EP1005058B1 - Vakuumschaltgerät - Google Patents

Vakuumschaltgerät Download PDF

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Publication number
EP1005058B1
EP1005058B1 EP99123233A EP99123233A EP1005058B1 EP 1005058 B1 EP1005058 B1 EP 1005058B1 EP 99123233 A EP99123233 A EP 99123233A EP 99123233 A EP99123233 A EP 99123233A EP 1005058 B1 EP1005058 B1 EP 1005058B1
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EP
European Patent Office
Prior art keywords
movable
mechanism section
section
isolation
insulation
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
EP99123233A
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English (en)
French (fr)
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EP1005058A3 (de
EP1005058A2 (de
Inventor
Tetsu Toshiba Kabushiki Kaisha Shioiri
Toshiharu Toshiba Kabushiki Kaisha Yamazaki
Shin Toshiba Kabushiki Kaisha Murakami
Kunio Toshiba Kabushiki Kaisha Yokokura
Junichi Toshiba Kabushiki Kaisha Sato
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Toshiba Corp
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Toshiba Corp
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Publication of EP1005058A2 publication Critical patent/EP1005058A2/de
Publication of EP1005058A3 publication Critical patent/EP1005058A3/de
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Publication of EP1005058B1 publication Critical patent/EP1005058B1/de
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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
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • H01H2033/566—Avoiding the use of SF6
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66269—Details relating to the materials used for screens in vacuum switches
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66276—Details relating to the mounting of screens in vacuum switches
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66284—Details relating to the electrical field properties of screens in vacuum switches
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66292—Details relating to the use of multiple screens in vacuum 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
    • H01H31/003—Earthing switches
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • 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
    • H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators

Definitions

  • the present invention relates to a vacuum switchgear which uses SF 6 gas as an insulation medium, especially, relates to a vacuum switchgear which controls use amount of the insulation medium such as SF 6 gas and harmonizes with the environment.
  • Document US 4 020 304 discloses a devices according to the preamble of claims 1 and 2.
  • each electric equipment is covered by a pipe-shaped metallic container, SF 6 gas of the high pressure is enclosed as an insulation medium to be miniaturized and sealed up.
  • C-GIS is switchgear developed to correspond to requests of higher reliability, safety, and simplifying maintenance than GIS, and, at the same time, capable of constructing it on a narrow site in a short term, and making the harmony with the environment with surroundings.
  • This C-GIS stores each electric equipment in the lump in the container of the cubicle-type in which the low-pressure insulation gas near the atmospheric pressure is used, and the inside thereof is divided into the configuration units, and has same aspect as other close switchboards.
  • FIG. 1 is a vertical sectional view which shows an example of the configuration of this kind of typical cubicle-type gas insulation switchgear.
  • box 1 SF 6 gas 2 is sealed up in box 1 whose circumference is surrounded to airtight by the mild steel plate. Box 1 is gas-divided into receipt room 1a, breaker room 1b, and generatrix room 1c.
  • cable head 3 is provided to the side in box 1.
  • Arrestor 4 and detection insulator 5 stored in receipt room 1a are connected via connection conductor 7.
  • the power cable which penetrates through current transformer 8 is connected with cable 9.
  • Breaker room 1b stores breaker 11 which stores the vacuum interrupter (not shown in the figure) through insulation spacer 10a in the lower stage gas-divided from receipt room 1a.
  • This breaker 11 is connected with insulation spacer 10b in the upper stage gas-divided from generatrix room 1c through connection conductor 7.
  • a high vacuum is used as insulation and arc-quenching medium for breaker 11.
  • SF 6 gas is used as insulation and arc-quenching medium for isolation machine 6.
  • the solenoid mechanism which is called a stable type comprising a permanent magnet besides an electromagnet and a movable core, has the function to hold the position by the adsorption power of a permanent magnet on the operation edge of a movable core.
  • the solenoid mechanism of this stable type includes the mechanism which is called as a monostable type where the position is held by the part section within the range of the operation of a movable core and the mechanism which is called as a bistable type where the position is held at both ends within the range of the operation of a movable core.
  • the solenoid mechanism used for the operation mechanism of the vacuum breaker is a stable type in which the electromagnet can hold the position of the electrode even in the state of non-excitation.
  • This solenoid mechanism has few number of components and easy structure, and operates along only the straight line. Therefore, since the part of generating a large stress is caused and sliding with large contact pressure is a little, it has the merit of securing reliability easily.
  • SF 6 gas is used as insulation and arc-quenching medium in the switchgear of such a configuration as for isolation machine 6. It is known that this SF 6 gas has about three times the arc-quenching performance and about 100 times the insulation performances compared with air. In addition, this SF 6 gas is a very stable gas of colorlessness, scentless, taste, nonflammability in a usual state of the operation, and is nontoxic.
  • the decomposition products such as SOF 2 , SO 2 , SO 2 F 2 , SOF 4 , HF, and SiF 4 and the decomposition gases are generated by SF 6 gas. Since the decomposition product and the decomposition gas of this SF 6 gas have strong toxicity, special processing and the management are required when the decomposing gas is collected.
  • SF 6 gas is a greenhouse gas which causes earth warming, and the greenhouse effect coefficient is 24000 times larger than carbon dioxide. Therefore, SF 6 gas is added as a reduction target gas, and the action of control and reduction in the exhaust is requested. It is preferable not to use SF 6 gas as insulation and the arc-quenching medium of the isolator from respect of such an environment.
  • connection conductor 7 by heat from the contact of breaker 11 and isolator 6 becomes a disadvantage. Since heat from the contact of such breaker 11 and isolator 6 is generated by a Joule heat by the contact resistance in this part, some measures to lower the contact resistance are needed.
  • This vacuum switchgear has a fixed electrode and a ground electrode at both ends of the crisscross vacuum interrupter, and has a conducting axis and a movable electrode, which makes an orthogonal position to this a fulcrum.
  • the position of a movable core can be held only by the end portion within the range of the operation in the solenoid mechanism, and it is impossible to hold it stably at an intermediate position. Therefore, the electrode cannot be stably held in three positions of a close position (position where contact of movable electrode contacting with contact of fixed electrode), an open position and an isolation position, in addition, or four positions further including a ground position.
  • An object of the present invention is to provide a vacuum switchgear which comprises the vacuum interrupter with simple configuration and high reliability and the operation mechanism with high reliability to be able to achieve three positions of the close position, the open position and the isolation position, or four positions further including the ground position, and controls use amount of the insulation medium of SF 6 gas etc.
  • a vacuum switchgear which comprises a vacuum interrupter having simple structure and high reliability and the operation mechanism with high reliability being achievable to three positions of the close position, the open position, and the isolation position or four positions further including the ground position, can control use amount of the insulation medium of SF 6 gas etc. and can harmonize with the environment.
  • FIG. 2 is a profile which shows an example of the configuration of vacuum interrupter 20 in the vacuum switchgear according to the first embodiment.
  • Insulation cylinder 21 which consists of ceramic or glass, constructs airtight container, and the openings of both ends thereof are sealed up, respectively, by fixed side end plate 22 and movable side end plate 23.
  • Fixed conducting axis 25, to which fixed electrodes 24 is connected, is supported and fixed to fixed side end plate 22.
  • Movable electrode 26 opposed to fixed electrode 24 is fixed to movable conducting axis 27.
  • This movable conducting axis 27 is connected with an operation mechanism described later.
  • Contacts 28a and 28b which consists of various materials corresponding to the usage of vacuum interrupter 20, are set to each electrode to the side to which fixed electrode 24 and movable electrode 26 are contacted.
  • bellows 29 is allocated between movable conducting axis 27 and movable side cover plate 23, and movable electrode 26 can be moved along the straight line.
  • Arc shield 32 is arranged in an electrically insulated state at surroundings of fixed electrode 24 and movable electrode 26 to prevent soil of insulation cylinder 21 caused by metallic steam at the turn the current off.
  • the position where contacts 28a and 28b are contacted is assumed to the close position, the position where the gap length between each contact is d 1 is assumed to the open position when movable electrode 26 moves, and the position where the gap length between each contact is d 2 is assumed to the isolation position when movable electrode 26 further moves.
  • vacuum interrupter 20 when there is open instruction of the breaker from the control circuit of the vacuum switchgear (not shown in the figure), movable electrode 26 moves and the gap length between contacts 28a and 28b becomes d 1 (open position).
  • movable electrode 26 When there is open (isolation) instruction of the isolator from the control circuit of the vacuum switchgear, movable electrode 26 further moves and the gap length between each of contacts 28a and 28b becomes d 2 (isolation position).
  • contact 28b provided in movable electrode 26 continuously moves along a straight line at three positions of a close position, an open position, and an isolation position.
  • the breaker and the isolator are constructed by moving along the straight line continuously at three positions of the close position, the open position, and the isolation position of the contact, the operation thereabove with one operation mechanism becomes possible. It is possible to miniaturize the vacuum switchgear and lower the cost thereof from this respect.
  • FIG. 3 is profile which shows an example of configuration of vacuum interrupter 20 of vacuum switchgear according to the second embodiment. The same marks are fixed to the same parts of FIG. 2, the explanation will be omitted, and only parts different from FIG. 2 will be described here.
  • ground electrode 35 is provided at a position opposed to movable conducting axis 27 connected with said movable electrode 26, and the inside diameter of ground electrode 35 opposed to movable conducting axis 27 is reduced smaller than the outside diameter of movable electrode 26.
  • Insulation cylinders 21 and 36 are arranged between ground electrode 35 and metal end plates 2 and 3 of both ends thereof, respectively.
  • the position where contact 28b of movable electrode 26 contacts with contact 28a of fixed electrode 24 is the close position, and the position where the gap length between contacts 28a and 28b is d 6 is a ground position.
  • the movable electrode 26 can continuously move along the straight line at four positions of a close position, an open position, an isolation position, and a ground position.
  • vacuum interrupter 20 in a case of instructing of ground from the isolation state from the control circuit of the vacuum switchgear (not shown in the figure) when vacuum switchgear is checked, movable electrode 26 moves and is grounded at the position (ground position) where the gap length between contacts 28a and 28b becomes d 5 .
  • movable electrode 26 continuously moves along the straight line at four positions of the close position, the open position, the isolation position, and the ground position.
  • the vacuum switchgear can be miniaturized.
  • vacuum interrupter 20 Since the configuration of vacuum interrupter 20 is easy, the assembly of vacuum interrupter 20 becomes easy, and mass production becomes possible.
  • movable electrode 26 continuously moves along the straight line at four positions of the close position, the open position, the isolation position and the ground position for the contact, the operation thereabove with one operation mechanism becomes possible. It is possible to miniaturize the vacuum switchgear and lower the cost thereof from this respect.
  • the allowance of the insulation performance when contact 28b provided to movable electrode 26 shown in FIG. 2 is at the open position, is assumed to be 2 ⁇ for V 50 when 50% breakdown voltage is assumed to be V 50 .
  • the allowance of 3 ⁇ will be given for V 50 , where 3 ⁇ is the destruction probability of about 0.1%.
  • the breakdown voltage dispersion ⁇ between contacts 28a and 28b is large different depending on the contact material, the surface state, and the insulation current, etc., and is considered to 10 to 23%.
  • FIG. 4 is characteristic diagram which shows an example of relationship to ratio of gap length (that is, ratio of d 2 and d 1 ) which gives 3 ⁇ and gap length which gives 2 ⁇ and dispersion (standard deviation) ⁇ of breakdown voltage from the relationship of the above-mentioned breakdown voltage and the gap length.
  • ratio d 2 /d 1 of the gap length becomes about 1.3
  • ratio d 2 /d 1 of the gap length becomes about 2.6.
  • FIG. 5 is a characteristic diagram which shows an example of relationship of electric field intensity E1 of the end portion of fixed electrodes 24 and ratio of above-mentioned d 3 and d 2 .
  • electric field intensity Ec of the vertical axis is destruction electric field intensity in which the material of fixed electrode 24 is to be copper.
  • ratio d 3 /d 2 of the gap length becomes 0.5 or less, since the electric field intensity at the electrode end portion is determined by the gap length between fixed electrode 24 and arc shield 32, the electric field intensity at the electrode end portion becomes large with decreasing ratio d 3 /d 2 of the gap length.
  • ratio d 3 /d 2 of the gap length becomes large, since the diameter of vacuum interrupter 20 becomes large, it is desired that ratio d 3 /d 2 of the gap length as small as possible from the cost.
  • the ratio of d 3 and d 2 of the gap length is set at 0.35 to 0.8, the outside diameter of vacuum interrupter 20 is suppressed, and vacuum interrupter 20 with an excellent insulation characteristic can be obtained.
  • FIG. 6 is profile which shows an example of configuration of vacuum interrupter 20 of vacuum switchgear according to the embodiment.
  • the same marks are fixed to the same to part of FIG. 2, the explanation will be omitted, and only a different part will be described here.
  • Vacuum interrupter 20 has second shield 33 which surrounds the fixed electrode 24 and third shield 34 which surrounds said movable electrode 26, as shown in FIG. 6.
  • This second shield 33 and third shield 34 are supported and fixed with metallic end plates at both ends.
  • second shield 33 which surrounds fixed electrode 24, and third shield 34 which surrounds movable electrode 26, are provided and second shield 33 and third shield 34 are supported and fixed with metallic end plate at both ends, the electric field intensity of movable side contact 28b and fixed side contact 28a, movable electrode 26 and fixed electrode 24 can be decreased.
  • FIG. 7 is profile which shows an example of configuration of vacuum interrupter 20 of vacuum switchgear according to the embodiment.
  • the same marks are fixed to the same to FIG. 6 part, the explanation will be omitted, and only a different part will be described here.
  • second shield 33 which surrounds said fixed electrode 24, is supported and fixed with fixed conducting axis 25.
  • FIG. 8 is profile which shows an example of configuration of vacuum interrupter 20 of vacuum switchgear according to the embodiment.
  • the same marks are fixed to the same parts of FIGS. 6 and 7 and the explanation will be omitted. Only a different part will be described here.
  • second shield 33 which surrounds the fixed electrode 24 is supported and fixed with fixed electrode 24.
  • vacuum interrupter 20 since second shield 33, which surrounds fixed electrode 24, is supported and fixed with fixed electrode 24, similar function and advantage as a case of the above-mentioned sixth embodiment can be achieved, and the vacuum switchgear with excellent insulation performance can be obtained.
  • FIG. 9 is a characteristic diagram which shows an example of peripheral electric field intensity of second shield 33 and third shield 34 by the presence thereof.
  • straight line E0 with chain line shown in the upper end shows the electric field intensity on the surface of contact 28a or 28b when there are neither second shield 33 nor third shield 34
  • curve E1 shows the electric field intensity in the point of second shield 33 or third shield 34
  • curve E2 shows the electric field intensity on the surface of contact 28a or 28b at the isolation position.
  • Curve E1 is inversely proportional to ratio d 4 /d 2 of the gap length, and curve E2 is proportional to ratio d 4 /d 2 of the gap length.
  • Breakdown electric field intensity Ea is a value when the material of second shield 33 and third shield 34 is stainless steel
  • breakdown electric field intensity Eb is a value when the material of contacts 28a and 28b is a copper chrome alloy.
  • the material of second shield 33 and third shield 34 is made of stainless steel or tungsten.
  • second shield 33 and third shield 34 since the material of second shield 33 and third shield 34 is made of stainless steel or tungsten, the electric field intensity of movable side contact 28b, fixed side contact 28a, movable electrode 26 and fixed electrode 24 can be decreased, and the insulation performance of second shield 33 and third shield 34 can be improved.
  • FIG. 10 is a characteristic diagram which shows an example of comparing the thunder impulse breakdown voltage performances by the difference of the material of second shield 33 and third shield 34 performed by the invention inventor etc.
  • the material is copper (no oxygen copper), stainless steel (SUS 304), and tungsten.
  • the electrode shape used for the examination is a plate electrode of 34 mm in the diameter, and the gap length is 1.5 mm.
  • a breakdown voltage is 1.7 times in stainless steel and 1.9 times in tungsten compared with the copper material.
  • the vacuum switchgear can be miniaturized in addition to the advantage of the above-mentioned electric field relaxation.
  • vacuum interrupter 20 in vacuum interrupter 20 shown in above-mentioned FIGS. 6, 7, and 8, the electrochemical buffing processing or the electron beam processing (reforming layer by the irradiation of the electron beam) is performed on the surfaces of second shield 33 and third shield 34.
  • second shield 33 and third shield 34 are processed by the electrochemical buffing processing or the electron beam processing, the electric field intensity of movable side contact 28b, fixed side contact 28a, movable electrode 26 and fixed electrode 24 can be decreased, and the insulation performance of second shield 33 and third shield 34 can be improved.
  • FIG. 11 is a characteristic diagram, which shows an example of comparing the thunder impulse breakdown voltages by the difference of the surfaces of second shield 33 and third shield 34.
  • the electrolysis liquid is a mixture liquid of phosphoric acid and sulfuric acid.
  • the breakdown voltage of the dielectric breakdown in the vacuum rises every time the dielectric breakdown is repeated as understood from FIG. 11. This is called as conditioning effect, and the conditioning processing, in which this is used, is performed in the final step of manufacturing the vacuum interrupter.
  • FIG. 12 is characteristic diagram which shows an example of comparing a voltage characteristics of the electron beam processing with that of the electrochemical buffing processing for second shield 33 and third shield 34.
  • each gap length d 1 and d 5 (1.3 to 1.8).d 1 , it is possible to cooperate about the insulation between contacts at the open position of movable side contact 28b and the insulation of the ground device, and reliability can be improved.
  • the dispersion is 10 to 18% when the dispersion is shown by the standard deviation.
  • ratio d 5 /d 1 of the gap length becomes 1.3 to 1.8.
  • the insulation of ground electrode 35 and movable conducting axis 27 can be cooperated with the insulation at the isolation position, and the vacuum switchgear with low cost and high reliability can be obtained.
  • FIGS. 13A to 13C are profiles which show examples of configuration of operation mechanism in vacuum switchgear according to the embodiment, the configurations show at the close position, the open position, and the isolation position, respectively.
  • operation mechanism 50 is constructed by arranging two mechanism sections 60 and 70 in series.
  • insulation mechanism section 60 and isolation mechanism section 70 are arranged.
  • movable axis 61 of insulation mechanism section 60 is connected with movable conducting axis 27 of vacuum interrupter 20 through insulation stick 36, and movable conducting axis 71 of isolation mechanism section 90 is connected with frame 62 of insulation mechanism section 60 and screw section 91a.
  • Insulation mechanism section 60 is a mechanism for the insulation operation (open and close operation from the close position to the open position) to which the high-speed open and close operation is requested.
  • Isolation mechanism section 90 is a mechanism for the open and close operation from the open position to the isolation position.
  • the solenoid operation mechanism which has been known, can be used as insulation mechanism section 60, and has permanent magnet 63 fixed to surroundings in frame 62, movable core 64 and electromagnetic coil 65 fixed to movable axis 61, and coil spring 66 connected with a movable axis.
  • Isolation mechanism section 90 stores rotation axis 91 and motor 93, which is constructed as one body thereto, in frame 92.
  • Screw section 91a of rotation axis 91 is connected with frame 62 of insulation mechanism section 60, and connection length S shown in FIG. 13B becomes (d 2 - d 1 ) or more.
  • frame 62 can relatively move only in an axial direction for frame 92, but can not relatively rotate.
  • insulation mechanism section 60 First, the operation of insulation mechanism section 60 will be described.
  • the close position is held by exceeding the suck power with the flange part of movable core 64 and permanent magnet 63 than the compression power of coil spring 66.
  • movable core 64 is apart from permanent magnet 63, thereby, the suck power therebetween is small and the repulsion power of coil spring 66 is superior to the suck power and the open position is held.
  • the insulation operation is completed by the above-mentioned operation.
  • electromagnetic power between electromagnetic coil 65 and permanent magnet 63 is superior to the repulsion power of coil spring 66
  • movable axis 61 is driven in the direction of the close position while compressing coil spring 66 and is held at the close position shown in FIG. 13A by the suck power of permanent magnet 63, and the turning on operation is completed.
  • isolation mechanism section 90 Next, the operation of isolation mechanism section 90 will be described.
  • insulation mechanism section 60 and movable conducting axis 27 of vacuum interrupter 20 move from the isolation position of FIG. 13C to the open position of FIG. 13B, and the close operation is completed.
  • the operation mechanism of the vacuum switchgear in the first above-mentioned embodiment can be achieved with an easy configuration.
  • the present invention is not limited to this. It is also possible to connect the vacuum interrupter and the insulation mechanism section or the insulation mechanism section and the isolation mechanism section in series through the lever and the link.
  • connection length S of screw section 91a of the isolation mechanism section and frame 62 of the insulation mechanism section becomes (d 3 - d 1 ) or more in the operation mechanism of the vacuum switchgear shown in above-mentioned FIGS. 13A to 13C.
  • insulation mechanism section 60 performs insulation and the turning on operation from the close position to the open position
  • isolation mechanism section 90 performs the open operation from the open position to the isolation position
  • insulation mechanism section 60 and movable conducting axis 27 of vacuum interrupter 20 are driven from the isolation position to the ground position.
  • the operation mechanism of the vacuum switchgear in the above-mentioned second embodiment can be achieved by an easy configuration.
  • FIG. 14 is profile which shows an example of configuration of operation mechanism in vacuum switchgear according to the embodiment, and the configuration at the close position is shown in FIG. 14.
  • operation mechanism 50 is constructed by arranging three mechanism sections 60, 70 and 80 in series.
  • insulation mechanism section 60 isolation mechanism section 70 and ground mechanism section 80 are arranged.
  • insulation mechanism section 60 all of insulation mechanism section 60, isolation mechanism section 70, and ground mechanism section 80 are constructed by using the solenoid operation mechanism explained by FIGS. 13A to 13C.
  • movable axis 61 of insulation mechanism section 60 is connected with movable conducting axis 27 of vacuum interrupter 20 through insulation stick 36
  • movable axis 71 of isolation mechanism section 70 is connected with frame 62 of insulation mechanism section 60
  • movable axis 81 of ground mechanism section 80 is connected with frame 72 of isolation mechanism section 70.
  • the solenoid operation mechanism of insulation mechanism section 60 performs insulation and the turning on operation from the close position to the open position.
  • the operation mechanism of the vacuum switchgear in the above-mentioned second embodiment can be achieved by an easy configuration.
  • the operation mechanism is explained in the case of arranging three solenoid operation mechanisms in series, the present invention is not limited to this, a suitable solenoid operation mechanism for high-speed open and close operation may be used for the operation part as the breaker and suitable other operation mechanisms may be used for low-speed open and close operation as the isolator and the ground device, in this case, an operation mechanism with low cost can be obtained as a whole.
  • FIGS. 15A to 15C are profiles which show an example of configuration of operation mechanism in vacuum switchgear according to the embodiment, and show the configurations at the close position, the open position, and the isolation position, respectively.
  • insulation mechanism section 160 which is near vacuum interrupter 20 and isolation mechanism section 170 which is far from the vacuum interrupter 20 are arranged in series, and each mechanism section is constructed with the solenoid operation mechanism of the bistable type.
  • movable axis 161a which consists of non-magnetic body of stainless etc, is assembled to movable core 161 of insulation mechanism section 160, movable axis 161a is supported to a free sliding to guide material 166a which consists of non-magnetic body, and is assembled to movable conducting axis 27 through insulation stick 36.
  • Electromagnetic coils 165a and 165b are arranged in surrounding of movable core 161, and york 162 is arranged outside of electromagnetic coils 165a and 165b.
  • permanent magnet 163 is assembled to york 162 between electromagnetic coil 165a and 165b, and, for example, permanent magnet 163 is magnetized in the direction of the inside and outside such that the outside becomes S-pole and the inside becomes N-pole.
  • york 167 for the guide is assembled in permanent magnet 163.
  • isolation mechanism section 170 is constructed as well as above-mentioned insulation mechanism section 160, movable axis 171a, which consists of non-magnetic body, is assembled to movable core 171, movable axis 171a clings to york 162 of insulation mechanism section 160, and a point guides movable axis 161b of insulation mechanism section 160 with a free sliding.
  • Electromagnetic coils 175a and 175b and permanent magnet 173 magnetized in the direction of the inside and outside are arranged surrounding of movable core 171, york 172 is assembled around electromagnetic coil 175a and 175b, and york 172 is fixed to the base of operation mechanism 150 (not shown in the figure).
  • each electromagnetic coil is not excited at the close position shown in FIG. 15A, the upper end of movable core 161 of insulation mechanism section 160 is adsorbed by the upper part of york 162 by the magnetism of permanent magnet 163, and a magnetic path, which is shut in the direction indicated by an arrow shown in FIG. 15A, is formed.
  • movable core 171 is adsorbed by york 172.
  • the close operation if magnetic flux is generated in the direction of the arrow shown in FIG. 15A by exciting electromagnetic coil 165a and electromagnetic coil 175b at the same time, the close operation can be performed with high-speed with surely holding isolation mechanism section 170.
  • the operation between the open position and the close position is achieved by the high-speed reciprocation operation only of one movable electrode, the operation of insulation and turning on can surely be performed.
  • the solenoid operation mechanism of the bistable type is arranged in series, three positions of the close position, the open position, and the isolation position can surely be held by the adsorption power of a permanent magnet.
  • the holding power at the position of the other movable core is strengthened when one movable core is driven, even if the impact power etc. act, the position can surely be held. Therefore, the vacuum switchgear, which comprises the operation mechanism having simple structure and high reliability, can be achieved.
  • the configuration having the wipe spring mechanism which generates the power to press the closed electrode in the direction of further closed position, may be provided between a movable axis and movable electrode of insulation mechanism section 160.
  • permanent magnet may be assembled to a movable core, and a solenoid operation mechanism of the bistable type where the position is held by the adsorption power of a permanent magnet at both ends within the range of the operation of a movable core may be adapted.
  • FIGS. 16A to 16D are profiles which show an example of configuration of operation mechanism in vacuum switchgear according to the embodiment, and show the configurations at the close position, the open position, the isolation position, and the ground position, respectively.
  • operation mechanism 350 is constructed by arranging insulation mechanism section 360 which consists of the solenoid operation mechanism of the bistable type has already been explained in FIGS. 15A to 15C and isolation mechanism section 370 which is constructed by an electromagnetic actuator which can hold three positions in series.
  • movable core 361 of insulation mechanism section 360 is assembled to movable conducting axis 27 through insulation stick 36, electromagnetic coils 365a and 365b are assembled around movable core 361, and york 362 is assembled around electromagnetic coils 365a and 365b.
  • Permanent magnet 363 is assembled inside york 362 as well as the state explained in FIGS. 15A to 15C.
  • salient 371a, 371b, 371c, and 371d are formed to movable core 371 of isolation mechanism section 370 to which york 362 of insulation mechanism section 360 is connected, electromagnetic coils 375a and 375b are assembled the outside thereof, and york 372 is assembled around electromagnetic coils 375a and 375b.
  • permanent magnets 363a, 363b, 363c, and 363d are assembled to the position opposed to each above-mentioned salient 371a of movable cores 371, 371b, 371c, and 371d inside of york 372, permanent magnets 373a and 373b are magnetized to so that the inside may become S-pole and the outside may become N-pole, and permanent magnets 373c and 373d are magnetized so that the inside may become S-pole and the outside may become N-pole.
  • movable core 361 and movable core 371 are adsorbed by york 362 and york 372 by the magnetism of permanent magnet 363, permanent magnets 373a, and 373b, respectively.
  • the closed magnetic circuit indicated by the arrow shown in FIG. 16C is formed by opposing permanent magnets 373a, 373b, 373c, and 373d to salient 371a, 371b, 371c, and 371d of a movable core, the position is stably held.
  • the operation between the open position and the close position can surely be performed by the high-speed reciprocation operation only of one movable electrode. Since it constructs it by arranging electromagnetic actuator which stably holds three positions in series, four positions of the close position, the open position, the isolation position, and the ground position can surely be held by the adsorption power of the permanent magnet. In addition, since the holding power at the position of the other movable core is strengthened when the one movable core is driven, even if the impact power etc. act, the position can surely be held. Therefore, the vacuum switchgear having the operation mechanism with simple structure and high reliability can be achieved.
  • the present invention is not limited to this, the sensor which detects the position of a movable core may be provided, thereby reliability can be further improved.
  • FIG. 17 is a profile which shows an example of configuration of operation mechanism of vacuum switchgear according to the embodiment, and FIG. 17 shows the configuration at the close position.
  • operation mechanism 250 is constructed by insulation mechanism section 260, isolation mechanism section 270, and ground mechanism section 280 from a near side of vacuum interrupter 20, and each mechanism section is constructed by the solenoid operation mechanism of the bistable type explained in FIG. 15A to FIG. 15C.
  • movable cores 261 of insulation mechanism section 260 is connected with movable conducting axis 27 of vacuum interrupter 20 through insulation stick 36
  • movable cores 271 of isolation mechanism section 270 is connected with york 262 of insulation mechanism section 260
  • movable cores 281 of ground mechanism section 280 is connected with york 272 of isolation mechanism section 270.
  • Electromagnetic coils 265a, 265b, 275a, 275b, 285a, 285b, and permanent magnets 263, 273, 283 are assembled to the three above-mentioned mechanism sections, respectively.
  • the open and close operation of the close position and the open position is performed by the operation of insulation mechanism section 260
  • the open and close operation of the open position and the isolation position is performed by the operation of isolation mechanism section 270
  • the open and close operation of the isolation position and the ground position is performed by the operation of ground mechanism section 280.
  • each electromagnetic coil is excited to strengthen the holding power at the position of the other two movable cores.

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  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
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Claims (19)

  1. Vakuum-Schaltgetriebe, das folgendes aufweist:
    einen Vakuum-Unterbrecher (20) mit einer Dichtung, die an beiden Enden eines Isolationsbehälters (21) eingesetzt ist, wobei ein Isolationsmedium innerhalb eines ersten und zweiten metallischen Materials (22, 23) luftdicht umgeben bzw. abgeschlossen ist, wobei der Vakuum-Unterbrecher (20) eine feste Elektrode (24) hat, die das erste metallische Material (22) durchdringt und an.dem ersten metallischen Material (22) haftet, und eine bewegbare Elektrode (26), die das zweite metallische Material (23) durchdringt und an dem zweiten metallischen Material (23) durch ein Gebläse (29) fixiert ist und derart vorgesehen ist, dass sie der festen Elektrode (24) gegenüberliegt;
    gekennzeichnet durch
    einen Betätigungsmechanismus (60, 90), der die bewegbare Elektrode (26) entlang einer geraden Linie bei drei Positionen, jeweils einer geschlossenen Position, einer offenen Position und einer Isolationsposition, bewegt, wobei dann, wenn angenommen wird, dass eine Spaltlänge zwischen Kontakten bei der offenen Position d1 ist, und angenommen wird, dass eine Spaltlänge zwischen der bewegbaren Elektrode (26) und der festen Elektrode (24) bei der Isolationsposition d2 ist, jede der Spaltlängen d1 und d2 derart eingestellt ist, dass sie die folgende Beziehung erfüllt: d 2 = ( 1 , 3   bis   2 , 6 ) × d 1
    Figure imgb0006
  2. Vakuum-Schaltgetriebe, das folgendes aufweist:
    einen Vakuum-Unterbrecher (20) mit einer Dichtung, die an beiden Enden eines Isolationsbehälters (21) eingesetzt ist, wobei ein Isolationsmedium innerhalb eines ersten und eines zweiten metallischen Materials (22, 23) luftdicht umgeben bzw. abgeschlossen ist, wobei der Vakuum-Unterbrecher (20) eine feste Elektrode (24) hat, die das erste metallische Material (22) durchdringt und sich an das erste metallische Material (22) heftet, eine bewegbare Elektrode (26), die das zweite metallische Material (23) durchdringt und sich durch ein Gebläse (29) an das zweite metallische Material (23) heftet und derart vorgesehen ist, dass sie der festen Elektrode (24) gegenüberliegt,
    gekennzeichnet durch
    eine Erdungselektrode (35), die auf einer Seite (24) der bewegbaren Elektrode (26) vorgesehen ist, die nicht gegenüber der festen Elektrode ist; und
    einen Betätigungsmechanismus (60, 70, 80), der die bewegbare Elektrode (26) entlang einer geraden Linie bei vier Positionen, nämlich jeweils einer geschlossenen Position, einer offenen Position, einer Isolationsposition und einer Erdungsposition, bewegt, wobei
    dann, wenn angenommen wird, dass eine Spaltlänge zwischen Kontakten bei der offenen Position d1 ist, und angenommen wird, dass eine Spaltlänge zwischen der bewegbaren Elektrode (26) und der festen Elektrode (24) bei der Isolationsposition d2 ist, jede der Spaltlängen d1 und d2 derart eingestellt ist, dass sie die folgende Beziehung erfüllt: d 2 = ( 1 , 3   bis   2 , 6 ) × d 1 .
    Figure imgb0007
  3. Vakuum-Schaltgetriebe nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet, dass es weiterhin eine Lichtbogenabschirmung (32) aufweist, die vorgesehen ist, um die feste Elektrode (24) und die bewegbare Elektrode (26) zu umgeben, wobei dann, wenn angenommen wird, dass jede einer Spaltlänge zwischen der Lichtbogenabschirmung (32) und der festen Elektrode (24) und einer Spaltlänge zwischen der Lichtbogenabschirmung (32) und der bewegbaren Elektrode (26) d3 ist, und angenommen wird, dass eine Spaltlänge zwischen Kontakten bei der Isolationsposition d2 ist, jede der Spaltlängen d2 und d3 derart eingestellt ist, dass sie die folgende Beziehung erfüllt: d 3 = ( 0 , 35  bis  0 , 8 ) × d 2 .
    Figure imgb0008
  4. Vakuum-Schaltgetriebe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass es folgendes aufweist:
    eine zweite Abschirmung (33), die die feste Elektrode (24) umgibt, und eine dritte Abschirmung (34), die die bewegbare Elektrode (26) umgibt, von welchen jede in der Lichtbogenabschirmung (32) vorgesehen ist, wobei die zweite Abschirmung (33) und die dritte Abschirmung (33) an dem ersten und dem zweiten metallischen Material (22, 23) gelagert und befestigt sind.
  5. Vakuum-Schaltgetriebe nach Anspruch 4,
    dadurch gekennzeichnet, dass
    die zweite Abschirmung (33) an einer Führungsachse (25) gelagert und befestigt ist, die mit der festen Elektrode (24) verbunden ist.
  6. Vakuum-Schaltgetriebe nach Anspruch 4,
    dadurch gekennzeichnet, dass die zweite Abschirmung (33) an der festen Elektrode (24) gelagert und fixiert ist.
  7. Vakuum-Schaltgetriebe nach einem der Ansprüche 2 und 4 bis 6,
    dadurch gekennzeichnet, dass
    dann, wenn angenommen wird, dass eine Spaltlänge zwischen der zweiten Abschirmung (33) und der dritten Abschirmung (34) d4 ist, und angenommen wird, dass eine Spaltlänge zwischen den Kontakten bei der Isolationsposition d2 ist, jede der Spaltlängen d2 und d4 derart eingestellt ist, dass sie die folgende Beziehung erfüllt: d 4 = ( 0 , 6   bis   0 , 95 ) × d 2 .
    Figure imgb0009
  8. Vakuum-Schaltgetriebe nach einem der Ansprüche 4 bis 7,
    dadurch gekennzeichnet, dass
    die zweite Abschirmung (33) und die dritte Abschirmung (34) zu rostfreiem Stahl gemacht sind.
  9. Vakuum-Schaltgetriebe nach einem der Ansprüche 4 bis 7,
    dadurch gekennzeichnet, dass
    die zweite Abschirmung (33) und die dritte Abschirmung (34) aus Wolfram hergestellt sind.
  10. Vakuum-Schaltgetriebe nach einem der Ansprüche 4 bis 8,
    dadurch gekennzeichnet, dass
    Oberflächen der zweiten Abschirmung (33) und der dritten Abschirmung (34) durch die elektrochemische Polierverarbeitung verarbeitet sind.
  11. Vakuum-Schaltgetriebe nach einem der Ansprüche 4 bis 8,
    dadurch gekennzeichnet, dass
    eine Nachformierungsschicht durch eine Strahlung eines Elektronenstrahls auf Oberflächen der zweiten Abschirmung (33) und der dritten Abschirmung (34) vorgesehen ist.
  12. Vakuum-Schaltgetriebe nach Anspruch 2,
    dadurch gekennzeichnet, dass
    dann, wenn angenommen wird, dass die Spaltlänge zwischen der Führungsachse, an welcher die bewegbare Elektrode (26) haftet, und Erdungselektroden (35), die gegenüberliegend zu dieser sind, d5 ist, und die Spaltlänge zwischen den Kontakten für eine offene Position d1 ist, jede der Spaltlängen d1 und d5 derart eingestellt ist, dass sie die folgende Beziehung erfüllt: d 5 = ( 1 , 3   bis   1 , 8 ) × d 1 .
    Figure imgb0010
  13. Vakuum-Schaltgetriebe nach einem der Ansprüche 1 und 4 bis 12,
    dadurch gekennzeichnet, dass
    der Betätigungsmechanismus einen Isolationsmechanismusabschnitt (60) und einen Isolationsmechanismusabschnitt (90) hat, von welchen jeder seriell angeordnet ist und sich in einer geraden Linie zwischen zwei Positionen bewegt,
    ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (60) mit der bewegbaren Elektrode (26) verbunden ist und eine Öffnungs- und Schließoperation der Spaltlänge d1 durchführt, und
    ein Rahmen des Isolationsmechanismusabschnitts (60) mit einem bewegbaren Abschnitt des Isolationsmechanismusabschnitts (90) verbunden ist und der Isolationsmechanismusabschnitt (90) eine Öffnungs- und Schließoperation von der Spaltlänge d1 bis zu der Spaltlänge d2 durchführt.
  14. Vakuum-Schaltgetriebe nach einem der Ansprüche 2 und 3 bis 12,
    dadurch gekennzeichnet, dass
    der Betätigungsmechanismus einen Isolationsmechanismusabschnitt (60) hat, der seriell angeordnet ist und sich zwischen zwei Positionen in einer geraden Linie bewegt, und einen Isolationsmechanismusabschnitt (90) hat, der sich entlang der geraden Linie mit drei Positionen, einschließlich einer Zwischenstelle, bewegt,
    ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (60) mit der bewegbaren Elektrode (26) verbunden ist und eine Öffnungs- und Schließoperation der Spaltlänge d1 durchführt, und
    ein Rahmen des Isolationsmechanismusabschnitts (60) mit einem bewegbaren Abschnitt des Isolationsmechanismusabschnitts (90) verbunden ist und der Isolationsmechanismusabschnitt (90) Öffnungs- und Schließoperationen in zwei Stufen von der Spaltlänge d1 bis zu der Spaltlänge d2 und von der Spaltlänge d2 bis zu der Spaltlänge d3 durchführt.
  15. Vakuum-Schaltgetriebe nach einem der Ansprüche 2 und 3 bis 12,
    dadurch gekennzeichnet, dass der Betätigungsmechanismus seriell angeordnet ist und einen Isolationsmechanismusabschnitt (60), einen Isolationsmechanismusabschnitt (70) und einen Erdungsmechanismusabschnitt (80) hat, von welchen sich jeder zwischen zwei Positionen entlang einer geraden Linie bewegt,
    ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (60) mit der bewegbaren Elektrode (26) verbunden ist und eine Öffnungs- und Schließoperation der Spaltlänge d1 durchführt,
    ein Rahmen des Isolationsmechanismusabschnitts (60) mit einem bewegbaren Abschnitt des Isolationsmechanismusabschnitts (70) verbunden ist und der Isolationsmechanismusabschnitt (70) eine Öffnungs- und Schließoperation von der Spaltlänge d1 bis zu der Spaltlänge d2 durchführt und ein Rahmen des Isolationsmechanismusabschnitts (70) mit einem bewegbaren Abschnitt des Erdungsmechanismusabschnitts (80) verbunden ist und der Erdungsmechanismusabschnitt (80) eine Öffnungs- und Schließoperation von der Spaltlänge d2 bis zu der Spaltlänge d3 durchführt.
  16. Vakuum-Schaltgetriebe nach Anspruch 13, dadurch gekennzeichnet, dass
    jeder des Isolationsmechanismusabschnitts (160) und des Isolationsmechanismusabschnitts (170) durch den Magnetmechanismus aufgebaut ist, der eine elektromagnetische Spule, ein Joch, einen bewegbaren Kern und einen Permanentmagneten aufweist, oder den Magnetmechanismus, der weiterhin die Feder aufweist, wenn es nötig ist,
    ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (160) ein bewegbarer Kern des ersten Magnetmechanismus ist, der Rahmen des Isolationsmechanismusabschnitts (160) ein Joch des ersten Magnetmechanismus ist, ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (170) ein bewegbarer Kern des zweiten Magnetmechanismus ist, und ein Rahmen des Isolationsmechanismusabschnitt (170) ein Joch des zweiten Magnetmechanismus ist, und
    jeder der bewegbaren Kerne eine Schütteloperation durch einen Magnetismus der elektromagnetischen Spule und des Permanentmagneten oder, wenn es nötig ist, weiterhin durch die Wiederherstellkraft der Feder durchführt und bei beiden Enden innerhalb des Betriebsbereichs des bewegbaren Kerns die Position durch eine Adsorptionskraft des Permanentmagneten oder, wenn es nötig ist, weiterhin durch die Wiederherstellkraft der Feder hält.
  17. Vakuum-Schaltgetriebe nach Anspruch 14, dadurch gekennzeichnet, dass
    der Isolationsmechanismusabschnitt (360) durch einen Magnetmechanismus aufgebaut ist, der eine elektromagnetische Spule, ein Joch, einen bewegbaren Kern und einen Permanentmagneten aufweist, oder den Magnetmechanismus, der weiterhin die Feder aufweist, wenn es nötig ist,
    ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (360) ein bewegbarer Kern des Magnetmechanismus ist, und der Rahmen des Isolationsmechanismusabschnitts (360) das Joch ist,
    der bewegbare Kern die Schütteloperation durch einen Magnetismus der elektromagnetischen Spule und des Permanentmagneten oder, , wenn es nötig ist, weiterhin durch die Wiederherstellkraft der Feder durchführt, und bei beiden Enden innerhalb des Betriebsbereichs des bewegbaren Kerns, und die Position durch eine Adsorptionskraft des Permanentmagneten oder, wenn es nötig ist, weiterhin durch eine Wiederherstellkraft der Feder gehalten wird,
    der Isolationsmechanismusabschnitt (370) ein elektromagnetisches Stellglied ist, das einen bewegbaren Kern und einen Permanentmagneten aufweist, in welchem der Aufbau derart ausgebildet ist, dass er dem Aufbau eines Jochs gegenüberliegt, und das Joch, mit welchem eine elektromagnetische Spule und der Aufbau ausgebildet sind, und ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (370) ein bewegbarer Kern des elektromagnetischen Stellglieds ist,
    der Rahmen des Isolationsmechanismusabschnitts (370) ein Joch des elektromagnetischen Stellglieds ist, und
    der bewegbare Kern die Schütteloperation durch den Magnetismus der elektromagnetischen Spule und eines Permanentmagnets durchführt und die Position durch die Adsorptionskraft des Permanentmagneten hält, und bei beiden Enden innerhalb des Betriebsbereichs des bewegbaren Kerns, und die Position durch den Magnetismus des Permanentmagneten durch Gegenüberliegen des Aufbaus des Jochs zu dem Aufbau des bewegbaren Kerns bei einer Zwischenposition innerhalb des Betriebsbereichs hält.
  18. Vakuum-Schaltgetriebe nach Anspruch 15, dadurch gekennzeichnet, dass
    der Isolationsmechanismusabschnitt (260), der Isolationsmechanismusabschnitt (270) und ein Erdungsmechanismusabschnitt (280) jeweils durch einen Magnetmechanismus aufgebaut sind, der eine elektromagnetische Spule, ein Joch, einen bewegbaren Kern und einen Permanentmagneten aufweist, oder durch einen Magnetmechanismus aufgebaut sind, der weiterhin die Feder aufweist, wenn es nötig ist,
    ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (260) ein bewegbarer Kern des ersten Magnetmechanismus ist, der Rahmen des Isolationsmechanismusabschnitts (260) ein Joch des ersten Magnetmechanismus ist, ein bewegbarer Abschnitt des Isolationsmechanismusabschnitts (270) ein bewegbarer Kern des zweiten Magnetmechanismus ist, der Rahmen des Isolationsmechanismusabschnitts (270) ein Joch des zweiten Magnetmechanismus ist, ein bewegbarer Abschnitt des Erdungsmechanismus ein bewegbarer Kern des dritten Magnetmechanismus ist, und der Rahmen des Erdungsmechanismusabschnitts (280) ein Joch des dritten Magnetmechanismus ist, und
    jeder der bewegbaren Kerne die Schütteloperation durch einen Magnetismus der elektromagnetischen Spule und des Permanentmagneten durchführt und weiterhin durch die Wiederherstellkraft der Feder, wenn es nötig ist, und bei beiden Enden innerhalb des Betriebsbereichs des bewegbaren Kerns, ein Halten der Position durch die Adsorptionskraft des Permanentmagneten oder weiterhin durch die Wiederherstellkraft der Feder, wenn es nötig ist.
  19. Vakuum-Schaltgetriebe nach einem der Ansprüche 16 bis 18, dadurch gekennzeichnet, dass
    wenn der bewegbare Kern durch Erregen von einer elektromagnetischen Spule des Magnetmechanismus und einer elektromagnetischen Spule des elektromagnetischen Stellglieds bewegt wird, die andere elektromagnetische Spule erregt wird, um die Haltekraft bei der Position von anderen bewegbaren Kernen, die sich nicht bewegen, zu stärken.
EP99123233A 1998-11-27 1999-11-26 Vakuumschaltgerät Expired - Lifetime EP1005058B1 (de)

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DE69931583D1 (de) 2006-07-06
DE69931583T2 (de) 2007-04-26
JP3664899B2 (ja) 2005-06-29
EP1005058A3 (de) 2001-07-11
JP2000164084A (ja) 2000-06-16
EP1005058A2 (de) 2000-05-31
CN1256503A (zh) 2000-06-14
CN1214422C (zh) 2005-08-10

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