US3668350A - Vacuum type circuit interrupter - Google Patents

Vacuum type circuit interrupter Download PDF

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Publication number
US3668350A
US3668350A US808263A US3668350DA US3668350A US 3668350 A US3668350 A US 3668350A US 808263 A US808263 A US 808263A US 3668350D A US3668350D A US 3668350DA US 3668350 A US3668350 A US 3668350A
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United States
Prior art keywords
housing
extinguishing chamber
separator
arc extinguishing
chamber
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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
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US808263A
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English (en)
Inventor
Koichi Takeuchi
Takeo Okada
Shinichi Aoki
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • 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
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • 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
    • H01H33/662—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

Definitions

  • This invention relates to a vacuum circuit interrupter of the type comprising a metallic housing defining an arc extinguishing chamber, a pair of contacts, one stationary and one movable, disposed in the housing, and an electrical insulating chamber secured to at least one end of the arc extinguishing chamber.
  • the overall dimension is decreased because a very small distance of separation between the contacts permits the interrupter to withstand high voltages.
  • the interrupter Because of the high speed at which ions produced during switching are diffused and extinguished immediately after an interruption of current flow, the interrupter is rapidly restored to its insulating state to withstand any restriking voltage, thus ensuring that it can rapidly and effectively interrupt a high currentflowing therethrough while improving the reliability of the device.
  • Both of the contacts or electrodes are maintained in a clean state at all times and are capable of always engaging each other without oxidizing thereby permitting a high current to readily flow therethrough.
  • Vacuum circuit interrupters having the above cited advantages are described and claimed, for example, in US. Pat. Nos.. 3,280,286. 313L705, and 3.082.307.
  • Conventional vacuum circuit interrupters include an arc extinguishing chamber defined by a cylindrical metallic housing having a pair of contact members disposed therein, and an electrical insulator in the form ofa hollow cylinder disposed at one or both ends of the housing. It has been a common practice in the production of such devices to heat both the arc extin' guishing chamber and the insulator or insulators to the same temperature by a common heating device during the exhausting operation.
  • the components within the arc extinguishing chamber including the pair of contact members that is to say, those portions contacting the so-called interrupting arc, are raised to the highest temperature as compared to the remaining portions of the device.
  • the insulator providing an electrical insulating chamber should be maintained at a temperature fairly lower than the temperature at which the above-mentioned portions are heated because of its low thermal resistance.
  • a metallic vapor or vapors and scattered particles that may be formed within the arc extinguishing chamber can freely enter the associated insulating chamber to contaminate the latter.
  • the insulating chamber can be also heated to an elevated temperature principally due to the thermal radiation from the ill housing. Practically, the metallic housing has been precluded from being heated to an elevated temperature above a temperature up to which the insulating chamber is allowed to be heated.
  • the low melting-point metals are generally characterized by a decreased ability to withstand voltages. It is highly desirable to select the material and construction of a housing providing an arc extinguishing chamber so that the material is hardly affected with a vapor of such a low melting-point metal. It is also desirable to prevent deformation of the housing when it is subjected to a high vacuum at an elevated temperature.
  • a new and improved vacuum circuit interrupter including a hollow electrical insulator and a metallic housing providing an arc extinguishing chamber communicating with the interior of the insulator and capable of being heated to an elevated temperature to be exhausted to a high vacuum, thereby to increase the reliability of the interrupter.
  • a vacuum'circuit interrupter comprising a pair of switching contact members, and a metallic pair of contact members disposed therein, and providing an arc extinguishing chamber characterized in that the metallic housing has disposed at least one end an electrical insulator in the form of a hollow cylinder to form an exhausted envelope, and separator means are disposed within the arc extinguishing chamber to prevent overheating of the electrical insulator during the combined heating and exhausting operation and to protect the electrical insulator against an electric arc struck in the arc extinguishing chamber.
  • the separator means may be formed of stainless steel and .
  • the metallic housing may be formed of stainless steel.
  • the stainless steel may advantageously be a non-magnetic stainless steel of austenitic structure consisting of at least 10 percent by weight of chromium, at least 6 percent by weight of nickel and the balance iron except for very small amounts of incidental impurities.
  • the vacuum circuit interrupter may comprise a pair of switching contact members, two rods of electrically conductive material having the contact members carried respectively at their one ends, a cylindrical housing of stainless steel providing an arc extinguishing chamber and having the pair of contact members disposed therein, an apertured metallic plate fitted into at least one end of the cylindrical housing and welded to that end, an electrical insulator in the form of a hollow cylinder closed at one end and secured at the other end to the end plate, and an apertured separator plate of stainless steel secured to the end plate on that side facing the arc extinguishing chamber and having the contact rod loosely extending therethrough to form a gap therebetween substantially equal to a minimum distance corresponding to a predetermined voltage which the interrupter must withstand.
  • another separator plate of stainless steel may be advantageously mounted on that portion of the rod disposed in the arc extinguishing chamber with a gap between the outer periphery and the adjacent portion of the cylindrical housing substantially equal to a minimum distance corresponding to a predetermined voltage which the interrupter must withstand.
  • the invention provides a heating apparatus including first heating means for heating at least the electrical insulation, and second heating means for heating only the metallic housing to a temperature higher than a temperature to which the insulation is heated.
  • FIG. 1 is an elevational view, partly in longitudinal section of a vacuum circuit interrupter constructed in accordance with the principles of the invention
  • FIG. 2 is a view similar to FIG. 1 but illustrating a modification of the invention
  • FIG. 3 is a fragmental elevational view, partly in longitudinal section of another modification of the invention illustrating a stationary contact member and the associated components;
  • FIG. 4 is a fragmental elevational view, partly in longitudinal section of still another modification of the invention illustrating a movable contact member and the associated components;
  • FIG. 5 is a sectional view of a heating device for heating the vacuum circuit interrupters as illustrated in FIGS. 1 through 4 in accordance with the principles of the invention with the parts illustrated in elevation.
  • the arrangement disclosed herein comprises a circularly cylindrical housing of any suitable metallic material having a pair of end plates 12 and 13 of any suitable metallic material, each said end plate including a central aperture 14 and 15, respectively, and being closely fitted into an opposing end of the cylindrical housing 10 to form an arc extinguishing chamber generally designated by the reference numeral 16.
  • the housing 10 is preferably formed of stainless steel as described in the copending US. patent application Ser. No. 805,223 titled Vacuum Circuit Interrupter, filed on Mar. 7, 1969 by the same applicants and assigned to the same assignee as the present application.
  • the end plates 12 and 13 are preferably formed of the same material as the housing 10 and have a relatively large thickness and an outer surface substantially flush with respective end faces of the housing 10. The end plates 12 and 13 are then welded at their outer peripheral edges to the adjacent ends of the housing 10, respectively, thus ensuring a vacuum tight relationship between the housing and each of the end plates.
  • Metallic collars 20 and 21 each have one end portion fitted in vacuum tight relationship into the central aperture 14 and 15 on the end plates 12 and 13 respectively and the other end connected in vacuum tight relationship to one end of respective electrical insulators 22 and 23 in the form of hollow cylinders.
  • the insulators 22 and 23 may be composed of any suitable electrical insulating material such as glass or ceramic.
  • Apertured metallic covers 24 and 25 in the form of cups are connected in vacuum tight relationship to the other ends of the insulators 22 and 23 with their mouths facing the associated insulator.
  • the collars and covers are preferably of any suitable metallic material approximating in its coefficient of thermal expansion the material for the insulators and may be conveniently united with the respective insulators during the moulding of the latter.
  • the metallic collars, the insulators and the metallic covers are disposed coaxially with one another and with the housing 10 to form at both ends of the latter or of the arc extinguishing chamber 16 a pair of electrical insulating chambers communicating therewith and generally designated by the reference numerals 26 and 27 respectively.
  • the components l0, l2, 13, 20, 21, 22, 23, 24, and 25 form a closed envelope to be exhausted.
  • a metallic bellows 28 has one end fixed in vacuum tight relationship to one of the covers, in this example, the lower cover 25 and the other end extending into the associated insulator 23 and closed by a metallic end plate 30.
  • a stationary rod 32 of any suitable electrically conductive material is centrally extended and sealed through the upper cover 24 and then extended in coaxial relationship through the insulating chamber 26 until it reaches substantially the middle portion the arc extinguishing chamber 16.
  • the stationary rod 32 has a stationary contact member 34 carried at the free end located in the chamber 16.
  • a movable rod 33 of the same material as the stationary rod 32 centrally extends through the bellowsand lower insulating chamber 28 and 27 respectively into the arc extinguishing chamber 16 with the movable rod sealed through the end plate 30 of the bellows.
  • the movable rod 33 is precisely aligned with the stationary rod 32 and has carried at the free end a movable contact member 35 facing the stationary contact member 34 with a gap formed therebetween. In this way the contact members 34 and 35 are approximately centrally disposed within the arc extinguishing chamber 16.
  • Thecontacts 34 and 35 may be preferably of copper.
  • a partition or first separator member 36 of stainless steel in the form of an annulus is fixedly secured to the inner surface of the upper end plate 12 as by welding or brazing and a second shield member 38 of stainless steel in the form of a disc is preferably fixedly mounted on the stationary rod 32 between the first member 36 and the stationary contact member 34 for the purpose as will be apparent hereinafter.
  • Members 37 and 39 identical to the members 36 and 38 are operatively associated with the lower end plate and movable rod 13 and 33 respectively in the same manner as the members 36 and 38.
  • the second separator members 38 and 39 each have an outside diameter larger than both the diameter of the associated central aperture 14 or 15 on the end plates 12 and 13 and the inside diameter of the associated insulator 22 and 23, while the central apertures 14 and 15 each have a diameter smaller than the inside diameter of the associated insulators 22 and 23. Both the contact rods 32 and 33 loosely extend through the respective apertures on the first shield members 36 and 37 to form gaps therebetween.
  • an exhaust tube 44 is extended and sealed through one of the end plates, in the illustrated example, the upper end plate 12.
  • an operating mechanism (not shown) can be operated to move the movable contact rod 33 toward and away from the stationary contact rod 32 to put the movable contact 35 in engagement with and in disengagement from the stationary contact 34 respectively.
  • the are extinguishing chamber 16 provides a space serving terruption, and to prevent the contacts from fusing to each other as previously pointed out.
  • the low melting-point metals are characterized in that they are less in melting and to permit the expansion of an electric arc struck between the 5 boiling points and higher in vapor pressure than copper.
  • the particular low melting-point ing through the interrupter, and also to rapidly diffuse and metal included in either or both of the contacts is evaporated extinguish ions caused from the electric arc and left along the to provide a high vapor pressure when the contacts are heated arc ath after the current has reduced to zero, wher b h to an elevated temperature during the combined heating and dielectric strength of the chamber is rapidly restored to 10 aus i g ope n and/o h an e ec ic arc is complete he interrupting o eration. Thu it will be a established thereacross.
  • the arc extinguishing chamber is an essential generally apt to adhere to iron, nickel etc. and are also low in component governing the interrupting function of the vacuum their ability to withstand voltage. Therefore if such a low meltcircuit interrupter.
  • ing-point metal has adhered to any portion or portions of the Also, the insulating chambers 26 and 27 and particularly the housing member 10 and associated members such as the insulators 22 and 23 function to maintain the separated conseparator members 36, 37, 38, and 39, then this leads to a tact members 34 and 35 in an electrically insulated state.
  • each of the insulators 22 and 23 is designed and members 34 and 35 and therefore the contact rods 32 and 33 constructed so as to have a physical dimension providing a can be maintained in an electrically insulated condition from dielectric strength sufficient to withstand any high voltage apsuch a portion or portions having the vaporized metal plied across the contact members 34 and 35 by the associated deposited thereon. electric circuit.
  • the components defining the arc extinguishing chamber along with the contact members are required to be heated to or above a maximum temperature encountered in operation while the interrupter is exhausted for a long interval of time sufiicient to obtain a desired high vacuum.
  • the housing 10 formed of stainless steel can be maintained in its exhausted state at an elevated temperature for a long interval of time. It has been found also that in an atmosphere of a vacuum, even when heated to redness, stainless steels are high in mechanical strengths and, very low in oxidation susceptibility, while permitting only a very small amount of any gas t pass therethrough. Thus the housing 10 formed of stainless steel is allowed to be exhausted to a high vacuum at an elevated temperature for a long interval of time. Furthermore, it has been found that the optimum material for the housing 10 is a nonmagnetic stainless steel of austenitic structure consisting of at least 10 percent by weight of chromium, at least 6 percent by weight of nickel and the balance, iron except for very small amounts of incidental impurities.
  • separator members 36 through 39 are exposed to elevated temperatures and metallic vapors evolved in the arc extinguishing chamber in the combined heating operation and 1n the operation of the interrupter, they must be formed of stainless steel and preferably of a non-magnetic stainless steel of austenitic structure as previously described for the same reasons as previously described in conjunction with the material for the housing 10.
  • the separator members 36 through 39 function to shield the associated insulation 22 or 23 or insulating chamber 26 or 27 from thermal radiation originating from the arc extinguishing chamber 16 and to prevent any metallic vapor evolved in the chamber 16 from entering the insulating chamber 26 or 27. To this end, a"
  • each of the first separator members 36 or 37 and the associated contact rod 32 or 33 must provide the ability to withstand voltages as required for the interrupter. Also,
  • At least one of the distances between each of the first separator members 36 or 37 and the associated second separator member 38 or 39 and between each of the second members and the adjacent portion of the cylindrical housing must also provide the ability to withstand voltages as required for the interrupter. Moreover, such distances are required to be as small as possible. Further it is more efiective to dispose the first and second shield members within the arc extinguishing chamber 16.
  • the housing 10 composed of stainless steel may decrease in mechanical strengths and increase in gas permeability at elevated temperatures.
  • the housing 10 must have a thickness equal to or greater than 0.5 mm for the small-sized interrupters while the greater the outside diameter of the housing the largershould be a ratio of thickness to outside diameter.
  • the thickness T in mm and the outside diameter D in mm must hold the following relationship-
  • the outside diameter D is equal to or greater than 240 mm, D in each of the relationships (.l (2), and (3) should be replaced by value of 240.
  • an increase in thickness of the housing 10 above a certain limit causes an increase in cooling effect and therefore improvements in the interrupting capability of the resulting vacuum circuit interrupter.
  • the longitudinal axes of the stationary and movable contact rods 32 and 33 respectively are precisely aligned with each other and that the stationary and movable contactmembers 34 and 35 respectively have their opposing surfaces maintained in an exact parallel relationship, while these aligned and parallel relationships are effectively prevented from breaking down due to any deformation of the housing 10 that may occur during. the welding operation and during the combined heating and exhausting operation.
  • the internal surfaces of both end portions of the housing 10 are preliminarily mechanically formed to have their longitudinal axes precisely aligned with each other, and the end plates 12 and 13 are closely fitted into the formed end portions of the housing.
  • the outer peripheral edges of the end plates are preferably substantially flush with the adjacent ends 7 of the housing. Then the edges of the end plates are welded to the respective ends of the housing 10.
  • each of the end plates 12 and 13 supports its associated end of the housing 10 whereby the outer peripheral surface of the end plate bears the pressure of the ambient air applied externally to the housing.
  • the end plates 12 and 13 serve to reinforce the housing 10 preventing any deformation thereof.
  • the interior of the housing 10 can be heated to a higher temperature for exhaustion to a high vacuum.
  • the longitudinal axes of the stationary and movable contact rods 32 and 33 respectively are also precisely aligned with each other while at the same time the stationary and movable contact members 34 and 35 can be in good engagement with each other under a surface pressure uniformly distributed over the entire contacting surfaces thereof with the result that both the contact members 34 and 35 are prevented from fusing to each other.
  • the addition of a low melting-point metal to at least one of the contact members aids in preventing this fusing of the contact-members.
  • the bellows 28 is prevented from having a force applied along its longitudinal axis, which force would decrease its useful life. Also, at-
  • first separator members 36 and 37 similar to those shown in FIG. 1 are fixedly secured to each of cup-shaped end plates 12 and 13 at the inner bottom as by welding or brazing.
  • the end plates 12 and 13 cover each end of the cylindrical housing 10 with the mouth edges of the plates welded to the adjacent portions of the housing by welded joints 18 and 19.
  • the arrangement is identical to that illustrated in FIG. 1 except that the second separator members are omitted.
  • the housing 10 is provided at one end, for example the upper end, with an inner peripheral recess 44. Then, closel'y fitted into the enlarged end of the housing 10 is an apertured end plate 12 having an annular groove 46 on the exposed surface and an annular ridge 48 disposed outside the groove 46 on the same surface and contacted on the outer peripheral side by the internal surface of the end portion of the housing 10, with the extremity of the ridge substantially flush with the end of the housing.
  • the ridge 40 is sealed at the extremity to the end of the housing 10 by a welded joint 18.
  • a portion or a first separator member 36 fixed to the end plate 12 includes a hollow cylindrical portion 52 projecting into the associated insulating chamber 26 closed with a flat cover 24.
  • a second separator member 38 in the form of a cup is mounted on stationary rod 32 with the mouth of the cup directed to a stationary contact member 34. In other respects the arrangement is identical to the corresponding portion of the arrangement as illustrated in FIG. 1.
  • FIG. 4 An arrangement shown in FIG. 4 includes a housing 10 having an upper end portion 52 reduced in diameter into which an apertured end plate 12 in the form of a shallow cup is closely fitted with its bottom facing the interior of the housing.
  • the end plate 12 is welded at the mouth edge to the reduced end of the housing 10 by a welded joint 18 bridging the end of the housing and the edge of the plate substantially flush therewith.
  • the end plate 12 does not have a first shield member attached thereto. In other respects the arrangement is similar to that illustrated in FIG, 3.
  • the end portion of the housing may be enlarged in diameter.
  • the separator member has at least one portion extending radially of the longitudinal axis of the cylin' drical housing 10, unlike the conventional type of vacuum circuit interrupters including a separator member concentric with the associated exhausted housing.
  • the vacuum circuit interrupter according to the invention may be assembled in the manner as will be subsequently described with reference to FIG. 1.
  • the stationary contact member 34, the stationary rod 32, the second shield member 38, the first shield member 36, the end plate 12'with the exhaust tube 40, the metallic collar 20, the insulator 22 and the cup-shaped cover 24 are first connected to one another to form a stationary subassembly generally designated by reference numeral 60.
  • the longitudinal axis of the outer periphery of the end plate 12 is maintained in a precisely aligned relationship with respect'to the longitudinal axis of the rod 32, and also exactly at right angles to the contact surface of the stationary contact member 34 as previously described.
  • the corresponding components associated with the movable contact member 35 are similarly connected to one another to form a movable subassembly generally designated by the reference numeral 61.
  • the longitudinal axis of the-outer periphery of the end plate 13 is maintained in precisely aligned relationshipwith respect to the .longitudinal axis of the movable rod 33, and exactly at right angles to the contacting surface of the movable contact member 35.
  • the subassemblies 60 and 61 are united with the housing 10 by having the end plates.l2 and 13 closely fitted into the both end portions of the housing 10 with the outer peripheral edge of each plate substantially flush with the adjacent end of the housing. Those end portions have the respective internal surfaces preliminarily machined to have their longitudinal axes precisely aligned with each other and with the longitudinal axis of the housing 10. Then the end plates 12 and 13 are welded in vacuum tight relationship to the ends of the housing 10 at 18 and 19 respectively.
  • the interrupter as assembled includes the stationary and movable rods 32 and 33 having their longitudinal axes precisely aligned with each other and with the longitudinal axis of the housing 10, while at the same time the opposing surfaces of the contact members 34 and 35 are exactly parallel to each other and precisely at right angles to the common longitudinal axes of both the rods 32 and 33.
  • both the contact members are exactly centered with each other and can engage each other under a surface pressure uniformly distributed over the entire contacting surfaces thereof.
  • the end plates 12 and 13 closely fitted into the adjacent ends of the housing 10 are effective for preventing the latter from being deformed due to heat generated during the welding operation.
  • the internal cylindrical surfaces of at least both end portions of the housing are preferably formed as by machining to have their longitudinal axes precisely aligned with each other.
  • FIGS. 1 and 3 show the housings having been subjected to such machining operation.
  • the arrangement of FIG. 4 includes the housing 10 having one end portion 52 reduced to a smaller diameter for the same purpose.
  • FIG. 5 shows by way of example such a device.
  • the assembly is placed within a first heating device 62 including a gas burner or burners (not shown) for heating the entire body of the assembly.
  • a second heating device 64 such as a gas burner or burners is disposed around the housing 10 to heat the housing and the associated member alone.
  • the second heating device may be of the high frequency heating type.
  • the movable contact member 35 may be brought into engagement with the stationary contact member 34 and a high current may be caused to flow therethrough to generate heat due to the contact resistance across the contact memrs.
  • the housing 10 and the associated members can be heated to a temperature higher than a temperature at which the components forming the insulating chambers 18 and 19 are heated by the first heating device 62.
  • the shield members operate as previously described.
  • the exhaust tube 40 is connected to any suitable exhausting device, asfor example a vacuum pump (not shown), to exhaust the interior of the assembly until it reaches the desired degree of vacuumfl'hen the exhaust tube 40 disengages from the vacuum pump and is simultaneously closed in vacuum tight relationship, thus completing the vacuum circuit interrupter.
  • a vacuum pump not shown
  • a vacuum circuit interrupter comprising a pair of switching contact members, a metallic housing having said pair of contact members disposed therein and providing an arc extinguishing chamber, a hollow cylinder of electrical insulation material disposed outside of and connected to one end of said housing to extend axially therefrom and to provide an electrical insulating chamber, sealing means connected to said cylinder and housing to permit the volume within said cylinder and housing to be exhausted, radially extending separator means mounted within said arc extinguishing chamber to inhibit heat transfer from said extinguishing chamber to said insulating chamber and to shield said insulating chamber against an electric arc struck across said pair of contact members, and an apertured end plate fitted into and welded to one end of said metallic housing, wherein said separator means comprising a first apertured separator plate attached to said end plate within said are extinguishing chamber, an electrically conductive rod carrying one of said contact members and extending through said apertured separator plate, said rod being radially spaced from said apertured separator plate to

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  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
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US808263A 1969-03-18 1969-03-18 Vacuum type circuit interrupter Expired - Lifetime US3668350A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US80826369A 1969-03-18 1969-03-18
FR6907682A FR2038522A5 (enExample) 1969-03-18 1969-03-18
CH417369A CH486765A (de) 1969-03-18 1969-03-19 Vakuum-Stromschalter
DE19691913980 DE1913980B1 (de) 1969-03-18 1969-03-19 Vakuumschalter
GB09271/69A GB1271322A (en) 1969-03-18 1969-04-15 Vacuum circuit interrupter

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US3668350A true US3668350A (en) 1972-06-06

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US (1) US3668350A (enExample)
CH (1) CH486765A (enExample)
DE (1) DE1913980B1 (enExample)
FR (1) FR2038522A5 (enExample)
GB (1) GB1271322A (enExample)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996437A (en) * 1973-12-03 1976-12-07 Cutler-Hammer, Inc. Vacuum contactor for motor control and method of making
US4095069A (en) * 1976-02-23 1978-06-13 Westinghouse Electric Corp. Stainless-steel interrupter-head construction for circuit-interrupters continuously carrying high-value-amperage currents
US4216360A (en) * 1978-07-27 1980-08-05 Westinghouse Electric Corp. Low voltage vacuum switch with internal arcing shield
US4310736A (en) * 1969-03-18 1982-01-12 Mitsubishi Denki K.K. Vacuum circuit interrupter
US4351992A (en) * 1979-11-05 1982-09-28 General Electric Company High-potential testing of vacuum-type circuit interrupters
US20160104590A1 (en) * 2014-10-13 2016-04-14 Eaton Corporation Composite arc shields for vacuum interrupters and methods for forming same
US20220412533A1 (en) * 2020-04-13 2022-12-29 Mitsubishi Electric Corporation Heat dissipation structure, manufacturing method therefor, and vacuum valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048442A1 (de) * 1980-12-22 1982-07-22 Siemens AG, 1000 Berlin und 8000 München "vakuumschalter"

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US3082307A (en) * 1959-04-30 1963-03-19 Gen Electric Vacuum type circuit interrupter
US3163734A (en) * 1962-01-26 1964-12-29 Gen Electric Vacuum-type circuit interrupter with improved vapor-condensing shielding
US3231704A (en) * 1963-04-09 1966-01-25 Jennings Radio Mfg Corp Hermetically sealed switch with tubular dielectric portions united to a relatively larger metallic intermediate vapor condensing portion
US3355564A (en) * 1966-06-03 1967-11-28 John W Ranheim Vacuum-type circuit interrupter
US3372258A (en) * 1965-05-28 1968-03-05 Gen Electric Electric circuit interrupter of the vacuum type with arc-voltage control means for promoting arc transfer

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Publication number Priority date Publication date Assignee Title
US3178542A (en) * 1962-03-26 1965-04-13 Jennings Radio Mfg Corp Vacuum switch and internal shielding therefor
GB993987A (en) * 1963-04-30 1965-06-02 Ass Elect Ind Improvements relating to vacuum switches

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Publication number Priority date Publication date Assignee Title
US3082307A (en) * 1959-04-30 1963-03-19 Gen Electric Vacuum type circuit interrupter
US3163734A (en) * 1962-01-26 1964-12-29 Gen Electric Vacuum-type circuit interrupter with improved vapor-condensing shielding
US3231704A (en) * 1963-04-09 1966-01-25 Jennings Radio Mfg Corp Hermetically sealed switch with tubular dielectric portions united to a relatively larger metallic intermediate vapor condensing portion
US3372258A (en) * 1965-05-28 1968-03-05 Gen Electric Electric circuit interrupter of the vacuum type with arc-voltage control means for promoting arc transfer
US3355564A (en) * 1966-06-03 1967-11-28 John W Ranheim Vacuum-type circuit interrupter

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310736A (en) * 1969-03-18 1982-01-12 Mitsubishi Denki K.K. Vacuum circuit interrupter
US3996437A (en) * 1973-12-03 1976-12-07 Cutler-Hammer, Inc. Vacuum contactor for motor control and method of making
US4095069A (en) * 1976-02-23 1978-06-13 Westinghouse Electric Corp. Stainless-steel interrupter-head construction for circuit-interrupters continuously carrying high-value-amperage currents
US4216360A (en) * 1978-07-27 1980-08-05 Westinghouse Electric Corp. Low voltage vacuum switch with internal arcing shield
US4351992A (en) * 1979-11-05 1982-09-28 General Electric Company High-potential testing of vacuum-type circuit interrupters
US20160104590A1 (en) * 2014-10-13 2016-04-14 Eaton Corporation Composite arc shields for vacuum interrupters and methods for forming same
US9875869B2 (en) * 2014-10-13 2018-01-23 Eaton Corporation Composite arc shields for vacuum interrupters and methods for forming same
US10679806B2 (en) 2014-10-13 2020-06-09 Eaton Intelligent Power Limited Composite arc shields for vacuum interrupters and methods for forming same
US20220412533A1 (en) * 2020-04-13 2022-12-29 Mitsubishi Electric Corporation Heat dissipation structure, manufacturing method therefor, and vacuum valve
US12196389B2 (en) * 2020-04-13 2025-01-14 Mitsubishi Electric Corporation Heat dissipation structure, manufacturing method therefor, and vacuum valve

Also Published As

Publication number Publication date
GB1271322A (en) 1972-04-19
FR2038522A5 (enExample) 1971-01-08
CH486765A (de) 1970-02-28
DE1913980B1 (de) 1970-03-12

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