EP0449148B1 - Betätigungsvorrichtung für Schalter - Google Patents

Betätigungsvorrichtung für Schalter Download PDF

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Publication number
EP0449148B1
EP0449148B1 EP19910104584 EP91104584A EP0449148B1 EP 0449148 B1 EP0449148 B1 EP 0449148B1 EP 19910104584 EP19910104584 EP 19910104584 EP 91104584 A EP91104584 A EP 91104584A EP 0449148 B1 EP0449148 B1 EP 0449148B1
Authority
EP
European Patent Office
Prior art keywords
lever
operating
closing
spring
operating device
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
EP19910104584
Other languages
English (en)
French (fr)
Other versions
EP0449148A2 (de
EP0449148A3 (en
Inventor
Leif Höglund
Anders Paulsson
Ulf Akesson
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.)
ABB AB
Original Assignee
Asea Brown Boveri AB
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 Asea Brown Boveri AB filed Critical Asea Brown Boveri AB
Publication of EP0449148A2 publication Critical patent/EP0449148A2/de
Publication of EP0449148A3 publication Critical patent/EP0449148A3/en
Application granted granted Critical
Publication of EP0449148B1 publication Critical patent/EP0449148B1/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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3026—Charging means in which the closing spring charges the opening spring or vice versa
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3042—Power arrangements internal to the switch for operating the driving mechanism using spring motor using a torsion spring

Definitions

  • the invention relates to an operating device for circuit breakers according to the precharacterising part of claim 1.
  • Such an operating device is previously known from EP-A-0 320 614.
  • the operating device according to the invention is primarily intended for SF6-breakers for open outdoor switchgear with a rated voltage of the order of magnitude of 40 kV and higher, but the operating device may advantageously be used also for other types of circuit breakers, for example metal-enclosed circuit breakers insulated with SF6 gas.
  • the EP-A-0 186 171 discloses in operating device which comprises a closing spring which exerts a torque on a driving shaft, as well as an opening spring which exerts a torque on an opening shaft aligned with the driving shaft, the operating shaft being connected to the movable contact of the circuit breaker.
  • the operating device For connection of the shafts for closing of the circuit breaker and simultaneous tensioning of the opening spring, the operating device includes a connection device which comprises a star wheel, fixed to the driving shaft, with at least two arms which are adapted, upon closing of the circuit breaker, to cooperate with a carrier latch mounted on the operating shaft.
  • This latch comprises a relatively large number of movable parts, which means a complication of the design.
  • the EP-A-0 320 614 discloses in operating device of the above-mentioned kind, which also has two different shafts.
  • a driving shaft to which a closing spring and a spring tensioning equipment for the closing spring are connected, is provided for closing the circuit breaker and tensioning the opening spring.
  • an operating shaft to which the circuit breaker and the opening spring are connected.
  • the operating shaft is provided with the lever, at the free end of which is arranged a role. This role is adapted to engage with curved disk fixed on the driving shaft.
  • the curved disk is provided with a peripheral cut-out which defines in angular rotational section of the driving shaft where the engagement between the operating lever and the driving shaft is abolished and the operating lever is free to rotate independently of the driving shaft.
  • the invention aims at to provide an operating device of the above-mentioned kind which is simpler, more reliable, and less space-demanding than comparable prior art designs.
  • the invention suggests an operating device for circuit breakers according to the introductory part of claim 1, which is characterized by the features of the characterizing part of claim 1.
  • the driver lever and operating lever of the operating device are provided with latching members, which during a closing operation are in engagement with each other, and the operating lever is eccentrically journalled in relation to the driving shaft, the latching members during the closing operation thus being displaced relative to each other in such a way that the latching engagement is successively reduced such that, after a certain angle of rotation, the operating lever is disengaged from the driver lever.
  • the operating device according to the invention can be constructed around only one shaft, which provides a simple design with relatively few components. This contributes to increase the reliability of the operating device.
  • the operating device shown in the drawings is intended for high-voltage circuit breakers of, for example, the kind described in Asea Journal 1983, No. 3, pp. 16-21.
  • the operating device comprises a closing spring 1 ( Figure 2) and an opening spring 2 ( Figure 1).
  • the closing spring 1 is of the helically-wound flat bar type and exerts a torque on a driving shaft 3, on which a driver lever 4 is fixedly mounted.
  • the opening spring 2 is arranged in the bottom stand of the circuit breaker, whereas the closing spring 1 and the other parts of the operating device are arranged around the driving shaft 3 in a mechanism housing 10 ( Figures 1 and 6).
  • the driving shaft 3, which constitutes the only main shaft of the operating device, is journalled in an axial trunnion 11 arranged in the mechanism housing, as well as in a bearing 13 supported by a number of supporting arms 12 ( Figure 6).
  • an operating lever 5 is eccentrically journalled in relation to the driving shaft 3.
  • the operating lever 5 is connected to the movable contact 20 of the circuit breaker via an operating rod 21 ( Figure 1) and a link mechanism symbolized by a dot-dashed line 22.
  • the operating lever 5 is rotatable back and forth between two fixed positions, which correspond to the closed and open positions of the circuit breaker.
  • the angle of rotation of the operating lever between the end positions is about 90°.
  • a trip latch 7 is adapted, during normal operation, to keep the breaker contact 20 closed and the opening spring 2 tensioned.
  • a common operating rod 21 may be used for all the poles.
  • the movable contact in each breaker pole is thereby connected to the operating rod via a link mechanism, and the opening spring 2 is suitably arranged close to the remote end of the operating rod 21, as shown in Figure 1.
  • the operating rod will only be subjected to tensile stresses. It may therefore be designed relatively slender and light since it need not be dimensioned for buckling strain.
  • the closing spring 1 has its inner end fixed to the driving shaft 3 and its outer end to a cylindrical drum 15 surrounding the spring and being rotatably mounted on the driving shaft.
  • the spring 1 is tensioned with the aid of a motor 16, which via a worm gear 17 rotates the drum 15.
  • the shaft 3 is thereby maintained locked by a closing latch 6, which hooks up the driver lever 4.
  • the driving motor 16 is supplied with voltage via two series-connected limit switches 18, one of which is controlled by the driving shaft 3 and the other by the drum 15. In case of power failure, the closing spring can be tensioned manually with the aid of a crank 19.
  • the driver lever 4 is formed with two lever parts, one of the lever parts 41 ( Figure 3) cooperating according to the invention with the closing latch 6, the other lever part 42 being provided with a latching projection 43.
  • This latching projection 43 is adapted to cooperate with a corresponding latching projection 53 on the operating lever 5 in order to close the circuit breaker while simultaneously tensioning the opening spring 2.
  • the end portion of the operating lever 5 is provided with a spring-loaded latching flap 52, which is adapted such that the lever 5 may pass freely past the trip latch 7 via the back way.
  • the operating device is provided with a damping device 8 connected to the operating lever 5 ( Figures. 1 and 3) for damping of the opening stroke.
  • the path of action of the damping device may be changed by changing the extent of an oval connection slot 51 in the operating lever.
  • Figure 7a shows the operating device in the normal operating position (corresponding to Figure 3), the breaker contact 20 being closed and both the closing spring 1 and the opening spring 2 being tensioned.
  • the closing spring 1 is maintained tensioned by the closing latch 6, whereas the trip latch 7 maintains the breaker contact 20 closed and the opening spring 2 tensioned.
  • the breaker is ready, upon an opening impulse, to carry out a breaking operation with automatic reclosing after a certain period of time.
  • Figure 7b shows the operating device and the breaker during an opening operation.
  • the opening operation is initiated by energizing the magnet coil of the trip latch 7, whereupon the trip latch is released and the opening spring 2 carries out the contact opening.
  • the movement of the movable contact system is slowed down by the damping device 8.
  • the operating lever 5 is turned clockwise, and its latching projection 53 engages with the latching projection 43 of the driver lever 4 (corresponds to the position according to Fig. 4).
  • the closing spring 1 is still tensioned.
  • FIG. 7c shows the operating device and the breaker during a closing operation. Closing of the breaker is initiated by energizing the magnet coil of the closing latch 6, whereupon the closing latch is released, and the closing spring 1 turns the driving shaft 3 with the driver lever 4 counter-clockwise. The driver lever 4 thereby pulls along with it the eccentrically mounted operating lever 5 counter-clockwise, the breaker contact thus being brought to the closed contact position while at the same time the opening spring 2 is tensioned. At the end of the movement, the operating lever 5 is hooked up by the trip latch 7, and the breaker is ready for renewed opening operation.
  • the operating lever 5 is eccentrically mounted on the driving shaft 3, the latching engagement between the latching projections 43, 53 of the driver lever and the operating lever will be successively reduced during the closing movement, and after a movement of about 90°, the operating lever is disengaged from the driver lever (corresponds to the position according to Figure 1 and Figure 5). Thereafter, the driver lever 4 will continue its rotating movement until the lever part 41 is hooked up by the closing latch 6. During this latter part of the movement of the driver lever, the closing spring 1 arrives at an almost completely non-tensioned state. The driver lever 4 moves 360° in the same direction for each closing of the breaker and each spring tensioning of the closing spring 1.
  • Figure 7d shows the operating device during that part of the operating sequence when the closing spring 1 is tensioned.
  • the breaker is then in the closed position and the opening spring 2 is tensioned.
  • the supply circuit to the motor 16 is closed by the limit switch 18. This causes the motor 16 to start and since the driving shaft 3 with the driver lever 4 is hooked up by the closing latch 6, the closing spring 1 will be tensioned.
  • the limit switch 18 will break the circuit to the motor.
  • the closing spring need not necessarily be a helical spring but the following alternatives are possible:
  • the opening spring which may advantageously also consist of a helical spring wound from a flat rod in the same way as the closing spring shown in the embodiment.
  • the opening spring need not always be separately mounted in spaced relationship to the other components of the operating device, as shown in the embodiment, but in certain cases it may be more suitable for all the parts of the operating device to be arranged close to one another and possibly enclosed within a common mechanism housing.
  • damping device 8 instead of being active upon opening only, this may be designed to be double acting, such that it provides damping both upon closing and upon opening. Damping upon closing may also be provided with a damping device which is influenced by a cam arranged on the driving shaft 3.
  • the movements of the driver lever 4 and the operating lever 5 upon closing and opening, respectively, are not limited to the angles of rotation applicable to the exemplified embodiment, but the operating device may be formed with entirely different angles of rotation, for example 120°, 180° etc.

Landscapes

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

Claims (9)

  1. Betätigungsvorrichtung für einen Schalter mit
    - einem Betätigungshebel (5), der mit einem beweglichen Kontakt (20) des Schalters verbunden ist und der hin- und hergedreht werden kann zwischen zwei festen Stellungen, welche der geschlossenen und geöffneten Stellung des Schalters entsprechen,
    - einer Öffnungsfeder (2),
    - einer Schließfeder (1), welche ein Drehmoment auf eine Antriebswelle (3) ausübt, die nur in einer Richtung drehbar ist,
    - einem auf der Antriebswelle befestigten Antriebshebel (4),
    - einer Spannvorrichtung (16, 17) zum Spannen der Schließfeder,
    - einem Einrastglied (6), um die Schließfeder im gespannten Zustand zu halten,
    - und einen Auslöserastglied (7), um die Öffnungsfeder im gespannten Zustand und die Kontakte des Schalters geschlossen zu halten, wobei der Antriebshebel (4) so beschaffen ist, daß er bei einem Schließvorgang mit dem Betätigungshebel (5) zum Schließen des Schalters verbunden wird, während er gleichzeitig die Öffnungsfeder spannt,
    dadurch gekennzeichnet, daß
    - der Betätigungshebel (5) drehbar und exzentrisch um die Antriebswelle (3) angeordnet ist,
    - daß der Antriebshebel (4) und der Betätigungshebel (5) mit Einrastgliedern (43, 53) versehen ist, die während eines Schließvorganges miteinander in Eingriff stehen,
    - und daß die genannten Einrastglieder (43, 53) während des Schließvorganges sich relativ voneinander derart entfernen, daß die Einrastverriegelung fortschreitend vermindert wird und am Ende des Schließvorganges aufgehoben ist.
  2. Betätigungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Antriebshebel (4) zwei Hebelteile (41, 42) aufweist, von denen der eine (42) das Einrastglied (43) des Hebels trägt, während der andere (41) so beschaffen ist, daß er mit dem Schließ-Einrastglied (6) zusammenwirkt.
  3. Betätigungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die genannten Einrastglieder (43,45) des Antriebshebels (4) und des Betätigungshebels (5) aus einem Einrastvorsprung oder einer Einrastaufnahmefläche an dem entsprechenden Hebel bestehen.
  4. Betätigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schließfeder (1) eine Spiralfeder ist, die aus einem flachen Stab gewickelt ist und um die Antriebswelle (3) herum angeordnet ist.
  5. Betätigungsvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Schließfeder eine Schraubenfeder ist, die um ihre Hauptachse verdreht werden kann.
  6. Betätigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie eine mit dem Betätigungshebel (5) verbundene Dämpfungsvorrichtung (8) zur Dämpfung des Schließvorganges des Schalters hat.
  7. Betätigungsvorrichtung nach einem der vorhergehenden Ansprüche für einen mehrpoligen Hochspannungsschalter, bei welchem der bewegliche Kontakt (20) jedes Schalterpoles über einen Gelenkmechanismus mit einer für alle Pole gemeinsamen Betätigungsstange (21) verbunden ist, dadurch gekennzeichnet, daß das eine Ende der Betätigungsstange mit dem Betätigungshebel (5) verbunden ist und das andere Ende mit der Öffnungsfeder (2).
  8. Betätigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Betätigungsstange (5) um 90° zwischen der geschlossenen und der offenen Stellung des Schalters gedreht werden kann.
  9. Betätigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Antriebshebel (4) so beschaffen ist, daß er sich bei jedem Schließvorgang um 360° dreht.
EP19910104584 1990-03-28 1991-03-23 Betätigungsvorrichtung für Schalter Expired - Lifetime EP0449148B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9001116A SE465902B (sv) 1990-03-28 1990-03-28 Manoeverdon foer stroembrytare
SE9001116 1990-03-28

Publications (3)

Publication Number Publication Date
EP0449148A2 EP0449148A2 (de) 1991-10-02
EP0449148A3 EP0449148A3 (en) 1992-09-02
EP0449148B1 true EP0449148B1 (de) 1995-09-27

Family

ID=20379013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910104584 Expired - Lifetime EP0449148B1 (de) 1990-03-28 1991-03-23 Betätigungsvorrichtung für Schalter

Country Status (3)

Country Link
EP (1) EP0449148B1 (de)
DE (1) DE69113302T2 (de)
SE (1) SE465902B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10061164C1 (de) * 2000-11-30 2002-08-22 Siemens Ag Schalterantrieb
DE102011089369A1 (de) 2011-12-21 2013-06-27 Siemens Aktiengesellschaft Schalterantrieb für einen Leistungsschalter
DE102014215059A1 (de) * 2014-07-31 2016-02-04 Siemens Aktiengesellschaft Federspeicherantrieb sowie Verfahren zur Überwachung eines Federspeicherantriebes
CN107170592B (zh) * 2017-06-27 2023-12-12 广东恒励电气有限公司 一种手动高压合闸装置
CN110729141B (zh) * 2019-10-25 2022-07-01 湖北鄂电萃宇电器有限公司 一种高压柜断路器分合闸操作杆装置及其安装方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE415906A (fr) * 1936-06-06 1936-07-31 Acec Dispositif de commande à distance de disjoncteurs faisant usage de relais à faible consommation
US4343030A (en) * 1978-09-06 1982-08-03 Mcgraw-Edison Company Load break switch
JP2529264B2 (ja) * 1987-06-04 1996-08-28 三菱電機株式会社 ト―ションバ―による操作機構
ES2034111T3 (es) * 1987-12-14 1993-04-01 Sprecher Energie Ag Acumulador de fuerza elastica para un interruptor de alta tension.

Also Published As

Publication number Publication date
EP0449148A2 (de) 1991-10-02
SE9001116L (sv) 1991-09-29
SE9001116D0 (sv) 1990-03-28
SE465902B (sv) 1991-11-11
DE69113302T2 (de) 1996-05-15
DE69113302D1 (de) 1995-11-02
EP0449148A3 (en) 1992-09-02

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