EP0053524B1 - Elektrischer Schalter mit Selbstblasung durch Lichtbogenrotation - Google Patents
Elektrischer Schalter mit Selbstblasung durch Lichtbogenrotation Download PDFInfo
- Publication number
- EP0053524B1 EP0053524B1 EP81401549A EP81401549A EP0053524B1 EP 0053524 B1 EP0053524 B1 EP 0053524B1 EP 81401549 A EP81401549 A EP 81401549A EP 81401549 A EP81401549 A EP 81401549A EP 0053524 B1 EP0053524 B1 EP 0053524B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contacts
- contact
- shunt
- arcing
- movable
- 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
Links
- 238000000926 separation method Methods 0.000 claims description 11
- 230000008033 biological extinction Effects 0.000 claims description 7
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims 1
- 238000007664 blowing Methods 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 210000000941 bile Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Images
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
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
-
- 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
- H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
Definitions
- the invention relates to an electric circuit breaker with self-blowing by rotation according to the preamble of claim 1.
- the document EP-A-0 011 542 describes an electrical circuit breaker of the kind mentioned in which the main circuit is arranged in a quasi-independent manner from the auxiliary breaking circuit inside the sealed enclosure.
- This particular arrangement allows a significant simplification of a pneumatically self-blowing circuit breaker of the type commercially known as FLUARC, and it has proved advantageous to use this technique in rotary arc circuit breakers.
- Rotary arc circuit breakers use a blowing coil inserted in the auxiliary circuit and the increase in the reactance of the auxiliary circuit prevents rapid switching of the current on this auxiliary circuit.
- the document EP-A-0 012 048 relates to a rotary arc switch equipped with main contacts arranged coaxially inside a pair of arcing contacts in the form of annular tracks.
- One of the tracks is attached to the front face of a magnetic blowing coil, electrically connected in series with the arcing contacts.
- the drawn arc switches quickly to the annular tracks by switching on the coil, which blows the arc in rotation on the annular tracks to achieve rapid extinction of the arc.
- the current path through the main contacts is coaxial with that of the arcing contacts and the reactance of the two circuits is almost identical, which facilitates switching of the current from one circuit to the other.
- the proximity of the main contacts and of the arcing contacts presents risks of reclaking on the main contacts and imposes space constraints.
- the object of the present invention is to allow the production of an electric circuit breaker with rotating arc fitted with independent main contacts of a particularly simple structure and this object is achieved by the implementation of the characteristics mentioned in claim 1.
- a shunt circuit allows opening of the circuit breaker in three distinct phases, in this case a first phase of separation of the main contacts with switching of the current on the shunt circuit, a second phase of separation of the shunt contacts with formation of a switching arc and a third phase of transfer of the arc to the arcing contacts with switching on of the blow-off coil imposing a rapid rotation of the arc on the arcing contacts in the form of tracks annulars.
- the movable shunt contact ensures the transfer of the arc to fixed arcing contacts arranged at an optimal extinction distance from the arc.
- a known switch for breaking in the air comprises an assembly consisting of main contacts, arcing contacts and horns for guiding the arc towards a breaking chamber.
- the arcing contacts are shaped so as to avoid premature separation of these contacts, in this case before the extinction of the arcing between the main contacts and the arcing horns are arranged in the immediate vicinity of the contacts. arc to capture the arc displaced by the loop effect from the arc contacts to the horns.
- the three circuits borrowed successively by the current during the opening phase of the switch are substantially parallel and their reactances are almost identical. Switching from one circuit to the other is easily carried out provided that the sequence of opening movements is strictly observed and the subject of the patent is an arrangement imposing this movement sequence.
- the mobile shunting contact is arranged as a pivoting knife mounted for rotation on the same axis as the knife forming the main moving contact.
- the prior separation of the main contacts is advantageously carried out by a particular conformation of the shunt contacts, so as to allow mechanical attachment of the main movable and shunt contacts.
- the arcing contacts are arranged tangentially to the displacement path of the movable shunt contact, so as to pick up the arc and to switch on the blow-off coil immediately after the shunt contacts are separated.
- the movable assembly formed by the main movable and shunt contacts carries a pallet which causes, during its movement during opening of the circuit breaker, a displacement of blowing gas facilitating the transfer of the of the shunt contacts to the arcing contacts.
- Control of the circuit breaker is particularly simple and the mass of the moving element is low, which facilitates rapid separation of the contacts.
- a pole of a self-blowing circuit breaker comprises a sealed envelope 10 made of an insulating material filled with a gas with high dielectric strength, in particular sulfur hexafluoride, under an appropriate pressure.
- Crossings 12, 14 shaped as current supply terminals cross opposite bottoms 16, 18 of the casing 10 and extend along a rectilinear trajectory.
- the bushing 12 carries a main fixed contact 20 capable of cooperating with a movable main contact 22 in the form of a knife pivotally mounted on a fixed axis 24 carried by an extension 26 of the bushing 14.
- the movable main contact 22 is constituted by two knives 22a, 22b, gripping in the closed position of the pads 20a, 20b, constituting the fixed main contact 20.
- On the axis fixed 24 is mounted to rotate a movable shunting contact 28 constituted by a pair of knives 28a, enclosing in the closed position a fixed shunting contact 30 electrically and mechanically connected to the bushing 12 by a support 32.
- the clamping force of the knives, 22a, 22b, 28a is increased by the electrodynamic forces browsing the contacts in a manner well known to specialists.
- the knives 22a, 22b, 28a are mechanically secured by an axis 40 passing through orifices provided in the knives, and on which the end of a control rod 42 is articulated.
- the movable shunting contact 28 is interposed between the knives 22a , 22b of the mobile main contact 22, and it is clear that other operating arrangements can be used and that the main mobile contact or the mobile shunt contact can include a different number of knives, in particular a single knife.
- the control rod 42 is articulated by its end opposite to the crank pin 44 of a crank 46 wedged on a control shaft 48 passing through the wall of the casing 10 and actuated by a control mechanism of any type well known to specialists .
- the main movable contact 22 and the movable shunt contact 28 extend substantially in the rectilinear direction of the bushings 12, 14, ensuring a main current flow circuit practically of minimum length.
- a rotation of the control shaft 48 is transmitted by the connecting rod 42 - crank 46 assembly to the mobile assembly, constituted by the knives 22a, 22b, 28a, so as to rotate these knives on the articulation formed by the axis 24 to an open position, shown in FIG. 4, substantially perpendicular to the initial closed position.
- the knives 28a of the shunt contact 28 have a length greater than that of the knives 22a, 22b of the main contact 22, and the fixed shunt contact 30 offset in height in FIG. 2 relative to the main fixed contacts 22a, 22b, has a part 50 projecting in the direction of the open position relative to the main fixed contacts 20a, 20b.
- This projecting arrangement 50 of the fixed shunt contact 30 allows separation of the main contacts 22, 20 before the separation of the shunt contacts 28, 30 during an opening operation of the circuit breaker.
- the delayed opening of the shunt contacts 28, 30 may of course result from a different conformation of the main contacts 20, 22 or of the movable shunt contact 28, or be produced by a particular arrangement of the control mechanism 46, 42.
- the casing 10 also contains an auxiliary circuit 52, constituted by a fixed arcing contact 54, electrically and mechanically secured by a support 56 at the bushing 14, and a fixed assembly 58 secured by a conductive support 60 at the bushing 12
- the fixed assembly 58 comprises an arcing contact 62 in the form of an annular track arranged opposite and with a fixed spacing from the fixed arcing contact 54, also shaped as an annular track.
- the fixed assembly 58 further comprises a blowing coil 64, constituted by a stack of split discs attached to the rear face of the arcing contact 62.
- the fixed assembly 58 may be of the type described in the document FR-A- 2,464,550, to which reference may be made for further information.
- the coil 64 is connected in series with the arcing contacts 54, 62 in the auxiliary circuit 52.
- the auxiliary circuit 52 is disposed laterally of the main circuit 20, 22, 26 at a sufficient distance for a free movement in direction of the auxiliary circuit 52 of the movable contacts 22, 28.
- the arcing contact 62, associated with the coil 64, is arranged tangentially and at short interval 66, from the projecting part 50 of the fixed shunt contact 30.
- the fixed arcing contact 54 is disposed in a manner analogous to the circular path described by the end of the movable shunt contact 28.
- the main movable contacts 22 and shunt 28 come into the withdrawal position of the arcing contact 54, so as to prevent any re-ignition of the arcing on the movable contacts 22, 28.
- An insulating gap 68 separates the contacts from arc 54, 62 preventing any passage of current in the auxiliary circuit 52 and therefore any supply of the coil 64 in the closed position of the circuit breaker, shown in FIG. 1.
- a plate 70 (fig. 1) whose movement causes a displacement of the gas contained in the envelope 10 in direction of the arcing contacts 54, 62, causing an arc blowing and facilitating the switching of the arc from the shunt contacts 28, 30 to the arcing contacts 54, 62.
- the presence of the blowing plate 70 slightly increases the control energy, but the latter remains relatively low compared to that required for the pneumatic self-blowing device by gas piston.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
Claims (10)
dadurch gekennzeichnet, daß er ein Paar Nebenschlußkontakte (28, 30) aufweist, die in einem an die genannten Hauptkontakte (20, 22) angrenzenden Nebenschluß-Stromkreis angeordnet sind, wobei die genannten Nebenschlußkontakte (28, 30) so ausgebildet sind, daß sie sich nach den genannten Hauptkontakten (20, 22) trennen, um jeglichen Kommutierlichtbogen auf den Hauptkontakten zu vermeiden, und wobei der genannte bewegliche Nebenschlußkontakt (28) sich in der Nähe der genannten Lichtbogenkontakte (54, 62) bewegt, um den auf den getrennten Nebenschlußkontakten gezogenen Lichtbogen auf die genannten Lichtbogenkontakte zu übertragen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8024397 | 1980-11-17 | ||
FR8024397A FR2494493A1 (fr) | 1980-11-17 | 1980-11-17 | Disjoncteur electrique a autosoufflage par rotation de l'arc |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0053524A1 EP0053524A1 (de) | 1982-06-09 |
EP0053524B1 true EP0053524B1 (de) | 1985-01-02 |
Family
ID=9248054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81401549A Expired EP0053524B1 (de) | 1980-11-17 | 1981-10-07 | Elektrischer Schalter mit Selbstblasung durch Lichtbogenrotation |
Country Status (7)
Country | Link |
---|---|
US (1) | US4529853A (de) |
EP (1) | EP0053524B1 (de) |
CA (1) | CA1173088A (de) |
CS (1) | CS226039B2 (de) |
DE (1) | DE3168063D1 (de) |
ES (1) | ES8207657A1 (de) |
FR (1) | FR2494493A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2531804B1 (fr) * | 1982-08-10 | 1985-06-07 | Merlin Gerin | Interrupteur electrique a arc tournant |
FR2554631B1 (fr) * | 1983-11-07 | 1986-09-05 | Merlin Gerin | Interrupteur electrique a arc tournant |
GB8518381D0 (en) * | 1985-07-20 | 1985-08-29 | Y S Securities Ltd | Circuit interrupter |
GB8607397D0 (en) * | 1986-03-25 | 1986-04-30 | Northern Eng Ind | Arc interrupter |
FR2596915B1 (fr) * | 1986-04-03 | 1994-02-18 | Merlin Et Gerin | Disjoncteur electrique a autosoufflage ayant une tenue dielectrique elevee |
FI78195C (fi) * | 1986-10-27 | 1989-06-12 | Stroemberg Oy Ab | Stroembrytare. |
FR2631735B1 (fr) * | 1988-05-17 | 1990-07-27 | Merlin Gerin | Dispositif de reglage d'un interrupteur electrique moyenne tension |
FR2647948B1 (fr) * | 1989-05-31 | 1994-03-04 | Merlin Gerin | Interrupteur electrique a arc tournant |
ES2130239T3 (es) * | 1992-11-26 | 1999-07-01 | Schneider Electric Sa | Mecanismo de apertura y cierre para un interruptor electrico para media o alta tension. |
US5464956A (en) * | 1994-04-08 | 1995-11-07 | S&C Electric Company | Rotating arc interrupter for loadbreak switch |
JP2931862B2 (ja) * | 1995-04-28 | 1999-08-09 | 株式会社戸上電機製作所 | 遮断器の消弧装置 |
FR2735277B1 (fr) * | 1995-06-12 | 1997-07-18 | Schneider Electric Sa | Disjoncteur a moyenne tension et a isolement gazeux |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US592497A (en) * | 1897-10-26 | Contact in shunt for circuit-breakers | ||
US2227507A (en) * | 1938-11-01 | 1941-01-07 | Westinghouse Electric & Mfg Co | Circuit interrupter |
US3032627A (en) * | 1959-03-05 | 1962-05-01 | System Analyzer Corp | Electrical switch |
US3211866A (en) * | 1963-02-05 | 1965-10-12 | Gen Electric | Vacuum type electric circuit interrupter with plural parallel-connected contact points |
US3390239A (en) * | 1965-02-23 | 1968-06-25 | Gen Electric | Electric circuit breaker with voltage-controlling resistances and means for switching the resistances in synchronism |
US3513275A (en) * | 1966-04-14 | 1970-05-19 | Westinghouse Electric Corp | Circuit breaker with improved current path and contact means |
US3471666A (en) * | 1967-04-18 | 1969-10-07 | Gen Electric | Axial blast interrupter with arc-rotating means |
FR1543338A (fr) * | 1967-09-01 | 1968-10-25 | Telemecanique Electrique | Dispositif d'extinction d'arc |
US3593227A (en) * | 1968-02-28 | 1971-07-13 | Gennady Fedosievich Mitskevich | Automatic electrodynamic blowoff breaker with stationary contact form of two series wound u-shaped members |
US3858015A (en) * | 1972-09-15 | 1974-12-31 | Gen Electric | Electric circuit breaker of the gas blast type |
US3780244A (en) * | 1972-10-18 | 1973-12-18 | Gen Electric | Gas blast circuit breaker of the axial blast type |
FR2339244A1 (fr) * | 1976-01-26 | 1977-08-19 | Merlin Gerin | Dispositif d'extinction d'arc |
FR2441261A1 (fr) * | 1978-11-10 | 1980-06-06 | Merlin Gerin | Interrupteur a arc tournant |
FR2441916A1 (fr) * | 1978-11-14 | 1980-06-13 | Merlin Gerin | Disjoncteur electrique a autosoufflage equipe d'un dispositif a contacts principaux perfectionnes |
EP0011972B2 (de) * | 1978-11-28 | 1989-08-23 | South Wales Switchgear Limited | Elektrische Schaltanlage |
-
1980
- 1980-11-17 FR FR8024397A patent/FR2494493A1/fr active Granted
-
1981
- 1981-10-07 DE DE8181401549T patent/DE3168063D1/de not_active Expired
- 1981-10-07 EP EP81401549A patent/EP0053524B1/de not_active Expired
- 1981-10-28 ES ES506650A patent/ES8207657A1/es not_active Expired
- 1981-11-09 US US06/319,284 patent/US4529853A/en not_active Expired - Fee Related
- 1981-11-16 CS CS818428A patent/CS226039B2/cs unknown
- 1981-11-16 CA CA000390185A patent/CA1173088A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0053524A1 (de) | 1982-06-09 |
ES506650A0 (es) | 1982-10-01 |
US4529853A (en) | 1985-07-16 |
CS226039B2 (en) | 1984-03-19 |
CA1173088A (fr) | 1984-08-21 |
FR2494493A1 (fr) | 1982-05-21 |
ES8207657A1 (es) | 1982-10-01 |
DE3168063D1 (en) | 1985-02-14 |
FR2494493B1 (de) | 1983-08-26 |
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