EP0308847B1 - Magnetische Blasspule mit Lichtbogenrotation für Schaltelement eines elektrischen Schalters - Google Patents

Magnetische Blasspule mit Lichtbogenrotation für Schaltelement eines elektrischen Schalters Download PDF

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Publication number
EP0308847B1
EP0308847B1 EP88115314A EP88115314A EP0308847B1 EP 0308847 B1 EP0308847 B1 EP 0308847B1 EP 88115314 A EP88115314 A EP 88115314A EP 88115314 A EP88115314 A EP 88115314A EP 0308847 B1 EP0308847 B1 EP 0308847B1
Authority
EP
European Patent Office
Prior art keywords
core
winding
cup
magnetic
coil 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.)
Expired - Lifetime
Application number
EP88115314A
Other languages
English (en)
French (fr)
Other versions
EP0308847A1 (de
Inventor
Daniel Pothieux
Bernard Gallix
Julien Llorens
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom 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 GEC Alsthom SA filed Critical GEC Alsthom SA
Priority to AT88115314T priority Critical patent/ATE91358T1/de
Publication of EP0308847A1 publication Critical patent/EP0308847A1/de
Application granted granted Critical
Publication of EP0308847B1 publication Critical patent/EP0308847B1/de
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
    • H01H33/18—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
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H33/185—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts

Definitions

  • the present invention refers to a magnetic blowing coil by rotation of the arc according to the preamble of claim 1.
  • a magnetic blowing coil by rotation of the arc according to the preamble of claim 1.
  • Such a coil is known for example from document EP-A-0 019 320.
  • the coil according to this document is welded at one end to the bowl, while its other end is extended outwards.
  • the coil is compressed and held in place by an insulating ring of high tensile strength, the outside diameter of which is adapted to low tolerance for the dimensions of the bowl.
  • it seems difficult to ensure by such a ring a precise mechanical fixing of a winding whose final dimensions are likely to vary widely due to manufacturing tolerances.
  • EP-A-0 012 048 also discloses a magnetic blowing coil which is inserted without play in its housing between an internal ferrule and an external ferrule of a carcass.
  • the invention aims to provide simple and easy means to implement to give the winding of the coil a high mechanical strength. Incidentally, these means make it possible to establish in a simple and reliable manner the electrical contacts with the two ends of the winding. Finally, the coil is suitable for inexpensive production.
  • the contact element of Figure 1 shown in section along its axis XX ', is generally of circular symmetry. It is arranged in a medium switch voltage, such as a circuit breaker.
  • This device comprises, in an enclosure filled with a dielectric gas such as sulfur hexafluoride, means for supporting the fixed part of the contact element, as well as means for moving and guiding the mobile part of the element of contact. These means are well known in the art and will therefore not be described.
  • the fixed part of the contact element which comprises, from the outside to the inside, a cup 1, of conductive metal such as copper, comprising a connection electrode 33, an inside cup 6, in magnetizable metal such as steel, a ring 9, in malleable metal such as aluminum, a winding 23 of a conductive strip 8, in copper foil, wound at the same time as an insulating strip 10, for example in polyester resin loaded with glass fiber, a core 7, in magnetizable metal such as steel and a fixing screw 22, also in steel.
  • the outer end 14 of the conductive strip 8 is in electrical contact with the bowl 1. Its inner end 12 is in electrical contact with the core 7, which is also conductive of electricity.
  • An insulating sleeve 11 electrically isolates the screw 22 and the core 7 of the bowl 1.
  • a nut 35 is screwed onto the end of the screw 22. It bears on the insulating sleeve 11.
  • the core 7 carries, retained by the screw 22, a disc 21 of conductive metal, for example of copper, or of copper-chromium alloy, on which an arc track 3, in tungsten or copper-tungsten alloy, is arranged.
  • the free surface of this arc track is in front of the circular edge 31 of the bowl 1.
  • the movable part of the contact element is shown in the closed position, to the left of the axis XX ′, and in the open position, to the right of this axis. It includes a cup 2, of conductive metal such as copper, provided an internal stop 19 and terminated by a circular edge 32 intended to come into abutment against the edge 31 of the bowl 1.
  • This section contains, pushed by a compression spring 36, a movable breaking contact comprising a friction ring 18 , a movable disc 15 enclosed by the friction ring 18 and an arc track 4 similar to the arc track 3 and facing the latter.
  • a flexible conductor 17 connects the movable breaking contact to the bottom of the section 2.
  • An electrode 37 is connected to the outside of the section 2.
  • the cup and the bowl are in electrical contact by their respective edges 31, 32, which establishes the main current path between the electrodes 33 and 37, at low resistance, short-circuiting the coil and the breaking contact.
  • the contacts are open and the electrodes 33 and 37 are isolated from one another.
  • the circuit breaker mechanism (not shown) pulls section 2 down.
  • the cut-off contact remains closed, while the cut 2 moves away from the cup 1.
  • a current is therefore established, between the electrodes 33 and 37, through the cup 1, the internal cup 6, l winding 23, the core 7, the disc 21, the arcing tracks 3 and 4 always in contact with each other, the movable disc 15, the conductor 17, the section 2 and the electrode 37.
  • the spring 36 gradually relaxes, until the ring 18 comes to bear against the stopper 19. At this time, the disc 15 moves away from the disc 21. An arc strikes between the two discs. It maintains the current in the winding 23 of the coil. This generates a magnetic field circulating in the inner bowl 6, the core 7 and the screw 22, in order to close at 5, in the form of a radial field having a component perpendicular to the arc struck between the tracks 3 and 4. As is well known, this causes the rotation of the arc along tracks 3 and 4 and helps to extinguish it, until the spacing of tracks 3 and 4 relative to each other is such that all current is interrupted.
  • the core 7 has a wide slot 41, in which the inner end is engaged 12 not isolated from the conductor 8 of the winding, as well as a wedge 16, wedge-shaped.
  • the winding is enveloped by a ring 9 also split, at 42, and the end 14 of the conductor 8 is led by this slot so as to pass over the ring and to complete an almost complete turn on this one.
  • the winding and ring assembly is compressed in the bowl 6.
  • the end 12 of the conductor 8 is placed in the slot 41, the key 16 is put in place, then the conductor 8 and the insulating sheet 10 are wound under tension on the core 7, the screw 22 being absent.
  • the ring 9 is then put in place.
  • the assembly is inserted into the bowl 6, under the effect of a press which presses on the bottom of the bowl 6 and on the ring 9. The latter bears against the bowl and is compressed, deforms plastically and compresses in turn, on the one hand, the end 14 of the conductor 8 against the cup 6 and, on the other hand, the winding 23 against the core 7.
  • the end 14 of the conductor 8 is thus electrically connected to the cuvette 6.
  • the end 12 of the conductor 8 is crushed against the slot 41 and is brought into electrical contact with the core 7.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Power Conversion In General (AREA)

Claims (8)

  1. Magnetische Blasspule aufgrund einer Drehung des Lichtbogens für ein Kontaktelement eines elektrischen Trennschalters, mit insbesondere einem leitenden zylindrischen Gehäuse (1), das mit einem Stromanschluß verbunden ist, einer Wicklung (8), die in dem Gehäuse angeordnet ist und mit einem Ende an das Gehäuse angeschlossen ist, um ein magnetisches Feld in Richtung der Gehäuseachse zu erzeugen, mit einem leitenden Kern (7), der mit dem zweiten Ende der Wicklung verbunden ist und im Zentrum der Wicklung sitzt, sowie mit einem ortsfesten Trennkontakt, der vor der Spule in dem von ihr erzeugten elektrischen Feld liegt und mit dem Kern elektrisch verbunden ist, wobei die Wicklung aus einem flachen Leiter besteht, der auf den Kern in mehreren Windungen gemeinsam mit einer isolierenden Folie aufgewickelt ist und der Kern (7) einen axialen Spalt aufweist, in den ein Klotz (16) eingefügt ist, um das zweite Ende (12) der Wicklung (8) elektrisch an den Kern (7) anzuschließen, dadurch gekennzeichnet, daß die Wicklung (8) von einem gespaltenen Ring (9) aus nachgiebigem Metall wie z.B. Aluminium umgeben ist, wobei das erste Ende (14) der Wicklung durch den Spalt (42) des Rings (9) verläuft und die Wicklung (8) und der Ring (9) bei der Montage komprimiert werden, um in das Gehäuse (1) hineinzugelangen.
  2. Magnetische Blasspule nach Anspruch 1, dadurch gekennzeichnet, daß der Leiter (8) der Wicklung mit einem nicht isolierten Teil (12) beginnt, der in den Spalt (41) des Kerns (7) eingefügt ist und zwischen diesem und dem Klotz (16) eingespannt wird, wodurch die Wicklung elektrisch an den Kern angeschlossen wird.
  3. Magnetische Blasspule nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, daß die Isolierfolie aus mit einem härtbaren Harz imprägnierten Glasfasern besteht.
  4. Magnetische Blasspule nach Anspruch 1, dadurch gekennzeichnet, daß der Leiter (8) der Wicklung ohne Isolierung durch den Spalt des gespaltenen Rings (9) hindurch verlängert und um diesen gewickelt ist.
  5. Blasspule nach Anspruch 1, dadurch gekennzeichnet, daß das leitende Gehäuse innen ein magnetisches Gehäuse (6) enthält.
  6. Magnetische Blasspule nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Kern (7) aus Stahl ist.
  7. Magnetische Blasspule nach Anspruch 6, dadurch gekennzeichnet, daß der Kern (7) am Boden des Gehäuses (6) mit einer Schraube (22) befestigt ist, wobei ein Isolierkörper (11) für den Durchgang der Schraube durch das Gehäuse vorgesehen ist.
  8. Magnetische Blasspule nach Anspruch 7, dadurch gekennzeichnet, daß der Trennkontakt eine leitende Scheibe (21) aufweist, die vom Kern (7) getragen wird und elektrisch und mechanisch mit dem Kern (7) über die Schraube (22) verbunden ist.
EP88115314A 1987-09-23 1988-09-19 Magnetische Blasspule mit Lichtbogenrotation für Schaltelement eines elektrischen Schalters Expired - Lifetime EP0308847B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88115314T ATE91358T1 (de) 1987-09-23 1988-09-19 Magnetische blasspule mit lichtbogenrotation fuer schaltelement eines elektrischen schalters.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8713131A FR2620854A1 (fr) 1987-09-23 1987-09-23 Bobine de soufflage magnetique par rotation de l'arc pour element de contact d'un interrupteur electrique
FR8713131 1987-09-23

Publications (2)

Publication Number Publication Date
EP0308847A1 EP0308847A1 (de) 1989-03-29
EP0308847B1 true EP0308847B1 (de) 1993-07-07

Family

ID=9355139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115314A Expired - Lifetime EP0308847B1 (de) 1987-09-23 1988-09-19 Magnetische Blasspule mit Lichtbogenrotation für Schaltelement eines elektrischen Schalters

Country Status (8)

Country Link
US (1) US4918268A (de)
EP (1) EP0308847B1 (de)
AT (1) ATE91358T1 (de)
CA (1) CA1308433C (de)
DE (1) DE3882186T2 (de)
ES (1) ES2042671T3 (de)
FR (1) FR2620854A1 (de)
NO (1) NO174945C (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718281B1 (fr) * 1994-03-30 1996-04-26 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.
US5464956A (en) * 1994-04-08 1995-11-07 S&C Electric Company Rotating arc interrupter for loadbreak switch
DE19904932C1 (de) * 1999-02-06 2000-10-26 Felten & Guilleaume Ag Löschspule zum Einsatz in gasisolierten Lasttrenn- oder Leistungsschaltern
US6100491A (en) * 1999-06-25 2000-08-08 Eaton Corporation Electric current switching apparatus having an arc extinguisher with an electromagnet
FR2824182A1 (fr) * 2001-04-26 2002-10-31 Alstom Disjoncteur a arc tournant a aimant permanent
US6943313B2 (en) * 2001-10-22 2005-09-13 S & C Electric Co. Rotating arc fault-current interrupter
FR3019934B1 (fr) * 2014-04-14 2017-12-08 Alstom Technology Ltd Disjoncteur a arc tournant comportant une bobine inductrice a tenue elevee

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50121775A (de) * 1974-03-14 1975-09-23
FR2285700A1 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Dispositif de coupure
US4052577A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Magnetically driven ring arc runner for circuit interrupter
US4259554A (en) * 1978-01-11 1981-03-31 Electric Power Research Institute Thin arc runner for arc spinner interrupter
FR2441261A1 (fr) * 1978-11-10 1980-06-06 Merlin Gerin Interrupteur a arc tournant
US4315121A (en) * 1979-05-11 1982-02-09 Gould Inc. Saturable magnetic steel encased coil for arc spinner interrupter

Also Published As

Publication number Publication date
DE3882186T2 (de) 1993-10-14
NO174945C (no) 1994-08-03
FR2620854A1 (fr) 1989-03-24
ATE91358T1 (de) 1993-07-15
CA1308433C (fr) 1992-10-06
NO884186D0 (no) 1988-09-21
ES2042671T3 (es) 1993-12-16
EP0308847A1 (de) 1989-03-29
NO884186L (no) 1989-03-28
NO174945B (no) 1994-04-25
US4918268A (en) 1990-04-17
DE3882186D1 (de) 1993-08-12

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