US3914568A - High-voltage vacuum switch - Google Patents

High-voltage vacuum switch Download PDF

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Publication number
US3914568A
US3914568A US499740A US49974074A US3914568A US 3914568 A US3914568 A US 3914568A US 499740 A US499740 A US 499740A US 49974074 A US49974074 A US 49974074A US 3914568 A US3914568 A US 3914568A
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US
United States
Prior art keywords
contacts
switch
shielding electrodes
contact
shielding
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
US499740A
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English (en)
Inventor
Donald W Crouch
Donald R Kurtz
Joseph C Sofianek
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US499740A priority Critical patent/US3914568A/en
Priority to AU81743/75A priority patent/AU491959B2/en
Priority to CA228,770A priority patent/CA1036203A/en
Priority to ES438988A priority patent/ES438988A1/es
Priority to SE7508494A priority patent/SE395792B/xx
Priority to BR7504950*A priority patent/BR7504950A/pt
Priority to GB33516/75A priority patent/GB1520922A/en
Priority to DE19752536024 priority patent/DE2536024A1/de
Priority to CH1073175A priority patent/CH591156A5/xx
Priority to IT26481/75A priority patent/IT1041964B/it
Priority to FR7525852A priority patent/FR2282712A1/fr
Priority to JP50101305A priority patent/JPS5910006B2/ja
Application granted granted Critical
Publication of US3914568A publication Critical patent/US3914568A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • 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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • 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
    • H01H2033/028—Details the cooperating contacts being both actuated simultaneously in opposite directions
    • 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

Definitions

  • the disclosed vacuum switch has features that give it exceptional high-voltage withstand ability even after its contacts have been roughened by the effects of arcing.
  • Both contacts of the switch are arranged to move during opening and closing operations. When the switch is fully-open, the contacts are located in shielded positions behind the front faces of shielding electrodes which respectively surround the contacts. During closing, each of the two contacts is driven out of its fully-open shielded position into the gap between the two shielding electrodes, engaging the other contact when thecontacts are approximately midway between the shielding electrodes.
  • the switch of the present application comprises relatively-movable contacts that are driven together to effect switch-closing and are separated to effect switchopening.
  • a pre-strike usually occurs during the final stage of a closing operation before the contacts engage each other. That is, as the contacts near each other during this final stage, the high voltage present therebetween causes a breakdown (or pre-strike) between the still-spaced contacts, which is followed by arcing until the contacts actually engage.
  • This arcing tends to roughen the contacts, not only because of its erosive effect but also because it leads to welds between the contacts which must be broken on a subsequent opening operation. Such roughening ordinarily detracts from the ability of the switch to withstand high voltages when in its open position.
  • An object of my invention is to construct the switch in such a manner that when fully open it can withstand exceptionally high voltages despite contact-roughness produced by prior arcing and other related effects.
  • each shielding electrode being electrically connected to its associated rod.
  • These shielding electrodes are mounted in fixed spaced-apart positions and have front faces facing each other. When the switch is fully open, its contacts are located behind the front faces of the shielding electrodes in regions of relatively lowintensity electric field. With the contacts thus shielded from high-intensity electric field by the shielding electrodes, there is a greatly reduced likelihood that a breakdown will be initiated between the contacts.
  • the shielding electrodes have smooth front faces, and the breakdown voltage between these faces is high. But if these faces become roughened by arcing or the effects of arcing, the ability of the switch to withstand high voltages across the gap between these faces is seriously impaired.
  • another object of the invention is to construct the contacts and shielding electrodes in such a manner that the shielding electrodes can be located relatively close to the arcing regions of the contacts when the switch is fully open, thus providing effective shielding action, yet with relatively little exposure of the shielding electrodes to being roughened by arcing or the effects of arcing.
  • FIG. 1 is a cross sectional view through a vacuum switch embodying one form of the invention. Solid lines are used to show the switch contacts in their fully open position and dotted lines to show the contacts in their fully closed position.
  • FIG. 2 is a schematic illustration showing the switch and a suitable operating linkage therefor.
  • FIG. 3 is an enlarged view of a portion of FIG. 1 showing a portion of the adjacent electric field.
  • the vacuum switch shown therein comprises a highly-evacuated, sealed envelope 10.
  • This envelope comprises a cylindrical casing 11 of insulating material and a pair of metallic end caps 12 and 13 at opposite ends of the casing. Suitable seals 14 are provided between the end caps and the casing to provide vacuum-tight joints between these parts.
  • the normal pressure within the envelope is lower than 10" torr.
  • a suitable metallic shield 15 suitably supported on casing 11 and preferably electrically isolated from both end caps 12 and 13.
  • This shield 15 acts in a known manner to'intercept arc-generated vapors before they can reach casing l 1.
  • Contact 17 is suitably fixed to the inner end of a conductive contact rod 17a that extends freely through the lower end cap 12.
  • a flexible bellows 20 that is secured in sealed relationship at its respective opposite ends to the end cap 12 and the contact rod 17a.
  • This bellows 20 allows contact rod 17a to move in a direction longitudinal of the rod without impairing the vacuum in the envelope.
  • Contact 18 is fixed to the inner end of a corresponding contact rod 18 a that extends freely through the upper end cap 13.
  • a flexible bellows 21 provides a vacuumtight seal about cont-act rod 18 and allows this contact rod to move longitudinally without impairing the vacuum in the envelope.
  • End cap 12 is maintained at the same potential as contact 17 by virtue of a flexible electrical connection 16 therebetween, and end cap 13 is maintained at the same potentialas contact 18 by virtue of a flexible electrical connection 19 therebetween.
  • Guiding the contact rod 17a for substantially straight line movement in a vertical direction is a fixed sleeve bearing 24 located outside the envelope and supported on end cap 12.
  • a corresponding sleeve bearing 26 guides "the other contact rod 18a for substantially straight-line movement in a vertical-direction.
  • each of the shielding electrodes surrounds its associated contact and contact rod in radially spaced relationship thereto and is electrically connected to its associated contact so as to be at substantially the same-potential as the contact.
  • a metallic tube35 is provided about contact rod 17a, and a cup shaped metallic shield 37 supports this tube 35 on the lower end cap 12.
  • the cup shaped shield 37 has its lower end brazed to end cap 12 and its upper end brazed to the tube 35.
  • the upper end of tube 35 is suitably joined to the lower end of shielding electrode 30.
  • Structure 35, 37 electrically connects shielding electrode 30 to the lower end cap 12 and hence to the contact rod 17a.
  • the other shielding electrode 32 is supported on and is electrically connected to the upper end cap 13 by metallic structure 35a, 37a corresponding to the abovedescribed structure 35, 37.
  • Closing of the switch is effected by driving the two contacts 17 and 18 toward each other from their solidline positions of FIG. 1 into their dotted-line positions of FIG. 1.
  • Each of the contacts has a contact-making surface 40 on its inner end facing the other contact.
  • This reference plane 42 extends perpendicular to the longitudinal axes of the rods and is located substantially midway between the front faces 50 of the shielding electrodes 30 and 32.
  • opening of the switch is effected when desired by returning the two contacts 17 and 18 from their dotted-line closed positions to their solid-line fully open positions.
  • FIG. 2 A suitable mechanical linkage for effecting the abovedescribed equal and opposite motion of the two contacts 17 and 18 with respect to reference plane 42 is illustrated in FIG. 2.
  • This linkage comprises two portions 60 and 60a and a vertically movable operating rod 62 to which these two portions are pivotally connected.
  • Portion 60 corresponds to a linkage 110 disclosed in US. Pat. No. 3,594,525-Miller assigned to the assignee of the present invention.
  • it comprises two bellcranks 63 and 64, each mounted on a stationary pivot, and interconnected by a wipe mechanism 65.
  • One arm of bellcrank 63 is pivotally connected to the contact rod 17a and the other is pivotally connected to one end of wipe mechanism 65.
  • the other bellcrank 64 has one arm pivotally connected to the other end'of wipe mechanism 65 and its other arm pivotally connected to the operating rod 62.
  • the wipe mechanism 65 has been shown in schematic form only since it can be of any suitable conventional type, for example, that shown in FIG. 5 of US. Pat. No. 3,025,173-Frank, assigned to the assignee of the present invention.
  • One purpose of the wipe mechanism is to allow a certain amount of overtravel of the driving parts after the contacts have engaged at the end of the closing stroke.
  • the other linkage portion 60a is substantially the same as linkage portion 60 and therefore will not be described in detail.
  • Corresponding components of the two linkages have been assigned corresponding reference numerals except for the suffix a attached to the parts of linkage 60a.
  • the crank 63a is inverted relative to the crank 63 and thus produces downward motion of contact rod 18a when the operating rod is moved downwardly.
  • contact rods 17a and 18a move in opposite directions in response to unidirectional movement of operating rod 62.
  • the parts of the linkage are so proportioned that the contact rods move through substantially equal strokes at substantially equal speeds.
  • a high voltage is present between the contacts 17, 18 when the switch is fully open and also during a closing operation, but no voltage is present across the contacts while the switch is in the process of opening.
  • the high voltage present between the contacts can produce a breakdown, or pre-strike, between the contacts as they near each other during the final stages of the closing operation. This breakdown is' followed by arcing between the contacts, whichcontinues until the contacts engage each other and thus short out the arc. This are tends to roughen the contacts not only because it erodes them but also because it leads to contact-welding when the arc-melted portions of the contacts engage. When the contacts are separated during a subsequent opening operation, the weld is broken, thus leading to additional surface roughness.
  • equipotential lines of the field adjacent the other shielding electrode -32' have a correspondin'gconfiguration and the fully open c'ontact'l81 is-thus' also'in a region of correspondingly low field intensity.
  • This low field intensity adjacent the contact-making faces 40 very'materially reduces the likelihood that-abreakdown will be initiated from the contacts, even-though the contacts may have been roughened by prior arcing andthe'effects fsuch arcing-gas described hereinabov'e 1 I l i
  • the contactmaking surfaces are on or closely adjacent the central reference plane 42 whenthey engage at the end "of' the closing operation.
  • any arcing that results from a pre-strike occursbetw efen the sur faces 40 when these surfaces are near the central reference plane 42.
  • the illustrated switch is intended to be used in exceptionally high voltage applications, we make the gap between the electrodes 30, 32 unusually long for a vacuum switch, e.g., about 2 inches, thus locating the central reference plane where the contacts engage about 1 inch from each of the shielding electrodes.
  • This relatively large distance substantially reduces the chance that an arc resulting from a pre-strike when the closing contacts are nearing reference plane 42 will originate on or contact either shielding electrode.
  • the fact that the pre-strike arcing location is longitudinally displaced from both shielding electrodes also plays an important role in keeping the pre-strike are off the electrodes and in reducing the chance that the electrodes will be splattered by arc-generated molten metal from the contacts.
  • the contacts in one embodiment of our invention, of beryllium or a primarily beryllium material, as is disclosed and claimed in U.S. Pat. No. 3,143,373-Horn, assigned to the assignee of the present invention.
  • Beryllium has exceptionally good dielectric strength properties and exceptional resistance to being roughened by an are or the effects of arcing.
  • the shielding electrodes are preferably made of a hard, high ductility" ferrous material such as one of those disclosed and claimed in U.S. Pat. No.
  • cup-shaped metallic support 37 for the shielding electrode 30 as a means for reducing the electrical field intensity in the region of the seal 14. Since this cupshaped support 37 extends closely adjacent the inner insulating wall of the cylindrical casing 11 for a substantial distance past the seal 14 toward the central reference plane 42, the electric field in the region of the seal has a relatively low intensity as indicated by its equipotential lines of about percent and percent, the approximate configurations of which are shown at 70a and 70b, respectively.
  • This shielding effect for the seal desirably counteracts the known tendency for electrical stress to concentrate at glass-to-metal interfaces such as present in the seal 14. Cup-shaped support 37a produces this same shielding effect for the seal 14 at the upper end of the cylindrical casing 11.
  • a high-voltage vacuum switch comprising:
  • a. a highly-evacuated envelope comprising spacedapart conductive ends and electrical insulating means located between said ends for insulating the ends from each other when the interrupter is open and the ends are at different potentials;
  • sealing means providing a seal between each of said rods and its associated end and permitting longitudinal movement of said rod with respect to said associated end
  • said rods being longitudinally movable toward each other to drive said contacts into a closed position where said contact-making surfaces engage each other and being longitudinally movable away from each other to effect opening of said switch
  • f.va generally annular shielding electrode surrounding each of said rods and electrically connected to the I rod surrounded thereby
  • each of said shielding electrodes having a front surface facing the other shielding electrode
  • each of said rods being movable during a switchopening operation into a withdrawn open position wherein the contact-making surface of its associated contact is located behind said front surface of its associated shielding electrode.
  • said shielding electrodes are spaced from said contact-making regions by a sufficiently large distance that arcing during opening is normally confined to said contacts and excluded from said shielding electrodes.
  • Switching equipment comprising the switch of claim l, means for applying voltages between said ends that normally cause pre-strikes to occur during a clos- I ing operation, and means for locating the contactmaking surfaces of both of said contacts well ahead of said front surfaces of said shielding electrodes at the time of saidpre-stikes, thereby normally confining the arcs resulting from such pre-strikes to said contacts and excluding said arcs from said shielding electrodes.
  • Switching equipment comprising the switch of claim 1, means for applying voltages .between said ends that normally cause pre-strikes to occur during a closing operation, and means for locating the contactmaking surfaces of both of said contacts in a region of the gap between said shielding electrodes that is longitudinally spaced from both of said shielding electrodes at the time of said pre-strikes, thereby normally confining the arcs resulting from such pre-strikes to said contacts and, excluding said arcs from said shielding electrodes.

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  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US499740A 1974-08-22 1974-08-22 High-voltage vacuum switch Expired - Lifetime US3914568A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US499740A US3914568A (en) 1974-08-22 1974-08-22 High-voltage vacuum switch
AU81743/75A AU491959B2 (en) 1975-06-02 High-voltage vacuum switch
CA228,770A CA1036203A (en) 1974-08-22 1975-06-05 High-voltage vacuum switch
ES438988A ES438988A1 (es) 1974-08-22 1975-06-30 Mejoras en la construccion de interruptores de vacio de altovoltaje.
SE7508494A SE395792B (sv) 1974-08-22 1975-07-25 Vakuumstromstellare
BR7504950*A BR7504950A (pt) 1974-08-22 1975-08-01 Disjuntor a vacuo de alta tensao
GB33516/75A GB1520922A (en) 1974-08-22 1975-08-12 High-voltage vacuum switch
DE19752536024 DE2536024A1 (de) 1974-08-22 1975-08-13 Hochspannungsvakuumschalter
CH1073175A CH591156A5 (de) 1974-08-22 1975-08-18
IT26481/75A IT1041964B (it) 1974-08-22 1975-08-21 Interruttore sotto vuoto per alta tensione
FR7525852A FR2282712A1 (fr) 1974-08-22 1975-08-21 Interrupteur sous vide a haute tension
JP50101305A JPS5910006B2 (ja) 1974-08-22 1975-08-22 高圧真空遮断器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US499740A US3914568A (en) 1974-08-22 1974-08-22 High-voltage vacuum switch

Publications (1)

Publication Number Publication Date
US3914568A true US3914568A (en) 1975-10-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
US499740A Expired - Lifetime US3914568A (en) 1974-08-22 1974-08-22 High-voltage vacuum switch

Country Status (11)

Country Link
US (1) US3914568A (de)
JP (1) JPS5910006B2 (de)
BR (1) BR7504950A (de)
CA (1) CA1036203A (de)
CH (1) CH591156A5 (de)
DE (1) DE2536024A1 (de)
ES (1) ES438988A1 (de)
FR (1) FR2282712A1 (de)
GB (1) GB1520922A (de)
IT (1) IT1041964B (de)
SE (1) SE395792B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997748A (en) * 1975-06-23 1976-12-14 General Electric Company Vacuum interrupter with primary electrode surrounded by high dielectric strength shield
US4052576A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Contact structure for SF6 arc spinner
US4052577A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Magnetically driven ring arc runner for circuit interrupter
US4081640A (en) * 1976-04-19 1978-03-28 General Electric Company Compact vacuum switch for high voltage circuit interruption
US4234771A (en) * 1976-12-09 1980-11-18 Tokyo Shibaura Denki Kabushiki Kaisha Vacuum switch
US4847456A (en) * 1987-09-23 1989-07-11 Westinghouse Electric Corp. Vacuum circuit interrupter with axial magnetic arc transfer mechanism
FR2827075A1 (fr) * 2001-07-05 2003-01-10 Schneider Electric Ind Sa Appareillage electrique de coupure et de sectionnement comportant une ampoule sous vide
EP2063442A1 (de) * 2007-11-20 2009-05-27 ABB Technology AG Leistungsschalter mit flexiblen Leitern
CN100530481C (zh) * 2007-06-05 2009-08-19 西安交通大学 一种252kV单断口真空灭弧室
US10304644B2 (en) * 2014-12-31 2019-05-28 Hyosung Heavy Industries Corporation Vacuum interrupter and driving method therefor
US11152178B2 (en) * 2019-03-01 2021-10-19 Eaton Intelligent Power Limited Disconnect switches with combined actuators and related circuit breakers and methods

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3718108A1 (de) * 1987-05-27 1988-12-08 Slamecka Ernst Vakuumschalter
DE102018200450A1 (de) * 2018-01-12 2019-07-18 Siemens Aktiengesellschaft Vakuumschaltröhre

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210505A (en) * 1962-04-03 1965-10-05 Gen Electric Electrode structure for an electric circuit interrupter
US3211866A (en) * 1963-02-05 1965-10-12 Gen Electric Vacuum type electric circuit interrupter with plural parallel-connected contact points
US3261954A (en) * 1965-01-11 1966-07-19 Joslyn Mfg & Supply Co Current interruption and separation electrode structure for vacuum switching apparatu
US3283100A (en) * 1964-11-16 1966-11-01 Westinghouse Electric Corp Vacuum circuit interrupter with condensing shield serving as one of the main contacts
US3555223A (en) * 1968-01-03 1971-01-12 English Electric Co Ltd Vacuum circuit interrupters with co-axial movable main and movable auxillary contacts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210505A (en) * 1962-04-03 1965-10-05 Gen Electric Electrode structure for an electric circuit interrupter
US3211866A (en) * 1963-02-05 1965-10-12 Gen Electric Vacuum type electric circuit interrupter with plural parallel-connected contact points
US3283100A (en) * 1964-11-16 1966-11-01 Westinghouse Electric Corp Vacuum circuit interrupter with condensing shield serving as one of the main contacts
US3261954A (en) * 1965-01-11 1966-07-19 Joslyn Mfg & Supply Co Current interruption and separation electrode structure for vacuum switching apparatu
US3555223A (en) * 1968-01-03 1971-01-12 English Electric Co Ltd Vacuum circuit interrupters with co-axial movable main and movable auxillary contacts

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997748A (en) * 1975-06-23 1976-12-14 General Electric Company Vacuum interrupter with primary electrode surrounded by high dielectric strength shield
US4052576A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Contact structure for SF6 arc spinner
US4052577A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Magnetically driven ring arc runner for circuit interrupter
US4081640A (en) * 1976-04-19 1978-03-28 General Electric Company Compact vacuum switch for high voltage circuit interruption
US4234771A (en) * 1976-12-09 1980-11-18 Tokyo Shibaura Denki Kabushiki Kaisha Vacuum switch
US4847456A (en) * 1987-09-23 1989-07-11 Westinghouse Electric Corp. Vacuum circuit interrupter with axial magnetic arc transfer mechanism
FR2827075A1 (fr) * 2001-07-05 2003-01-10 Schneider Electric Ind Sa Appareillage electrique de coupure et de sectionnement comportant une ampoule sous vide
WO2003005394A1 (fr) * 2001-07-05 2003-01-16 Schneider Electric Industries Sas Appareillage electrique de coupure et de sectionnement comportant une ampoule sous vide
CN100530481C (zh) * 2007-06-05 2009-08-19 西安交通大学 一种252kV单断口真空灭弧室
EP2063442A1 (de) * 2007-11-20 2009-05-27 ABB Technology AG Leistungsschalter mit flexiblen Leitern
US10304644B2 (en) * 2014-12-31 2019-05-28 Hyosung Heavy Industries Corporation Vacuum interrupter and driving method therefor
US11152178B2 (en) * 2019-03-01 2021-10-19 Eaton Intelligent Power Limited Disconnect switches with combined actuators and related circuit breakers and methods

Also Published As

Publication number Publication date
AU8174375A (en) 1976-12-09
BR7504950A (pt) 1976-08-03
CA1036203A (en) 1978-08-08
ES438988A1 (es) 1977-02-16
CH591156A5 (de) 1977-09-15
SE395792B (sv) 1977-08-22
DE2536024A1 (de) 1976-03-04
JPS5145770A (de) 1976-04-19
SE7508494L (sv) 1976-02-23
GB1520922A (en) 1978-08-09
IT1041964B (it) 1980-01-10
JPS5910006B2 (ja) 1984-03-06
FR2282712A1 (fr) 1976-03-19

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