EP0905735A1 - Schutzschalter mit elektromagnetischen Auslöser mit Antrieb für einen beweglichen und gabelförmigen Kontakt - Google Patents

Schutzschalter mit elektromagnetischen Auslöser mit Antrieb für einen beweglichen und gabelförmigen Kontakt Download PDF

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Publication number
EP0905735A1
EP0905735A1 EP98410097A EP98410097A EP0905735A1 EP 0905735 A1 EP0905735 A1 EP 0905735A1 EP 98410097 A EP98410097 A EP 98410097A EP 98410097 A EP98410097 A EP 98410097A EP 0905735 A1 EP0905735 A1 EP 0905735A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
branch
magnetic circuit
circuit
air gap
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
EP98410097A
Other languages
English (en)
French (fr)
Other versions
EP0905735B1 (de
Inventor
Michel Lazareth
Jean-Claude Ramirez
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
Schneider Electric SE
Schneider Electric Industries SAS
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 Schneider Electric SE, Schneider Electric Industries SAS filed Critical Schneider Electric SE
Publication of EP0905735A1 publication Critical patent/EP0905735A1/de
Application granted granted Critical
Publication of EP0905735B1 publication Critical patent/EP0905735B1/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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2418—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures

Definitions

  • the document FR-A-2495826 relates to a known circuit breaker of the kind mentioned, in which the two breaking chambers are separated from each other by a partition insulating.
  • the electromagnetic trip unit includes an electromagnet equipped with a striker which acts directly on the fork of the movable contact to accelerate the movement of the latter towards the open position.
  • the striker is coupled mechanically to a moving core of the magnetic circuit of the electromagnet, and acts on the moving contact after catching a dead stroke. The performance of such circuit breaker remain limited.
  • the object of the invention consists in making a circuit breaker with high ratings and with the power to high cutoff.
  • the upper branch of the circuit magnetic is equipped with two curved extensions extending in parallel according to the direction of the arms of the movable contact so as to frame the two opposite slots of the lower branch.
  • Such a movable fork contact arrangement in the first air gap allows obtain an addition of Laplace elementary forces for rapid opening when the intensity of the current in the pole exceeds a predetermined threshold.
  • the two branches of the magnetic circuit are offset from each other along the axis of movement of the movable contact to obtain an asymmetrical offset of the first air gap making it possible to prolong the effect of the forces of Laplace in the direction of opening.
  • the palette of the magnetic circuit is provided with a first flat part and a second enveloping part arranged in look of the branches at the second air gap to adapt the slope of the curve of force applied to the triggering member.
  • a miniature circuit breaker with high breaking capacity is housed in a housing 10 of molded insulating material, and comprises, by pole, a contact mobile 12 in the form of a fork cooperating with two fixed contacts 14, 16 to constitute a contact bridge with two cut-off intervals connected in series.
  • the mobile contact 12 in fork is actuated by a mechanism 18 of manual control by a lever 20 and automatic via a thermomagnetic trip device.
  • thermomagnetic release On either side of a vertical insulating partition 22 are arranged two chambers arc extinction 24, 26 each consisting of a stack of deionization sheets.
  • the thermomagnetic release includes a bimetal thermal release (not shown), and an electromagnetic trip device with propellant 28 disposed above the arc extinguishing chambers 24, 26.
  • the electromagnetic trip device 28 has a magnetic circuit 30 H-shaped having a first gap 32 for housing the movable contact 12 in fork, and a second air gap 34 cooperating with a pivoting pallet 36 associated with a trigger member 38.
  • the magnetic circuit 30 has two branches side 37, 39 joined by a central branch 41 on which a coil is wound excitation 40 traversed by the current flowing through the pole contacts.
  • the movable contact 12 is provided with a common support arm 12A made of insulating material extending vertically into a central slot 42, provided at the upper part of the first air gap 32, and a conductive fork having two parallel arms 12B, 12C connected to a horizontal core 44.
  • Each arm 12B, 12C extends in the direction vertical inside a slot 46, 48 provided at the bottom of the first air gap 32, and cooperates with a fixed contact 14, 16 while being traversed by the current in directions opposites.
  • the two slots 46, 48 are arranged in the lower branch 39 of the magnetic circuit 30 extending symmetrically with respect to the central slot 42 of the upper branch 37.
  • the conductive core 44 extends in the intermediate horizontal slot of the 'air gap 32, and is located between the two branches 37, 39 being traversed unidirectionally by the total current.
  • the two branches 37, 39 of the magnetic circuit 30 are magnetized according to opposite polarities.
  • the magnetic field lines have the same direction in the horizontal slot of the air gap 32 and act on the current in the core 44, so as to generate Laplace forces intended to propel the movable contact 12 towards the open position. when the intensity of the current exceeds a predetermined threshold.
  • the two other slots 46, 48 are advantageously framed laterally by extensions 50, 52 curved of the upper branch 37 of the magnetic circuit 30.
  • the magnetic fields in the two slots 46, 48 are in opposite directions, and act on opposite currents in the arms 12B, 12C of the fork of the movable contact 12, so as to add the Laplace forces in the direction of the opening.
  • the two branches 38, 39 of a magnetic circuit 30A of the electromagnetic trip unit are offset in the axis of movement of the movable contact 12, so as to obtain an asymmetrical offset of the first air gap 32.
  • the magnetic flux passing through the latter acts on the movable contact 12 on a more great length, so as to prolong the effect of the Laplace force in the direction of the opening.
  • the magnetic circuit 30B at H of the trigger electromagnetic comprises in the second air gap 34 a pivoting pallet 36 composed of a first flat part 36A and a second enveloping part 36B.
  • the distribution of the surfaces between the two parts 36A, 36B makes it possible to adjust with precision the response slope of the force curve acting on the trigger 38 of Figure 1.
  • the relative width of the first flat part 36A will be weaker compared to the second enveloping part 36B.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
EP19980410097 1997-09-24 1998-09-04 Schutzschalter mit elektromagnetischen Auslöser mit Antrieb für einen beweglichen und gabelförmigen Kontakt Expired - Lifetime EP0905735B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9712091A FR2768856B1 (fr) 1997-09-24 1997-09-24 Disjoncteur a declencheur electromagnetique a propulseur d'un contact mobile a fourche
FR9712091 1997-09-24

Publications (2)

Publication Number Publication Date
EP0905735A1 true EP0905735A1 (de) 1999-03-31
EP0905735B1 EP0905735B1 (de) 2006-04-12

Family

ID=9511587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980410097 Expired - Lifetime EP0905735B1 (de) 1997-09-24 1998-09-04 Schutzschalter mit elektromagnetischen Auslöser mit Antrieb für einen beweglichen und gabelförmigen Kontakt

Country Status (4)

Country Link
EP (1) EP0905735B1 (de)
DE (1) DE69834159T2 (de)
ES (1) ES2259451T3 (de)
FR (1) FR2768856B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108321058A (zh) * 2018-02-28 2018-07-24 首瑞（天津）电气设备有限公司 一种电磁脱扣断路器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011008832A1 (de) * 2011-01-19 2012-07-19 Abb Ag Installationsschaltgerät

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0053973A1 (de) * 1980-12-09 1982-06-16 Merlin Gerin Kleinselbstschalter mit hohem Schaltvermögen
US4656446A (en) * 1985-12-17 1987-04-07 Westinghouse Electric Corp. Current limiting circuit breaker with series double break contact system per pole
EP0635859A1 (de) * 1993-07-19 1995-01-25 Schneider Electric Sa Lastschalter mit einem Bedienungsmechanismus welcher durch einen elektromagnetische Auslöser gesteuert wird
EP0693764A1 (de) * 1994-07-18 1996-01-24 Schneider Electric Sa Elektrischer Lastschalter mit elektromagnetischem Betätiger für Hochstrom
EP0693765A1 (de) * 1994-07-18 1996-01-24 Schneider Electric Sa Elektromagnetischer Auslöser für einen Niederspannungsschutzschalter
DE4445419A1 (de) * 1994-12-20 1996-06-27 Abb Patent Gmbh Elektrisches Installationsgerät, insbesondere Leitungsschutzschalter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0053973A1 (de) * 1980-12-09 1982-06-16 Merlin Gerin Kleinselbstschalter mit hohem Schaltvermögen
US4656446A (en) * 1985-12-17 1987-04-07 Westinghouse Electric Corp. Current limiting circuit breaker with series double break contact system per pole
EP0635859A1 (de) * 1993-07-19 1995-01-25 Schneider Electric Sa Lastschalter mit einem Bedienungsmechanismus welcher durch einen elektromagnetische Auslöser gesteuert wird
EP0693764A1 (de) * 1994-07-18 1996-01-24 Schneider Electric Sa Elektrischer Lastschalter mit elektromagnetischem Betätiger für Hochstrom
EP0693765A1 (de) * 1994-07-18 1996-01-24 Schneider Electric Sa Elektromagnetischer Auslöser für einen Niederspannungsschutzschalter
DE4445419A1 (de) * 1994-12-20 1996-06-27 Abb Patent Gmbh Elektrisches Installationsgerät, insbesondere Leitungsschutzschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108321058A (zh) * 2018-02-28 2018-07-24 首瑞（天津）电气设备有限公司 一种电磁脱扣断路器

Also Published As

Publication number Publication date
ES2259451T3 (es) 2006-10-01
DE69834159T2 (de) 2007-01-04
EP0905735B1 (de) 2006-04-12
DE69834159D1 (de) 2006-05-24
FR2768856A1 (fr) 1999-03-26
FR2768856B1 (fr) 1999-11-12

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