EP0704872B1 - Mittelspannungsschalter oder Schutzschalter - Google Patents

Mittelspannungsschalter oder Schutzschalter Download PDF

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Publication number
EP0704872B1
EP0704872B1 EP19950410095 EP95410095A EP0704872B1 EP 0704872 B1 EP0704872 B1 EP 0704872B1 EP 19950410095 EP19950410095 EP 19950410095 EP 95410095 A EP95410095 A EP 95410095A EP 0704872 B1 EP0704872 B1 EP 0704872B1
Authority
EP
European Patent Office
Prior art keywords
driver
switch according
spring
arcing
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
Application number
EP19950410095
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English (en)
French (fr)
Other versions
EP0704872A1 (de
Inventor
Denis Schneider Electric Perrin
Reynald Schneider Electric Marin-Pache
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
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Anticipated expiration legal-status Critical
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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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements

Definitions

  • the present invention relates to a medium voltage switch or circuit breaker comprising an arc extinguishing chamber formed by a cylinder closed by two bottoms, said chamber containing a fixed arcing contact secured to one of the aforementioned funds and electrically connected to a first current supply conductor, and a movable arcing contact mounted at longitudinal sliding across the other of the two bottoms and electrically connected to a second current supply conductor.
  • the aforementioned movable arcing contact is moved to translation by a control mechanism ensuring the closing and separation of arcing contacts, the pressure of said contacts in the closed position being maintained by a pressure spring acting on the movable contact and whose force corresponds substantially to the electrodynamic forces of repulsion of the arcing contacts generated by current flow.
  • Japanese patent application No. 190063/1993 describes several embodiments of a circuit breaker, one of which has the characteristics mentioned above.
  • the pressure spring is mounted in compression between a part intermediate acting on the movable contact and a plate connected to a control rod articulated on the circuit breaker support.
  • circuit breaker described in patent document FR 2 677 168 (closest state of the art) of the plaintiff, comprising two main contacts shunted by two butted arcing contacts in the closed position.
  • the movable contact is controlled by a mechanism comprising on the one hand, a toggle formed by a crank and a connecting rod to said contact mobile, and on the other hand a precompressed pressure spring between the crank and a pin belonging to the connecting rod and sliding in a light provided in said crank, said spring being active when the toggle is near the point dead.
  • circuit breakers of the kind previously mentioned have certain disadvantages.
  • One of these drawbacks is that the inertia of the moving parts, during the opening and closing operations of the arcing contacts, influences the speed of moving the moving contact.
  • Another of these drawbacks is that the maintenance of the contact force generates stresses in the parts external to the device disconnection because the mechanism for controlling the movable contact participates in maintaining the contact pressure.
  • the present invention solves these problems and proposes a switch or circuit breaker for simple and compact design, reducing the number of moving parts whose inertia influences the speed and acceleration of mobile contact, while eliminating stresses generated in parts outside the cut-off device during maintenance contact pressure.
  • the present invention relates to a medium voltage electric switch of the genre including an arc extinguishing chamber of substantially cylindrical and closed shape by two fixed bottoms, said chamber containing a fixed arcing contact secured to one of the aforementioned funds and electrically connected to a first current supply conductor and a movable arcing contact mounted to slide longitudinally through the other of the two bottoms, said movable contact being electrically connected to a second current supply conductor and being driven by a control mechanism ensuring the closing and the separation of said arcing contacts, the pressure of the contacts in the closed position being maintained by a spring acting on the movable contact,
  • this switch being characterized in that it comprises an energy storage mechanism cooperating with the aforementioned control mechanism so as to ensure, during a closing operation, the closing of the arcing contacts, then compression of the aforementioned spring, said spring in the compressed state acting on the movable contact to realize the pressure of the arcing contacts, the energy accumulated during compression of the spring being used to ensure rapid separation arcing contacts during an
  • the above-mentioned energy accumulation mechanism comprises a coach in the general form of a frame, mounted to slide in a first support fixed and housing the aforementioned chamber, said coach being in support, by its upper part, on one end of the aforementioned spring, the other end of which bears on the support aforementioned, while its lower part cooperates with a neutral passage system articulated on the one hand, to the control mechanism and on the other hand, to the movable arcing contact.
  • this mechanism further comprises a stop intended for limit the translational travel of the coach during an opening maneuver arcing contacts.
  • the neutral passage system comprises at minus a toggle joint articulated to a connecting rod of the mechanism said knee switch in the vicinity of neutral in the position of closing of the arcing contacts and cooperating by its lower part with the lower part of the coach.
  • this system comprises two knee pads situated on either side of the coach and connected by a connecting element bearing on the lower part of the coach.
  • the aforementioned kneepad (s) is (are) made up each by two connecting rods connected in an articulated manner by one of their ends between them, said connecting rods being connected in an articulated manner by their other end respectively, to the movable contact and to a guide rod, articulated on a second fixed support.
  • the toggle (s) is (are) each made up of a crank double articulated on the movable arcing contact and comprising two single cranks respectively connected in an articulated manner to the drive rod of the control and a connecting rod hingedly connected to a guide rod articulated on a second fixed support.
  • the neutral passage system comprises at least a cam connected in an articulated manner to a connecting rod for the mechanism of control and comprising an arcuate groove in which slides a lug secured to the movable contact, said cam being also hingedly connected to a connecting rod articulated guide on a second fixed support and cooperating with the lower part of the coach.
  • the first and second supports are respectively connected electrically to the first and second current supply conductors.
  • the aforementioned spring is mounted around the rod of a screw through the upper part of the coach and the first fixed support to screw into the fixed arcing contact.
  • the movable contact comes to bear on a stop formed on the coach so that the impact energy generated by the displacement of the contact mobile is absorbed by the spring.
  • This pole D comprises a chamber arc extinction 5 constituted by a cylinder closed by two bottoms 5a, 5b and containing two arcing contacts 1, 2 respectively fixed and mobile.
  • the fixed arcing contact 1 is integral with one of the aforementioned bottoms 5a and electrically connected to a first current supply conductor 20, while the movable arcing contact 2 is slidably mounted across the other of the bottoms 5b by being electrically connected to a second current supply conductor 21, and mechanically to a control C.
  • This control mechanism C comprises a drive rod (or rod 11) connected in an articulated manner to a double crank 30 connected to another connecting rod 31, which is connected to a drive shaft 32.
  • this pole D further comprises a mechanism known as energy storage A comprising a drive device, said coach 4, in general frame form, a system with passage from neutral S, and a pressure spring 3.
  • the driver 4 comprises a part upper 4a forming a lifting beam and a lower part 4b in the shape of a U, these parts being connected by two tie rods 4c, 4d mounted to slide through a support 6, said first, constituting the first supply conductor of the aforementioned current 20.
  • the lower part in U shape 4b of the coach 4 is slidably mounted through a second support 13 constituting the second current supply conductor 21.
  • the arc extinguishing chamber 5 is housed inside the coach 4 and the pressure spring 3 is supported, by one 3a of its ends, on the upper part 4a of the coach, and, by its other end 3b on the above-mentioned fixed support 6.
  • This spring is also mounted around the rod 22 with a screw 23 passing through the upper part 4a of the coach 4 and the first support 6 for screwing in the fixed arcing contact 1.
  • the system with passing through neutral S comprises on each side of the coach 4, two knee pads 7, 8 each constituted by two connecting rods 9,10 hingedly connected together, by one of their ends.
  • one of the connecting rods is a double crank 14 made up of two simple cranks 15,16, said crank being hingedly connected at a point located between its two cranks 15, 16 at the movable contact 2.
  • One 16 of the simple cranks is further connected to an intermediate rod 17, which is connected to a guide rod 12 articulated on the second fixed support 13, while the other crank 15 is connected so articulated to the control rod 11.
  • the two knee pads 7, 8 are connected by a pin or the like (not shown) bearing on the lower part 4b of the coach 4.
  • the point passing system dead S comprises, on each side of the trainer 4, a cam 18 articulated on the rod of control 11 and comprising a circular groove 18a in which slides a lug 18b secured to the movable arcing contact 2, said cam 18 being further articulated on the connecting rod guide 12 above while bearing on the lower part 4b of the coach 4.
  • circuit breaker of the invention The operation of the circuit breaker of the invention will be described below with reference to figures.
  • the pole D cut-off mechanism is in the open position stable, arcing contacts 1, 2 being open.
  • the control rod 11 moved in the direction of arrow F, which resulted in a rotation of the crank 14 (respectively of the connecting rod 9) around the X axis, counterclockwise shows, causing an upward movement of the movable contact 2, until the arcing contacts 1, 2 are closed ( Figures 3 and 6). In this position, the contact pressure is not insured.
  • the drive rod 11 is moved in the opposite direction to the previous one, which generates a rotation of the crank 14 and the connecting rod 17.
  • the energy accumulated by the spring 3 during compression turns into kinetic energy, and the drive 4 is biased upwards by the spring 3 until it comes to bear against the stop 33 formed at the upper part of the screw 23 ( Figures 2,3 and 4), position shown in Figures 3 and 6.
  • the crank 14 and the connecting rod 17 are set in speed, which causes separation at high speed of the arcing contacts 1, 2, and the abutment of the movable contact 2, on a another stop 34, formed on the coach 4, the impact energy thus being absorbed by the pressure spring 3.
  • a circuit breaker or switch has been produced in which the inertia parts linked to the maintenance of the contact pressure does not affect the speed of displacement of the movable contact, and in which the stresses due to the maintenance of the effort of contact are minimized in parts outside the circuit breaker.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (11)

  1. Mittelspannungs-Lastschalter, der bauarttypisch eine annähernd zylindrische, durch zwei ortsfeste Böden verschlossene Lichtbogenlöschkammer (5) umfaßt, welche Lichtbogenlöschkammer einen, an einem der genannten Böden befestigten und mit einem ersten Stromzuführungsleiter elektrisch verbundenen feststehenden Lichtbogenkontakt (1) sowie einen, in Längsrichtung gleitend durch den anderen der beiden Böden geführten beweglichen Lichtbogenkontakt (2) enthält, wobei der genannte bewegliche Kontakt (2) mit einem zweiten Stromzuführungsleiter elektrisch verbunden ist sowie durch einen, die Einschaltung und Trennung der genannten Lichtbogenkontakte gewährleistenden Antriebsmechanismus bewegt wird und die Kontaktkraft in der Einschaltstellung durch eine, auf den beweglichen Kontakt (2) wirkende Feder (3) aufrechterhalten wird,
    dadurch gekennzeichnet ist, daß er einen Kraftspeicherantrieb (A) mit einem im wesentlichen rahmenförmigen Mitnehmer (4) umfaßt, der in einem ersten, die genannte Löschkammer (5) tragenden, feststehenden Stützkörper (6) gleitend gelagert ist, wobei sich der genannte Mitnehmer (4) mit seinem Oberteil (4a) an einem (3a) der Enden der genannten Feder (3) abstützt, deren anderes Ende (3b) sich gegen den genannten Stützkörper (6) stemmt, während das Unterteil (4b) des Mitnehmers mit dem Antriebsmechanismus (C) des beweglichen Lichtbogenkontakts (2) zusammenwirkt, derart daß bei einer Einschalthandlung das Schließen der Lichtbogenkontakte (1, 2) und die anschließende Kompression der genannten Feder (3) gewährleistet wird, welche genannte Feder (3) dann auf den beweglichen Kontakt (2) wirkt, um die Kontaktkraft der Lichtbogenkontakte (1, 2) zu erzeugen, wobei die bei der Kompression der Feder (3) gespeicherte Energie es erlaubt, bei einer Ausschalthandlung eine schnelle Trennung der Lichtbogenkontakte (1, 2) zu gewährleisten.
  2. Lastschalter nach Anspruch 1, dadurch gekennzeichnet, daß der Antriebsmechanismus (C) über ein mit dem Unterteil (4b) des Mitnehmers zusammenwirkendes Übertotpunktsystem (S) mit dem beweglichen Kontakt (2) gekoppelt ist.
  3. Lastschalter nach Anspruch 2, dadurch gekennzeichnet, daß er darüber hinaus einen Anschlag (33) umfaßt, der dazu dient, den geradlinigen Hub des Mitnehmers (4) bei einer Ausschalthandlung der Lichtbogenkontakte zu begrenzen.
  4. Lastschalter nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß das Übertotpunktsystem (S) mindestens ein Kniehebelgelenk (7) umfaßt, das mit einem Übertragungshebel (11) des Antriebsmechanismus' (C) gelenkig verbunden ist, wobei sich das genannte Kniehebelgelenk (7) in der Einschaltstellung der Lichtbogenkontakte (1, 2) in der Nähe der Totpunktlage befindet und über sein Unterteil mit dem Unterteil (4b) des Mitnehmers (4) zusammenwirkt.
  5. Lastschalter nach Anspruch 4, dadurch gekennzeichnet, daß das Übertotpunktsystem (S) zwei Kniehebelgelenke (7, 8) umfaßt, die auf beiden Seiten des Mitnehmers (4) angeordnet und über ein Verbindungselement miteinander verbunden sind, welches sich am Unterteil (4b) des Mitnehmers (4) abstützt.
  6. Lastschalter nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß das/die genannte/n Kniehebelgelenk/e (7, 8) jeweils aus zwei Gelenkhebeln (9, 10) besteht/bestehen, die über eines ihrer Enden miteinander und über ihr anderes Ende mit dem beweglichen Kontakt (2) bzw. mit einer, an einen zweiten feststehenden Stützkörper (13) angelenkten Führungsstange (12) gelenkig verbunden sind.
  7. Lastschalter nach irgendeinem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß das/die genannte/n Kniehebelgelenk/e (7, 8) jeweils aus einem Zweifachkurbelarm (14) besteht/bestehen, der an den beweglichen Lichtbogenkontakt angelenkt ist und zwei Einfachkurbelarme (15, 16) umfaßt, die jeweils mit dem Übertragungshebel (11) bzw. einer Kopplungsstange (17) gelenkig verbunden sind, welche an eine, mit einem zweiten feststehenden Stützkörper (13) gelenkig verbundene Führungsstange (12) angelenkt ist.
  8. Lastschalter nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Übertotpunktsystem (S) mindestens eine Steuerkurve (18) umfaßt, die mit einem Übertragungshebel (11) des Antriebsmechanismus' gelenkig verbunden ist und eine bogenförmige Kulisse (18a) aufweist, in der ein fest mit dem beweglichen Kontakt (2) verbundener Zapfen (18a) entlanggleitet, wobei die genannte Steuerkurve (18) darüber hinaus mit einer, an einen zweiten feststehenden Stützkörper (13) angelenkten und mit dem Unterteil (4b) des Mitnehmers (4) zusammenwirkenden Führungsstange (12) gelenkig verbunden ist.
  9. Lastschalter nach irgendeinem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß der erste und der zweite Stützkörper (6, 13) jeweils mit dem ersten bzw. zweiten Stromzuführungsleiter (20, 21) elektrisch verbunden sind.
  10. Lastschalter nach irgendeinem der Ansprüche 2 bis 9, dadurch gekennzeichnet, daß die genannte Feder (3) um den Schaft (22) einer Schraube (23) geführt ist, die das Oberteil (4a) des Mitnehmers (4) sowie den ersten feststehenden Stützkörper (6) durchragt und in den feststehenden Lichtbogenkontakt (1) eingeschraubt ist.
  11. Lastschalter nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in der Endphase der Ausschalthandlung der bewegliche Kontakt (2) gegen einen am Mitnehmer (4) ausgebildeten Anschlag (34) geführt wird, derart daß die durch die Bewegung des beweglichen Kontakts (2) erzeugte Stoßenergie von der Feder (3) aufgenommen wird.
EP19950410095 1994-09-29 1995-09-05 Mittelspannungsschalter oder Schutzschalter Expired - Lifetime EP0704872B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9411775A FR2725303B1 (fr) 1994-09-29 1994-09-29 Interrupteur ou disjoncteur moyenne tension
FR9411775 1994-09-29

Publications (2)

Publication Number Publication Date
EP0704872A1 EP0704872A1 (de) 1996-04-03
EP0704872B1 true EP0704872B1 (de) 2000-05-10

Family

ID=9467499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950410095 Expired - Lifetime EP0704872B1 (de) 1994-09-29 1995-09-05 Mittelspannungsschalter oder Schutzschalter

Country Status (5)

Country Link
EP (1) EP0704872B1 (de)
CN (1) CN1062378C (de)
DE (1) DE69516790T2 (de)
ES (1) ES2147827T3 (de)
FR (1) FR2725303B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1020582C2 (nl) * 2002-05-13 2003-11-25 Holec Holland Nv Aandrijfstang voor schakelaar.
US9082563B2 (en) 2010-03-08 2015-07-14 Mitsubishi Electric Corporation Power breaker
CN103140908B (zh) * 2010-12-20 2015-11-25 三菱电机株式会社 开关设备
US9324521B2 (en) 2010-12-20 2016-04-26 Mitsubishi Electric Corporation Power switchgear
CN110544597A (zh) * 2019-09-30 2019-12-06 山东泰开高压开关有限公司 一种800kV外置式接地开关用辅助灭弧装置及使用方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372353A (en) * 1966-10-20 1968-03-05 Electric Machinery Mfg Co Toggle operated electric vacuum switch
DE3414016A1 (de) * 1984-04-12 1985-10-17 Siemens AG, 1000 Berlin und 8000 München Vakuumschaltgeraet mit einer antriebsvorrichtung sowie mit einer an dem beweglichen anschlussbolzen der schaltroehre abgestuetzten feder
DE3726739A1 (de) * 1987-08-07 1988-03-03 Slamecka Ernst Kontaktdruckerzeugungsvorrichtung insbesondere fuer vakuumschalter in einfach- oder zweifach-reihen-anordnung
FR2677168B1 (fr) 1991-06-03 1994-06-17 Merlin Gerin Disjoncteur moyenne tension a energie de commande reduite.
DE4133092A1 (de) * 1991-09-30 1993-04-01 Siemens Ag Mehrpoliger vakuumschalter mit einer polantriebseinheit fuer jede vakuumschaltroehre
JPH05190063A (ja) 1992-01-17 1993-07-30 Toshiba Corp 真空遮断器

Also Published As

Publication number Publication date
EP0704872A1 (de) 1996-04-03
DE69516790T2 (de) 2000-11-16
ES2147827T3 (es) 2000-10-01
CN1125353A (zh) 1996-06-26
CN1062378C (zh) 2001-02-21
FR2725303B1 (fr) 1996-10-31
FR2725303A1 (fr) 1996-04-05
DE69516790D1 (de) 2000-06-15

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