EP0289447B1 - Dispositif de sectionnement pour rails à courant élevé - Google Patents

Dispositif de sectionnement pour rails à courant élevé Download PDF

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Publication number
EP0289447B1
EP0289447B1 EP88730091A EP88730091A EP0289447B1 EP 0289447 B1 EP0289447 B1 EP 0289447B1 EP 88730091 A EP88730091 A EP 88730091A EP 88730091 A EP88730091 A EP 88730091A EP 0289447 B1 EP0289447 B1 EP 0289447B1
Authority
EP
European Patent Office
Prior art keywords
contact
plug
isolating device
switch
current rails
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
EP88730091A
Other languages
German (de)
English (en)
Other versions
EP0289447A1 (fr
Inventor
Georg Garstka
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0289447A1 publication Critical patent/EP0289447A1/fr
Application granted granted Critical
Publication of EP0289447B1 publication Critical patent/EP0289447B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/08—Short-circuiting members for bridging contacts in a counterpart

Definitions

  • the invention relates to a disconnecting device for high-current rails, in which the high-current rails are at least partially opposed to one another with a plug-in contact that can be inserted between the high-current rails, that has contact blades on the surfaces facing the high-current rails, and that contains an isolated signaling switch to which the plug contact is located in its intended end position with a surface facing it comes to the system and thereby brings the signaling switch by overcoming the actuation path when inserted into a certain switching position, the plug contact being insulated from the signaling switch by an insulating part.
  • a separation device for high-current rails is known from a publication by Multi-Contact AG, Basel, published as a special print from "Technische Rundschau" 36 and 43, 1975, image 9 on page 3.
  • the known disconnecting device for high current rails contains an isolated alarm switch. When the plug contact is completely and correctly inserted, this is brought into a certain switching position by overcoming the actuation path and reports that the plug contact is fully inserted and thus the full cross section of the plug contact is available for the current transmission.
  • the surface of the plug contact facing the signaling switch it is customary to provide the surface of the plug contact facing the signaling switch with an insulating part. Inadmissible heating of the disconnection device, in particular the insertable plug contact, is not detected by the message provided in the known disconnection device of the correct end position of the plug contact. Inadmissible heating occurs e.g. B. then when the contact resistance between high-current rails and plug contact due to contamination of the contact blades or decreasing contact pressure are too large.
  • the present invention has for its object to provide a less expensive device for reporting an impermissibly high heating of disconnecting devices for high-current rails of the type described above.
  • a plant part made of low-melting material is attached, the melting point of which is above the normal operating temperature and below the permissible limit temperature of the disconnecting device , and the system part protrudes beyond this surface in the direction of the signaling switch by a height which corresponds at least to the actuation path of the signaling switch, and the plug contact is applied to the signaling switch only via the system part and the insulating part.
  • a temperature-sensitive element is connected between the plug contact located in its end position and the signaling switch indicating this end position.
  • the system part melts and thereby releases a space at least corresponding to the actuation path of the signaling switch on the surface of the plug contact facing the signaling switch.
  • the signaling switch moves into a different switching position.
  • This gives the signaling switch an additional temperature-dependent function which, when the predetermined melting point of the material of the system part coordinated with the permissible operating and limit temperature of the separating device is exceeded, provides a temperature-dependent signal by actuating the signaling switch, although the end position of the plug contact remains unchanged.
  • This new function of the signaling switch can advantageously be used to counteract inadmissible heating and possible destruction of the separating device, for example by interrupting the current flow.
  • the movement of the signaling switch takes place against the insertion direction of the plug contact when the system part melts. It is therefore expedient to design the plug contact on the surface facing the signal switch in such a way that the mounting of the insulating part contains spring elements which press the insulating part against the contact surface of the system part consisting of material melting at low temperature. As a result, the movement of the insulating part against the end face of the plug contact is supported by the force of the spring elements when the system part melts. This action of the spring force is independent of the actuating force of the alarm switch itself, which ensures its actuation in any case.
  • the system part is a bolt which is inserted in a hole in the end face of the plug contact facing the signaling switch.
  • a bolt can be easily prefabricated, can be inserted into the plug contact without any further production outlay and can easily be renewed after melting.
  • the plug contact has at least one further hole, which connects a surface without contact lamellae of the plug contact with the hole for receiving the bolt. This creates an outlet channel for the molten material of the plant part, which enables the melt to flow out specifically on a surface of the plug contact of the separating device that does not belong to the contact surfaces. Contamination of the particularly sensitive contact blades is thus avoided.
  • the system part It is also advisable to manufacture the system part from metal that melts at low temperature and has a melting point of 70 ° C.
  • metal As the material for the contact part, even if the contact surfaces are contaminated by the melt of the contact part, there can be no significant increase in the contact resistance at the contact surfaces, because such contamination only increases the contact resistance of the contact surfaces only insignificantly.
  • the melting point of which is 70 ° C
  • a particularly simple coordination of the melting temperature of the system part with the normal operating temperature of the separating device and its highest, permissible limit temperature is possible, since the operating temperature is below 70 ° C and the permissible limit temperature is around 80 to 85 ° C. It is advisable to manufacture the system part from a bismuth-lead-tin-cadmium alloy, since this material meets the requirements for a suitable melting temperature.
  • FIGS. 1 to 3 shows a top view of a disconnecting device constructed according to the invention for several high-current bars without the insertable plug contact.
  • Fig. 2 shows a section of the separating device along the section line II-II in Fig. 1 with an inserted plug contact.
  • Fig. 3 the plug contact is shown partially in section.
  • Figures 1 and 2 show a separating device for high-current rails 1, as z. B. for the power supply large DC motors is used.
  • the high-current rails 1 are parallel to one another and extend over a greater length. The ends of the high-current rails 1 overlap, so that the high-current rails 1 are partially opposite each other there.
  • the high-current rails 1 are supported by spacers 2, 3 made of insulating material against one another and against the brackets 4 carrying them, and are braced with one another and with the brackets 4 by bolts 5 and nuts 6.
  • a space 7, 8 is formed between the outer and the middle high-current rail 1.
  • the plug contact 9 is optionally inserted into one of the two spaces 7, 8 by means of its handle 10. It is shown pushed into the left space 7 in FIG. 2.
  • a web 11 is attached to the outer spacers 3 made of insulating material and carries the signaling switches 12, 13, which are assigned to the spaces 7, 8 between the high-current rails 1.
  • An insulating part 14 is provided between the plug contact 9 and the signaling switch 12, by means of which the high-current plug contact 9 is electrically isolated from the signaling switch 12.
  • the plug-in contact 9 inserted into the left space 7 is in contact with the signaling switch 12 and has brought it into the switch position corresponding to the end position of the plug-in contact 9, the system being carried out only via the system part 16 attached to the end face 15 of the plug-in contact 9 and the insulating part 14.
  • the signaling switch 13 assigned to the right space 8 between the high-current rails 1 is shown in the switch position as it is when the plug contact 9 is not inserted.
  • Fig. 3 the plug contact 9 is shown in a position rotated by 90 ° relative to Fig. 2, so that one of the contact surfaces 17 is visible, which bears against a high-current rail 1 after the plug-in contact 9 has been inserted.
  • inclined contact lamellae 18 are attached to the contact surface 17.
  • the insulating part 14 is fastened to the lower end face 15.
  • stud bolts 19 which are screwed into bores 20 in the end face 15.
  • springs 22 which press the insulating part 14 in the direction of the end face 15.
  • the contact part 16 is used, which has the shape of a bolt or circular cylinder.
  • the surface of the contact part 16, which rests on the insulating part 14, projects beyond the end face 15 by the height 27 indicated by arrows. This height 27 corresponds at least to the actuation path of the signaling switches 12, 13.
  • the system part 16 consists of a bismuth-lead-tin-cadmium alloy, the melting point of which is 70 ° C. If this melting temperature is exceeded, the system part 16 melts and yields to the force exerted by the spring elements 22, the insulating part 14 moving in the direction of this force until it comes to a stop on the end face 15 of the plug contact 9.
  • the actuation path necessary for actuating the signaling switch 12 is covered, and the signaling switch 12 reaches a position which corresponds to that when the plug contact 9 is not inserted. This also enables a temperature-dependent actuation of the signaling switch 12, although the actual end position of the plug contact 9 has not changed.
  • the temperature-dependent change in position of the signaling switch 12 can trigger a signal in the same way as the failure to reach the required end position of the plug contact 9 or act on an external protection which interrupts the circuit to avoid overloading the isolating device.
  • the melting point of which is 70 ° C the melting point of which is 70 ° C, a sufficiently large margin is achieved at the maximum permissible limit temperature, so that the reaction time of the plug contact increases very rapidly external Protection can be kept within the usual tripping times, and yet no damage to the separating device is to be expected.
  • the middle bore 23 for receiving the contact part 16 designed as a bolt ends in a blind hole 24 into which drain holes 25 open, through which the melt of the contact part 16 can flow specifically to the surfaces 26 of the plug contact 9, to which no contact blades are attached.

Landscapes

  • Breakers (AREA)
  • Fuses (AREA)
  • Contacts (AREA)

Claims (6)

1. Dispositif de coupure pour des barres conducteurs à courant fort (1), dans lequel les barres conductrices à courant fort (1) sont disposées au moins partiellement en vis-à-vis et qui comporte un contact à enfichage (9) pouvant être inséré entre les barres conductrices à courant fort (1) et possédant des lamelles de contact (18) sur les surfaces (17) tournées vers les barres conductrices à courant fort (1), et qui comporte un interrupteur de signalisation (12,13) disposé de manière isolée et sur lequel le contact à enfichage (9) vient s'appliquer, dans sa position d'extrémité prévue, et ce sur une surface tournée vers ce contact, et place de ce fait l'interrupteur de signalisation (12,13) dans une position de commutation déterminée, après avoir vaincu la course d'actionnement lors de l'insertion, le contact à enfichage (9) étant isolé par une pièce isolante (14) vis-à-vis de l'interrupteur de signalisation (12,13), caractérisé par le fait que sur la surface (15) du contact à enfichage (9), tournée vers l'interrupteur de signalisation (12,13), est disposé un élément d'application (13) réalisé en un matériau qui fond à basse température et dont le point de fusion est supérieur à la température normale de service, mais est inférieur à la température limite admissible du dispositif de coupure, que l'élément d'application (16) fait saillie, par rapport à cette surface (15) en direction de l'interrupteur de signalisation (12,13), sur une hauteur (27), qui correspond au moins à la course d'actionnement de l'interrupteur de signalisation (12,13), et que l'application du contact à enfichage (9) contre l'interrupteur de signalisation (12,13) s'effectue uniquement au moyen de l'élément d'application (16) et de la pièce isolante (14).
2. Dispositif de coupure suivant la revendication 1, caractérisé par le fait que le dispositif de support de la partie isolante (14) comporte des éléments de ressort (22), qui repoussent la partie isolante (14) contre la surface d'application (28) de la partie d'application (16) formée par le matériau fondant à basse température.
3. Dispositif de coupure suivant la revendication 1 ou 2, caractérisé par le fait que la partie d'application (16) est un goujon qui est inséré dans un perçage (23) ménagé dans la surface frontale (15) du contact à enfichage (9), tournée vers l'interrupteur de signalisation (12).
4. Dispositif de coupure suivant la revendication 3, caractérisé par le fait que le contact à enfichage (9) possède au moins un autre perçage (25), qui raccorde une surface (26) du contact à enfichage (9) sans lamelles de contact (18) au perçage (23) destiné à loger le goujon (16).
5. Dispositif de coupure suivant la revendication 1 ou une ou plusieurs des revendications 2 à 4, caractérisé par le fait que la partie d'application (16) est formée par un métal fondant à basse température et possédant un point de fusion égal à 70°C.
6. Dispositif de coupure suivant la revendication 1 ou l'une des autres revendications, caractérisé par le fait que la partie d'application (16) est formée par un alliage de bismuth-plomb-étain-cadmium qui fond à basse température.
EP88730091A 1987-04-30 1988-04-20 Dispositif de sectionnement pour rails à courant élevé Expired - Lifetime EP0289447B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873714959 DE3714959A1 (de) 1987-04-30 1987-04-30 Trenneinrichtung fuer hochstromschienen
DE3714959 1987-04-30

Publications (2)

Publication Number Publication Date
EP0289447A1 EP0289447A1 (fr) 1988-11-02
EP0289447B1 true EP0289447B1 (fr) 1992-07-15

Family

ID=6326874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730091A Expired - Lifetime EP0289447B1 (fr) 1987-04-30 1988-04-20 Dispositif de sectionnement pour rails à courant élevé

Country Status (2)

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EP (1) EP0289447B1 (fr)
DE (2) DE3714959A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843154C2 (de) * 1988-12-22 1995-07-20 Felten & Guilleaume Energie Auslöseeinrichtung für Schaltgeräte und Schaltanlagen im Mittelspannungsbereich
US6049998A (en) * 1997-11-10 2000-04-18 Beloit Technologies Inc. Apparatus and method for high temperature pressing followed by high intensity drying

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE344591A (fr) * 1927-09-19
BE844373A (fr) * 1976-07-22 1977-01-24 Elphiac Sa Fusible de protection

Also Published As

Publication number Publication date
EP0289447A1 (fr) 1988-11-02
DE3714959A1 (de) 1988-11-10
DE3872755D1 (de) 1992-08-20

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