EP0338353B1 - Elektrisches Installationsgerät - Google Patents

Elektrisches Installationsgerät Download PDF

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Publication number
EP0338353B1
EP0338353B1 EP89106227A EP89106227A EP0338353B1 EP 0338353 B1 EP0338353 B1 EP 0338353B1 EP 89106227 A EP89106227 A EP 89106227A EP 89106227 A EP89106227 A EP 89106227A EP 0338353 B1 EP0338353 B1 EP 0338353B1
Authority
EP
European Patent Office
Prior art keywords
cover
switching
housing
switching chamber
chambers
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
EP89106227A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0338353A3 (en
EP0338353A2 (de
Inventor
Gerhard Schwarz
Heinrich Hofmann
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.)
ABB AG Germany
ABB AB
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
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 Asea Brown Boveri AG Germany, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0338353A2 publication Critical patent/EP0338353A2/de
Publication of EP0338353A3 publication Critical patent/EP0338353A3/de
Application granted granted Critical
Publication of EP0338353B1 publication Critical patent/EP0338353B1/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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H9/042—Explosion-proof cases

Definitions

  • the invention relates to an explosion-protected electrical switching device according to the preamble of claim 1 and an explosion-protected coupling plug device according to the preamble of claim 7.
  • An explosion-proof electrical switching device of the type mentioned is known from DE-A-26 17 606.
  • This explosion-proof switching device has a cup-like housing part in which a double contact point with two fixed contact pieces and two interacting movable contact pieces attached to a contact bridge is accommodated.
  • the contact bridge itself is connected or coupled to a contact actuating plunger which protrudes from the switching device and can be actuated from the outside, for example by means of a camshaft, when the Switching chamber is housed in a packet cam switch or in a coupling plug device according to DE-A-32 20 840.
  • the one-sided open side of the cup-like housing is closed by means of a cover, which is then cast in from the outside with casting resin.
  • the fixed contact pieces are pressed into the bowl-like lower part of the housing during manufacture, which entails an increased manufacturing outlay.
  • the switching chamber is installed in a cam switch, then the switching chambers surround the camshaft or penetrate the space between the switching chambers, so that the switching chambers are actuated or switched from the inside. This is disadvantageous in particular when a plurality of switching chambers are installed in a coupling socket of a coupling plug device because the switching capacity is relatively low.
  • the object of the invention is to provide a switching chamber of the type mentioned, the manufacture of which is considerably simplified even with high switching power and which, moreover, can also be used more easily in a coupling plug device.
  • the housing of the switching chamber has two parts which can be put into one another, namely a cup-like housing and a cover, the fixed contact pieces attached to the tabs inserted in the cover being practically cast together with the cover after being placed in the cover and thus fixed.
  • the cover has L-shaped depressions on the surface away from the contact space, in which the tabs are inserted.
  • circumferential pointed edges, cutting edges are formed on the cover in accordance with the characterizing features of claim 6, which effect a seal between the cover and the contact space.
  • the switching chamber according to the invention is then installed in the coupling socket in such a way that the switching plunger projects radially outward from the housing, so that for actuation it is not possible to use a camshaft located inside, but a cam cylinder encompassing the individual switching chambers assigned to the phase conductors, as a type of drive shaft .
  • the switching chamber or contact space is not delimited by an independently pressure-tight encapsulated housing, but is formed within the plug device when it is assembled.
  • the housing of a switching chamber 100 (see FIG. 8) consists of an elongated rectangular housing bowl 10 and a cover 30 which, in the assignment as shown by the illustration in FIG. 7 with reference to FIG. 2, thus with edges 51 and 52 is inserted first into the housing bowl 10 (see below).
  • the housing bowl 10 is open on one side and has a base region 11, a bore 13 being provided on one of the longer side walls, in FIG. 1 of the upper side wall 12, through which, as in FIG an actuating plunger 14 for a contact bridge 15 extends through.
  • two pockets 16, 17 and 18 and 19 are formed, which are separated from one another by a web 20 or 21 in the middle of the narrow or short side walls;
  • pins 22 and 23 which are perpendicular to the bottom and which are made of a material which releases an extinguishing gas when exposed to an arc, so that the four pins serve as an arc extinguishing aid.
  • the actuating plunger 14 has an extension 24 at its end located inside the housing or the cup-like housing part, which extends through a bore 25 of the contact bridge 15, the extension 24 being smaller in its outer diameter than the actuating plunger 14, as a result of which a shoulder 26 is formed against which the contact bridge 15 is pressed.
  • the pressure force and the contact pressure force are generated by a contact pressure spring 27.
  • the contact bridge 15 carries two movable contact pieces 28 and 29.
  • the housing bowl 10 according to FIGS. 1 to 3 is closed by means of the cover 30, which has a plate-like region 31, on which projections 32, 33 and 34 are provided, which protrude perpendicularly from one side of the cover 30 and are thus approximately L-shaped Form channels 35 and 36, of which a channel section (see FIG. 4) extends to one longer side edge, whereas the other leg of the L-shape is exposed to the shorter side.
  • L-shaped depressions are provided symmetrically to the central axis or at least approximately symmetrically to the central axis, which corresponds to the central axis of the bore 13, the to the long side edge pointing and thus parallel to the central axis leg of the recess each open into a recess 37 and 38 on the longitudinal side edge, whereas the other legs perpendicular to the central axis each to the adjacent narrow side edges.
  • the two depressions, ie the channels 35 and 36, receive tabs 39 and 40, which tabs have a region 41 which is adapted to the L-shape of the two depressions 35 and 36.
  • the L-shape of this area 41 lies in its own plane.
  • the L-shape is connected on the one hand by the recesses 37 and 38, which extend perpendicularly to the cover 30 and protrude from the recesses 35 and 36 opposite side of the cover, first angled portions 42 and 43, and on the legs that lead to the shorter side edges run, also downwards, ie in the same direction as the first bends 42 and 43, second bends 44 and 45 are formed; the bends 44 and 42 or 43 and 45 are thus each perpendicular to the L-shape, that is to say the area 41, and also perpendicular to one another.
  • connecting lugs 46 and 47 run perpendicular to it and parallel to one another.
  • the bends 44 and 45 and the connecting lugs 46 and 47 lie outside the circumferential contour of the cover 30 and 31, respectively.
  • the cover 30 has tapered cutting edges 50 on its longitudinal edges and further cutting edges 51 and 52 on the shorter side edges opposite the edges 50 from the cover plane 31.
  • the cover 30 in the drawing in FIG. 7 is shown assigned to the housing bowl 10 (FIG. 2) in the same way as it is inserted into the housing bowl 10.
  • the cutting edges 51 and 52 and 50 engage in the interior of the cup-like housing 10 and lie on non-numbered shoulders provided in the housing cup in order to achieve a tight seal.
  • the fixed contact pieces 48, 49 with the connecting tabs 46 and 47 are used.
  • the tabs 39, 40 are inserted into the recesses 35, 36 as shown in FIG. 4 and the unit consisting of tabs 39 and 40 and cover 30 is thus inserted into the housing bowl 10.
  • This pressure-resistant switching chamber space which, as can be seen from FIG. 3, has two nose-like formations 53 and 54 on its two side surfaces running parallel to the switching plunger 14, is housed in a housing 61 in a housing 61 (FIG. 9) together with other, equally designed switching chamber spaces inserted, which housing 61 is part of the explosion-proof coupling socket shown in Figure 8 or 10.
  • the coupling socket according to FIG. 8 thus comprises the housing 61 (see also FIG. 9), a further housing 62 which is connected to the housing 61 via screw connections 63, a socket body 64 which is connected to the housing 61 by means of a screw 65, and a driver 66 and a cam cylinder 67 between the housing 61 and the socket body 64.
  • sockets 68 which cooperate with the plug pins of a plug (not shown) or into which the plug pins can be inserted.
  • the driver ring or driver 66 which comprises the socket body 64 at its end facing away from the socket openings 69, has collar-like, axial projections 70 on its socket-side surface, which have at least one slot-like recess 71, and the driver 66 has on the side facing away from the socket openings distributed around the circumference, projecting in the axial direction, pegs 72 which cooperate with a spring 74 arranged within an annular groove 73 of the cam cylinder 67, with a spring mechanism (not shown in more detail) with which the cam cylinder 67 is rotated when the driver 66 is rotated.
  • the housing 61 has a housing plate 75 (also known as plate 75 for short), on the surface of which is on the socket side, a central guide post 76 is formed, which has a central opening 77 through which the screw 65 extends. Furthermore, the plate 75 has circumferentially distributed housing projections 78 which project in the same direction as the guide post 76, which, as can be seen from FIG. 9, form a triangular shape, with opposing walls each having a groove 79 and 80, which correspond to the lugs 53 and 54 are adjusted. The gaps between two projections 78 thus serve to guide the switching chambers according to FIGS. 1 to 7. As a result, the switching chambers are held in a form-fitting manner within the housing 61.
  • the housing plate 75 has, on the side on which the projections 78 are formed, a rim 81, which is cylindrical and surrounds the housing projections 78 and, as can be seen from FIG. 8, serves to guide the cam cylinder 67 insofar as the cam cylinder 67 comprises the rim 81 with its end remote from the socket. It can be seen that the actuating plunger 14 protrude outwards from the switching chambers; In this area there is the cam surface 82 of the cam cylinder 67 and this cam surface controls the position of the actuating plunger 14 and thus the switching position of the switching chambers when the cam cylinder 67 is rotated.
  • the plug of an explosion-protected plug-in device has a collar with a nose which projects radially outward on its free edge.
  • This collar engages in the space 83 between the housing 62 and the outer surface of the socket body 64, one in the housing 62 axially extending groove 84 is formed, in which the nose of the plug can slide when the plug is inserted with its collar into the space 83.
  • the nose then engages in the recess 71 and in this way can be rotated by turning the collar of the driver 66, whereby the spring mechanism is tensioned with the spring 74 via the pin 72 and released after a certain rotation, so that over the cam surface 82 the actuating plunger 14 are actuated.
  • the assignment should be selected so that the switching chambers are switched off before inserting the plug with the plug pins into the sockets 68, so that an arc is not drawn by inserting the plug between the sockets and the plug pins, which ignite any explosive gases that may be present can.
  • the contact between the socket and the connector pins is therefore voltage-free.
  • the collar of the plug is then rotated, whereby the driver 66 is rotated; the switching chambers are switched on and electrical energy can then flow through the coupling plug device.
  • the bushings 68 have connecting pieces 86 which are coupled to the connecting lugs 87 (see FIG. 8) and 47 (see FIG. 4).
  • the other connecting lugs 88 each pass through a rectangular opening 89 in the support plate 75 of the housing 61 and can then be connected to connecting terminals 90 (not shown in detail, only indicated schematically).
  • the outer surface of the guide post 76 has an axially extending groove 91 which continues into an opening 92 in the housing plate 75; As can be seen from FIG. 8, a flat ribbon conductor (conductor rail) 93 is inserted into this groove 91, which is riveted to the socket 68a and passes through the opening 92 and thereby projects beyond the housing plate 75. The neutral or PEN conductor is then connected to this rail 93.
  • the central opening 77 is surrounded by a collar 94, which also surrounds the head 95 of the screw 65, and the conductor rail 93 also projects beyond the collar 94.
  • the connecting terminals 90 are located in an end cover 96 which is firmly connected to the housing plate 75 by means of screw connections 97 with an axially projecting cylinder edge 98.
  • the housing 62 is connected to the housing 61 via the screw connection 63 and the screw 65 or the screw bolt 65 is used to hold the housing 61 and the plug body 64 together.
  • the bushing openings 69 are closed by means of a cover 99, which is articulated on the housing 62 at a joint 100 and is continuously folded into the position shown in FIG. 8 by means of a spring (not shown).

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP89106227A 1988-04-16 1989-04-08 Elektrisches Installationsgerät Expired - Lifetime EP0338353B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812732A DE3812732A1 (de) 1988-04-16 1988-04-16 Elektrisches installationsgeraet
DE3812732 1988-04-16

Publications (3)

Publication Number Publication Date
EP0338353A2 EP0338353A2 (de) 1989-10-25
EP0338353A3 EP0338353A3 (en) 1990-08-16
EP0338353B1 true EP0338353B1 (de) 1994-06-01

Family

ID=6352145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106227A Expired - Lifetime EP0338353B1 (de) 1988-04-16 1989-04-08 Elektrisches Installationsgerät

Country Status (4)

Country Link
EP (1) EP0338353B1 (es)
AT (1) ATE106602T1 (es)
DE (2) DE3812732A1 (es)
ES (1) ES2054917T3 (es)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1590624B1 (de) * 1966-10-28 1971-03-11 Stotz Kontakt Gmbh Explosionsgeschuetzter Schalter
DE2217218C2 (de) * 1972-04-10 1982-09-02 Siemens AG, 1000 Berlin und 8000 München Kontaktfedersatz für ein elektromagnetisches Karten-Relais in Flachbauweise und Verfahren zur Herstellung desselben
DE2359752C3 (de) * 1973-11-30 1984-09-27 Brown, Boveri & Cie Ag, 6800 Mannheim Explosionssichere Kupplungssteckvorrichtung
DE2617606C3 (de) * 1976-04-22 1980-05-14 Brown, Boveri & Cie Ag, 6800 Mannheim Explosionsgeschutzter Paketnockenschalter
DE3215919C2 (de) * 1982-04-29 1986-09-04 Brown, Boveri & Cie Ag, 6800 Mannheim Explosionsgeschütztes oder schlagwettergeschütztes elektrisches Schaltgerät
DE3220839C2 (de) * 1982-06-03 1985-04-18 Brown, Boveri & Cie Ag, 6800 Mannheim Explosions- oder schlagwettergeschützte Steckvorrichtung
DE3220840C2 (de) * 1982-06-03 1985-04-25 Brown, Boveri & Cie Ag, 6800 Mannheim Druckfest gekapseltes, explosionsgeschütztes elektrisches Schaltgerät
DE3220915C2 (de) * 1982-06-03 1985-05-23 Brown, Boveri & Cie Ag, 6800 Mannheim Explosionsgeschützter oder schlagwettergeschützter Paketnockenschalter
DE8304932U1 (de) * 1983-02-23 1984-10-31 Kapfer, Karl, 7108 Möckmühl Explosionssicherer Leuchtschalter und Leuchttaster

Also Published As

Publication number Publication date
EP0338353A3 (en) 1990-08-16
ES2054917T3 (es) 1994-08-16
EP0338353A2 (de) 1989-10-25
ATE106602T1 (de) 1994-06-15
DE3812732A1 (de) 1989-10-26
DE58907734D1 (de) 1994-07-07

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