EP0649156A1 - Schutzeinrichtung dargestellt durch die Reihenschaltung eines Schutzschalters mit einem Schaltgerät - Google Patents

Schutzeinrichtung dargestellt durch die Reihenschaltung eines Schutzschalters mit einem Schaltgerät Download PDF

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Publication number
EP0649156A1
EP0649156A1 EP94410087A EP94410087A EP0649156A1 EP 0649156 A1 EP0649156 A1 EP 0649156A1 EP 94410087 A EP94410087 A EP 94410087A EP 94410087 A EP94410087 A EP 94410087A EP 0649156 A1 EP0649156 A1 EP 0649156A1
Authority
EP
European Patent Office
Prior art keywords
electrode
switch circuit
circuit breaker
fixed contact
circuit
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
EP94410087A
Other languages
English (en)
French (fr)
Other versions
EP0649156B1 (de
Inventor
Alain Schneider Electric Sa Menier
Eric Schneider Electric Sa Domejean
Alain Schneider Electric Sa Frolla
Jean-Jacques Schneider Electric Sa Nardin
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 EP0649156A1 publication Critical patent/EP0649156A1/de
Application granted granted Critical
Publication of EP0649156B1 publication Critical patent/EP0649156B1/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
    • H01H9/30—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
    • 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
    • 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

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 is automatically bypassed when the arc is switched to the lower arc horn, which is permanently at the potential of the input terminal. To obtain rapid arc switching, it is necessary to bring the connecting conductor extending the arc horn as close as possible to form the shunt circuit.
  • the proximity effect of this conductor favors the switching of the arc resulting in rapid protection of the effector, but poses problems of dielectric strength when the contacts of the circuit breaker are closed and the switch is in the open state.
  • the switch is connected between the triggers and the output terminal, and the two arc guide horns are connected respectively to the input terminal and to the output terminal. In the event of a fault, the shunting of the switch is established with delay, because it is necessary to wait for the opening limit switch of the moving contact of the circuit breaker to obtain switching of the arc on the guide horn located at the potential of the output terminal.
  • the object of the invention is to improve the protection and the dielectric strength of a circuit breaker and effector equipment.
  • the isolation interval is composed of a first air space located between the lower part of the fixed contact and the electrode in the form of a half-loop, and of an intermediate wall in rigid insulating material serving as a support for the fixed contact, said wall extending opposite the movable contact between the fixed contact and a conductive branch extending the electrode towards the end of the coil.
  • 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 the electrode 38 by an isolation interval 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 thermal trip device 26, the contacts 22, 20 of the first switch circuit 16, the first connection area 50, the conductor 60, the contacts of the second switch circuit 18, the conductor 62, the second connection area 52, and then crosses the coil 34 of the electromagnetic trip device 36 for 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 triggering of the mechanism 43 by the action of the electromagnetic trigger 36 or the thermal trigger 26 electrically connected in series with an effector ( 14).
  • the switching of the arc on an electrode (38) when the mechanism is triggered following a fault causes the shunt of the effector (14).
  • the electrode (38) is separated from the fixed contact (20) by an isolation gap (42), which is dimensioned to favor said switching of the arc on the electrode (38) at the start of the opening stroke. of the movable contact (22), and to guarantee the dielectric strength in the closed state of the contacts (20, 22, the tripping member 44 of the electromagnetic trip device 36 then maintains the movable contact 22 in the open state until extinction of the arc.
  • FIG. 3 shows the circuit breaker 12 in the closed position.
  • the same reference numbers will be used to designate parts similar to those in 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 input and 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 Bl in the formation 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.
  • 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 effector 214 is connected in series 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

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP94410087A 1993-10-15 1994-10-11 Schutzeinrichtung dargestellt durch die Reihenschaltung eines Schutzschalters mit einem Schaltgerät Expired - Lifetime EP0649156B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312407A FR2711271B1 (fr) 1993-10-15 1993-10-15 Appareillage de protection formé par l'association d'un disjoncteur en série avec un effecteur.
FR9312407 1993-10-15

Publications (2)

Publication Number Publication Date
EP0649156A1 true EP0649156A1 (de) 1995-04-19
EP0649156B1 EP0649156B1 (de) 1999-07-28

Family

ID=9451956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94410087A Expired - Lifetime EP0649156B1 (de) 1993-10-15 1994-10-11 Schutzeinrichtung dargestellt durch die Reihenschaltung eines Schutzschalters mit einem Schaltgerät

Country Status (5)

Country Link
US (1) US5493264A (de)
EP (1) EP0649156B1 (de)
DE (1) DE69419690T2 (de)
ES (1) ES2136183T3 (de)
FR (1) FR2711271B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5614878A (en) * 1995-09-07 1997-03-25 Siemens Energy & Automation, Inc. Two pole remote controlled circuit breaker
FR2846478B1 (fr) * 2002-10-25 2004-12-24 Schneider Electric Ind Sas Dispositif de protection contre les surtensions a electrode mobile
CN102543606A (zh) * 2012-01-19 2012-07-04 江苏普华力拓电器股份有限公司 一种微型断路器

Citations (4)

* 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
EP0211707A1 (de) * 1985-07-04 1987-02-25 Merlin Gerin Elektrischer Schaltschutz für Kondensatoranlagen
JPH01298622A (ja) * 1988-05-26 1989-12-01 Matsushita Electric Works Ltd 回路遮断器
EP0350825A2 (de) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Elektrisches Schaltgerät

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL119357B (de) * 1940-04-23
US4456832A (en) * 1979-01-08 1984-06-26 Southern California Edison Company Circuit breaker control device
FR2535520A1 (fr) * 1982-11-03 1984-05-04 Merlin Gerin Appareil de coupure de courant telecommande
JPH02100230A (ja) * 1988-10-06 1990-04-12 Mitsubishi Electric Corp 遠隔操作式回路遮断器

Patent Citations (4)

* 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
EP0211707A1 (de) * 1985-07-04 1987-02-25 Merlin Gerin Elektrischer Schaltschutz für Kondensatoranlagen
JPH01298622A (ja) * 1988-05-26 1989-12-01 Matsushita Electric Works Ltd 回路遮断器
EP0350825A2 (de) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Elektrisches Schaltgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 89 (E - 0891) 19 February 1990 (1990-02-19) *

Also Published As

Publication number Publication date
DE69419690T2 (de) 2000-04-06
DE69419690D1 (de) 1999-09-02
US5493264A (en) 1996-02-20
ES2136183T3 (es) 1999-11-16
EP0649156B1 (de) 1999-07-28
FR2711271B1 (fr) 1995-12-22
FR2711271A1 (fr) 1995-04-21

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