US2205321A - Electric circuit breaker - Google Patents

Electric circuit breaker Download PDF

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Publication number
US2205321A
US2205321A US271763A US27176339A US2205321A US 2205321 A US2205321 A US 2205321A US 271763 A US271763 A US 271763A US 27176339 A US27176339 A US 27176339A US 2205321 A US2205321 A US 2205321A
Authority
US
United States
Prior art keywords
conduit
gas
insulator
insulating
high voltage
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
US271763A
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English (en)
Inventor
Thieme Paul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2205321A publication Critical patent/US2205321A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches

Definitions

  • My invention relates to electric circuit breakers, more particularly to high voltage circuit breakers of the gas blast type, and has for its principal obj ect the provision of an improved 5 and simplified gas blast circuit breakerthat can be insulated for high voltages and operated through a minimum number and mass of operating elements.
  • the problem Y is essentially that of the contacts, which are at line potential, and insulating the same with respect to the actuating or driving means on a metallic base at been proposed to use tubing and insulating supplying gas pressure to which is usually mounted ground potential. It has insulating gas conduits or linkages including special high voltage insulators for this purpose but such designs in general have proved disadvantageous in view of the additional complexity and cost or the breaker. Also troduced which form creepage surfaces are ina possible path for flashover in a case of high operating potentials.
  • the high voltage gas blast breaker or switch is mounted on insulating the contacts at high potential, and an insulating gas supply conduit is rotatably mounted within said insulator for directly operating an element of the breaker as well as supplying gas pressure thereto.
  • the circuit, breaker ample comprises coac tacts I and 2 arrange umstrad by way of ex ting arc interrupting cond to be connected in series (ol. zoo-14s) l with an isolating or disconnect switch. 3 in the main high voltage power circuit d.
  • the dis- Electric circuitA breaker The dis- Electric circuitA breaker.
  • the contact housing indicated at 'l is provided with a gas passage 'reading to the retractable contact I.
  • gas under pressure is admitted to said passage the contact I is retracted and a gas jet directed into the arc path to extinguish arcing.
  • a shield 9 of suitable design is provided and is located in concentric relation to the contact.
  • the coacting contact 2 can be of the simple butt type mounted on an insulating support It.
  • the disconnect switch blade 6 and the contact housing 'l are mounted at the upper part of a ceramic insulator II of the high voltage type.
  • the insulator 'Il is of shell-like construction for receiving centrally thereof an insulating gas supply conduit I2 leading to the gas passage t.
  • the insulating conduit I2 is rotatably mounted with the coupling I3 atk its lower end, and at its upper end is secured to a coupling I4 which forms van extension of the conduit and continuous gas passage to the housing l.
  • 'I 'he coupling I4 which is rigidly secured to the conduit I2 is rotatably mounted at I5 in an end cap I6 which is suitably secured by means of a mounting flange I'I to the upper part of the insulator II.
  • the end cap I6 can'comprise an integral part of the housing 1 and also serves as a bearing support for switch.
  • the coupling I4 is provided with a worm gear drive at I4' corresponding gear pivoted switch arm arranged to coact with teeth 6' connected to the 6. Accordingly, rotation of the conduit I2 ls effective to operate the disconnect switch arm 6 either to open or closed position without disturbing or supply line to the arc interrupting contacts.
  • the contact structure at I including the housing 1 can, if desired, be swung in a horizontal direction where it is desired to isolate the ing conduit I2 contacts in this manner.
  • the coupling Il would simply be rigidly secured to the contact structure or housing l, which in turn would be rotatably mounted with respect to the supporting end cap I6.
  • the insulator Il is suitably mounted at I9 on a metallic base structure 20 which serves to house ,the .operating structure and gas supply conduits for the breaker.
  • the lower coupling member I3 to which the conduit I2 is also rigidly secured is provided at its lower end with a stub gear 2
  • the piston 23 is mounted forreciprocal movement within a cylinder 24 that is connected to suitable valve controlled gas supply conduits 25 and 2G for controlling reciprocal movement of the piston. Accordingly, when gas under pressure is admitted to the cylinder 24 from either gas line, the conduit I2 is rotated about its'longitudinal axis to operate the disconnect switch 3 correspondingly.
  • coupling I3 is provided with radially extending gas passages I3' for communicating with the supply line 21 when the conduit I2 is in different angular positions with respect-thereto,
  • the operation of the circuit breaker is as follows: Assuming that the breaker is in the closed position shown and an opening operation is in order, a supply of gasv under pressure is admitted under the control of suitable valve means indicated at V in the pressure line 2l to the insulating conduit I2 and breaker contact structure I.
  • the arc interrupting operation ⁇ is usually very rapid so that the isolating operation-can follow after a very brief interval.
  • the isolating operation is eiected by admitting gas under pressure by way of the valve controlled conduit 25 to the piston 23 for'operating the conduit I2 and opening the disconnect switch in the manner above described.
  • Thecircuit is now open and isolated and the contacts Igand 2 can return to closed position if desired.
  • the arc contacts can if desired be opened by a brief gas blast from the line 2l, at which time the disconnect switch is closed by gas pressure from the line 2G.
  • the control oi the various gas valves for the lines 25, 2t, and E'iform no part of the present invention and may comprise either manual or remote electrical control relays, or both as desired.
  • a gas blast circuit breaker comprising rela-4 tively movable contact structure including arc interrupting contacts, a high voltage insulatorfor supporting a. movable element of said struclture, said insulator being iixed, an insulating gas supply conduit positioned within said insuvlator along the longitudinal axis thereof land rotatably mounted with respect to its longitudinal axis, means related to said conduit and communicating with a source of gas pressure for directing gas to said arc interrupting contacts,
  • a gas blast circuitl breaker comprising relatively.movable contact structure including are interrupting contacts, Aa stationary high voltage insulator vertically positioned and adapted to support a movable element of said contact structure at the upper. part of said insulator, said invsulator being hollow, an insulating gas supply conduit vertically positioned within said insulainterrupting contacts and isolating mea-ns, a sta,
  • tionary high voltage insulator for supporting said contact structure, said insulator being hollow, an insulating gas supply conduit mounted within said insulator for relative movement with respect thereto, means operatively connecting said conduit to said isolating means for operation thereof in accordance with movement of said conduit, and 'coupling means coacting with said conduit to form a continuous gas passage from a source of gas pressure to said arc interrupting contacts during movement of said conduit. and means for actuating said insulating conduit.
  • a gas blast circuit breaker comprising relatively movable contact structure including arc interrupting and movable isolating contact members, a high voltage insulator of shell-like construction vertically positioned for supporting said contact members at the upper part thereof, an insulating gas supply conduit vertically positioned within said insulator, means for mounting said conduit for rotation about its longitudinal axis, and a mechanical connection between said conduit and said movable isolating member for operating the sa-me in accordance with rotation of said conduit, coupling means associated with said conduit arranged to form a continuous gas passage between a source of gas pressure and said arc interrupting contacts, said coupling means being operative in varying angular positions of said conduit, and actuating means for rotating said conduit independently of operation of said arc interrupting contact,
  • a gas blast circuit breaker comprising relatively 4movable contact structure including arc interrupting means and a disconnect switch having a pivoted switch arm, a high voltage insulator vertically'positioned for supporting at its upper end said arc interrupting means and said disconnect switch arm, said insulator being hollow, an insulating conduit positioned within said insulator and mounted for rotatable movement with respect thereto, a mechanical connection between said conduit and said switch arm for operating the same in accordance with rotation of said conduit, coupling means related to said conduit for forming a continuous gas passage between a. source of gas supply and said arc interrupting means mounted on said insulator, and pneumatic means for rotating" said conduit independentlyl of said arc interrupting means.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
US271763A 1938-05-19 1939-05-04 Electric circuit breaker Expired - Lifetime US2205321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE210275X 1938-05-19

Publications (1)

Publication Number Publication Date
US2205321A true US2205321A (en) 1940-06-18

Family

ID=5796528

Family Applications (1)

Application Number Title Priority Date Filing Date
US271763A Expired - Lifetime US2205321A (en) 1938-05-19 1939-05-04 Electric circuit breaker

Country Status (3)

Country Link
US (1) US2205321A (de)
CH (1) CH210275A (de)
GB (1) GB529015A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558757A (en) * 1947-07-19 1951-07-03 Allis Chalmers Mfg Co Multibreak gas blast circuit breaker with grounded operating motor
US3052783A (en) * 1957-07-19 1962-09-04 Siemens Ag Compressed-gas circuit interrupters
US3364328A (en) * 1964-08-07 1968-01-16 Oerlikon Maschf Fluid pressure actuated electric power circuit breaker
US3435166A (en) * 1965-11-16 1969-03-25 Gen Electric Gas blast circuit breaker with improved resistor switch
US3846601A (en) * 1972-03-31 1974-11-05 Westinghouse Electric Corp Compressed-gas circuit interrupter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558757A (en) * 1947-07-19 1951-07-03 Allis Chalmers Mfg Co Multibreak gas blast circuit breaker with grounded operating motor
US3052783A (en) * 1957-07-19 1962-09-04 Siemens Ag Compressed-gas circuit interrupters
US3364328A (en) * 1964-08-07 1968-01-16 Oerlikon Maschf Fluid pressure actuated electric power circuit breaker
US3435166A (en) * 1965-11-16 1969-03-25 Gen Electric Gas blast circuit breaker with improved resistor switch
US3846601A (en) * 1972-03-31 1974-11-05 Westinghouse Electric Corp Compressed-gas circuit interrupter

Also Published As

Publication number Publication date
CH210275A (de) 1940-06-30
GB529015A (en) 1940-11-12

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