EP0577530B1 - Selbst-gebläsener Schalter oder Lastschalter - Google Patents
Selbst-gebläsener Schalter oder Lastschalter Download PDFInfo
- Publication number
- EP0577530B1 EP0577530B1 EP93420271A EP93420271A EP0577530B1 EP 0577530 B1 EP0577530 B1 EP 0577530B1 EP 93420271 A EP93420271 A EP 93420271A EP 93420271 A EP93420271 A EP 93420271A EP 0577530 B1 EP0577530 B1 EP 0577530B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- circuit breaker
- switch
- extinguishing chamber
- 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.)
- Expired - Lifetime
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
- H01H33/982—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 in which the pressure-generating arc is rotated by a magnetic field
Definitions
- the present invention relates to a self-expanding switch or circuit breaker, for the field of high or medium voltages.
- a high-voltage circuit breaker with a rotating arc and self-blowing comprising in bypass between the fixed and movable main contacts, an auxiliary circuit for breaking with arc contacts, in which the arc is rotating under the influence of the electromagnetic field of a coil.
- Such a self-expanding and rotating arc circuit breaker combines the pneumatic blowing of the arc by expansion gases with a magnetic blowing of the rotating arc on annular electrodes.
- This breaking method can be used in medium or high voltage circuit breakers and has the advantage of requiring low operating energies.
- a drawback lies in particular in the fact that, when the pole of the circuit breaker is open, all the voltage is applied through the insulating ring which forms one of the two bottoms of the breaking chamber, the other bottom being part of a conductive bell which is closed by this insulating ring.
- This does not pose major problems for a medium voltage, for example of the order of 10 kilovolts, but it is easily understood that the realization becomes more difficult with a high voltage of the order of 200 kilovolts for example.
- the invention aims to remedy this drawback. To this end, it relates to a self-expanding switch or circuit breaker, as defined in one of the independent claims 1 or 5.
- the diameters of the expansion chamber and of the interrupting chamber are practically the same, so that these two chambers practically together form a long, tight enclosure, of tubular shape comprising two bottoms which constitute the two plates opposite of current supply.
- This device comprises a horizontal metal base 1 which forms the first range or current supply terminal and which carries in leaktight manner a long insulating tube 2 made of porcelain or another suitable insulator which constitutes the insulating cylindrical envelope of the chamber. expansion 3 of this self-expanding circuit breaker pole.
- the other end of the elongated cylindrical casing 2 is sealed, in a sealed manner, with a coaxial and cylindrical metal bell 4 whose upper part forms the casing of the breaking chamber 5 of this pole of the circuit breaker, and which is substantially the same diameter as the insulating tube 2.
- the horizontal upper metallic bottom 6 of the cylindrical bell 4 in the form of a thick and flat disc, forms the second range or terminal of current supply, opposite to the other range 1.
- the metal tube 9 also crosses, in a leaktight manner thanks to a seal 15, another insulating annular spacer 16 which constitutes the other bottom of the actual cutting chamber 5.
- a repulsion spring 12 which tends to separate these two tubes 8, 9 longitudinally from one another.
- repulsion spring 18 is placed between the flange 11 of the tube 8 and the underside of the insulating spacer 16, in order to push the sliding tube 8 downwards and consequently to maintain its lower annular edge 19 in mechanical and electrical contact against the upper annular edge of a third metal tube 20 which is carried by the control rod 21 of this pole of the circuit breaker, itself held by a metal tube 36 in which it slides.
- the interrupting chamber 5 is in itself very conventional, and comprises an annular and coaxial induction coil 22 which is fixed, by a tubular metallic transition 23, on the internal face of the metallic bottom 6 of the interrupting chamber 5, and which carries the fixed and annular arc electrode 24, combined with the movable arc electrode 13.
- the metal tube 20 has a bulge 25 which forms the movable main contact of the circuit breaker and which is, in the closed position shown on the left half of the figure, connected to the fixed main contact 26 by an annular elastic clamp 27.
- the tube 20 has radial openings 28 which put its internal space 29 into communication with the internal space 30 of the expansion chamber.
- the operating rod 21 is then pulled down by conventional mechanical means and not shown.
- the rods 20 and 8 then begin to descend, while the rod 9, held in place by the spring 12, remains stationary for the moment.
- the movable main contact 25 then emerges, at point B in FIG. 2, from the clamp 27, conventionally causing the cutting, without creation of an arc since the arcing electrodes 13 and 24 are always in contact, the main contacts 25 , 26.
- the rod 21 is then pulled as far as possible (point G) downwards, which ensures sufficient distance between the tubes 8 and 20.
- the porcelain tube 2 here has a fairly small diameter, practically equal to that of the interrupting chamber 5: the assembly in fact forms a long and narrow tube, the lateral dimensions of which are small.
- FIG. 3 An alternative embodiment is shown in Figure 3.
- the tube 8, the spring 18 and the spacer 7 of Figure 1 no longer exist, and the tube 20 comprises, as for the device according to the document EP -A-0298809 cited above, a bearing face (not shown) of a spring 30 for repulsion towards the top of the tube 9, as well as a hook 31 timed drive for this tube 9 downwards, which allows conventionally to open the main contacts before the arcing contacts 24 and 13.
- the insulating annular spacer 16 maintains in its center a small coaxial metal tube 32 whose lower edge 33 substantially exceeds the level of the lower face 35 of the insulating bottom 16, and whose upper edge 34 is at a distance of the fixed arc electrode 24 which is at least equal to the arc breaking distance (d).
- This tube 32 has an inside diameter equal to the outside diameter of the movable conductive tube 9, so that the movable tube 9 can slide in this sheath tube 32. Means are provided to guarantee their positive electrical connection.
- the tube 9 is shown at a distance (d) from arc cutting.
- this tube 9 is continued to move back until, along the right half of this figure, the mechanical and electrical separation of the tubes 32 and 9. The voltage is then no longer applied to the tube 32, which is electrically isolated. By moving the tube 9 further back, a sufficient isolation distance is guaranteed as before.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
Claims (8)
- Autoexpansions-Leistungsschalter oder -Lasttrenner, wobei jeder Pol dieses Leistungsschalters oder Lasttrenners- zum einen eine Lichtbogenlöschkammer (5), deren erster Boden (6) leitend ausgeführt ist und einen ersten Stromzuführungsanschluß bildet, welcher im Innern dieser Lichtbogenlöschkammer mit einem feststehenden ringförmigen Lichtbogenkontakt (24) verbunden ist, und deren anderer Boden (16) isolierend ausgeführt ist und von einem ersten koaxial angeordneten und axial verschiebbaren leitenden Rohr (9) durchquert wird, wobei das freie Ende dieses Rohres (9) den, dem genannten feststehenden Lichtbogenkontakt (24) zugeordneten beweglichen ringförmigen Lichtbogenkontakt (13) trägt,- zum anderen eine koaxial angeordnete gasdichte Ausdehnungskammer (3), die in der Verlängerung der genannten Lichtbogenlöschkammer liegt und gasdicht mit der genannten Lichtbogenlöschkammer (5) über mindestens einen Kanal (28, 29) verbunden ist, der dazu dient, bei der Entstehung des Lichtbogens während des Ausschaltvorgangs eine Strömung der ionisierten Gase von dieser Lichtbogenlöschkammer (5) in Richtung dieser Ausdehnungskammer (3) zu ermöglichen, wobei die genannte Ausdehnungskammer (3) Hauptkontakte (25, 26) enthält, die einen, mit dem genannten leitenden Boden (6) der Lichtbogenlöschkammer (5) verbundenen feststehenden Kontakt (26) sowie einen an einen zweiten Stromzuführungsanschluß (1) angeschlossenen und fest mit einer Schaltstange (21) verbundenen beweglichen Kontakt (25) umfassen, sowie- mechanische Mittel zur Öffnung dieser Hauptkontakte (25, 26) vor den Lichtbogenkontakten (24, 13) umfaßt, dadurch gekennzeichnet, daß das genannte erste leitende Rohr (9) so ausgelegt ist, daß es beim Zurückziehen aus der Einschaltstellung in die Ausschaltstellung (d) entsprechend der vollständigen Löschung des Lichtbogens mit einem koaxial angeordneten und fest mit dem beweglichen Hauptkontakt (25) verbundenen, zweiten leitenden Rohr (20) elektrisch in Kontakt steht, daß das genannte erste und zweite Rohr (9, 20) so ausgelegt und Mittel (8) dazu vorgesehen sind, daß sich das genannte zweite Rohr (20) nach Erreichen der genannten Ausschaltstellung (d) entsprechend der vollständigen Löschung des Lichtbogens elektrisch und axial vom genannten ersten Rohr trennt und dadurch zwischen diesen eine Gasstrecke entstehen läßt, die ausreichend groß ist, damit die Spannung anschließend an den genannten Hauptkontakten anliegt.
- Autoexpansions-Lasttrenner oder -Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Durchmesser der Ausdehnungskammer (3) und der Lichtbogenlöschkammer (5) praktisch gleich sind, so daß diese beiden Kammern (3, 5) zusammen praktisch ein gasdichtes, rohrförmiges längliches Gehäuse mit zwei Böden (1, 6) bilden, welche die beiden einander gegenüberliegenden Stromzuführungsanschlüsse darstellen.
- Autoexpansions-Lasttrenner oder -Leistungsschalter nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß diese beiden Rohre (9, 20) so ausgeführt sind, daß sie in der Einschaltstellung des Lasttrenners oder Leistungsschalters mit Hilfe eines Zusatzrohres (8) axial hintereinander angeordnet sind, welches den elektrischen und mechanischen Kontakt zwischen ihnen durch elastische Andrückmittel (18) gewährleistet.
- Autoexpansions-Lasttrenner oder -Leistungsschalter nach Anspruch 3, dadurch gekennzeichnet, daß dieses Zusatzrohr (8) verschiebbar um das den beweglichen Lichtbogenkontakt (13) tragende bewegliche Rohr (9) herum montiert ist und durch diese elastischen Mittel (18) nach unten gedrückt wird, so daß sein ringförmiger unterer Rand (19) gegen den ringförmigen oberen Rand des zweiten Rohres (20) gedrückt wird, wobei Anschlagmittel (11, 7) vorgesehen sind, um diese durch mechanischen elastischen Druck gewährleistete Andrückverbindung zu unterbrechen, wenn dieses Zusatzrohr (8) ausgehend von der Einschaltstellung des Leistungsschalters einen Abwärtshub ausgeführt hat, der mindestens ausreicht, um die Löschung des Lichtbogen herbeizuführen.
- Autoexpansions-Lasttrenner oder -Leistungsschalter, wobei jeder Pol dieses Lasttrenners oder Leistungsschalters- zum einen eine Lichtbogenlöschkammer (5), deren erster Boden (6) leitend ausgeführt ist und einen ersten Stromzuführungsanschluß bildet, welcher im Innern dieser Lichtbogenlöschkammer mit einem feststehenden ringförmigen Lichtbogenkontakt (24) verbunden ist, und deren anderer Boden (16) isolierend ausgeführt ist und von einem ersten koaxial angeordneten und axial verschiebbaren leitenden Rohr (9) durchquert wird, wobei das freie Ende dieses Rohres (9) den, dem genannten feststehenden Lichtbogenkontakt (24) zugeordneten beweglichen ringförmigen Lichtbogenkontakt (13) trägt,- zum anderen eine koaxial angeordnete gasdichte Ausdehnungskammer (3), die in der Verlängerung der genannten Lichtbogenlöschkammer liegt und gasdicht mit der genannten Lichtbogenlöschkammer (5) über mindestens einen Kanal (28, 29) verbunden ist, der dazu dient, bei der Entstehung des Lichtbogens während des Ausschaltvorgangs eine Strömung der ionisierten Gase von dieser Lichtbogenlöschkammer (5) in Richtung dieser Ausdehnungskammer (3) zu ermöglichen, wobei die genannte Ausdehnungskammer (3) Hauptkontakte (25, 26) enthält, die einen, mit dem genannten leitenden Boden (6) der Lichtbogenlöschkammer (5) verbundenen feststehenden Kontakt (26) sowie einen an einen zweiten Stromzuführungsanschluß (1) angeschlossenen und fest mit einer Schaltstange (21) verbundenen beweglichen Kontakt (25) umfassen, sowie- mechanische Mittel zur Öffnung dieser Hauptkontakte (25, 26) vor den Lichtbogenkontakten (24, 13) umfaßt, dadurch gekennzeichnet, daß der isolierende ringförmige Boden (16) der Lichtbogenlöschkammer (5) in seiner Mitte ein kleines, koaxial angeordnetes leitendes Rohr (32) hält, dessen oberer Rand (33) in einem Abstand zur feststehenden Lichtbogenelektrode (24) angeordnet ist, der größer ist als der Lichtbogen-Löschabstand (d), wobei der Innendurchmesser dieses Rohres (32) genauso groß ist wie der Außendurchmesser des genannten beweglichen leitenden Rohres (9), so daß dieses leitende Rohr (9) unter Einhaltung einer sicheren elektrischen Verbindung in diesem leitenden Hüllrohr (32) verschoben werden kann, wobei die axiale mechanische und elektrische Trennung dieser beiden Rohre (9, 32) selbsttätig erfolgt, wenn das bewegliche Rohr (9) ausreichend weit zurückgezogen ist, um dieses Hüllrohr (32) freizugeben.
- Autoexpansions-Lasttrenner oder -Leistungsschalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Gehäuse der Lichtbogenlöschkammer (5) aus Metall besteht und daß der feststehende Hauptkontakt (26) an dem mit der Ausdehnungskammer (3) verbundenen Ende des genannten Gehäuses befestigt ist.
- Autoexpansions-Lasttrenner oder -Leistungsschalter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Gehäuse der Ausdehnungskammer (3) aus Porzellan besteht.
- Autoexpansions-Lasttrenner oder -Leistungsschalter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß dem leitenden Boden (6) der Lichtbogenlöschkammer (5) eine Spule (22) oder ein Magnet zugeordnet ist, um den zwischen den Kontakten (13, 14) bei deren Trennung in der Lichtbogenlöschkammer gezogenen Lichtbogen durch Beblasung in Drehung zu versetzen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9208138A FR2693027B1 (fr) | 1992-06-30 | 1992-06-30 | Interrupteur ou disjoncteur a auto-expansion. |
FR9208138 | 1992-06-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0577530A1 EP0577530A1 (de) | 1994-01-05 |
EP0577530B1 true EP0577530B1 (de) | 1997-01-15 |
Family
ID=9431434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93420271A Expired - Lifetime EP0577530B1 (de) | 1992-06-30 | 1993-06-24 | Selbst-gebläsener Schalter oder Lastschalter |
Country Status (6)
Country | Link |
---|---|
US (1) | US5373130A (de) |
EP (1) | EP0577530B1 (de) |
JP (1) | JPH06187879A (de) |
CA (1) | CA2099183A1 (de) |
DE (1) | DE69307411T2 (de) |
FR (1) | FR2693027B1 (de) |
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Family Cites Families (6)
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FR2459543A1 (fr) * | 1979-06-15 | 1981-01-09 | Alsthom Cgee | Disjoncteur a haute tension a arc tournant et autosoufflage |
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. |
FR2617633B1 (fr) * | 1987-07-02 | 1989-11-17 | Merlin Gerin | Disjoncteur a arc tournant et a expansion |
FR2623657A1 (fr) * | 1987-11-19 | 1989-05-26 | Merlin Gerin | Disjoncteur a autosoufflage par expansion de gaz isolant, equipe d'un ecran de repartition de champ electrique |
EP0385886B1 (de) * | 1989-02-27 | 1994-11-09 | Merlin Gerin | Lastschalter mit rotierendem Lichtbogen und mit Zentrifugal-Effekt des Löschgases |
FR2644624B1 (fr) * | 1989-03-17 | 1996-03-22 | Merlin Gerin | Disjoncteur electrique a autoexpansion et a gaz isolant |
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1992
- 1992-06-30 FR FR9208138A patent/FR2693027B1/fr not_active Expired - Fee Related
-
1993
- 1993-06-18 US US08/077,912 patent/US5373130A/en not_active Expired - Lifetime
- 1993-06-24 DE DE69307411T patent/DE69307411T2/de not_active Expired - Fee Related
- 1993-06-24 EP EP93420271A patent/EP0577530B1/de not_active Expired - Lifetime
- 1993-06-25 CA CA002099183A patent/CA2099183A1/en not_active Abandoned
- 1993-06-29 JP JP5159164A patent/JPH06187879A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH06187879A (ja) | 1994-07-08 |
DE69307411T2 (de) | 1997-06-12 |
US5373130A (en) | 1994-12-13 |
FR2693027B1 (fr) | 1997-04-04 |
CA2099183A1 (en) | 1993-12-31 |
EP0577530A1 (de) | 1994-01-05 |
DE69307411D1 (de) | 1997-02-27 |
FR2693027A1 (fr) | 1993-12-31 |
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