US3624326A - Compressed-gas circuit breaker with readily removable terminal bushing means - Google Patents

Compressed-gas circuit breaker with readily removable terminal bushing means Download PDF

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Publication number
US3624326A
US3624326A US813441A US3624326DA US3624326A US 3624326 A US3624326 A US 3624326A US 813441 A US813441 A US 813441A US 3624326D A US3624326D A US 3624326DA US 3624326 A US3624326 A US 3624326A
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United States
Prior art keywords
tank
pair
terminal
stationary
pressure
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Expired - Lifetime
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US813441A
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English (en)
Inventor
Richard Edmund Kane
Robert L Hess
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/80—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve
    • H01H33/82—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas

Definitions

  • ABSTRACT A high-voltage, high-power compressed-gas circuit interrupter is provided utilizing a grounded metal tank [54] having a gas disposed therein at a relatively low pressure, say, REA A for exam le 45 p.s.i.
  • a pair of serial] related arc-extin uish- MEANS p y g 7 D F ing units are supported within the metallic grounded tank and Chums rawmg utilize a blast of gas directed through an orifice to bring about [52] U.S.Cl 200/148 R, the extinction of the two series arcs simultaneously.
  • a sup- 174/167 'porting structure disposed within the tank has lateral supports [51] lnt.CI ..l-l0lh33/54, to properly locate the blast valve and contact housing as- H0lh 33/86 sociated with each arc-extinguishing unit. Additionally, the [50] Field of Search 200/148, supporting structure supports an operating cylinder to accoml48.2, 148.6; 174/161, 167, I8 modate a movable piston secured to the moving contact of each interrupter.
  • Cited Terminal bushings are provided at the upper end of the metal- UNITED STATES PATENTS lic tank and are easily dismantled therefrom by a contact stud 3,009.042 ll/l96l Schrameck et al. 200/l48.2 x and terminal bushing finger arrangement which easily 3.043940 7/1962 Leeds 200/1482 separates and permits dismantlement at the upper mountmg 3 I29 276 4/1964 Easley ct 3
  • the high pressure 3'29] 12/1966 Telford 2O0/l48 l reservoir may be accommodated at the upper end of the tank 3,284,602 11/1966 Friedrich et al.
  • the structure In a high-power, high-voltage compressed-gas circuit interrupter it is desirable to provide a structure adaptable for fast operation and capable of easy dismantlement for inspection and assembly.
  • the structure should be adapted for the use of a number of arc-extinguishing units in series and capable of ready dismantlement.
  • the structure should be highly efficient in operation and compact in size.
  • the number of parts should be reduced to a minimum, and complexities of structure should be avoided.
  • U.S. Pat. No. 3,154,658 illustrates an arc-extinguishing structure in which a high-pressure blast of gas issues through an orifice or interrupting chamber into the interior of a hollow movable vented contact. It is desirable to utilize such an interrupting structure adaptable for a wide range of voltages and yet to employ simplified structures.
  • a grounded metallic tank filled with gas at a relatively low pressure there is provided a grounded metallic tank filled with gas at a relatively low pressure.
  • a pair of upstanding terminal bushings bring the current into the tank structure, in which is located a pair of arc-extinguishing units in series.
  • the movable contacts are piston actuated, and the control valve for the pressures used in the operating cylinders is adapted to bring about simultaneous operation of the two serially related arc-extinguishing units.
  • the preferred embodiment of the present invention utilizes a supporting structure, which not only laterally supports a blast value and stationary contact housing, but also the operating cylinder for the piston effecting movement of the movable contact.
  • This supporting structure in one particular embodiment, is attached to the upper tank cover so that the entire supporting structure depends from the upper end of the tank.
  • the supporting structure is hollow and serves to conduct high-pressure gas both to the operating cylinder and also to the blast valve and stationary contact housing.
  • Another object of the present invention is to provide of an improved compressed-gas circuit interrupter in which an interrupting structure may be laterally supported by a conduit or feed-tubestructure, which, itself, may depend from the upper end of the tank.
  • Still a further object of the present invention is the provision of an improved circuit breaker structure of the metallic tank type in which dismantlement and assembly of the terminal bushings may be readily achieved in a simplified manner.
  • Another object of the present invention is the provision of an improved high-voltage high-power compressed-gas circuit interrupter of the dual-pressure type in which the control valve is mechanically actuated and interconnects with other phase units of the device.
  • Still a further object of the present invention is the provision of an improvdi compressed-gas circuit interrupte of the type utilizing hollow movable contacts supportd in a nov manner and adapted for series relation.
  • FIG. I is a vertical sectional view, partially in side elevation, of an improved compressed-gas circuit interrupter embodying the principles of the present invention and illustrated in the O closed-circuit position;
  • FIG. 2 is an enlarged vertical sectional view taken through the blast valve and contact housing of the device, the contact structure being illustrated in the closed circuit position;
  • FIG. 3 is a view similar to that of FIG. 2, but illustrating the disposition of the several parts in an intermediate portion of the opening operation;
  • FIG. 4 is a view similar to FIG. 3, but illustrating the blast valve open and the gas blast extinguishing the arc;
  • FIG. 5 shows the fully open circuit position of the contact structure with the blast valve closed
  • FIGS. 6 and 7 illustrate two positions of the control valve.
  • the reference numeral 1 generally designates a highvoltage high-power compressed-gas circuit interrupter of the dual-pressure type.
  • a grounded metallic tank structure 2 supported upon a foundation 3 and containing interiorly thereof a relatively low-pressure gas 4, such as sulfur hexafluoride (SF gas, at a relatively low pressure, say, for example, 45 p.s.i.
  • SF gas sulfur hexafluoride
  • terminal bushings 5, 6 Extending upwardly from the metallic tank structure 2 is a pair of terminal bushings 5, 6 having line conductors 5a, 6a disposed therein, and making separable stud and finger engagement, as at 8, with a pair of stationary nonarcing terminalbushing contacts 9. This permits the terminal bushings 5, 6 to be unbolted at the mounting bolts 11 and the entire terminal bushing structure removed upwardly from the mounting flanges 13 for the tank 2.
  • the terminal bushings 5, 6 comprise upper caps l5, l6 and interiorly extending conductor studs 5a, 6a, which provide line current to a pair of serially-related arc-extinguishing units, generally designated by the reference numeral 17, and supported laterally from a hollow conduit or high-pressure feed-tube assembly, generally designated by the reference numeral 20.
  • the lower ends of the terminal bushings S, 6 have metallic mounting flanges such as 5b secured thereto, as by cement, and mounting bolts 11 extending through these mounting flanges and into the cooperating tank flanges 13, the latter being secured, as by welding at 21, to holes 22 provided in the upper end of the tank structure 2.
  • a high-pressure gas reservoir 24 which may contain a suitable high-pressure gas 4, such as sulfur hexafluoride (SF gas, at a pressure, say, for example, 220 p.s.i.
  • SF gas sulfur hexafluoride
  • Thermal insulation 25 may be provided about the high-pressure reservoir 24 to prevent liquefaction of the high-pressure gas 4 at a low ambient temperature.
  • a supporting metal tube 26 Extending downwardly from the high-pressure tank structure 24 is a supporting metal tube 26, which may be secured to a flange 27, itself secured, as by bolts 28, to a supporting flange designated by the reference numeral 29 and secured, as by welding 30, in an opening 31 provided at the upper end of the tank 2.
  • a hollow insulating conduit or feed-tube 32 Disposed below the supporting flange 29 is a hollow insulating conduit or feed-tube 32, which has its lower end secured, as by a cemented attachment 33, within a casting 34 having four openings therein.
  • the lateral openings 34a, 34b are interconnected by laterally extending insulating supports 35, which secure fixedly in position a blast valve and contact housing 36, illustrated more in detail in FIGS. 2-5 of the drawings.
  • the conduit casting 34 may have a downwardly extending insulating feed-tube 37, which supports a control valve, generally designated by the reference numeral 39, and serving to control the entrance of high-pressure gas to, or an exhausting therefrom, from the bottom of a piston 41, which reciprocates within an operating cylinder 42, and providing movement of a movable tubular vented contact, designated by the reference numeral 44.
  • An electrical tie-bar 42a electrically interconnects the units 17 and assists in supporting the operating cylinders 42.
  • the movable contact 44 makes separable contacting engagement with a relatively stationary contact structure 46, and, during the opening operation of the interrupter 1, draws an are 48 therebetween.
  • This arc 48 is extinguished by a flow of high-pressure gas 4 past a differential blast valve 50 and issuing through an orifice, or an arcing chamber, designated by the reference numeral 52, and directing the flow of high-pressure gas 4 interiorly within the movable tubular vented contact 44.
  • FIGS. 6 and 7 illustrate diagrammatically the pneumatic operation of the control valve 39.
  • FIG. 1 it will be apparent that there are provided two circuit-breaker units 17, only one of which is shown, simultaneously actuated and providing two series breaks within the interrupter 1.
  • the movable contacts 44 move downwardly to a position illustrated by the dotted lines in FIG. 1, and designated by the reference numeral 57. Also reference may be made to FIG. in this connection.
  • the insulating operating rod 54 moves downwardly and effects actuation of the control valve 39 to exhaust pressure from below the actuating pistons 41, and thereby permit the high pressure gas, existing in the space above the operating pistons 41, to force the pistons 41 downwardly within the operating cylinders 42.
  • This causes both movable tubular contacts 44 to move downwardly separating from the stationary finger contacts 46.
  • a high-pressure chamber 36 is mounted at some convenient place within the breaker tank 2 and in line with the moving contact 44.
  • This chamber 36 is fitted with a blast valve seat 38 and provides a mounting for the orifice 52.
  • a spring biased cylindrical blast valve 50 Within the central cavity of the chamber 36 are positioned a spring biased cylindrical blast valve 50.
  • Fixed to the blast valve 50 is a finger contact assembly 47.
  • two latch assemblies 49 Between the blast valve 50 and contact follower 45 are mounted two latch assemblies 49, which are located 180 apart.
  • FIG. 2 shows the general arrangement of the parts of the operator with the breaker 1 in the closed posi-' tion.
  • the moving contact 44 is engaged in the finger contacts 47 and the spring biased follower 45 is in contact with the upper end of the moving contact 44.
  • the blast valve 50 is closed.
  • FIGS. 3-5 show the sequence of operations of the various parts.
  • the moving contact 44 is extracted from the contact fingers 47. Being spring loaded, the contact follower 45 moves downwardly with the moving contact 44. This movement of the contact follower 45 rotates the latch assemblies 49 by means of teeth 53 provided on the body of the follower 45 engaging the latches 49. This rotation of the latches 49 lifts the blast valve 50 off of its seat 38, and moves it in the opposite direction of the contact follower and moving contact.
  • the contact fingers 47 move with the blast valve 50 as one unit.
  • the second contact hump 56 behind the tip of the finger contact 47 provides a contact point for engagement on the contact follower.
  • the arcing during interruption, is confined to the tips of the moving contact 44 and contact follower 45 which are lined with arc-resistant material.
  • the high pressure gas behind it causes the blast valve 50 to move rapidly upwardly to its fully open position.
  • the areas exposed to high pressure are arranged such as to have a total force applied to them greater than that of the low pressure side plus the spring loads of the contact follower 45 and blast valve 50.
  • the latches 49 are so designed as to allow the teeth 53 on the follower 45 to ratchet over them in the opposite direction.
  • FIG. 4 shows the blast valve 50 in its fully open position.
  • the springs on the follower 45 and blast valve 50 overcome the equalizer pressure and move the blast valve 50 and contact follower 45 as a unit downwardly to the closed position as shown in FIG. 5.
  • This is the closed position of the blast valve 50 and also the final position of the contact follower 45 when the breaker l is in the fully open position.
  • the moving contact 44 engages the contact follower 45 and moves it upwardly to its reset or breaker-closed position, as shown in FIG. 2.
  • the insulating operating rod 54 is moved upwardly and thereby effects operation of the control valve 39 to place high-pressure gas below the piston 41. This will force the movable tubular contact 44 upwardly into contacting engagement with the relatively stationary contact structure 46, thereby completing the electrical circuit through the circuit breaker 1.
  • the closed circuit position of the device is illustrated in FIG. 1 of the drawings.
  • a compressed-gas circuit interrupter including a grounded metallic tank having a pair of upper tank flanges encompassing openings provided at the upper end of the grounded metallic tank, a pair of stationary nonarcing terminal bushing contacts disposed adjacent the pair of tank openings, a pair of upstanding terminal bushings having lineconductor studs therein, interrupting means including a pair of separable arcing contacts disposed interiorly within said grounded metallic tank and supported independently of said pair of upstanding terminal bushings, said interrupting means supporting said pair of nonarcing terminal-bushing contacts, the lower ends of the line-conductor studs making substantially linear ready separable contacting engagement with said pair of stationary nonarcing terminal-bushing contacts, whereby a ready disassembly of the terminal bushing may be achieved.
  • each terminal bush- I ing includes an insulating outer shell with gas-communication to the interior of the tank, and each line-conductor stud is spaced radially inwardly from the inner wall of the respective insulating shell.
  • a compressed-gas circuit interrupter including a grounded metallic tank with a pair of spaced upstanding terminal bushings extending upwardly from the upper end thereof through a pair of upper tank openings to accommodate the terminal bushings, a pair of stationary nonarcing terminal-bushing contacts disposed adjacent the pair of tank openings, a high-pressure reservoir located between the pair of spaced terminal bushings externally of the tank, a pair of arc-extinguishing units having separable arcing contacts disposed within the tank and electrically connected in series, a high-pressure supporting conduit assemblage depending downwardly from the upper end of the tank and supported from the upper end of the tank interiorly thereof, said highpressure supporting conduit assemblage supporting said pair of arc-extinguishing units laterally thereof and independently from the terminal bushings, said pair of terminal bushings having line-conductor studs therein, said interrupting means supporting said pair of nonarcing terminal-bushing contacts, and the lower ends of the line-conductor studs making substantially linear ready separable contacting
  • each arc-extinguishing unit comprises an operating cylinder and a moving contact piston movable therein, a stationary electrical tie bar supports the lower end of each operating cylinder, and said stationary electrical tie bar is supported at the lower end of the high pressure supporting conduit assemblage.

Landscapes

  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Housings And Mounting Of Transformers (AREA)
US813441A 1969-04-04 1969-04-04 Compressed-gas circuit breaker with readily removable terminal bushing means Expired - Lifetime US3624326A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81344169A 1969-04-04 1969-04-04

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US3624326A true US3624326A (en) 1971-11-30

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US813441A Expired - Lifetime US3624326A (en) 1969-04-04 1969-04-04 Compressed-gas circuit breaker with readily removable terminal bushing means

Country Status (8)

Country Link
US (1) US3624326A (enrdf_load_stackoverflow)
JP (2) JPS5023502B1 (enrdf_load_stackoverflow)
AT (1) AT299366B (enrdf_load_stackoverflow)
BE (1) BE748259A (enrdf_load_stackoverflow)
CH (1) CH505455A (enrdf_load_stackoverflow)
DE (1) DE2014265A1 (enrdf_load_stackoverflow)
ES (1) ES377262A1 (enrdf_load_stackoverflow)
FR (1) FR2042894A5 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL151206B (nl) * 1971-03-05 1976-10-15 Coq Bv Eenpolig schakelveld voor een geheel beschermde elektrische verdeel- en schakelinrichting voor hoge spanning.
JPS552933U (enrdf_load_stackoverflow) * 1978-06-19 1980-01-10
CN113203241B (zh) 2014-12-12 2023-01-13 皇家飞利浦有限公司 用于借助表层水来冷却流体的冷却装置
RU2018107166A (ru) 2015-07-30 2019-08-28 Конинклейке Филипс Н.В. Водяной затвор для предотвращения проникновения воды

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009042A (en) * 1958-04-18 1961-11-14 Westinghouse Electric Corp Circuit interrupters
US3043940A (en) * 1958-01-10 1962-07-10 Westinghouse Electric Corp Compressed-gas circuit interrupter
US3129276A (en) * 1959-05-29 1964-04-14 Westinghouse Electric Corp Gas filled terminal bushing with protective check valve
US3284602A (en) * 1961-12-20 1966-11-08 Westinghouse Electric Corp Compressed-gas circuit interrupters
US3291948A (en) * 1964-08-06 1966-12-13 Westinghouse Electric Corp Orifice structure for compressed gas-circuit interrupter
US3358102A (en) * 1964-08-24 1967-12-12 Westinghouse Electric Corp High-power compressed-gas circuit interrupter with double-flow contact structure disposed within gas-directing casing
US3364327A (en) * 1965-01-21 1968-01-16 Westinghouse Electric Corp Compressed-gas circuit breaker with movable orifice contact and configured flow director about stationary contact assembly
US3495057A (en) * 1967-11-06 1970-02-10 Ite Imperial Corp Dual slide valve with lost motion means for gas blast breaker

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043940A (en) * 1958-01-10 1962-07-10 Westinghouse Electric Corp Compressed-gas circuit interrupter
US3009042A (en) * 1958-04-18 1961-11-14 Westinghouse Electric Corp Circuit interrupters
US3129276A (en) * 1959-05-29 1964-04-14 Westinghouse Electric Corp Gas filled terminal bushing with protective check valve
US3284602A (en) * 1961-12-20 1966-11-08 Westinghouse Electric Corp Compressed-gas circuit interrupters
US3291948A (en) * 1964-08-06 1966-12-13 Westinghouse Electric Corp Orifice structure for compressed gas-circuit interrupter
US3358102A (en) * 1964-08-24 1967-12-12 Westinghouse Electric Corp High-power compressed-gas circuit interrupter with double-flow contact structure disposed within gas-directing casing
US3364327A (en) * 1965-01-21 1968-01-16 Westinghouse Electric Corp Compressed-gas circuit breaker with movable orifice contact and configured flow director about stationary contact assembly
US3495057A (en) * 1967-11-06 1970-02-10 Ite Imperial Corp Dual slide valve with lost motion means for gas blast breaker

Also Published As

Publication number Publication date
JPS5023502B1 (enrdf_load_stackoverflow) 1975-08-08
DE2014265A1 (de) 1970-10-15
JPS51707B1 (enrdf_load_stackoverflow) 1976-01-10
BE748259A (fr) 1970-08-31
CH505455A (de) 1971-03-31
AT299366B (de) 1972-06-12
ES377262A1 (es) 1972-06-16
FR2042894A5 (enrdf_load_stackoverflow) 1971-02-12

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