EP0101371A1 - Elektrischer Schalter mit rotierendem Lichtbogen - Google Patents

Elektrischer Schalter mit rotierendem Lichtbogen Download PDF

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Publication number
EP0101371A1
EP0101371A1 EP83401612A EP83401612A EP0101371A1 EP 0101371 A1 EP0101371 A1 EP 0101371A1 EP 83401612 A EP83401612 A EP 83401612A EP 83401612 A EP83401612 A EP 83401612A EP 0101371 A1 EP0101371 A1 EP 0101371A1
Authority
EP
European Patent Office
Prior art keywords
arc
fixed contact
contact assembly
annular electrode
switch according
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.)
Granted
Application number
EP83401612A
Other languages
English (en)
French (fr)
Other versions
EP0101371B1 (de
Inventor
Olivier Bouilliez
Michel Imbert
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT83401612T priority Critical patent/ATE18961T1/de
Publication of EP0101371A1 publication Critical patent/EP0101371A1/de
Application granted granted Critical
Publication of EP0101371B1 publication Critical patent/EP0101371B1/de
Expired 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field

Definitions

  • a known switch of the kind mentioned requires low opening control energy, the magnetic arc blowing field being derived from the current to be interrupted.
  • the core is formed by a tubular metal part made of ferromagnetic material delimiting the gas circulation duct.
  • This duct has a circular section and serves as a housing for an organ for absorbing the products of decomposition of the blowing gas.
  • This member is arranged between two metal grids for the purpose of purifying and cooling the blowing gases. The presence of this absorption member in the conduit nevertheless precludes an efficient circulation of the gas in the direction of exhaust with possible formation of an ionized gas plug in the arc zone.
  • the coil is coaxially surrounded by a ferromagnetic tubular yoke extended by a deflector arranged around the extension zone of the arc.
  • This deflector protects the envelope against the effects of the arc, but opposes gas circulation from the outside of the fixed contact assembly. As a result, the breaking capacity of such a switch is limited.
  • the object of the present invention is to remedy these drawbacks and to enable the production of an efficient rotating arc switch.
  • the arc extension zone located at the front of the fixed contact assembly communicates freely with the opposite posterior zone both from the inside and from the outside of said assembly, the first gas path from the inside taking place through said intervening conduit and the second path from outside / between said fixed contact assembly and the internal wall of the envelope.
  • the present invention starts from a different design in that it increases on the one hand the magnetic blowing, that is to say the rotation of the arc, by providing a ferromagnetic core inside the coil. and that it also avoids any zone of stagnation of ionized gases in the central zone confined by the arc.
  • the gases subjected to the action of the arc can escape freely on both sides of the arc towards colder zones of the enclosure whose volume total is thus used. This gas flow does not blow the arc.
  • the core is preferably connected in series with the blow coil to maintain the magnetic blow during a switching of the arc on the core.
  • the exhaust duct can be formed inside the tubular core or between the internal face of the coil and the external face of a solid core of a smaller diameter or, of course, by a combination of these means.
  • the longitudinal profile of the exhaust duct is preferably shaped as a nozzle having a neck to which a convergent is connected upstream and a diverging downstream to promote flow in the direction of exhaust out of the arc zone.
  • the blowing coil is surrounded on the outside by a magnetic field reinforcement yoke and the opposite electrode has gas circulation orifices.
  • FIG 1 similar to that of European patent application No. 53.524, we recognize the sealed envelope 10 containing an enclosure 12 filled with a gas with high dielectric strength, such as sulfur hexafluoride.
  • a gas with high dielectric strength such as sulfur hexafluoride.
  • the casing 10 also contains arcing contacts constituted by two annular electrodes 24, 26, arranged face to face and tangentially to the pivoting path of the end of the movable shunt contact 20.
  • the annular electrode 24 belongs to a fixed assembly 28 comprising an annular coil 30 associated with the rear face of the electrode 24 and fixed to a support 32.
  • a ferromagnetic core 34 in the form of an olive is disposed inside the coil 30, the front face or end 36 being close to the annular electrode 24.
  • the core 34- is mounted at its rear part on a fixing plate 38 fixed by studs 40 to the support 32 with interposition insulating washers 42.
  • the studs 40 pass through the coil 30 and are welded to the rear of the annular electrode 24.
  • Such an assembly is described in French Patent No. 2,464,550 and allows the ferromagnetic core 34 to be isolated from the support 32, so as to maintain the blowing circuit 30 in the event of striking of the arc on the core 34.
  • the coil 30 is connected between the support 32 and the annular electrode 24.
  • the diameter of the core 34 is smaller than the internal diameter of the coil 30, so as to provide an annular duct 44 allowing gas to escape through the fixed assembly 28.
  • the olive shape of the core 34 defines a nozzle with converging inlet 46 and diverging outlet 48 facilitating an escape of gases from the arc zone adjacent to the annular electrode 24.
  • a flow in the opposite direction towards the annular electrode 24 is on the other hand braked.
  • a cylinder head 50 can be arranged outside the coil 30.
  • the presence of the core 34 and possibly of the yoke 50 makes it possible to increase the intensity of the magnetic blowing field of the arc anchored on the annular electrode 24 and to cause its extinction.
  • the gases heated and ionized by the action of the arc in the vicinity of the annular electrode 24 can circulate freely outwards and inwards, escaping through the conduit formed by the interval 44. This thus avoids any stagnation of ionized gases in the central part of the fixed contact assembly 28 capable of hindering the extinction of the arc or of causing re-strikes.
  • This circulation has no direct blowing effect on the arc itself and only participates indirectly in cutting the current.
  • the choice of the section of the exhaust duct 44 and of the core 34 results from a compromise between the need to have a section of iron sufficient for a reinforcement of the magnetic field and a section sufficient for the exhaust of the gas in order not to brake the gas circulation too much.
  • Figure 3 similar to Figure 2, illustrates a variant embodiment of the fixed contact assembly 28 in which a gas exhaust duct 52 is formed inside a hollow core 54.
  • the duct 52 is arranged in the form of a nozzle facilitating the evacuation of gases from the arc zone and it is clear that the operation is absolutely identical to that described above with reference to FIG. 2.
  • the evacuation through the core 54 can be combined with an evacuation of the type represented in FIG. 2, of the coil.
  • the annular electrode 26 opposite the electrode 24 has orifices 56 allowing the gases to escape from the central zone confined by the rotating arc.
  • the gas circulation device according to the invention can of course be applied to any other type of rotary arc switch, for example of the type described in French patent no. 2 4 64.550, and the invention is not limited to the mode of implementation more particularly described, but it extends to a switch in which the core 34, 54 is not at the same potential as the annular electrode 24, or that in which the structure of the assembly fixed contact would be different. It is noted that the first path of the gas from the inside takes place through the conduit 44, 52, while the second path from the outside takes place between the fixed contact assembly 28 and the internal lateral wall of the envelope. 10.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc Welding Control (AREA)
EP83401612A 1982-08-10 1983-08-04 Elektrischer Schalter mit rotierendem Lichtbogen Expired EP0101371B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401612T ATE18961T1 (de) 1982-08-10 1983-08-04 Elektrischer schalter mit rotierendem lichtbogen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8214032 1982-08-10
FR8214032A FR2531804B1 (fr) 1982-08-10 1982-08-10 Interrupteur electrique a arc tournant

Publications (2)

Publication Number Publication Date
EP0101371A1 true EP0101371A1 (de) 1984-02-22
EP0101371B1 EP0101371B1 (de) 1986-04-02

Family

ID=9276822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401612A Expired EP0101371B1 (de) 1982-08-10 1983-08-04 Elektrischer Schalter mit rotierendem Lichtbogen

Country Status (9)

Country Link
US (1) US4532392A (de)
EP (1) EP0101371B1 (de)
JP (1) JPS5929315A (de)
AT (1) ATE18961T1 (de)
AU (1) AU559591B2 (de)
CA (1) CA1219025A (de)
DE (1) DE3362794D1 (de)
FR (1) FR2531804B1 (de)
IN (1) IN159740B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542918A1 (fr) * 1983-03-15 1984-09-21 Merlin Gerin Interrupteur a arc tournant a circulation des gaz ionises

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5464956A (en) * 1994-04-08 1995-11-07 S&C Electric Company Rotating arc interrupter for loadbreak switch

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB375309A (en) * 1931-03-18 1932-06-20 Electr & Allied Ind Res Ass Improvements relating to electric switches and circuit breakers
DE2511238A1 (de) * 1974-03-14 1975-09-25 Fuji Electric Co Ltd Elektrischer schalter mit ringfoermigen schaltstuecken und einer blasspule
FR2271652A2 (en) * 1974-05-13 1975-12-12 Bbc Brown Boveri & Cie Gas blast cct. breaker - has aperture partitions, each with piston coupled to moving contact and having nozzle port
FR2325214A1 (fr) * 1975-09-22 1977-04-15 Amp Inc Appareil et procede de connexion de fils conducteurs a des cosses de contact
FR2385213A1 (fr) * 1977-03-24 1978-10-20 Mitsubishi Electric Corp Interrupteur de circuit perfectionne
FR2447091A1 (fr) * 1979-01-18 1980-08-14 Sprecher & Schuh Ag Disjoncteur a gaz comprime
EP0053524A1 (de) * 1980-11-17 1982-06-09 Merlin Gerin Elektrischer Schalter mit Selbstblasung durch Lichtbogenrotation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858015A (en) * 1972-09-15 1974-12-31 Gen Electric Electric circuit breaker of the gas blast type

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB375309A (en) * 1931-03-18 1932-06-20 Electr & Allied Ind Res Ass Improvements relating to electric switches and circuit breakers
DE2511238A1 (de) * 1974-03-14 1975-09-25 Fuji Electric Co Ltd Elektrischer schalter mit ringfoermigen schaltstuecken und einer blasspule
FR2271652A2 (en) * 1974-05-13 1975-12-12 Bbc Brown Boveri & Cie Gas blast cct. breaker - has aperture partitions, each with piston coupled to moving contact and having nozzle port
FR2325214A1 (fr) * 1975-09-22 1977-04-15 Amp Inc Appareil et procede de connexion de fils conducteurs a des cosses de contact
FR2385213A1 (fr) * 1977-03-24 1978-10-20 Mitsubishi Electric Corp Interrupteur de circuit perfectionne
FR2447091A1 (fr) * 1979-01-18 1980-08-14 Sprecher & Schuh Ag Disjoncteur a gaz comprime
EP0053524A1 (de) * 1980-11-17 1982-06-09 Merlin Gerin Elektrischer Schalter mit Selbstblasung durch Lichtbogenrotation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542918A1 (fr) * 1983-03-15 1984-09-21 Merlin Gerin Interrupteur a arc tournant a circulation des gaz ionises

Also Published As

Publication number Publication date
ATE18961T1 (de) 1986-04-15
US4532392A (en) 1985-07-30
AU559591B2 (en) 1987-03-12
JPS5929315A (ja) 1984-02-16
AU1782183A (en) 1984-02-16
CA1219025A (en) 1987-03-10
FR2531804B1 (fr) 1985-06-07
EP0101371B1 (de) 1986-04-02
IN159740B (de) 1987-06-06
FR2531804A1 (fr) 1984-02-17
DE3362794D1 (en) 1986-05-07

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