EP0222690A1 - Agencement de contact pour interrupteurs de circuit basse tension à corps isolant mouvant - Google Patents

Agencement de contact pour interrupteurs de circuit basse tension à corps isolant mouvant Download PDF

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Publication number
EP0222690A1
EP0222690A1 EP86730173A EP86730173A EP0222690A1 EP 0222690 A1 EP0222690 A1 EP 0222690A1 EP 86730173 A EP86730173 A EP 86730173A EP 86730173 A EP86730173 A EP 86730173A EP 0222690 A1 EP0222690 A1 EP 0222690A1
Authority
EP
European Patent Office
Prior art keywords
contact arrangement
insulating
insulating body
plate
contact
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Withdrawn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
EP86730173A
Other languages
German (de)
English (en)
Inventor
Reinhard Dipl.-Ing. Kugler
Karl-Heinz Ing. Grad. Manthe
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 EP0222690A1 publication Critical patent/EP0222690A1/fr
Withdrawn legal-status Critical Current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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H9/383—Arcing contact pivots relative to the movable contact assembly

Definitions

  • the invention relates to a contact arrangement for a low-voltage circuit breaker with a fixed and a movable part and with an insulating body connected to the movable part as a delimitation of the contact arrangement from other assemblies of the circuit breaker.
  • a contact arrangement of this type is known for example from DE-A-1 021 054 or DE-A-2 260 837.
  • the insulating body has the task of directing the arc gases occurring during switching in a certain direction and thereby influencing the development of the switching arc in a desired manner or preventing the spreading of the arc gases inside the circuit breaker in the direction of other assemblies of the circuit breaker. This is particularly important if the circuit breaker is designed with multiple poles and if the poles are spatially closely adjacent, the risk of arcing between the neighboring poles must be prevented. An unhindered spread of arc gases can also cause interference with other sensitive components, e.g. B. a trigger unit.
  • an insulating body is rigidly connected to the movable contact lever.
  • the insulating body covers the space formed between the fixed and the movable contact and thereby prevents an outward movement arc gases pass downwards.
  • the arc thus has only one possibility of expansion in the direction of a quenching chamber, which has an advantageous effect on the arc quenching.
  • the insulating body is part of a crossmember which is used to move the movable part of the contact arrangement.
  • the insulating body closes the space which forms when the contact arrangement is opened, in order to prevent a switching arc from wandering in an undesired direction.
  • the invention is based, in particular to prevent the spread of arc gases in the direction of movement of the movable part of the contact arrangement in order to protect the circuit breaker assemblies located there.
  • this object is achieved in that the insulating body is plate-shaped and is positively attached to a drive member which transmits the drive movement to the movable part of the contact arrangement.
  • the insulating body can be produced with little effort from a plate-shaped insulating material as a separate part and can be inserted into the switch during assembly of the circuit breaker by simple handling, for example by plugging or snapping.
  • the mass of the insulating body and thus its influence on the switching movement is small.
  • An insulating body of the type described above can be made particularly effective according to a further development of the invention in that stationary insulating parts in such a relative manner above and below the contact arrangement Position are arranged that with the part of the contact arrangement in its disconnection, the plate-shaped insulating body acts as part of an insulating wall separating the contact arrangement from other assemblies of the circuit breaker.
  • the plate-shaped insulating body acts as part of an insulating wall separating the contact arrangement from other assemblies of the circuit breaker.
  • a gap which remains in the switched-on state and through which air can flow continuously. This air flow is favorable for dissipating the heat loss which arises at the contact arrangement through which the continuous current flows in the switched-on position.
  • the insulating coupling which acts directly on the movable part of the contact arrangement. This is advantageous both in terms of accessibility during assembly and in terms of thermal insulation of the insulating body with respect to the movable part of the contact arrangement.
  • An insulating body according to the invention can be used in the same way for contact arrangements which have only one insulating coupling or a plurality of insulating coupling. It is advisable to provide the insulating body with a corresponding number of receiving openings in the case of contact arrangements with a plurality of insulating couplers.
  • the insulating body may be advantageous in view of the mechanical stress occurring at the connection point with the insulating couplers to arrange the insulating body pivotably on the associated insulating coupler or the insulating couplers and the bottom edge of the insulator body to assign a stationary insulating stop bar as a further pivot bearing during the switching movements. This ensures that the insulating body does not experience a parallel displacement during the switching movements, but rather a pivoting movement around its lower edge. The kinetic energy and thus the mechanical stress are significantly lower with this movement.
  • the contact arrangement 1 shown in FIG. 1 is part of a multi-pole low-voltage circuit breaker.
  • the contact arrangement comprises a fixed part 2 and a movable part 3 which can be actuated by means of a suitable drive device (not shown).
  • the fixed part of the contact arrangement has an insulating block 4 as a carrier of an upper connecting bar 5 and a lower connecting bar 6.
  • threaded sockets 7 and 10 serve to fasten the connecting bar 5, a fixed contact piece 11 with a contact piece support 12 and the lower connecting bar 6 and a flexible current band 13.
  • This provides the movable connection with the movable Part 3 of the contact arrangement 1 ago, which comprises a pivotable about a bearing pin 14 contact lever 15 with a movable contact piece 16 and a contact piece support 17.
  • the contact levers 15 are in turn pivotable on the carrier 20 about a bolt 22 and are under the action of compression springs 23, which act as contact force springs in the switch-on position shown and act as switch-off springs when the isolating coupling 21 is released.
  • the switching arc arises between the contact piece supports 12 and 17, passes under the influence of the loop effect of the current path on arcing horns 24 and 25 and from these into a suitable arcing chamber located above the contact arrangement 1.
  • the ignition of the arc is associated with the formation of a pressure wave, the spread of which is influenced in a desired manner by measures to be described. This is accompanied by the spread of arcing gases, which are heated and therefore ionized air as well as metal vapor and possibly vapors from other materials exposed to the arc.
  • the insulating block 2 represents a fixed limitation, a spread of the pressure wave and the arc gases can be expected above all, ie into the arc quenching chamber, and to the right, ie in the direction of the isolating coupling 21 and downwards in the direction of the current band 13.
  • sensitive assemblies of the circuit breaker for example electronic trip units, mechanical precision parts or closely adjacent live parts, are adversely affected Isolation parts provided, which will be described below.
  • insulating partitions 26 are separated from one another by insulating partitions 26, as is known per se. These insulating partitions are provided with stop strips 27 which cooperate with a plate-shaped insulating body 28.
  • the insulating body 28 is attached to the insulating coupling 21 and is fastened in a form-fitting manner between the carrier 20 and retaining lugs 29 of the insulating coupling 21.
  • a bulkhead 30 arranged transversely to the insulating partition 26 and a lower angular bulkhead 31 are provided.
  • the plate-shaped insulating body 28 faces the partition walls 30 and 31 with such a distance that air has access from the side to the contact arrangement in the direction of the arrows 32 and 33, which has an advantageous effect on its cooling. If, on this basis, the contact lever 15 is opened in the direction of arrow 34 by means of the isolating coupling 21, the isolating body 28 lies against the stop strips 27 of the isolating partition walls 26 located on both sides of the contact arrangement 1, whereby at the same time the gaps between the isolating body 28 and the bulkheads 30 and 31 be closed, as can be seen from the position of the insulating body 28 shown in dashed lines in FIG. 1. This prevents the undesirable spread of the arc gases to the right and downwards.
  • FIG. 2 In connection with contact arrangements which have a relatively large width due to a number of main contacts arranged next to one another, it is advisable to choose the embodiment according to FIG. 2, which has a movement sequence which is different from that in FIG.
  • the contact arrangement 40 shown in FIG. 2 has an im Principle similar structure as the contact arrangement 1 according to Figure 1, so that a detailed description can be dispensed with.
  • main contacts with contact piece supports 43 and 44 In addition to the burn-off contacts with contact piece supports 41 and 42 there are main contacts with contact piece supports 43 and 44. Depending on the nominal current provided, a corresponding number of main contacts 43 and 44 can be provided in a parallel arrangement. Accordingly, it is necessary to provide a plate-shaped insulating body 45 of a corresponding width.
  • the insulating body 45 is not rigidly attached to the insulating coupling 46 or a plurality of parallel insulating couplers 46, but z. B. movable by a spherical design of holding ribs 47 so that the insulating body 45 remains with its lower edge 50 in contact with an upright leg 52 of a lower angular bulkhead 51.
  • the insulating body 45 is inclined relative to the insulating coupling 46 and in the end position is approximately flush with an upper bulkhead wall 53.
  • the partitioning of the contact arrangement 40 from other identical contact arrangements or a side wall of the circuit breaker can be carried out in the same manner as was explained with reference to FIG. 1.
  • insulating partitions can therefore be provided at their spacing the width of the insulating body 45 is adapted, with additional stop strips being able to be provided in order to close the gaps.
  • FIGS. 3, 4 and 5 Examples of plate-shaped insulating bodies are shown in FIGS. 3, 4 and 5.
  • the insulating body 60 according to FIG. 3 has an essentially rectangular shape and is provided with two openings 61 and 62, which are provided for the passage of insulating couplings of the movable part of the contact arrangement.
  • This embodiment of an insulating body is suitable, for example, for the contact arrangement according to FIG. 1.
  • the insulating body 65 according to FIG. 4 likewise has two openings 66 and 67 for the passage of insulating couplers in the case of a rectangular basic shape, which, however, are at a greater distance from one another than is provided for the insulating body 60 in FIG. 3. Accordingly, the insulating body 65 is suitable for wider contact arrangements with a larger number of individual contact points.
  • the insulating body 70 shown in FIG. 5 is shown on a smaller scale than in FIGS. 3 and 4 and is therefore actually larger than the insulating body 65 in FIG. 4.
  • This embodiment of an insulating body is particularly suitable for contact arrangements according to FIG. 2, which are designed for a high rated current and accordingly require a larger number of insulating couplers with regard to their expansion and their power requirement when switching on and off.
  • an insulating body 70 according to FIG. 5 is suitable for the contact arrangement 40 in FIG. 2.
  • plate-shaped insulating materials are suitable, for example impregnated and pressed fabric webs impregnated with suitable plastics, e.g. B. so-called hard tissue.
  • suitable plastics e.g. B. so-called hard tissue.
  • the bulkhead walls 30, 31, 51 and 53 shown in FIGS. 1 and 2 can also be produced from this.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
EP86730173A 1985-11-13 1986-10-23 Agencement de contact pour interrupteurs de circuit basse tension à corps isolant mouvant Withdrawn EP0222690A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853540655 DE3540655A1 (de) 1985-11-13 1985-11-13 Kontaktanordnung fuer niederspannungs-leistungsschalter mit einem bewegbaren isolierkoerper
DE3540655 1985-11-13

Publications (1)

Publication Number Publication Date
EP0222690A1 true EP0222690A1 (fr) 1987-05-20

Family

ID=6286133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730173A Withdrawn EP0222690A1 (fr) 1985-11-13 1986-10-23 Agencement de contact pour interrupteurs de circuit basse tension à corps isolant mouvant

Country Status (5)

Country Link
EP (1) EP0222690A1 (fr)
JP (1) JPS62117229A (fr)
BR (1) BR8605601A (fr)
DE (1) DE3540655A1 (fr)
IN (1) IN164576B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0489986A1 (fr) * 1990-12-14 1992-06-17 Siemens Aktiengesellschaft Interrupteur de puissance à basse tension avec un moyen de liaison isolant et un écran isolant
EP2541573A1 (fr) * 2011-06-30 2013-01-02 Eaton Corporation Isolateur de liaison de support pour disjoncteur
CN111341615A (zh) * 2020-03-26 2020-06-26 贵州泰永长征技术股份有限公司 一种特殊的浮动式静触头组件装置结构
EP4439603A1 (fr) * 2023-03-27 2024-10-02 ABB S.p.A. Pôle de commutateur basse tension avec déflecteurs

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19910033C1 (de) * 1999-03-08 2000-11-09 Moeller Gmbh Mehrpoliger Leistungsschalter
KR100881361B1 (ko) * 2007-07-12 2009-02-02 엘에스산전 주식회사 접압 스프링 보호 기구를 갖는 기중 차단기용 가동접촉자

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021054B (de) * 1954-05-11 1957-12-19 Siemens Ag Schaltkammer fuer elektrische Schaltgeraete
DE1926693A1 (de) * 1969-05-24 1970-11-26 Siemens Ag Lichtbogenloeschkammer fuer Niederspannungsleistungsschalter
DE2260837B2 (de) * 1972-12-13 1978-05-18 Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen Kontaktanordnung für Leistungsschalter
US4388506A (en) * 1979-02-07 1983-06-14 Terasaki Denki Sangyo Kabushiki Kaisha Circuit interrupter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021054B (de) * 1954-05-11 1957-12-19 Siemens Ag Schaltkammer fuer elektrische Schaltgeraete
DE1926693A1 (de) * 1969-05-24 1970-11-26 Siemens Ag Lichtbogenloeschkammer fuer Niederspannungsleistungsschalter
DE2260837B2 (de) * 1972-12-13 1978-05-18 Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen Kontaktanordnung für Leistungsschalter
US4388506A (en) * 1979-02-07 1983-06-14 Terasaki Denki Sangyo Kabushiki Kaisha Circuit interrupter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0489986A1 (fr) * 1990-12-14 1992-06-17 Siemens Aktiengesellschaft Interrupteur de puissance à basse tension avec un moyen de liaison isolant et un écran isolant
EP2541573A1 (fr) * 2011-06-30 2013-01-02 Eaton Corporation Isolateur de liaison de support pour disjoncteur
CN102856125A (zh) * 2011-06-30 2013-01-02 伊顿公司 用于断路器的载体连杆绝缘器
CN111341615A (zh) * 2020-03-26 2020-06-26 贵州泰永长征技术股份有限公司 一种特殊的浮动式静触头组件装置结构
EP4439603A1 (fr) * 2023-03-27 2024-10-02 ABB S.p.A. Pôle de commutateur basse tension avec déflecteurs

Also Published As

Publication number Publication date
IN164576B (fr) 1989-04-15
BR8605601A (pt) 1987-08-18
DE3540655A1 (de) 1987-05-14
JPS62117229A (ja) 1987-05-28

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Inventor name: KUGLER, REINHARD, DIPL.-ING.