US3590188A - Fluid-blast circuit interrupter with piston assembly and electromagnetic driving means - Google Patents

Fluid-blast circuit interrupter with piston assembly and electromagnetic driving means Download PDF

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Publication number
US3590188A
US3590188A US576740A US3590188DA US3590188A US 3590188 A US3590188 A US 3590188A US 576740 A US576740 A US 576740A US 3590188D A US3590188D A US 3590188DA US 3590188 A US3590188 A US 3590188A
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Prior art keywords
movable
piston
stationary
coil
contact
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Expired - Lifetime
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US576740A
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English (en)
Inventor
Russell E Frink
William H Fischer
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B7/00—Enclosed substations, e.g. compact substations
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/882—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts the movement being assisted by accelerating coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/02—Details
    • H02B11/04—Isolating-contacts, e.g. mountings or shieldings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/18—Switchgear having carriage withdrawable for isolation with isolation by vertical withdrawal
    • H02B11/20—Switchgear having carriage withdrawable for isolation with isolation by vertical withdrawal having an enclosure

Definitions

  • ABSTRACT An improved piston-type fluid-blast circuit interrupter is provided having a stationary operating cylinder, within which reciprocates a movable piston assembly carrying the movable contact assembly of the interrupter.
  • Electromagnet means including three accelerating coils, one movable with the piston assembly, another located in the closed end of the operating cylinder, and a third coil movable with a driver unit, are all connected in series during the opening operation of the interrupter.
  • the driver unit is mechanically connected through the closed end of the operating cylinder with the movable piston assembly.
  • the movable contact structure comprises a main movable contact and an inner movable arcing probe movable together and insulated from each other with the three accelerating coils connected between the main movable contact and the movable arcing probe in the closed position of the interrupter.
  • PATENTEDJUHZQIQII sum 11 0F 15- MC HOUSING 26 UNITS FIG. 34.
  • This invention relates generally to fluid-blast circuit interrupters, and, more particularly, to fluid-blast circuit interrupters of the type having a piston assembly associated therewith for generating fluid under pressure to be forced into the established arc to effect the extinction thereof.
  • the first requirement for any line of switchgear is a reliable circuit breaker.
  • Various types of interrupters have been proposed. However, to increase the voltage and interrupting ratings, it has been proposed to use puffer-type structures. Basically, the puffer concept is not new. It consists essentially of a pair of separable contacts, a piston and a cylinder all mounted in a reservoir containing a suitable arc-interrupting gas. The contacts and piston are mounted in such a way that as the contacts are parted, the piston moves to drive the gas in the cylinder through the arc to interrupt it.
  • Such devices were investigated as long as 20 years ago using the then-available interrupting gases. A moderate degree of success was attained at that time. However, the devices were too inefficient to warrant further development.
  • a general object of the present invention is to provide an improved fluid-blast circuit interrupter having magnetic means serially connected into the electrical circuit, and taking advantage of the short circuit energy to improve the fluid-blast operation of the interrupter.
  • Another object of the present invention is to provide an improved fluid-blast type of circuit interrupter having improved piston-operated means associated therewith, and electromagnetic driving means to assist in the operation of said piston means.
  • Another object of the present invention is the provision of an improved fluid-blast circuit interrupter in which a plurality of accelerating coils are used to assist in the operation of the associated piston assembly to more rapidly generate fluid under pressure, which is subsequently ejected into the arcing region to rapidly effect the extinction thereof.
  • Another object of the present invention is the provision of an improved fluid-blast circuit interrupter having highly effective piston-moving means and fluid-directing means associated therewith.
  • Still a further object of the present invention is the provision of an improved fluid-blast circuit interrupter of compact size, and operating in a highly efficient manner to quickly generate the required amount of high-pressure fluid, such as gas, and to effectively direct the gas under high pressure toward the established arc to effect circuit interruption.
  • high-pressure fluid such as gas
  • Still a further object of the present invention is the provision of an improved fluid-blast circuit interrupter having a stationary operating cylinder with a cylinder head closing one end thereof, in which a stationary accelerating coil is positioned, and providing a movable piston assembly carrying the movable contact structure in which a second accelerating coil, which is movable, is carried to assist in the opening and fluidcompressing stroke.
  • Still a further object of the present invention is the provision of an improved fluid-blast circuit interrupter having more efficient venting means associated with the contact structure to highly effectively direct the generated fluid blasts into the arcing region for most efficient arc extinction.
  • the power supplied by the associated operating mechanism may be sufficient in itself to provide the desired piston-driving effort suitable for high-pressure gas generation.
  • a desirable assist is provided by the electromagnetic means, as set forth in the present invention, as described hereinafter.
  • rating factors which are required are as follows:
  • a stationary operating cylinder within a surrounding metallic tank structure containing a suitable arcextinguishing gas, such as sulfur-hexafluoride (SF gas, at a pressure of say 75 psi.
  • a suitable arcextinguishing gas such as sulfur-hexafluoride (SF gas, at a pressure of say 75 psi.
  • One end of the aforesaid stationary operating cylinder is closed by a stationary piston head having a stationary accelerating coil encapsulated therein.
  • a movable piston assembly Movable longitudinally within the stationary dperating cylinder is a movable piston assembly carrying the movable contact structure, the latter comprising an outer main contact and an inner arcing contact insulated from the outer main contact.
  • a movable accelerating coil is associated with the movable piston assembly.
  • the movable piston assembly is connected through the closed end of the operating cylinder with a movable driving assembly, the latter comprising a movable repulsion coil.
  • a stationary contact assembly is situated adjacent the open end of the stationary operating cylinder. The arrangement is such that during the opening operation the main are, established between the main contacts, is carried by the gas flow to impinge onto the movable arcing contact to thereby insert serially into the electrical circuit being interrupted the three accelerating coils.
  • the initial mechanical movement of the movable piston assembly as supplied by a conventional mechanism, is augmented and assisted by the electromagnetic driving means including a plurality of, such as three, accelerating coils inserted serially into the electrical circuit. This is particularly advantageous during heavy fault-current interruption.
  • FIG. I is an end elevational view of a three-phase truckmounted removable circuit-interrupter unit, involving three individual pole-units;
  • FIG. 2 is a side elevational view of the truck-mounted removable three-phase circuit-interrupting unit illustrated in FIG. 1;
  • FIG. 4 is a vertical sectional view of the pressure tank taken along the line lV-IV of FIG. 3 looking in the direction of the arrows, the contact structure being illustrated in the closedcircuit position;
  • FIG. 5 is a considerably enlarged horizontal sectional view taken through the interrupting element of FIG. 3, substantially along the line V-V of FIG. 3, the contact structure being illustrated in the closed-circuit position;
  • FIG. 6 is a fragmentary view of a portion of the contact structure illustrating the establishment of the main-current arc during the initial portion of the circuit-opening operation
  • FIG. 7 is aview similar to that of FIG. 6, but showing the main-current are as having transferred to the movable arcing contact;
  • FIG. 8 is a fragmentary view, similar to that of FIGS. 6 and 7, but showing the contact structure in the position at which the transferred arc is about to be interrupted;
  • FIG. 9 illustrates a vertical sectional view taken through the improved interrupting element of the present invention, the contact structure being illustrated in the closed-circuit position;
  • FIG. 10 is a diagrammatic view illustrating the accelerating coils with their connections to the contact structure
  • FIGS. 11 and 12 show, respectively, in plan, and in vertical section, the supporting spider member secured to the main movable contact tube;
  • FIGS. 1315 illustrate views of the supporting rear casting clamp for the rear terminal stud
  • FIGS. 16 and 17 illustrate, respectively, side and front views of the movable rear main contact, which is threaded to the rear end ofthe main movable contact tube;
  • FIG. 18 is a vertical sectional view taken through the movable piston assembly with the contact structure omitted, and illustrating the terminals for the movable accelerating piston coil and the insulating nozzle member;
  • FIGS. 19 and 20 illustrate, respectively, in vertical section
  • the end moving driving accelerat- FIGS. 24 and 25 are, respectively, vertical sectional views and end elevational views of the piston accelerating coil;
  • FIG. 26 is a side elevational view of the upper connecting rod for the movable piston assembly
  • FIG. 27 is a side elevational view of the lower connecting rod for the movable piston assembly
  • FIG. 28 is an end elevational view of the movable piston member
  • FIG. 29 is an end elevational view of the insulating spacer element disposed interiorly of the movable piston accelerating coil
  • FIG. 30 is an end elevational view of the front insulating clamping plate for the movable piston assembly
  • FIG. 31 is a perspective view of a substation for housing, for example, 34.5 kv. outdoor metal-clad switchgear for controlling transformer and feeder circuits;
  • FIG. 32 is a diagrammatic plan view of the substation of FIG. 31 illustrating the multiplicity of metal-clad switchgear cells disposed in contiguous relationship, and fronting on an operating aisle;
  • FIG. 33 is a diagrammatic view of the transformer, bus, capacitor and feeder circuits to indicate the functioning of the cell units of FIG. 32;
  • FIG. 34 is an end elevational view of the metal-clad switchgear units of FIG. 32, indicating the aisle service area and the space occupied by the 26 cell units;
  • FIG. 35 is a sectional view taken through one of the cell units illustrating the elevating mechanism for providing vertical travel of the individual removable circuit-interrupting units, the figure showing the circuit-interrupting unit in the lowered disconnected position;
  • FIG. 36 is a fragmentary vertical sectional view illustrating the engaging portions of the frame of the removable circuit-interrupting unit and the lifting channel members vertically movable within the cell structure;
  • FIG. 37 is a perspective view looking into the interior of the breaker compartment of the cell structure with the circuit breaker in the lowered disconnected position;
  • FIG. 38 is a fragmentary perspective view of the cell structure.
  • the reference numeral 1 indicates a three-phase truck-mounted fluid-blast circuit interrupter unit of the type which may be rolled into an associated cell structure 2 (FIG. 35).
  • FIG. 35 As well known by those skilled in the art, in metal-clad switchgear equipment it is customary to have cells or cubicles 2, as shown in FIG. 35, into which are rolled removable interrupting unit equipment 1.
  • a frame assembly 7 is provided to support the circuit breaker 1 on support bosses 7a welded to the underside of the tanks.
  • the frame assembly 7 is welded up from structural steel sections 9, 10. Rollers 19 are provided to facilitate operative movement into and out of the cooperable cell structure 2.
  • the present invention is particularly concerned with the interrupting structure of the equipment illustrated in FIGS. I and 2.
  • an operating mechanism compartment generally designated by the reference numeral 8
  • three heavy metallic tanks 11 which enclose the respective interrupting elements 12 as sociated with each pole-unit .13.
  • the interrupting assembly Disposed within each of the three-tank structures 11 is the interrupting assembly, generally designated by the reference numeral 12, and comprising a stationary insulating operating cylinder 14 having one end 15 thereof open, and having the other end 16 thereof closed by a base portion 17, the latter including a stationary accelerating coil 18 embedded in a suitable plastic 21, for example, epoxy resin, as shown in FIG. 21.
  • the front end 14a of the stationary operating cylinder 14 is supported, as by bolted connections, to four bosses 22, (FIG. 4) the latter being welded interiorly of the tank structure 11.
  • bosses 22 Extending downwardly through an opening 23 provided adjacent the front end 14a of the stationary operating cylinder 14 is a line-terminal stud 24, which extends upwardly through the front terminal bushing 25 of each pole-unit 13.
  • the terminal stud 24 is clamped to a stationary conducting supporting casting, generally designated by the reference numeral 26, and shown more clearly in FIGS. 3 and 23 of the drawings.
  • the stationary support casting 26 has a clamping portion 26a of bifurcated construction, which clamps by bolts 27 to the lower interior end of the terminal stud 24 extending through the front terminal bushing 25 of the device.
  • the stationary casting 26 has a spider portion 26b with an integrally formed support ring 260, which is bolted as at 28 (FIG. 9) to the stationary operating cylinder 14.
  • the stationary conducting casting 26 has a threaded supporting portion 26d, which adjustably threadedly secures a stationary contact assembly, generally designated by the reference numeral 31 (FIG. 5).
  • the main stationary contact assembly 31 comprises a main stationary contact 33 ofgenerally tubular configuration, and having a plurality of flexible main contact fingers 33a formed at the right-hand end thereof.
  • a conducting metallic arcing nozzle member 34 Disposed interiorly of the tubular main contact structure 33 is a conducting metallic arcing nozzle member 34, which is fixedly secured, as by brazing at 35, to the interior of the outer main contact tube 33 up against a shoulder portion 33b (FIG. 5) thereof.
  • Both the main flexible contact fingers 33a and the nozzle arcing member 34 have arc-resisting tip portions of a suitable arc-resistant metal, such as copper-tungsten or silver-tungsten alloys.
  • Movable lengthwise of the stationary operating cylinder 14 is a movable piston assembly 36 carrying a movable contact structure 37.
  • a pair of insulating operating links 41 cause the rightward opening movement of the movable piston assembly 36 carrying therewith the movable contact structure 37.
  • the movable piston assembly 36 (FIG. 5) includes an annular insulating clamping plate 42 (FIG. 30), an annular insulating spacing plate 43 having notches 44 provided therein, as shown in more detail in FIG. 29, to accommodate a moving first accelerating piston coil 45 shown in FIGS. 24 and 25.
  • the moving piston assembly 36 includes an insulating annular piston plate 46 (FIG. 28) having an outer peripheral groove 47, in which a piston ring 48 is inserted to prevent the escape of compressed gas 51 out of the region 52 of the operating cylinder 14 and around the outer periphery of the piston assembly 36.
  • the right-hand base end 16 ofthe operating cylinder 14 is closed by the annular head 17.
  • gas within the region 52 is compressed, and is forced to flow in a leftward direction through a movable insulating nozzle member 53, which is clamped between the two insulating plates 42, 46 and interiorly of the insulating spacing member 43. See FIG. 5 in this connection.
  • FIGS. 6-8 generally show the flow path for the compressed fluid 51, as indicated by the arrows 54.
  • the insulating links 41 have pivotal connections, by means of pivot pins 55, to bifurcated members 56, the latter being bolted by bolts 57 extending through the three insulating members 42, 43 and 46.
  • the main tubular movable contact 58 has a supporting spider 61 (FIGS. 11 and 12) fixedly secured thereto, as by brazing at 62, and the support spider 61 has holes 63 in the radially outwardly extending arms 64 thereof, through which extend supporting bolts 65, which additionally clamp the insulating plates 42, 43 and 46 together.
  • the movable first accelerating coil 45 has a configuration configuration more clearly shown in FIGS. 24 and 25, and has a pair of terminal lugs 66, 67 having threaded openings 66a, 67a therethrough.
  • the first accelerating coil 45 is wound of heavy copper strap, for example, with the outer terminal lug 66 thereof electrically and mechanically connected to an upper conducting guide and piston rod 68 (FIG. 26), which extends through an aperture 71 (FIG. 21) in the cylinder head 17, and is electrically connected, by a bolted connection 72 (FIG. 9), to one terminal end 73 (FIG. 20) ofa movable repulsion third coil 74 encapsulated in a driving unit 75 (FIG. 19) secured to the right-hand extremity of the movable contact structure 37, the latter comprising the outer tubular main contact tube 58 and an inner arcing tube 76 insulated therefrom, as shown in FIG. 5.
  • the two first and second accelerating coils 18, 45 are so wound that they magnetically attract each other, whereas the second and third accelerating coils 18, 74 are so wound as to magnetically repel each other.
  • the net result is a magnetically assisted opening fluid-driving motion of the piston assembly 36, as accelerated by the driving unit 75.
  • the other terminal 77 (FIG. 20) of the movable driving repulsion coil 74 is electrically connected to the inner arcing contact 76, which has a tubular configuration, as more clearly illustrated in FIG. 5.
  • terminal lug 67 connected to the inner strap of the movable accelerating coil 45 has a threaded connection 67a (FIGS. 18 and 24) to a relatively large conducting guide rod 78 (FIG. 27), which is bolted to the piston assembly 36 by a nut 81 (FIG. 9) so as to make metal-to-metal contact with terminal 67 of piston coil 45.
  • the right-hand end 78a of the relatively large conducting guide rod 78 extends through an opening 82 (FIG. 22) provided in the head 17 of the operating cylinder 14, and moves in sliding relationship with a tubular sliding contact 83 (FIG. 9).
  • This sliding contact construction 83 shown more clearly in FIG. 9, is of ball construction, and is set forth in detail and claimed in U.S. Pat. application filed Get. 13, I965, Ser. No. 495,475, now U.S. Pat. No. 3,301,986, issued Jan. 31, 1967 to Russell E. Frink and assigned to the assignee of the instant application.
  • the right-hand end of the relatively large guide rod 78 is fixedly secured by bolts 84, 85 to an insulated portion 86 (FIGS. 9 and 20) of the moving driving unit 75.
  • the inner tubular arcing contact 76 has an arc-resisting tip portion 760, which is fixedly secured to the left-hand extremity thereof, as by brazing. Additionally, the tubular arcing contact 76 has a support ring 88 brazed thereto, which serves to seat a split insulating spacing member 91, which serves to insulate the left-hand end of the inner tubular arcing contact 76 from the outer tubular main contact 58. Also the right-hand end of the inner movable tubular arcing contact 76 has a tubular threaded insert 92 fixedly secured thereto, as by brazing.
  • An insulating washer 93 serves to support the electrical strap connection 96 to the moving driving coil 74 and also to fixedly and insulatingly support the inner arcing tube 76 from the outer main contact tube 58.
  • the rear secondary movable main contact structure 98 assumes the form ofa casting, shown in FIGS. 16 and 17, and has a pair of movable secondary main contacting portions 101, of wedge configuration, which mate with two sets 102 (FIG. 5) of flexible main stationary secondary contact fingers 103, which are secured to downwardly extending arms 104 of a rear secondary contact support casting 105, shown in more detail in FIGS. 13-15 of the drawings.
  • the stationary second accelerating coil 18 has one terminal lug 106 (FIG. 21) thereof, as mentioned, making sliding electrical contact with the lower conducting guide rod 78, and has a pair of terminal lugs 107, 108 electrically connected to the outer strap 18a thereof making threaded supporting and electrical connection by a pair of bolts 111 (FIG. 15), which extend through the two mounting holes of the rear supporting casting of the device.
  • the rear support casting 105 has a laterally extending bifurrear terminal stud 113 extending upwardly through the rear terminal bushing 114 of the interrupting unit 1. As shown in FIG. 3, the rear support casting 105, by securement to the cylinder head 17, serves additionally for the entire support of the right-hand end of the operating cylinder 14, as viewed in FIG. 3.
  • FIG. 10 of the drawings Since the rightward opening movement of the piston assembly 36 also causes separation of the rear movable secondary main contacts 101 away from the rear stationary secondary main contacts 103, there occur two breaks in the electrical circuit, as illustrated in FIG. 10 of the drawings. Since the arc voltage at the two breaks builds up, and since the resistance through the parallel circuit, including the accelerating coils 18, 45 and 74, offers less impedance, the are 125 transfers to the separable arcing contacts 34, 76, and thereby inserts the three accelerating coils serially into the electrical circuit.
  • Fig. 8 illustrates the arc location at the time when the accelerating coils are in series circuit, and at a time when the gas flow is about to effect final arc extinction. Continued opening movement inserts an isolating gap into the circuit, as indicated by the dotted lines 126 in FIG. 5.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US576740A 1966-09-01 1966-09-01 Fluid-blast circuit interrupter with piston assembly and electromagnetic driving means Expired - Lifetime US3590188A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57674066A 1966-09-01 1966-09-01

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US3590188A true US3590188A (en) 1971-06-29

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US576740A Expired - Lifetime US3590188A (en) 1966-09-01 1966-09-01 Fluid-blast circuit interrupter with piston assembly and electromagnetic driving means

Country Status (6)

Country Link
US (1) US3590188A (enrdf_load_stackoverflow)
JP (1) JPS4515696Y1 (enrdf_load_stackoverflow)
BE (1) BE703335A (enrdf_load_stackoverflow)
FR (1) FR1535395A (enrdf_load_stackoverflow)
GB (1) GB1149660A (enrdf_load_stackoverflow)
SE (1) SE330566B (enrdf_load_stackoverflow)

Cited By (21)

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US3727109A (en) * 1971-02-17 1973-04-10 Westinghouse Electric Corp Tank-type grounding and test device with line, bus and test terminal bushings
DE2847808A1 (de) * 1978-11-02 1980-05-08 Siemens Ag Kontaktanordnung fuer druckgasschalter
US5705781A (en) * 1993-11-19 1998-01-06 Siemens Aktiengesellschaft Electrical gas-blast switch
RU2148281C1 (ru) * 1998-12-07 2000-04-27 Акционерное общество открытого типа "Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения" (АО "НИИВА") Дугогасительное устройство высоковольтного газонаполненного автокомпрессионного выключателя
RU2153205C1 (ru) * 1998-12-07 2000-07-20 Акционерное общество открытого типа "Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения" Дугогасительное устройство высоковольтного газонаполненного автокомпрессионного выключателя
US20030138331A1 (en) * 2002-01-22 2003-07-24 John Fox Metering pump with proportional output
WO2003085259A1 (en) * 2002-04-01 2003-10-16 R. Sanderson Management, Inc. Variable stroke/clearance mechanism
US6829978B2 (en) 1999-08-05 2004-12-14 R. Sanderson Management, Inc. Piston engine balancing
US20050005763A1 (en) * 1997-09-15 2005-01-13 R. Sanderson Management, A Texas Corporation Piston assembly
US20050039707A1 (en) * 1997-09-15 2005-02-24 R. Sanderson Management, Inc., A Texas Corporation Piston engine assembly
US20050079006A1 (en) * 2001-02-07 2005-04-14 R. Sanderson Management, Inc., A Texas Corporation Piston joint
RU2255391C1 (ru) * 2003-12-11 2005-06-27 Открытое акционерное общество "Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения" (ОАО "НИИВА") Дугогасительное устройство высоковольтного газонаполненного автокомпрессионного выключателя
US20050224025A1 (en) * 2002-05-28 2005-10-13 Sanderson Robert A Overload protection mecanism
US20050268869A1 (en) * 2004-05-26 2005-12-08 Sanderson Robert A Variable stroke and clearance mechanism
RU2273071C2 (ru) * 2000-11-17 2006-03-27 Абб Швайц Аг Контактная зона силового выключателя
US7162948B2 (en) 2001-11-02 2007-01-16 R. Sanderson Management, Inc. Variable stroke assembly balancing
US7331271B2 (en) 2001-02-08 2008-02-19 R. Sanderson Management, Inc. Variable stroke/clearance mechanism
US20090045892A1 (en) * 2007-08-13 2009-02-19 Nelson Carl D Circuit breaker with articulating control cabinet
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US2978560A (en) * 1958-03-20 1961-04-04 Ite Circuit Breaker Ltd Interrupter unit for telescoping blade switch
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US2430008A (en) * 1941-06-18 1947-11-04 Fernier Bernard Marie Hil Paul Electric circuit breaker
US2978560A (en) * 1958-03-20 1961-04-04 Ite Circuit Breaker Ltd Interrupter unit for telescoping blade switch
US3303310A (en) * 1959-03-04 1967-02-07 Westinghouse Electric Corp Dual-pressure circuit interrupter control device
US3008016A (en) * 1959-04-02 1961-11-07 Mc Graw Edison Co Metal enclosed switchgear
US3095490A (en) * 1960-02-26 1963-06-25 Westinghouse Electric Corp Circuit interrupters
US3238340A (en) * 1961-08-25 1966-03-01 Sprecher & Schuh Ag Gas-blast circuit breaker
DE1190079B (de) * 1963-03-28 1965-04-01 Siemens Ag Elektrischer Schalter
US3385941A (en) * 1964-08-18 1968-05-28 Westinghouse Electric Corp Combined protective gap device and by-pass switch for series capacitor installations
US3315056A (en) * 1964-09-10 1967-04-18 Fuji Electric Co Ltd Gas blast circuit breaker with electromagnetic contact actuating means
US3331935A (en) * 1964-12-21 1967-07-18 Westinghouse Electric Corp Gas-blast circuit breaker having dual piston means providing double-acting puffer arrangement

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* Cited by examiner, † Cited by third party
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US3727109A (en) * 1971-02-17 1973-04-10 Westinghouse Electric Corp Tank-type grounding and test device with line, bus and test terminal bushings
DE2847808A1 (de) * 1978-11-02 1980-05-08 Siemens Ag Kontaktanordnung fuer druckgasschalter
US5705781A (en) * 1993-11-19 1998-01-06 Siemens Aktiengesellschaft Electrical gas-blast switch
US7185578B2 (en) 1997-09-15 2007-03-06 R. Sanderson Management Piston assembly
US20070144341A1 (en) * 1997-09-15 2007-06-28 R. Sanderson Management Piston assembly
US7007589B1 (en) 1997-09-15 2006-03-07 R. Sanderson Management, Inc. Piston assembly
US7040263B2 (en) 1997-09-15 2006-05-09 R. Sanderson Management, Inc. Piston engine assembly
US6925973B1 (en) 1997-09-15 2005-08-09 R. Sanderson Managment, Inc. Piston engine assembly
US20050005763A1 (en) * 1997-09-15 2005-01-13 R. Sanderson Management, A Texas Corporation Piston assembly
US20050039707A1 (en) * 1997-09-15 2005-02-24 R. Sanderson Management, Inc., A Texas Corporation Piston engine assembly
US6915765B1 (en) 1997-09-15 2005-07-12 R. Sanderson Management, Inc. Piston engine assembly
RU2153205C1 (ru) * 1998-12-07 2000-07-20 Акционерное общество открытого типа "Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения" Дугогасительное устройство высоковольтного газонаполненного автокомпрессионного выключателя
RU2148281C1 (ru) * 1998-12-07 2000-04-27 Акционерное общество открытого типа "Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения" (АО "НИИВА") Дугогасительное устройство высоковольтного газонаполненного автокомпрессионного выключателя
US20050076777A1 (en) * 1999-08-05 2005-04-14 R. Sanderson Management, Inc, A Texas Corporation Piston engine balancing
US6829978B2 (en) 1999-08-05 2004-12-14 R. Sanderson Management, Inc. Piston engine balancing
RU2273071C2 (ru) * 2000-11-17 2006-03-27 Абб Швайц Аг Контактная зона силового выключателя
US20050079006A1 (en) * 2001-02-07 2005-04-14 R. Sanderson Management, Inc., A Texas Corporation Piston joint
US20060153633A1 (en) * 2001-02-07 2006-07-13 R. Sanderson Management, Inc. A Texas Corporation Piston joint
US7334548B2 (en) 2001-02-07 2008-02-26 R. Sanderson Management, Inc. Piston joint
US7331271B2 (en) 2001-02-08 2008-02-19 R. Sanderson Management, Inc. Variable stroke/clearance mechanism
US7162948B2 (en) 2001-11-02 2007-01-16 R. Sanderson Management, Inc. Variable stroke assembly balancing
US6913447B2 (en) 2002-01-22 2005-07-05 R. Sanderson Management, Inc. Metering pump with varying piston cylinders, and with independently adjustable piston strokes
US20030138331A1 (en) * 2002-01-22 2003-07-24 John Fox Metering pump with proportional output
WO2003085259A1 (en) * 2002-04-01 2003-10-16 R. Sanderson Management, Inc. Variable stroke/clearance mechanism
US20050224025A1 (en) * 2002-05-28 2005-10-13 Sanderson Robert A Overload protection mecanism
US7140343B2 (en) 2002-05-28 2006-11-28 R. Sanderson Management, Inc. Overload protection mechanism
RU2255391C1 (ru) * 2003-12-11 2005-06-27 Открытое акционерное общество "Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения" (ОАО "НИИВА") Дугогасительное устройство высоковольтного газонаполненного автокомпрессионного выключателя
US20050268869A1 (en) * 2004-05-26 2005-12-08 Sanderson Robert A Variable stroke and clearance mechanism
US7325476B2 (en) 2004-05-26 2008-02-05 R. Sanderson Management, Inc. Variable stroke and clearance mechanism
US20090045892A1 (en) * 2007-08-13 2009-02-19 Nelson Carl D Circuit breaker with articulating control cabinet
US7915558B2 (en) * 2007-08-13 2011-03-29 Mitsubishi Electric Power Products, Inc. Circuit breaker with articulating control cabinet
US11470843B2 (en) 2018-04-17 2022-10-18 Hour 72 Tissue bonding insect repellent
CN112820577A (zh) * 2020-12-30 2021-05-18 南方电网科学研究院有限责任公司 一种快速切断电路的操动机构及断路器
CN112820577B (zh) * 2020-12-30 2024-01-26 南方电网科学研究院有限责任公司 一种快速切断电路的操动机构及断路器
CN118572549A (zh) * 2024-05-21 2024-08-30 江苏北辰互邦电力股份有限公司 一种节能高效低损耗新能源升压变电站及使用方法

Also Published As

Publication number Publication date
FR1535395A (fr) 1968-08-02
SE330566B (enrdf_load_stackoverflow) 1970-11-23
JPS4515696Y1 (enrdf_load_stackoverflow) 1970-07-01
GB1149660A (en) 1969-04-23
BE703335A (enrdf_load_stackoverflow) 1968-01-15

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