EP0746863B1 - Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser - Google Patents

Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser Download PDF

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Publication number
EP0746863B1
EP0746863B1 EP95938399A EP95938399A EP0746863B1 EP 0746863 B1 EP0746863 B1 EP 0746863B1 EP 95938399 A EP95938399 A EP 95938399A EP 95938399 A EP95938399 A EP 95938399A EP 0746863 B1 EP0746863 B1 EP 0746863B1
Authority
EP
European Patent Office
Prior art keywords
tappet
contact
striking pin
contact system
fork
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 - Lifetime
Application number
EP95938399A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0746863A1 (de
Inventor
Volker Blechacz
Peter Willerscheidt
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.)
Eaton Industries GmbH
Original Assignee
Kloeckner Moeller GmbH
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 Kloeckner Moeller GmbH filed Critical Kloeckner Moeller GmbH
Publication of EP0746863A1 publication Critical patent/EP0746863A1/de
Application granted granted Critical
Publication of EP0746863B1 publication Critical patent/EP0746863B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H89/08—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism

Definitions

  • the invention relates to a contact system with fixed and movable contact pieces for an electromagnetic Switchgear with housed in a housing Switching magnet with armature and with a quick release Firing pin, the movable contact pieces on one Contact bridge are attached in one with a plunger connected contact carrier against the pressure of one in the Contact carrier mounted compression spring is movably mounted and the plunger with the contact carrier with the anchor of the Switching magnet of the switching device is motion-coupled, and the firing pin of the quick release on the contact bridge for lifting the movable contact pieces from the fixed ones Acts on contact pieces.
  • Magnetically operated switching devices in particular air contactors
  • the design mentioned at the beginning are in many different ways Execution known, for which only, for example DE-OS 33 40 904 and DE-OS 28 48 287 is referred.
  • These Switchgear is the contact piece for every type of Closing more or less stressed.
  • At the one and Switching from contactors often occurs bouncing vibrations when the moving contact pieces hit the fixed ones Contact pieces that lead to undesirable contact wear and Burn contact. It is known to help reduce Bounce vibrations below the fixed contact pieces provide elastic underlays or strong leaf springs directly on the movable contact piece or the movable one To let contact pieces carrying contact bridge attack.
  • the contact pieces of switching devices are, however, except for the regular switching operations also after the dynamic Opening due to a short-circuit current for wear claimed.
  • the dynamic unwanted opening of the Contact pieces occur in the event of overcurrent from a certain height, the so-called withdrawal limit, due to magnetic Lifting forces. It can cause considerable wear and tear Contact pieces lead when a so-called pumping Contact pieces occurs.
  • the magnet remains during this process of the switching device attracted while the contact bridges with the movable contact pieces against the Move the direction of action of the compression spring to the lifting position and the arc burns. If the moving contact pieces after extinguishing the arc, fall back on the Fixed contacts, i.e. be brought back by the compression spring, can weld the movable contact pieces with the Fixed contact pieces occur when the due to the Arc not melted contact surfaces again are sufficiently solidified.
  • From DE-OS 38 24 546 is an electrical circuit breaker known with a contact system in which everyone the movable Contacts carrying contact bridge an impact anchor system is assigned to each contact bridge to open the Contact points acts and also a switch lock, to which the impact anchor systems and a thermal trigger act. This is when the contacts are triggered and opened the contact bridge under the constant influence of a Spring arrangement via a lever and intermediate link acted upon, and held in the release position.
  • This The disadvantage of the system is that the force is constant must be applied to the contact bridge in order to open position opposite the contact bridge directly pressurizing spring to hold. With vibrations or other malfunctions, the contact bridge itself if necessary, close again unintentionally.
  • EP 0350 826 A2 describes a contact system for a Switching device described, in which the feedback of the Magnet armature is delayed to the starting position, such that the way back by helical The magnet armature moves. Neither is done here Securing the release position.
  • DE-OS 36 37 418 is a generic contact system described, but that does not secure the release position of the firing pin.
  • the invention is based, which Short circuit strength of contact systems for electromagnetic switchgear with quick release by means of improve mechanical means.
  • This object is achieved according to the invention in a contact system Generic type solved in that the dynamic Opening the quick release of the firing pin of the Quick release on which the movable contact pieces supporting plunger can be clamped and by lifting the Ram is detachable.
  • the firing pin when dynamic opening - release status - after a short circuit temporarily with the plunger, which is also the contact bridge and carries the movable contact pieces, jammed, causing him is temporarily held in this position, and thus also the movable contact pieces in one of the Fixed contacts temporarily withdrawn position become.
  • Firing pin provided resilient and expandable fork arm pairs, the outside of the shoulder cams be spread apart while doing the same clamp so that they are held.
  • the is preferred Firing pin on its side facing the plunger as Double fork with one pestle on two each other opposite outer sides with each fork two fork arms of equal length.
  • the forks of the Firing pin are preferably designed to be resilient, so that they spread apart elastically and on the pestle are clampable.
  • the firing pin between the plunger and Housing is clamped in such a way that to the on the plunger formed system and clamping the firing pin Counter bearing is created, the firing pin between Ram and counter bearing is guided.
  • This counter bearing on Housing enables the firing pin clamped to the plunger with a corresponding stroke movement of the ram as a result of To strip the armature movement of the switching magnet again. In the Stroke movement of the plunger moves away from the Firing pin loosening the clamp as the firing pin is held by the counter bearing and overcoming the Allows clamping effect.
  • the jamming surfaces of the fork arms of the firing pin and / or the plunger and / or the housing with a profile, especially grooves or striations that are transverse to the tappet axis run, are equipped.
  • a preferred embodiment of the invention sees the formation of the plunger at the same time as a carrier of the contact bridge and the movable contacts, the contact bridge against the pressure of one in the plunger arranged compression spring is movably mounted in the plunger and on Firing pin trained protruding guide bars in the Triggering state of the firing pin on the contact bridge are movable, and by touching the contact bridge through the Guide bars the contact bridge with the movable Contact pieces is lifted from the fixed contacts.
  • the firing pin is with a Bolt handle formed, at one end a head plate is integrally formed on two opposite one another
  • a fork is formed on each side with two fork arms parallel to the ram longitudinal axis and firing pin longitudinal axis extend and at the other two each other opposite a guide bar in the middle, the also extends parallel to the firing pin axis, is molded.
  • the fork arms are preferably longer than the guide webs trained as the clamping of the firing pin with the help the fork arms in the upper area of the ram, i.e. of the Firing pin takes place during the Guide bars have such a length that they at Movement of the firing pin first the contact bridge with the Touch and lift the movable contact pieces before the Clamp the fork arms on the tappet.
  • the guide webs are also spaced so far apart that without touching the plunger, are guided along during the stroke movement of the firing pin, to lift the contact bridge from the fixed contacts.
  • This thermal protection can take the form of a Insulating plate that is attached to the contact bridge or by forming the firing pin from one high temperature resistant thermoplastic processable plastic or just the formation of the guide bars from one heat-resistant plastic.
  • Fig. 1 the excerpt is schematically in cross section Contact system with movable contact pieces 5 and Fixed contacts 4 of a not shown in the housing 1 housed electromagnetic switch drive with Switching magnet and armature shown.
  • Quick release 6 which is also not shown in detail, connected in series provided an additional Offers protection against currents in the overload area.
  • Quick release 6 of the type used here are known.
  • the quick release is also housed in the housing 1 of the switching device.
  • the firing pin 10 of the quick release 6 is in Fig. 1 in Shown idle state.
  • Fig. 1 represents the normal Contactor operation in which the contacts are closed and the firing pin is not in use.
  • the fixed contacts 4 are connected to terminals 3 with terminal lugs 31.
  • the Firing pin 10 is arranged in the ram longitudinal axis X and in the direction of the arrow P when the quick release 6 is triggered movable.
  • the housing 1 has for the firing pin 10 Opening 2 in a housing partition.
  • the movable contact pieces 5 are on the contact bridge 9 attached, the plunger 90 resiliently movable against the pressure one not shown and in the plunger 90 accommodated compression spring is stored.
  • the pestle is in the Fig. 4 shown in perspective view and he draws is characterized in that it has a hook part 92 with a Push-through opening 92a for taking and the further a carrier part 91 with a push-through opening 98a, b axially parallel to the push-through opening 92a for the contact bridge 9.
  • FIG. 4a shows the front view of the ram 90 in a view of the center of the ram longitudinal axis X arranged one above the other and axially parallel to it mutually extending through opening 92a for taking of the plunger and the push-through openings 98a, 98b for the Inclusion of the contact bridge.
  • FIG. 4b shows the section AA according to FIG. 4a
  • 4f shows the side view of FIG. 4a
  • FIG. 4c shows the Cross section BB according to Fig. 4a and in Fig. 4d the top view Fig. 4a and in Fig. 4e the bottom view of Fig. 4a.
  • Compression spring receives, which on the through the windows 98a, 98b inserted contact bridge 9, see Fig. 1, acts and this holds the contact bridge plane Y indicated in Fig. 4f.
  • the Contact bridge can be through the windows 98a, 98b with the Slits 95a, b connecting the outside can be inserted.
  • the contact bridge 9 is inserted in the plunger 90 State against the pressure of the not shown in the Receiving chamber 94 located compression spring within the Windows 98a, 98b movable in the ram longitudinal axis X.
  • the window 98a, 98b are in the side walls 91a, 91b forming Areas of the carrier part 91 are formed.
  • shoulder cams 93a-d In the transition area between hook part 92 and carrier part 91 are still on the end faces via the guide ribs 96a-96d projecting shoulder cams also arranged in pairs 93a-d. These shoulder cams 93a-d, see Fig. 4e and Fig. 4d are in extension of the guide ribs 96a-d educated. These shoulder cams 93a-d taper like 4f emerges from the side view in the direction of the Firing bolts so that they form a kind of wedge. The Shoulder cams 93a-93d only extend over a part, about 1/3 of the height of the support part 91.
  • the shoulder cams extend in a plane transverse to the longitudinal extent of the Contact bridge and across the ram longitudinal axis on two each other opposite outer sides of the carrier part 91 of the plunger 90.
  • the tip of each of a pair of shoulder cams 93a, 93b or 93c, 93d formed wedge (double wedge) is only so wide that they still between the ends of a fork 11 or 12th of the firing pin can be inserted if it is in the direction of the arrow P is moved.
  • the firing pin 10 of the quick release is in FIG. 3 shown in perspective. It has the bolt handle 13, which is formed at one end with the head plate 15 the guide bars and fork arms are angled so that that they extend axially parallel to the longitudinal axis of the bolt.
  • the guide bars and fork arms are angled so that that they extend axially parallel to the longitudinal axis of the bolt.
  • a fork 11 or 12 with a pair of fork arms 11a, 11b and 12a, 12b trained.
  • On the other two, each other opposite sides is a guide web 14a in the middle, 14b trained.
  • the forks 11, 12 are symmetrical to Center axis formed.
  • Further details of training the Firing pin with two forks are the figures 3a-3d removable, Fig. 3a, the front view of a 3b shows the side view of FIG. 3a, 3c shows the top view of FIGS. 3a and 3d Bottom view on Fig. 3a.
  • the fork arms 12a, 12b, 11a, 11b as can be seen from FIG.
  • the fork arms 12a, b and 11a, b can at least at the end of the Tappet and / or housing facing side with transverse grooves or be provided with another suitable profiling.
  • the guide webs 14a are preferably not of the same length, for example a difference of a few millimeters to tilt the contact bridge when Open, see Fig. 2, to effect.
  • a fork 11 or 12 also remains between the fork arms a respective guide groove 17a and 17b, see Fig. 3c.
  • the firing pin 10 or the plunger 90 can be made of plastic be produced, for example as an injection molded part.
  • Fig. 1 the rest position is in the switched-on state of the switching device and the contacts 4, 5 are closed.
  • the firing pin 10 is in the quick release 6 are also in the rest position and the guide webs 14a, 14b not engaged with the plunger 90 and also the ends of the Forks are not engaged with the shoulder cams of the Ram 90.
  • the fork arms 12a, 12b and 11a, 11b slide on both sides of the plunger 90 on the above wedge-shaped shoulder cams 93c, 93d and 93a, 93b along, causing the fork arms to spread apart, as can be seen be and the firing pin under the occurring Spring action on the shoulder cams 93a, b and 93c, d clamp.
  • To drop the firing pin 10 too avoid is on the opposite side to the Shoulder cams 93a-93d on the housing or a corresponding one Intermediate wall of the housing a guide rib 101a, 101b, 102a, 102b formed, whereby a bottleneck 99a-d between each respective shoulder cams and the guide rib is just for pushing through the individual fork arms is sufficient.
  • 4d is a schematic top view, correspondingly a plan view of Fig. 2, but by 90 ° in the plane rotated, the clamped state of the firing pin by the Fork arms 11a, 11b and 12a, 12b between the shoulder cams 93a-d and the guide ribs 101a, b, 102a, b.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Fixing For Electrophotography (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Selective Calling Equipment (AREA)
  • Valve Device For Special Equipments (AREA)
  • Braking Arrangements (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP95938399A 1994-11-22 1995-11-03 Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser Expired - Lifetime EP0746863B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4441467A DE4441467C2 (de) 1994-11-22 1994-11-22 Kontaktsystem für ein elektromagnetisches Schaltgerät mit Schnellauslöser
DE4441467 1994-11-22
PCT/EP1995/004320 WO1996016423A1 (de) 1994-11-22 1995-11-03 Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser

Publications (2)

Publication Number Publication Date
EP0746863A1 EP0746863A1 (de) 1996-12-11
EP0746863B1 true EP0746863B1 (de) 1999-07-28

Family

ID=6533810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95938399A Expired - Lifetime EP0746863B1 (de) 1994-11-22 1995-11-03 Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser

Country Status (7)

Country Link
EP (1) EP0746863B1 (pt)
AT (1) ATE182718T1 (pt)
BR (1) BR9506638A (pt)
CZ (1) CZ287323B6 (pt)
DE (2) DE4441467C2 (pt)
HU (1) HU219531B (pt)
WO (1) WO1996016423A1 (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540972B4 (de) * 1995-11-03 2005-05-04 Moeller Gmbh Strombegrenzendes Kontaktsystem mit Doppeltunterbrechung für Niederspannungs-Schutzschalter
DE19809205A1 (de) * 1998-03-04 1999-04-15 Siemens Ag Magnetsystem mit Überstromauslösung
US9659726B2 (en) 2013-09-13 2017-05-23 Siemens Aktiengesellschaft Switching device with improved tripping action in the event of a short circuit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2408209A1 (fr) * 1977-11-08 1979-06-01 Telemecanique Electrique Contacteur electro-magnetique equipe d'un electro-aimant sensible aux surintensites pour provoquer la limitation et la coupure des courants excessifs
FR2516304A1 (fr) * 1981-11-09 1983-05-13 Telemecanique Electrique Interrupteur a commande mecanique et ouverture automatique
DE3340904A1 (de) * 1983-11-11 1985-05-23 Westinghouse FANAL-Schaltgeräte GmbH, 5600 Wuppertal Magnetisch betaetigte schaltanordnung, insbesondere luftschuetz
DE3637418A1 (de) * 1986-11-03 1988-05-11 Kloeckner Moeller Elektrizit Schaltvorrichtung
DE3823976A1 (de) * 1988-07-15 1990-01-18 Asea Brown Boveri Verzoegerungseinrichtung
DE3824546A1 (de) * 1988-07-20 1990-01-25 Asea Brown Boveri Elektrischer leistungsschalter
DE3907245C2 (de) * 1989-03-07 1999-07-01 Moeller Gmbh Elektromagnetisches Schaltgerät mit festen und beweglichen Kontaktstücken
DE4322935C2 (de) * 1993-07-09 1995-10-26 Kloeckner Moeller Gmbh Kontaktsystem für ein elektromagnetisches Schaltgerät mit Schnellauslöser

Also Published As

Publication number Publication date
BR9506638A (pt) 1997-09-16
HUT76236A (en) 1997-07-28
ATE182718T1 (de) 1999-08-15
DE59506477D1 (de) 1999-09-02
HU219531B (hu) 2001-05-28
DE4441467C2 (de) 1997-02-27
CZ167696A3 (cs) 1998-09-16
HU9601898D0 (en) 1996-09-30
EP0746863A1 (de) 1996-12-11
WO1996016423A1 (de) 1996-05-30
CZ287323B6 (en) 2000-10-11
DE4441467A1 (de) 1996-05-30

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