EP0004213A1 - Lichtbogenlöscheinrichtung mit pneumatischer und magnetischer Blasung - Google Patents

Lichtbogenlöscheinrichtung mit pneumatischer und magnetischer Blasung Download PDF

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Publication number
EP0004213A1
EP0004213A1 EP19790400093 EP79400093A EP0004213A1 EP 0004213 A1 EP0004213 A1 EP 0004213A1 EP 19790400093 EP19790400093 EP 19790400093 EP 79400093 A EP79400093 A EP 79400093A EP 0004213 A1 EP0004213 A1 EP 0004213A1
Authority
EP
European Patent Office
Prior art keywords
compartment
coil
arc
contact
contacts
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
EP19790400093
Other languages
English (en)
French (fr)
Other versions
EP0004213B2 (de
EP0004213B1 (de
Inventor
Georges Bernard
Jacques Hennebert
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9205284&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0004213(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0004213A1 publication Critical patent/EP0004213A1/de
Application granted granted Critical
Publication of EP0004213B1 publication Critical patent/EP0004213B1/de
Publication of EP0004213B2 publication Critical patent/EP0004213B2/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 device of the kind mentioned (F 2,239,750) comprises nozzles formed in the partition walls of the compartments, and two movable contacts obstruct these communication nozzles in the closed position.
  • the exhaust to the expansion compartments of the gas initially compressed in the first compartment under the influence of the rotating arc takes place only after re line of movable contacts outside the nozzles.
  • This escapement occurs after a predetermined opening stroke of the movable contacts causing the arc pneumatic blowing with a delay, independent of the intensity of the current to be cut.
  • This device has a double rotating arc, the pneumatic blowing of which takes place in the nozzle, this blowing being less effective than a blowing in the region of the arc roots.
  • the invention aims to avoid these drawbacks and to allow the production of a simple and reliable arc extinguishing device with pneumatic and magnetic self-blowing.
  • the arc extinguishing device is characterized in that said fixed and mobile contacts of tubular shape confine exhaust paths for the blowing gases from said first compartment to said second and third compartments, said paths being open. as soon as said contacts are separated, and an annular electrode for switching on said blowing coil is arranged coaxially and close to the fixed contact in the arc formation zone, to capture the root of the arc and put in circuit said coil and to constitute an annular migration path of the arc root.
  • the separation of the contacts causes the opening of the con exhaust pipes and striking an arc which quickly switches to the annular electrode for switching on the magnetic blow-off coil.
  • the arc blown magnetically by the coil sweeps the space of the breaking chamber by heating the volume of gas whose pressure increases.
  • the compressed gas escapes through the tubular contacts by pneumatically blowing the two rotating arc roots on annular tracks.
  • the tests confirmed the d 4 breaking performances such a device.
  • the blow coil is shunted in the closed position of the contacts and therefore it is possible to use a coil capable of generating a strong magnetic blow field.
  • an insulating sheath covers the fixed contact as soon as the contacts are separated to avoid any re-ignition of the arc on this contact.
  • a judiciously arranged ferromagnetic ring increases the action of the magnetic blowing field and the anchoring of the arc root on the annular electrode.
  • Re-striking the arc on the fixed contact is avoided, according to another development of the invention, by placing the fixed contact outside the coil away from ionized gases escaping through the tubular core of the coil.
  • the increase in gas pressure under the action of the arc is a function of the intensity of the arc current and to ensure a breaking capacity of a wide range of currents it is advantageous to provide in a manner known per se exhaust shutter valves, which delay pneumatic blowing until a predetermined pressure threshold is crossed. This improvement proves to be important in a device for generating the pneumatic blowing pressure by the arc itself.
  • a pole of a circuit breaker comprises a sealed enclosure 10 made of insulating material, filled with gas pressure insulator with high dielectric strength, in particular sulfur hexafluoride, and closed by a cover 12 sealed on an annular rim 14 of the enclosure 10.
  • the circuit breaker comprises a pair of fixed and movable hollow contacts 26, 28, in the form of a nozzle, aligned in the direction of the axis XX '.
  • the fixed contact 26 has an inside diameter equal to the outside diameter of the movable contact 28 to allow interlocking in the closed position.
  • a control rod 30 of conductive material is slidably mounted in a support member 32 and connects the sliding movable contact 28 to a crank operating mechanism 3 4.
  • the control rod 30 contact 28 assembly passes through an opening with little play 36 formed in the partition 16, and is provided with an axial conduit 38 which communicates with the compartment 20 by orifices 40.
  • a contact socket 42 sliding on the control rod 30 connects the latter to the support 32 and to a connection terminal 44 external to the enclosure 10.
  • An opposite terminal 48 is connected by a support piece 50 to the fixed contact 26.
  • An axial duct 52 is formed in the support piece assembly 5 0 fixed contact 26, which passes through the partition 18. The duct 52 communicates with the compartment 24 through orifices 5 4.
  • a cylindrical electromagnetic coil 56 is fixed on the face of the partition 18 in the intermediate compartment 22 and surrounds the fixed contact 26 with the interposition of an insulating sheath 58.
  • An annular electrode 60 forming a short-circuit ring is attached to the free face of the coil 56 while being separated from the end of the fixed contact 26 by an axial air gap e l sufficiently small to facilitate the migration of the arc roots of the fixed contact 26 towards the electrode 60 at the start of the contact opening stroke 28.
  • One end of the coil 56 is connected to the electrode 60 and the opposite end is connected to the support piece 50 by a conductive sleeve 62.
  • a metal coating 64 of cylindrical shape is applied to the internal wall of the enclosure 10 along the intermediate compartment 22, and serves to protect said wall against the effects of the arc drawn between the contacts 26, 28 during their separation .
  • a radial air gap 2 isolates the electrode 60 from the movable contact 28 in the closed position.
  • the crank 14 of the operating mechanism pivots in the trigonometric direction and causes the control rod 30 to slide in the direction of the arrow f.
  • An initial arc is first drawn between the contacts 26, 28, as soon as they separate, then during the continued travel of the movable contact 28, a first partial arc is established between the fixed contact 26 and the electrode 60, and a second partial arc in series with the first, is initiated between the electrode 60 and the movable contact 28.
  • the current always flows through the fixed contact 26, and the arc drawn between the latter and the electrode 60 shunts coil 56, which remains de-energized.
  • the first partial arc is extinguished, and the current I is switched in the shunt circuit for supplying the coil 56 via the sleeve 62.
  • the arc anchored on the movable contact 28 and l 'electrode 60 is then subjected to a radial field B generated by the coil 5 6 which causes its rapid rotation on the electrode 6 0 .
  • the heating of the SF 6 gas contained in the intermediate compartment 22 by the rotating arc causes an increase in pressure and an escape of the compressed gas through the conduits 38 , 5 2 (arrows F 1 and F 2 of FIG. 2) towards the expansion compartments 20, 24 arranged on either side of the breaking chamber 22.
  • the double reverse blowing ensures rapid extinction of the rotating arc.
  • the three compartments 20, 22, 24 are in communication.
  • the phase shift between the magnetic field B generated by the coil 56 and the current I improves the blowing.
  • the rotating arc constitutes a means for generating pressure of the gas contained in the intermediate compartment 22 and avoids any excessive heating of the tracks of migration of the roots of the arc.
  • the compression of the SF 6 by the rotating arc and the extinction of the latter by the magnetic blowing and the double pneumatic blowing are carried out in the same intermediate compartment 22 shaped as a breaking chamber.
  • FIGs 3 and 4 show two alternative embodiments in which the same references are used to designate identical or similar parts to those shown in Figures 1 and 2, these parts are no longer described in detail below.
  • the fixed partition 18 is metallic and serves as a support for the hollow fixed contact 26 and for the annular coil 56 assembly, auxiliary electrode 60.
  • Terminal 48 carries a flange 70 inside the enclosure 10, which is connected to the partition 18 by bars 72 of conductive material.
  • One end of the coil 56 is connected to the electrode 60, and the opposite end is connected to the partition 18 by at least one connecting rod 74 passing through an intermediate spacer 76 of conductive material.
  • the intermediate compartment 22 is delimited by the fixed partition 16, the internal face of the enclosure 10 and an auxiliary wall 7 8 extending parallel to the longitudinal axis XX '.
  • the fixed hollow contact 26 opens directly into the compartment 24 for expanding the insulating gas through an orifice 80 and the partition 18 is provided with a plurality of holes 82.
  • the compartments 20, 24 expansion are in communication on the one hand by the axial conduits 38, 84 of the movable and fixed contacts 28 and 26 and on the other hand by the holes 82 of the partition 1 8 and a passage 86 formed between the wall 7 8 and l pregnant 10.
  • circuit breaker according to fig. 3 is identical to that described above, the passage 86 always ensuring equalization of the pressures between the compartments 20, 24 for expansion of the insulating gas.
  • the variant embodiment illustrated in FIG. 4 includes valves 100, 102 for closing the internal conduits formed in the movable and fixed contacts 28 26.
  • Each valve is biased in the closed position by a spring 104, 106 and is exposed to the pressure prevailing in the first compartment 22.
  • the calibration of the valves by the choice of springs 104, 106 ensures simultaneous opening of the valves 100, 102, when a pressure threshold is exceeded in the first compartment 22.
  • the addition of the valves allows in the closed position a better rise in pressure of the gas in the compartment 22 under the influence of the rotating arc, and an efficient blowing of the arc, when the pressure threshold is reached after a period depending on the intensity of the current to be cut.
  • the device modulates the blowing effect of the arc extinguishing gas.
  • FIG. 5 illustrates an embodiment, which excludes any re-ignition of the arc on the fixed contact 26. Inside this contact 26 is mounted with limited sliding a tubular sheath 108 made of an insulating material. The diameter of the sheath 108 corresponds substantially to that of the movable contact 28 and this sheath 108 is pushed back into the closed position of the circuit breaker, against a return spring 110 by the end of the movable contact 28 fitting into the fixed contact 26.
  • the sheath 108 accompanies the movable contact 28 in its movement over a stroke limited by a stop (not shown) to cover the fixed contact 26.
  • a ring 111 made of ferromagnetic material is embedded in the electrode 60 to reinforce the blowing field and the anchoring of the arc root on the electrode 60.
  • This ring 111 can of course be attached to the surface of the electrode or be housed in a groove of the electrode and it can be used in the structures illustrated in FIGS. 1 to 4 or 6.
  • a fixed contact 112 externally surrounds the coil 56 and has a collar 114 covering the outer edge of the free face of the coil 56
  • An annular electrode 116 fixed on the internal rim of the free face of the coil 56, has a cylindrical tail 118, which penetrates inside the coil 56 by forming the gas exhaust duct towards the compartment. expansion.
  • the electrode 116 is electrically isolated from the fixed contact 112 by a slight gap 120 and the coil 56 is electrically connected between the fixed contact 112 and the electrode 116.
  • the movable contact 28 comes in the iron position abutting the collar 114.
  • a fixed arcing contact 122 associated with the movable contact 28 is disposed inside this contact opposite the annular electrode 116 while being spaced from the latter.
  • An arc A is drawn between the contacts 112, 28 when the contacts are separated. From a certain length the arc roots migrate towards the electrode 116 and the arcing contact 122, establishing two arcs B in series, respectively between the arcing contact 122 and the electrode 116 and between the electrode 116 and the collar 14, the latter arc rapidly extinguishing by switching on the coil 56 in the aforementioned manner.
  • the arc subjected to the effect of the magnetic field rotates and the roots can move on the arcing contact 122 and the tail 118 without any risk of de-excitation of the coil 56.
  • a ferromagnetic core 124 is housed coaxially inside the coil 56 to reinforce the blowing action of the latter.
  • the core 124 only partially obstructs the gas exhaust duct, leaving an annular exhaust duct between the tail 118 and the core 124 and / or having a central hole 126.
  • Such a core 124 can advantageously be provided. in the other embodiments described above.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP19790400093 1978-03-01 1979-02-14 Lichtbogenlöscheinrichtung mit pneumatischer und magnetischer Blasung Expired EP0004213B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7806078 1978-03-01
FR7806078A FR2418963A1 (fr) 1978-03-01 1978-03-01 Dispositif d'extinction d'arc a autosoufflage et a arc tournant

Publications (3)

Publication Number Publication Date
EP0004213A1 true EP0004213A1 (de) 1979-09-19
EP0004213B1 EP0004213B1 (de) 1982-02-10
EP0004213B2 EP0004213B2 (de) 1988-11-09

Family

ID=9205284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790400093 Expired EP0004213B2 (de) 1978-03-01 1979-02-14 Lichtbogenlöscheinrichtung mit pneumatischer und magnetischer Blasung

Country Status (3)

Country Link
EP (1) EP0004213B2 (de)
DE (1) DE2962075D1 (de)
FR (1) FR2418963A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039523A1 (de) * 1980-05-07 1981-11-11 BBC Aktiengesellschaft Brown, Boveri & Cie. Hochspannungsleistungsschalter
EP0042456A1 (de) * 1980-06-23 1981-12-30 BBC Aktiengesellschaft Brown, Boveri & Cie. Hochspannungsleistungsschalter
FR2487113A1 (fr) * 1980-07-17 1982-01-22 Merlin Gerin Interrupteur a arc tournant double
FR2565731A1 (fr) * 1984-06-08 1985-12-13 Interaction Perfectionnements aux disjoncteurs
FR2596578A1 (fr) * 1986-03-28 1987-10-02 Merlin Gerin Disjoncteur electrique a autoexpansion et a arc tournant
EP1225610A1 (de) * 2001-01-23 2002-07-24 ABB Schweiz AG Abbrandschaltanordnung für einen Leistungsschalter
FR3008540A1 (fr) * 2013-07-12 2015-01-16 Alstom Technology Ltd Disjoncteurs haute tension, en particulier a arc tournant

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675996C (de) * 1931-05-13 1939-05-23 Erwin Marx Dr Ing Einrichtung zur Lichtbogenloeschung und Vermeidung von Rueckzuendungen bei Lichtbogenstromrichtern
US2333598A (en) * 1941-01-09 1943-11-02 Westinghouse Electric & Mfg Co Circuit interrupter
DE743898C (de) * 1940-04-19 1944-10-25 Voigt & Haeffner Ag Druckgasschalter
CH250184A (de) * 1943-03-06 1947-08-15 Lange Emil Schalter mit Löschung des Lichtbogens durch einen vom Lichtbogen selbst erzeugten Drucklöschmittelstrom.
FR1441241A (fr) * 1965-04-28 1966-06-03 Nv Disjoncteur à gaz comprimé
FR2239750A1 (en) * 1973-08-04 1975-02-28 Bbc Brown Boveri & Cie Switch with enclosed blast chamber - divided chamber with nozzle in partition wall actuates blast by heat or arc
DE2350832A1 (de) * 1973-10-10 1975-04-24 Calor Emag Elektrizitaets Ag Hochspannungsschalter
FR2274131A1 (fr) * 1973-03-30 1976-01-02 Siemens Ag Procede et dispositif pour eteindre un arc electrique dans un interrupteur a courant alternatif
FR2282711A1 (fr) * 1974-08-20 1976-03-19 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675996C (de) * 1931-05-13 1939-05-23 Erwin Marx Dr Ing Einrichtung zur Lichtbogenloeschung und Vermeidung von Rueckzuendungen bei Lichtbogenstromrichtern
DE743898C (de) * 1940-04-19 1944-10-25 Voigt & Haeffner Ag Druckgasschalter
US2333598A (en) * 1941-01-09 1943-11-02 Westinghouse Electric & Mfg Co Circuit interrupter
CH250184A (de) * 1943-03-06 1947-08-15 Lange Emil Schalter mit Löschung des Lichtbogens durch einen vom Lichtbogen selbst erzeugten Drucklöschmittelstrom.
FR1441241A (fr) * 1965-04-28 1966-06-03 Nv Disjoncteur à gaz comprimé
FR2274131A1 (fr) * 1973-03-30 1976-01-02 Siemens Ag Procede et dispositif pour eteindre un arc electrique dans un interrupteur a courant alternatif
FR2239750A1 (en) * 1973-08-04 1975-02-28 Bbc Brown Boveri & Cie Switch with enclosed blast chamber - divided chamber with nozzle in partition wall actuates blast by heat or arc
DE2350832A1 (de) * 1973-10-10 1975-04-24 Calor Emag Elektrizitaets Ag Hochspannungsschalter
FR2282711A1 (fr) * 1974-08-20 1976-03-19 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039523A1 (de) * 1980-05-07 1981-11-11 BBC Aktiengesellschaft Brown, Boveri & Cie. Hochspannungsleistungsschalter
EP0042456A1 (de) * 1980-06-23 1981-12-30 BBC Aktiengesellschaft Brown, Boveri & Cie. Hochspannungsleistungsschalter
FR2487113A1 (fr) * 1980-07-17 1982-01-22 Merlin Gerin Interrupteur a arc tournant double
EP0045229A1 (de) * 1980-07-17 1982-02-03 Merlin Gerin Schalter mit doppelt rotierendem Lichtbogen
FR2565731A1 (fr) * 1984-06-08 1985-12-13 Interaction Perfectionnements aux disjoncteurs
WO1986000169A1 (fr) * 1984-06-08 1986-01-03 Merlin Gerin Dispositif d'extinction d'arc pour appareillage electrique a isolement gazeux
US4697055A (en) * 1984-06-08 1987-09-29 Merlin Gerin Arc extinction device for gas insulation electrical switchgear
FR2596578A1 (fr) * 1986-03-28 1987-10-02 Merlin Gerin Disjoncteur electrique a autoexpansion et a arc tournant
EP0240397A1 (de) * 1986-03-28 1987-10-07 Merlin Gerin Selbstbeblasender elektrischer Lastschalter mit rotierendem Lichtbogen
US4737607A (en) * 1986-03-28 1988-04-12 Merlin Gerin Electrical circuit breaker with self-expansion and rotating arc
EP1225610A1 (de) * 2001-01-23 2002-07-24 ABB Schweiz AG Abbrandschaltanordnung für einen Leistungsschalter
FR3008540A1 (fr) * 2013-07-12 2015-01-16 Alstom Technology Ltd Disjoncteurs haute tension, en particulier a arc tournant

Also Published As

Publication number Publication date
FR2418963A1 (fr) 1979-09-28
FR2418963B1 (de) 1980-08-22
EP0004213B2 (de) 1988-11-09
DE2962075D1 (en) 1982-03-18
EP0004213B1 (de) 1982-02-10

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