EP0593498A1 - Isolating switch with a main switch pin and an auxiliary contact pin. - Google Patents

Isolating switch with a main switch pin and an auxiliary contact pin.

Info

Publication number
EP0593498A1
EP0593498A1 EP92910044A EP92910044A EP0593498A1 EP 0593498 A1 EP0593498 A1 EP 0593498A1 EP 92910044 A EP92910044 A EP 92910044A EP 92910044 A EP92910044 A EP 92910044A EP 0593498 A1 EP0593498 A1 EP 0593498A1
Authority
EP
European Patent Office
Prior art keywords
contact
pin
auxiliary
contact pin
auxiliary contact
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.)
Granted
Application number
EP92910044A
Other languages
German (de)
French (fr)
Other versions
EP0593498B1 (en
Inventor
Dieter Lorenz
Detlef Purbst
Dirk Makareinis
Frank Eberl
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 EP0593498A1 publication Critical patent/EP0593498A1/en
Application granted granted Critical
Publication of EP0593498B1 publication Critical patent/EP0593498B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact

Definitions

  • Disconnector with a main switch pin and an auxiliary contact pin
  • the invention relates to a disconnector with an axially drivable main switching pin and a counter contact opposite this with a counter contact piece and an axially movable, spring-loaded auxiliary contact pin that contacts the main switching pin in time before the counter contact piece.
  • Such a circuit breaker is known for example from DE-OS-39 38 711.
  • a main switching pin moves into a mating contact during the switching-on process and makes contact there first with an auxiliary contact pin and then with a mating contact piece in the form of a sliding contact.
  • Such an arrangement is chosen in order to be able to control capacitive currents with a disconnector.
  • the auxiliary contact pin forms a pre-contact to which an arc can be drawn without the
  • the invention is therefore based on the object of designing a disconnector of the type mentioned in such a way that commutation of the current onto the main current path takes place without damage to the rated current contacts even when the high currents occurring when the busbar is changed with low driving voltages.
  • auxiliary sliding contact which is conductively connected to the counter contact piece and contacts the auxiliary contact pin in the switched-off position and at the beginning of the switch-on movement of the main contact pin, from which the auxiliary contact pin runs off after the main contact pin has come into contact with the counter contact piece.
  • the auxiliary sliding contact ensures a reliable conductive connection between the auxiliary contact pin and the mating contact piece that is also capable of withstanding high currents.
  • An advantageous embodiment of the invention provides that the main switching pin and the auxiliary contact pin each consist at least partially of erosion-resistant material on the contacting end faces. 1 This design of the end faces of the contact pins permanently prevents damage to the pre-contact surfaces caused by an electric arc before contact is made.
  • FIG. 1 shows the disconnector according to the invention in a section schematically at the start of the switch-on process
  • FIG. 2 shows the disconnector from FIG. 1 during the switch-on process
  • Figure 3 shows the disconnector in the on state.
  • main switching pin 1 has already moved so far to the counter contact 2 that it touches the Q auxiliary contact pin 3 on the end face.
  • Main switching pin 1 and auxiliary contact pin 3 are each provided with an erosion-resistant insert 4, 5 in order to avoid damage to their end faces by arcs igniting before contact. 5
  • the counter contact 2 is shielded by a field electrode 6. Behind the field electrode 6 is a counter contact piece 7, which carries the rated current.
  • the auxiliary contact pin 3 is axially movable through an insulating rod 8 and loaded in the axial direction by a spring 9.
  • the spring 9 is insulated from the rest of the construction by an insulating washer 10.
  • the auxiliary contact pin 3 is only on 5 contacted the auxiliary sliding contact 11 on its outer surface.
  • the auxiliary contact pin 3 is in engagement with the auxiliary sliding contact 11 at least until the contact between the mating contact piece 7 and the main switching pin 1 is established.
  • the counter contact piece 7 is arranged so that it slides on the outer surface of the main switching pin 1.
  • the auxiliary contact pin 3 has a smaller diameter than the main switching pin 1, so that the auxiliary contact pin 3 does not touch the mating contact piece 7.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Contacts (AREA)
  • Keying Circuit Devices (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

An isolating switch is to be adapted to the heavy currents occurring during busbar changes at low operating voltages. To this end, an auxiliary contact pin (3), which is located in a counter-contact (2) in the known manner and acts as a preliminary contact, is fitted with an auxiliary sliding contact (11). The auxiliary contact pin (3) runs off this auxiliary sliding contact (11) after the counter-contact member has made contact. Thus the rated current is conducted solely along the main current track. (The auxiliary contact pin runs off the auxiliary sliding contact.)

Description

Trennschalter mit einem Hauptschaltstift und einem HilfskontaktstiftDisconnector with a main switch pin and an auxiliary contact pin
Die Erfindung bezieht sich auf einen Trennschalter mit einem in Axialrichtung antreibbaren Hauptschaltstift und einem diesem gegenüberliegenden Gegenkontakt mit einem Gegenkontaktstück und einem axialbeweglichen, federbelasteten, zeitlich vor dem Gegenkontaktstück den Hauptschaltstift kontaktierenden Hilfskontaktstift.The invention relates to a disconnector with an axially drivable main switching pin and a counter contact opposite this with a counter contact piece and an axially movable, spring-loaded auxiliary contact pin that contacts the main switching pin in time before the counter contact piece.
Ein derartiger Trennschalter ist beispielsweise aus der DE-OS-39 38 711 bekannt. Bei dem dort beschriebenen Trennschalter fährt während des Einschaltvorganges ein Hauptschaltstift in einen Gegenkontakt ein und kontaktiert dort zunächst mit einem Hilfskontaktstift und danach mit einem Gegenkontaktstück in Form eines Gleitkontaktes. Eine solche Anordnung wird gewählt, um mit einem Trennschalter kapazitive Ströme beherrschen zu können. Der Hilfs¬ kontaktstift bildet einen Vorkontakt, zu dem ein Lichtbogen gezogen werden kann, ohne daß dabei dieSuch a circuit breaker is known for example from DE-OS-39 38 711. In the disconnector described there, a main switching pin moves into a mating contact during the switching-on process and makes contact there first with an auxiliary contact pin and then with a mating contact piece in the form of a sliding contact. Such an arrangement is chosen in order to be able to control capacitive currents with a disconnector. The auxiliary contact pin forms a pre-contact to which an arc can be drawn without the
Nennstrom führenden Kontaktflächen des Hauptschaltstiftes aufgeschmolzen oder auf andere Weise beschädigt werden. Wenn die durch den Hilfskontaktstift zu übertragenden Ströme gering sind, genügt es, diesen über eine Feder, die ihn axial gegen den Hauptschaltstift drückt, zu kontaktieren,Contact surfaces of the main switching pin that carry the nominal current may be melted or otherwise damaged. If the currents to be transmitted through the auxiliary contact pin are low, it is sufficient to contact the latter via a spring which presses it axially against the main switching pin.
Für den Fall eines Sammelschienenwechsels reicht eine solche Kontaktierung jedoch im allgemeinen nicht aus. Beim Sa melschienenwechsel treten hohe Stromstärken bei relativ geringen Spannungen auf. Es ist daher für eine Kontak¬ tierung des Hilfskontaktstiftes zu sorgen, die auch für höhere Stromstärken geeignet ist. Außerdem besteht in einem solchen Schaltfall die Gefahr, daß bei der Kommutierung des Stromes von dem Nebenstrompfad über den Hilfskontaktstift auf den Hauptstrompfad über das Gegenkontaktstück trotz der geringen auftretenden Spannungen wegen der hohen Leistung Aufschmelzungen am Hauptschaltstift auftreten.In the event of a busbar change, however, such contacting is generally not sufficient. When changing the rail, high currents occur at relatively low voltages. It is therefore necessary to ensure contacting of the auxiliary contact pin, which is also suitable for higher currents. In such a switching case, there is also the risk that when the current is commutated from the bypass path via the Auxiliary contact pin on the main current path via the mating contact piece, despite the low voltages occurring due to the high power, melting on the main switching pin.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Trennschalter der eingangs genannten Art so auszubilden, daß auch bei den beim Sammelschienenwechsel auftretenden hohen Strömen bei geringen treibenden Spannungen eine Kommutierung des Stromes auf den Hauptstrompfad ohne Beschädigung der Nennstromkontakte erfolgt.The invention is therefore based on the object of designing a disconnector of the type mentioned in such a way that commutation of the current onto the main current path takes place without damage to the rated current contacts even when the high currents occurring when the busbar is changed with low driving voltages.
Die Aufgabe wird erfindungsgemäß gelöst durch einen mit dem Gegenkontaktstück leitend verbundenen, den Hilfs- kontaktstift in der Ausschaltstellung und zu Beginn der Einschaltbewegung des Hauptkontaktstiftes kontak¬ tierenden Hilfsgleitkontakt, von dem der Hilfskontaktstift nach Kontaktgabe des Hauptkontaktstiftes mit dem Gegenkontaktstück abläuft.The object is achieved according to the invention by an auxiliary sliding contact which is conductively connected to the counter contact piece and contacts the auxiliary contact pin in the switched-off position and at the beginning of the switch-on movement of the main contact pin, from which the auxiliary contact pin runs off after the main contact pin has come into contact with the counter contact piece.
Der Hilfsgleitkontakt sorgt für eine zuverlässige und auch für hohe Strömstärken tragfähige leitende Verbindung zwischen dem Hilfskontaktstift und dem Gegenkontaktstück. Dadurch, daß der Hilfskontaktstift nach Kontaktgabe des Hauptkontaktstiftes mit dem Gegenkontaktstück vomThe auxiliary sliding contact ensures a reliable conductive connection between the auxiliary contact pin and the mating contact piece that is also capable of withstanding high currents. The fact that the auxiliary contact pin after contacting the main contact pin with the mating contact piece from
Hilfsgleitkontakt abläuft, ist gewährleistet, daß im Einschaltzustand des Trennschalters der Strom nur über einen einzigen, definierten Pfad geleitet wird.Auxiliary slide contact runs, it is ensured that the current is only conducted via a single, defined path when the disconnector is switched on.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der Hauptschaltstift und der Hilfskontaktstift jeweils an den miteinander kontaktierenden Stirnseiten wenigstens teilweise aus abbrandfestem Material bestehen. 1 Durch diese Gestaltung der Stirnseiten der Kontaktstifte wird eine Beschädigung der Vorkontaktflächen durch einen vor Kontaktgabe einsetzenden Lichtbogen dauerhaft vermieden.An advantageous embodiment of the invention provides that the main switching pin and the auxiliary contact pin each consist at least partially of erosion-resistant material on the contacting end faces. 1 This design of the end faces of the contact pins permanently prevents damage to the pre-contact surfaces caused by an electric arc before contact is made.
55
Im folgenden wird die Erfindung anhand eines Ausführungs¬ beispiels in einer Zeichnung gezeigt und anschließend beschrieben.In the following, the invention is shown on the basis of an exemplary embodiment in a drawing and then described.
10 Dabei zeigt 10 shows
Figur 1 den erfindungsgemäßen Trennschalter in einem Schnitt schematisch zu Beginn des Einschalt¬ vorganges, Figur 2 den Trennschalter aus der Figur 1 während des ,- Einschaltvorganges,1 shows the disconnector according to the invention in a section schematically at the start of the switch-on process, FIG. 2 shows the disconnector from FIG. 1 during the switch-on process,
Figur 3 den Trennschalter im Einschaltzustand.Figure 3 shows the disconnector in the on state.
In der Figur 1 ist der Hauptschaltstift 1 bereits so weit an den Gegenkontakt 2 herangefahren, daß er den Q Hilfskontaktstift 3 stirnseitig berührt. Hauptschaltstift 1 und Hilfskontaktstift 3 sind zur Vermeidung von Beschädigungen ihrer Stirnflächen durch vor der Berührung zündende Lichbogen jeweils mit einem abbrandfesten Einsatz 4, 5 versehen. 5In FIG. 1, the main switching pin 1 has already moved so far to the counter contact 2 that it touches the Q auxiliary contact pin 3 on the end face. Main switching pin 1 and auxiliary contact pin 3 are each provided with an erosion-resistant insert 4, 5 in order to avoid damage to their end faces by arcs igniting before contact. 5
Der Gegenkontakt 2 ist durch eine Feldelektrode 6 abgeschirmt. Hinter der Feldelektrode 6 liegt ein Gegenkontaktstück 7, das den Nennstrom trägt.The counter contact 2 is shielded by a field electrode 6. Behind the field electrode 6 is a counter contact piece 7, which carries the rated current.
0 Der Hilfskontaktstift 3 ist axial beweglich durch eine isolierende Stange 8 geführt und durch eine Feder 9 in axialer Richtung belastet. Die Feder 9 ist durch eine Isolierscheibe 10 gegenüber der restlichen Konstruktion isoliert. Der Hilfskontaktstift 3 wird ausschließlich über 5 den Hilfsgleitkontakt 11 an seiner äußeren Mantelfläche kontaktiert. Der Hilfskontaktstift 3 ist mit dem Hilfsgleitkontakt 11 wenigstens solange im Eingriff, bis der Kontakt zwischen dem Gegenkontaktstück 7 und dem Hauptschaltstift 1 hergestellt ist. Das Gegenkontaktstück 7 ist so angeordnet, daß es auf der äußeren Mantelfläche des Hauptschaltstiftes 1 gleitet. Der Hilfskontaktstift 3 weist einen geringeren Durchmesser auf, als der Haupt¬ schaltstift 1, so daß der Hilfskontaktstift 3 das Gegenkontaktstück 7 nicht berührt.0 The auxiliary contact pin 3 is axially movable through an insulating rod 8 and loaded in the axial direction by a spring 9. The spring 9 is insulated from the rest of the construction by an insulating washer 10. The auxiliary contact pin 3 is only on 5 contacted the auxiliary sliding contact 11 on its outer surface. The auxiliary contact pin 3 is in engagement with the auxiliary sliding contact 11 at least until the contact between the mating contact piece 7 and the main switching pin 1 is established. The counter contact piece 7 is arranged so that it slides on the outer surface of the main switching pin 1. The auxiliary contact pin 3 has a smaller diameter than the main switching pin 1, so that the auxiliary contact pin 3 does not touch the mating contact piece 7.
Wird der Hauptschaltstift 1 nach der Kontaktgabe mit dem Gegenkontaktstück 7 weiterbewegt, so schiebt er den Hilfs¬ kontaktstift 3 soweit gegen die Kraft der Feder 9 zurück, bis der Hilfskontaktstift 3 vom Hilfsgleitkontakt 11 abläuft. Danach nimmt der Strom durch den Trennschalter nur noch den einzigen Weg über den Hauptschaltstift 1 und das Gegenkontaktstück 7. If the main switching pin 1 is moved further after making contact with the mating contact piece 7, it pushes the auxiliary contact pin 3 back against the force of the spring 9 until the auxiliary contact pin 3 runs off the auxiliary sliding contact 11. Then the current through the isolating switch only takes the one way via the main switching pin 1 and the mating contact piece 7.

Claims

Patentansprüche Claims
1. Trennschalter mit einem in Axialrichtung antreibbaren Hauptschaltstift und einem diesem gegenüberliegenden Gegenkontakt mit einem Gegenkontaktstück und einem axialbeweglichen, federbelasteten, zeitlich vor dem Gegenkontaktstück den Hauptschaltstift kontaktierenden Hilfskontaktstift, g e k e n n z e i c h n e t d u r c h einen mit dem Gegenkontaktstück (7) leitend verbundenen, den Hilfskontaktstift (3) in der Ausschaltstellung und zu Beginn der Einschaltbewegung des Hauptschaltstiftes (1) kontaktierenden Hilfsgleitkontakt (11), von dem der Hilfskontaktstift (3) nach Kontaktgabe des Hauptschaltstiftes (1) mit dem Gegenkontaktstück (7) abläuft.1.Disconnector with a main switching pin which can be driven in the axial direction and a mating contact opposite this with a mating contact piece and an axially movable, spring-loaded auxiliary contact pin which contacts the main switching pin in time in front of the mating contact piece, characterized by an auxiliary contact pin (3) which is conductively connected to the mating contact piece (7) Switch-off position and auxiliary sliding contact (11) contacting the main switching pin (1) at the beginning of the switching-on movement, from which the auxiliary contact pin (3) runs after the main switching pin (1) has come into contact with the mating contact piece (7).
2. Trennschalter nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der2. Disconnector according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the
Hauptschaltstift (1) und der Hilfskontaktstift (3) jeweils an den miteinander kontaktierenden Stirnseiten wenigstens teilweise aus abbrandfesten. Material bestehen. The main switching pin (1) and the auxiliary contact pin (3) are each made at least partially from erosion-resistant on the contacting end faces. Material.
EP92910044A 1991-07-09 1992-05-12 Isolating switch with a main switch pin and an auxiliary contact pin Expired - Lifetime EP0593498B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9108589U 1991-07-09
DE9108589U DE9108589U1 (en) 1991-07-09 1991-07-09
PCT/DE1992/000393 WO1993001604A1 (en) 1991-07-09 1992-05-12 Isolating switch with a main switch pin and an auxiliary contact pin

Publications (2)

Publication Number Publication Date
EP0593498A1 true EP0593498A1 (en) 1994-04-27
EP0593498B1 EP0593498B1 (en) 1995-08-02

Family

ID=6869210

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910044A Expired - Lifetime EP0593498B1 (en) 1991-07-09 1992-05-12 Isolating switch with a main switch pin and an auxiliary contact pin

Country Status (7)

Country Link
EP (1) EP0593498B1 (en)
JP (1) JPH06508714A (en)
AT (1) ATE125976T1 (en)
CA (1) CA2113097A1 (en)
DE (2) DE9108589U1 (en)
ES (1) ES2075699T3 (en)
WO (1) WO1993001604A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014161737A1 (en) * 2013-04-04 2014-10-09 Siemens Aktiengesellschaft Disconnecting switch unit

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540777A1 (en) * 1995-11-02 1997-05-07 Asea Brown Boveri Electrical switching device
JP3587423B2 (en) * 1997-05-09 2004-11-10 株式会社東芝 Main circuit disconnector
DE102010062343A1 (en) 2010-12-02 2012-06-06 Siemens Aktiengesellschaft Electric contact arrangement
JP5629589B2 (en) * 2011-01-19 2014-11-19 株式会社東芝 Switch
EP3070727B1 (en) * 2015-03-20 2017-09-20 Siemens Aktiengesellschaft Isolating switch device for high-voltage electrical connection and disconnection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938711A1 (en) * 1989-11-17 1991-05-23 Siemens Ag DISCONNECTOR FOR METAL-ENCLOSED, PRESSURE-GAS INSULATED HIGH-VOLTAGE SWITCHGEAR

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9301604A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014161737A1 (en) * 2013-04-04 2014-10-09 Siemens Aktiengesellschaft Disconnecting switch unit

Also Published As

Publication number Publication date
EP0593498B1 (en) 1995-08-02
CA2113097A1 (en) 1993-01-21
ATE125976T1 (en) 1995-08-15
WO1993001604A1 (en) 1993-01-21
ES2075699T3 (en) 1995-10-01
DE59203127D1 (en) 1995-09-07
DE9108589U1 (en) 1991-09-05
JPH06508714A (en) 1994-09-29

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