EP0302390A1 - Druckgasschalter für Hoch- oder Mittelspannung mit von der Lichtbogenenergie entnommener Ausschaltenergie - Google Patents

Druckgasschalter für Hoch- oder Mittelspannung mit von der Lichtbogenenergie entnommener Ausschaltenergie Download PDF

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Publication number
EP0302390A1
EP0302390A1 EP88112228A EP88112228A EP0302390A1 EP 0302390 A1 EP0302390 A1 EP 0302390A1 EP 88112228 A EP88112228 A EP 88112228A EP 88112228 A EP88112228 A EP 88112228A EP 0302390 A1 EP0302390 A1 EP 0302390A1
Authority
EP
European Patent Office
Prior art keywords
contacts
circuit breaker
arc
auxiliary
piston
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
EP88112228A
Other languages
English (en)
French (fr)
Other versions
EP0302390B1 (de
Inventor
Edmond Thuries
Denis Dufournet
Michel Perret
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 AT88112228T priority Critical patent/ATE77512T1/de
Publication of EP0302390A1 publication Critical patent/EP0302390A1/de
Application granted granted Critical
Publication of EP0302390B1 publication Critical patent/EP0302390B1/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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7007—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein the flow is a function of the current being interrupted
    • 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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • H01H33/903—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc and assisting the operating mechanism

Definitions

  • the present invention relates to a high or medium voltage circuit breaker with pressurized dielectric gas, the breaking energy of which is, for the breaking of high currents, partially drawn from that of the arc.
  • Circuit breakers comprising a arc blowing piston, the operating energy of which is provided at least partially by the gas, the pressure of which increases under the effect of the temperature increase produced by the arc.
  • circuit breaker is for example described in American patent 3,985,988.
  • An object of the invention is to provide a circuit breaker with arc blowing by piston, in which a second arc, increasing the force exerted on the piston, is only established when the current to be cut is large (short current -circuit for example) this auxiliary arc is not established when the current to be cut is low (inductive current, no-load breaking).
  • the subject of the invention is a high or medium voltage gas circuit breaker under pressure with breaking energy taken from that of the arc, of the type comprising: - a fixed assembly comprising main contacts and contacts bow, - a mobile assembly comprising main contacts and arcing contacts, a blowing volume comprising a piston moving at the separation of the contacts and pushing compressed gas through a blowing nozzle opening onto the zone where a main arc is formed at the separation of the arcing contacts, and - a set of auxiliary contacts in series with the arcing contacts to create an auxiliary arc in the volume located at the rear of the piston, characterized in that it comprises means for authorizing the separation of the auxiliary contacts only when the pressure in the blowing zone reaches a predetermined threshold.
  • the circuit breaker of Figure 1 comprises an outer casing 1, made of ceramic delimiting a volume 2 filled with a dielectric gas such as sulfur hexafluoride, under a pressure of a few bars.
  • a dielectric gas such as sulfur hexafluoride
  • a metal part comprising a first cylindrical portion 5a coaxial with the envelope, a disc part 5b perpendicular to the axis 6 of the envelope and a second cylindrical part 5c of diameter less than the diameter of the part 5a.
  • the disc part comprises preferably circular orifices 5d, regularly distributed towards the edge of the disc, for example three orifices at 120 degrees from one another.
  • the cylindrical part 5c has a thicker end 5e pierced with orifices 5f converging towards the axis 6.
  • the part 8 carries orifices 8b coincident with the orifices 5f to define blowing passages.
  • the orifices 5d pass rods 9 fixed by a first end to a ring 10 sliding in the cylinder 5a and pushed by a spring 11 bearing on the flange.
  • the second end of the rods 9 carries a piston 12 which is extended on the one hand by a metal cylinder 13 surrounding the cylinder 5a, on the other hand by an insulating cylinder 14 terminated by a bulged part 14a.
  • Parts 12, 14, 5c and 8 define a volume V1.
  • the cylinder 5a is extended by a metal part 15 provided with an annular portion 16 constituting a fixed piston sliding along the cylinder 13.
  • the volume delimited by the parts 16, 13, 12, 5c and 5b is designated by V2.
  • the pistons 12 and 16 are pierced with orifices referenced respectively 12a and 16a associated with movable valves 12b and 16b.
  • a metal tube 18 terminated by an annular shoulder 18a.
  • a cylindrical assembly comprising a first metal cylinder 19 extended by a second insulating cylinder 20 itself extended by a third metal cylinder 21, terminated by an end 21a of metal or alloy resistant to arc wear and constituting one of the main arcing contacts.
  • the cylinder 21 extends from the side opposite the end 21a by a cylindrical part external to the cylinder 20 and terminated by a portion 21c constituting one of the auxiliary arcing contacts.
  • the other auxiliary arcing contact is a metal part 22 pushed by a spring 23 bearing on the shoulder 18a, provided with a resistant end 22a.
  • the cylinder 5c has, at the right of the auxiliary arcing contacts, large openings 18b.
  • An insulating cylinder 24 is fixed to the contact 23. This cylinder has openings 24a putting the contact area 21c, 22a in connection with the volume V2 through the openings 18b.
  • the cylinder 24 has an annular part 24b provided with a sliding contact closing the volume V2 by sliding on the cylinder 22.
  • the end of the cylinder 24 has a bulged portion 24c closing the annular space between the cylinders 21 and 5c and constituting a piston.
  • the section S2 of this space is greater than the section S1 between the part 21 and the end of the part 5e.
  • the mobile assembly of the circuit breaker comprises a tube 25 with end 25a resistant to the arc and constituting the movable main arc contact, as well as fingers 26 associated with springs 27 and protected by a cover 28 and constituting the fixed main contact. .
  • the movable contacts 25 and 26 are connected as is well known to a second outlet not shown.
  • the cover 28 pushes the part 14, which causes the compression of the spring 11.
  • the main contacts 26 and 8a ensure the passage of the permanent current through the socket 4, the flange 3, the cylindrical part 5a, 5b, 5c, 5e, contact 8a and contact 26.
  • the main arcing contacts 25a-21a and the auxiliary arcing contacts 22a-21c are in contact, the spring 23 can be slack or bandaged.
  • the circuit breaker works as follows:
  • the moving part is moved by the operating rod down the figure.
  • the movement causes the separation of the auxiliary arcing contacts 22a and 21c, causing the creation of a secondary arcing; the current then flows through parts 4, 3, 5a, 5d, 18, 18a, 19, 22, arc 31, 21c, 21, 21a, arc 30, 25a and 25.
  • the arc 31 causes a strong rise in the pressure in the volume V2, which increases the pressure on the piston 12 which, acting on the large surface S4 thus contributes to increasing the blowing of the primary arc 30 by the gas of volume V1.
  • valve 12b remains closed, since it has a larger surface on the side of the volume V1 than on the side of the volume V2.
  • the valve 16b opens and prevents a depression of the volume V2 when the secondary arc appears, the removal closes it.
  • the arc 30 has insufficient energy for the increase in pressure it generates to be sufficient to move the part 24 against the action of the spring.
  • the energy contained in the spring 11 is sufficient to ensure, by its action on the piston 12, a correct blowing of the arc 30.
  • Decompression holes 21b in the part 21 and 18b in the part 18 make it possible to equalize the pressures and reduce the energy required to close the circuit breaker.
  • the current threshold to be cut from which the secondary arc is established is adjusted by the force of the spring 23.
  • blowing piston and the auxiliary arcing contacts belong to the fixed parts of the circuit breaker.
  • FIG. 3 represents a circuit breaker in which the blowing piston and the auxiliary arcing contacts belong to the mobile assembly.
  • FIGS. 1 and 3 The elements functionally common in FIGS. 1 and 3 have been given the same reference numbers.
  • the spring 11 now rests in a groove 5g of the part 5a-5b-5c which is guided in a fixed tube 33.
  • the blowing piston 12 is not coupled to the movable contact.
  • the mass of the moving part being greater than that of the moving part of the circuit breaker according to FIG. 1, the solution of FIG. 1 will often be preferred to that of FIG. 3.
  • pre-striking may occur for high nominal voltages during the closing (closing) phase of the circuit breaker.
  • Pre-ignition causes the opening of the secondary arcing contacts, causing an arcing which increases the pressure in the volume V2. It is therefore necessary to provide a means of evacuating the gas from this volume to volume 2, failing which the closing of the circuit breaker could not take place.
  • FIG 4 is a partial view of the circuit breaker of the invention, in which the elements common to Figures 1 and 4 have been given the same reference numbers.
  • the circuit breaker has the following characteristics: the cylinder 14 is made movable relative to the cylinder 13 by means of a spring 40 which is supported on a step 13a of the part 13.
  • the cylinder 13 is pierced with radial holes 13b; it is the same for the part 14, which has radial orifices 14b, situated so that, by the relative sliding of the parts 13 and 14, the orifices 13b can come into coincidence with the orifices 14b.
  • the holes 13b and 14b are also located relative to each other so that when the circuit breaker is open or being opened ( Figure 4), these holes are not in coincidence, which leaves the volume V2 closed.
  • the stroke of the part 14 can be limited by a pin 13c secured to the cylinder 13 cooperating with a light 14c of the part 14.
  • Figure 6 and a partial view in axial half-section of a circuit breaker according to an alternative embodiment.
  • auxiliary contact 22 and the part 24 are fixed and integral with the part 5a.
  • the second auxiliary contact, now referenced 45 slides in a housing 24c of the part 24, under the action of a piston 46, one face 46a of which is placed in communication with the zone of the main arc by grooves.
  • a spring 47 allows the contact 45 to be recalled.
  • the latter is provided with sliding contacts 45a ensuring the passage of current between the contact 45 and the main arcing contact.

Landscapes

  • Circuit Breakers (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
EP88112228A 1987-08-03 1988-07-28 Druckgasschalter für Hoch- oder Mittelspannung mit von der Lichtbogenenergie entnommener Ausschaltenergie Expired - Lifetime EP0302390B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88112228T ATE77512T1 (de) 1987-08-03 1988-07-28 Druckgasschalter fuer hoch- oder mittelspannung mit von der lichtbogenenergie entnommener ausschaltenergie.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8710988A FR2619246B1 (fr) 1987-08-03 1987-08-03 Disjoncteur a haute ou moyenne tension a gaz sous pression a energie de coupure prelevee sur celle de l'arc
FR8710988 1987-08-03

Publications (2)

Publication Number Publication Date
EP0302390A1 true EP0302390A1 (de) 1989-02-08
EP0302390B1 EP0302390B1 (de) 1992-06-17

Family

ID=9353822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112228A Expired - Lifetime EP0302390B1 (de) 1987-08-03 1988-07-28 Druckgasschalter für Hoch- oder Mittelspannung mit von der Lichtbogenenergie entnommener Ausschaltenergie

Country Status (10)

Country Link
US (1) US4880946A (de)
EP (1) EP0302390B1 (de)
JP (1) JPH061656B2 (de)
CN (1) CN1014193B (de)
AT (1) ATE77512T1 (de)
BR (1) BR8803823A (de)
CA (1) CA1295003C (de)
DE (1) DE3872090T2 (de)
ES (1) ES2032908T3 (de)
FR (1) FR2619246B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406794A1 (de) * 1989-07-04 1991-01-09 Gec Alsthom Sa Hoch- oder Mittelspannungslastschalter
FR2661550A1 (fr) * 1990-04-26 1991-10-31 Alsthom Gec Disjoncteur a haute tension a arc serie.
FR2679696A1 (fr) * 1991-07-24 1993-01-29 Alsthom Gec Disjoncteur a haute et moyenne tension a gaz de soufflage.
EP0554686A1 (de) * 1992-02-06 1993-08-11 GEC Alsthom T&D AG Druckgasschalter
FR2691575A1 (fr) * 1992-05-25 1993-11-26 Alsthom Gec Disjoncteur à haute tension à non passages par zéro du courant.

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629260B1 (fr) * 1988-03-23 1994-07-08 Alsthom Disjoncteur a haute tension a faible energie de manoeuvre
FR2639147B1 (fr) * 1988-09-16 1990-12-14 Alsthom Gec Disjoncteur a haute tension a gaz dielectrique utilise pour le soufflage
FR2647255B1 (fr) * 1989-05-17 1993-04-23 Alsthom Gec Disjoncteur a haute tension a gaz dielectrique de soufflage
FR2647949B1 (fr) * 1989-05-31 1994-02-18 Gec Alsthom Sa Disjoncteur a haute tension a gaz dielectrique de soufflage
FR2668648B1 (fr) * 1990-10-24 1992-12-24 Alsthom Gec Disjoncteur a sf6 a condensateur incorpore.
EP0508160B1 (de) * 1991-04-12 1994-12-14 GEC Alsthom T&D AG Druckgasschalter
CN110914947B (zh) * 2017-07-31 2021-12-28 通用电器技术有限公司 设置有吹弧单元的电气开关
CN112968653A (zh) 2021-01-29 2021-06-15 中国第一汽车股份有限公司 一种电驱系统及车辆

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029449B (de) * 1957-01-17 1958-05-08 Licentia Gmbh Hochspannungsschalter mit zwei innerhalb einer Loeschkammer hintereinander-geschalteten Kontaktstellen
DE2349263A1 (de) * 1973-10-01 1975-04-03 Bbc Brown Boveri & Cie Elektrischer schalter
FR2356258A1 (fr) * 1976-06-24 1978-01-20 Sprecher & Schuh Ag Disjoncteur a gaz comprime

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593636B1 (fr) * 1986-01-29 1988-03-18 Cegelec Disjoncteur a hexafluorure de soufre fonctionnant dans un environnement a tres basse temperature

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029449B (de) * 1957-01-17 1958-05-08 Licentia Gmbh Hochspannungsschalter mit zwei innerhalb einer Loeschkammer hintereinander-geschalteten Kontaktstellen
DE2349263A1 (de) * 1973-10-01 1975-04-03 Bbc Brown Boveri & Cie Elektrischer schalter
FR2356258A1 (fr) * 1976-06-24 1978-01-20 Sprecher & Schuh Ag Disjoncteur a gaz comprime

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406794A1 (de) * 1989-07-04 1991-01-09 Gec Alsthom Sa Hoch- oder Mittelspannungslastschalter
FR2649531A1 (fr) * 1989-07-04 1991-01-11 Alsthom Gec Disjoncteur a haute ou moyenne tension
US4996399A (en) * 1989-07-04 1991-02-26 Gec Alsthom Sa High or medium tension circuit breaker
FR2661550A1 (fr) * 1990-04-26 1991-10-31 Alsthom Gec Disjoncteur a haute tension a arc serie.
EP0456025A1 (de) * 1990-04-26 1991-11-13 Gec Alsthom Sa Hochspannungsschalter mit Hilfslichtbogen in Reihe
US5160818A (en) * 1990-04-26 1992-11-03 Gec Alsthom Sa Series-arc high tension circuit-breaker
FR2679696A1 (fr) * 1991-07-24 1993-01-29 Alsthom Gec Disjoncteur a haute et moyenne tension a gaz de soufflage.
EP0526296A1 (de) * 1991-07-24 1993-02-03 Gec Alsthom Sa Druckgasschalter für Hoch- und Mittelspannung
US5258589A (en) * 1991-07-24 1993-11-02 Gec Alsthom Sa High- and medium-voltage circuit breaker with lower operating energy
EP0554686A1 (de) * 1992-02-06 1993-08-11 GEC Alsthom T&D AG Druckgasschalter
FR2691575A1 (fr) * 1992-05-25 1993-11-26 Alsthom Gec Disjoncteur à haute tension à non passages par zéro du courant.

Also Published As

Publication number Publication date
ES2032908T3 (es) 1993-03-01
BR8803823A (pt) 1989-02-21
JPH061656B2 (ja) 1994-01-05
US4880946A (en) 1989-11-14
FR2619246B1 (fr) 1989-11-17
ATE77512T1 (de) 1992-07-15
CN1031153A (zh) 1989-02-15
CN1014193B (zh) 1991-10-02
DE3872090D1 (de) 1992-07-23
CA1295003C (fr) 1992-01-28
EP0302390B1 (de) 1992-06-17
FR2619246A1 (fr) 1989-02-10
DE3872090T2 (de) 1992-12-03
JPS6459732A (en) 1989-03-07

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