WO1996016423A1 - Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser - Google Patents
Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser Download PDFInfo
- Publication number
- WO1996016423A1 WO1996016423A1 PCT/EP1995/004320 EP9504320W WO9616423A1 WO 1996016423 A1 WO1996016423 A1 WO 1996016423A1 EP 9504320 W EP9504320 W EP 9504320W WO 9616423 A1 WO9616423 A1 WO 9616423A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact
- firing pin
- plunger
- contact system
- fork arms
- Prior art date
Links
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 switching device with switching magnets housed in a housing with armature and with a quick release with firing pin, wherein the movable contact pieces are attached to a contact bridge, which in a contact carrier connected to a plunger against the pressure of a compression spring mounted in the contact carrier is movably mounted and the plunger is motion-coupled to the contact carrier with the armature of the switching magnet of the switching device, and the firing pin of the quick release acts on the contact bridge for lifting the movable contact pieces from the fixed contact pieces.
- Magnetically actuated switching elements in particular air contactors, of the design mentioned at the outset are known in a variety of designs, for which reference is made only to DE-OS 33 40 904 and DE-OS 28 48 287, for example.
- the contact pieces are more or less stressed with every type of closing.
- bounce vibrations often occur when the movable contact pieces strike the fixed contact pieces, which leads to undesired contact wear and tear Burn contact.
- the short-circuit strength especially avoiding the
- Damping device accelerates, which increases the risk of welding the contact pieces.
- the contact pieces of switchgear are subject to wear and tear after the dynamic opening due to a short-circuit current, in addition to the regular switching operations.
- each contact bridge carrying the movable contacts is assigned a striking anchor system, which acts on each contact bridge to open the contact points and, moreover, a switch lock on which the striking anchor systems and act on a thermal trigger.
- the contact bridge is acted upon by a lever and intermediate element under the constant action of a spring arrangement, and is held in the release position.
- This system has the disadvantage that a constant force must be constantly applied to the contact bridge in order to hold it in the open position against the compression spring which acts directly on the contact bridge. In the event of shocks or other faults, the contact bridge may close again unintentionally.
- EP 0350 826 A2 describes a contact system for a switching device in which the return of the magnet armature to the starting position is delayed, in such a way that the return path takes place by helical movement of the magnet armature.
- the trigger position is not secured here either.
- DE-OS 36 37 418 describes a generic contact system, which, however, has no securing of the firing pin's release position.
- the invention has for its object the short-circuit strength of contact systems for To improve electromagnetic switching devices with quick release by means of mechanical means.
- This object is achieved in a contact system of the generic type in that when the quick release is dynamically opened, the firing pin of the quick release can be clamped to the plunger carrying the movable contact pieces and can be released by the lifting movement of the plunger.
- the invention starts at the return point or reversal point of the lifted movable contact pieces to increase by slowing the falling back or holding the time until the moving contact pieces on the fixed contact pieces . Even a delay of a few milliseconds that can be achieved with the invention is sufficient, that which is heated and melted by the arc ignited as a result of the short circuit
- the invention can be used effectively against overcurrents in the medium range as well as against high short-circuit currents.
- Advantageous embodiments of the contact system according to the invention can be found in the characterizing features of the subclaims.
- wedge-shaped protruding shoulder cams are formed on the plunger and resilient and expandable fork arm pairs are provided on the firing pin, which are spread apart when the shoulder cams are embraced on the outside and thereby clamp on the same, so that they are held in place.
- the firing pin is preferably designed on its side facing the plunger as a double fork, each with a fork encompassing the plunger on two opposite outer sides, each with two fork arms of the same length.
- the forks of the firing pin are preferably designed to be elastically resilient, so that they spread apart elastically and can be clamped onto the plunger.
- the firing pin can be clamped between the plunger and the housing in the tripped state, in such a way that a counter bearing is created for the contact and clamping of the firing pin formed on the plunger, the firing pin being guided between the plunger and the counter bearing.
- This counter bearing on the housing enables the firing pin clamped on the tappet to be stripped again when the tappet is moved correspondingly as a result of the armature movement of the switching magnet.
- the stroke movement of the plunger it moves away from the firing pin by releasing the clamping, since the firing pin is held in place by the counter bearing and enables the clamping action to be overcome.
- a preferred embodiment of the contact system according to the invention provides for the design of the plunger at the same time as a carrier for the contact bridge and the movable contacts, the contact bridge being movably mounted in the plunger against the pressure of a compression spring arranged in the plunger and projecting guide webs formed on the firing pin when the firing pin is released the contact bridge can be moved, and when the contact bridge is touched by the guide webs, the contact bridge with the movable contact pieces is lifted off the fixed contacts.
- the firing pin is formed with a pin handle, at one end of which a head plate is formed, on which a fork with two fork arms is formed on two opposite sides, which extend parallel to the longitudinal axis of the tappet and the long axis of the firing pin and on the other two opposite sides of each other, a guide web, which also extends parallel to the axis of the firing pin, is integrally formed.
- the fork arms are preferably longer than the guide webs, since the firing pin is clamped with the help of the fork arms in the upper region of the plunger, i.e. area away from the firing pin, while the guide webs have such a length that they only touch and lift the contact bridge with the movable contact pieces when the firing pin moves before the fork arms clamp on the tappet.
- the guide webs are also spaced so far apart that they can pass the tappet without touching it, i.e. are guided along during the stroke movement of the firing pin in order to lift the contact bridge off the fixed contacts.
- Firing pin proposed, see the characterizing part of claim 12.
- This heat protection can be carried out in the form of an insulating plate which is attached to the contact bridge or by forming the firing pin from a high-temperature-resistant, thermoplastically processable plastic or only by forming the guide webs from such a heat-resistant plastic.
- the contact bridge is opened, i.e. Raised by the unevenly long guide bars, tilted, which contributes to the improvement of the short-circuit strength and safety of the opening of the contacts.
- Fig. 1 shows a schematic cross section through a
- Fig. 2 shows the contact system of Fig. 1 after triggering the quick release
- Fig. 3 is a perspective enlarged view of the firing pin
- Ram according to FIG. 4. 1 is a schematic cross-section of the contact system with movable contact pieces 5 and fixed contacts 4 of an electromagnetic switching drive with switching magnet and armature, which is not shown in detail in the housing 1.
- a quick release 6 which is also not shown in more detail, is provided in a row, which offers additional protection against currents in the overload range. Rapid release 6 of the type used here are known.
- the quick release is also housed in the housing 1 of the switchgear.
- the firing pin 10 of the quick release 6 is shown in Fig. 1 in the idle state.
- Fig. 1 shows 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 can be moved in the direction of the arrow P when the quick release 6 is triggered.
- the housing 1 has the opening 2 in a partition wall for the firing pin 10.
- the movable contact pieces 5 are fastened to the contact bridge 9, which is mounted to the plunger 90 in a resiliently movable manner against the pressure of a compression spring (not shown in more detail and accommodated in the plunger 90).
- the tappet is shown in FIG. 4 in a perspective view and it is distinguished by the fact that it has a hook part 92 with a push-through opening 92a for taking it along and also a support part 91 with a push-through opening 98a, t axially parallel to the push-through opening 92a for the Contact bridge 9.
- a pair of shoulder cams 93a, b and 93c, d are formed on each side, between each of which a guide groove 97a, 97b runs from top to bottom on the carrier part 91.
- FIGS. 4a to 4f show the front view of the plunger 90 in a view of the axially parallel to one another, which are arranged one above the other in the middle of the longitudinal axis X of the plunger and transversely thereto push-through openings 92a running to one another for taking the plunger and the push-through openings 98a, 98b for receiving the contact bridge.
- the armature moves with its bridge in the direction of arrow P, see FIG. 1 and takes the contact carrier 90 with it via a driving part inserted into the through opening 92a, as a result of which the movable contacts 5 are lifted off the fixed contacts 4 and thus the switch-off position of the switching device is effected.
- FIG. 4b shows the section AA according to FIG. 4a, in FIG. 4f the side view on FIG. 4a, in FIG. 4c the cross section BB according to FIG. 4a and in FIG. 4d the top view on FIG. 4a and in Fig. 4e the bottom view of Fig. 4a.
- the carrier part 91 of the plunger 90 is equipped with a receiving chamber 94 which is open at the bottom and which receives a compression spring (not shown) which acts on the contact bridge 9 inserted through the windows 98a, 98b, see FIG. 1, and this indicates the one indicated in FIG. 4f Contact bridge level Y holds.
- the contact bridge can be inserted through the slots 95a, b connecting the windows 98a, 98b to the outside.
- the contact bridge 9 can be moved in the plunger 90 in the inserted state against the pressure of the compression spring (not shown) located in the receiving chamber 94 within the windows 98a, 98b in the longitudinal axis X of the ram.
- the windows 98a, 98b are formed in the regions of the carrier part 91 which form the side walls 91a, 91b.
- protruding ribs 96a-d are formed, each of which is provided symmetrically in pairs with a guide groove 97a or 97b in between, in order to enable a corresponding guidance of the plunger 90 in the housing when it moves.
- shoulder cams 93a-d which are also arranged in pairs and protrude above the guide ribs 96a-96d, are also formed on the end faces.
- These shoulder cams 93a-d see FIGS. 4e and 4d, are an extension of the guide ribs 96a-d educated.
- These shoulder cams 93a-d taper towards the firing pin, as can be seen from the side view of FIG. 4f, 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 extension of the contact bridge and transverse to the longitudinal axis of the ram on two opposite outer sides of the support part 91 of the plunger 90.
- the tip of the wedge (double wedge) formed by a pair of shoulder cams 93a, 93b and 93c, 93d is only so wide that it can still be inserted between the ends of a fork 11 or 12 of the firing pin when it is moved in the direction of arrow P. .
- the firing pin 10 of the quick release is shown in perspective in FIG. 3. It has the bolt shaft 13, which is formed at one end with the head plate 15, on which the guide webs and fork arms are angled so that they extend axially parallel to the longitudinal axis of the bolt.
- a fork 11 and 12 with a pair of fork arms 11a, 11b and 12a, 12b are formed on two opposite sides.
- a guide web 14a, 14b is formed in the center of the two other opposite sides.
- the forks 11, 12 are also formed symmetrically to the central axis. Further details of the design of the firing pin with two forks can be found in FIGS. 3a-3d, FIG. 3a showing the front view of a guide web, FIG. 3b the side view on FIG. 3a, FIG. 3c the top view on FIGS. 3a and 3. 3d the bottom view on FIG. 3a.
- the fork arms 12a, 12b, 11a, 11b be formed with a smaller thickness d1 in the upper end area than in their area adjacent to the head plate 15 with the thickness d0.
- the distance a between the forks 12a, 12b and 11a, 11b of a pair of forks 12 and 11 is dimensioned such that an easy passing along or insertion of a pair of shoulders 93a, b and 93c, d is possible with subsequent spreading apart of the fork arms 12a, b or lla, b.
- these can be provided at least in the end area on the side facing the tappet and / or housing with transverse grooves or another suitable profile.
- the pair of guide webs 14a, b arranged in a plane transverse to the fork arms of the firing pin 10 is shorter than the fork arms, since the guide webs 14a, 14b have the task of moving the firing pin 10 in the direction of arrow P in the release state, see FIGS. 1 and 2 to take the contact bridge 9 with the movable contact pieces 5 and separate them from the fixed contacts.
- the guide webs 14a are preferably not of the same length, for example a difference of a few millimeters, in order to cause the contact bridge to tip when opened, see FIG. 2.
- a guide groove 17a and 17b also remains between the fork arms of a fork 11 and 12, see FIG. 3c.
- the firing pin 10 or the plunger 90 can be made of plastic, for example as an injection molded part. It is advantageous here to manufacture at least the guide webs of the firing pin, which may be subsequently connected to it, from a highly heat-resistant plastic in order to provide improved thermal protection in relation to the heat generated by heating the contacts of the contact bridge. It is also possible to on the contact bridge 9 on the to additionally attach insulating plates (not shown) to the guide webs 14a, b of the firing pin 10, see FIG. 2 in order to avoid excessive heating of the guide webs 14a, b.
- Fig. 1 the rest position is shown in the switched-on state of the switching device and the contacts 4, 5 are closed.
- the firing pin 10 is also in the rest position in the quick release 6 and the guide webs 14a, 14b are not in engagement with the plunger 90 and the ends of the forks are also not in engagement with the shoulder cams of the plunger 90.
- the quick release 6 comes into action and the firing pin 10 is moved in the direction of arrow P and takes the contact bridge 9 with the ends of the guide webs 14a, 14b, as a result of which the movable contact pieces 5 are separated from the fixed contacts 4 become.
- the fork arms 12a, 12b and 11a, 11b slide on both sides of the plunger 90 along the projecting wedge-shaped shoulder cams 93c, 93d and 93a, 93b, as a result of which the fork arms are spread apart and the firing pin is pressed against them under the spring action that occurs Clamp shoulder cams 93a, b or 93c, d.
- a guide rib 101a, 101b, 102a, 102b is formed on the opposite side to the shoulder cams 93a-93d on the housing or a corresponding intermediate wall of the housing, as a result of which a bottleneck 99a-d between each respective shoulder cam and the guide rib is formed, which is just sufficient to push the individual fork arms.
- the clamp 101a, 101b, 102a, 102b is formed on the opposite side to the shoulder cams 93a-93d on the housing or a corresponding intermediate wall of the housing, as a result of which a bottleneck 99a-d between each respective shoulder cam and the guide rib is formed, which is just sufficient to push the individual fork arms.
- Fig. 4d is schematically in plan view, corresponding to a plan view of Fig. 2, but rotated 90 ° in the plane, 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 shown.
- the surfaces to be clamped with the fork arms of the firing pin 10 can be provided on the tappet or on the housing with a profile, such as grooves or grooves, preferably transversely to the direction of movement of the fork arms.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9506638A BR9506638A (pt) | 1994-11-22 | 1995-11-03 | Sistema de contato para um aparelho de comutação eletromagnético com dispositivo de disjunção rápida |
EP95938399A EP0746863B1 (de) | 1994-11-22 | 1995-11-03 | Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser |
DE59506477T DE59506477D1 (de) | 1994-11-22 | 1995-11-03 | Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser |
HU9601898A HU219531B (hu) | 1994-11-22 | 1995-11-03 | Érintkezőrendszer gyorskioldóval ellátott elektromágneses kapcsolókészülékhez |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4441467A DE4441467C2 (de) | 1994-11-22 | 1994-11-22 | Kontaktsystem für ein elektromagnetisches Schaltgerät mit Schnellauslöser |
DEP4441467.6 | 1994-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996016423A1 true WO1996016423A1 (de) | 1996-05-30 |
Family
ID=6533810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1995/004320 WO1996016423A1 (de) | 1994-11-22 | 1995-11-03 | Kontaktsystem für ein elektromagnetisches schaltgerät mit schnellauslöser |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0746863B1 (de) |
AT (1) | ATE182718T1 (de) |
BR (1) | BR9506638A (de) |
CZ (1) | CZ287323B6 (de) |
DE (2) | DE4441467C2 (de) |
HU (1) | HU219531B (de) |
WO (1) | WO1996016423A1 (de) |
Families Citing this family (3)
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 |
EP2989653B1 (de) | 2013-09-13 | 2017-05-31 | Siemens Aktiengesellschaft | Schaltgerät mit verbesserter auslösemechanik im kurzschlussfall |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4470028A (en) * | 1981-11-09 | 1984-09-04 | La Telemecanique Electrique | Mechanically controlled switch with automatic opening |
DE3824546A1 (de) * | 1988-07-20 | 1990-01-25 | Asea Brown Boveri | Elektrischer leistungsschalter |
DE4322935A1 (de) * | 1993-07-09 | 1995-01-19 | Kloeckner Moeller Gmbh | Kontaktsystem für ein elektromagnetisches Schaltgerät mit Schnellauslöser |
Family Cites Families (5)
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 |
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 |
DE3907245C2 (de) * | 1989-03-07 | 1999-07-01 | Moeller Gmbh | Elektromagnetisches Schaltgerät mit festen und beweglichen Kontaktstücken |
-
1994
- 1994-11-22 DE DE4441467A patent/DE4441467C2/de not_active Expired - Fee Related
-
1995
- 1995-11-03 AT AT95938399T patent/ATE182718T1/de not_active IP Right Cessation
- 1995-11-03 DE DE59506477T patent/DE59506477D1/de not_active Expired - Fee Related
- 1995-11-03 HU HU9601898A patent/HU219531B/hu not_active IP Right Cessation
- 1995-11-03 CZ CZ19961676A patent/CZ287323B6/cs not_active IP Right Cessation
- 1995-11-03 WO PCT/EP1995/004320 patent/WO1996016423A1/de active IP Right Grant
- 1995-11-03 EP EP95938399A patent/EP0746863B1/de not_active Expired - Lifetime
- 1995-11-03 BR BR9506638A patent/BR9506638A/pt not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4470028A (en) * | 1981-11-09 | 1984-09-04 | La Telemecanique Electrique | Mechanically controlled switch with automatic opening |
DE3824546A1 (de) * | 1988-07-20 | 1990-01-25 | Asea Brown Boveri | Elektrischer leistungsschalter |
DE4322935A1 (de) * | 1993-07-09 | 1995-01-19 | Kloeckner Moeller Gmbh | Kontaktsystem für ein elektromagnetisches Schaltgerät mit Schnellauslöser |
Also Published As
Publication number | Publication date |
---|---|
EP0746863A1 (de) | 1996-12-11 |
CZ287323B6 (en) | 2000-10-11 |
DE4441467A1 (de) | 1996-05-30 |
ATE182718T1 (de) | 1999-08-15 |
HU219531B (hu) | 2001-05-28 |
BR9506638A (pt) | 1997-09-16 |
DE4441467C2 (de) | 1997-02-27 |
EP0746863B1 (de) | 1999-07-28 |
HU9601898D0 (en) | 1996-09-30 |
DE59506477D1 (de) | 1999-09-02 |
CZ167696A3 (cs) | 1998-09-16 |
HUT76236A (en) | 1997-07-28 |
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