EP0701264A1 - Selbstbeblasener lastschalter mit halbbeweglichem Kolben - Google Patents

Selbstbeblasener lastschalter mit halbbeweglichem Kolben Download PDF

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Publication number
EP0701264A1
EP0701264A1 EP95401992A EP95401992A EP0701264A1 EP 0701264 A1 EP0701264 A1 EP 0701264A1 EP 95401992 A EP95401992 A EP 95401992A EP 95401992 A EP95401992 A EP 95401992A EP 0701264 A1 EP0701264 A1 EP 0701264A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
pressure wall
cylinder
pressure
tube
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
EP95401992A
Other languages
English (en)
French (fr)
Other versions
EP0701264B1 (de
Inventor
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.)
Grid Solutions SAS
Original Assignee
GEC Alsthom T&D 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 T&D SA filed Critical GEC Alsthom T&D SA
Publication of EP0701264A1 publication Critical patent/EP0701264A1/de
Application granted granted Critical
Publication of EP0701264B1 publication Critical patent/EP0701264B1/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
    • H01H33/88—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
    • H01H33/905—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 the compression volume being formed by a movable cylinder and a semi-mobile piston

Definitions

  • the present invention relates to a semi-movable piston self-blowing circuit breaker.
  • a circuit breaker of the self-blowing type comprising a casing filled with a dielectric gas under pressure, two arcing contacts cooperating with each other, at least one forming part of a movable contact assembly integral with an operating member and adapted to be moved axially in the envelope between a closed position and an open position, the movable contact assembly consisting of a first tube and a second tube coaxial with the first tube to delimit, on either side of a first ring connecting the first and second tubes, a blowing chamber and a compression chamber communicating with the blowing chamber and closed by a pressure wall of a semi-mobile piston urged by a spring resting on a fixed flange.
  • the gas in the compression chamber is compressed because the distance between the piston and the ring separating the compression chamber from the blowing chamber decreases. During this movement, it is the spring which keeps the semi-mobile piston in a fixed position against the pressure of the gas against its pressure wall in the compression chamber. It is therefore necessary to provide a sufficient force spring. This force is transmitted in the kinematics of the device and is generally collected by the operating member, generally a connecting rod, and by levers cooperating with the latter. An opening operation therefore requires a certain energy consumption.
  • the object of the invention is to reduce the energy consumption of the circuit breaker during an opening operation.
  • the piston consists of two parts, a first part comprising a first pressure wall and a second part comprising a second pressure wall, with a front surface smaller than that of the first pressure wall, these two adjacent walls forming the pressure wall of the piston and the first part being supported in the same direction as the direction of opening against the second part along an inclined surface, in the closed position of the circuit breaker.
  • said first part consists of a cylinder sliding on the first tube and provided at its end opposite the contacts with an annular flange intended to come into abutment against said fixed flange in the closed position of the circuit breaker, said annular pressure wall integral with said cylinder at its other end and with a cylindrical part coaxial with said cylinder, integral with said pressure wall by one of its ends and having a surface inclined at its other end.
  • said second part consists of a section of cylinder coaxial with said cylinder and provided at its end opposite the contacts with an inclined surface complementary to the inclined surface of the first part and of said second pressure wall integral with the other. end of said cylinder section.
  • said cylinder section consists of a tulip of fingers and the second pressure wall projects in the compression chamber relative to the first pressure wall, in the closed position of the circuit breaker.
  • said second part is urged by a spring bearing by its end opposite the contacts on said fixed flange and, preferably, said first part is also urged by a spring bearing by its end opposite the contacts on said fixed flange.
  • Figure 1 is a longitudinal sectional view of a circuit breaker according to the invention in the closed position.
  • Figure 2 is a longitudinal sectional view of a circuit breaker according to the invention during opening.
  • Figure 3 is a longitudinal sectional view of a circuit breaker according to the invention in the open position.
  • a breaking chamber will be described, it being understood that a high voltage circuit breaker, may comprise, for each phase, several breaking chambers of the type which will be described.
  • FIGS. 1 to 3 the same references designate identical elements.
  • the reference 1 designates a preferably insulating envelope, for example of porcelain, filled with a gas with good dielectric properties, for example sulfur hexafluoride under a pressure of a few bars.
  • the circuit breaker includes a fixed assembly and a movable contact assembly.
  • the fixed assembly comprises an arcing contact 3, consisting of a metal tube, the end 3A of which is made of a material resistant to the effects of the arcing, for example an alloy based on tungsten.
  • the fixed assembly also includes a fixed permanent contact 4 consisting of fingers. The arcing contact and the fixed permanent contact are electrically connected to a first socket, not shown.
  • the movable contact assembly comprises an operating part 6 passing through the chamber in a sealed manner and connected to a mechanism not shown.
  • a metal assembly comprising two coaxial tubes 7 and 8, the tube 8 having a diameter larger than the tube 7.
  • the two tubes 7, 8 are connected together by a metal ring 9. These tubes and this crown are preferably made in one piece from machining.
  • the tube 7 constitutes the movable arcing contact. Its end 7A is made of a material resistant to the effects of the arc and cooperates with the contact 3, 3A.
  • the tube 8 has one end 8A carrying a blowing nozzle 10 made of insulating material.
  • the tubular portion 8A constitutes the permanent movable contact of the circuit breaker and cooperates, when the circuit breaker is in the engaged position (closed position) with the fingers 4 as shown in FIG. 1.
  • the end 8A of the tube 8, the blowing nozzle 10, the tube 7 and the crown 9 define a blowing chamber 17.
  • the crown 9, the tubes 7 and 8 and a piston 11 define a compression chamber 18 separated from the blowing chamber 17 by the crown 9.
  • the piston slides axially between the tubes 7 and 8 in a sealed manner.
  • the tube 8 slides on a fixed cylinder 10 having an inner annular flange 10A.
  • the piston 11 consists of two parts 12, 13, a first part 12 comprising a large pressure wall 12A, called the first pressure wall, and a second part 13 comprising a small pressure wall 13A, called the second pressure wall, these two adjacent walls forming the pressure wall of the piston 11.
  • These two parts 12, 13 are in mutual contact against one another along an inclined surface, in the closed position of the circuit breaker, the first part 12 being pressing against the second part 13 in the same direction as the opening direction.
  • the first part 12 consists of a cylinder 12B sliding on the first tube 7 and provided at its end opposite the contacts with an annular flange 12C intended to abut against the fixed flange 10A in the closed position of the circuit breaker, of said wall 12A annular pressure integral with said cylinder 12B at its other end and a cylindrical portion 12D coaxial with the cylinder 12B, integral with the pressure wall 12A by one of its ends and having an inclined surface 12E at its other end.
  • This first part 12 is biased by a spring 15 in support at its opposite end to the contacts on the fixed flange 10A and slides on the tube 7.
  • the second part 13 consists of a cylinder section 13B coaxial with said cylinder and provided at its end opposite the contacts with an inclined surface 13C complementary to the inclined surface 12E of the first part 12 and said second pressure wall 12A integral from the other end of the cylinder section 13B.
  • the cylinder section 13B preferably consists of a tulip of arms. This second part 13 is biased by a spring 14 bearing at its end opposite the contacts on the fixed flange 10A and slides on the tube 8 and on the cylinder 10.
  • the angle of inclination relative to the horizontal of the inclined surfaces is less than 30 °.
  • the pressure force R exerted by the compressed gas in the compression chamber 18 on the pressure wall 12A of the first part 12 of the piston 11 decomposes on the inclined surface 13C into a reduced horizontal component F collected by the springs 14 and 15.
  • the pressure wall 13A of the second part 13 being small, the pressure force exerted by the compressed gas in the compression chamber 18 on this pressure wall 13A is reduced and is collected by the spring 14.
  • the two springs 14 and 15 can therefore be weak positioning springs, of much less force than the springs of the prior art semi-movable piston in one piece.
  • the vertical component N on the surface 13C is on the other hand significant and tends to press the fingers of the cylindrical section 13B against the fixed cylinder 10 and therefore to lock the second part 13 in a fixed position, which immobilizes the piston 11.
  • the pressure wall 13A is also projecting into the compression chamber 18 by compared to the pressure wall 12A. When the crown 9 reaches the wall 13A, as shown in FIG. 2, it pushes this wall 13A which separates the inclined surfaces 12E and 13C and cancels the vertical component N and the piston 11 as a whole is easily driven in the end of the opening displacement.
  • the gas is not compressed in the compression chamber 18 during the entire movement of the movable contact assembly. From the moment when the piston moves with the movable contact assembly, its pressure wall abutting against the crown 9, the amount of energy required to operate the movable contact assembly is very reduced because that there is no more gas compression.

Landscapes

  • Circuit Breakers (AREA)
  • Switches With Compound Operations (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Reciprocating Pumps (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP95401992A 1994-09-06 1995-09-01 Selbstbeblasener Lastschalter mit halbbeweglichem Kolben Expired - Lifetime EP0701264B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9410659A FR2724259B1 (fr) 1994-09-06 1994-09-06 Disjoncteur a auto-soufflage a piston semi-mobile
FR9410659 1994-09-06

Publications (2)

Publication Number Publication Date
EP0701264A1 true EP0701264A1 (de) 1996-03-13
EP0701264B1 EP0701264B1 (de) 1999-10-20

Family

ID=9466725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401992A Expired - Lifetime EP0701264B1 (de) 1994-09-06 1995-09-01 Selbstbeblasener Lastschalter mit halbbeweglichem Kolben

Country Status (5)

Country Link
EP (1) EP0701264B1 (de)
AT (1) ATE185924T1 (de)
DE (1) DE69512858T2 (de)
ES (1) ES2138168T3 (de)
FR (1) FR2724259B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756413A1 (fr) * 1996-11-28 1998-05-29 Gec Alsthom T & D Sa Disjoncteur a piston semi-mobile
CN111630622A (zh) * 2017-12-22 2020-09-04 Abb电网瑞士股份公司 气体绝缘高压或中压断路器
US11373824B2 (en) 2017-12-22 2022-06-28 Hitachi Energy Switzerland Ag Gas-insulated high or medium voltage circuit breaker

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829641A (en) * 1970-03-19 1974-08-13 Siemens Ag Puffer-type electric switch
EP0591039A1 (de) * 1992-09-29 1994-04-06 Gec Alsthom T Et D Sa Hochspannung selbst-Blaslastscharter mit Schnittkammer mit reduzierter Gaskompression

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829641A (en) * 1970-03-19 1974-08-13 Siemens Ag Puffer-type electric switch
EP0591039A1 (de) * 1992-09-29 1994-04-06 Gec Alsthom T Et D Sa Hochspannung selbst-Blaslastscharter mit Schnittkammer mit reduzierter Gaskompression

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756413A1 (fr) * 1996-11-28 1998-05-29 Gec Alsthom T & D Sa Disjoncteur a piston semi-mobile
EP0845796A1 (de) * 1996-11-28 1998-06-03 Gec Alsthom T & D Sa Leistungsschalter mit halbbeweglischem Kolben
US5859399A (en) * 1996-11-28 1999-01-12 Gec Alsthom T & D Sa Circuit breaker having semi-moving piston
CN111630622A (zh) * 2017-12-22 2020-09-04 Abb电网瑞士股份公司 气体绝缘高压或中压断路器
CN111630622B (zh) * 2017-12-22 2022-06-14 日立能源瑞士股份公司 气体绝缘高压或中压断路器
US11373824B2 (en) 2017-12-22 2022-06-28 Hitachi Energy Switzerland Ag Gas-insulated high or medium voltage circuit breaker

Also Published As

Publication number Publication date
ATE185924T1 (de) 1999-11-15
FR2724259B1 (fr) 1996-11-22
ES2138168T3 (es) 2000-01-01
DE69512858T2 (de) 2000-05-04
EP0701264B1 (de) 1999-10-20
DE69512858D1 (de) 1999-11-25
FR2724259A1 (fr) 1996-03-08

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