EP0146034B1 - Anordnung zum Abschalten von Verbrauchern - Google Patents

Anordnung zum Abschalten von Verbrauchern Download PDF

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Publication number
EP0146034B1
EP0146034B1 EP84114393A EP84114393A EP0146034B1 EP 0146034 B1 EP0146034 B1 EP 0146034B1 EP 84114393 A EP84114393 A EP 84114393A EP 84114393 A EP84114393 A EP 84114393A EP 0146034 B1 EP0146034 B1 EP 0146034B1
Authority
EP
European Patent Office
Prior art keywords
contact
arrangement
trip
slide
plate
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
EP84114393A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0146034A2 (de
EP0146034A3 (en
Inventor
Werner Dipl. Ing. Harbauer
Günter Gnahn
Erwin Flierl
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
Priority claimed from DE19833343906 external-priority patent/DE3343906A1/de
Priority claimed from DE19843414758 external-priority patent/DE3414758A1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT84114393T priority Critical patent/ATE29799T1/de
Publication of EP0146034A2 publication Critical patent/EP0146034A2/de
Publication of EP0146034A3 publication Critical patent/EP0146034A3/de
Application granted granted Critical
Publication of EP0146034B1 publication Critical patent/EP0146034B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • H01H2003/002—Means for preventing or breaking contact-welding with lockout, e.g. two contact pairs in series

Definitions

  • the invention relates to an arrangement for the two-pole or multi-pole connection and disconnection of consumers, preferably of domestic appliances, by means of a drive that can be actuated by driving, spring-loaded contact parts of two separate contact systems that can be brought into contact with fixed contact parts.
  • the two separate contact systems each consist of separately movable, movable contact slides loaded with restoring spring force, one of which can be brought into operative connection with the two contact parts via different drivers.
  • This makes it possible to open the circuit for welded contact parts and thus e.g. to switch off the faulty heating circuit.
  • the following faults are not recorded: The short to ground with fire risk is not noticed, so that welding the still intact contact leads to a dangerous fault, namely that the heating is not switched off.
  • the reactivation of the single-pole remote-controlled switching device would lead to a new short circuit with further consequential damage.
  • the invention is therefore based on the object, in an arrangement of the type mentioned above, to ensure in a simple manner that the faulty contactor is prevented from being switched on again. This is achieved in a simple manner in that, depending on the relative movement between a welded contact part and the drive moving in the opening direction of the contacts, the drive is locked in the switch-on direction.
  • transformer control switches with a separate tap changer and load switch, it is known per se (AT-B-171618) that, due to complex, intermediate spring mechanisms, a fault either occurs the next time the switch is attempted, or if the fault occurs only during operation, to be displayed while the switch is being blocked at the same time.
  • the locking consists of a hook-shaped bent tongue on the movable contact part, which engages spring-loaded in a recess in the contact carrier forming the drive.
  • the hook-shaped bent tongue is formed by a tab cut out from a leaf spring.
  • a symmetrical construction of the switching device with regard to the fixed contact pieces becomes possible if the entrainment is arranged in a plate-like manner with the narrow side walls facing one another on one side of the plate, each with a cage-shaped projection that guides the contact bridge, one half of which projects beyond the other plate, whereby the formation of one plate in the direction of movement of the driver is behind that of the other plate.
  • the fixed contact parts can be fastened in a simple manner in a cover part opposite the plates for the switching device symmetrically to the central axis if the longitudinal direction of the contact bridges run parallel to the surface of the one plate side.
  • a compact structure for the arrangement can be achieved by coordinating the ways of driving in such a way that, in the event of a fault, driving is supported on the inside wall of the housing immediately after the closing pressure has passed through the slide end and thus limits the activation of the other, undisturbed driving so closely that no contact can be made.
  • the arrangement shown in the drawing for two-pole or multi-pole switching off of consumers 1, in the present case the heating of the washing machine, consists of the leaf springs 2, 3, one fixed side 4 or 5 of which is connected to the supply lines R and MP and the other movable side 6, 7 is provided with the contact pads 8, 9, which together with the fixed contact parts 10, 11 form the contact.
  • the middle parts 18, 19 of the leaf springs 2, 3 come to rest with edges 20, 21 of the recesses 22, 23 in the slide-shaped drive 12.
  • Hook-shaped bent tongues 24 are formed on the leaf springs, which in the normal case resiliently rest on the sliding surface 25 of the slide-shaped drive.
  • the armature 15 picks up and causes the slide-shaped drive 12 to move in the direction of the arrow 14; the contacts are closed. If, for example, welding now occurs between the contact pad 9 and the fixed contact part 11, the leaf spring 3 remains in the bent, i.e. the contact closing position.
  • the back pressure spring 13 pushes the slide-shaped drive 12 against the direction of the arrow 14, separates the contact pad 8 from the fixed contact part 10, so that the circuit is opened with one pole. Due to the relative displacement between the slide-shaped drive 12 and the leaf spring 3, the tongue 26 of the leaf spring 3 snaps into a recess 27 in the slide-shaped drive 12.
  • the slide-shaped drive 12 moves in the direction of the arrow 14 excluded, since the leaf spring 3 rests on the contact part 9 on the fixed contact part 11 and thus prevents the movement of the slide-shaped drive 12 by the contact of the tongue 26 on the edges of the recess 27.
  • the drive is locked in the switch-on direction in a simple manner.
  • the tongue 28 causes the locking in an equivalent manner by snapping into the recess 29 in the slide-shaped drive 12, whereas the electrical separation is effected by lifting the contact pad 9 off the fixed contact part 11. It is practically only possible to switch on the arrangement after the welding has been removed by a specialist, for example by replacing the contact parts.
  • FIG. 3 shows a further embodiment of the arrangement according to the invention.
  • the tongues 26, 28 are formed by a flap being removed.
  • the leaf springs 2, 3 are guided in window-shaped recesses 30, 31 which correspond to the recesses 22, 23 of the drive according to FIGS. 1 and 2.
  • the latching recesses for the tongues are designated by the reference numerals 32, 33 in the exemplary embodiment according to FIG. 4.
  • Fig. 3 shows the locked position of the arrangement; the tongue 26 is engaged in the locking recess 32.
  • the drive 12 cannot move, even though the coil 17 is under voltage, which attempts to attract the armature 15, since the leaf spring 2 rests on the fixed contact part 10 via the contact pad 8.
  • two separate contact slides 34, 35 are operatively connected to contact bridges 36, 37.
  • the contact slides 34, 35 are displaced in the longitudinal direction by separate hinged armature parts 38, 39, which cooperate with the magnet (not shown in any more detail), as a result of which the contact bridges 36, 37 lie on the fixed contact parts 40 with their supports.
  • Each of the two contact slides 34, 35 is loaded with a return spring 41 return spring force.
  • the contact pressure spring for the contact bridges 36, 37 have the reference symbol 42.
  • the contact slide 34 is provided with a locking slide 43 which is spring-loaded in a cage 44 via the spring 45 in the direction of the other contact slide 35.
  • the locking slide 43 can engage with its free end in recesses 46, 47 of the contact slide 35, provided that a relative movement between the two contact slides 34 and 35 has occurred by a corresponding amount.
  • the hinged armature parts 38, 39 are tightened so that the contact slides 34, 35 move on both sides in the sense of the compression of the back pressure springs 41 until the supports of the contact bridges 36, 37 with the fixed contact parts 40 in contacting connection.
  • the contact pressure springs 42 are tensioned; the contact bridges 36, 37 each protrude through window-shaped openings 48 in the contact slide not supporting the contact pressure spring for the corresponding contact bridge, so that a relative movement between the two contact slides 34, 35 is possible. If, for example, the contact bridge 36 welds to the supports with the fixed contact parts 40, the contact slide 34 is only moved until the contact bridge 36 abuts the slide edge.
  • the contact slide 35 can move back freely since the hinged anchor part 39 is independent of the hinged anchor part 38.
  • the contact points formed by the contact bridge 37 with the fixed contact parts 40 are opened and afterwards the locking slide engages in the recess 46. It can be seen that when the magnet is re-energized, the hinged armature part 39 is blocked in its switch-on direction by the contact slide 35. A restart of the power circle is only possible when the welded contact bridge has been repaired.
  • the recess 47 is used for locking, provided that the contact bridge 37 is welded to the fixed contact part 40. The effect is basically the same.
  • the slides 34, 35 are locked in the case of welded contacts by latching projections 49.
  • the latching projections are designed here in the form of wedge-shaped projections, in such a way that, depending on the width of the slide, two slides lying next to one another on each slide oppositely acting, wedge-shaped surfaces are present, so that when the slide 34 moves relative to the contact slide 35 or vice versa, one contact slide moves relative to the other transversely to its longitudinal movement. If the edge 50 of one contact slide latches with the edge 51 of the other contact slide, the locking of the two contact slides 34, 35 corresponding to the locking slide according to FIG. 5 has taken place.
  • the back pressure springs 41 in the example according to FIGS. 6 to 13 are arranged at a certain angle to the longitudinal direction of the contact slide. Normally, the inclined planes of the wedge-shaped projections of both slides lie on top of each other, and both slides move by the same amount at the same time, so that there is no transverse displacement.
  • the drivers or slides 34, 35 are plate-shaped.
  • a cage-shaped projection 52 is provided on the slide 34 and a cage-shaped projection 53 is provided on the slide 35.
  • FIG. 8 shows, one half of the cage-shaped projections protrude over the surface 54 of the other slide.
  • contact bridges 36, 37 are introduced, which are spring-loaded via contact pressure springs 56, 57.
  • the contact pressure springs can be introduced into the cage-shaped projections through the openings 58.
  • the contact bridges 36, 37 run parallel to the surfaces 54 of the slide 34, 35 and work together with the fixed contact parts 40, which e.g.
  • FIGS. 9 to 13 show the off position, i.e. the two hinged anchor parts 38, 39 are not attracted to the magnet system 60.
  • the contact bridges 36, 37 are not connected to the fixed contact parts 40.
  • FIG. 10 shows the on position. The hinged anchor parts 38, 39 have been attracted to the core of the magnet system 60.
  • the contact bridges rest against the fixed contact parts 40 under spring tension of the contact pressure springs 58.
  • 11 shows the situation of the welded contact bridge 37 with the fixed contact parts 40.
  • the slide 35 moves in the switch-off direction until the contact bridge rests against the end wall of the window 55, so that the movement is stopped.
  • the slider 34 can continue to move. It effects the separation of the contact bridge 36 from the fixed contact parts 40.
  • a lateral pivoting is possible by the corresponding design of the slide.
  • the latching projections 49 effect this pivoting until the edge 50 of one contact slide latches with the edge 51 of the other contact slide.
  • the locking takes place by the direction of action of the back pressure springs 41 in the angle described above.
  • the slide 34 is pivoted into the position shown in FIG. 12.
  • the hinged anchor parts 38, 39 are tightened.
  • the hinged armature part 39 can only travel a short distance until an extension 63 of the slider 35 abuts the housing wall, and the hinged armature part 38 can only slide the slider 34 until the edge 50 of one contact slide contacts the edge 51 of the other Move the contact slide. It can be seen that a reclosure of the non-welded contacts is prevented with certainty.

Landscapes

  • Push-Button Switches (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Refuse Collection And Transfer (AREA)
  • Breakers (AREA)
  • Tumbler Switches (AREA)
EP84114393A 1983-12-05 1984-11-28 Anordnung zum Abschalten von Verbrauchern Expired EP0146034B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84114393T ATE29799T1 (de) 1983-12-05 1984-11-28 Anordnung zum abschalten von verbrauchern.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3343906 1983-12-05
DE19833343906 DE3343906A1 (de) 1983-12-05 1983-12-05 Anordnung zum abschalten von verbrauchern
DE19843414758 DE3414758A1 (de) 1984-04-18 1984-04-18 Anordnung zum abschalten von verbrauchern
DE3414758 1984-04-18

Publications (3)

Publication Number Publication Date
EP0146034A2 EP0146034A2 (de) 1985-06-26
EP0146034A3 EP0146034A3 (en) 1985-07-24
EP0146034B1 true EP0146034B1 (de) 1987-09-16

Family

ID=25816165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114393A Expired EP0146034B1 (de) 1983-12-05 1984-11-28 Anordnung zum Abschalten von Verbrauchern

Country Status (6)

Country Link
EP (1) EP0146034B1 (da)
DE (1) DE3466316D1 (da)
DK (1) DK573884A (da)
ES (1) ES538298A0 (da)
FI (1) FI78194C (da)
NO (1) NO844818L (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3617832A1 (de) * 1985-08-22 1987-02-26 Paul & Siedler Gmbh & Co Kg Elektromagnetisches relais
EP0921543A1 (en) * 1997-11-21 1999-06-09 Signal Lux Italia S.p.A. Electric safety switch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT171618B (de) * 1950-09-15 1952-06-25 Elin Ag Elek Ind Wien Einrichtung an Transformatorregelschaltern mit getrenntem Stufenwähler und Lastschalter sowie dazwischenliegendem Sprungwerk zur Sperrung bei Störung der Bewegung des Lastschalters
DE1055102B (de) * 1956-06-21 1959-04-16 Wickmann Werke Ag UEberstromschalter
GB896401A (en) * 1957-05-21 1962-05-16 Dowty Electrics Ltd Improvements in electromagnetic multi-contact relays
DE2705330C2 (de) * 1977-02-09 1983-10-27 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer Schalter, insbesondere Motorschutzschalter
DE2905243C2 (de) * 1979-02-12 1982-10-21 Siemens AG, 1000 Berlin und 8000 München Anordnung zum Öffnen von Stromkreisen
DE3213493A1 (de) * 1982-04-10 1983-10-13 Klöckner-Moeller Elektrizitäts GmbH, 5300 Bonn Elektrischer schalter fuer niederspannungsschaltgeraete, insbesondere motorschutzschalter

Also Published As

Publication number Publication date
DE3466316D1 (en) 1987-10-22
FI78194C (fi) 1989-06-12
FI844776A0 (fi) 1984-12-04
EP0146034A2 (de) 1985-06-26
ES8604002A1 (es) 1986-01-01
EP0146034A3 (en) 1985-07-24
FI844776L (fi) 1985-06-06
DK573884D0 (da) 1984-12-04
NO844818L (no) 1985-06-06
FI78194B (fi) 1989-02-28
DK573884A (da) 1985-06-06
ES538298A0 (es) 1986-01-01

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