US2500429A - Electric gas blast circuit breaker - Google Patents

Electric gas blast circuit breaker Download PDF

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Publication number
US2500429A
US2500429A US647864A US64786446A US2500429A US 2500429 A US2500429 A US 2500429A US 647864 A US647864 A US 647864A US 64786446 A US64786446 A US 64786446A US 2500429 A US2500429 A US 2500429A
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United States
Prior art keywords
piston
contact
contacts
rod
gas
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Expired - Lifetime
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US647864A
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English (en)
Inventor
Nijland Hendrik A Hidde
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Individual
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Individual
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Publication of US2500429A publication Critical patent/US2500429A/en
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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
    • H01H33/83—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 wherein the contacts are opened by the flow of air or gas

Definitions

  • This invention 4 relates to .improvements in electric circuit breakers particularly of the type :in which a gas .blast is vused ifor extinguishing the .arc between vthe contacts.
  • An object of the invention is to provide a construction wherein the pressure of a :gas is utilized to initiate the breaking of the circuit and then after the circuit has been broken vand the arc ⁇ extinguislfled the .contacts are separated a safe distance .by independently operated means which alsoclose the contacts.
  • a further object is to provide a construction in which the contacts are in the form of a valve so as to .control the outlet for the extinguishing gas.
  • a still further object of the invention is to provide a construction wherein the movement of the .above mentioned piston is relatively small so that the size of the .cylinderl containing the arcing chamber is reduced.
  • a further object is Ato .provide ⁇ a ⁇ construction wherein one of the .contact Aelements may be withdrawn or inserted into the circuit breaker While the fixed terminal contacts remain energived and the arcing chamber and piston for initiating the circuit break ⁇ rernain in place.
  • a still further object is to provide a simplified construction wherein the .usual provision of two separate circuit breakers in series is eliminated.
  • Fig. 1 is a longitudinal sectional view of a circuit breaker according to the linvention with the contacts'in closed position.
  • Fig. 2 is a similar view of a modified con struction.
  • Fig. k3 is a similar -view ofthe vconstruction shown in Fig. 2 4with the parts in the position which they occupy after the initial break of the circuit.
  • Fig. 4 is a similar yview ofzthe construction shown in Fig. 2 with ⁇ the parts in the position which they occupy after thecontacts have been rmoved -to a safe distancerfrom one another, and
  • Fig. 5 is ra diagrammaticview with :parts in elevation of the complete device-illustrating :the
  • zoo-14s means for moving the contacts to a safe distance and for closing the contacts.
  • a cylinder Iof insulating material is closed at its lower end by a metal cap which has at vits center -a iixed contact 2 in the forni of a valve seat.
  • a movable rod shaped contact 3 cooperates with the Contact 2 and the contact 3 is in permanent sliding contact with the 'terminal contacts ft arranged in a circular series.
  • the contact 2 through the metal .cap is electrically connected to the terminal ring l' the terminal contacts 4 are electrically connected ⁇ with the terminal ring 8.
  • the rings 7 and 8 areirnounted on the casing 5 which is located within the casing E.
  • and .4i-'i shown in Fig. 5 are connected to the terminal rings.
  • the arci'ng chamber within the cylinder l is closed at its upper end by a cover 9 provided with a conduit il! whereby gas under pressure ⁇ may be introduced into the arcing chamber through the ducts l I.
  • Contact rod 3 is secured to van intermediate rod l5 yby insulating tube I4 constituting an extension of contact rod 3.
  • the rod I5 is recessed at its upper end to slidably t the operating mechanism shown in Fig. 5.
  • the ⁇ rods l5 and i6 are interconnected by recaps of a pin l'l fixed to the rod i6 and the slots I8 provided in the rod i5 thereby providing a limited lost motion connection 'between the rods.
  • a compression spring i9 located within the recess of the rod l5 acting against the end of the rod l5 urges the contact 3 against contact 2 ⁇ when the circuit is closed.
  • a piston 20 Slidably ⁇ mounted upon the rod 'l5 within the cover 5 is a piston 20.
  • Such piston is movable within the cylindrical chamber .2
  • the piston 20 is designed .to be lmoved by the pressure of the gas in the arcing chamber when it reaches a predetermined value upwardly as shown in Fig. 1 and on such upward movment the piston will contact a shoulder r.23 .provided upon .the rod I5.
  • the upward movement of :the ⁇ piston pivoted lever 34 is pivotally connected at one end to the rod I6 and at its other end is pivoted to a fixed part upon the circuit breaker.
  • the lever 34 is actuated by means of a piston 35 slidably mounted within a cylinder 33'.
  • rihe gas for operating the piston 20 and for extinguishing' the arc between contacts 2 and 3 when initially separated is supplied from a pressure tank 40.
  • the valve 3l When the circuit is to be broken the valve 3l is opened which permits gas to flow through the conduit It to the inside of the cir-
  • the piston 20 When the cuit breaker through the ducts II. gas reaches a predetermined pressure the piston 20 is moved upwardly which raises contact 3 a short distance from contact 2 breaking the circuit and gas can then escape through Contact 2 and extinguish the arc.
  • valve 35 At the same time gas will pass through valve 35 and flow to the cylinder i3 to act upon piston 35 which in turn actuates the lever 34 thereby moving the rod I3 upwardly. rhe rod IE5 will then move the contact 3 from its initial separation point to its iinal position at a sate distance from the contact 2.
  • the valve 38 acts as a throttle so that the operation oi piston 35 is delayed with respect to the action of piston 2! which acts imn mediately.
  • Valve 36 may be adjusted to regulate the delayed action desired.
  • the lost motion connection between the rods I5 and i6 provided by the pin Il' and the slots I8 permits the contact 3 to be moved a short dis tance by the piston 20 and thereby bring about the initial separation of contacts 2 and 3 without any movement of the rod IG.
  • the mechanism for breaking the circuit .initially is therefore independent of the operating mechanism for moving the contacts to a safe distance from one another and closing the contacts.
  • the enlarged portion 25 is above the nxed terminal contacts 4.
  • the upper end of the contact rod 3 is further enlarged so as to form an abutment 23' for the piston 20 and has a recessed sleeve portion is? therein which slidably engages the plug 2l with a lost motion connection formed by the pin IT and slots I8'.
  • the plug 2l is secured by an insulating tube 28 to the rod I6.
  • a compression spring I9 is located in the sleeve 26 between the plug 21 and the bottom of the recess.
  • the cylindrical chamber 28' in which the piston 2G' is movable is supported by an insulating tube 2Q secured to the cylinder I.
  • a spring 22 located within the interior 2 I of the chamber 28' bears at one end against the piston 2U and at its other end against the top wall of the chamber 2B.
  • the gas from the tank @lil for initiating the breaking of the circuit and extinguishing the arc is supplied through the space between the cylinder E5 and the cylinder I. Such gas then passes through the openings 3@ provided in the cylinder I in order to reach the arcing chamber.
  • the upward movement of the piston 20' is limited by abutment 24.
  • the lower end of the chamber 28' is partially closed by a ring member 3I having a central opening whose diameter is less than the diameter of the piston 20. In the nonoperating position of the piston 20 this opening is closed by a reduced portion 32 upon the piston 20.
  • gas under pressure flows into the arcing chamber either through the ducts II of the construction shown in Fig. l or through the openings 30 in the modincation shown in Figs. 2, 3, and 4.
  • the piston 20 or 20 is moved upwardly against the pressure of the spring 22 or the spring 22.
  • the construction shown in Figs. 2, 3 and 4 is provided wherein the ring 3
  • the pressure of the gas must reach a predetermined high value in order that the pressure on the reduced portion 32 of the piston 2G becomes sufficient to overcome the action of the spring I9 and thereby move the piston upwardly.
  • the rod i6 the contact rods 3, 3 and the interposed connecting parts are arranged in alignment with one another. Also the diameters of the connecting parts have been so chosen that the diameters increase from the bottom upwardly. Therefore due to this construction the contact rod 3 or d' may be entirely withdrawn from the circuit breaker While the fixed contact 2 and the iixed terminal contacts 4 remain in the circuit breaker.
  • the embodiment as shown in Fig. l has advantage that the piston 20 and associated parts may be mounted directly on the cover of the circuit breaker so as to have earth potential. On the other hand, however, the piston has to lift not only the contact rod 3 but also the insulating tube i4 and the interconnecting rod l5. In the construction as shown in Figs. 2 to l the piston 2D has the same potential as the iixed terminal i contacts Il so that the piston 2li has to be insulated with respect to the earth.
  • An advantage of this construction is that during the breaking of the circuit the piston 20 need only move the contact rod 3 which results in a more rapid interruption oi the circuit.
  • An electric gas blast circuit-breaker comprising an arcing chamber having an inlet and an outlet, a rod-shaped movable contact, a xed contact cooperating with said movable Contact, said movable and said iixed contact being located in said chamber, a source of gas supply under pressure, means connecting said source to said inlet, said movable and fixed contacts forming a valve controlling said outlet so that upon separation of said contacts gas escaping from said chamber through said outlet will extinguish the arc drawn between said contacts, a fixed cylinder having one side in communication with said arcing chamber, an extension upon said movable contact extending through said cylinder, a spring loaded piston slidably mounted in said cylinder and slidable on said extension operable by the pressure of gas entering said chamber, a shoulder on said extension cooperating with said piston to move said extension and said movable contact slightly in one direction to separate said contacts, said piston being independent of said movable contact during all other movements thereof, a stop member arranged in iiXed relation to
  • An electric gas blast circuit breaker as set forth in claim 1 wherein said extension of said movable contact includes an insulator and an intermediate rod, and said circuit breaker includes spaced terminal contacts connected to said movable and iixed contacts, and said movable contact, said lost motion connection, said insulator and said intermediate rod are arranged in alignment with one another and form a composite unit which may be withdrawn from the circuit breaker or inserted thereinto while said terminal contacts remain alive and the cylinder and its piston. remain in place.

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  • Circuit Breakers (AREA)
US647864A 1942-02-19 1946-02-15 Electric gas blast circuit breaker Expired - Lifetime US2500429A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL229955X 1942-02-19

Publications (1)

Publication Number Publication Date
US2500429A true US2500429A (en) 1950-03-14

Family

ID=19779875

Family Applications (1)

Application Number Title Priority Date Filing Date
US647864A Expired - Lifetime US2500429A (en) 1942-02-19 1946-02-15 Electric gas blast circuit breaker

Country Status (7)

Country Link
US (1) US2500429A (ru)
BE (1) BE447471A (ru)
CH (1) CH229955A (ru)
DE (1) DE757030C (ru)
FR (1) FR886989A (ru)
GB (1) GB606860A (ru)
NL (2) NL57563C (ru)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673271A (en) * 1948-04-23 1954-03-23 Reyrolle A & Co Ltd Electric circuit-breaker of the gas-blast type
US2887550A (en) * 1956-02-15 1959-05-19 Coq Nv Gas-blast circuit breakers
US3017482A (en) * 1957-07-01 1962-01-16 British Thomson Houston Co Ltd Air or gas blast electric circuit breakers
US3794798A (en) * 1973-04-27 1974-02-26 F Trayer Submersible switch and double toggle, power transmission member operating mechanism therefore
US3889084A (en) * 1973-09-19 1975-06-10 I T E Corp Contact for high voltage gas blast circuit breaker with time-delayed opening
US3928738A (en) * 1973-04-04 1975-12-23 Siemens Ag Coupling arrangement for a compressed-gas circuit breaker equipped with a hydraulic drive
US4336520A (en) * 1980-07-25 1982-06-22 Trayer Frank C Method and apparatus for short circuit protection of high voltage distribution systems

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1898900A (en) * 1925-05-18 1933-02-21 Ruppel Sigwart Method and apparatus for interrupting high tension circuits
US2125525A (en) * 1935-07-13 1938-08-02 Bbc Brown Boveri & Cie Electric circuit breaker
US2163558A (en) * 1937-04-30 1939-06-20 Westinghouse Electric & Mfg Co Circuit breaker
GB510502A (en) * 1937-12-29 1939-08-02 British Thomson Houston Co Ltd Improvements in and relating to gas blast electric switchgear
US2240233A (en) * 1938-05-27 1941-04-29 Bbc Brown Boveri & Cie Gas blast circuit breaker
US2279536A (en) * 1938-05-27 1942-04-14 Bbc Brown Boveri & Cie Electric circuit breaker

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH190816A (de) * 1936-09-12 1937-05-15 Oerlikon Maschf Schalter mit Lichtbogenlöschung durch ein Druckmittel.
CH214012A (de) * 1939-11-01 1941-03-31 Oerlikon Maschf Elektrischer Schalter mit Lichtbogenlöschung und Bewegung des Düsenkontaktes durch ein strömendes Druckmittel.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1898900A (en) * 1925-05-18 1933-02-21 Ruppel Sigwart Method and apparatus for interrupting high tension circuits
US2125525A (en) * 1935-07-13 1938-08-02 Bbc Brown Boveri & Cie Electric circuit breaker
US2163558A (en) * 1937-04-30 1939-06-20 Westinghouse Electric & Mfg Co Circuit breaker
GB510502A (en) * 1937-12-29 1939-08-02 British Thomson Houston Co Ltd Improvements in and relating to gas blast electric switchgear
US2240233A (en) * 1938-05-27 1941-04-29 Bbc Brown Boveri & Cie Gas blast circuit breaker
US2279536A (en) * 1938-05-27 1942-04-14 Bbc Brown Boveri & Cie Electric circuit breaker

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673271A (en) * 1948-04-23 1954-03-23 Reyrolle A & Co Ltd Electric circuit-breaker of the gas-blast type
US2887550A (en) * 1956-02-15 1959-05-19 Coq Nv Gas-blast circuit breakers
US3017482A (en) * 1957-07-01 1962-01-16 British Thomson Houston Co Ltd Air or gas blast electric circuit breakers
US3928738A (en) * 1973-04-04 1975-12-23 Siemens Ag Coupling arrangement for a compressed-gas circuit breaker equipped with a hydraulic drive
US3794798A (en) * 1973-04-27 1974-02-26 F Trayer Submersible switch and double toggle, power transmission member operating mechanism therefore
US3889084A (en) * 1973-09-19 1975-06-10 I T E Corp Contact for high voltage gas blast circuit breaker with time-delayed opening
US4336520A (en) * 1980-07-25 1982-06-22 Trayer Frank C Method and apparatus for short circuit protection of high voltage distribution systems

Also Published As

Publication number Publication date
GB606860A (en) 1948-08-20
CH229955A (de) 1943-11-30
NL57563C (ru)
NL62336C (ru)
FR886989A (fr) 1943-10-29
DE757030C (de) 1952-08-21
BE447471A (ru)

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