EP2393096A1 - Appareil de commutation basse tension pouvant être interrompu facilement, notamment commutateur de protection de ligne - Google Patents

Appareil de commutation basse tension pouvant être interrompu facilement, notamment commutateur de protection de ligne Download PDF

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Publication number
EP2393096A1
EP2393096A1 EP10165048A EP10165048A EP2393096A1 EP 2393096 A1 EP2393096 A1 EP 2393096A1 EP 10165048 A EP10165048 A EP 10165048A EP 10165048 A EP10165048 A EP 10165048A EP 2393096 A1 EP2393096 A1 EP 2393096A1
Authority
EP
European Patent Office
Prior art keywords
conductor
arc
switching
current
plane
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
EP10165048A
Other languages
German (de)
English (en)
Other versions
EP2393096B1 (fr
Inventor
Fabian Kühn
Thomas Busenhart
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz 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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP20100165048 priority Critical patent/EP2393096B1/fr
Priority to ES10165048T priority patent/ES2404845T3/es
Priority to CN201110162150.9A priority patent/CN102360972B/zh
Publication of EP2393096A1 publication Critical patent/EP2393096A1/fr
Application granted granted Critical
Publication of EP2393096B1 publication Critical patent/EP2393096B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • 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

Definitions

  • the present invention relates to a simple interrupting low-voltage switching device, in particular to a circuit breaker.
  • switching devices serve the rapid and reliable protection of low-voltage consumers, in particular lines, electric motors, systems or apparatus.
  • the low-voltage switching device in addition to two terminals, power connections and a triggering device for detecting the current in the switch also arc guide rails that guide the switching arc from the contact point to the arc extinguishing chamber, and means that support the guiding of the switching arc.
  • Low-voltage switchgear of the type mentioned are described in DE 195 24 915 C2 and in DE 33 34 852 A1 , In these devices, a first current conductor connecting a fixed contact of the contact point to a first terminal of the switch ( DE 195 24 915 C2 ), or in a second conductor connecting a movable contact of the pad with a second terminal ( DE 33 34 852 A1 ), one around the contact point Guided blown loop molded. This blown loop is therefore traversed by the current to be disconnected and generates a magnetic blower field. This blast field supports the intrinsic field of the switching arc. The switching arc is therefore additionally accelerated on its way from the contact point to the arc extinguishing chamber. There are thus achieved a shortening of the arc run time and, accordingly, an improved quenching behavior and an increase in the switching capacity of the switch.
  • the object is to provide a simple interrupting low-voltage switching device of the type mentioned, which is characterized despite a simple structure by a short arc runtime and a good erase behavior.
  • the interruption of a current the movable contact moves on a plane against the second arc track and forms when opening the contact point lying in the plane through which Distance of the separating contacts certain switching distance.
  • a foot point, held on the moving contact, of a switching arc formed when the contact point is opened passes from the moving contact to the second arc running rail, and the current commutes in the third current conductor.
  • the first conductor of this switching device has a parallel to the plane, the switching path bridging and arranged on the side facing away from the arc quenching chamber side of the switching path first conductor section.
  • the third conductor has a parallel to the plane, the switching path bridging second conductor portion. During the interruption process, both the first and second conductor sections conduct the current counter to their direction in the switching arc.
  • the low-voltage switching device therefore has instead of a complex Blasschleife in the vicinity of the switching path and the two arc run rails on the two formed by the first and second conductor portion current return.
  • These power returns are easy to design and take up little space. Since the current to be interrupted in the two conductor sections is guided in each case against its direction in the switching arc, push both conductor sections together from the switching arc. Since the third conductor and thus the second conductor section integrated into it lead only after the transition of the arc root on the second arc run the current to be interrupted, are from this time particularly large electromagnetic forces available, the fast on the two arc runners switching arc in drive the arc extinguishing chamber.
  • the second conductor section Since the second conductor section is involved in the structure of the electromagnetic forces only after the commutation of the current in the third conductor, it can like the first conductor section on the side facing away from the arc extinguishing chamber side of the switching path, but can also be arranged on the arc extinguishing chamber side facing the switching path be.
  • the low-voltage switching device according to the invention is characterized by a simple structure, a short arc duration and a good extinguishing ability.
  • the first conductor section may extend predominantly parallel to the switching path, while the second conductor section may have a smaller distance from the arc extinguishing chamber than the first conductor section.
  • the switching arc can be erased particularly quickly and safely. This is mainly because the second conductor section positioned closer to the arc extinguishing chamber acts on the switching arc after the current commutation with greater electromagnetic forces than the first conductor section, and since the arc is driven particularly rapidly into the arc extinguishing chamber after its transition to the arc running rails.
  • the second conductor section may be inclined relative to the first conductor section.
  • the first and the third conductor portion respectively spaced from the plane to both sides of the Be arranged level, wherein the distance of the first conductor portion is smaller than the distance of the third conductor portion.
  • the third conductor section can be designed to be flexible and, in a production-wise advantageous manner, can be attached with one of its two ends in an electrically conductive manner on an end of a contact carrier of the movable contact brought out of the plane.
  • the other end of the third Conductor portion may be electrically connected to a power connector of a built-in second conductor coil of a short-circuit current release.
  • the second current conductor may be one between the second terminal and the arc extinguishing chamber Having arranged fourth conductor section, which is aligned perpendicular to the quenching plates of the arc quenching chamber and in which the current to be interrupted when entering the switching arc in the arc extinguishing chamber has the same sense as the switching arc.
  • the shrinkage of the switching arc in the arc quenching chamber is promoted even more and, accordingly, the arc time is additionally shortened.
  • the in Fig. 1 illustrated circuit breaker has in a line lying in order a terminal 10, an arc quenching device with a single-break pad 20, with two arc runners 30, 40 and with an arc extinguishing chamber 50 and a terminal 60 on.
  • the contact point 20 includes a fixed contact 21 which is held in an electrically conductive manner on a conductor 10 connected to the terminal 10, and a cooperating with the fixed contact 21 movable contact 22 in an electrically conductive manner on a pivotally mounted about an axis 23 contact carrier 24 is held.
  • the contact carrier 24 is connected via a sectionally flexible conductor 80 formed in an electrically conductive manner with the terminal 60.
  • the arc runner 30 is electrically connected to the current conductor 70, whereas the arc runner 40 is electrically connected to the current conductor 80.
  • the arc runners 30, 40 extend in one of the FIGS. 2 and 3 apparent level E.
  • an arc quenching chamber 50 is arranged, which has a stack of parallel aligned and spaced apart quenching plates 51.
  • the current conductor 70 has a rigidly formed conductor section 71, which extends parallel to the plane E, whereas the current conductor 80 has a conductor section 81 which is parallel to the plane but flexible, typically in the form of a stranded wire. From the FIGS. 1 and 3 It can be seen that each of the two sections 71, 81 extends at least in sections parallel to a lying in the plane E switching path S, which forms when opening the switch between the separating contacts 21, 22.
  • the movable contact 22 is electrically conductively connected to the one end of the contact carrier 24 which can also be used for double-break switches.
  • the other end of the contact carrier 24 is electrically conductively connected via the conductor section 81 in manufacturing technology advantageously with a power connection 82 of an integrated in the conductor 80 coil 83 of a short-circuit current release of the switch.
  • the power connection 82 and the arc running rail 40 integrated into the current conductor 80 are connected to one another by a conductor piece 84 configured as a stranded wire, which has a conductor section 85 running parallel to the plane E according to FIG Figure 3 has a smaller distance from the plane E than the conductor portion 81.
  • Both the conductor section 85 and the conductor section 71 bridge the switching path S and therefore have a longitudinal extent corresponding to the switching path when the switch is open.
  • the short-circuit current C to be interrupted in the two conductor sections 71 and 81 is guided in each case against its direction in the switching arc L. Therefore, the two conductor sections push the switching arc L due to electromagnetic forces.
  • the two conductor sections 71 and 81 are arranged so that a directed towards the quenching chamber 50 component of the electromagnetic forces has sufficient size to ensure a rapid transition of the on the movable contact 22 located to ensure the base point of the switching arc from the contact 22 on the arc guide rail 40.
  • the conductor section 71 is arranged on the side facing away from the arc extinguishing chamber 50 side of the switching path S. Because the conductor section 81 is likewise arranged on this side, that is to say above the switching path S, a force component of the repulsive, electromagnetic forces which particularly promotes the transition of the arc root point to the arc running rail 40 is achieved at the beginning of the interruption process.
  • the conductor section 81 is arranged below the switching path S, that is, if it is located on the side of the switching path S facing the arc-quenching chamber 50, then it has - as shown in FIGS FIGS. 2 and 3 can be seen - a greater distance to the plane E than the conductor portion 71. Also in this case, a sufficiently large for the transition of the arc root force component is achieved.
  • a force component exerting the aforementioned effect is achieved with certainty if the conductor sections 71 and 81 are positioned in a plane normal to the plane E and laid through the switching path S normal plane N equidistant to the plane E, and if in the normal plane N of ( Leading the current C) conductor section 71 to (the current C leading) conductor section 81 guided straight line G - based on the course of the arc bars 30, 40 - on the side facing away from the arc extinguishing chamber 50 side of the - the base of the arc L receiving - switching path S - So above the switching path - runs.
  • the current C commutates in the current conductor 80 and is now guided by the arc L 'on the arc rail 40, the conductor 84 and the conductor 80 to the terminal 60.
  • the short-circuit current has the same sense of direction as before in the conductor section 81.
  • the repulsive, electromagnetic forces are now generated in the two conductor sections 71 and 85. These forces drive the arc on the two arc runners 30 and 40 switching arc L 'in the Arc quenching chamber 50 of the switch in which it is divided by the quenching plates 51 in partial arcs, cooled and deleted.
  • the conductor section 85 has a smaller distance from the plane E than the conductor section 81.
  • the component of the electromagnetic forces driving the switching arc L ' is thus increased.
  • the conductor section 85 is guided closer to the arc extinguishing chamber 50 than the conductor section 71.
  • the conductor 80 has a arranged between the terminal 60 and the arc extinguishing chamber 50 conductor portion 86 which is aligned perpendicular to the quenching plates 51 and only a small distance to Arc quenching chamber 50 has.
  • the short-circuit current to be interrupted has the same sense of direction in this section as in the switching arc L '. Therefore, the short-circuit current in the conductor section 86 generates electromagnetic forces, the switching arc S resp. tighten the partial arcs and thus additionally improve the extinguishing capacity of the switch.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
EP20100165048 2010-06-07 2010-06-07 Appareil de commutation basse tension pouvant être interrompu facilement, notamment commutateur de protection de ligne Not-in-force EP2393096B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20100165048 EP2393096B1 (fr) 2010-06-07 2010-06-07 Appareil de commutation basse tension pouvant être interrompu facilement, notamment commutateur de protection de ligne
ES10165048T ES2404845T3 (es) 2010-06-07 2010-06-07 Aparato de conmutación de baja tensión que puede ser interrumpido fácilmente, en particular conmutador de protección de línea
CN201110162150.9A CN102360972B (zh) 2010-06-07 2011-06-07 单一中断的低压开关设备,尤其为线路保护开关

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100165048 EP2393096B1 (fr) 2010-06-07 2010-06-07 Appareil de commutation basse tension pouvant être interrompu facilement, notamment commutateur de protection de ligne

Publications (2)

Publication Number Publication Date
EP2393096A1 true EP2393096A1 (fr) 2011-12-07
EP2393096B1 EP2393096B1 (fr) 2013-02-13

Family

ID=42946326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100165048 Not-in-force EP2393096B1 (fr) 2010-06-07 2010-06-07 Appareil de commutation basse tension pouvant être interrompu facilement, notamment commutateur de protection de ligne

Country Status (3)

Country Link
EP (1) EP2393096B1 (fr)
CN (1) CN102360972B (fr)
ES (1) ES2404845T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112530765A (zh) * 2020-12-25 2021-03-19 浙江奥来电器有限公司 一种断路器的n极灭弧装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016216392A1 (de) 2016-08-31 2018-03-01 Siemens Aktiengesellschaft Schalteinheit für einen elektrischen Schalter und elektrischer Schalter
CN114050096A (zh) * 2021-11-11 2022-02-15 西安理工大学 一种小型断路器灭弧系统及具有其的小型断路器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2381637A (en) * 1942-04-09 1945-08-07 Ite Circuit Breaker Ltd Arc quencher
DE3334852A1 (de) 1983-07-18 1985-01-31 Serd S.A., Straßburg/Strasbourg Leitungsschutzschalter mit lichtbogenanlaufhilfe
EP0980085A2 (fr) * 1998-08-13 2000-02-16 Siemens Aktiengesellschaft Disjoncteur de puissance à bobine de soufflage actionné par l'arc
DE19524915C2 (de) 1995-07-08 2003-06-26 Abb Patent Gmbh Lichtbogenlöschanordnung für einen elektrischen Schalter, insbesondere für einen Leitungsschutzschalter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352934B4 (de) * 2003-11-11 2005-12-22 Siemens Ag Lichtbogen-Löschvorrichtung
DE102004018275B4 (de) * 2004-04-15 2007-10-18 Siemens Ag Schaltgerät

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2381637A (en) * 1942-04-09 1945-08-07 Ite Circuit Breaker Ltd Arc quencher
DE3334852A1 (de) 1983-07-18 1985-01-31 Serd S.A., Straßburg/Strasbourg Leitungsschutzschalter mit lichtbogenanlaufhilfe
DE19524915C2 (de) 1995-07-08 2003-06-26 Abb Patent Gmbh Lichtbogenlöschanordnung für einen elektrischen Schalter, insbesondere für einen Leitungsschutzschalter
EP0980085A2 (fr) * 1998-08-13 2000-02-16 Siemens Aktiengesellschaft Disjoncteur de puissance à bobine de soufflage actionné par l'arc

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112530765A (zh) * 2020-12-25 2021-03-19 浙江奥来电器有限公司 一种断路器的n极灭弧装置

Also Published As

Publication number Publication date
EP2393096B1 (fr) 2013-02-13
CN102360972B (zh) 2015-09-16
CN102360972A (zh) 2012-02-22
ES2404845T3 (es) 2013-05-29

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