US3502834A - Vacuum recloser having lightweight,rugged skeletal housing - Google Patents

Vacuum recloser having lightweight,rugged skeletal housing Download PDF

Info

Publication number
US3502834A
US3502834A US567700A US3502834DA US3502834A US 3502834 A US3502834 A US 3502834A US 567700 A US567700 A US 567700A US 3502834D A US3502834D A US 3502834DA US 3502834 A US3502834 A US 3502834A
Authority
US
United States
Prior art keywords
opening
recloser
vacuum
column
line
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
US567700A
Other languages
English (en)
Inventor
Everett J Field
Arthur S Caswell
Eugene Gorin
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.)
ABB Inc USA
Original Assignee
ITE Imperial Corp
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
US case filed in Texas Western District Court litigation Critical https://portal.unifiedpatents.com/litigation/Texas%20Western%20District%20Court/case/6%3A21-cv-01001 Source: District Court Jurisdiction: Texas Western District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ITE Imperial Corp filed Critical ITE Imperial Corp
Application granted granted Critical
Publication of US3502834A publication Critical patent/US3502834A/en
Assigned to BROWN BOVERI ELECTRIC INC.; A CORP OF DE reassignment BROWN BOVERI ELECTRIC INC.; A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: I-T-E IMPERIAL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H2033/6667—Details concerning lever type driving rod arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/022—Details particular to three-phase circuit breakers

Definitions

  • a vacuum recloser device for multiphase systems including individual vacuum interrupters for each of the phases being protected and a skeletal housing for the device which is lightweight, yet sufliciently rugged to Withstand all operating and environmental requirements.
  • the instant invention is characterized by the provision of a vacuum recloser apparatus employing new concepts of materials, structures, mechanism, insulation and control in the vacuum interrupter field, for the purpose of exploiting the unique advantages of vacuum interrupters, as well as creating a distribution feeder protective device offering the benefits of higher capacity, faster circuit interruption, more pleasing appearance, greater durability, freedom from maintenance, more flexibility of adjustment to meet different application requirements, ease of adjustment, direct trip and a number of fail-safe features.
  • the instant invention is comprised of a three-phase vacuum interrupter apparatus comprising interrupters for each of the phases which are of the high-power vacuum type.
  • interrupters are characterized by butt-type contacts which, in the fully disengaged position,'separate by a very short distance. Any are formed during the interruption operation within the ultra high vacuum environment is not sustained due to the absence of an ionized path, and hence are extinction usually occurs within the first current zero, following contact separation.
  • the closing mechanism for operating the vacuum interrupfers to the closed position is small and compact, an advantageous design feature which is permissible due to United States Patent the interrupters short gap in the disengaged position.
  • a ratcheting mechanism which is driven by a high initial torque, universal A.C.-D.C. motor, functions to charge a set of closing springs which are latched in the charged position.
  • An electrical trip solenoid releases the charged closing springs upon receipt of the appropriate signal, to drive a cam and linkages that simultaneously close the contacts of the vacuum interrupters and automatically charge a set of interrupter opening springs.
  • a second mechanical latch locks the mechanism in a contacts closed position.
  • the advantageous feature of the closing mechanism is that the only thing required to close the recloser apparatus is a means of releasing the closing latch. The closing function, however, is independent of whether or not power exists at the charging motor.
  • the closing mechanism further incorporates a control relay which includes a limit switch operative to the closed position for energizing the motor circuit upon the completion of the contacts closing stroke, thereby immediately recharging the closing springs within an interval of about one second.
  • the limit switch is sensitive to the charged or discharged condition of the closing springs, not to the position of the interrupter contacts.
  • a second pair of limit switch contacts opens the circuit to the closing latch release solenoid.
  • the second feature of the control relay is provided by a coil energized by a third set of limit switch contacts. This coil is sealed in by one set of contacts which it operates and opens the closing solenoid circuit with another set of contacts. This provides an antipump feature in the event that a fault persists, and for any reason a normal switching circuit to the closing solenoid becomes sealed.
  • the oepning springs are designed to be charged by a transfer of energy from the deenergization of the closing springs.
  • the opening springs are in two sets, both of which contribute to the opening operation, but each of which independently serves a particular function.
  • a first set of opening springs is mounted above the closing mechanism and connected to a main operating arm for urging the arm in a direction opposite that of the closing springs to drive the contacts firmly into engagement.
  • a trip operation may be initiated either by means of a mechanical pushbutton or a conventional electrical control switch.
  • a magnetic latch is employed as the high speed tripping device.
  • the magnetic latch has a high and a low reluctance path and a control coil.
  • the armature in contact with fixed pole pieces, comprises the low reluctance path.
  • a core and an air gap in series with the control coil comprise the high reluctance path.
  • a pulse of current through the coil momentarily converts the high reluctance path to a lower reluctance that causes flux to shift from the low reluctance path.
  • the shift in flux from the armature of the tripping latch reduces the holding torque thus releasing the latch and permitting opening of the coil to initiate a tripping operation.
  • Special bushing current transformers called sensors supply the current pulse. When line fault current exceeds a predetermined value the sensor secondary voltage causes a flux shift to release the armature and hence the charged closing springs releasing a mechanical latch.
  • the recloser bushings are air filled, high strength, alumina porcelain.
  • An aluminum (or other metal) flange and grounding shield are epoxy cemented to a portion of the external cylindrical portion. Sensors mount over the ground shield. Alternate construction is for a metallized porcelain surface to provide the ground shield.
  • Terminals may be either eye-bolt type or standard threaded studs to take selected standard terminals.
  • the vacuum interrupters are mounted directly between the inside bushing terminals using high conductivity formed metal brackets. Special attention to the current-carrying path on the moving contact end provides electro-magnetic forces that tend to increase rather than decrease contact force during flow of fault current. Also, parallel solid links bridge from stationary bracket to moving contact to eliminate flexible connectors (Braid). By means of a coined spherical protrusion and a mating conical indentation, current transfer is across an annular contact ring that permits relative motion of mating parts. There are two current paths per interrupter and electromagnetic forces on the links tend to increase contact pressure of the links during fault current flow.
  • Control and intelligence in response to fault conditions are provided by an electronic, solid state control that determines open interval duration, number of open intervals, dual time/current characteristic and final lockout.
  • This control is equipped with calibrated dials permitting adjustment to published values and accuracies of any one of the following operating characteristics:
  • All of the above adjustments are controllable by means of manually operable knobs mounted upon a single panel behind a door that can be locked for access only by authorized personnel.
  • Three manually operated switches are accessible to any operating personnel and provide for reclose after lockout, local trip, ground trip and a safety lockout or non-automatic setting to defeat the control programming and cause lockout after one opening response to a fault.
  • the control is compact and may be readily removed by removal of fastening members and disconnecting a standard, multipin military-type connector.
  • the control mechanism includes redundant circuits to provide for fail-safe operation and all switching modes are make rather than break for the same reason.
  • the housing for the recloser apparatus presents a vast departure from conventional practice.
  • the basic concept is to provide a skeletal supporting frame fulfilling all of the mechanical functions of support for the functional components of the apparatus. This permits environmental protective functions to be provided independently.
  • the skeletal structure supports a sheet-metal barrier which compartmentalizes the housing as well as isolating the interrupting compartment from the control compartment.
  • the supporting structure supports the components described above as well as furnishing a foundation for terminal blocks, electronic control, auxiliary switches, and a conduit for incoming power and remote control leads.
  • the skeletal frame serves as a pedestal during manufacturing and handling prior to installation as well as providing suitable attachment means to a floating substation pad at the final site.
  • Durable, light-weight plastic housings are seated in gasketed grooves of this skeletal frame, and hang upon the main structure like a suit of clothes and serve only the function of environmental protection.
  • the housings are preferably fabricated from glass fiber reinforced resin such as polyester with color pigment mixed in the resin prior to curing to provide full depth, life-time color.
  • All framing 4 members are preferably formed of aluminum to share the life-time maintenance-free characteristics of the housings.
  • Another object of the instant invention is to provide a novel vacuum recloser apparatus for three phase systems, and the like, comprising individual vacuum interrupters for each of the phases being protected.
  • Another object of the instant invention is to provide a novel vacuum recloser apparatus having an operating mechanism and linkages of low moving mass for performing the opening and closing operations so as to permit high speed operation and to avoid substantial tilting forces to be imparted to the supporting structure.
  • Another object of the instant invention is to provide a novel recloser apparatus for multiphase systems, and the like, having means for :charging the closing springs and latch means for locking the closing springs into the charged position to permit performance of a closing operation in the absence of control power.
  • Another object of the instant invention is to provide a novel recloser apparatus for multiphase systems, and the like, comprising separate opening and closing springs wherein the discharging of the closing springs automatically charges the opening springs and actuates the latch to hold the opening springs in the charged position.
  • Another object of the instant invention is to provide a novel recloser apparatus for multiphase systems, and the like, comprising separate opening and closing springs wherein the discharging of the closing springs automatically charges the opening springs and actuates the latch to hold the opening springs in the charged position, and wherein the opening springs are further comprised of a first set of spring members operative during the closing operation to substantially reduce contact bounce and to maintain contact pressure, and further performing the function of immediately imparting high velocity movement to the cooperating contact of the vacuum interrupters during an opening operation while the second set of operating spring members maintains contact velocity already established by the main contact pressure and accelerating opening spring members.
  • Another object of the instant invention is to provide vacuum recloser means for multiphase systems, and the like, comprising a novel skeletal housing for the apparatus which is light-Weight and yet sufiiciently rugged to withstand all operating and environmental requirements.
  • Another object of the instant invention is to provide novel vacuum recloser means for use in multiphase systems, and the like, comprising vacuum interrupters for each of the phases being protected being mounted between a pair of bushings aligned transverse to the vacuum interrupters and further comprising an operating mechanism designed to substantially reduce cantilever forces imposed upon the mounting bushings during operation of the recloser means.
  • Another object of the instant invention is to provide novel vacuum recloser means for use in multiphase systems, and the like, comprising magnetic latch means for performing instantaneous tripping operations and including current-sensing devices mounted about the bushings supporting each vacuum interrupter for the purpose of shifting flux within the magnetic latch in order to initiatean instantaneous tripping operation when line fault current exceeds a predetermined threshold level.
  • Still another object of the instant invention is to provide novel vacuum recloser means for use in multiphase systems, and the like, comprising solid state circuitry for selectively operating the recloser mechanism to control the number of trips to lock out the time delay character istic curve of opera ion, the number of total trips that will be fast or slow, the minimum pickup sensitivity of each phase, the duration of each open interval and the reset time of the apparatus.
  • FIGURE 1 is a perspective view of the vacuum recloser apparatus embodying the principles of the instant invention and showing the upper housing removed, and the lower housing as being substantially invisible in order to better display the components housed therein.
  • FIGURES 2 and 2a are front and side elevational views of the vacuum recloser apparatus of FIGURE 1.
  • FIGURE 3 is an elevational view of the vacuum recloser apparatus of FIGURE 1 showing one vacuum interrupter and the linkage between the interrupter and the operating mechanism in greater detail.
  • FIGURE 4 is an elevational view of the vacuum recloser apparatus of FIGURES 1 and 2 showing the opening springs and magnetic latch apparatus in greater detail.
  • FIGURE 4a is a front view of the operating mechanism of FIGURE 4.
  • FIGURE 4b is a rear view of the apparatus of FIG- URE 4.
  • FIGURE 5a is an end view showing one vacuum interrupter and the local operating linkages therefor in greater detail.
  • FIGURE 5b is a view of the interrupter assembly of FIGURE 5a looking in the direction of line AA of FIGURE 5a.
  • FIGURE 5c is an end view showing the arrangement of FIGURE 5a with the contacts open.
  • FIGURE 6 is a partially sectionalized side view of one of the bushings of the vacuum recloser apparatus of FIGURES 1 and 2.
  • FIGURE 6a is a top view of the bushing of FIG- URE 6.
  • FIGURES 6b and 6c are partial views of the connecting terminal end of the bushing of FIGURE 6 showing alternative terminal connections which may be employed with the bushing.
  • FIGURES 1 and 2a there is shown therein a vacuum recloser apparatus 10 supported by a skeletal structure which is a welded assembly preferably formed of aluminum members.
  • the pedestal consists of two bent angles 12 and 13 bolted to vertical column 17 to form an X- shape in plan view.
  • Each of the angles 12 and 13 is provided with a pair of vertical clip angles 12a and 13a which provide a solid grip on all four sides of vertical column. In this way efiicient connection is accomplished which insures maximum rigidity in all directions.
  • the pedestal is predrilled such as shown at 12b to accept anchor bolts for permanent assembly on concrete footmg.
  • the horizontal frame is preferably a welded assembly (see FIGURE 2) and consists of: Two joist-s channels 19 spaced toward center by a pair of short channels 18, all of which are framed by closed loop member 20 which is an H-shaped extrusion.
  • Sheet metal floor 21 rests upon the top of channels 18 and 19 and halfway between H- shaped extrusion 20.
  • This assembly 20 forms a pair of horizontal grooved tracks 20a and 20d for nesting the upper and lower shells 24b and 24] respectively.
  • Floor 21 acts as a metal barrier between the upper and lower compartments.
  • the upper end of square column 17 is sandwiched between a pair of short channels 18 and is preferably welded to these members.
  • the upper compartment houses high voltage equipment (interrupting unit 55) supporting hardware and leverages as well as insulating control rods 99 which couple interrupting units with the operating mechanism 200 located in the lower compartment.
  • the lower compartment houses the operating mechanism 200 and low voltage control equipment 190.
  • the skeletal structure further comprises two arches 22 and 23, the elements of which lie in substantially vertical planes.
  • Each of the arches 22 and 23 are formed of two substantially vertically aligned sections such as, for example, the sections 23a and 23b of FIGURES 1 and 2a which support a horizontally aligned section 230 by means of two diagonally aligned sections 23d and 23a, respectively.
  • the components 23a-23e are preferably welded to one another.
  • a channel reinforced cover member 24 is rigidly secured to the elements 220 and 23c, respectively, of the arches 22 and 23.
  • Cover plate 24 is substantially a fiat member having a flange 24a surrounding its periphery.
  • a pair of channels 25 (only one of which is shown in FIGURES 2 and 2a) have the free ends of the channel arms preferably welded to the underside of cover member 24.
  • the channels 25 are substantially in alignment with the elements 220 and 230, respectively, and are rigidly bolted thereto by the fastening members 26.
  • the components 220 and 23c each receive a U- shaped pin 27 and 28 which are threadedly engaged at the lower ends of their arms so as to threadedly engage the fastening nut 29 below members 220 and 23c to transmit lifting forces directly to the skeletal frame.
  • the U-shaped members 27 and 28 permit the entire structure to be lifted for transportation or assembly purposes, both as regards the assembly of the structure itself as well as the assembly of the structure on a site.
  • the cover 24 is provided with a plurality of openings suflicient in number to receive the pairs of terminal bushings which are provided for coupling the recloser apparatus to the multiphase system being protected as well as providing the electrical connection and mechanical support for the vacuum switches to be more fully described.
  • the enclosure 24b having a substantially rectangular configuration and being curved near the corners, has its upper marginal edge positioned beneath the flange 24a of cover 24.
  • Enclosure 24b is preferably formed of a suitable insulating material.
  • the lower marginal edge of enclosure 24b is positioned within the upper curve 20a of closed loop member 20 and is seated upon a gasket 20c positioned therein so as to provide a suitable water tight seal.
  • a flat gasket 240 is provided for similarpurposes and is positioned between the upper marginal edge of enclosure 24b and the underside of cover plate 24.
  • Enclosure 24b is provided with a removable cover plate 24d mounted by fastening means 24e for the purpose of gaining access to the interior of the upper compartment which is defined by barrier wall 21 in closure 24b and cover plate 24.
  • a substantially shell-shaped enclosure 24 is provided for enclosing the recloser electronics and the recloser operating mechanism designated generally by the numeral 2.00.
  • Lower enclosure 24 has its upper marginal edge seated within the curve 20d of closed loop member 20 and bears against a gasket 202 for purposes of weatherproof sealing.
  • Enclosure 24 is provided with a suitable opening 24g for receiving the column 17 therethrough.
  • Column 17 is provided with a mounting plate 17a which secures lower enclosure 24] to the structure by fastening means 17c.
  • a removable panel 193 is provided along one surface of lower enclosure 24 and is removably secured thereto by fastening means 193a to permit ready access to the lower compartment interior generally defined by enclosure 24 and barrier wall 21.
  • the structural design of the recloser apparatus is such that the enclosing members are extremely lightweight in that their major function is protection of the recloser structure against the elements. All of the supporting strength for the recloser structure is completely divorced from the enclosure members 24b and 24 The strength of the supporting structure is such as to permit swift, efiicient assembly at a job site by lifting the recloser structure by means of U-bolt 27. This overall supporting and weather protecting structure permits a relatively lightweight and yet superior strength apparatus.
  • the bushing 29 of FIGURE 2 is comprised of a main insulating portion 30 through which extends a conductor rod 31 having upper and lower threaded ends 31 and 32, respectively.
  • the bushing is provided with a ledge 33 intermediate the ends thereof for resting upon the surface of a flange 34 provided on collar 35.
  • Collar 35 is a hollow tubular member which is inserted into opening 24b and is secured thereto by fastening means 36.
  • the portion of the insulator member 30 contained within collar 35 is secured to collar 35 by filling the intermediate space with an epoxy 37 so as to rigidly hold the terminal bushing to collar 35 and hence to cover member 24. It should be understood that all of the remaining bushings are secured to cover member 24 in a similar manner.
  • FIGURES 66c show one bushing in greater detail.
  • collar flange 34 is provided with three equally spaced openings 34a-34c for receiving fastening means of the type designated by numeral 36 in FIGURE 2 for securement to cover member 24.
  • the space between the upper surface of collar flange 34 and the ledge provided in insulator portion 30 is occupied by a relatively thin gasket 38 for the purpose of adequately sealing this region from entering into the housing of the recloser apparatus.
  • the insulator body 30 receives an elongated threaded member having an upper end 31 and a lower end 32.
  • the lower end 32 of the threaded member threadedly engages a nut 39 which is tightened sufficiently to compress a fiber washer 40 and a metallic washer 41 between the lower edge of the insulator body and the fastening nut 39.
  • the upper end 31 of the threaded member is threadedly engaged by a compression nut 42 which is tightened so as to satisfactorily compress a rubber washer 43 between the fastening nut 42 and the top of the insulator body 30.
  • the stud terminal adapter of FIGURE 6b may be employed.
  • the upper end of threaded member 31 receives a stud terminal adapter 44 having a flange portion 440 which bears against the upper end of the insulator body 50.
  • a threaded portion 33 is integrally formed with the stud terminal adapter 32 and is provided with a diameter suitable for coupling to a connecting'element (not shown), thereby enabling adaption of the recloser apparatus to a connecting component of dissimilar diameter.
  • FIGURE 60 A still further modification is shown in FIGURE 60 wherein a connector 46 threadedly engages the upper end 31 of the threaded member and is tightened sufliciently to compress a sealing gasket 47.
  • the connector 46 is provided with an eyebolt 48 the threaded end of which 49a passes through an opening (not shown) in connection 46 so that its free threaded end 49a may be moved in a direction shown by arrow 51 so as to tighten any electrical conductor inserted into the opening in eyelet 48 by causing it to bear against the arcuate edge 52 provided along the lower edge of connector 46, as it is shown in FIG- URE 60.
  • FIGURE 2 shows the manner in which a vacuum switch 55 is secured to a pair of terminal bushings 29 and 29'.
  • FIGURES a and 5b are detailed views showing the construction of a typical vacuum switch 55.
  • the vacuum switch is comprised of an insulating vacuum envelope 56 containing a pair of electrical contacts 57 and 58.
  • Electrical contact 58 is coupled physically and electrically to a conductive rod 59 which passes through a suitable opening in the insulating vacuum opening, forming a stationary electrical terminal 60.
  • Contact 57 is coupled to a relatively movable conductive rod 61 whose left-hand end 61a for-ms the movable electrical terminal.
  • An elfective vacuum seal is maintained in the presence of the movable terminal 61 by means of a flexible metallic bellows assembly 62 which is free to expand or contract, depending upon the position of the terminal 61.
  • the interior region 56a of the envelope 56 is vacuumized so that separation of the contacts 57 and 58, which normally causes arcing, will not sustain an are due to the effective lack of ionizable material Within the vacuum chamber. As is well known in the vacuum interrupter art, the arc is extinguished when the current crosses the zero axis.
  • the vacuum switch is provided with a mounting plate 63 having two integrally formed threaded members 64 and 65 for coupling an operating assembly thereto.
  • the operating assembly 66 is comprised of a supporting bracket 67 having a substantially J-shaped configuration with its shorter arm 68 being provided wit-h suitable aper tures (not shown) for receiving threaded members 64 and 65 to secure supporting bracket 67 to the front mounting plate 63. Securement is completed by means of the lock washers 66a and 66b, respectively.
  • the long arm 69 of supporting bracket 67 is provided with a suitable opening for receiving a bolt 70 which threadedly engages a threaded collar 71 suitably secured by welding or other means to a stationary contact block 72.
  • the stationary contact block 72 is sandwiched between the front mounting plate 63 and long arm 69 and is rigidly secured to long arm 69 by the bolt 73.
  • Contact block 72 is provided with a pair of depressions 72a and 72b on opposite sides thereof which are designed to seat suitable protrusions 74a and 75a provided near the lower ends of a pair of movable contact links 74 and 75, respectively.
  • the movable contact links are further provided with a pair of protrusions 74b and 75b near the upper ends thereof, which are seated within cooperating depressions 76a and 76b, respectively, provided in contact rod block 76.
  • Contact rod block 76 is provided with a suitable aperture for receiving the threaded end 61a of the movable electrical terminal and is keyed to the terminal by means of a resilient thread-lock formed by means of a tapped aperture 76c vertically aligned in contact rod block 76 which threadedly engages a locking or set screw 77 for firmly keying block 76 to the movable electrical terminal 61a.
  • a hexagonal nut 78 threadedly engages the forward end of terminal 61a and is provided with a smaller threaded opening for receiving the threaded end of a contact rod head 79 which is free to pass through an opening 69b in long arm 69 of supporting bracket 67 for the purpose of coupling the vacuum switch operating assembly to the recloser operating mechanism, in a manner to be more fully described.
  • the coupling is made by virtue of an opening 79a provided in contact rod head 79 for receiving a pin member to couple the rod head to an L-arm 80, shown in FIGURE 2, and to be more fully described.
  • the pair of movable contact links 74 and 75 are maintained seated within the depressions previously mentioned in blocks 72 and 76 by means of a spring biased fastening assembly comprised of bolt 81 passing through suitable apertures in contact links 74 and 75 and threadedly engaging a nut 82 which is sufficiently tightened to place a spring member 83 under compression.
  • Spring member 83 bears against the outside surface of movable contact link 74 and against washer 84 causing the contact links 74 and 75 to be urged toward one another.
  • FIGURE 2 shows a stationary electrical terminal 60 coupled to a connector 85 of a type; similar to the connector 46, shown in FIGURE 6c.
  • the connector 85 is comprised of a substantially U-shaped bracket 86 secured to the lower end 32' of an elongated threaded rod by means of fastening members 87 and 88 mounted on opposite sides of bracket 86 which is provided with an opening sufficient to receive lower end 32'.
  • U-shaped bracket 86 is provided with an opening suitable for receiving a threaded member 89 secured by a fastening nut 90 for the purpose of drawing a substantially U-shaped clamp 91 upwardly against bracket 86 in order to firmly embrace the stationary terminal 60 therebetween and establish a good electrical contact.
  • the movable contact (see FIGURE 3) is mechanically coupled through contact rod head 79 to the L-shaped arm 80 which is a pivotal connection secured by pin means 92.
  • the vacuum interrupter supporting bracket 67 is secured to terminal bushing 29 by means of an L-shaped bracket 93 secured to threaded end 32 of the terminal bushing by means of nuts 94 and 95 which are tightened to a sufficient degree.
  • the lowermost end of threaded portion 32 also threadedly engages supporting bracket 67 through a threaded opening 67a shown best in FIGURE a.
  • the vertically aligned arm of the L-bracket 93 is also fastened to supporting bracket 67 by fastening means 94.
  • L-shaped bracket 93 is provided with a projection 95 extending outwardly therefrom, which projection 95 is preferably a solid block having an opening or slit 95a (see FIGURE 2a) for pivotally coupling L-shaped arm 80 by means of a pivot pin 96. This permits arm 80 to pivot either in the clockwise or counterclockwise direction about pin 96.
  • the opposite end of arm 80 is coupled by a pin 97 to a coupling terminal 98 secured to an insulating rod 99.
  • the lower end of insulating rod 99 is provided with a second end coupling 100 having a downwardly projecting portion 100b.
  • a collar 101 is reciprocally mounted upon projection 100d.
  • the lower end of projection 100d threadedly engages a nut 105 above which is positioned a washer member 106.
  • Washer 106 acts as the support for the lower end of a spring member 107, the upper end of which bears against the lower edge of collar 101 during operation of the recloser in a manner to be more fully described.
  • Collar 101 is provided with two projecting pins 101a and 101b which pivotally couple collar 101 to lever arm 102, as can best be seen in FIGURE 20.
  • Lever arm 102 pivots about a shaft 103 which is secured near its ends by a pair of L-brackets 103a, only one of which is shown in FIGURES 2 and 2a.
  • Lever arm 102 is rigidly coupled to shaft 103 so as to be rotated in unison therewith.
  • shaft 103 is rigidly coupled to a second lever arm 108 which imparts rotation to shaft 103 in a manner to be more fully described.
  • lever arm 108 is pivotally connected by means of pin 143 to connecting lever 118 and connecting lever 142, respectively. This arrangement is shown in greater detail in FIGURES 4 and 4b.
  • connecting lever 118 is pivotally connected to pin means 119 which is secured at opposite ends thereof by suitable cotter pins 134a and 134d.
  • the connecting arm 118 actually constitutes a pair of arms both of which are coupled at a first end to pin 143 and at its second end to pin 119.
  • a rotatable lever 112 which is designed to pivot about 147, is likewise coupled to pin 119 at a point intermediate its ends.'Ihe upper end of rotatable lever 112 has a roller attached. The roller strikes the head of adjustment bolt 131a anchored by jamb nut 130 to piston arm 131.
  • piston arm 131 The forward end of piston arm 131 is coupled to piston 132, shown in dotted fashion, which piston is reciprocally mounted within piston chamber 133.
  • the piston and piston chamber serve as a buffer means which is operated near the end of a contact opening stroke in order to absorb some of the impact of the opening stroke.
  • the pin 119 as can best be seen in FIGURES 4 and 4b has pivotally coupled thereto three opening spring connecting elements 113a-113c which act to couple the forward end of three opening spring members 120-122, respectively, to the rotatable lever 112,
  • rotatable lever 112 is actually comprised of a pair of lever arms 112a and 112b, the upper end thereof receives pin 129 therebetween which serves to mount a flat plate 129a which, in turn, is threadedly engaged to the threaded portion 131a of piston rod 131.
  • each opening spring -122 is provided with a spring connecting means 113d-113f, respectively, similar to the connecting means 113a-113c, respectively, for the purpose of mounting the reward ends of the spring to a stationary rod 128.
  • Rod 128 is held in the stationary position by a pair of substantially L-shaped brackets and 126 which are secured by suitable fastening means such as, for example, fastening means 148 to the housing 149 of the recloser operating mechanism.
  • the L-brackets 125 and 126 are provided with a plurality of holes 126a-126c to provide for tensio-ning adjustments of the opening springs 120-122.
  • FIGURE 4 shows the opening springs in the charged position preparatory to an opening operation.
  • the charged springs upon release of a mechanism latch means to be more fully described, will drive the rotatable lever 112 clockwise about its pivot 147 to initiate the opening stroke, in a manner to be more fully described.
  • the rotatable lever arms 112a and 112b are further provided with a pair of suitable openings for receiving pin means 129, shown best in FIGURE 4b.
  • Pin means 129 also passes through a suitable aperture provided at the upper end of an operating arm 150 which is mounted to pivot about shaft 147.
  • Pin means 129 also pivotally couples a reciprocating arm 152 having a projection 152a which is bent at right angles to the main body of reciprocating arm 152.
  • the free end of the projection 152a is provided with an opening 152b for receiving one end of a wire 153, the opposite end of which 153a is coupled to a leaf-spring 154 for the purpose of driving a mechanical counter 155 to provide a cumulative count of the number of closing operations experienced by the recloser mechanism.
  • the operation is such that a closing operation drives the rotatable lever 112 counterclockwise about shaft 147.
  • Reciprocating lever 152 is thereby driven in the direction shown by arrow 156 of FIGURE 4, causing wire 153 to be driven generally in the same direction. This is sufficient to pull leaf-spring 154 in the same general direction to cause the count in mechanical counter 155 to be increased by one each time a closing operation is performed.
  • the reading on counter 155 appears in window 155a, shown arranged along the front face or cover 156 of the recloser operating mechanism.
  • Pin means 143 pivotally connects with a connecting lever 142, the lower end of which is pivotally coupled to U-shaped lever 140 by means of a substantially L-shaped rod 141.
  • L-shaped rod 141 passes through two suitable openings provided near the base portion 140a of U-shaped rod 140.
  • the downwardly depending section passes through a suitable opening in leaf-spring 158 which extends generally in the horizontal direction.
  • the opposite end of leaf-spring 158 is secured within two cooperating slots 159 (only one of which is shown in FIGURE 4b) of a hollow cylinder 160.
  • the right-hand end of cylinder 160 is rigidly secured to shaft 161 which, in turn, is coupled to the armature 162 of a flux shifting device 157.
  • L-shaped rod 141 is threaded at 141a to receive a fastening nut 145 which supports a hollow cylinder or collar 146.
  • the recloser device In the position shown in FIGURE 4, the recloser device is in the opened position. In the closed position, the L-shaped rod 141 is lifted substantially vertically upward as shown by arrow 164, causing the flange 146a of collar 146 to urge leaf-spring 158 vertically upwardly to the dotted line position 158'.
  • the right-hand end of leaf-spring 158 (relative to FIGURE 4) is unable to rotate clockwise about shaft 161 due to the fact that the armature 162 connected thereto is magnetically sealed in this position by means of a magnetic member (not shown).
  • the armature Upon the occurrence of a closing operation, the armature is reset by pin means 144 secured to L-shaped rod 141 which drives leaf-spring 158 downwardly so as to set it in the solid line position shown in FIGURE 4 in readiness for another high-speed tripping operation.
  • the rotating lever assembly 112 is operated between the contact open and contact closed position by means of operating arm 150 which is rigidly secured to cam member 164 by any suitable fastening means.
  • Cam member 164 is provided with a cam surface 164a which slidably engages a roller member for the purpose of driving cam member 164, operating arm 150 and rotatable lever arms 112a and 112b in the counterclockwise direction about shaft 147, as shown in FIGURE 4.
  • suitable latch means are provided for the purpose of latching or locking the cam member 164 and hence the recloser contacts in the closed position so as to prevent opening springs 120 122 to assume control over rotatable levers 112a and 11% and thereby erroneously performing an opening operation immediately subsequent to the completion of a closing operation.
  • Such latch means is identified by numeral 102, shown in FIG- URE 5 of the above mentioned Patent No. 2,937,258.
  • the fully charged opening springs 120-122 are capable of immediately assuming control over rotatable lever 112 to initiate a highspeed opening operation.
  • the buffer mechanism 133 is capable of absorbing most of the impact near the end of both an opening stroke and a closing stroke as the piston member 132 approaches the lefthand and right-hand ends, respectively, of the piston chamber 133.
  • the previously mentioned latch (not shown herein) is tripped by either manual or local electric means, or remote electrical means to initiate the closing operation. Any one of these three operations releases the latch causing the closing springs to drive cam member 164, operating arm and rotatable lever 112 counterclockwise from the solid line position shown in FIGURE 3 to the dotted line position 112'.
  • This causes the connecting levers 118 to be moved in the direction shown by arrow 156 in FIGURE 4, from the position of FIGURE 4 to the solid line position of FIGURE 3.
  • the movement of connecting lever 118 in the direction of arrow 156 drives lever arm 108 clockwise about jack shaft 103, causing jack shaft 103 to likewise rotate clockwise about its longitudinal axis.
  • the second lever a-rm 102 which is rigidly secured to jack shaft 103 is driven clockwise about the jack shaft, causing the collar 101 to be moved substantially in the downward vertical direction, as shown by arrow 170, causing the collar to be driven into engagement with the upper end of spring means 107.
  • This spring means has a substantially high spring constant causing the opposite end of spring means 107 to urge washer member 106 and ultimately the insulating rod 99 in the direction shown by arrow well before spring means 107 becomes fully compressed.
  • a current path is established through conductive rod 32' of insulator 29' to stationary electrical terminal 60, contact 58, contact 57, movable electrical terminal 61a, conductive block 76 (see FIGURES 5a and 5b), current-carrying links 74 and 75, conductive block 72 and conductive bracket 67 to the conductive rod 31 of the insulator assembly 29.
  • the main current path through the movable contact linkage is shown by the phantom line 173.
  • a secondary current path also exists between the movable electrical terminal 61 and arm 68 of bracket 67 to the conductive rod 32. However, the major portion of current flows through the current path 173.
  • spring means 107 also operates as a supplementary opening spring, as will now be described.
  • the closing operation drives the rotatable lever arm 102 downwardly, as was previously described, so as to compress spring means 107.
  • the amount of travel which the insulating rod 99 may experience in the downward vertical direction is limited by the stationary contact 58. Since the rod 99 only experiences approximately /2" of travel and since the rotatable lever arm 102 and collar 101 experiences more than /2" of travel, it can clearly be seen that spring 107 is compressed by a substantial amount. In this position, with the rotatable arms 112a and 112b locked in the contacts closed position, the spring means 107 acts as additional means for maintaining the cooperating contacts 57 and 58 firmly engaged.
  • Spring means 107 also cooperates with the buffer mechanism to absorb a large amount of the closing impact toward the end of the closing stroke so as to prevent the various linkages from being damaged due to abrupt deceleration of the linkage members. Thus, the spring means 107 is now compressed and is in a substantially fully charged condition.
  • the opening springs are in two sets, namely, the set comprised of springs 120- 122 and spring 107. Both of these sets of springs contribute to the opening operation, but each serve a particular function that will now be described.
  • the set of opening springs comprised of spring members 120-122 which are mounted above the closing mechanism delivers energy throughout the opening stroke, but this energy is designed only to overcome operating friction and maintain contact velocity already established by the main contact pressure and accelerating opening springs.
  • the benefit of this arrangement is to minimize the end of stroke impact and reduce the problem of bounce-free travel termination to manageable proportions.
  • the second set of opening springs 107 which is comprised of a pair of such opening springs is mounted at opposite ends of jack shaft 103 (only one of which is shown in FIGURES 2 and 2a) serve the dual function of supplying the very high contact pressure required by the interrupters and the force required for the extremely high acceleration rate necessary to bring the contacts promptly to their high parting velocity.
  • the springs 107 deliver their energy only through the first half of the opening stroke, and are mechanically by-passed at the half-way point.
  • linkages 118, 108 and 102 permits spring 107 to be urged rapidly in the upward vertical direction, as shown by arrow 176, driving collar 101 into engagement with end coupling 100, thereby rapidly urging insulating rod 99 upward and causing contact crank arm 80 to rotate counterclockwise about its pivot 96 (as shown in FIGURE 3) so as to move the movable electrical terminal 61a in the direction shown by arrow 176.
  • the rapidness of this engagement is thereby primarily caused by spring means 107 until the opening stroke reaches approximately the half-way point at which time the other set of opening springs comprised of spring members -122 which release their energy at a much slower rate of spring means 107, exert control over the final half of the opening stroke.
  • An extremely advantageous feature of this arrangement is that the contact pressure and accelerating springs 107 extract no energy from the closing springs during the first half of the closing stroke, during which time all of the closing energy should be directed to the accelerating of the masses represented in the mechanism contacts and linkages near the end of the stroke.
  • the piston rod 131 which is pivotally coupled to arms 112a and 112b of FIGURE 4b decelerate the movable contact quickly to a bounce-free stop. This is important in order to prevent damaging bounce are when closing in on a high fault.
  • the opening operations may be initiated either by mechanical or electrical means in order to release the opening latch means.
  • the opening operation in the instant application may be triggered by the magnetic latch 157, shown best in FIGURES 4 and 4b, when operating in response to high magnitude fault currents.
  • the magnetic latch is a flux-shift device consisting of a permanent magnet 181, a low reluctance flux path through control winding 182, a parallel high reluctance flux path through armature 162, and an armature 162 capable of limited rotation through a fixed number of angular degrees.
  • the armature is normally locked in an inactive position by the permanent magnet flux, but is spring biased in an active direction.
  • the armature in contact with fixed pole pieces 183, and 184, comprises the low reluctance path.
  • the high reluctance path consists of a core 182 and an air gap in series therewith. Core 182 carries a coil (not shown).
  • a pulse of current through the coil momentarily converts the high reluctance path to a lower reluctance and causes the flux to shift from the low reluctance path of armature 162.
  • the shift in flux reduces armature holding torque below the spring bias torque and the armature is released.
  • the end 158a of the flexible spring drives a projection of the tripping latch, thus releasing the latch and permitting the opening of the vacuum interrupters.
  • the coil of the magnetic latch is supplied by secondaries of special bushing current transformers 185, shown near the top of FIGURE 2 and commonly referred to as sensorsfAs can best be seen in FIGURE 2, the sensors 185 are substantially annular and surround insulator 29 and hence conducting rod 31 so as to be inductively coupled to any current passing therethrough.
  • the sensors are secured by means of fastening members 186 which rigidly clamp a support plate 187 beneath the current sensors to thereby hold them rigidly in place.
  • the upper ends of the fastening members are secured to the cover plate 24 of the reclosure apparatus.
  • the design of the vacuum interrupters is such that during high fault currents the currentcarrying path on the moving contact end, i.e., current path 173 of FIGURE 5a, provides electromagnetic forces that tend to increase rather than decrease contact force during the flow of fault current.
  • the current links 74 and 75 of FIGURES 5a and 5b tend to increase contact pressure of the links during fault current flow.
  • the sequence of operations performed by the recloser in response to fault current conditions of any variety is controlled by an electronic solid state control circuit housed at 190, shown in FIGURE 2, which electronic cir- 15 cuitry determines open interval duration, the number of open intervals, dual time/current characteristic and final lock-out.
  • the control circuitry housed at 190 is equipped with calibrated dials permitting adjustment to published values and accuracies of any of the following operating characteristics Choice of time delay curve;
  • Duration of second open interval Duration of third open interval
  • knobs 191 are accessible to any operating personnel through removable panel 193 and these knobs provide for reclose after lock-out, local trip, and a safety lock-out or non-automatic setting to defeat the control programming and cause lock-out after one opening response to a fault.
  • the control is compact and may be readily removed by maintenance personnel for inspection and/ or maintenance purposes.
  • the unique characteristic of a recloser is the capability of immediately opening due to a severe current change in the circuit being monitored, to remain open for a brief predetermined interval and then to reclose in order to place the circuit back into service.
  • the theory behind such operation is that the large majority of such abrupt current changing conditions are transient in nature and that such conditions will be corrected within the very "brief interval of open time.
  • the recloser therefore will open in response to such a condition, remain open for a brief interval and then reclose in an effort to allow the fault condition to be cleared. If not cleared, a second important capability is time/ current coordination With down line devices to cause disconnection of the faulted line section while continuing service to the remainder of the connected circuit.
  • the recloser then is capable of opening two or more additional times in the presence of an abrupt current change and reclose each time thereafter until having reclosed a predetermined number of times and finding that the critical condition is still present will then trip and lock out, i.e., lock in an open position.
  • the instant invention provides a novel recloser apparatus for use in either outdoor or indoor applications and which is uniquely adapted for outdoor use due to its lightweight high strength design in which a skeletal structure is employed for support only and the housing therefore, which is preferably formed of a suitable insulating material, performs only the function of protecting the recloser operating apparatus from the elements and is not relied upon to provide any structural strength for the device.
  • the vacuum interrupters are mounted directly between their associated insulator bushings and the design of the operating mechanism permits mounting of the operating device directly beneath the vacuum interrupters so as to greatly simplify operation and packaging of the device.
  • the opening spring functions are divided between two separate sets of opening springs one of which assists in providing excellent contact pressure when the recloser vacuum interrupters are in the engaged position and which is designed to impart extremely high accelerationto the moving contacts, which acceleration is necessary to bring the contacts promptly to their high parting velocity.
  • This set of opening springs does not affect the closing operation from its initiation to substantially a point halfway through the closing stroke.
  • a recloser device comprising:
  • a base for securing the recloser device to a surface
  • a cover plate secured to the horizontally aligned section of said arch and overlaying the upper marginal edge of said enclosure for substantially sealing the top of said enclosure;
  • said rectangular enclosure and said barrier wall defining an upper compartment for said recloser dev1ce;
  • vacuum switch means within said compartment being mechanically supported between said pair of terminal bushings and being electrically connected theret0.
  • said closed loop member also has a downwardly directed groove, wherein said barrier wall has at least one opening and wherein there is further included:
  • a second disc shaped enclosure having a lower end embracing said vertical column at the lower end of said column and having an upper marginal edge seated in said downwardly directed groove;
  • said second enclosure and said barrier wall defining a lower compartment for said recloser device
  • insulating connecting means coupling said operating mechanism to said vacuum switch means through said barrier wall opening.
  • a recloser device comprising:
  • a substantially horizontally aligned barrier wall mounted in said enclosure dividing said enclosure into upper and lower compartments;
  • a vacuum switch comprising a pair of cooperating contacts mounted within a vacuum enclosure, said vacuum switch being mounted within said upper compartment and between the lower ends of said bushin s;
  • one of said contacts being stationary and the other being movable into and out of engagement with said one contact;
  • an operating mechanism mounted in said lower compartment for operating said movable contact between the engaged and disengaged positions
  • said barrier wall having an opening
  • said insulating rod being diagonally aligned so that its lower end in said lower compartment is positioned beneath said vacuum switch;
  • first and second arms being keyed to said shaft
  • closing spring means movable between a charged and a discharged position and being mechanically linked to said second arm
  • said one end of said L-shaped arm being pivotally coupled to said collar;
  • first opening spring means surrounding said insulating rod being positioned beneath said collar;
  • closing spring means moving said contact pair to the engaged position'when moving from the charged to the discharged position
  • anism further comprises:
  • releasable latch means for latching said cooperating contacts into the engaged position when said closing spring moves to the discharged position
  • said second opening spring being normally discharged and being charged when said closing spring is discharged;
  • said first opening spring means being discharged prior to said second opening spring to initiate high speed disengagement of said cooperating contacts upon release of said latch means.
  • said vacuum switch means is further comprised of:
  • a movable terminal protruding through one end of said envelope and having its interior end secured to said movable contact
  • said conductive link means and said bracket forming a loop to urge said contacts into firm engagement when a current flows through said vacuum switch and said bushings.
  • said insulating rod upper end being pivotally connected to said movable contact terminal outer end.
  • Fig. 2a change lOlb designating the downwardly projecting portion of end coupling 100 to 10Gb;
  • Fig. 3 apply lOOb to the downwardly projecting portion of end coupling 100 andapply 143 to the pivot pin at the lower end of lever arm 108;
  • Fig. 4 apply 157 immediately below reciprocating lever 152;
  • Fig. 4b apply 141a to the lower threaded end of L-shaped rod 141 and change 129 to 129a and extend the lead line from 150 to the flat plate mounted on pin 129;
  • Fig. 5a apply a phantom line 173 through elements 57-61 61a, 74, 72 and 67 to show the main current path through the movable contact linkage;
  • Fig. 5a apply a phantom line 173 through elements 57-61 61a, 74, 72 and 67 to show the main current path through the movable contact linkage;
  • Fig. 1 change lOlb designating the downwardly project

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US567700A 1966-07-25 1966-07-25 Vacuum recloser having lightweight,rugged skeletal housing Expired - Lifetime US3502834A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56770066A 1966-07-25 1966-07-25

Publications (1)

Publication Number Publication Date
US3502834A true US3502834A (en) 1970-03-24

Family

ID=24268282

Family Applications (1)

Application Number Title Priority Date Filing Date
US567700A Expired - Lifetime US3502834A (en) 1966-07-25 1966-07-25 Vacuum recloser having lightweight,rugged skeletal housing

Country Status (3)

Country Link
US (1) US3502834A (de)
GB (1) GB1169997A (de)
NL (2) NL140373B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601565A (en) * 1968-05-22 1971-08-24 Westinghouse Electric Corp Vacuum circuit interrupter with high voltage switch compartment and low voltage operating mechanism compartment separated by a grounded metallic partition
US3932719A (en) * 1973-12-26 1976-01-13 Allis-Chalmers Corporation Circuit breaker having a single pull-rod operating system with a selective trip-free control
US20050006211A1 (en) * 2001-10-22 2005-01-13 Nils Anger Method for controlling an electrical switching module which can be displaced between an entry position and an exit position
EP2325858A1 (de) * 2009-11-20 2011-05-25 ABB Technology AG Mittelspannungsschutzschalteranordnung
US9887478B2 (en) * 2015-04-21 2018-02-06 Varian Semiconductor Equipment Associates, Inc. Thermally insulating electrical contact probe
US10134568B2 (en) 2016-11-02 2018-11-20 Varian Semiconductor Equipment Associates, Inc. RF ion source with dynamic volume control

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103151723A (zh) * 2013-04-07 2013-06-12 深圳市金博联电力技术有限公司 一种全密封全固体绝缘环网柜
CN119361371B (zh) * 2024-12-24 2025-03-14 七星电气股份有限公司 一种柱上断路状态可视化真空断路器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473843A (en) * 1945-02-28 1949-06-21 Westinghouse Electric Corp Circuit interrupter
US2711460A (en) * 1952-02-05 1955-06-21 Gen Electric Support structure for gas blast circuit breaker
US2937258A (en) * 1958-11-12 1960-05-17 Ite Circuit Breaker Ltd Spring closing system for circuit breakers
US2961067A (en) * 1958-11-12 1960-11-22 Ite Circuit Breaker Ltd Electrically operated stored energy system for circuit breakers
US3163735A (en) * 1962-06-29 1964-12-29 Gen Electric Electric circuit breaker with sealed interrupting unit
US3300609A (en) * 1963-05-15 1967-01-24 Ass Elect Ind Switchgear for high voltage power circuits with removable vacuum switch units

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473843A (en) * 1945-02-28 1949-06-21 Westinghouse Electric Corp Circuit interrupter
US2711460A (en) * 1952-02-05 1955-06-21 Gen Electric Support structure for gas blast circuit breaker
US2937258A (en) * 1958-11-12 1960-05-17 Ite Circuit Breaker Ltd Spring closing system for circuit breakers
US2961067A (en) * 1958-11-12 1960-11-22 Ite Circuit Breaker Ltd Electrically operated stored energy system for circuit breakers
US3163735A (en) * 1962-06-29 1964-12-29 Gen Electric Electric circuit breaker with sealed interrupting unit
US3300609A (en) * 1963-05-15 1967-01-24 Ass Elect Ind Switchgear for high voltage power circuits with removable vacuum switch units

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601565A (en) * 1968-05-22 1971-08-24 Westinghouse Electric Corp Vacuum circuit interrupter with high voltage switch compartment and low voltage operating mechanism compartment separated by a grounded metallic partition
US3932719A (en) * 1973-12-26 1976-01-13 Allis-Chalmers Corporation Circuit breaker having a single pull-rod operating system with a selective trip-free control
US20050006211A1 (en) * 2001-10-22 2005-01-13 Nils Anger Method for controlling an electrical switching module which can be displaced between an entry position and an exit position
US7019228B2 (en) * 2001-10-22 2006-03-28 Siemens Aktiengesellschaft Method for controlling a displaceable electrical switching module
CN102687228A (zh) * 2009-11-20 2012-09-19 Abb技术股份公司 中压断路器装置
WO2011060921A1 (en) * 2009-11-20 2011-05-26 Abb Technology Ag Medium voltage circuit breaker arrangement
EP2325858A1 (de) * 2009-11-20 2011-05-25 ABB Technology AG Mittelspannungsschutzschalteranordnung
US8629366B2 (en) 2009-11-20 2014-01-14 Abb Technology Ag Medium voltage circuit breaker arrangement
CN102687228B (zh) * 2009-11-20 2015-07-22 Abb技术股份公司 中压断路器装置
US9887478B2 (en) * 2015-04-21 2018-02-06 Varian Semiconductor Equipment Associates, Inc. Thermally insulating electrical contact probe
US20180131115A1 (en) * 2015-04-21 2018-05-10 Varian Semiconductor Equipment Associates, Inc. Thermally insulating electrical contact probe
US10826218B2 (en) * 2015-04-21 2020-11-03 Varian Semiconductor Equipment Associates, Inc. Thermally insulating electrical contact probe
US10134568B2 (en) 2016-11-02 2018-11-20 Varian Semiconductor Equipment Associates, Inc. RF ion source with dynamic volume control

Also Published As

Publication number Publication date
GB1169997A (en) 1969-11-12
NL140373C (de)
NL140373B (nl) 1973-11-15
NL6707895A (de) 1968-01-26

Similar Documents

Publication Publication Date Title
US3663906A (en) Electric circuit breaker with magnetically assisted closing means
US5321221A (en) Self-disconnecting circuit-breaker for medium tension, and use thereof in a medium-tension station or bay
US7679022B2 (en) Vacuum insulated switchgear
CA1036644A (en) Circuit-interrupter
US6373015B1 (en) Integral load connector module
US4292611A (en) High-speed automatic tripping contactor
US4636760A (en) Low voltage circuit breaker with remote switching function
US6242708B1 (en) Isolator switch
RU2020631C1 (ru) Вакуумный выключатель модульный серии "tel"
CN101740260A (zh) 真空开关设备
CN1893210B (zh) 真空绝缘开关设备
WO2001050561A1 (en) Modular, miniaturized switchgear
US2258150A (en) Circuit-controlling apparatus
US3163735A (en) Electric circuit breaker with sealed interrupting unit
US3560682A (en) Vacuum interrupter with shunting main contact structure and series disconnecting contact structure
EP0740322A2 (de) Anordnung von Leistungsschaltern
US20250104944A1 (en) Circuit breaker having vacuum interrupters and single-phase control with magnetic actuators and associated method
US3772489A (en) Racking safety disconnect switch for vacuum circuit breakers
CN109036992A (zh) 一种断路器的屏蔽灭弧方法
US3280282A (en) Combination current limiting fuse and vacuum switch
US3794799A (en) Gas insulated switch with adjustable overcenter toggle actuator therefore
US3339037A (en) High voltage switch construction
US3194928A (en) Center break high voltage switch with circuit interrupters
CN108962700A (zh) 一种断路器触头间的屏蔽灭弧装置
CA1086817A (en) Compressed gas filled circuit breaker

Legal Events

Date Code Title Description
AS Assignment

Owner name: BROWN BOVERI ELECTRIC INC.; SPRING HOUSE, PA. 1947

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:I-T-E IMPERIAL CORPORATION;REEL/FRAME:004103/0790

Effective date: 19820428