EP0159960B1 - Vakuumschaltgerät mit einer Antriebsvorrichtung sowie mit einer an dem beweglichen Anschlussbolzen der Schaltröhre abgestützten Feder - Google Patents

Vakuumschaltgerät mit einer Antriebsvorrichtung sowie mit einer an dem beweglichen Anschlussbolzen der Schaltröhre abgestützten Feder Download PDF

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Publication number
EP0159960B1
EP0159960B1 EP85730051A EP85730051A EP0159960B1 EP 0159960 B1 EP0159960 B1 EP 0159960B1 EP 85730051 A EP85730051 A EP 85730051A EP 85730051 A EP85730051 A EP 85730051A EP 0159960 B1 EP0159960 B1 EP 0159960B1
Authority
EP
European Patent Office
Prior art keywords
spring
extension piece
stop
drive lever
switching
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
Application number
EP85730051A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0159960A1 (de
Inventor
Norbert Dipl.-Ing. Steinemer (Fh)
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0159960A1 publication Critical patent/EP0159960A1/de
Application granted granted Critical
Publication of EP0159960B1 publication Critical patent/EP0159960B1/de
Expired legal-status Critical Current

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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
    • 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
    • H01H2033/6665—Details concerning the mounting or supporting of the individual vacuum bottles
    • 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
    • H01H2033/6667—Details concerning lever type driving rod arrangements
    • 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
    • H01H33/02—Details
    • H01H33/022—Details particular to three-phase circuit breakers

Definitions

  • the invention relates to a vacuum switching device with a drive device for switching on and off at least one vacuum interrupter, and with a spring supported at one end on the movable connecting bolt of the interrupter, which is connected at its other end to a drive lever of the drive device which can be pivoted about a rotary bearing. the relative movement between the connecting bolt and the drive lever in the switch-off direction is limited by a stop.
  • a vacuum switching device of this type has become known, for example, from US Pat. No. 4,099,039.
  • the spring acting on the connecting bolt of the vacuum interrupter serves here as a contact force spring.
  • the drive device applies all the forces required to move all of the elements involved in the shading process and overcomes the biasing force of the contact force spring in order to generate the required contact force between the interacting contact pieces of the switching tube. In this state, the drive device is latched.
  • a separate switch-off force accumulator is discharged, the contact force spring supporting the switch-off process until the contact pieces are electrically isolated.
  • a three-pole switching device has at least five springs, namely a closing spring, a closing spring and three contact force springs.
  • the closing spring and the closing spring are generally located in a drive box, while the contact force springs are arranged in the vicinity of each switching tube or in the course of the drive rod belonging to each switching tube.
  • the invention has for its object to reduce the effort for the extensive spring arrangement described and at the same time to improve the operation of the switch.
  • this object is achieved in a vacuum secondary device of the type mentioned in that the stop is connected to the connecting bolt and that the spring and the stop on the drive lever attack with respect to its pivot bearing with different long lever arms, the lever arm of the spring being so larger is dimensioned as the lever arm of the stop that the connection bolt is acted upon in the off position with at least one opening force which cancels the switch-on force caused by the surrounding air pressure.
  • the spring takes on both the function of a contact force spring and an opening spring.
  • the switch-off spring that was previously required and common to several switching tubes can therefore be dispensed with. This leads to a simplification and downsizing of the drive box.
  • Another advantageous property of the new spring arrangement is that the change of load direction that always occurs in the previous drive devices between each switching tube and the drive is eliminated because the drive linkage is always loaded in the same direction and therefore tolerances on bearings and joints cannot have a dead gear . In this way, an area of indifferent contact contact is eliminated in which the contact pieces are in contact with one another without contact force and can therefore weld to one another.
  • the invention can advantageously be implemented in such a way that the drive lever has a length that extends beyond the stop attached to the extension piece and on its end is provided with an abutment for the spring designed as a tension spring or compression spring, for the other end of which an abutment is arranged at the free end of the extension piece.
  • new parts are not required in principle, but only a new design of existing parts.
  • the drive lever has a leg which extends approximately transversely to the extension piece and cooperates with the stop attached to the extension piece, and also has a leg which extends approximately transversely to the extension piece and extends over the extension piece extends and forms an abutment of the spring designed as a compression spring, while the other abutment is arranged at the free end of the extension piece.
  • the invention can thus advantageously be carried out both with a compression spring or with a tension spring. It depends on the required characteristics of the spring, the space available and similar practical considerations, which type of spring is cheaper.
  • FIGS. 6 and 7 Two further embodiments of a switching tube drive with compression springs instead of tension springs are shown in FIGS. 6 and 7.
  • the vacuum switching device 1 shown in FIG. 1 is a three-pole circuit breaker for the medium-voltage range with three switching tubes 2 arranged parallel to one another. These are each arranged between a head piece 3 and a drive base 4, which are fastened to mounting rails 6 by means of the same support insulators 5, which are connected in parallel are attached to each other on a drive box 7.
  • the drive base 4 assigned to each switching tube 2 contains a drive arrangement to be described in more detail with reference to FIGS. 3 to 5, which is connected by a coupling rod 10 to the drive parts located in the drive box 7 and common to all three poles of the switching device 1.
  • a switching tube 15 is shown schematically in section in FIGS. 3, 4 and 5.
  • the switching tube 15 has a fixed Schlat consultancy 16 with a connecting bolt 17, which is clamped in a manner not shown, for example by means of a head piece 3 shown in FIGS. 1 and 2.
  • a movable switching element 18 cooperates, the connecting bolt 20 is led out in a known manner vacuum-tight from the housing of the switching tube 15 by means of a bellows 21.
  • An extension piece 22 is connected to the connecting bolt 20 and extends essentially in the longitudinal direction of the switching piece arrangement of the switching tube 15.
  • a drive lever 24 formed by a bolt 23, on one leg 25 of which a coupling rod 26 articulates, which corresponds to the coupling rod 10 in FIGS. 1 and 2 and how this serves to transmit the starting force.
  • Another, approximately perpendicular to the leg 25 leg 27 of the drive lever 24 extends to the opposite side of the longitudinal axis of the extension piece 22 and is formed at its end as an abutment of a tension spring 30.
  • the opposite end of this tension spring engages an angled portion 31 of the extension piece 22, which also extends to the side of the longitudinal axis of the extension piece 22 opposite the bearing pin 23.
  • the extension piece 22 is provided with a stop 32 designed as a bolt for the lever arm 27 of the drive lever 24.
  • FIG. 3 shows the arrangement in the switched-on state. This is brought about by the fact that the coupling rod 26 is moved in the direction of arrow 33 by means of the drive device (not shown) and the drive lever 24 is pivoted clockwise about the bolt 23.
  • the tension spring 30 is thereby tensioned and transmits its tensile force via the extension piece 22 to the movable connecting bolt 20.
  • the leg 27 of the drive lever 24 is raised from the stop 32 in the switched-on state.
  • the tension spring 30 determines the contact force occurring between the contact pieces 16 and 18.
  • the coupling rod 26 is latched in the switched-on position by a mechanism which is common in switching devices and is therefore not shown.
  • the ratio of the effective lever arms a and b, which are entered in FIG. 5, is decisive for the occurrence of the switch-off movement.
  • the lever arm of the leg 27 of the drive lever 24 is designated with respect to the stop 32, while with b the lever arm of the leg 27 is referred to with respect to the abutment of the tension spring 30.
  • F denotes the force of the tension spring 30 in the switch-off position shown.
  • it causes an extension of the extension piece 22 by the contact of the leg 27 of the drive lever 24 with the stop 32 to produce a force F1 in the sense of switching off, which corresponds to the spring force F increased by the ratio of the lever arms b / a.
  • This opening force is reduced by the force F2, which is equal to the spring force F.
  • a suitable choice of the spring force F and the lever arms a and b can achieve that the force F1 is sufficiently greater than the force F2 to overcome the closing force caused by the surrounding air pressure.
  • the spring 30 thus serves both as a contact force spring and as a switch-off spring and replaces the previously common switch-off spring that is common to several poles of a switching device.
  • the lever ratio b / a is not or not yet effective, since here the leg 27 is not yet in contact with the stop 32 or no power is transmitted yet.
  • the contact force is approximately equal to the force of the tensioned tension spring 30, while in FIG. 4 the contact force also corresponds to the spring force, which, however, is also reduced due to the reduced tension of the tension spring 30.
  • FIG. 6 shows another embodiment in which a compression spring 35 is provided instead of the tension spring shown in FIGS. 3 to 5. This is supported with one end as well as the tension spring 30 on a bend 36 of a differently shaped extension piece 37.
  • the opposite end of the compression spring 35 rests on an additional leg 40 of an A drive lever 41, the rotary bearing 45 of which is arranged in the same way as that of the drive lever 24 in FIGS. 3 to 5 and is thus approximately at the point of contact of legs 42 and 43.
  • the upper leg 42 of the drive lever 41 is only so long that it can come into contact with the stop 44 of the extension piece 37.
  • the exemplary embodiment according to FIG. 7 is based on the use of a compression spring 35 according to FIG. 6 and a drive lever 24 according to FIGS. 3 to 5.
  • the extension piece 50 is designed differently, which, as in FIG. 6, already carries a development 53 just below the stop 51 on the side of the longitudinal axis of the connecting bolt 20 facing away from the rotary bearing 23 of the drive lever 24.
  • the compression spring 35 is supported, according to the example according to FIG. 6, with one end on the development 53, but with its other end on a spring plate 54 which is articulated at the lower end of a pull rod articulated at the end of the leg 27 of the drive lever 24 55 is located.
  • the mode of operation of this arrangement corresponds to the previously explained exemplary embodiments on the basis of the lever arms a and b likewise entered in FIG. 7.
  • both the contact force and the breaking force are generated by a tension or compression spring on each switching tube.
  • the lever arrangement described works without a change of load direction and thus without any dead gear in the drive, so that an area of indifferent contact contact in which the contact force with the risk of welding is almost zero , practically does not occur.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP85730051A 1984-04-12 1985-04-02 Vakuumschaltgerät mit einer Antriebsvorrichtung sowie mit einer an dem beweglichen Anschlussbolzen der Schaltröhre abgestützten Feder Expired EP0159960B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843414016 DE3414016A1 (de) 1984-04-12 1984-04-12 Vakuumschaltgeraet mit einer antriebsvorrichtung sowie mit einer an dem beweglichen anschlussbolzen der schaltroehre abgestuetzten feder
DE3414016 1984-04-12

Publications (2)

Publication Number Publication Date
EP0159960A1 EP0159960A1 (de) 1985-10-30
EP0159960B1 true EP0159960B1 (de) 1987-10-14

Family

ID=6233526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730051A Expired EP0159960B1 (de) 1984-04-12 1985-04-02 Vakuumschaltgerät mit einer Antriebsvorrichtung sowie mit einer an dem beweglichen Anschlussbolzen der Schaltröhre abgestützten Feder

Country Status (4)

Country Link
US (1) US4593165A (sv)
EP (1) EP0159960B1 (sv)
JP (1) JPS60230328A (sv)
DE (2) DE3414016A1 (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915522A1 (de) * 1989-05-11 1990-11-15 Siemens Ag Antriebsvorrichtung fuer eine vakuumschaltroehre mit einer kontaktfeder

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0172986B1 (de) * 1984-08-31 1990-12-27 Sprecher Energie AG Antriebsvorrichtung für einen elektrischen Schalter mit Druckkontakten, insbesondere für einen Vakuumschalter
US4855546A (en) * 1987-03-17 1989-08-08 Leisch Lee J Vacuum operated circuit breaker
JPH0479117A (ja) * 1990-07-19 1992-03-12 Fuji Electric Co Ltd ガス絶縁開閉装置
DE4133092A1 (de) * 1991-09-30 1993-04-01 Siemens Ag Mehrpoliger vakuumschalter mit einer polantriebseinheit fuer jede vakuumschaltroehre
DE4210714A1 (de) * 1992-03-27 1993-09-30 Siemens Ag Vakuumschalter mit einer Stromschleifenanordnung
DE4210716A1 (de) * 1992-03-27 1993-09-30 Siemens Ag Mehrpoliger Vakuumschalter mit einer jede Vakuumröhre umgebenden Isolieranordnung
DE4211155A1 (de) * 1992-03-31 1993-10-07 Siemens Ag Gasisolierte Schaltanlage mit einem mehrpoligen Vakuumschalter und einem mehrpoligen Lasttrennschalter
JPH06215672A (ja) * 1993-01-20 1994-08-05 Toshiba Corp 真空遮断器
FR2725303B1 (fr) * 1994-09-29 1996-10-31 Schneider Electric Sa Interrupteur ou disjoncteur moyenne tension
SE9500293D0 (sv) * 1995-01-26 1995-01-26 Asea Brown Boveri Ställverk med manöverdon för brytare
DE19808083C1 (de) * 1998-02-20 1999-04-29 Siemens Ag Vakuumschalter
NZ337089A (en) * 1999-08-06 2002-04-26 Qei Inc Air break switch actuator comprising operating means manually operable and/or driven by a linear drive unit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1126362A (en) * 1965-07-06 1968-09-05 Ass Elect Ind Improvements in and relating to electric circuit breakers
US3562457A (en) * 1967-11-14 1971-02-09 Allis Chalmers Mfg Co Combined vacuum circuit breaker and current transformer device
US3471669A (en) * 1968-01-16 1969-10-07 Chance Co Ab Encapsulated switch assembly for underground electric distribution service
US3582587A (en) * 1969-02-03 1971-06-01 Gen Electric Vacuum-type circuit interrupter having a stroke length dependent upon current magnitude
US4099039A (en) * 1976-12-20 1978-07-04 General Electric Company Means for effectively controlling the forces imposed on the movable contact of a vacuum-type circuit interrupter
US4323871A (en) * 1980-03-21 1982-04-06 A. B. Chance Company Circuit protecting apparatus including resettable vacuum fuse and switch
DE3020800C2 (de) * 1980-05-31 1983-10-20 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Vakuum-Leistungsschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915522A1 (de) * 1989-05-11 1990-11-15 Siemens Ag Antriebsvorrichtung fuer eine vakuumschaltroehre mit einer kontaktfeder

Also Published As

Publication number Publication date
US4593165A (en) 1986-06-03
DE3560779D1 (en) 1987-11-19
JPH0219569B2 (sv) 1990-05-02
DE3414016A1 (de) 1985-10-17
EP0159960A1 (de) 1985-10-30
JPS60230328A (ja) 1985-11-15

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