EP1276125A2 - Disjoncteur - Google Patents

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Publication number
EP1276125A2
EP1276125A2 EP02013162A EP02013162A EP1276125A2 EP 1276125 A2 EP1276125 A2 EP 1276125A2 EP 02013162 A EP02013162 A EP 02013162A EP 02013162 A EP02013162 A EP 02013162A EP 1276125 A2 EP1276125 A2 EP 1276125A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
opening
breaker according
switching
gas
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Withdrawn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
EP02013162A
Other languages
German (de)
English (en)
Other versions
EP1276125A3 (fr
Inventor
Gerald Dr. Andre
Jörg Teichmann
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
Priority claimed from DE2001131018 external-priority patent/DE10131018C1/de
Priority claimed from DE2002104042 external-priority patent/DE10204042B4/de
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1276125A2 publication Critical patent/EP1276125A2/fr
Publication of EP1276125A3 publication Critical patent/EP1276125A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow

Definitions

  • the invention relates to a circuit breaker, in particular in the area of the medium voltage level, with each other relatively movable contacts and a gas for insulation purposes, according to the preamble of claim 1.
  • Short circuit currents are used in circuit breakers directly in a gas filled with high dielectric strength, gas-tight container of a switchgear are integrated.
  • the insulating gas is low Overpressure, as is the case in standard switchgear is used, and can equally as the extinguishing medium of Circuit breaker can be used.
  • Such switches are generally inexpensive to produce. Since the switches usually have a relatively low gas pressure are operated, however, their space is comparatively large.
  • switches of the latter type A method of separation a moving arc between two contacts of a gas is described, for example, in EP 0 313 106 A2 or in described in DE 196 31 817 C1 and there using figures shown.
  • the switching arc commutates there after Separate the contacts in a quenching coil in which the Arc driven by the magnetic field of the quenching coil performs a rotational movement. Through this movement Energy is withdrawn from the arc and it occurs naturally Zero current crossing to extinguish the switching arc. contacts and quenching coil are open in the container with these switches attached to the switchgear, so that the installation space accordingly is large.
  • a specific embodiment of these switches are so-called Auto expansion switch, such as in EP 0 932 176 A1 or in EP 0 277 848 A1.
  • the arc burns in a closed volume, which is limited by an insulating housing.
  • This insulating housing is usually referred to as a switching chamber.
  • the switching chamber has outflow openings through which the Switching arc to discharge heated gas from the switching chamber can. This flow out of the switching chamber cools the Arc and leads in the natural zero current to Extinguishing the arc.
  • They also have auto expansion switches Means for generating magnetic fields such as coils or permanent magnets. These magnetic fields move the Arc on a rotation path.
  • the rotation track separates the volume of the switching chamber in two partial volumes, one of which one inside, one outside the rotation path.
  • the outflow openings described are on all principle based switches within the rotation path described by the arc. Otherwise it is the switching chamber hermetically with the exception of these openings locked.
  • This arrangement of the outflow opening during the switching process can be from plasma physical as well thermodynamic reasons never gas from outside the Volume in the extinguishing chamber penetrate into the chamber.
  • the Gas density inside the switch chamber increases during a shutdown inevitably from. So with the natural current zero crossing there is still a residual gas density, which is the dielectric Ensures the strength of the switching path the output volume of the switching chamber must be sufficiently large. This requires a large installation space for the switching chamber and thus an equally large installation space for the entire switchgear.
  • the object of the invention is through the features of the claim 1 solved. Further training is in the dependent Claims specified.
  • the invention includes the introduction of at least one additional one Opening in the housing outside the rotation path of the Arc of an autocompression chamber known from the prior art, by now during the switch-off process the gas from the gas compartment of the switchgear into the volume can flow into the interrupter.
  • the relevant ones physical phenomena can be described as follows:
  • the gas is also turned in by the rotating arc Rotation offset and pushed outwards by centrifugal forces. This creates a pressure gradient, which in near the outer wall, i.e. with larger radii, an overpressure arises while near the contacts, i.e. at Smaller radii create a vacuum. Because of this negative pressure will gas from outside the interrupter through the above described opening in the gas space, which is outside the rotation path of the arc is sucked. This will make the Amount of gas in this room and the mean pressure increased. at Reduction of the current or reduced in the current zero crossing the driving force on the arc, causing the rotation of the arc is reduced. At zero current falls the drive of the arc, which causes the gas to rotate holds completely away.
  • the additional opening according to the invention is advantageous the mean pressure in the switching chamber increases. This improves the blow-out effect or can smaller design has the same blow-out effect as with chambers can be achieved without appropriate openings.
  • the cross section is an example in connection with auto-compression switches known per se Switch chamber 10 shown.
  • the switching chamber 10 encloses a volume 100 and is made of a housing 104 made of insulating material educated.
  • a movable contact 101 and a fixed contact 102 are located within the switching chamber 10 there is a movable contact 101 and a fixed contact 102, below which an element 103 for generating magnetic fields is arranged.
  • the magnetic field generating element 103 can for example by a coil or a permanent magnet be educated.
  • the magnetic field generating element 103 is displaced during the switch-off process the arc 106 by the Lorentz force in a rotational movement.
  • the rotating arc 106 separates with its arc path, the gas volume 100 of the quenching chamber in two thermally separated partial volumes 120 and 130.
  • the one Partial volume 130 lies within, the other partial volume 120 outside the arc.
  • the partial volume 120 is remote from the axis and the partial volume 130 oriented near the axis.
  • the fixed contact 102 on the bottom of the housing 104 saves for the partial volume 130 has an opening within the arc path 105 from which during the switch-off process by the Arc 106 heated gas from existing in the switching chamber 10 Gas volume 100 can flow out.
  • the switching chamber 10 is part of a switchgear assembly with an in the gas boiler not shown in detail with Gas volume 200, in which the flowing out of the switching chamber 10 Gas is absorbed. In this regard, as a gas exchange instead of.
  • the movable contact 101 which is used to disconnect the circuit from a switch position "On" by the galvanic contact determined by moving and fixed contact surfaces can, by a lifting movement in a switch position To be moved "off".
  • the moving contact 101 can be used as Round rod or bolt or be designed as a tube.
  • FIG. 1 is located in the cover 109 of the interrupter housing 104 an additional opening 107.
  • the opening 107 is in Form of a concentrically arranged around the movable contact 101 Annular gap through which during the rotation of the Arc gas from the environment 200 outside the switching chamber can be sucked trained.
  • the annular opening 107 in Figure 1 is outward advantageously as a funnel 108 with bevels in the Cover wall 109 formed. This allows the gas that comes with The speed of sound flows into the Switching chamber 10 are introduced.
  • FIG. 2 shows an exemplary embodiment modified compared to FIG. 1, where the additional opening as a discrete Opening 207 is formed in the cover 208 of the switching chamber 100 is. There may be several such openings.
  • the passage of the movable contact 201 through the lid In this case, 208 is made gas-tight.
  • the contact pin 101 there is a concentric channel 205.
  • the central lower one is omitted in this embodiment Opening 105 so that the housing 104 is closed in this regard is.
  • FIG 3 is another example of an inventive Realization of the additional opening in the switching chamber 100 shown.
  • the top one Part of the movable contact executed as a tube 301.
  • the Pipe 301 has circulation openings 302 to volume 120 outside the arc rotation path, so that gas from Volume 200 outside the switching chamber 100 in the far axis Partial volume 120 of the switching chamber volume 110, but not in the partial volume 130 close to the axis can occur as soon as the rotation of the arc 106 the pressure conditions required for this has created. In that for that by the arc 106 thermally separated volumes 130 therefore no gas enters.
  • FIG 4 shows an example of controlled closing the additional opening 107, which is the exit opening for the Gas acts by means of a valve element 110, 110 '.
  • the valve element 110 gives the gas flow free into the switching chamber 10 and the gas escapes from the Outside space.
  • Increases with progressing from the arc Heating of the gas inside the switching chamber 10 the gas pressure in the gas volume 100 above the gas pressure prevails in the environment 200 outside the switching chamber 10, the pressure in the switching chamber 10 presses the valve element 110 'against the suction opening 107 and closes it. It can no gas from the switching chamber through the suction opening 107 10 escape.
  • the gas flow out of the switching chamber 10 is then in the desired manner alone on the blow-out opening 105 concentrated.
  • the upper part is an example in connection with auto-compression switches known switching chamber 10 shown.
  • the switching chamber 10 encloses as a housing wall 104 a volume such that an autocompression chamber is formed from insulating material.
  • Within the Switching chamber 10 there is a movable contact 101, a fixed contact and a means for generating magnetic fields, which two latter elements in the upper part figure are not shown.
  • the switching pin 101 In the upper part of the housing wall 104 with a closing lid 109 plunges the switching pin 101 with a movable switching contact one which is axially displaceable.
  • a movable switching contact In the upper part of the housing wall 104 with a closing lid 109 plunges the switching pin 101 with a movable switching contact one which is axially displaceable.
  • Around the shift pin 101 is an annular slot 107 through which the fluidic connection of the housing wall 104 of the autocompression chamber is achieved with the environment.
  • the end wall 109 is ring-shaped around the switching pin 101 issued so that by elements 305, 310 and 311 a separate partial volume 320 is enclosed.
  • Partial volume 320 is a ring plate between two stops 310 and 311 arranged so that it by axial displacement is stable in two end positions.
  • valve element is thus movable Plate 300 realized, for example as a ring around the movable into the autocompression chamber Switch pin 101 is attached.
  • the plate 300 is out made of a light, electrically non-conductive material, for example from thermoplastic, thermosetting or from a different type of plastic. Its inert mass must be selected so that it is the result of pressure changes accelerating forces occurring in the switch almost instantaneously can follow, so that the valve action in the for Switch relevant periods in the millisecond range can occur.
  • the plate 300 also moves, for example integrated in the lid 109 of the autocompression chamber Room 320, which advantageously has the enlarged outer contour of the plate 300.
  • the axial path of the plate 300 along the switching pin 101 and thus the space in which the plate 300 moves, is in both possible directions by stops 310, 311 limited.
  • the upper stop 310 is in the direction of the surroundings continuous.
  • the stop 310 can be manufactured in the direction of the environment advantageously - as well as the entire room in which the plate 300 moves - directly part of the for example, cover 109 produced by injection molding Autocompression chamber with housing wall 104.
  • the attack in the direction of the autocompression chamber Introducing additional elements, for example can be realized by gluing or snap connections.

Landscapes

  • Circuit Breakers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP02013162A 2001-06-27 2002-06-14 Disjoncteur Withdrawn EP1276125A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10131018 2001-06-27
DE2001131018 DE10131018C1 (de) 2001-06-27 2001-06-27 Leistungsschalter
DE2002104042 DE10204042B4 (de) 2002-02-01 2002-02-01 Leistungsschalter
DE10204042 2002-02-01

Publications (2)

Publication Number Publication Date
EP1276125A2 true EP1276125A2 (fr) 2003-01-15
EP1276125A3 EP1276125A3 (fr) 2004-05-06

Family

ID=26009593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02013162A Withdrawn EP1276125A3 (fr) 2001-06-27 2002-06-14 Disjoncteur

Country Status (1)

Country Link
EP (1) EP1276125A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103201809A (zh) * 2011-01-07 2013-07-10 三菱电机株式会社 开闭装置
DE102013205945A1 (de) * 2013-04-04 2014-10-09 Siemens Aktiengesellschaft Trennschalteinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743972C (de) * 1938-11-24 1944-01-06 Aeg Stromunterbrecher, insbesondere Schalter mit Lichtbogenloeschung durch ein Druckmittel
DE910685C (de) * 1941-01-21 1954-05-06 Aeg Elektrischer Stromunterbrecher, insbesondere Schalter mit Lichtbogenloeschung durch ein Druckmittel
GB1100564A (en) * 1964-01-22 1968-01-24 Emil Lange Improvements in electric circuit-breakers
US4786770A (en) * 1986-06-06 1988-11-22 Mitsubishi Denki Kabushiki Kaisha Switchgear
FR2718281A1 (fr) * 1994-03-30 1995-10-06 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743972C (de) * 1938-11-24 1944-01-06 Aeg Stromunterbrecher, insbesondere Schalter mit Lichtbogenloeschung durch ein Druckmittel
DE910685C (de) * 1941-01-21 1954-05-06 Aeg Elektrischer Stromunterbrecher, insbesondere Schalter mit Lichtbogenloeschung durch ein Druckmittel
GB1100564A (en) * 1964-01-22 1968-01-24 Emil Lange Improvements in electric circuit-breakers
US4786770A (en) * 1986-06-06 1988-11-22 Mitsubishi Denki Kabushiki Kaisha Switchgear
FR2718281A1 (fr) * 1994-03-30 1995-10-06 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103201809A (zh) * 2011-01-07 2013-07-10 三菱电机株式会社 开闭装置
EP2662877A1 (fr) * 2011-01-07 2013-11-13 Mitsubishi Electric Corporation Appareil de commutation
EP2662877A4 (fr) * 2011-01-07 2014-12-17 Mitsubishi Electric Corp Appareil de commutation
US9117608B2 (en) 2011-01-07 2015-08-25 Mitsubishi Electric Corporation Switchgear
DE102013205945A1 (de) * 2013-04-04 2014-10-09 Siemens Aktiengesellschaft Trennschalteinrichtung

Also Published As

Publication number Publication date
EP1276125A3 (fr) 2004-05-06

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