EP0308847A1 - 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
EP0308847A1
EP0308847A1 EP88115314A EP88115314A EP0308847A1 EP 0308847 A1 EP0308847 A1 EP 0308847A1 EP 88115314 A EP88115314 A EP 88115314A EP 88115314 A EP88115314 A EP 88115314A EP 0308847 A1 EP0308847 A1 EP 0308847A1
Authority
EP
European Patent Office
Prior art keywords
core
winding
bowl
coil according
magnetic
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
EP88115314A
Other languages
English (en)
French (fr)
Other versions
EP0308847B1 (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
Alstom SA
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 Alstom SA, GEC Alsthom SA filed Critical Alstom 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 relates to a magnetic blow coil by rotation of the arc for the contact element of an electric switch, such as a contactor or circuit breaker.
  • the invention is applicable, in particular in devices of this type used for medium voltages, from 3 to 40 kV.
  • a generally cylindrical conductive cuvette connected to a current inlet, a winding arranged in said cuvette and one end of which is connected to the cuvette, to produce a magnetic field along the axis of the cup, a conductive core connected to the other end of the winding and located in the center of the winding, as well as a cut-off contact, placed in front of the coil, relative to said cup, in the magnetic field that it produces and electrically connected to said core.
  • Specific means must be provided to prevent the coil from exploding under the effect of a short-circuit current when the switch is opened.
  • 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.
  • the winding is formed using a flat conductor, wound on the core, over several turns, at the same time as an insulating sheet, means being provided for placing this winding under radial compression.
  • the core is, according to a proposed embodiment, provided with an axial slot in which a key is introduced.
  • the conductor of the winding begins with a part introduced into the slot of the core and clamped between the latter and the key, which, moreover, electrically connects the winding to the core.
  • the insulating sheet is made of fiberglass impregnated with curable resin, to resist pressure.
  • the winding is surrounded by a split ring.
  • the conductor of the winding is extended without insulation by the slot of the split ring and is wound thereon.
  • the winding and its split ring are compressed in the bowl, to give the whole a great mechanical resistance.
  • the coil is also electrically connected to the bowl.
  • the conductive bowl internally comprises a steel bowl, while the core is also made of steel.
  • the core is finally fixed to the bottom of the bowl by a screw, an insulator being provided for crossing the bowl.
  • An arc track is formed on a conductive disc carried by the core and electrically and mechanically connected to the core by the screw.
  • 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, made of 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, by 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, 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 a 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 mity 14 of the conductor 8 is thus electrically connected to the bowl 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)
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
FR8713131 1987-09-23
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

Publications (2)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718281A1 (fr) * 1994-03-30 1995-10-06 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.

Families Citing this family (6)

* 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
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511238A1 (de) * 1974-03-14 1975-09-25 Fuji Electric Co Ltd Elektrischer schalter mit ringfoermigen schaltstuecken und einer blasspule
FR2285700A1 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Dispositif de coupure
EP0012048A1 (de) * 1978-11-10 1980-06-11 Merlin Gerin Schalter mit rotierendem Lichtbogen
EP0019320A1 (de) * 1979-05-11 1980-11-26 BBC Aktiengesellschaft Brown, Boveri & Cie. Schalter mit kreisendem Lichtbogen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511238A1 (de) * 1974-03-14 1975-09-25 Fuji Electric Co Ltd Elektrischer schalter mit ringfoermigen schaltstuecken und einer blasspule
FR2285700A1 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Dispositif de coupure
EP0012048A1 (de) * 1978-11-10 1980-06-11 Merlin Gerin Schalter mit rotierendem Lichtbogen
EP0019320A1 (de) * 1979-05-11 1980-11-26 BBC Aktiengesellschaft Brown, Boveri & Cie. Schalter mit kreisendem Lichtbogen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718281A1 (fr) * 1994-03-30 1995-10-06 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.

Also Published As

Publication number Publication date
DE3882186D1 (de) 1993-08-12
ES2042671T3 (es) 1993-12-16
NO174945C (no) 1994-08-03
FR2620854A1 (fr) 1989-03-24
DE3882186T2 (de) 1993-10-14
EP0308847B1 (de) 1993-07-07
CA1308433C (fr) 1992-10-06
NO884186D0 (no) 1988-09-21
NO174945B (no) 1994-04-25
US4918268A (en) 1990-04-17
ATE91358T1 (de) 1993-07-15
NO884186L (no) 1989-03-28

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