EP0100699B1 - Interrupteur électrique multipolaire à basse tension et à haute tenue électrodynamique - Google Patents

Interrupteur électrique multipolaire à basse tension et à haute tenue électrodynamique Download PDF

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Publication number
EP0100699B1
EP0100699B1 EP19830401328 EP83401328A EP0100699B1 EP 0100699 B1 EP0100699 B1 EP 0100699B1 EP 19830401328 EP19830401328 EP 19830401328 EP 83401328 A EP83401328 A EP 83401328A EP 0100699 B1 EP0100699 B1 EP 0100699B1
Authority
EP
European Patent Office
Prior art keywords
contact
blades
finger
slide
blade
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.)
Expired
Application number
EP19830401328
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0100699A1 (fr
Inventor
Pierre Laffont
Denis Vial
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0100699A1 publication Critical patent/EP0100699A1/fr
Application granted granted Critical
Publication of EP0100699B1 publication Critical patent/EP0100699B1/fr
Expired 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force

Definitions

  • the invention aims to remedy these drawbacks and allow the production of a switch with high electrodynamic resistance and improved electrical endurance without increasing the size of the housing and the travel of the moving assembly.
  • each of the two knives constituting the clamp has a divided structure with multiple contact points, comprising a first contact finger provided at its opposite ends with two lateral projections, which frame a second contact finger juxtaposed with the first, and that the two projections of the first finger are each provided with a boss located in the same horizontal plane in the vicinity of another boss, arranged at each end of the second finger, each knife being thus equipped four points of contact with the pair of fixed contacts, the latter being arranged to cause a prior separation with the corresponding bosses of the second finger of each knife, at the start of the switch opening stroke, and the final separation with the bosses of the first finger when the slide continues to the open position.
  • the second contact finger of each knife is in the form of a bar housed inside an inverted U of the first contact finger.
  • the entry edge of each fixed contact advantageously has an oblique profile or a structure with notches offset in the direction of movement of the slide.
  • a multi-pole switch 10 with high electrodynamic resistance is shown for controlling and cutting low-voltage circuits.
  • the switch 10 housed in a molded insulating housing 12, comprises a movable assembly formed by a switching slide 14 equipped with a plurality of contact bridges 16 parallel and staggered at regular intervals, the number of bridges 16 corresponding to that of switch poles.
  • the movable slide 14 is arranged in the longitudinal median axis of the housing 12 and is actuated in alternating translation between the open and closed positions by a bidirectional operating mechanism 18 with a rotary handle (not shown).
  • the mechanism 18 coupled to the slide 14 is provided with a conventional toggle system 20 with abrupt passage of neutral position generating an optimal speed of opening and closing of the contacts.
  • Each pole is associated with a contact bridge 16 perpendicular to the slide 14, and cooperating with a pair of fixed contacts 22, 24 spaced apart and symmetrical with respect to the longitudinal central axis.
  • Each pair of fixed contacts 22, 24 is arranged at the internal ends of two conductive blades 26, 28 bearing on two sides pa opposite rows of the insulating housing 12. The outer ends of the blades 26, 28 serve as connection areas 30, 32 of the corresponding pole. All of the blades 26, 28 for supporting the fixed contacts 22, 24 of all the poles lie in the same plane parallel to the bottom of the housing 12, and is distributed in two identical rows arranged on either side of the axis of the slide 14.
  • the contact bridges 16 of the slide 14 are all identical to one another and only one will be described in detail below.
  • Each bridge 16 is of the self-compensated contact type comprising a pair of knives 34, 36 brought together and parallel to each other by extending perpendicular to the longitudinal direction of movement of the slide 14.
  • the pair of knives 34, 36 conductive material constitutes a clip in the form of a double lyre capable of enclosing the two fixed contacts 22, 24 spaced from the corresponding pole during the rectilinear movement of the slide 14 towards the closed position.
  • a device 38 for holding the two knives 34, 36 is arranged in the middle area of the bridge 16, and cooperates with elastic means, in particular springs 40, to ensure a suitable contact pressure.
  • each of the two knives 34, 36 constituting the clamp comprises a divided structure with multiple contact points, equipped with a first contact finger 44 outside with projections 44A, 44B, the assembly being shaped as an inverted U inside which is housed a second internal contact finger 46 juxtaposed in the form of a bar (FIGS. 3 and 4).
  • the opposite ends of the two contact fingers 44, 46 of each knife are cut in a chamfer so as to constitute four bosses 48A, 48B; 50A, 50B, the contact faces of which are located in the same plane.
  • the two bosses 48A, 48B of the external contact finger 44 belonging to the upper knife 34 are arranged opposite the conjugate bosses 48A, 48B of the external contact finger 44 belonging to the lower knife 36.
  • Each movable contact bridge 16 has, in the closed position of the switch, eight points of contact with the pair of fixed contacts 22, 24 of the corresponding pole.
  • the vertical spacing formed between the respective bosses of the two upper and lower knives 34, 36 corresponds substantially to the thickness of the fixed contacts 22, 24. In the closed position, the latter are sandwiched between the bosses of the two knives 34, 36, and each fixed contact 22, 24 has an oblique entry edge 52 cut in a bevel.
  • the flat central parts of the two knives 34, 36 of the bridge 16 are clamped against one another by the device 38 with the interposition of an insulating element 54 ensuring the distribution of the current in the two knives.
  • the holding device 38 for the knives 34, 36 comprises a pair of clamping members 56, 58 each provided with two support blades 60, 62 comprising two hooking pins 64, 66 folded at right angles in opposite directions and bearing on the base of the lower knife 36, one 64 on the internal contact finger 46, and the other 66 on the external contact finger 44.
  • the blades 60, 62 pass vertically through openings 68 aligned in the knives 34, 36 at the level of the separation plane of the contact fingers 44, 46.
  • the blades 60, 62 are equipped with pins 70 cooperating with washers 72 for stopping.
  • Each clamping member 56, 58 is associated with a compression spring 40 interposed between the stop washer 72 and the upper face of the knife 34 opposite the boss contacts. It is noted that the contact pressure spring 40 rests by means of a washer 72a on the two contact fingers 44, 46 juxtaposed constituting the upper knife 34.
  • the presence of the eight contact points per pole allows a reduction in the temperature rise of the switch in nominal operation and therefore allows an increase in size by using the same copper section for the contact members.
  • the electrical endurance of the switch is also improved thanks to the design of the knives 34, 36 and the oblique shape of the input edge 52 of the fixed contacts 22, 24.
  • At the start of the opening stroke (according to the direction of the arrow F) of the slide 14 takes place first of all the separation of the fixed contacts 22, 24 from the corresponding bosses 50A, 50B of the internal contact fingers 46 superimposed on the knives 34 and 36 (fig. 5) .
  • the edge 52 of the fixed contacts 22, 24 remains in contact with the other bosses 48A, 48B of the external contact fingers 44.
  • the closing power on short circuit and the electrodynamic resistance of the switch are also improved thanks to the judi distribution current current in the contact fingers of the knives 34, 36 without requiring an increase in the stroke of the slide 14.

Landscapes

  • Slide Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP19830401328 1982-07-13 1983-06-28 Interrupteur électrique multipolaire à basse tension et à haute tenue électrodynamique Expired EP0100699B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8212530 1982-07-13
FR8212530A FR2530373A1 (fr) 1982-07-13 1982-07-13 Interrupteur electrique multipolaire a basse tension et a haute tenue electrodynamique

Publications (2)

Publication Number Publication Date
EP0100699A1 EP0100699A1 (fr) 1984-02-15
EP0100699B1 true EP0100699B1 (fr) 1986-04-02

Family

ID=9276062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830401328 Expired EP0100699B1 (fr) 1982-07-13 1983-06-28 Interrupteur électrique multipolaire à basse tension et à haute tenue électrodynamique

Country Status (4)

Country Link
EP (1) EP0100699B1 (enrdf_load_stackoverflow)
DE (1) DE3362778D1 (enrdf_load_stackoverflow)
ES (1) ES523808A0 (enrdf_load_stackoverflow)
FR (1) FR2530373A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638017B1 (fr) * 1988-10-17 1990-11-30 Merlin Gerin Interrupteur electrique multipolaire a basse tension pour calibres eleves
FR2638018B1 (fr) * 1988-10-17 1990-11-30 Merlin Gerin Mecanisme de commande pour interrupteur electrique multipolaire a calibres eleves
FR2753563B1 (fr) * 1996-09-16 1998-10-16 Schneider Electric Sa Interrupteur electrique multipolaire ayant un barreau de commutation elementaire par pole
FR2795858B1 (fr) * 1999-07-01 2001-09-14 Schneider Electric Ind Sa Appareillage electrique de coupure dont un organe de contact est muni d'un pare etincelle
NL1015585C2 (nl) 2000-07-03 2002-01-04 Holec Holland Nv Schakelaar met hulp-en hoofdcontacten.
FR3003392B1 (fr) * 2013-03-15 2016-07-22 Schneider Electric Ind Sas Bloc unitaire de commutation et dispositif de commutation comportant au moins un tel bloc
DK3211648T3 (en) * 2016-02-29 2019-04-29 Woehner Gmbh & Co Kg Elektrotechnische Systeme SWITCH CONTACT ARRANGEMENT

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6603789U (de) * 1961-06-20 1969-11-06 Bbc Brown Boveri & Cie Elektrischer schalter mit elektrodynamischer kontaktdruckverstaerkung
DE1197160B (de) * 1962-10-30 1965-07-22 Bbc Brown Boveri & Cie Elektrischer Schalter
DE1256294B (de) * 1964-11-13 1967-12-14 Asea Ab Sammelschienentrennschalter
FR1472630A (fr) * 1965-04-14 1967-03-10 Hazemeijer Co Dispositif de commutation perfectionné
DE2833497C2 (de) * 1978-07-31 1983-03-10 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer Lastschalter für Niederspannungsanlagen
DE3027598A1 (de) * 1980-07-21 1982-02-18 Siemens AG, 1000 Berlin und 8000 München Trennschalter

Also Published As

Publication number Publication date
EP0100699A1 (fr) 1984-02-15
FR2530373B1 (enrdf_load_stackoverflow) 1984-12-14
ES8403664A1 (es) 1984-04-01
DE3362778D1 (en) 1986-05-07
FR2530373A1 (fr) 1984-01-20
ES523808A0 (es) 1984-04-01

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