EP0516640B1 - Disjoncteur hyper-rapide - Google Patents

Disjoncteur hyper-rapide Download PDF

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Publication number
EP0516640B1
EP0516640B1 EP91903322A EP91903322A EP0516640B1 EP 0516640 B1 EP0516640 B1 EP 0516640B1 EP 91903322 A EP91903322 A EP 91903322A EP 91903322 A EP91903322 A EP 91903322A EP 0516640 B1 EP0516640 B1 EP 0516640B1
Authority
EP
European Patent Office
Prior art keywords
repulsion
circuit breaker
plunger rod
hyper
reservoir
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
EP91903322A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0516640A1 (fr
Inventor
Roland Blochouse
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 Belgium SA
Original Assignee
ACEC Transport 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 ACEC Transport SA filed Critical ACEC Transport SA
Priority to AT91903322T priority Critical patent/ATE95944T1/de
Publication of EP0516640A1 publication Critical patent/EP0516640A1/fr
Application granted granted Critical
Publication of EP0516640B1 publication Critical patent/EP0516640B1/fr
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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H01H3/605—Mechanical arrangements for preventing or damping vibration or shock making use of a fluid damper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/222—Power arrangements internal to the switch for operating the driving mechanism using electrodynamic repulsion

Definitions

  • This invention relates to a hyper-fast current limiting circuit breaker usable at medium voltage and more particularly suitable for electric traction, in rolling stock or fixed equipment. It relates more particularly to the mechanical part of a hyper-fast circuit breaker which is equipped with an electronic control circuit.
  • Document EP-A-0 348 584 proposes a hyper-fast circuit breaker assisted by a semiconductor control circuit, comprising a repulsion coil, a repulsion disc associated with a contact bridge carrying the movable contacts, said disc repulsion collaborating with said repulsion coil, and a means for maintaining the contacts in the closed state, hyper-fast circuit breaker in which the holding means consists of a holding spring acting on the repulsion disc associated with the contact bridge via a retaining means acting on a shank integral with said repulsion disc, retaining means which exerts sufficient pressure to resist an imposed contact pressure and which is retractably arranged during the repulsion of the disc under the effect of the reel of repulsion.
  • the damping or braking means is not described there in detail but, in the figures, a conventional damper has been shown.
  • the damping or braking means does not act on the movable part during a first part of the stroke . This is why the mobile part has been dissociated from the damping means by providing a free stroke of the mobile part before the latter is slowed down. It follows that when the moving part encounters the damping or braking means at full speed, there is a violent impact generating various destructions, all the more so when one is in presence of accelerations of the order of 30,000 g and speeds of the order of 30 m / s.
  • damping means use a fluid which is forced to pass through one or more orifices to create pressure drops by increasing speed.
  • the fluid speeds are so high that the jets of the latter are capable of destroying elements such as seals or guide nozzles.
  • a damping pump such as that described in the document DE-U-6 606 297 mentioned above.
  • the mobile part of the circuit breaker and the mobile part of the damping means are at the end of the travel and the circuit breaker must be reset and therefore the electric circuit must be closed.
  • the movement of the active part of the damping means is generally slower than that of the mobile part of the circuit breaker, the latter having to be rapid in order to avoid the formation of pre-arcs . It follows that, if the circuit breaker trips again, before the active part of the damping means is returned to the starting position, the movable part of the circuit breaker no longer finds a brake and comes crashing against the active part of the means of depreciation.
  • the present invention aims to provide a hyper-fast circuit breaker which does not have the abovementioned drawbacks, more particularly a hyper-fast circuit breaker of the aforementioned type equipped with a damping means which allows significant acceleration at the start of the travel the moving part of the circuit breaker and progressive braking, without rebounding and without using a mechanical stop, at the end of the race.
  • the damping means must be provided to allow an acceleration of the order of 30,000 g or more providing a speed of up to 40 m / s over a very reduced distance of the order of 2 to 3 mm, then to brake gradually the moving part until it stops on a stroke of 30 to 40 mm while limiting the stresses. It must be simple and robust in construction and inexpensive and not require frequent maintenance.
  • the hyper-fast circuit breaker assisted by a semiconductor control circuit comprises a repulsion coil, a repulsion disc associated with a contact bridge carrying the movable contacts, said repulsion disc collaborating with said coil. repulsion, a means for retaining contacts in the closed state, which exerts sufficient pressure to resist an imposed contact pressure and which is arranged in a liberal manner during the repulsion of the disc under the effect of the repulsion coil, and a damping means, said damping means comprising a plunger rod integral with the repulsion disc and a reservoir containing fluid intended to absorb the kinetic energy of the repulsion disc - plunger rod assembly during repulsion by the repulsion coil, by adapting the shapes of the plunger rod and of the reservoir with respect to one another so as to have sectio variable fluid discharge ns depending on the stroke of the plunger rod.
  • the present invention thus provides a hyper-fast circuit breaker described above equipped with a simple damping means, which allows braking of the movement of the mobile part of said circuit breaker without impact against a mobile or fixed mechanical stop, over a reduced stroke. , while allowing rapid opening of the contacts at the start of the race.
  • the shapes of the reservoir and the plunger rod are adapted so that at the start of the stroke the discharge section is relatively large and that as as the plunger rod sinks into the fluid reservoir, said section narrows, braking is progressive while allowing significant acceleration at the start of the race. Since, moreover, the plunger rod is integral with the repulsion disc, the device does not suffer the disadvantages due to the impacts of the movable part of the circuit breaker on an active part of the damping means.
  • the repulsion disc-plunger rod assembly is in one piece. There is no possible mechanical play between these elements, which move at the same speed after repulsion.
  • This embodiment is specially adapted to a hyper-fast circuit breaker, in which the very high accelerations and speeds reached would quickly cause degradation of elements connected together by mechanical means with one or more degrees of freedom.
  • the repulsion disc-plunger rod assembly may consist of a single piece or of several pieces joined together, for example by welding, or by assembly. These parts can in particular be screwed under a prestress such that no play is likely to appear between them during accelerations or decelerations linked to the operation of the hyper-fast circuit breaker.
  • the device of the invention does not require any particular mechanism such as nozzles, or mobile mechanisms such as valves ... etc. which are generally sensitive to breakdowns and which does not use a spring which has been described the above drawbacks.
  • the movement of a fluid which does not undergo any wear or rupture is used for braking.
  • the damping means is immediately ready to enter into action again, even if the stroke has been incomplete.
  • Another advantage lies in the fact that the device of the invention is self-centering.
  • the reservoir advantageously has an essentially cylindrical shape and the plunger rod has a profiled end widening from the end.
  • a profiled shape constituted by a succession of truncated cones having different angles of conicity, or by a continuous curve making it possible to obtain a braking force as constant as possible.
  • the braking characteristic can be adjusted by adapting this curve. It is also possible to provide a substantially straight cylindrical or rectangular plunger rod associated with a reservoir the internal face of which is profiled and is for example made up of a succession of truncated cones with different taper relative to one another or a continuous curve to obtain the most constant braking force possible.
  • the mobile part of the hyper-fast circuit breaker is made of a relatively light material in order to reduce the inertia.
  • the plunger rod can also be made of a light material, in particular a high-strength aluminum alloy. The increase in the mass of the mobile part is thus relatively small compared to the circuit breaker described in documents EP-A-0 184 566 and 0 348 584 (mentioned above).
  • the braking stroke is independent of the maximum speed reached by the mobile part of the circuit breaker according to the invention.
  • the circuit breaker 1 comprises a cylinder 3 closed at one end by a bottom cover 5 which is fixed thereto by means of a flange 7, a ring 9 housed in a corresponding groove 11 of said cylinder, the cover being tightened by means of screws or bolts 13, and closed at the other end by a second cover 15 which is fixed thereto in a similar manner by a flange 17, a ring 19 and screws or bolts 21.
  • Said cylinder 3 comprises, inside, a piston 25 which can slide therein, and a pressure spring 27 which is supported on the bottom cover 5 and on a shoulder 29 formed in said piston.
  • Said piston is surmounted by a sleeve 31 which passes through the cover 15 in its corresponding central opening 16.
  • Said sleeve 31 is surmounted, at its free end, by the retaining means bearing the general reference 33.
  • the circuit breaker according to the present invention is surmounted by a repulsion coil 35 advantageously cast in a resin 35 ′, the whole being assembled by bolts or threaded rods 36.
  • It also comprises a repulsion disc 37 associated with a contact bridge 39 carrying the movable contacts 41, and with a tail 43 and plunger rod 95 described in more detail below.
  • the retaining means 33 mounted on the end of the sleeve 31 by screwing for example comprises a plurality of balls or rollers 51 which are applied against the tail 43 of the repulsion disc 37 by means of an adjustable pressure.
  • the tail 43 is made integral with the repulsion disc 37.
  • the tail 43 preferably has 4 inclined planes 62 which deviate from the axis 38 away from the repulsion disc 37 and is provided at the end close to the repulsion disc 37 of a shoulder 63 and, at the end free, of a groove 65.
  • the circuit breaker further comprises a damping means described in more detail later.
  • the spring 27 which is preferably precompressed keeps the piston 25 and, therefore, the sheath 31 in the high position, the repulsion disc being in the low position, away from the repulsion coil.
  • cylindrical wall of the piston 25 also acts as a mechanical stop for the spring 27 preventing it from being compressed with contiguous turns.
  • the cylindrical wall is also dimensioned in such a way that, when the spring 27 is compressed to the maximum, the balls or rollers 51 engage in the grooves 65.
  • the sleeve 31 integral with said piston 25 drives with it, via the retaining means, and more particularly the balls or rollers 51, the tail 43, the plunger rod 95 and, consequently, the repulsion disc 37 until the bridge contact bearing the movable contacts comes into contact with the fixed contacts (figure 1, right part).
  • the force of the springs 55 must therefore be sufficient to maintain the balls or rollers 51 in the grooves 65 during this step and to ensure optimum contact pressure.
  • the electronic control circuit sends a current pulse in the shape of a warhead in the repulsion coil 35 and by electrodynamic effect on the currents induced in the disc 37.
  • This high force makes it possible to dislodge the balls or rollers 51 from the grooves 65 by crushing the springs 55 thus releasing the mobile part.
  • the repulsion disc associated with the contact bridge 39 and the tail 43 integral with the plunger rod 95, subjected to the repulsion force undergoes a particularly high acceleration; which reduces the risk of arcing and contact wear or quickly creating a sufficient distance between fixed and mobile contacts.
  • the repulsion disc thus accelerated between 20,000 and 40,000 g at speeds between 10 and 50 m / s over 1 to 5 mm must then be braked over a stroke of 20 to 40 mm.
  • the braking role is played by the damper 97 and by the balls or rollers 51 which also allow immobilization down the disc 37.
  • the damping means 97 essentially comprises the plunger rod 95 integral with the repulsion disc 37 and a fluid reservoir 99.
  • the shapes of the rod 95 and of the reservoir 99 are adapted so that the cross section of the rod which enters the tank 99 varies the annular evacuation section fluid between said rod and said reservoir during its movement.
  • the tank 99 has an essentially cylindrical shape comprising a conical profiled zone while the end of the rod 95 is constituted by a succession of truncated cones having a different angle of conicity one of the 'other.
  • the fluid reservoir 99 is advantageously housed in a sheath 103 closed by a cover 104, which is equipped, on the side opposite to said reservoir, with sealing means, in particular three seals, a seal 105, a fixed seal 106 and a scraper seal 107.
  • the sealing seals are advantageously retained in their housing by means known per se such as elastic rings or screwed and glued assemblies.
  • the plunger rod 95 is advantageously guided in a guide ring 109 with self-lubricating lining 110.
  • This ring is advantageously disposed between the reservoir 99 and the seals 105, 107.
  • Said guide ring 109 is advantageously fitted with a protective skirt 113 which prevents the jets of fluid from damaging the self-lubricating ring 110 and / or the seals 105 and 107.
  • An air volume 102 is provided above the upper level of the fluid 101. Since the reservoir 99 is closed by the ring 109, the total volume occupied by the fluid 101 and the air 102 is constant. The penetration of the plunger rod 95 into the fluid 101 during the repulsion induces a corresponding rise in the level of the fluid 101 inside the reservoir 99, this rise being compensated by the compression of the air volume 102.
  • the reservoir 99 is, in the embodiment shown, consisting of a single piece.
  • An advantageous alternative is to manufacture the tank in two parts, the part used for braking the plunger rod 95 being surmounted by a bracing ring.
  • the plunger rod is made of a light alloy with high resistance treated on the surface at least on the part coming into contact with the self-lubricating ring and the seals 105 and 107.
  • a light alloy with high resistance treated on the surface at least on the part coming into contact with the self-lubricating ring and the seals 105 and 107 In the case of the example, an aluminum alloy treated by hard anodization was used.
  • the plunger rod 95 can be formed, in one piece with the repulsion disc 37 and / or with the tail 43. It is however also possible to provide an assembly, in particular a glued screw connection.
  • the sheath 103 in which the various elements are housed is advantageously introduced from below into the hyper-fast circuit breaker and fixed by a flange 115 on the external surface of the bottom cover 5.
  • the sheath comprising in particular the reservoir with its full of fluid can possibly be introduced lying down in the circuit breaker without the fluid being able to escape (ease of assembly, for example).
  • FIG. 3 there is shown another embodiment in which the plunger rod 95 integral with the repulsion disc 37 is of essentially straight cylindrical or rectangular shape and associated with a fluid reservoir 99 whose internal face is profiled by a curve constructed so that said tank is crushed upwards.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Circuit Breakers (AREA)
  • Breakers (AREA)
EP91903322A 1990-02-23 1991-02-18 Disjoncteur hyper-rapide Expired - Lifetime EP0516640B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91903322T ATE95944T1 (de) 1990-02-23 1991-02-18 Schnellwirkender lastschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP90870030 1990-02-23
EP90870030 1990-02-23

Publications (2)

Publication Number Publication Date
EP0516640A1 EP0516640A1 (fr) 1992-12-09
EP0516640B1 true EP0516640B1 (fr) 1993-10-13

Family

ID=8206066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91903322A Expired - Lifetime EP0516640B1 (fr) 1990-02-23 1991-02-18 Disjoncteur hyper-rapide

Country Status (15)

Country Link
US (1) US5521569A (pt)
EP (1) EP0516640B1 (pt)
JP (1) JPH071659B2 (pt)
KR (1) KR0183451B1 (pt)
AU (1) AU653329B2 (pt)
BR (1) BR9106069A (pt)
CA (1) CA2076675C (pt)
CZ (1) CZ279386B6 (pt)
DE (1) DE69100511T2 (pt)
ES (1) ES2044724T3 (pt)
HU (1) HU208590B (pt)
PL (1) PL167473B1 (pt)
SK (1) SK278078B6 (pt)
WO (1) WO1991013452A1 (pt)
ZA (1) ZA911157B (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010017900A1 (de) * 2010-04-21 2011-10-27 Abb Ag Installationsschaltgerät mit einer Doppelunterbrechung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19613568A1 (de) * 1996-04-04 1997-10-09 Asea Brown Boveri Leistungsschalter
DE10030187A1 (de) * 2000-06-20 2002-01-03 Siemens Ag Verfahren zum Öffnen der Schaltstrecke einer Vakuumschaltröhre
US11183348B1 (en) * 2020-07-21 2021-11-23 Eaton Intelligent Power Limited Vacuum circuit interrupter with decelerator with integrated latch assembly
CN112927982B (zh) * 2021-01-25 2022-03-22 西安交通大学 可降低快速真空开关合分闸反弹的弹簧保持装置及工作方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6606297U (pt) * 1965-08-19 1970-09-10 Sachsenwerk Licht Und Kraft Ag
NL135712C (pt) * 1969-03-14
SE385342B (sv) * 1974-09-30 1976-06-21 Asea Ab Manoverdon for snabb till-fran-manover av motstandskontaktstelle i hogspenningstryckgasbrytare
US4209680A (en) * 1978-06-26 1980-06-24 Gould Inc. High speed actuating mechanism
DE2843368C2 (de) * 1978-10-05 1982-09-02 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Stoßdämpfer für elektrische Leistungsschalter
SE424483B (sv) * 1980-11-27 1982-07-19 Asea Ab Dempdon for elektriska brytare
JPS6042421U (ja) * 1983-08-26 1985-03-26 アイダエンジニアリング株式会社 トランスファ金型のスクラップ排出装置
EP0184566B1 (fr) * 1984-10-12 1991-08-07 S.A. Acec Transport Disjoncteur hyper rapide assisté par semi-conducteurs
DD240974A1 (de) * 1985-09-11 1986-11-19 Liebknecht Transformat Einrichtung zur daempfung der bewegten masse, insbesondere von hochspannungsleistungsschaltern, kurzschliessern und dergleichen
ATE93647T1 (de) * 1988-06-27 1993-09-15 Acec Transport Sa Durch einen ausloesekreis betaetigter schnellschalter.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010017900A1 (de) * 2010-04-21 2011-10-27 Abb Ag Installationsschaltgerät mit einer Doppelunterbrechung

Also Published As

Publication number Publication date
EP0516640A1 (fr) 1992-12-09
AU653329B2 (en) 1994-09-29
CS9100464A2 (en) 1991-10-15
PL167473B1 (pl) 1995-09-30
BR9106069A (pt) 1993-02-02
DE69100511T2 (de) 1994-03-10
JPH071659B2 (ja) 1995-01-11
DE69100511D1 (de) 1993-11-18
CA2076675A1 (en) 1991-08-24
HUT61127A (en) 1992-11-30
ZA911157B (en) 1992-02-26
JPH05504229A (ja) 1993-07-01
AU7210591A (en) 1991-09-18
SK278078B6 (en) 1995-12-06
WO1991013452A1 (fr) 1991-09-05
CA2076675C (en) 1999-09-14
CZ279386B6 (cs) 1995-04-12
HU208590B (en) 1993-11-29
KR0183451B1 (ko) 1999-05-15
ES2044724T3 (es) 1994-01-01
US5521569A (en) 1996-05-28

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