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EP2075817A1 - Betätigungsübertragungssystem für elektrische Vorrichtungen - Google Patents

Betätigungsübertragungssystem für elektrische Vorrichtungen Download PDF

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Publication number
EP2075817A1
EP2075817A1 EP07380394A EP07380394A EP2075817A1 EP 2075817 A1 EP2075817 A1 EP 2075817A1 EP 07380394 A EP07380394 A EP 07380394A EP 07380394 A EP07380394 A EP 07380394A EP 2075817 A1 EP2075817 A1 EP 2075817A1
Authority
EP
European Patent Office
Prior art keywords
retaining means
transmission system
electrical equipment
equipment according
switch
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.)
Withdrawn
Application number
EP07380394A
Other languages
English (en)
French (fr)
Inventor
Juan María Casado Cartón
Asier Arteche Menchaca
José Manuel Inchausti Sancho
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.)
Ormazabal y Cia SL
Original Assignee
Ormazabal y Cia SL
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 Ormazabal y Cia SL filed Critical Ormazabal y Cia SL
Priority to EP07380394A priority Critical patent/EP2075817A1/de
Publication of EP2075817A1 publication Critical patent/EP2075817A1/de
Withdrawn legal-status Critical Current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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • 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

Definitions

  • the present invention relates to an actuation transmission system for electrical equipment, and specifically, to the application of short-circuit switches and automatic circuit breakers with three switching functions (power cut/connection, isolating and grounding), which comprises a compression sub-assembly provided with a plurality of elastic and retaining components that guarantee the joining of the moving contact with the fixed contact or with the grounding contact of the circuit-breaker even in surge current or short circuit conditions, such as the insulation between two parts of the circuit when the switch is in the power cut position or in the isolating position.
  • the switchgear used in power grids comprises switching components that fulfil the installation functions of power cut/connection, isolating and grounding. In this way where there are cases such as a fault in the distribution line, a power cut due to repairs, maintenance or optimization in the distribution of the electric load, said switching components can be actuated to obtain the desired power distribution, preventing the consumers from being left without voltage and guaranteeing the protection of people and electrical equipment such as, for example, transformers.
  • These switching components can consist of automatic circuit breakers or short-circuit switches, provided with a moving contact and a fixed contact, including a grounding contact in these three-position switching components (power cut/connection - isolating - grounding).
  • the moving contact of the switch transmits thereto an actuation force produced by a switching mechanism, frequently called a control.
  • the actuation of the switching mechanism can be either voluntary, ordered by an operator independent from the value of the current, or due to the action of a device sensitive to certain values of current that directly or indirectly order the opening of the circuit.
  • the transfer of the actuation force between the switching mechanism and the moving contact of the switch is carried out through a transmission system inserted therebetween.
  • the coupling between the actuation transmission system and the switching mechanism can consist of a rigid coupling or a non-rigid coupling.
  • This actuation transmission system can consist of a linear system, i.e. the transfer of the actuation force arises over a single axis, or can consist of a non-linear system, i.e. that the switching mechanism and the switch are mounted on different axes and therefore the conversion of the movement emitted by the switching mechanism before transmitting it to the moving contact of the switch is necessary, such as, for example, the conversion of a horizontal movement to one of vertical movement.
  • the actuation transmission system is a longitudinal bar that directly transmits the movement from the switching mechanism to the moving contact of the switch. Therefore, it is a rigid transmission, wherein the movement is transferred without any damping or system that produces the balancing of force. In this way, the use of this kind of transmission system involves the risk that the transmitted movement could exert a pressure between the contacts of the switch which could entail the deterioration or destruction thereof.
  • patent application WO 02082606 and European patent EP 0393733 defines solutions wherein the transmission system used is rigid.
  • the switch In the power cut or isolating position, the switch must maintain or support the insulatation between the two parts of the circuit, while in the connection position, the switch must conduct nominal currents in a permanent way, such as endure certain accidental or abnormal situations, which could be surge currents or short-circuits, for a period of time. Likewise, the switch in the grounding position must be capable of maintaining said position in short-circuit situations.
  • the time of the power cut is fundamental, given that from the time of the contact situation step until the final separation, the contacts pass through a range of distances wherein the electric arc could be produced, for which reason said step has to be as fast as possible, i.e. the time of the power cut be minimal, with the objective of minimizing said risk.
  • the switches must be designed in such a way that they can not abandon their switching positions because of gravity, vibrations or because of the action of electrodynamic forces caused by short-circuit. Therefore, these specified phenomena must not reduce the safety of the functioning or aptitude of the switch to bear the current. In this sense, in the examples of the patents previously mentioned the joining between the contacts of the switch is not guaranteed, nor is the maintenance of the power cut or isolating position guaranteed when there is one of the aforementioned phenomena.
  • the present invention relates to an actuation transmission system for electrical equipment, such as, for example, switching components that may consist of automatic circuit breakers or short-circuit switches with three switching positions; a first power cut/connection position, a second isolating position and a third grounding position.
  • Said actuation transmission system can be configured as a linear system, for which the transfer of the actuation force produced by the switching mechanism is carried out on the same axial axis whereupon said switching mechanism and the switch is mounted, thereby avoiding the necessity of making movement conversion before transmitting them to the moving contact of the switch.
  • Said actuation transmission system comprises a compression sub-assembly that guarantees the joining of the moving contact with the fixed contact in the connection position or with the grounding contact in the grounding position of the switch in either surge current or short-circuit conditions, a situation wherein the electrodynamic forces, produced by the intensity of the current and the magnetic field created, tend to separate the contacts.
  • the compression sub-assembly guarantees the separation between the contacts in the isolating position of the switch, maintaining the insulation between two parts of the circuit without the formation of an electric arc being possible.
  • the actuation transmission system is situated between the switching mechanism and the three-position switch, which is provided with a moving contact, a fixed contact and a grounding contact, the connecting component between the switch and the actuation transmission system being a transmission bar that forms part of said actuation system.
  • this can consist of a rigid coupling or, on the contrary, a non-rigid coupling.
  • One part of the transmission bar is integrated within the compression sub-assembly and moves axially therethrough, this movement being due to the actuation force produced by the switching mechanism for the execution of the position change of the switching operation.
  • the compression sub-assembly comprises at least one inner elastic component, such as, for example, a compression spring, and retaining means of said, at least one, inner elastic component.
  • Said retaining means can be divided into first retaining means and second retaining means. These retaining means can be disposed in form of shields or washers.
  • the first retaining means can be supported about an inner peripheral protuberance that can comprise a unidirectional bushing body wherein is inserted part of the transmission bar.
  • the second retaining means can be situated closing the open ends of said unidirectional bushing body.
  • the inner elastic components can be compressed by a peripheral protuberance of the transmission bar, situated between the first retaining means that rest on the aforementioned protuberance and the second retaining means that close the open ends of the body.
  • One of these second retaining means, through a hollow, allows for the insertion of the transmission bar to the compression sub-assembly.
  • the compression sub-assembly on the outside of the unidirectional bushing body, comprises outer elastic components, and third and fourth retaining means.
  • the third and fourth retaining means could be configured to retain the outer elastic components.
  • the outer elastic components could consist of compression springs.
  • the third retaining means could be shields or washers, while the fourth retaining means could be shields.
  • the unidirectional bushing body could comprise an exterior peripheral protuberance whereupon the third retaining means are supported, outside of the bushing body, and the fourth retaining means could be disposed at each end of the body. Therefore, the outer elastic components could be compressed between the third and fourth retaining means.
  • the compression sub-assembly comprises a cylindrical bushing liner that covers all of the components that form said sub-assembly, this liner being disposed between the complementary fourth retaining means which compress the outer elastic components.
  • a steady bearing is disposed around the exterior protuberance of the body, limiting the movement of the outer elastic components.
  • the actuation force produced by the switching mechanism causes the assembly of components formed by the unidirectional bushing body, the inner elastic components and the outer elastic components, to move.
  • the movement of this assembly of components entails the movement of the transmission bar and, in turn, the movement of the moving contact of the switch, obtaining the joining between the moving contact and fixed contact as a result.
  • This joining is carried out in a damped fashion, since when the moving contact comes up against the fixed contact, the transmission bar can not continue moving, so the remaining part of the movement produces the compression of an inner elastic component, this compression being caused by the pressure exerted by the transmission bar, by means of a peripheral protuberance that this disposes, about a first retaining means, thereby damping the connection between the switch contacts and preventing any deterioration thereof due to a violent joining.
  • the compression of the inner elastic component guarantees the maintenance of the connection between the fixed contact and the moving contact, even bearing certain accidental or abnormal situations, such as surge currents or short-circuits, for a while.
  • the inner elastic component of the compression sub-assembly compressed in the connection operation, returns to its decompression state, and once the circuit is opened, these inner elastic components that are disposed decompressed, guarantee the separation between the fixed contact and the moving contact of the switch, maintaining the insulation between the two parts of the circuit.
  • the actuation force produced by the switching mechanism causes the sub-assembly of components formed by the unidirectional bushing body, the inner elastic components and the first retaining means, to move.
  • the movement of this assembly of components entails the movement of the transmission bar and, in turn, the movement of the moving contact of the switch, obtaining the joining between the moving contact and grounding contact of the switch as a result.
  • This joining is carried out in a damped fashion, since when the moving contact comes up against the grounding contact the transmission bar can not continue moving, so the remaining part of the movement produces the compression of an inner elastic component, this compression being caused by the pressure exerted by the transmission bar, by means of a peripheral protuberance that this disposes, above a first retaining means, specifically the first retaining means opposite the one that acts in the connection operation, thereby damping the connection between the switch contacts and preventing any deterioration thereof due to a violent joining.
  • the compression of the inner elastic component guarantees the maintenance of the connection between the grounding contact and the moving contact, even in short-circuit situations.
  • the compression sub-assembly can also comprise outer elastic components and their respective retaining means, these being the third and fourth retaining means, so that during a connection operation or a grounding operation, in addition to the compression of one of the inner elastic components, the compression of an outer elastic component is produced due to the movement of the unidirectional bushing body, since the exterior peripheral protuberance of said body exerts a pressure on said third retaining body. Consequently, during a power cut or isolating operation of the switch, the compressed outer elastic component, by means of decompression thereof collaborates in the separation between the moving contact and the fixed contact or in the separation between the moving contact and the grounding contact of the switch.
  • these outer elastic components allow the assembly formed by the unidirectional bushing body, the inner elastic means and the first and second retaining means, to remain secured in their position without risk of fluctuation.
  • the device relates to an actuation transmission system (24) for electrical equipment, such as, for example, an automatic circuit-breaker or a short-circuit switch, with the possibility of this system (24) configured as a linear system, wherein the transfer of the actuation force produced by the switching mechanism (23) which is carried out above the same axial axes whereupon said switching mechanism (23) and the switch (2) are mounted.
  • an actuation transmission system (24) for electrical equipment such as, for example, an automatic circuit-breaker or a short-circuit switch
  • this actuation transmission system (24) comprises a compression sub-assembly (1) that is joined by a transmission bar (3) to the moving contact (26) of a switch (2), whether an automatic circuit-breaker or a short-circuit breaker, in either of the cases being a three-position switch (2), a first power cut/connection position, a second isolating position and a third grounding position, so the switch (2) comprises a fixed contact (27), a moving contact (26) and a grounding contact (25).
  • the actuation transmission system (24) and the switching mechanism (23) can be coupled in a rigid fashion or, on the contrary, by means of a non-rigid coupling.
  • the compression sub-assembly (1) comprises a unidirectional bushing body (4) that, in turn, is provided with inner springs (5, 6), first retaining means (7, 8) and second retaining means (9, 10) of said springs (5, 6); the first spring (5) is disposed between a first retaining means (7) and a first second retaining means (9) and the second spring (6) between a second first retaining means (8) and a second retaining means (19).
  • the first retaining means (7, 8) can be disposed in the form of washers or shields, while the second retaining means (9, 10) close off the open ends of the body (4) and therefore are disposed in the form of shields.
  • the body (4) comprises an inner peripheral protuberance (17) wherein the first retaining means (7, 8) can be supported. These first retaining means (7, 8), in turn, can be lean on a peripheral protuberance (19) that comprises the transmission bar (3).
  • the transmission bar (3) forms part of the actuation transmission system (24), and as can be observed in figures 2-4 , part of this bar (3) is incorporated within the interior of the compression sub-assembly (1) through a hollow (18) established in the first second retaining means (9), so that this transmission bar (3) can move axially through the interior of the compression sub-assembly (1) due to the actuation force produced by the switching mechanism (23) for the execution of the position change of the operation of the switch (2).
  • the actuation force produced by the switching mechanism (23) causes the movement of the assembly of components formed by the unidirectional bushing body (4), the inner springs (5, 6) and the first and second retaining means (7, 8, 9, 10).
  • the movement of this assembly of components entails the movement of the moving contact (26) of the switch (2), obtaining as a result the joining between the moving contact (26) and the fixed contact (27).
  • the second spring (6) of the compression sub-assembly (1) compressed in the connection operation, returns to its decompression state, as shown in figure 3 , and once the circuit is opened, the springs (5, 6) which are decompressed, guarantee the separation between the fixed contact (27) and the moving contact (26) of the switch (2), maintaining the insulation between both parts of the circuit.
  • the actuation force produced by the switching mechanism (23) causes the assembly of components formed by the unidirectional bushing body (4), the inner springs (5, 6) and the first and second retaining means (7, 8, 9, 10). Therefore, the movement of this assembly of components entails the movement of the transmission bar (3) and, in turn, the movement of the moving contact (26) of the switch (2), obtaining the joining between the moving contact (26) and the grounding contact (25) of the switch (2) as a result.
  • the compression sub-assembly (1) comprises outer springs (11, 12), that are disposed at each end of the unidirectional bushing body (4) and around thereof, is considered, these possibly being able to consist of compression springs.
  • the unidirectional bushing body (4) comprises an outer peripheral protuberance (20) whereupon third retaining means (14, 15) can be supported outside of the bushing body (4), as well as complementary fourth retaining means (13, 16) disposed on each one of the ends of the body (4) and around the second retaining means (9, 10), which close the open ends of the unidirectional bushing body (4), in a way that the first outer spring (14) and a first fourth retaining means (13) and the second outer spring (12) can be compressed between a second third retaining means (15) and a second fourth retaining means (16).
  • these outer springs (11, 12) allow the assembly formed by the unidirectional bushing body (4), the inner springs (5, 6) and the first and second retaining means (7, 8, 9, 10), to remain secured in their position without risk of fluctuation.
  • the isolating position, shown in figure 6 is equally stable due to the joint action of the outer springs (11, 12), the inner springs (5, 6), the first and second retaining means (7, 8, 9, 10) and the third and fourth retaining means (14, 15, 13, 16).
  • the compression sub-assembly (1) comprises a cylindrical bushing liner (22) which covers all of the components that form said sub-assembly (1), this liner (22) being disposed between the fourth retaining means (13, 16).
  • a steady bearing (21) is disposed around the exterior protuberance (20) of the body (4), limiting the movement of the outer springs (11, 12).

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP07380394A 2007-12-27 2007-12-27 Betätigungsübertragungssystem für elektrische Vorrichtungen Withdrawn EP2075817A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07380394A EP2075817A1 (de) 2007-12-27 2007-12-27 Betätigungsübertragungssystem für elektrische Vorrichtungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07380394A EP2075817A1 (de) 2007-12-27 2007-12-27 Betätigungsübertragungssystem für elektrische Vorrichtungen

Publications (1)

Publication Number Publication Date
EP2075817A1 true EP2075817A1 (de) 2009-07-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07380394A Withdrawn EP2075817A1 (de) 2007-12-27 2007-12-27 Betätigungsübertragungssystem für elektrische Vorrichtungen

Country Status (1)

Country Link
EP (1) EP2075817A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101807488A (zh) * 2010-04-21 2010-08-18 山东晨鸿电气有限公司 真空灭弧室的三工位装置
CN102024606A (zh) * 2010-12-16 2011-04-20 上海思源高压开关有限公司 三工位隔离接地开关
CN108010758A (zh) * 2017-12-25 2018-05-08 上海电气集团股份有限公司 一种带锁扣的斥力机构用绝缘拉杆装置
WO2019022659A1 (en) * 2017-07-24 2019-01-31 Scibreak Ab BREAKER

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3522404A (en) * 1967-11-22 1970-08-04 Frank C Trayer Totally enclosed component
US4225763A (en) * 1978-03-23 1980-09-30 General Electric Company Means for suppressing contact-separation at the end of a vacuum circuit-breaker closing operation
EP0393733A1 (de) 1989-03-22 1990-10-24 Holec Systemen En Componenten B.V. Ein- oder Mehrphasen-Mittelspannungs-Schaltgerät und damit aufgebaute Verteilungsinstallation
US5055640A (en) 1989-03-16 1991-10-08 Sprecher Energie Ag Multi-pin vacuum switch arrangement
EP1022761A2 (de) * 1999-01-25 2000-07-26 Hitachi, Ltd. Vakuumschaltgerät
US20020067230A1 (en) 2000-12-04 2002-06-06 Yoon Seok Jung Vacuum circuit breaker
WO2002082606A1 (en) 2001-04-09 2002-10-17 Holec Holland N.V. Single phase or polyphase switchgear in an enveloping housing

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3522404A (en) * 1967-11-22 1970-08-04 Frank C Trayer Totally enclosed component
US4225763A (en) * 1978-03-23 1980-09-30 General Electric Company Means for suppressing contact-separation at the end of a vacuum circuit-breaker closing operation
US5055640A (en) 1989-03-16 1991-10-08 Sprecher Energie Ag Multi-pin vacuum switch arrangement
EP0393733A1 (de) 1989-03-22 1990-10-24 Holec Systemen En Componenten B.V. Ein- oder Mehrphasen-Mittelspannungs-Schaltgerät und damit aufgebaute Verteilungsinstallation
EP1022761A2 (de) * 1999-01-25 2000-07-26 Hitachi, Ltd. Vakuumschaltgerät
US20020067230A1 (en) 2000-12-04 2002-06-06 Yoon Seok Jung Vacuum circuit breaker
WO2002082606A1 (en) 2001-04-09 2002-10-17 Holec Holland N.V. Single phase or polyphase switchgear in an enveloping housing

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101807488A (zh) * 2010-04-21 2010-08-18 山东晨鸿电气有限公司 真空灭弧室的三工位装置
CN102024606A (zh) * 2010-12-16 2011-04-20 上海思源高压开关有限公司 三工位隔离接地开关
CN102024606B (zh) * 2010-12-16 2013-10-30 上海思源高压开关有限公司 三工位隔离接地开关
WO2019022659A1 (en) * 2017-07-24 2019-01-31 Scibreak Ab BREAKER
CN110998774A (zh) * 2017-07-24 2020-04-10 斯基布瑞克股份公司 断路器
CN110998774B (zh) * 2017-07-24 2022-02-11 斯基布瑞克股份公司 断路器
US11289295B2 (en) 2017-07-24 2022-03-29 Scibreak Ab Circuit breaker
CN108010758A (zh) * 2017-12-25 2018-05-08 上海电气集团股份有限公司 一种带锁扣的斥力机构用绝缘拉杆装置
CN108010758B (zh) * 2017-12-25 2019-09-03 上海电气集团股份有限公司 一种带锁扣的斥力机构用绝缘拉杆装置

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