EP0592338B1 - Mechanismus für einen Erdungsschalter - Google Patents

Mechanismus für einen Erdungsschalter Download PDF

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Publication number
EP0592338B1
EP0592338B1 EP19930420392 EP93420392A EP0592338B1 EP 0592338 B1 EP0592338 B1 EP 0592338B1 EP 19930420392 EP19930420392 EP 19930420392 EP 93420392 A EP93420392 A EP 93420392A EP 0592338 B1 EP0592338 B1 EP 0592338B1
Authority
EP
European Patent Office
Prior art keywords
contact
switch
bearing shaft
earthing switch
dead point
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
EP19930420392
Other languages
English (en)
French (fr)
Other versions
EP0592338A1 (de
Inventor
Patrick Bonnardel
Jacques Quenin
Norbert Perrichon
Jean-Louis Sonzogni
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 SE
Original Assignee
Schneider Electric SE
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0592338A1 publication Critical patent/EP0592338A1/de
Application granted granted Critical
Publication of EP0592338B1 publication Critical patent/EP0592338B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/04—Interlocking mechanisms
    • H01H31/10—Interlocking mechanisms for interlocking two or more switches

Definitions

  • the invention relates to the field of electrical protection cells, for example for the protection of a medium voltage transformer, comprising a switch or a circuit breaker arranged in series with an earthing switch. It relates to more particularly the disconnector opening and closing mechanism, from maneuvers of the operating member associated with the switch.
  • such a mechanism can be a passage mechanism of neutral point capable of being coupled, via a mechanism interlocking, to the operating member of the switch associated in series with the earthing switch, so that the operating member of the switch controls simultaneously opening the switch and closing the earthing switch, respectively closing the switch and opening the earthing switch.
  • the earthing switch comprises a fixed contact connected electrically at the switch, and a movable contact carried by a contact-carrying shaft rotating and earthed.
  • document US-A-3,735,073 discloses a single switch comprising a double spring mechanism, a first spring to flip the switch of the open position to the closed position, and a second spring to overcome the forces electromagnetic when an electrical fault occurs.
  • the invention aims to remedy the drawback mentioned above, by proposing a particularly reliable and safe mechanism with regard to electrical protection provided by the cell.
  • the passage from the neutral point of the first mechanism takes place substantially at the end of the stroke of the operating member associated with the switch, and the first angular position corresponds to the position of the contact carrier shaft in stable position disconnector open.
  • the operation of the operating member is so-called “independent”, that is to say that the rotary contact shaft does not start actually in motion only when the operating member is almost at the end and therefore the switch is already in the open position.
  • the operation of the operating member is said to be “dependent”, that is to say that the setting in motion of the operating member directly results in a movement of the contact carrier shaft.
  • the first mechanism is located at one end of the axis of rotation of the contact carrier shaft, while the second mechanism is located at the other end of said axis of rotation.
  • the protection cell 1 has an inlet electrical 2 and an electrical outlet 6. Connected in series between inlet 2 and outlet 3, there is for example a switch or a circuit breaker 3 with three positions (closed, open, earthed) with break in SF6 gas, fuse 4 and a disconnector earth 5.
  • the disconnector 5 conventionally comprises a fixed contact 8 and a contact rotary mobile 7.
  • An interlocking mechanism 11 is provided between the operation 13 of the switch 3 and the opening and closing mechanism of the disconnector 5, so that the drive of the operating member 13 controls simultaneously opening the switch 3 and closing the disconnector 5, respectively the closing of the switch 3 and the opening of the disconnector 5.
  • protection cell 1 will have three circuits electrical identical to that of Figure 2, arranged in parallel. Such a cell protection is particularly well suited for the protection of transformers medium voltage.
  • FIG. 3 illustrates a three-phase disconnector comprising three fixed contacts 8a, 8b and 8c and three movable contacts 7a, 7b and 7c, the latter being mounted on a carrier shaft contact 9, pivotally mounted about an axis 10.
  • the mechanism opening and closing of the disconnector is coupled to the operating member 13 of the switch 3 by means of a locking rod 11 movable in translation along its length.
  • One of the ends of the rod 11 carries a connecting rod 12 articulated on the member of rotary operation 13 of switch 3, while the other end carries a guide 11a provided with a rectilinear light 34 arranged parallel to the rod 11 and intended to cooperate with the disconnector mechanism 5.
  • the disconnector mechanism comprises a first 30 and a second 20 mechanisms at neutral.
  • the passage mechanisms to neutral 20 and 30 are located on either side of the axis 10 of rotation of the carrier shaft contact 9 so as to balance the mobile assembly.
  • the first neutral passage mechanism 30 illustrated in FIGS. 4 to 6, 8, 9 and 11 is supported by a fixed frame 40a on which the axis 10 of the carrier shaft is mounted contact 9.
  • the mechanism 30 comprises a crank 32 rotatably mounted around a axis 33 carried by a fixed frame 40a.
  • Crank 32 is equipped with a first roller 35 which cooperates with the rectilinear light 34 of the guide 11a, and of a second roller 36 which cooperates with a light 37 of complex shape, formed in part 9a of the tree contact carrier 9.
  • the crank 32 is biased by an anchored tension spring 31, of a on the crank 32 at point 31a, and on the other hand on the fixed frame 40a at point 31b.
  • the contact-carrying shaft 9 forms a angle ⁇ with respect to a fixed arbitrary reference, for example the horizontal in the case present.
  • the second neutral passage mechanism 20 illustrated in FIGS. 7 and 10 comprises a tension spring 21 anchored, on the one hand at point 21a on a bevel gear 9b integral with the contact-carrying shaft 9, and on the other hand on the fixed frame 40b at point 21b.
  • the contact-carrying shaft 9 therefore remains stationary. After a certain idle stroke, the organ maneuver 13 being practically at the end of its travel, the end of the light 34 comes abut on the roller 35 and causes the crank 32 to rotate about the axis 33.
  • the spring 31 resistant so far, comes to take its neutral position ( Figure 5, the points 31a, 33 and 31b are aligned), the contact carrier shaft 9 still having not moved due to the free movement of the roller 36 inside the slot 37.
  • the spring 31 As soon as the spring 31 has passed its neutral position, it becomes a motor and puts the shaft contact 9 in rotation through the roller 36 and the light 37.
  • the maneuver 13 arrived at the end of the race ( Figure 6).
  • the closing of the disconnector 5 is said to be independent, the displacement of the shaft carries contact 9 not being directly coupled to the drive of the operating member 13, because it is slightly delayed. It will thus be understood that any foreign body preventing accidentally closing the disconnector 5, cannot in any case prevent the opening of the switch 3.
  • the contact carrying shaft 9 can be fitted with a angular position indicator, it will then suffice to check, before any intervention on the installation, that the disconnector 5 is indeed closed.
  • the passage of the neutral point of the spring 31 when the disconnector is closed corresponds to the angular position ⁇ of the contact carrier arm in open position; however, those skilled in the art will understand easily that this feature is not imperative.
  • the angular position ⁇ of the passage of the neutral point of the spring 21 associated with the mechanism 20 should always be between the angular positions ⁇ and ⁇ of the passages the neutral point of the spring 31 associated with the mechanism 30, respectively at closing and when the disconnector opens.
  • the passage from the neutral point of the mechanism 30 precedes the passage of the neutral point of the mechanism 20, whatever the direction of the maneuver of the control member 13; preferably these three angular positions ⁇ and ⁇ and ⁇ are closer to the open position than to the closed position.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (8)

  1. Sprungpunktmechanismus für einen Erdungsschalter (5), der dazu dient, über einen Mechanismus zur gegenseitigen Verriegelung (11) an das Antriebsorgan (13) eines mit dem genannten Erdungsschalter in Reihe geschalteten Lastschalters (3) angekoppelt zu werden, derart daß das Antriebsorgan des Lastschalters jeweils gleichzeitig das Ausschalten des Lastschalters (3) und das Einschalten des Erdungsschalters (5) bzw. das Einschalten das Lastschalters (3) und das Ausschalten des Erdungsschalters (5) bewirkt, wobei der genannte Erdungsschalter einen, elektrisch mit dem Lastschalter verbundenen feststehenden Kontakt (8) sowie einen, von einem drehbaren Kontaktträger (9) getragenen und elektrisch mit Erde verbundenen beweglichen Kontakt (7) umfaßt, dadurch gekennzeichnet, daß er
    einen, durch die Bewegungen des Antriebsorgans (13) angesteuerten, ersten Sprungpunktmechanismus (30), dessen Sprungstellung einerseits einer ersten Winkellage (α) des Kontaktträgers (9) beim Einschalten des Erdungsschalters und andererseits einer zweiten Winkellage (α) des Kontaktträgers (9) beim Ausschalten des Erdungsschalters entspricht, wobei der erste Mechanismus (30) eine erste Feder (31) aufweist, die mit einem ihrer Enden an einem feststehenden Chassis (40a) und mit ihrem anderen Ende an einem Gelenkhebel (32) angehängt ist, welcher um eine ortsfeste Achse (33) verschwenkt und einerseits mit dem Mechanismus zur gegenseitigen Verriegelung (11a) sowie andererseits mit dem Kontaktträger (9) zusammenwirkt, und die Sprungstellung der ersten Feder (31) erreicht ist, wenn diese mit der Schwenkachse des Gelenkhebels (32) fluchtet, sowie
    einen, durch die Bewegungen des Kontaktträgers (9) angesteuerten, zweiten Sprungpunktmechanismus (20) umfaßt, dessen Sprungstellung einer, zwischen der genannten ersten und zweiten Winkellage liegenden dritten Winkellage (β) des Kontaktträgers entspricht, wobei die Überwindung des Sprungpunkts des ersten Mechanismus' (30) sowohl beim Ausschalten als auch beim Einschalten des Erdungsschalters vor der Überwindung des Sprungpunkts des zweiten Mechanismus' (20) erfolgt, der genannte zweite Mechanismus (20) eine zweite Feder (21) umfaßt, die mit einem ihrer Enden an einem feststehenden Chassis (40b) und mit dem anderen Ende am Kontaktträger (9b) angehängt ist, und der Sprungpunkt der zweiten Feder (21) erreicht ist, wenn diese mit der Drehachse des Kontaktträgers (9) fluchtet.
  2. Mechanismus nach Anspruch 1, dadurch gekennzeichnet, daß die Überwindung des Sprungpunkts des ersten Mechanismus' (30) annähernd am Ende des Betätigungshubs des Antriebsorgans (13) erfolgt.
  3. Mechanismus nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die genannte erste Lage (α) der Stellung des Kontaktträgers in der stabilen Ausschaltstellung des Erdungsschalters entspricht.
  4. Mechanismus nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die genannte erste (α), zweite (α) und dritte (β) Winkellage des Kontaktträgers (9) näher an der stabilen Ausschaltstellung des Erdungsschalters als an der stabilen Einschaltstellung des Erdungsschalters liegen.
  5. Mechanismus nach irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der genannte Gelenkhebel (32) einerseits über einen ersten Führungskörper (34, 35) mit dem Mechanismus zur gegenseitigen Verriegelung (11a) und andererseits über einen zweiten Führungskörper (36, 37) mit dem Kontaktträger (9) zusammenwirkt.
  6. Mechanismus nach Anspruch 5, dadurch gekennzeichnet, daß der erste Führungskörper aus einer fest mit dem Gelenkhebel (32) verbundenen, ersten Rolle (35) sowie einer, in einem Gestänge (11a) zur gegenseitigen Verriegelung ausgebildeten, ersten Kulisse (34) und daß der zweite Führungskörper aus einer, fest mit dem Gelenkhebel (32) verbundenen zweiten Rolle (36) sowie einer, im Kontaktträger (9a) ausgebildeten, komplex geformten zweiten Kulisse (37) bestehen.
  7. Mechanismus nach irgendeinem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der genannte erste Mechanismus (30) an einem Ende der Drehachse (10) des Kontaktträgers (9) während der zweite Mechanismus (20) am anderen Ende der genannten Drehachse angeordnet sind.
  8. Mechanismus nach Anspruch 7, dadurch gekennzeichnet, daß die Form der Kulisse (37) und die relative Lage des Gelenkhebels (32) und dessen Rolle (36) so ausgelegt sind, daß sie die Unumkehrbarkeit des Mechanismus' in der stabilen Ausschaltstellung und der stabilen Einschaltstellung gewährleisten.
EP19930420392 1992-10-09 1993-10-04 Mechanismus für einen Erdungsschalter Expired - Lifetime EP0592338B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212276 1992-10-09
FR9212276A FR2696869B1 (fr) 1992-10-09 1992-10-09 Mécanisme pour sectionneur de mise à la terre.

Publications (2)

Publication Number Publication Date
EP0592338A1 EP0592338A1 (de) 1994-04-13
EP0592338B1 true EP0592338B1 (de) 1998-03-04

Family

ID=9434527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930420392 Expired - Lifetime EP0592338B1 (de) 1992-10-09 1993-10-04 Mechanismus für einen Erdungsschalter

Country Status (4)

Country Link
EP (1) EP0592338B1 (de)
DE (1) DE69317198T2 (de)
ES (1) ES2114024T3 (de)
FR (1) FR2696869B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2773001B1 (fr) * 1997-12-19 2000-01-21 Schneider Electric Sa Cellule a moyenne tension a isolement gazeux, et a tenue dielectrique elevee
ATE456147T1 (de) 2004-07-12 2010-02-15 Abb Technology Ag Erdungsschalter
CN102025116B (zh) * 2010-12-17 2012-11-14 安徽鑫龙电器股份有限公司 高压开关设备联锁装置
DE102020202689B4 (de) 2020-03-03 2022-06-09 Siemens Aktiengesellschaft Schaltanordnung für Mittelspannung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE611677C (de) * 1929-11-27 1935-04-02 Neumann Hochspannungs App G M Verteilungsanlage mit Sammelschienensystem, Schaltvorrichtungen und Erdungsschaltern
US3735073A (en) * 1971-11-30 1973-05-22 Westinghouse Electric Corp Circuit interrupter with overcenter spring charging means
DE2453194A1 (de) * 1974-11-09 1976-05-13 Bbc Brown Boveri & Cie Einschaltsicherer erdungsschalter fuer elektrische schalter
US4636594A (en) * 1985-09-24 1987-01-13 G & W Electric Company Switch with auxiliary biasing mechanism

Also Published As

Publication number Publication date
FR2696869A1 (fr) 1994-04-15
FR2696869B1 (fr) 1994-12-02
DE69317198D1 (de) 1998-04-09
ES2114024T3 (es) 1998-05-16
DE69317198T2 (de) 1998-12-03
EP0592338A1 (de) 1994-04-13

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