EP1026710A2 - Switch for use in SF6 gas-insulated medium-voltage switchgear - Google Patents

Switch for use in SF6 gas-insulated medium-voltage switchgear Download PDF

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Publication number
EP1026710A2
EP1026710A2 EP00101480A EP00101480A EP1026710A2 EP 1026710 A2 EP1026710 A2 EP 1026710A2 EP 00101480 A EP00101480 A EP 00101480A EP 00101480 A EP00101480 A EP 00101480A EP 1026710 A2 EP1026710 A2 EP 1026710A2
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EP
European Patent Office
Prior art keywords
contact
switch
arc
switch according
copper
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
EP00101480A
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German (de)
French (fr)
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EP1026710A3 (en
EP1026710B1 (en
Inventor
Albert Dipl.-Ing. Bogner
Rolf Dirks
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Ormazabal Anlagentechnik GmbH
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Felten and Guilleaume AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts

Definitions

  • the invention relates to a switch with a movable switch contact designed as a contact blade for use in SF 6 medium-voltage switchgear, in particular a three-position circuit breaker, the phases of which are assigned to each quenching coil as an arc quenching device.
  • a three-position circuit breaker with the ON-OFF-GROUNDED positions must be connected to its Contact system to be able to safely carry the rated and short-circuit currents switch without the contacts welding or failing mechanically.
  • the switching ability among other things thereby ensuring that the arc generated during switching between the Fixed contact and the movable switching contact of the respective phase kept as short as possible and is quickly extinguished by an arc extinguisher so that the temperature load remains low on the contacts.
  • one Three position circuit breakers require considerable force.
  • Burning of the contacts caused by a high temperature load will result in countered in a known manner that existing contacts made of a burn-resistant material be used.
  • AT 228 318 is an electrical contact for high-voltage switches known, which is created as a sintered part.
  • tungsten powder with a metallic Binding phase mixed from iron-nickel or copper-nickel and in a reducing atmosphere sintered the proportion of tungsten being 85 to 95%.
  • From CH 49 70 34 is a electrical contact is known, which is obtained by impregnating a tungsten skeletal body with a copper-chromium alloy is made. The copper-chromium alloy penetrates the impregnation process into the porous tungsten skeletal body.
  • Tilt tube switch disconnectors are described, each of which has a fixed contact made of a tungsten-copper impregnation alloy with 30% copper.
  • the object of the invention is to provide a switch with a movable contact switch designed as a contact blade for use in SF 6 medium-voltage switchgear according to the preamble of claim 1, which is easier to switch and whose erosion resistance is increased while ensuring the continuous current carrying capacity.
  • the generic switch is made of one with at least one contact knife formed and actuated via a switching shaft switch contact, a fixed contact and an arc extinguisher.
  • the invention now consists in that a pivoted shaft and one substantially in a plane perpendicular to Swivel axis formed contact surface for the contact knife having fixed contact so is formed that the contact surface on a considerably thicker than the shaft Contact head is formed and this for an arc forming when switching partly made of a fire-resistant, high-temperature-resistant tungsten-copper alloy consists.
  • This design of the contact knife enables the mass of the switch contact to be increased considerably to reduce and thus reduce the drive energy for its switching movement.
  • the continuous current carrying capacity is thereby ensured that the contact surface for the fixed contact the copper part of the contact head is formed.
  • the one made of tungsten-copper alloy Existing part of the contact head increases the heat resistance of the switch contact in the area affected by an arc and prevents in this a burn on the switch contact.
  • the fixed contact in the form of a contact during switching Arcing area to form from a tungsten-copper alloy, too to increase its heat resistance and thus prevent the contacts weld together.
  • a known impregnation alloy can be used as the tungsten-copper alloy with 30% copper are used, the parts of this alloy consisting of Contact head and the fixed contact made separately and soldered to the rest of the head part become.
  • the contact head is crowned on the fixed contact side so that the current transfer between the copper area of the contact head and the copper contact surface of the fixed contact can, and the switching knife can in the longitudinal direction at least in the region of the contact head slotted in the middle to divide the current to be conducted.
  • the arc has a switch contact-side and a fixed contact-side base point it is expedient to have a surface at the respective contact receiving the respective base point to be defined essentially at right angles to the arc.
  • shock absorbers in the defined end positions.
  • Fig. 1 is a three-position circuit breaker with one of two arranged in parallel Contact blades 1 (also Fig. 4) made of copper actuable switch contact, a fixed contact 2 and a quenching coil 3 shown.
  • the contact blades 1 forming the switching contact are arranged pivotable about a pivot axis S and via a connecting rod 4 and a with a switching shaft 5 rotatably connected crank arm 6 can be actuated together.
  • You point each have a shaft 7 and a contact surface 8 corresponding to the fixed contact 2 on, like two opposite contact surfaces 9 of the fixed contact 2, in one Level is formed perpendicular to the pivot axis S.
  • Fig. 4 shows that this on one opposite the shaft 7 is formed considerably thicker contact head 10.
  • the contact head thickness is about one and a half to two times the thickness of the shaft.
  • the contact head 10 is made made of copper and has a tip 11 made of a high temperature resistant tungsten-copper impregnating alloy with 30% copper, which is caused by an arc that forms when switching is subjected to high thermal stress.
  • the contact head 10 On the fixed contact side, the contact head 10 is spherical and is pressed by a spring force F against the fixed contact 2.
  • This consists of Copper and has in the area corresponding to the tip 11 of the contact head 10 also a tip 12 made of the high temperature-resistant tungsten-copper impregnating alloy on. The tip 11 abuts a shock absorber 13.
  • the switch is in a movement phase between the switch positions ON and OFF shown.
  • a Arc LB is formed, its two base points each on a substantially perpendicular to the arc formed surface 14 and 15 at the respective tip 11 and 12 respectively.
  • Fig. 3 shows that in the switch position EARTHED on a ground contact 16 and one Shock absorber 17 adjacent switch contact 1.
  • the tip 11 of the visible switch blade 1 corresponds to a region 18 formed on the ground contact.
  • 6a and 6b is a contact knife 1 in a side view and in a plan view shown. In the latter there is a longitudinally formed one in the center of the contact head 10 To see gap 19, which serves to divide the current.
  • 7a and 7b show more alternative designs of a contact knife 1, which is characterized by the formation of the tungsten-copper tip differentiate.
  • Fig. 7a is compared to the previously described embodiment on the front edge of the contact head 10 reduced tip 20 and in Fig. 7b a half-sided Tip 21 can be seen.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Contacts (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Lubricants (AREA)

Abstract

The switch has a contact blade (1), a fixed contact and an arc-quenching device. The contact blade has a contact surface (8) is formed by a contact head (10) which is considerably thicker than a shaft (7). The contact head includes a tip (11) made of a material that is resistant to high temperatures as it is subjected to heat due to arcing when switching.

Description

Die Erfindung betrifft einen Schalter mit als Kontaktmesser ausgebildeten beweglichen Schaltkontakten für den Einsatz in SF6-Mittelspannungsschaltanlagen, insbesondere einen Drei-Stellungs-Leistungsschalter, dessen Phasen jeweils eine Löschspule als Lichtbogenlöscheinrichtung zugeordnet ist.The invention relates to a switch with a movable switch contact designed as a contact blade for use in SF 6 medium-voltage switchgear, in particular a three-position circuit breaker, the phases of which are assigned to each quenching coil as an arc quenching device.

Ein Drei-Stellungs-Leistungsschalter mit den Stellungen EIN-AUS-GEERDET muß mit seinem Kontaktsystem in den Lage sein, die Nenn- und Kurzschlußströme sicher zu tragen und zu schalten, ohne daß die Kontakte verschweißen oder mechanisch versagen. Die Schaltfähigkeit wird u.a. dadurch sichergestellt, daß der beim Schalten entstehende Lichtbogen zwischen dem Festkontakt und dem beweglichen Schaltkontakt der jeweiligen Phase möglichst kurz gehalten und durch eine Lichtbogenlöscheinrichtung rasch gelöscht wird, so daß die Temperaturbelastung an den Kontakten niedrig bleibt. Für das Schalten der beweglichen Schaltkontakte eines Drei-Stellungs-Leistungsschalters sind erhebliche Kräfte erforderlich.A three-position circuit breaker with the ON-OFF-GROUNDED positions must be connected to its Contact system to be able to safely carry the rated and short-circuit currents switch without the contacts welding or failing mechanically. The switching ability among other things thereby ensuring that the arc generated during switching between the Fixed contact and the movable switching contact of the respective phase kept as short as possible and is quickly extinguished by an arc extinguisher so that the temperature load remains low on the contacts. For switching the movable switch contacts one Three position circuit breakers require considerable force.

Einem durch eine hohe Temperaturbelastung verursachten Abbrand an den Kontakten wird in bekannter Weise dadurch begegnet, daß aus einem abbrandfesten Material bestehende Kontakte eingesetzt werden. So ist aus der AT 228 318 ein elektrischer Kontakt für Hochspannungsachalter bekannt, der als Sinterteil erstellt wird. Dazu wird Wolframpulver mit einer metallischen Bindephase aus Eisen-Nickel oder Kupfer-Nickel gemischt und in reduzierender Atmosphäre gesintert, wobei der Wolfram-Anteil 85 bis 95 % beträgt. Aus der CH 49 70 34 ist ein elektrischer Kontakt bekannt, der durch Tränken eines Wolfram-Skelettkörpers mit einer Kupfer-Chrom-Legierung hergestellt ist. Bei dem Tränkprozeß dringt die Kupfer-Chrom-Legierung in den porösen Wolfram-Skelettkörper ein. In der DE 4040902 C2 und der DE-PS 2353627 sind Kipprohrlasttrennschalter beschrieben, bei denen jeweils der Festkontakt aus einer Wolfram-Kupfer-Tränklegierung mit 30 % Kupfer besteht.Burning of the contacts caused by a high temperature load will result in countered in a known manner that existing contacts made of a burn-resistant material be used. AT 228 318 is an electrical contact for high-voltage switches known, which is created as a sintered part. For this purpose, tungsten powder with a metallic Binding phase mixed from iron-nickel or copper-nickel and in a reducing atmosphere sintered, the proportion of tungsten being 85 to 95%. From CH 49 70 34 is a electrical contact is known, which is obtained by impregnating a tungsten skeletal body with a copper-chromium alloy is made. The copper-chromium alloy penetrates the impregnation process into the porous tungsten skeletal body. In DE 4040902 C2 and DE-PS 2353627 Tilt tube switch disconnectors are described, each of which has a fixed contact made of a tungsten-copper impregnation alloy with 30% copper.

Aufgabe der Erfindung ist es, einen Schalter mit als Kontaktmesser ausgebildeten beweglichen Schaltkontakten für den Einsatz in SF6-Mittelspannungsschaltanlagen nach dem Oberbegriff des Anspruchs 1 zu schaffen, der erleichtert schaltbar und dessen Abbrandfestigkeit bei Sicherstellung der Dauerstromtragfähigkeit erhöht ist. The object of the invention is to provide a switch with a movable contact switch designed as a contact blade for use in SF 6 medium-voltage switchgear according to the preamble of claim 1, which is easier to switch and whose erosion resistance is increased while ensuring the continuous current carrying capacity.

Diese Aufgabe wird bei einem Schalter nach dem Oberbegriff des Anspruchs 1 durch dessen kennzeichnende Merkmale gelöst. Weiterführende Ausgestaltungen finden sich in den Unteransprüchen.This object is achieved by a switch according to the preamble of claim 1 characteristic features solved. Further developments can be found in the subclaims.

In bekannter Weise ist der gattungsgemäße Schalter aus einem mit wenigstens einem Kontaktmesser gebildeten und über eine Schaltwelle betätigbaren Schaltkontakt, einem Festkontakt und einer Lichtbogenlöscheinrichtung gebildet. Die Erfindung besteht nun darin, daß das einen schwenkbar gelagerten Schaft und eine im wesentlichen in einer Ebene senkrecht zur Schwenkachse ausgebildete Kontaktfläche für den Festkontakt aufweisende Kontaktmesser so ausgebildet ist, daß die Kontaktfläche an einem gegenüber dem Schaft erheblich dickeren Kontaktkopf ausgebildet ist und dieser für einen sich beim Schalten ausbildenden Lichtbogen teilweise aus einer abbrandfesten, hochtemperaturbeständigen Wolfram-Kupfer-Legierung besteht.In a known manner, the generic switch is made of one with at least one contact knife formed and actuated via a switching shaft switch contact, a fixed contact and an arc extinguisher. The invention now consists in that a pivoted shaft and one substantially in a plane perpendicular to Swivel axis formed contact surface for the contact knife having fixed contact so is formed that the contact surface on a considerably thicker than the shaft Contact head is formed and this for an arc forming when switching partly made of a fire-resistant, high-temperature-resistant tungsten-copper alloy consists.

Diese Ausbildung des Kontaktmessers ermöglicht es, die Masse des Schaltkontaktes erheblich zu reduzieren und so die Antriebsenergie für dessen Schaltbewegung zu verringern. Die Dauerstromtragfähigkeit wird dadurch sichergestellt, daß die Kontaktfläche für den Festkontakt an dem aus Kupfer bestehenden Teil des Kontaktkopfes ausgebildet ist. Der aus der Wolfram-Kupfer-Legierung bestehende Teil des Kontaktkopfes erhöht die Hitzebeständigkeit des Schaltkontaktes in dem durch einen Lichtbogen beaufschlagten Bereich und verhindert in diesem einen Abbrand am Schaltkontakt.This design of the contact knife enables the mass of the switch contact to be increased considerably to reduce and thus reduce the drive energy for its switching movement. The continuous current carrying capacity is thereby ensured that the contact surface for the fixed contact the copper part of the contact head is formed. The one made of tungsten-copper alloy Existing part of the contact head increases the heat resistance of the switch contact in the area affected by an arc and prevents in this a burn on the switch contact.

Es ist zweckmäßig, auch den Festkontakt in dem durch einen sich beim Schalten ausbildenden Lichtbogen beaufschlagten Bereich aus einer Wolfram-Kupfer-Legierung zu bilden, um auch dessen Hitzebeständigkeit zu erhöhen und auf diese Weise zu verhindern, daß die Kontakte miteinander verschweißen. Als Wolfram-Kupfer-Legierung kann eine bekannte Tränklegierung mit 30 % Kupfer eingesetzt werden, wobei die aus dieser Legierung bestehenden Teile des Kontaktkopfes und des Festkontaktes separat hergestellt und an das übrige Kopfteil angelötet werden.It is expedient to also have the fixed contact in the form of a contact during switching Arcing area to form from a tungsten-copper alloy, too to increase its heat resistance and thus prevent the contacts weld together. A known impregnation alloy can be used as the tungsten-copper alloy with 30% copper are used, the parts of this alloy consisting of Contact head and the fixed contact made separately and soldered to the rest of the head part become.

Der Kontaktkopf ist festkontaktseitig ballig ausgebildet, damit der Stromübergang zwischen dem Kupferbereich des Kontaktkopfes und der Kupfer-Kontaktfläche des Festkontaktes erfolgen kann, und das Schaltmesser kann in Längsrichtung wenigstens im Bereich des Kontaktkopfes mittig geschlitzt sein, um den zu führenden Strom zu teilen. The contact head is crowned on the fixed contact side so that the current transfer between the copper area of the contact head and the copper contact surface of the fixed contact can, and the switching knife can in the longitudinal direction at least in the region of the contact head slotted in the middle to divide the current to be conducted.

Da der Lichtbogen einen schaltkontaktseitigen und einen festkontaktseitigen Fußpunkt hat, ist es zweckmäßig, eine am jeweiligen Kontakt den jeweiligen Fußpunkt aufnehmende Fläche im wesentlichen rechtwinklig zum Lichtbogen definiert auszubilden.Since the arc has a switch contact-side and a fixed contact-side base point it is expedient to have a surface at the respective contact receiving the respective base point to be defined essentially at right angles to the arc.

Um das Anschlagen des Schaltkontaktes bei einer Schaltkontaktbewegung in die jeweilige Endstellung zu dämpfen, ist es vorteilhaft, in den definierten Endstellungen Stoßdämpfer anzuordnen.The striking of the switching contact during a switching contact movement in the respective To damp end position, it is advantageous to arrange shock absorbers in the defined end positions.

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen erläutert. In den zugehörigen Zeichnungen wird schematisch dargestellt:

Fig. 1:
eine Phase eines Drei-Stellungs-Leistungsschalters mit einer Löschspule in der Schalterstellung EIN,
Fig. 2:
eine Bewegungsphase des beweglichen Schaltkontaktes zwischen den Schalterstellungen EIN und AUS,
Fig. 3:
die Phase in der Schalterstellung GEERDET,
Fig. 4:
eine Sicht aus der AUS-Position auf den in der Schalterstellung EIN befindlichen Schaltkontakt,
Fig. 5a bis c:
die Spitze des Schaltkontaktes in unterschiedlichen Positionen zum Festkontakt,
Fig. 6a und b:
ein Kontaktmesser in zwei Ansichten und
Fig. 7a und b:
weitere Ausführungen eines Kontaktmessers.
The invention is explained below using exemplary embodiments. The accompanying drawings show schematically:
Fig. 1:
a phase of a three-position circuit breaker with an arcing coil in the ON switch position,
Fig. 2:
a phase of movement of the movable switch contact between the switch positions ON and OFF,
Fig. 3:
the phase in the switch position is GROUNDED,
Fig. 4:
a view from the OFF position of the switch contact in the switch position ON,
5a to c:
the tip of the switch contact in different positions to the fixed contact,
6a and b:
a contact knife in two views and
7a and b:
further versions of a contact knife.

In Fig. 1 ist ein Drei-Stellungs-Leistungsschalter mit einem aus zwei parallel angeordneten Kontaktmessern 1 (auch Fig. 4) aus Kupfer gebildeten betätigbaren Schaltkontakt, einem Festkontakt 2 und einer Löschspule 3 dargestellt. Die den Schaltkontakt bildenden Kontaktmesser 1 sind um eine Schwenkachse S schwenkbar angeordnet und über eine Pleuelstange 4 und eine mit einer Schaltwelle 5 drehfest verbundene Kurbelschwinge 6 gemeinsam betätigbar. Sie weisen jeweils einen Schaft 7 und eine mit dem Festkontakt 2 korrespondierende Kontaktfläche 8 auf, die, wie zwei einander gegenüberliegende Kontaktflächen 9 des Festkontaktes 2, in einer Ebene senkrecht zur Schwenkachse S ausgebildet ist. Fig. 4 zeigt, daß diese an einem gegenüber dem Schaft 7 erheblich dickeren Kontaktkopf 10 ausgebildet ist. Die Kontaktkopf-Dicke beträgt etwa das anderthalb- bis zweifache der Dicke des Schafts. Der Kontaktkopf 10 besteht aus Kupfer und weist eine Spitze 11 aus einer hochtemperaturbeständigen Wolfram-Kupfer-Tränklegierung mit 30 % Kupfer auf, die durch einen sich beim Schalten ausbildenden Lichtbogen thermisch hoch beansprucht wird. Festkontaktseitig ist der Kontaktkopf 10 ballig ausgebildet und wird durch eine Federkraft F gegen den Festkontakt 2 gedrückt. Dieser besteht aus Kupfer und weist in dem mit der Spitze 11 des Kontaktkopfes 10 korrespondierenden Bereich ebenfalls eine Spitze 12 aus der genannten hochtemperaturbeständigen Wolfram-Kupfer-Tränklegierung auf. Die Spitze 11 liegt an einem Stoßdämpfer 13 an.In Fig. 1 is a three-position circuit breaker with one of two arranged in parallel Contact blades 1 (also Fig. 4) made of copper actuable switch contact, a fixed contact 2 and a quenching coil 3 shown. The contact blades 1 forming the switching contact are arranged pivotable about a pivot axis S and via a connecting rod 4 and a with a switching shaft 5 rotatably connected crank arm 6 can be actuated together. You point each have a shaft 7 and a contact surface 8 corresponding to the fixed contact 2 on, like two opposite contact surfaces 9 of the fixed contact 2, in one Level is formed perpendicular to the pivot axis S. Fig. 4 shows that this on one opposite the shaft 7 is formed considerably thicker contact head 10. The contact head thickness is about one and a half to two times the thickness of the shaft. The contact head 10 is made made of copper and has a tip 11 made of a high temperature resistant tungsten-copper impregnating alloy with 30% copper, which is caused by an arc that forms when switching is subjected to high thermal stress. On the fixed contact side, the contact head 10 is spherical and is pressed by a spring force F against the fixed contact 2. This consists of Copper and has in the area corresponding to the tip 11 of the contact head 10 also a tip 12 made of the high temperature-resistant tungsten-copper impregnating alloy on. The tip 11 abuts a shock absorber 13.

In der Fig. 2 ist der Schalter in einer Bewegungsphase zwischen den Schalterstellungen EIN und AUS gezeigt. Zwischen den Spitzen 11 und 12 der beiden Schalterkontakte 1 und 2 ist ein Lichtbogen LB ausgebildet, der seine beiden Fußpunkte jeweils auf einer im wesentlichen senkrecht zum Lichtbogen ausgebildeten Fläche 14 und 15 an der jeweiligen Spitze 11 bzw. 12 hat.2, the switch is in a movement phase between the switch positions ON and OFF shown. Between the tips 11 and 12 of the two switch contacts 1 and 2 is a Arc LB is formed, its two base points each on a substantially perpendicular to the arc formed surface 14 and 15 at the respective tip 11 and 12 respectively.

Fig. 3 zeigt den in der Schalterstellung GEERDET an einem Erdungskontakt 16 und einem Stoßdämpfer 17 anliegenden Schaltkontakt 1. Die Spitze 11 des sichtbaren Schaltmessers 1 korrespondiert mit einem am Erdungskontakt ausgebildeten Bereich 18.Fig. 3 shows that in the switch position EARTHED on a ground contact 16 and one Shock absorber 17 adjacent switch contact 1. The tip 11 of the visible switch blade 1 corresponds to a region 18 formed on the ground contact.

In den Fig. 6a und 6b ist ein Kontaktmesser 1 in einer Seitenansicht und in einer Draufsicht dargestellt. In letzterer ist ein im Bereich des Kontaktkopfes 10 in Längsrichtung mittig ausgebildeter Spalt 19 zu sehen, der einer Stromteilung dient. Die Fig. 7a und 7b zeigen weitere alternative Ausführungen eines Kontaktmessers 1, die sich durch die Ausbildung der Wolfram-Kupfer-Spitze unterscheiden. In Fig. 7a ist gegenüber der vorbeschriebenen Ausführung eine auf die Stirnkante des Kontaktkopf es 10 reduzierte Spitze 20 und in Fig. 7b eine halbseitige Spitze 21 zu sehen.6a and 6b is a contact knife 1 in a side view and in a plan view shown. In the latter there is a longitudinally formed one in the center of the contact head 10 To see gap 19, which serves to divide the current. 7a and 7b show more alternative designs of a contact knife 1, which is characterized by the formation of the tungsten-copper tip differentiate. In Fig. 7a is compared to the previously described embodiment on the front edge of the contact head 10 reduced tip 20 and in Fig. 7b a half-sided Tip 21 can be seen.

Wird nun der Schaltkontakt aus der EIN-Schaltstellung (Fig. 1, Fig. 5a) in Richtung der AUS-Schaltstellung bewegt, durchläuft dieser die Bewegungsphase nach Fig. 5b, in der die Spitzen 11 und 12 voneinander getrennt und die Spitzen 11 durch die anliegende Federkraft F jeweils um den Betrag f aufeinander zu bewegt werden. Dabei entsteht ein Lichtbogen LB zwischen der Spitze 12 und den Spitzen 11, der an seinen Fußpunkten jeweils senkrecht zu den an den Spitzen ausgebildeten Flächen verläuft (Fig. 2, Fig. 5c). Ein Abbrand an den Kontakten 1 und 2 wird durch die aus der hochtemperaturbeständigen Wolfram-Kupfer-Tränklegierung mit 30% Kupfer bestehenden Spitzen 11 (20, 21) und 12 vermieden. Now the switch contact from the ON switch position (Fig. 1, Fig. 5a) in the direction of the OFF switch position moves, this goes through the movement phase according to Fig. 5b, in which the tips 11 and 12 separated from each other and the tips 11 by the applied spring force F. be moved towards each other by the amount f. This creates an arc LB between the tip 12 and the tips 11, which are at their base points perpendicular to those at the Pointed surfaces run (Fig. 2, Fig. 5c). Burning of contacts 1 and 2 is made from the high temperature resistant tungsten copper impregnating alloy with 30% Copper existing tips 11 (20, 21) and 12 avoided.

Liste der verwendeten BezugszeichenList of the reference symbols used

11
KontaktmesserContact knife
22nd
FestkontaktFixed contact
33rd
LöschspuleQuenching coil
44th
Pleuelstangeconnecting rod
55
SchaltwelleSelector shaft
66
KurbelschwingeCrank arm
77
Schaftshaft
88th
KontaktflächeContact area
99
KontaktflächeContact area
1010th
KontaktkoptContact head
1111
Spitzetop
1212th
Spitzetop
1313
StoßdämpferShock absorber
1414
Flächearea
1515
Flächearea
1616
ErdungskontaktEarth contact
1717th
StoßdämpferShock absorber
1818th
BereichArea
1919th
Spaltgap
2020th
Spitzetop
2121
Spitzetop
LBLB
LichtbogenElectric arc
SS
SchwenkachseSwivel axis

Claims (7)

Schalter für den Einsatz in SF6-Mittelspannungsschaltanlagen, gebildet aus einem betätigbaren Schaltkontakt mit wenigstens einem Kontaktmesser (1), einem Festkontakt und einer Lichtbogenlöscheinrichtung, wobei das Kontaktmesser (1) einen schwenkbar gelagerten Schaft (7) und eine in einer Ebene im wesentlichen senkrecht zur Schwenkachse (S) ausgebildete Kontaktfläche (8) für den Festkontakt aufweist, dadurch gekennzeichnet, daß die Kontaktfläche (8) an einem gegenüber dem Schaft (7) erheblich dickeren Kontaktkopf (10) ausgebildet ist, und daß der Kontaktkopf (10) in dem durch einen sich beim Schalten ausbildenden Lichtbogen (LB) thermisch beaufschlagten Teil (Spitzen 11, 20, 21) aus einem hochtemperaturbeständigen Werkstoff besteht.Switches for use in SF 6 medium-voltage switchgear, formed from an actuatable switch contact with at least one contact blade (1), a fixed contact and an arc extinguishing device, the contact blade (1) having a pivotably mounted shaft (7) and one in one plane essentially perpendicular to the pivot axis (S) formed contact surface (8) for the fixed contact, characterized in that the contact surface (8) is formed on a considerably thicker than the shaft (7) contact head (10), and that the contact head (10) in the consists of a high temperature-resistant material due to an arc (LB) which is thermally acted upon during switching (tips 11, 20, 21). Schalter nach Anspruch 1, dadurch gekennzeichnet, daß der Festkontakt (2) in dem durch den Lichtbogen (LB) thermisch beaufschlagten Teil (Spitze 12) aus einem hochtemperaturbeständigen Werkstoff besteht.Switch according to claim 1, characterized in that the fixed contact (2) in the part (tip 12) thermally acted upon by the arc (LB) consists of a high-temperature resistant material. Schalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der hochtemperaturbeständige Werkstoff eine Wolfram-Kupfer-Tränklegierung mit 30 % Kupfer ist.Switch according to claim 1 or 2, characterized in that the high temperature resistant material is a tungsten-copper impregnation alloy with 30% copper. Schalter nach Anspruch 1, dadurch gekennzeichnet daß der Kontaktkopf (10) festkontaktseitig ballig ausgebildet ist.Switch according to claim 1, characterized in that the contact head (10) is convex on the fixed contact side. Schalter nach Anspruch 1, dadurch gekennzeichnet, daß das Kontaktmesser (1) in Längsrichtung wenigstens im Bereich des Kontaktkopfes (10) mittig geschlitzt ist (Spalt 19).Switch according to Claim 1, characterized in that the contact blade (1) is slotted in the center in the longitudinal direction at least in the region of the contact head (10) (gap 19). Schalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der aus dem hochtemperaturbeständigen Werkstoff bestehende Teil (Spitze 11, 12, 20, 21) so gestaltet ist, daß dieser eine im wesentlichen senkrecht zum Lichtbogen (LB) ausgebildete Fläche (14, 15) für den jeweiligen Fußpunkt des Lichtbogens (LB) aufweist.Switch according to Claim 1 or 2, characterized in that the part (tip 11, 12, 20, 21) made of the high-temperature resistant material is designed such that it has a surface (14, 15) which is essentially perpendicular to the arc (LB). for the respective base point of the arc (LB). Schalter nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in den definierten Endstellungen (EIN, GEERDET) des Schaltkontaktes Stoßdämpfer (13, 17) für den Kontaktkopf (10) angeordnet sind.Switch according to one or more of the preceding claims , characterized in that shock absorbers (13, 17) for the contact head (10) are arranged in the defined end positions (ON, EARTHED) of the switching contact.
EP00101480A 1999-02-06 2000-01-26 Switch for use in SF6 gas-insulated medium-voltage switchgear Expired - Lifetime EP1026710B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904930A DE19904930C2 (en) 1999-02-06 1999-02-06 Switches for use in SF6 medium-voltage switchgear
DE19904930 1999-02-06

Publications (3)

Publication Number Publication Date
EP1026710A2 true EP1026710A2 (en) 2000-08-09
EP1026710A3 EP1026710A3 (en) 2001-11-14
EP1026710B1 EP1026710B1 (en) 2006-04-12

Family

ID=7896691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00101480A Expired - Lifetime EP1026710B1 (en) 1999-02-06 2000-01-26 Switch for use in SF6 gas-insulated medium-voltage switchgear

Country Status (6)

Country Link
EP (1) EP1026710B1 (en)
AT (1) ATE323319T1 (en)
DE (2) DE19904930C2 (en)
ES (1) ES2261110T3 (en)
NO (1) NO319046B1 (en)
PT (1) PT1026710E (en)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN101882508A (en) * 2009-05-04 2010-11-10 Abb技术股份公司 Medium voltage line switch contact arrangement and medium voltage line switch including the same
EP2565890A1 (en) 2011-09-01 2013-03-06 Socomec S.A. Electrical switchgear with high making capacity
US8723627B2 (en) 2011-09-01 2014-05-13 Socomec, S.A. Electrical cut-off device with high electrodynamic resistance
EP2822013A1 (en) * 2013-07-05 2015-01-07 ABB Technology AG High voltage circuit breaker with high voltage switching unit
US8993908B2 (en) 2011-09-01 2015-03-31 Socomec S.A. Moving contact-carrying carriage and electrical cut-off device equipped with such carriage
WO2019058631A1 (en) * 2017-09-21 2019-03-28 三菱電機株式会社 Switch
JP6548858B1 (en) * 2018-05-10 2019-07-24 三菱電機株式会社 Switch

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US3691335A (en) * 1971-03-01 1972-09-12 Westinghouse Electric Corp Knife blade contact assembly with improved contact engagement position retaining means
EP0420609A2 (en) * 1989-09-29 1991-04-03 Cooper Power Systems, Inc. On/off loadbreak switch
US5013876A (en) * 1988-09-12 1991-05-07 S&C Electric Company Switch contacts with improved fault-closing capability

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FR2048151A5 (en) * 1969-06-02 1971-03-19 Merlin Gerin
US3691335A (en) * 1971-03-01 1972-09-12 Westinghouse Electric Corp Knife blade contact assembly with improved contact engagement position retaining means
US5013876A (en) * 1988-09-12 1991-05-07 S&C Electric Company Switch contacts with improved fault-closing capability
EP0420609A2 (en) * 1989-09-29 1991-04-03 Cooper Power Systems, Inc. On/off loadbreak switch

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101882508A (en) * 2009-05-04 2010-11-10 Abb技术股份公司 Medium voltage line switch contact arrangement and medium voltage line switch including the same
EP2249359A1 (en) * 2009-05-04 2010-11-10 ABB Technology AG Medium voltage line switch contact arrangement.
EP2565890A1 (en) 2011-09-01 2013-03-06 Socomec S.A. Electrical switchgear with high making capacity
US8723627B2 (en) 2011-09-01 2014-05-13 Socomec, S.A. Electrical cut-off device with high electrodynamic resistance
US8859916B2 (en) 2011-09-01 2014-10-14 Socomec S.A. Electrical cut-off device with high making capacity
US8993908B2 (en) 2011-09-01 2015-03-31 Socomec S.A. Moving contact-carrying carriage and electrical cut-off device equipped with such carriage
EP2822013A1 (en) * 2013-07-05 2015-01-07 ABB Technology AG High voltage circuit breaker with high voltage switching unit
WO2019058631A1 (en) * 2017-09-21 2019-03-28 三菱電機株式会社 Switch
JP6548858B1 (en) * 2018-05-10 2019-07-24 三菱電機株式会社 Switch
WO2019215946A1 (en) * 2018-05-10 2019-11-14 三菱電機株式会社 Switch
US11158466B2 (en) 2018-05-10 2021-10-26 Mitsubishi Electric Corporation Switch

Also Published As

Publication number Publication date
DE19904930A1 (en) 2000-08-31
PT1026710E (en) 2006-07-31
DE19904930C2 (en) 2000-12-14
EP1026710A3 (en) 2001-11-14
NO20000566L (en) 2000-08-07
ES2261110T3 (en) 2006-11-16
EP1026710B1 (en) 2006-04-12
NO20000566D0 (en) 2000-02-04
DE50012546D1 (en) 2006-05-24
NO319046B1 (en) 2005-06-06
ATE323319T1 (en) 2006-04-15

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