EP0410257A1 - Interrupteur électromécanique d'ouverture rapide - Google Patents

Interrupteur électromécanique d'ouverture rapide Download PDF

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Publication number
EP0410257A1
EP0410257A1 EP90113582A EP90113582A EP0410257A1 EP 0410257 A1 EP0410257 A1 EP 0410257A1 EP 90113582 A EP90113582 A EP 90113582A EP 90113582 A EP90113582 A EP 90113582A EP 0410257 A1 EP0410257 A1 EP 0410257A1
Authority
EP
European Patent Office
Prior art keywords
magnet
switch according
quick switch
switching path
magnetic
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.)
Withdrawn
Application number
EP90113582A
Other languages
German (de)
English (en)
Inventor
Fritz Dipl.-Phys. Pohl
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0410257A1 publication Critical patent/EP0410257A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/06—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electromagnetic opening
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening

Definitions

  • the invention relates to an electromechanical quick switch with a movable switch contact, which is assigned at least one magnetic drive with a U-shaped magnetic yoke.
  • the switching path is arranged in a switching chamber which contains arc rails and an extinguishing device.
  • a known embodiment of an electromechanical high-speed switch contains a magnetic drive for the movable switch contact with a magnetic yoke, the legs of which form a slot in which the movable switch contact is arranged.
  • the middle leg is provided with a magnetic coil.
  • the magnetic drive is arranged in a switching chamber that contains quenching plates.
  • the switching path is arranged outside the magnetic yoke.
  • This magnetic drive therefore has practically no influence on the movement of the arc.
  • the solenoid is arranged in series with the switching path and carries the main current. Given the correspondingly large cross section of the turns, this coil therefore requires a relatively large amount of space and has a high power loss (DE-AS 23 60 439).
  • the invention is based on the object of designing this known switch in such a way that it achieves good current limitation with small forward currents in the event of medium-sized short-circuits and makes it easier to switch off large prospective short-circuit currents.
  • the opened contacts form a current loop with the arc, the Lorentz force of which drives the arc over the arc guide rails into the quenching device, which generally consists of quenching plates.
  • the switching path is located in the air gap of the side legs of the first magnetic yoke. Due to the stray field of this magnetic yoke the arc also accelerates.
  • the feed line to the switching path forms at least one, preferably a plurality of turns around the common leg of the magnet yokes.
  • the end of the supply line to the fixed contact can preferably be designed as a running rail.
  • the magnet armature can consist of a plate, for example an iron plate, which is arranged in the stray field of the pole faces of the second magnet yoke.
  • the beveled pole faces of the legs of the second magnet yoke each form an air gap with the adapted end faces of the magnet armature.
  • the movable contact can consist of a contact bridge, each of which forms a switching path with two fixed contacts, each of which is assigned a magnetic drive with two U-shaped magnet yokes according to the invention, and each of which is provided with a magnet armature for moving the contact bridge are.
  • the two magnet armatures can also act on the contact bridge via a common drive element.
  • the two magnetic drives can also be provided with a common magnet armature.
  • FIG. 1 schematically illustrates a longitudinal section through a rapid switch according to the invention.
  • FIG. 2 shows a cross section of the magnetic drive of the embodiment according to FIG. 1.
  • a switching path 2 is arranged in a switching chamber 4, which is only indicated as a dash-dotted outline, and which contains a fixed contact 6 and a movable contact 10, rails 12 and 13 and an extinguishing device 14, which generally consists of quenching plates.
  • the running rail 13 connected to the fixed contact 6 can preferably consist of the end of the feed line 8, which forms a current loop with a central conductor piece 7 and the fixed contact 6.
  • a magnet armature 16 made of magnetizable material, which is pivotably mounted about an axis of rotation 17 and is held in a rest position by a spring 18 as long as no short-circuit current occurs.
  • the current loop from the fixed contact 6, the conductor piece 7 and the feed line 8 surrounds the upper and lower flat side and the left side surface of the common middle leg 22 of two magnet yokes 20 and 21.
  • the two lateral legs of the magnetic yoke 20 form an air gap 28 in which the fixed contact 6 and the movable contact 10 and thus the switching path 2 are arranged.
  • the lateral legs 23 and 24 run parallel to the plane of movement 11 of the movable contact 10 indicated by dash-dotted lines in the figure.
  • the feed line 8 is arranged between the lateral legs 25 and 26 of the magnetic yoke 21.
  • the inclination of the pole faces and the end faces can preferably be chosen such that the opening angle ⁇ is approximately 90 ° is.
  • the magnet armature 16 is penetrated by the flux of the magnet yoke 21, attracted and pivoted about the axis of rotation 17. He moves the drive element 19 abruptly the movable contact 10, which is pivotally mounted about an axis of rotation 34.
  • a flexible supply line for the movable contact 10 is indicated schematically in the figure and designated 36.
  • the air gaps 31 and 32 can, for example, have a clear width of approximately 3 mm; the stray field of the magnetic yoke 21 is accordingly correspondingly small and short tripping times are achieved.
  • a high-speed switch with a nominal current of 200 A with a magnetic armature 16 made of solid iron with an armature mass of, for example, 18 g and an armature length of, for example, 40 mm, and with air gaps 31 and 32 of approximately 3 mm each and an outer diameter of 18 mm and a diameter of the feed line 8 of, for example, 7.5 mm, the maximum force of the drive element 19 is approximately 400 N and the response current is approximately 400 A rms .
  • a tripping time of about 0.7 ms is obtained with a prospective short-circuit current of 25 kA.
  • a segment angle ⁇ of the magnet armature 16 of approximately 90 ° is preferably selected, as a result of which the armature mass is reduced by approximately half compared to the embodiment shown, but the armature force, however, only decreases by approximately a factor of ⁇ 2.
  • the length, the outside and inside diameter of the magnet armature 16 and, if appropriate, a laminated design of this magnet armature 16 make possible further optimization.
  • a 63 A limiter which limits a prospective short-circuit current of 6 kA to a forward current of, for example, 3 kA.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP90113582A 1989-07-26 1990-07-16 Interrupteur électromécanique d'ouverture rapide Withdrawn EP0410257A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3924781 1989-07-26
DE3924781 1989-07-26

Publications (1)

Publication Number Publication Date
EP0410257A1 true EP0410257A1 (fr) 1991-01-30

Family

ID=6385910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113582A Withdrawn EP0410257A1 (fr) 1989-07-26 1990-07-16 Interrupteur électromécanique d'ouverture rapide

Country Status (1)

Country Link
EP (1) EP0410257A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515292A1 (fr) * 1991-05-21 1992-11-25 Schneider Electric Sa Déclencheur électromagnétique pour un disjoncteur électrique à bas calibres
FR2722608A1 (fr) * 1994-07-18 1996-01-19 Schneider Electric Sa Propulseur electromagnetique de disjoncteur basse tension
FR2756414A1 (fr) * 1996-11-25 1998-05-29 Schneider Electric Sa Appareil interrupteur electromagnetique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2135557A1 (de) * 1971-07-16 1973-01-25 Bbc Brown Boveri & Cie Elektrodynamische ausloesevorrichtung
FR2185853A1 (fr) * 1972-05-26 1974-01-04 Merlin Gerin
US3815059A (en) * 1972-12-01 1974-06-04 Westinghouse Electric Corp Circuit interrupter comprising electromagnetic opening means
DE3328526A1 (de) * 1983-08-06 1985-02-21 Brown, Boveri & Cie Ag, 6800 Mannheim Klappanker-system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2135557A1 (de) * 1971-07-16 1973-01-25 Bbc Brown Boveri & Cie Elektrodynamische ausloesevorrichtung
FR2185853A1 (fr) * 1972-05-26 1974-01-04 Merlin Gerin
US3815059A (en) * 1972-12-01 1974-06-04 Westinghouse Electric Corp Circuit interrupter comprising electromagnetic opening means
DE3328526A1 (de) * 1983-08-06 1985-02-21 Brown, Boveri & Cie Ag, 6800 Mannheim Klappanker-system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515292A1 (fr) * 1991-05-21 1992-11-25 Schneider Electric Sa Déclencheur électromagnétique pour un disjoncteur électrique à bas calibres
FR2676860A1 (fr) * 1991-05-21 1992-11-27 Merlin Gerin Declencheur electromagnetique pour un disjoncteur electrique a bas calibres.
FR2722608A1 (fr) * 1994-07-18 1996-01-19 Schneider Electric Sa Propulseur electromagnetique de disjoncteur basse tension
EP0693765A1 (fr) 1994-07-18 1996-01-24 Schneider Electric Sa Propulseur électromagnétique de disjoncteur basse tension
AU686809B2 (en) * 1994-07-18 1998-02-12 Schneider Electric Sa An electromagnetic actuator for a low voltage circuit breaker
FR2756414A1 (fr) * 1996-11-25 1998-05-29 Schneider Electric Sa Appareil interrupteur electromagnetique

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