extinguishing chamber 45. It is noted that the coil 34 of the electromagnetic trip device remains supplied by the fault current as long as the arc travels along the switching electrode 38.
  • the isolation gap 42 is composed of a first air space 70 arranged between the lower part of the fixed contact 20 and the electrode 38 shaped as half-loop, and an intermediate wall 72 of rigid insulating material serving as a support for the fixed contact 20.
  • the wall 72 is produced by molding with the plastic housing 74 of the circuit breaker 12, and extends opposite the movable contact 22 between the fixed contact 20 and a conductive branch 76 connecting the electrode 38 to the end 34a of the coil 34.
  • the shape of the electrode 38 is adapted to favor the migration of the arc root during the fault breaking phase, while guaranteeing the dielectric strength when the circuit breaker is closed.
  • the electrode 38 is equipped with a rectilinear face 78 arranged in the extension of the plane of the patch of the fixed contact 20.
  • the face 78 can also be curved to project from the plane of the fixed contact 20.
  • the variant of FIG. 7 relates to a bipolar apparatus 100 formed by the association of a unipolar and neutral circuit breaker 102 and a bipolar effector 104.
  • the phase circuit L with its triggers 126 and 136 is identical to the diagram in FIG. 2, the marks of the same parts being assigned a number 1 at the hundred.
  • the operation of the phase circuit L of the apparatus 100 has the same advantages as that described above.
  • the neutral circuit N the marks of similar parts are assigned a number 2 at the hundred level.
  • the circuit breaker part of the neutral circuit N is not protected, and is therefore devoid of trip devices.
  • the input terminal 228 is connected by the braid 224 to the movable contact 222, and the guide horn assembly 240 and the electrode 238 is connected directly to the output terminal 232.
  • connection pad 250 is connected to the fixed contact 220, while the other connection pad 252 is connected to the guide horn 240.
  • the placing of the effector 214 in series takes place between the fixed contact 220 and the switching electrode 238.
  • the two parts 114, 214 of the bipolar effector 104 are thus de-energized when the contacts 120, 220; 122, 222 of the circuit breaker 102 are open.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Thermally Actuated Switches (AREA)
EP94410088A 1993-10-15 1994-10-11 Elektrischer Schutzvorrichtung mit Lastschalter und Effektor Expired - Lifetime EP0649157B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312406A FR2711270B1 (fr) 1993-10-15 1993-10-15 Appareillage de protection électrique à disjoncteur et effecteur.
FR9312406 1993-10-15

Publications (2)

Publication Number Publication Date
EP0649157A1 true EP0649157A1 (de) 1995-04-19
EP0649157B1 EP0649157B1 (de) 1999-12-15

Family

ID=9451955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94410088A Expired - Lifetime EP0649157B1 (de) 1993-10-15 1994-10-11 Elektrischer Schutzvorrichtung mit Lastschalter und Effektor

Country Status (6)

Country Link
US (1) US5539365A (de)
EP (1) EP0649157B1 (de)
CN (1) CN1045686C (de)
DE (1) DE69422134T2 (de)
ES (1) ES2140517T3 (de)
FR (1) FR2711270B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2753001A1 (fr) * 1996-09-04 1998-03-06 Legrand Sa Interrupteur commande et protege, tel que telerupteur ou contacteur
CN102347177A (zh) * 2011-09-19 2012-02-08 广东天富电气集团有限公司 一种热磁型断路器的工作方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980054544U (ko) * 1996-12-31 1998-10-07 이종수 배선용 차단기의 소호장치
FR2832559B1 (fr) * 2001-11-16 2004-01-16 Schneider Electric Ind Sa Module de commande et de protection d'un appareil interrupteur
DE10324390A1 (de) * 2003-05-30 2004-12-23 Abb Patent Gmbh Elektrische Auslöseeinrichtung für einen elektrischen Schalter
CN111919276A (zh) * 2018-03-28 2020-11-10 松下知识产权经营株式会社 电路切断装置
CN111755299B (zh) * 2019-03-29 2022-07-05 Ls产电株式会社 配线用断路器的灭弧装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104981A1 (de) * 1982-09-17 1984-04-04 Merlin Gerin Elektrischer Schalter mit einer ferngesteuerten ruhenden Schaltvorrichtung
EP0204594A1 (de) * 1985-05-06 1986-12-10 Telemecanique Gegen Kurzschlussströme geschütztes Schaltgerät
FR2584529A1 (fr) * 1985-07-04 1987-01-09 Merlin Gerin Disjoncteur-contacteur electrique, notamment pour des batteries de condensateurs

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616206A (en) * 1984-09-07 1986-10-07 Eaton Corporation Circuit breaker and shunt trip apparatus combined within single pole device
US4654614A (en) * 1985-03-04 1987-03-31 Westinghouse Electric Corp. Current limiting solenoid operated circuit breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104981A1 (de) * 1982-09-17 1984-04-04 Merlin Gerin Elektrischer Schalter mit einer ferngesteuerten ruhenden Schaltvorrichtung
EP0204594A1 (de) * 1985-05-06 1986-12-10 Telemecanique Gegen Kurzschlussströme geschütztes Schaltgerät
FR2584529A1 (fr) * 1985-07-04 1987-01-09 Merlin Gerin Disjoncteur-contacteur electrique, notamment pour des batteries de condensateurs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2753001A1 (fr) * 1996-09-04 1998-03-06 Legrand Sa Interrupteur commande et protege, tel que telerupteur ou contacteur
CN102347177A (zh) * 2011-09-19 2012-02-08 广东天富电气集团有限公司 一种热磁型断路器的工作方法

Also Published As

Publication number Publication date
EP0649157B1 (de) 1999-12-15
CN1045686C (zh) 1999-10-13
FR2711270A1 (fr) 1995-04-21
US5539365A (en) 1996-07-23
FR2711270B1 (fr) 1995-11-24
DE69422134D1 (de) 2000-01-20
CN1106162A (zh) 1995-08-02
ES2140517T3 (es) 2000-03-01
DE69422134T2 (de) 2000-06-15

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