US2551772A - High-tension interrupting device - Google Patents

High-tension interrupting device Download PDF

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Publication number
US2551772A
US2551772A US762369A US76236947A US2551772A US 2551772 A US2551772 A US 2551772A US 762369 A US762369 A US 762369A US 76236947 A US76236947 A US 76236947A US 2551772 A US2551772 A US 2551772A
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Prior art keywords
cylinder
elements
contact
support
movable
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Expired - Lifetime
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US762369A
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English (en)
Inventor
Thibaudat Albert
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Forges et Ateliers de Constructions Electriques de Jeumont SA
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Forges et Ateliers de Constructions Electriques de Jeumont SA
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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
    • H01H33/88—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
    • H01H33/90—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 this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/904—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 this movement being effected by or in conjunction with the contact-operating mechanism characterised by the transmission between operating mechanism and piston or movable contact
    • 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
    • H01H33/16—Impedances connected with contacts
    • H01H33/167—Impedances connected with contacts the impedance being inserted only while opening the switch

Definitions

  • the invention also has for an object increasn the breaking power of pneumatic disconnec- 11 devices operating without a separated compressor, simplifying their construction and permitting their operation with relatively high tensions.
  • A. further object of the present invention is to A- further object of the invention is to provide means whereby the first movement is a rapid rectilinear translation, suificient for the complete interruption of the controlled circuit, while the second is a rotation of the movable parts.
  • pneumatic extinguishing When pneumatic extinguishing is applied it preferably takes place'only during the first movement.
  • a still further object of the invention is to avoid not only the disadvantages indicated above but also secure several new advantages which will beset forth below in the description of the structural examples which relate to disconnecting switches operating under load and circuit breakers having an are blowing system'with' concentric channels operating without separate-compressors.
  • FIG. 1 is aside'elevational view with parts in section of one form of the invention showing the contacts in closedposition.
  • Fig. 2 is a side elevational viewwith parts in section showing the position of the elementsat the termination of the first translational movement for securing the actual interruption of the circuit.
  • Fig. 3 is a view similar to-Fig. 2 illustrating the position'of the elements in the completely open or safety disconnection position.
  • Fig. 4 is a partial cross sectional view on a larger scale of the contacts.
  • FIG. 5 is a side elevational view with portions broken away and with a partial wiring diagram of a modified construction
  • Fig. 6 is aviea similar to Fig. 5 of a still further modification.
  • theporcela-in insulator I supports the group of fixed contacts 2 comprising the main contacts 3 and the resilient interrupting contact :3 shown in Fig. 4.
  • the porcelaininsulator 5 supports the pivot 6 for the movable elements. These elements are formed essentially by a metallic tube '5 closed by a plug 1A and carrying the piston 23 as well as the movable cylinder 2 which may be displaced with relation to the piston 8.
  • the. length of the cylinder 9 is, rela tively small comparedto its diameter.
  • The/cylinder is constantly urged towards the pivot; 6 by a strong concentric spring it whose-. J-Pperend. is attached to an enlargement I I provided-upon the 3 upper portion of the cylinder.
  • the lower end of the spring iii is attached to the ring i2 which is fixed by two cars 52A to the common pivot 6.
  • the cover 9A of the cylinder 9 (Fig. 4) carries the movable contact it of tubular form which cooperates with the main contacts 3.
  • the tubular contact l3 whose end i3 may be made of an insulating material as shown is the conducting tuce it whose upper end i l of reinforced construction cooperates with the re silient interrupting contact
  • the contact 4 carrying a guide rod ll has fixed thereto the insulating element t whose lower surface is in contact with the end it of the tube 13.
  • the elements l, i" and d are urged downwards by a compression spring as shown; the downward movement of the contact 4 is limited by a stop upon the upper end of 4".
  • the conducting tube it is fixed to the elements ii and it. It has at its lower portion some longitudinal slots [5, Fig. 1, while the tube I has in the neighborhood of these slots some apertures 55 which open into the extension ll of the cylinder 9 arranged to'slide along the tube '5.
  • the extension ll carries two hinges l8 (Figs. 2 and 3) to which are attached two links 59, connected to the upper ends of the two angular levers whose lower ends are driven by the insulated connecting rod 2i.
  • This connecting rod is actuated by an appropriate control mechanism not shown, or by hand.
  • the whole device is connected to the controlled circuit by the leads M and N fixed upon the terminals m and n.
  • the operation of the apparatus may be carried out by hand as a disconnecting switch or automatically as a circuit breaker.
  • a disconnecting switch or automatically as a circuit breaker.
  • the movable elements occupying the completely opened position shown upon Fig. 3 a lever or wheel (not shown) is manually operated to strain a spring (not shown) and to move the insulating connecting rod 2
  • the lever 29 passes from the position A to the position B and all the movable elements swing freely as a unit towards the axis EB (Fig. 3) to reach the position shown upon Fig. 2.
  • the rotation of the tube i is stopped by the abutment 22 provided upon the lower porcelain support 5. This rotation which has no resistance to overcome takes place slowly and its termination by the abutment 22 carried out without shock.
  • the operating lever is turned by hand or by a control wheel (not shown) in the opposite direction which liberates the spring (not shown) mentioned above and this spring rapidly moves the angular lever 20 into the position C.
  • the toggle joint l9, 2!] straightens and raises the hinges liiwith the cylinder 8, it which slides upwardly along the tube 7 while stretching the spring IS.
  • the end it of the contact tube i3 contacts the element 4' the end Hi of the tube It contacts the resilient contact i.
  • the elements 4 and i are raised and the tube i3 penetrates into the assemblyz while establishing the definite connection with the main contacts 3 (Fig. 1).
  • the angular lever 28 is preferably moved into the position C which is adjacent the position D of the dead point but without passing it.
  • the apparatus then tends to open automatically and the insulating con" necting rod 2! is subjected to a small compression force. It may then be retained in this position (shown upon Fig. 1) by an appropriate looking device which may be unlocked by hand, by a relay, by interrupting a control circuit or by any other means.
  • the control mechanism of the insulating connecting rod 2i may comprise any known means which will secure a free tripping.
  • any appropriate pneumatic elements such as suitable inlets or valves (not shown) are provided and are arranged to open during the upward movement of the cylinder 9 and prevent any pneumatic braking at closing.
  • any appropriate locking means such as cams, pawls, etc., may be provided to prevent the premature straightening of the toggle joint 29, I9 during movement through the course A-B. This precaution is not indispensable since the correct succession of movements is assured through the considerable force of the spring H] which only comes into play during movement through the course B-C.
  • the unlocking is brought about according to this case, either by a slight displacement towards the left of the insulating connecting rod 2! when the dead point of the toggle joint has been passed during the course of closing or by the unlocking of the locking device (not shown) when the dead point has been reached.
  • the apparatus passes quickly from the position of Fig. 1 to that of Fig. 2.
  • the lever 26 passes from position C to position B, the cylinder 9 urged by the spring it) moves downward and the outside tube 13 leaves the main contacts 3 after which the tubular contact Hi separates from the resilient interrupting contact 4 producing the interruption arc.
  • These slots 15 are provided in order to maintain open the apertures 56 when the cylinder 9 and its inner tube M are in the lowest position, so that the space under the piston 8 is always in communication with the opening of the contact element M.
  • the equipment shown comprises two fixed contact elements 2
  • Fig. 5 shows the apparatus in the locked position irr'which the circuit is closed and the opening means such as the springs mentioned" above are strongly strained.
  • the opening means are released which rapidly displaces the cylinders 29 and withtheir tubular contact elements 21' and 23 towards the pivot 34.
  • the elements 21 and'28 are followed by'the resilient contact elements 2 l and 22' and the air filling the cylinders 29' and 30 is subjected to a rapid. compression'by the pistons 3
  • the resistance. 36' maybe connected 'between 22j and 40 for example.
  • The-two movable units 27,29, 31. and 23, 30.38, carry out in 'thisrarrangement separate imovements in order to occupy finally. the disconnecting positions shown in dotted lines'at G andIG'.
  • the mechanism designed for producing the successive movements of" the movable elements may be analogous to that of Figs. 1 to 3 or bearranged in any other appropriate way.
  • thecorrect succession of the-various interrupting and disconnecting movements may be secured with the aid of appropriate cams and thereby eliminate the springs which are attached directly to the movable cylinders.
  • -A resilient element for actuating the cylinders for the first movement corresponding to the interrupting-of the arcs may be in this case locatedin th'ecom moncont-rol mechanism and. may be arranged to intervene only during the corresponding movement.
  • the pistons may be displaced to-secure the extinctionof the arcs by a' rectilinear. Movement of the contacts 2 l andi22 so-as to space them from the blowing elements 2'! and 28 afterwhi'ch the disconneciion rnay be secured by an appropriate displacement of the elements 2
  • blowing method described may be modified.
  • cylinders and pistons may be eliminated or replaced with the action of .a gas. produced in a. known manner by suitable bodiesunder. the efiect of thearc, etc.
  • two or more successive. rectilinear movements may also be used.
  • One movement with the blast may be rapid, for example. and the other slow.
  • two or more successive rotative movements, or the interruption may be carried. out by rotation. and the disconnectionby translation. It is obvious that other vmodificationsare possible.
  • the mechanical forces are only applied during a portion of the travel (through BC) which reduces by a very large proportion the mechanical energy accumulated and facilitates operation of the apparatus.
  • the control is carried out through the intermediary of an insulating connecting rod 2! which is only exposed to traction efiorts or compression which permits lightening the construction and securing a greater security.
  • the porcelain supports for the movable elements are not subjected to violent shocks which also increases the security of operation.
  • control elements shown and not shown such as the connecting links, locking devices, etc., may be diminished in weight and simplified.
  • the pneumatic blowing elements being reduced in weight and oumbersomeness in that they only come into action during a short interruption'travel permit the inertia of the movable elements to be reduced and the circuit interruption to be rapid.
  • blowing elements having an appropriate diameter and being located very close to the contacts, the blowing action acts very rapidly and upon separation of the contacts, it attains full efiiciency.
  • disconnection means the separation of the contacts to a safe position such as shown in Fig. 3.
  • a high tension circuit interrupter comprising a fixed contact and a movable contact, said movable contact comprising a pivotally mounted support, a piston on said support, a cylinder for said piston slidable on said support, coaxial tubular members fixed to said cylinder forming the contact elements cooperating with said fixed contact, means for moving said cylinder and contact elements toward and away from said fixed contact in a rapid rectilinear movement to bring about the actual interruption and closure of the-circuit, said movement causing a relative movement between said piston and cylinder placing air under pressure which is expelled through said tubular members for extinguishing the are formed upon the interruption of the circuit and means for swinging said support and associated elements to disconnection position at the termination of the rectilinear interrupting movement.
  • a high tension circuit interrupter comprising a fixed contact and a movable contact, said movable contact comprising a pivotally mounted support, a piston on said support, a cylinder for said piston slidable on said support, coaxial tubular members fixed to said cylinder forming the contact elements cooperating with said fixed contact, resilient means interconnecting said cylinder and support, toggle means for moving said cylinder and contact elements to closure position and thereby placing said resilient means under tension, means for releasing said toggle means so that said cylinder is retracted rapidly along said support by said resilient means said movement causing a relative movement between said piston and cylinder placing air underpressure which is expelled through said tubular members for extinguishing the are formed upon the interruption of the circuit and means for swinging said support and associated elements to disconnection position at the termination of the rectilinear interrupting movement.
  • a high tension circuit interrupter comprising a fixed contact and a movable contact, said movable contact comprising a pivotally mounted support, a piston on said support, a cylinder for said piston s'lidable on said support, coaxial tubular members fixed to said cylinder forming the contact elements cooperating with said fixed contact, resilient means interconnecting said cylinder and support, toggle means for moving said cylinder and contact elements to closure position and thereby placing said resilient means under tension, means for releasing said toggle means so that said cylinder is retracted rapidly along said support by said resilient means said movement causing a relative movement between said piston and cylinder placing air under pressure which is expelled through said tubular members for extinguishing the are formed upon the interruption of the circuit, the inner coaxial member of said coaxial tubular members having communication with the suction side of said piston so that a suction is also exerted to extinguish said arc and means for pivoting said support and associated elements to disconnection position at the termination of the rectilinear interrupting movement.
  • a high tension circuit interrupting and disconnecting device comprising a fixed contact and a co-operating movable contact unit, said contact unit being formed by a pivotally mounted support, a piston fixed upon said support, a cylin der for said piston slidable on saidpiston, coaxial nozzle members carried by said cylinder and forming the movable contact proper and means for positively separating said movable contact from said fixed contact first in a rapid rectilinear translation to bring about the actual interruption of the circuit by a rapid contact separation and by an air blast resulting from the relative movement of said cylinder, and then in a slower rotation of said support and of the associated contact unit in order to further increase the said contact separation.
  • a high tension circuit interrupting and disconnecting device having a fixed contact and a cooperating movable contact unit, said unit comprising a pivotally mounted support, a piston on said support, a movable cylinder cooperating with said piston, coaxial tubular members fixed to said cylinder and forming a movable contact, resilient elements interconnecting said cylinder and support, positive mechanical means for moving said cylinder with the said associated movable con tact into the closed position and thereby placing said resilient elements under tension and means for releasing said resilient elements, whereby said movable contact and cylinder are first retracted rapidly along said support producing air blasts through said tubular members for extinguishing the are formed upon the separation of contacts, said mechanical means being arranged for producing after said retracting movement a rotation of said support and of its associated elements in order to further increase the separation of said contacts.
  • a high tension circuit breaking and disconnecting device comprising two fixed contacts and two cooperating movable contacts connected in series, each of said movable contacts comprising a pivotally mounted support, a piston on “said support, a cylinder for said piston slidable on said support, coaxial tubular members fixed to said cylinder forming the contact elements cooperating with said fixed contact, resilient means interconnecting said cylinder and sup-port, toggle means for moving said cylinder and contact elements to closure position and thereby placing said resilient means under tension, means for re leasing said toggle means so that said cylinder is retracted rapidly along said support by said resilient means, said movement causing a relative movement between said piston and cylinder placing under pressure the air which is expelled through said tubular members for extinguishing the are formed upon the interruption of the circuit, the inner coaxial member of said coaxial tubular members having communication with the suction side of said piston so that a suction is also exerted to extinguish said arc, and means for pivoting said support and associated elements to disconnection position at the
  • a high tension circuit breaking and disconnecting device comprising two fixed contacts, two cooperating movable contacts and a pivotally mounted support carrying both said movable contacts, each of which comprises a piston on said supports, a cylinder for said piston slidable on said support, coaxial tubular members fixed to said cylinder forming the contact elements cooperating with said fixed contact, resilient means interconnecting said cylinder and support, toggle means for moving said cylinder and contact elements to closure position and thereby placing said resilient means under tension, means for releasing said toggle means so that said cylinder is retracted rapidly along said support by said resilient means, said movement causing a relative movement between said piston and cylinder placing air under pressure which is expelled through said tubular members for extinguishing the are formed upon the interruption of the circuit, the inner coaxial member of said coaxial tubular members having communication with the suction side of said piston so that a suction is also exerted to extinguish said are, and means for pivoting said support and associated elements to disconnection position at the termination of the rectilinear interrupting
  • a circuit interrupting and disconnecting device comprising a movable contact including an axial conducting tube forming the contact element proper and an annular channel, positive mechanical driving means to effect during the circuit interruption a rapid arc interrupting translation of said movable contact, as well as a less rapid transverse disconnecting movement of the same contact, a cylinder supporting said movable contact, a cooperating piston, means for displacing said cylinder with respect to said piston during said translation only, and means for interconnecting respectively both parts of said cylinder with said conducting tube and said annular channel, whereby an air-blast and an air-suction are produced.
  • a high tension circuit interrupting and disconnecting device comprising a fixed contact and a cooperating movable contact structure including a tubuiar element, an axial conducting tube forming the contact element proper and an annular channel surrounding said tube, said movable contact having pivotally mounted support, a piston fixed upon said support, a movable cylinder for said piston, carrying said movable contact structure, the said tube being connecte: to one part of said cylinder and the said annular channel being connected to the other part or said cylinder, resi'iient members interconnecting said cylinder and support, mechanical means for positively operating said cylinder and movable contact to a position in which said resilient means are placed under tension and the circuit is closed, means for releasing said resilient members vhereby two successive movements are produced, the first being a rapid translation resulting in a separation of the contacts and producing an air blast through said annular channel and an air suction through said conducting tube in order to extinguish the arc, and the second being a pivotal rotation of said support adapted to increase substantially the separation
  • a high tension circuit breaker comprising a fixed contact and a. cooperating movable contact, said movable contact comprising a pivotally mounted support, a piston on said support, a cylinder for said pistonslidable on said support, coaxial tubular members fixed to said cylinder forming the movable contact elements cooperating with said fixed contact, means for moving said cylinder and tubular members away from said fixed contact in a rapid rectilinear movement to bring about the actual opening of the circuit, means upon said fixed contact adapted to close said tubular members on a part of said rectilinear movement, whereby the air filling said cylinder is compressed until said tubular members are opened and said compressed air is expelled through said tubular members for extinguishing the arc of interruption of the circuit, and means for swinging said support and associated elements to disconnection position at the end of said rectilinear movement, whereby the distance between said cooperating contacts is further increased.

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US762369A 1946-05-21 1947-07-21 High-tension interrupting device Expired - Lifetime US2551772A (en)

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FR850315X 1946-05-21

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US (1) US2551772A (en(2012))
BE (1) BE473294A (en(2012))
DE (1) DE850315C (en(2012))
FR (2) FR928563A (en(2012))
NL (1) NL72111C (en(2012))

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604562A (en) * 1949-01-29 1952-07-22 Gen Electric Electric circuit interrupter
US2678983A (en) * 1950-05-16 1954-05-18 Westinghouse Electric Corp Compressed gas circuit interrupter
US2682591A (en) * 1952-05-24 1954-06-29 Porter Co Inc H K Interrupter shield
US2739207A (en) * 1951-09-28 1956-03-20 Westinghouse Electric Corp Circuit interrupters
US2788418A (en) * 1954-03-22 1957-04-09 Gertrude M Idzkowski Circuit interrupter
US2855487A (en) * 1955-03-14 1958-10-07 Asea Ab Oil circuit breaker with two extinguishing chambers
US2889434A (en) * 1951-10-26 1959-06-02 Westinghouse Electric Corp Switching device
US2933575A (en) * 1956-10-22 1960-04-19 Westinghouse Electric Corp Circuit interrupters
US2964602A (en) * 1956-04-02 1960-12-13 Joe Davidson Snap acting mechanism
US2981814A (en) * 1957-01-22 1961-04-25 Westinghouse Electric Corp Circuit interrupters
US3158723A (en) * 1960-03-16 1964-11-24 Oerlikon Engineering Company Arc-extinguishing means for power switches having stationary and movable contact pieces
US3527912A (en) * 1967-01-09 1970-09-08 Merlin Gerin Gas blast circuit breaker
US3824360A (en) * 1971-08-06 1974-07-16 Siemens Ag Compressed gas electrical circuit breaker
US4229632A (en) * 1977-07-25 1980-10-21 Siemens Aktiengesellschaft Compress gas circuit breaker

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444333A1 (fr) * 1978-12-11 1980-07-11 Merlin Gerin Interrupteur a autosoufflage a mise en depression de la chambre de coupure
CH656976A5 (de) * 1981-06-30 1986-07-31 Bbc Brown Boveri & Cie Kompressionskolbenschalter.
ATE161356T1 (de) * 1991-05-24 1998-01-15 Giampietro Tosi Schwefelhexafluoridisolierter mittelspannungsschalter mit drei positionen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US525332A (en) * 1894-04-14 1894-09-04 Electric switch
US1563833A (en) * 1919-12-05 1925-12-01 Electrical Engineer S Equipmen High-tension air-break switch
US2039838A (en) * 1934-03-09 1936-05-05 Saudicoeur Louis Joseph Compressed air circuit breaker with movable piston
US2264862A (en) * 1940-01-10 1941-12-02 Gen Electric Electric switch
US2279024A (en) * 1939-01-20 1942-04-07 Gen Electric Electric circuit interrupter
US2286131A (en) * 1939-09-20 1942-06-09 Westinghouse Electric & Mfg Co Disconnecting switch
US2429311A (en) * 1942-07-30 1947-10-21 Gay Maurice Jean Circuit breaker with blowing device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US525332A (en) * 1894-04-14 1894-09-04 Electric switch
US1563833A (en) * 1919-12-05 1925-12-01 Electrical Engineer S Equipmen High-tension air-break switch
US2039838A (en) * 1934-03-09 1936-05-05 Saudicoeur Louis Joseph Compressed air circuit breaker with movable piston
US2279024A (en) * 1939-01-20 1942-04-07 Gen Electric Electric circuit interrupter
US2286131A (en) * 1939-09-20 1942-06-09 Westinghouse Electric & Mfg Co Disconnecting switch
US2264862A (en) * 1940-01-10 1941-12-02 Gen Electric Electric switch
US2429311A (en) * 1942-07-30 1947-10-21 Gay Maurice Jean Circuit breaker with blowing device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604562A (en) * 1949-01-29 1952-07-22 Gen Electric Electric circuit interrupter
US2678983A (en) * 1950-05-16 1954-05-18 Westinghouse Electric Corp Compressed gas circuit interrupter
US2739207A (en) * 1951-09-28 1956-03-20 Westinghouse Electric Corp Circuit interrupters
US2889434A (en) * 1951-10-26 1959-06-02 Westinghouse Electric Corp Switching device
US2682591A (en) * 1952-05-24 1954-06-29 Porter Co Inc H K Interrupter shield
US2788418A (en) * 1954-03-22 1957-04-09 Gertrude M Idzkowski Circuit interrupter
US2855487A (en) * 1955-03-14 1958-10-07 Asea Ab Oil circuit breaker with two extinguishing chambers
US2964602A (en) * 1956-04-02 1960-12-13 Joe Davidson Snap acting mechanism
US2933575A (en) * 1956-10-22 1960-04-19 Westinghouse Electric Corp Circuit interrupters
US2981814A (en) * 1957-01-22 1961-04-25 Westinghouse Electric Corp Circuit interrupters
US3158723A (en) * 1960-03-16 1964-11-24 Oerlikon Engineering Company Arc-extinguishing means for power switches having stationary and movable contact pieces
US3527912A (en) * 1967-01-09 1970-09-08 Merlin Gerin Gas blast circuit breaker
US3824360A (en) * 1971-08-06 1974-07-16 Siemens Ag Compressed gas electrical circuit breaker
US4229632A (en) * 1977-07-25 1980-10-21 Siemens Aktiengesellschaft Compress gas circuit breaker

Also Published As

Publication number Publication date
FR928563A (fr) 1947-12-02
NL72111C (en(2012))
BE473294A (en(2012))
FR56787E (fr) 1952-10-06
DE850315C (de) 1952-09-22

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