EP0398116B1 - Mittelspannungsschalter mit Selbstbeblasung - Google Patents

Mittelspannungsschalter mit Selbstbeblasung Download PDF

Info

Publication number
EP0398116B1
EP0398116B1 EP90108556A EP90108556A EP0398116B1 EP 0398116 B1 EP0398116 B1 EP 0398116B1 EP 90108556 A EP90108556 A EP 90108556A EP 90108556 A EP90108556 A EP 90108556A EP 0398116 B1 EP0398116 B1 EP 0398116B1
Authority
EP
European Patent Office
Prior art keywords
volume
contact
circuit breaker
arc contact
arc
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
EP90108556A
Other languages
English (en)
French (fr)
Other versions
EP0398116A1 (de
Inventor
Edmond Thuries
Denis Dufournet
Michel Perret
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Priority to AT90108556T priority Critical patent/ATE103415T1/de
Publication of EP0398116A1 publication Critical patent/EP0398116A1/de
Application granted granted Critical
Publication of EP0398116B1 publication Critical patent/EP0398116B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow

Definitions

  • the present invention relates to a medium-voltage circuit breaker in which the insulation is ensured by a gas with good dielectric properties, such as sulfur hexafluoride (SF6), this same gas ensuring by self-blowing the extinction of the arc that forms when the circuit breaker opens.
  • a gas with good dielectric properties such as sulfur hexafluoride (SF6)
  • Such a circuit breaker is known, for example from the article in the Brown Boveri Review 3-87 pages 150 to 156.
  • thermal volume in which the gas, heated by the arc, undergoes an increase in pressure; a first zero crossing of the alternating current to be cut, the arc decreases in intensity and the gas expands by blowing the arc.
  • EP-A-150 079 describes a circuit breaker in accordance with the preamble of claim 1.
  • An object of the present invention is to provide a circuit breaker having a safe and secure operation for all the values of the current to be cut.
  • circuit breaker with a variable thermal volume depending on whether the current to be cut has a low or high intensity.
  • the subject of the invention is a circuit breaker as defined in claim 1.
  • FIG. 1 there is a cylindrical insulating envelope 1 of axis xx, closed at one end by a metal shell 2. The second end of the envelope has not been shown.
  • the envelope is made in a sealed manner and is filled with a gas with good dielectric properties, such as sulfur hexafluoride (SF6), under a pressure of a few bars.
  • a first electrical outlet 3 crosses the envelope and is connected to a cylindrical part 4, of axis xx, constituting the fixed main contact of the circuit breaker.
  • a second socket 5 of the circuit breaker crosses the casing in a sealed manner, and is in electrical contact, by means of sliding contacts 6, with a metal rod 7, of axis xx, constituting the movable arcing contact of the circuit breaker.
  • the rod 7 is provided, at a first end, with a wearing part 7A made of a material resistant well to the destructive effects of the electric arc, for example an alloy based on tungsten.
  • the other end of the rod 7 is articulated to an operating rod 8 made of an insulating material.
  • To the rod 7 is fixed a ring of contact fingers 9, constituting the movable main contact of the circuit breaker, and cooperating, when the circuit breaker is closed (case of FIG. 1), with the tubular part 4 for the passage of the permanent current.
  • the fingers 9 are fixed to the rod 7 by a crown 10, coming from machining with the rod, and provided with orifices 11 so as not to hinder the movements of the gas during the maneuvers of the latter, as will be explained below. .
  • the socket 5 which, inside the envelope, takes the form of a crown, is provided with orifices 12.
  • V1 will denote the volume delimited, inside the envelope 1, by the sockets 3 and 5 and the tube7.
  • a ring of fingers 14, each terminated by a wear pad 14A, is fixed to the top 15 of the shell, and constitutes the movable arcing contact of the circuit breaker.
  • the contacts 14, the top 15 and the rod 7 define a volume V2; this volume is closed by a tubular valve 16 of axis xx, cooperating with an insulating tubular part 17, integral with the contact fingers 14 and sliding in leaktight manner, thanks to a sealing segment 17A, on the rod 7.
  • the valve tubular 16 can move parallel to the axis xx, and is recalled by a spring 18 which rests on a jacket 20 of insulating material which matches the shape of the shell 2 and constitutes with it a passage 21 communicating with the volume V1 through openings 22 of the socket 3.
  • the part 20 has a solid part 20A, forming a blowing nozzle, in contact with the rod 7; the part 20 delimits inside it a volume V3 which can communicate with the volume V2, when the valve 16 is open, by holes 14B made in the fingers 14; the volume V3 communicates with the volume V2, when the rod 7 is pulled to the right of the figure, by the passage 24 between the parts 17 and 20A; finally, the volume V2 communicates with the passage 21, when the valve 16 is pushed to the left of the figure, by holes 16A made in this valve.
  • the circuit breaker works as follows:
  • the operating rod 8 is actuated by a mechanism not shown but conventional in the circuit breaker technique; the rod moves to the right of the figure and causes the movable arcing contact 7.
  • the main contacts 4 and 9 separate, and the current then passes through the shell 2, the part 15, the fingers 14, the rod 7 , contacts 6 and socket 5.
  • the increase in pressure in the volume V2 is still insufficient to move the valve 16; but it allows a small blowing of the arc by displacement of the gas from V2 to V3, when the end of the rod 7 exceeds the segment 17A, then from V2 to V1, when the end of the rod 7 exceeds the nozzle 20A .
  • the gas of volume V2 relaxes and comes to lick the contact 14A, at one of the roots of the arc; when the contact 7A exceeds the nozzle 20A, the gas of the volume V3 escapes through the passage 24, comes to lick the contact 7A, at the other root of the arc and is evacuated through the holes 16A and the nozzle 20A.
  • the device allows a double blowing of the arc to cut the strong currents, which is a guarantee of efficiency.
  • the orifices 11 and 12 allow a free circulation of the gas inside the device, which promotes stirring ensuring the regeneration of the dielectric power after each operation.
  • the current is cut off for all the values of the current at cut.
  • the revolutionary construction allows easy adjustment and maintenance.
  • the invention applies to medium voltage circuit breakers, for example between 3 and 45 kilovolts.

Landscapes

  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (3)

  1. Mittelspannungstrennschalter, der im Inneren einer mit einem dielektrischen Gas gefüllten Hülle (1, 2) eine Trennkammer aufweist, die einen feststehenden Hauptkontakt (4), einen beweglichen Hauptkontakt (9) und ein erstes Volumen (V2) in der Nähe eines feststehenden Lichtbogenkontakts (7) und eines beweglichen Lichtbogenkontakts (14), ein zweites Volumen (V3) neben dem ersten Volumen (V2) und in Verbindung mit Mitteln (14B, 16) zum Verbinden des ersten und des zweiten Volumens, und ein drittes Volumen (V1), das Mitteln (16, 16A, 21; 22) zum Verbinden des ersten und des dritten Volumens zugeordnet ist, wobei die Herstellung der jeweiligen Verbindungen nur erfolgt, wenn der Wert des zu unterbrechenden Stroms im Laufe eines Abschaltvorgangs einen gegebenen Schwellenwert erreicht,
    dadurch gekennzeichnet, daß
    - das erste Volumen (V2) durch den aus einer beweglichen Metallstange bestehenden beweglichen Lichtbogenkontakt, den feststehenden Lichtbogenkontakt und ein isolierendes rohrförmiges Teil (17) begrenzt wird, das mit dem feststehenden Lichtbogenkontakt fest verbunden ist,
    - das zweite Volumen (V3) von einer Hülse (20) begrenzt ist, die die Lichtbogenkontakte und das isolierende rohrförmige Teil (17) umgibt,
    - das dritte Volumen (V1) durch das restliche Volumen der Hülle (1) gebildet ist,
    und daß:
    - das erste Volumen (V2) über Löcher (14B), die in den feststehenden Lichtbogenkontakt eingearbeitet sind, mit dem zweiten Volumen (V3) in Verbindung steht, wobei die Löcher durch einen Schieber (16) verschließbar sind, der der Rückholkraft einer Feder (18) unterliegt,
    - das erste Volumen (V2) und das zweite Volumen (V3) durch einen von der Hülse (20) und der Hülle (2) definierten Kanal (21) mit dem dritten Volumen (V1) in Verbindung gebracht werden, wenn das Ventil geöffnet wird, derart, daß ein erstes Beblasen des Lichtbogens am feststehenden Lichtbogenkontakt ermöglicht wird, und
    - das zweite Volumen (V3) durch zweite Kanäle (24) in Verbindung mit dem ersten Volumen (V2) gebracht wird, derart, daß ein zweites Beblasen des Lichtbogens am beweglichen Lichtbogenkontakt ermöglicht wird.
  2. Trennschalter nach Anspruch 1, dadurch gekennzeichnet, daß der feststehende Lichtbogenkontakt aus Fingerkontakten besteht.
  3. Trennschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Schieber (16) durch den Druck im ersten Volumen (V2) in Abhängigkeit von der Stärke des zu unterbrechenden Stroms betätigt wird.
EP90108556A 1989-05-11 1990-05-07 Mittelspannungsschalter mit Selbstbeblasung Expired - Lifetime EP0398116B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90108556T ATE103415T1 (de) 1989-05-11 1990-05-07 Mittelspannungsschalter mit selbstbeblasung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8906199A FR2646960B1 (fr) 1989-05-11 1989-05-11 Disjoncteur a moyenne tension a autosoufflage
FR8906199 1989-05-11

Publications (2)

Publication Number Publication Date
EP0398116A1 EP0398116A1 (de) 1990-11-22
EP0398116B1 true EP0398116B1 (de) 1994-03-23

Family

ID=9381583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108556A Expired - Lifetime EP0398116B1 (de) 1989-05-11 1990-05-07 Mittelspannungsschalter mit Selbstbeblasung

Country Status (4)

Country Link
EP (1) EP0398116B1 (de)
AT (1) ATE103415T1 (de)
DE (1) DE69007531T2 (de)
FR (1) FR2646960B1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811508C2 (de) * 1977-03-24 1983-06-16 Mitsubishi Denki K.K., Tokyo Elektrischer Druckgasschalter
CA1097396A (en) * 1977-03-24 1981-03-10 Masami Kii Self-extinguishing type circuit interrupter
IT8420599V0 (it) * 1984-01-20 1984-01-20 Sace Spa Interruttore elettrico a fluido di estinzione dell'arco con autogenerazione di pressione per decomposizione del fluido.
DE3440212A1 (de) * 1984-10-10 1986-04-17 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Druckgasschalter
FR2622737B1 (fr) * 1987-11-04 1995-04-14 Merlin Gerin Disjoncteur electrique a auto-expansion a volume de chambre d'extinction variable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BROWN BOVERI REVIEW, vol. 3, 1987, pages 150-156, Baden (CH), A. Plessl et al.: "A New SF6 Self-Extinguishing, MV Distribution Circuit-Breaker" *

Also Published As

Publication number Publication date
ATE103415T1 (de) 1994-04-15
FR2646960B1 (fr) 1993-12-10
DE69007531D1 (de) 1994-04-28
FR2646960A1 (fr) 1990-11-16
DE69007531T2 (de) 1994-06-30
EP0398116A1 (de) 1990-11-22

Similar Documents

Publication Publication Date Title
EP0385886B1 (de) Lastschalter mit rotierendem Lichtbogen und mit Zentrifugal-Effekt des Löschgases
FR2896336A1 (fr) Disjoncteur sectionneur d'alternateur de structure compacte
CA2044517C (fr) Disjoncteur a varistance incorporee
EP0591039B1 (de) Hochspannung selbst-Blaslastscharter mit Schnittkammer mit reduzierter Gaskompression
EP0302390B1 (de) Druckgasschalter für Hoch- oder Mittelspannung mit von der Lichtbogenenergie entnommener Ausschaltenergie
EP0380907B1 (de) Druckgasschalter für Hoch- und Mittelspannung
EP0240397A1 (de) Selbstbeblasender elektrischer Lastschalter mit rotierendem Lichtbogen
FR2638564A1 (fr) Disjoncteur a haute tension a gaz dielectrique sous pression
FR2576144A1 (fr) Disjoncteur a haute tension, a gaz comprime, a faible energie de manoeuvre
EP0807945B1 (de) Hochspannungsschalter mit Einschaltwiderstand
EP0441292A1 (de) Mittelspannungsschalter mit Selbstbeblasung
EP0398211B1 (de) Hochspannungs-Lastschalter mit dielektrischem Löschgas
EP0415098B1 (de) Selbstblasschalter für Mittelspannung
EP0398116B1 (de) Mittelspannungsschalter mit Selbstbeblasung
EP0759629B1 (de) Lastschalter mit Einschaltwiderstand und Einfügungsvorrichtung
FR2629260A1 (fr) Disjoncteur a haute tension a faible energie de manoeuvre
EP0398213B1 (de) Mittelspannungsschalter für hohen Nennstrom
EP0456025B1 (de) Hochspannungsschalter mit Hilfslichtbogen in Reihe
FR2679375A1 (fr) Contact pour disjoncteur.
EP0458236B1 (de) Mittelspannungsschalter
FR2646961A1 (fr) Disjoncteur a moyenne tension a autosoufflage
EP0532394A1 (de) Schaltvorrichtung ohne natürlichen Nulldurchgang des Stromes
EP0009446A1 (de) Hochspannungsdruckgasschalter
FR2704685A1 (fr) Disjoncteur à énergie de manÓoeuvre d'ouverture réduite.
EP0627751A1 (de) Lastschalter mit doppelter Lichtbogenverlängerung zum Auslösen von Stromen mit grosse Gleichstromkomponente

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE DK ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19901227

17Q First examination report despatched

Effective date: 19930326

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE DK ES FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940323

Ref country code: DK

Effective date: 19940323

Ref country code: AT

Effective date: 19940323

REF Corresponds to:

Ref document number: 103415

Country of ref document: AT

Date of ref document: 19940415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69007531

Country of ref document: DE

Date of ref document: 19940428

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940412

ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

EAL Se: european patent in force in sweden

Ref document number: 90108556.3

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020416

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020502

Year of fee payment: 13

Ref country code: GB

Payment date: 20020502

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020511

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020513

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030507

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030508

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031202

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030507

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050507