EP0444568A1 - Lastschalter unterstützt durch Varistor - Google Patents

Lastschalter unterstützt durch Varistor Download PDF

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Publication number
EP0444568A1
EP0444568A1 EP91102721A EP91102721A EP0444568A1 EP 0444568 A1 EP0444568 A1 EP 0444568A1 EP 91102721 A EP91102721 A EP 91102721A EP 91102721 A EP91102721 A EP 91102721A EP 0444568 A1 EP0444568 A1 EP 0444568A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
varistor
switch
fixed
contact
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
EP91102721A
Other languages
English (en)
French (fr)
Other versions
EP0444568B1 (de
Inventor
Doan Pham Van
Joseph Martin
Edmond Thuries
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
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
Priority claimed from FR9002416A external-priority patent/FR2658949B1/fr
Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0444568A1 publication Critical patent/EP0444568A1/de
Application granted granted Critical
Publication of EP0444568B1 publication Critical patent/EP0444568B1/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
    • H01H33/16—Impedances connected with contacts
    • H01H33/161—Variable impedances

Definitions

  • the present invention relates to a high-voltage circuit breaker equipped with varistors to limit overvoltages at cut-off.
  • High voltage circuit breakers which are equipped with varistors, in particular for operating the shunt reactors of the electrical networks; the purpose of the presence of varistors, also called non-linear resistors or variable resistors or resistors depending on the voltage, is to reduce overvoltages.
  • An object of the present invention is to provide a circuit breaker based on this principle, the production of which is simple and economical.
  • the invention applies equally to circuit breakers, of conventional or shielded type, in which the varistor is arranged, for each of the poles of the circuit breaker, in a column separate from that which contains the breaking chamber, as well as to circuit breakers in which the varistor is placed in the same column as the breaking chamber.
  • the invention applies to circuit breakers having several breaking chambers in series per phase, and in particular to circuit breakers having two breaking chambers per phase, arranged in T or V.
  • the subject of the invention is a circuit breaker comprising, for each pole, at least one breaking chamber with fixed contacts and a movable assembly comprising movable contacts, and, in parallel on each chamber, an assembly comprising a varistor and a switch in series, said switch being open when the circuit breaker is tripped and closed when the circuit breaker is tripped; said switch comprises a movable contact driven by the movable assembly when the circuit breaker performs an engagement maneuver, said movable contact being subject to follow, with a certain delay, the movement of the movable assembly when the circuit breaker performs a tripping operation .
  • the varistor is produced in two stacks of varistor elements, the two stacks being separated by a distance at least equal to the insulation distance of the circuit breaker, one of the batteries being traversed by said movable contact made in the form of a metal rod fixed to a metal hose connecting the two columns outside and above them, a end of the second stack of elements being provided with a female contact cooperating with said rod.
  • Said flexible hose is fixed, inside the column containing the breaking chamber, to a thrust arm, in the direction of the moving element, by a spring, said arm being able to be brought into contact with the moving element by means of insulating rods.
  • Said arm carries a first cylinder provided with a collar defining with a second fixed cylinder provided with a collar a variable volume, said volume being maximum when the circuit breaker is in the on position, said volume being leak tight near and constituting a device for delaying the movement of said arm during a tripping operation of the circuit breaker.
  • one of said cylinders carries an adjustable valve.
  • the varistor is produced in two stacks of varistor elements, the two stacks being separated by a distance at least equal to the distance of isolation of the circuit breaker, one of the batteries being traversed by said movable contact made in the form of a metal rod passing through one of the batteries, the other battery being provided with a female contact for receiving said rod.
  • Said metal rod is fixed to a first end of an insulating rod, the other end of which is fixed to a mobile arm, said arm being pushed by a spring in the direction of the mobile assembly, said arm being brought into contact with the mobile equipment by means of insulating rods, arms and fingers.
  • Said arm carries a first cylinder provided with a flange defining with a second fixed cylinder provided with a flange a variable volume, said volume being maximum when the circuit breaker is in the on position, said volume being leak tight near and constituting a delay device movement of said arm during a tripping operation of the circuit breaker.
  • one of said cylinders carries an adjustable valve.
  • the varistor being always placed in the same column as the breaking chamber, the varistor is made in a single stack of varistor elements, said movable contact is made in the form of a metal rod fixed to a movable arm, said arm sliding in a guide tube integral with an insulating cone, one end of the stack carrying a female contact cooperating with said rod.
  • Said arm carries a first cylinder provided with a flange defining with a second fixed cylinder provided with a flange a variable volume, said volume being maximum when the circuit breaker is in the on position, said volume being leak tight near and constituting a delay device movement of said arm during a tripping operation of the circuit breaker.
  • one of said cylinders carries an adjustable valve.
  • resistive discs are inserted in the batteries of varistor elements.
  • the invention also relates to a circuit breaker comprising, for each pole, at least one insulating column containing a breaking chamber with fixed contacts and a movable assembly comprising movable contacts, and, in parallel on each breaking chamber, a second insulating column comprising a varistor and a switch in series, said switch being open when the circuit breaker is tripped and closed when the circuit breaker is tripped, said circuit breaker further comprising, inside each breaking chamber, a resistor associated with a mechanism for its insertion for a short time on closing of the circuit breaker, characterized in that said switch comprises a movable contact connected by a hose to the mechanism for inserting the resistor, said hose connecting the two columns outside thereof.
  • the invention relates to any circuit breaker (conventional with insulating envelope or shielded with metallic envelope) provided with a varistor associated with a switch in which said switch is operated by a metallic hose, the main chamber being with an insulating or metallic envelope.
  • the flexible maneuvering arrangement makes it possible to avoid any system of connecting rods, which makes the device particularly simple while being very reliable.
  • This device is very simple, the switch and the varistor being arranged in a porcelain envelope filled with sulfur hexafluoride (SF6).
  • SF6 sulfur hexafluoride
  • the switch in series has a lower cut-off interval and tripping speed than those of the cut-out chamber.
  • Another characteristic of the invention makes it possible to improve the breaking capacity of the switch in series while retaining an acceptable voltage stress on the varistor when the circuit breaker is in the tripped position.
  • the means for conferring on the switch the desired capacity comprise first and second fixed metal armatures facing each other, in electrical connection respectively with the movable contact and the fixed contact of the switch.
  • Said reinforcements have the form of rings or have a large facing flat surface.
  • the means for giving the switch the desired capacity comprise at least one cylinder of material with high dielectric constant, in electrical contact at its respective ends with fixed plates in electrical connection respectively with the movable contact and the fixed switch contact.
  • the material of the cylinders is araldite quartz.
  • said cylinder is a commercial ceramic capacitor.
  • the circuit breaker of Figure 1 is shown in the tripped position. It comprises an insulating envelope 1, preferably made of porcelain, enclosing the breaking chamber, and resting on an insulating column 100, one of which only part has been represented. Column 1 is closed at its upper part by a metal cover 1A.
  • the interior 2 of the envelope 1 is sealed and contains a gas with high dielectric strength, such as sulfur hexafluoride, under a pressure of a few bars.
  • a gas with high dielectric strength such as sulfur hexafluoride
  • the circuit breaker comprises a fixed main contact formed by a tube 3 mechanically and electrically connected by arms 4 to a first socket 5, in electrical contact with the cover 1A.
  • the contact 3 is integral with a fixed arcing contact 6 also consisting of a tubular part; this contact 6 is electrically connected to contact 3.
  • the moving element of the circuit breaker comprises a movable main contact formed by contact fingers 9, protected by a corona hood 10 and cooperating with the tube 3. It also includes an arcing contact formed by fingers 11, cooperating with a nozzle blowing 12.
  • the blowing means which are not part of the present invention, have not been shown.
  • the moving element is connected in a known manner to an operating rod, not shown.
  • the movable electrical contacts are electrically connected to each other by a disc 13 itself fixed to a metal cylinder 14 electrically connected by sliding contacts not shown to a second socket 5A.
  • the varistor is arranged inside a sealed insulating column 20 closed at its ends by metal plates 21 and 22, electrically connected to the terminals of the circuit breaker by conductors 23 and 24.
  • the interior of the envelope is filled with 'sulfur hexafluoride.
  • the varistor is made up of varistor elements in the form of discs based on zinc oxides, stacked in two coaxial but separate piles 26 and 36.
  • the stack 26, made up of elements 26A, is placed inside an insulating cylinder 27 fixed under the upper plate 21; the cylinder 27 is closed at its lower part by a metal plate 28 extended by a cylindrical part 28A; the lower element of the stack 26 is in tight contact with the plate 28 thanks to the pressure exerted by a spring 29 resting on the one hand on a metal plate 30 located at the top of the stack 26 and on the other hand on the plate 21.
  • a metal braid 31 provides electrical continuity between the battery 26 and the plate 21.
  • the discs 26A of the stack 26 are pierced in their center with a hole so that the axis of the stack has a cylindrical channel in which a rod can slide, as will be seen below.
  • the cylindrical part 28A has a central bore for the passage of the rod.
  • the battery 36 is placed inside an insulating cylinder 37, fixed above the plate 22; the elements 36A of the stack 36 do not have a central hole; to the upper part of the cylinder 37 is fixed a metal cover 38 provided with a cylindrical protuberance 38A intended to receive the rod which has been mentioned above. Between the lower element of the stack 36 and the plate 22, and separated by a metal washer 39 are disposed resistant disks 40 whose role will be explained later.
  • the stack is clamped by a spring 41 resting on the one hand on the cover 38 and on the other hand on a metal plate 42 surmounting the battery 36.
  • a metal braid 43 ensures electrical continuity between the battery 36 and the plate 38.
  • the cover 1A carries, at its lower part, a metal cylinder 50 provided with lights in which slides a metal arm 51.
  • a metal hose 52 which passes through the cover 1A through an orifice of the latter ;
  • the other end of the metal hose is connected to a rod 53, made of insulating material, which engages in the axis of the stack 26;
  • the other end of the rod 53 is fixed to a metal rod 54 which passes through the cylinder 28A and cooperates electrically with the latter by means of sliding contacts 28B.
  • the hose 52 runs, outside the columns 1 and 20, in a flexible sheath 56 connected in leaktight manner to the cover 1A and to the cover 21.
  • the arm 51 is pushed by a spring 57 bearing on the cover 1A.
  • Insulating rods 58 fixed at one end to the arm 51, bear at their other end on the corona hood 10 of the circuit breaker.
  • the apparatus is completed by a device making it possible to delay the movement of the arm 51, when, the circuit breaker being in the latched position, a trip suddenly drives the moving assembly downwards in the figure.
  • This device comprises a first cylinder 60 fixed to the cover 1A and provided with a flange 61 towards the outside, and a second cylinder 62, integral with the arm 51 and provided with a flange 63 turned inwards and placed above of the collar 61; in this way, the cylinders and the flanges define a variable and tight volume 64, except for leaks; these leaks can be calibrated by a valve 65 placed for example on the cylinder 62.
  • the total length of the hose 52, the insulating rod 53 and the metal rod 54, and the distance between the batteries 26 and 36 are chosen so that, when the circuit breaker is in the tripped (open) position, the rod 54 is in its position furthest from contact 38A and that, when the circuit breaker is in the latched (closed) position, the rod 54 is in contact with contact 38A; this amounts to saying that the travel A of the circuit breaker is equal to the travel of the switch constituted by the rod 54 and the contact 38A.
  • the operation of the device is as follows.
  • the moving element In the engaged position, the moving element is in the high position; the rods 58 are pushed back by the cover 10, the arm 51 is in the high position, the spring 57 is compressed, the volume 64 is maximum, the switch 54-38A is closed. Varistor 26-36 is short-circuited by the circuit breaker contacts.
  • the resistors 40 serve to reduce the voltage on the varistors 26 and 36 in the event of high restored voltage.
  • FIG. 2 illustrates the implementation of the invention in a circuit breaker in which the varistor is arranged in the same column as the breaking chamber.
  • the cover 1A is this time replaced by a metal cover 70 containing the batteries 126 and 136 of varistor.
  • the cover 70 is electrically connected to the socket 5.
  • the battery 126 made up of varistor elements 126A in the form of discs without a central hole, is contained in an insulating tube 71; at the top of the stack is placed a metal disc 72 on which one end of a spring 73 rests, the other end of which rests on the cover.
  • a braid 74 provides electrical contact between the cover and the battery 26A.
  • another metal disc 75 shaped so as to constitute a female contact 75A which can cooperate electrically with a contact rod.
  • the battery 136 made up of varistor elements 136A in the form of discs with central hole, is contained in an insulating tube 77; at the upper part of the stack 36A is placed a metal plate 78, pierced at its center and serving as a support for a spring 79; the spring 79 is also supported on a metal plate 80 pierced in its center and extended by a cylinder 80A serving as a guide for a contact rod.
  • a braid 82 provides electrical continuity between the plate 78 and the plate 80.
  • the plates 75 and 80 are held together by an insulating tube 83 fixed to the plates by metal beads 84 and 85.
  • the lower part of the stack 136 is held by a plate 87, pierced in its center, and extended downwards by a metal tube 88 in which are made longitudinal slots allowing the sliding of a metal arm 89.
  • a metal tube 88 in which are made longitudinal slots allowing the sliding of a metal arm 89.
  • At the arm 89 are fixed metal arms 91 and 92 provided with contact fingers 91A and 92A coming into contact with the cylinder 14 to ensure electrical continuity between the sockets 5A and 5 through the varistor 126-136.
  • Insulating rods 95 are also fixed to the arm 89; when the movable assembly moves upwards in the figure (in the event of a reclosing of the circuit breaker), the rods drive the arm 89 and consequently, move the rod 94, the end of which engages in contact 75A.
  • the distance between the plates 75 and 80 has been chosen so that the travel of the switch, constituted by the rod 94 and the contact 75A, is equal to the travel of the circuit breaker; to illustrate this circuit breaker stroke, there is partially shown in dashed lines, the nozzle in the position it occupies when the circuit breaker is in the engaged position.
  • the arm 89 is pushed back by a spring 96 placed between the plate 87 and the arm; the arm is therefore biased towards the bottom of the figure.
  • the device is supplemented by means for slowing down the movement of the arm 89 when, the circuit breaker being initially closed and the spring 96 bandaged, the circuit breaker is opened, which produces a rapid downward movement of the figure of the moving assembly.
  • These means include a first cylinder 97 fixed to the plate 87 and provided with a flange 98 facing outwards, and a second cylinder 101 fixed to the arm 89 and provided with a flange 102 facing inwards and placed above above the collar 98.
  • This assembly delimits a volume 103 which is leak-tight; these leaks can be adjusted by means, for example, of a valve 104 carried by the cylinder 101.
  • the operation of the device is as follows.
  • the moving element In the engaged position, the moving element is in the high position; the rods 95 are pushed back by the cover 10, the arm 89 is in the high position, the spring 97 is compressed, the volume 103 is maximum, the switch 94-75A is closed. Varistor 126-136 is short-circuited by the circuit breaker contacts.
  • the battery is contained in an insulating tube 77A; a metal block 110 is fixed to an insulating cone 111 resting on the top of the column 1.
  • the block 110 carries all the elements carried by the disc 87 of FIG. 2 and in particular the tube 88, the arm 89 and the cylinder 97.
  • a hole 112 in the cone 111 allows the passage of the isolating gas from the circuit breaker inside the cover 70.
  • varistor stacks in FIGS. 1 and 3 can include, like the stack 36 in FIG. 1, resistive elements 40.
  • FIG. 4 represents an alternative embodiment of the invention, applied to a circuit breaker in which the varistor is placed in a column 20 distinct from column 1 enclosing the breaking chamber; but unlike Figure 1, the switch is operated by a mechanism directly connected to the operating rod of the circuit breaker.
  • the insulating column supporting the breaking chamber and enclosing the insulating operating rod 121.
  • the latter is extended by a metal portion 122 connected to the movable element of the breaking chamber. It is also connected to a hose 123 fixed to the rod 154 of the switch, with the interposition of a delay mechanism 160, which can be similar to those previously described.
  • the rod 154 of the switch cooperates with a contact fixed at the end of the battery of varistors 26.
  • the hose is placed in an insulating sheath 123. The operation is identical to those described above.
  • FIG. 5 shows how the invention can be applied to a circuit breaker having two breaking chambers 201 and 202, arranged in a T shape.
  • the reference 203 designates an insulating column common to the two breaking chambers and placed on a metal frame 204 carrying an operating mechanism 205.
  • An operating rod 206 common to the two breaking chambers, ensures the opening and closing of the two chambers of the circuit breaker by means of a mechanism 207.
  • the interrupting chambers 201 and 202 are each associated with an insulating column; these columns are respectively referenced 211 and 212; they each contain a varistor in two batteries; only column 211 is shown in detail; column 211 contains a stack of varistor elements 216A without central hole, terminated by a contact 218 and a stack of varistor elements 236A, with central hole, supported by a metal cone 219 electrically connecting the end of the battery to a terminal of the breaking chamber 211.
  • the elements 236A are traversed by an insulating hose 220 connected at one end to the operating rod 206 by means of a delay mechanism 260. The second end of the hose is connected to a metal rod 221 cooperating with contact 218. The hose, outside the stack of elements 236A, is placed in a sheath 222.
  • circuit breaker The operation of the circuit breaker is completely identical to the operation of the circuit breakers of Figures 1 to 4.
  • the varistor behaves like a capacitor.
  • the varistor has a capacity of between twenty and thirty picofarads, the exact value depending on the diameter and the height of the varistor.
  • the switch in series has its own capacity of the same order of magnitude, the voltage restored between its terminals will then be approximately half of that applied to the breaking chamber which is connected in parallel on the varistor and switch assembly.
  • the varistor In case of phase opposition at 2 p.u. for example, the varistor will only be subjected to a voltage equal to 1 p.u.
  • the fixed and facing reinforcements can take the form of washers or any other shape provided that the reinforcements have a large planar facing surface.
  • the varistor-armature assembly can be used to protect the line against high lightning strikes or high operating overvoltages.
  • the value of the capacity of the serial switch is adjusted by placing, between the plates 28 and 38, suitably enlarged, cylindrical parts 310, made for example of araldite quartz or any other material having a large dielectric constant.
  • a ceramic capacitor 40 mm long and 18 mm in diameter could give a capacity of about 25 picofarads.
  • the invention finds application in the production of conventional high-voltage line circuit breakers (with an insulating jacket). or shielded (with metal casing), as well as circuit breakers used to connect reactors or capacitor banks.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Thermistors And Varistors (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Valve Device For Special Equipments (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
EP91102721A 1990-02-27 1991-02-25 Lastschalter unterstützt durch Varistor Expired - Lifetime EP0444568B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9002416 1990-02-27
FR9002416A FR2658949B1 (fr) 1990-02-27 1990-02-27 Disjoncteur a coupure assistee par varistance.
FR909006787A FR2662848B2 (fr) 1990-02-27 1990-05-31 Disjoncteur a coupure assistee par varistance.
FR9006787 1990-05-31

Publications (2)

Publication Number Publication Date
EP0444568A1 true EP0444568A1 (de) 1991-09-04
EP0444568B1 EP0444568B1 (de) 1995-06-21

Family

ID=26227887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102721A Expired - Lifetime EP0444568B1 (de) 1990-02-27 1991-02-25 Lastschalter unterstützt durch Varistor

Country Status (10)

Country Link
US (1) US5170023A (de)
EP (1) EP0444568B1 (de)
JP (1) JPH04230922A (de)
CN (1) CN1022959C (de)
AT (1) ATE124167T1 (de)
BR (1) BR9100768A (de)
CA (1) CA2037119C (de)
DE (1) DE69110499T2 (de)
ES (1) ES2074595T3 (de)
FR (1) FR2662848B2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536039A1 (de) * 1991-10-02 1993-04-07 Gec Alsthom Sa Ultra-Hochspannungsschalter
FR2687246A1 (fr) * 1992-02-07 1993-08-13 Alsthom Gec Parafoudre a oxyde de zinc a eclateur serie.
DE4204559A1 (de) * 1992-02-13 1993-08-19 Slamecka Ernst Verfahren zur schaltspannungsbegrenzung

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FR2674984B1 (fr) * 1991-04-05 1993-06-11 Alsthom Gec Disjoncteur a sf6 a varistance et a condensateur incorpores.
FR2676587B1 (fr) * 1991-05-17 1994-06-10 Alsthom Gec Disjoncteur a grand pouvoir de coupure.
DE4207983A1 (de) * 1992-03-13 1993-09-16 Asea Brown Boveri Reaktorschalter
JPH07320611A (ja) * 1994-05-23 1995-12-08 Hitachi Ltd ガス絶縁開閉装置
CN1061944C (zh) * 1997-07-11 2001-02-14 鲜荣忠 硫精矿粉和含硫尾矿砂制块炼硫的方法
FR2770696B1 (fr) * 1997-11-06 1999-12-31 Gec Alsthom T & D Sa Ligne electrique a isolation gazeuse et a condensateur de puissance incorpore
US6316742B1 (en) 1999-07-14 2001-11-13 Southern States, Inc. Limited restrike circuit interrupter used as a line capacitor and load switch
US6236010B1 (en) 1999-07-14 2001-05-22 Southern States, Inc. Circuit interrupter including a penetrating electrical contact with grip and release structure
FR2826503B1 (fr) * 2001-06-25 2003-09-05 Alstom Chambre de coupure avec ampoule a vide
FR2840729B1 (fr) * 2002-06-05 2004-07-16 Alstom Dispositif interrupteur pour haute ou moyenne tension, a coupure mixte par vide et gaz
DE102006058042A1 (de) * 2006-12-07 2008-06-19 Abb Technology Ag Kontaktantriebsanordnung
EP2117025B1 (de) * 2008-05-06 2012-12-19 ABB Technology AG Mittelspannungs-Schalteinheit
CN101286636B (zh) * 2008-05-23 2010-06-09 卢为忠 操作过电压吸收装置
US9054530B2 (en) 2013-04-25 2015-06-09 General Atomics Pulsed interrupter and method of operation
DE102019212106A1 (de) 2019-08-13 2021-02-18 Siemens Energy Global GmbH & Co. KG Schaltgeräte mit zwei in Reihe geschalteten Unterbrechereinheiten
CN111685625B (zh) * 2020-06-09 2021-11-05 扬州晨笑刷业有限公司 一种牙膏定量挤出器
CN112151301B (zh) * 2020-06-15 2022-12-30 平高集团有限公司 一种灭弧室和断路器
CN113921298B (zh) * 2021-09-03 2023-09-29 平高集团有限公司 一种电阻触头及使用该电阻触头的断路器
US12112905B2 (en) * 2022-11-17 2024-10-08 Southern States, Llc Alternative gas current pause circuit interrupter
CN117559275B (zh) * 2023-11-21 2024-11-15 西电宝鸡电气有限公司 一种手车式相控断路器及开关柜

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FR2512267A1 (fr) * 1981-08-26 1983-03-04 Alsthom Atlantique Disjoncteur a gaz comprime muni de resistances d'ouverture et de fermeture
DE3444317A1 (de) * 1984-11-12 1986-05-15 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Reaktorschalter
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1253332B (de) * 1965-04-07 1967-11-02 Licentia Gmbh Anordnung zum Abschalten hoher Stroeme
US3912974A (en) * 1970-02-18 1975-10-14 George Leslie Hill Circuit breaker
DE2251138A1 (de) * 1972-10-16 1974-04-18 Mahdjuri Sabet Faramarz Dr Ing Schaltsystem
FR2512267A1 (fr) * 1981-08-26 1983-03-04 Alsthom Atlantique Disjoncteur a gaz comprime muni de resistances d'ouverture et de fermeture
DE3444317A1 (de) * 1984-11-12 1986-05-15 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Reaktorschalter
EP0368249A2 (de) * 1988-11-08 1990-05-16 Mitsubishi Denki Kabushiki Kaisha Trennschalter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536039A1 (de) * 1991-10-02 1993-04-07 Gec Alsthom Sa Ultra-Hochspannungsschalter
FR2682219A1 (fr) * 1991-10-02 1993-04-09 Alsthom Gec Disjoncteur ultra haute tension.
US5304760A (en) * 1991-10-02 1994-04-19 Gec Alsthom Sa Ultra-high-tension circuit-breaker
FR2687246A1 (fr) * 1992-02-07 1993-08-13 Alsthom Gec Parafoudre a oxyde de zinc a eclateur serie.
DE4204559A1 (de) * 1992-02-13 1993-08-19 Slamecka Ernst Verfahren zur schaltspannungsbegrenzung

Also Published As

Publication number Publication date
CN1055443A (zh) 1991-10-16
DE69110499T2 (de) 1995-11-09
US5170023A (en) 1992-12-08
CN1022959C (zh) 1993-12-01
CA2037119C (fr) 1996-07-23
EP0444568B1 (de) 1995-06-21
DE69110499D1 (de) 1995-07-27
BR9100768A (pt) 1991-10-29
CA2037119A1 (fr) 1991-08-28
FR2662848A2 (fr) 1991-12-06
ATE124167T1 (de) 1995-07-15
ES2074595T3 (es) 1995-09-16
JPH04230922A (ja) 1992-08-19
FR2662848B2 (fr) 1994-07-01

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