EP1870916B1 - Actionnement par came cylindrique d'un disjoncteur sectionneur d'alternateur - Google Patents

Actionnement par came cylindrique d'un disjoncteur sectionneur d'alternateur Download PDF

Info

Publication number: EP1870916B1
Authority: EP; European Patent Office
Prior art keywords: switch; circuit; breaker according; contacts; cylinder
Prior art date: 2006-06-23
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.): Not-in-force

Application number

EP07110719A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP1870916A1 (fr

Inventor

Denis Frigiere

Xavier Allaire

Nicolas Chevillot

Jean-Marc Willieme

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

Areva T&D SAS

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.)

2006-06-23

Filing date

2007-06-21

Publication date

2010-11-17

2007-06-21 Application filed by Areva T&D SAS filed Critical Areva T&D SAS

2007-12-26 Publication of EP1870916A1 publication Critical patent/EP1870916A1/fr

2010-11-17 Application granted granted Critical

2010-11-17 Publication of EP1870916B1 publication Critical patent/EP1870916B1/fr

Status Not-in-force legal-status Critical Current

2027-06-21 Anticipated expiration legal-status Critical

Images

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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric

Definitions

the invention relates to the field of electrical equipment equipping the energy evacuation devices of generators in power generation plants.
the invention relates to the actuation of the different breaking elements so that the alternator circuit breakers are of simpler structure.
the invention relates to an alternator circuit breaker coupled to a disconnector in which the different relative movements between contacts are made by means of a cylindrical cam to optimize the synchronization and the speed of separation between the contacts, while maintaining the compactness of the circuit breaker.
a safety option is to have a circuit breaker to isolate the circuit before the transformer connected to a power line.
This type of switchgear under a voltage of the order of 15 kV to 36 kV, then performs the functions of passing strong permanent current (of the order of several thousand amperes) and breaking high fault current. (of the order of tens of thousands of amperes), while isolating the circuit.
the cut is performed in two stages by two switches in parallel, one permitting the passage of permanent nominal current and the other ensuring the breaking of the current of short circuit, thus defining a "main circuit” and an "auxiliary circuit".
the main circuit switch contacts for these alternator circuit breakers are large enough to withstand high nominal currents without overheating, and they define a relatively large volume.
the cut-off switch conventionally comprises a bulb of reduced dimensions, disposed inside this volume and comprising movable arcing contacts relative to each other, which in fact only support the breaking current of the breaker.
the main contacts first deviate and travel a sufficient distance before the current switches on the arcing contacts, which then open and cause the interruption of the current.
the alternator circuit breaker is associated with a disconnector, which has no breaking capacity: it opens only when the circuit breaker is open and therefore when the current no longer passes through the circuit. It is known that the disconnector can be integrated in the circuit breaker central disconnector described for example in EP 0 877 405 .
the object of the invention is to make the alternator circuit breakers more compact and simple to implement thanks to a new, single-controlled actuation system.
the invention relates in one of its aspects to an alternator disconnect circuit breaker comprising a switching switch in parallel with a breaking switch, for example a vacuum chamber; each of the switches comprises a pair of movable contacts in translation relative to each other along a respective axis, thanks to actuating means.
the circuit breaker further comprises a section switch, advantageously in series with the cutoff switch, which comprises a pair of movable contacts relative to each other, advantageously in translation, by means of actuating means.
the three axes of displacement of the contacts are merged.
only one contact of each pair is mobile, the other is fixed.
the actuating means of one or more of the switches can be coupled to the corresponding contact via a connecting rod, to allow a certain distance between the contacts.
the circuit breaker furthermore comprises synchronization means making it possible, during a break, to separate successively and in this order the contacts of the switching switch, then of the breaking switch and then of the disconnector; the synchronization means also make it possible to successively close the contacts in the reverse order. Closing the cut-off switch, particularly if it is a vacuum interrupter, at the end of the opening maneuver can be provided.
the synchronization means are coupled to the actuating means and allow, by a single command, the implementation of each of the interrupts.
the actuating and synchronizing means of at least the first and second switches comprise a cylindrical cam, that is to say a cylinder provided with lights cooperating with sliding elements for actuating the contacts.
the cylinder also actuates the disconnector.
the cylinder is rotated by a suitable system, for example a transmission chain or a set of rods operated by lever.
the actuating and synchronizing lights comprise a helical part, whose winding direction depends on the direction of translation of the contact concerned, and whose slope depends on the relative separation speed of the contacts.
the helical portions of the lights are shifted relative to each other by the presence of portions of zero slope (i.e., extending around the cylinder orthogonal to the axis) or weak.
the movable contact of at least one switch, or preferably of all the switches to be actuated via a plurality of sliding elements distributed around its periphery, for example two diametrically opposed elements; these sliding elements can be coupled to the contact via rods whose one end is fixed to the contact and the other door the sliding element.
Each sliding element cooperates with a corresponding light of the cylinder, the lights allowing the actuation of a single contact being of similar profile but offset on the periphery of the cylinder.
rods between sliding element and contact are present, it is preferred that the plurality of actuating rods of the same contact is coupled together by means of a part ensuring their geometric positions, for example a bar.
the actuating means are guided in translation by the presence of lugs cooperating with rectilinear grooves located on the casing of the circuit breaker.
the sliding elements are extended perpendicularly to the axis of movement by these lugs.
the figure 1 schematically illustrates the principle of breaking a circuit breaker according to the invention.
FIGS. 2A and 2B show a preferred embodiment of the circuit breaker according to the invention, in fully open and fully closed positions.
FIGS. 3A and 3B schematically illustrate two elements forming part of actuating means and synchronization according to the invention.
FIG. figure 1 The operating principle of a circuit breaker, and in particular of an alternator circuit breaker 1 according to the invention, is shown schematically in FIG. figure 1 , with a main circuit in which a current I 0 near the nominal current I flows in operation, and an auxiliary circuit biased for the short-circuit cutoff.
the passage of a current I with a rated current greater than several thousand amperes requires the use on the main circuit of a switch 10 whose contacts are particularly conductive, for example copper ; their breaking capacity is however limited because of the generation of electric arcs.
a second switch 20 is connected in parallel with the first 10 in order to perform the actual cutoff function, the opening of the first switch 10 actually switching the current I of the main circuit on this auxiliary circuit; the contacts of this second switch 20, for example tungsten, are of limited performance with respect to the passage of the rated current I, but have a high breaking capacity.
the functions of transmission of the permanent current and short circuit break are separated: in case of bias, the first switch 10 is first activated, the current I then completely passes through the auxiliary circuit and causes the opening the second switch 20 to obtain the cutoff function.
a third switch 30 is then open: its function is mainly a safety function, its association on the auxiliary circuit to avoid a drop dielectric strength of the second switch 20 which could accidentally allow the passage of current in the associated branch.
the disconnector 30 is first closed, then the cut-off switch 20, and finally the first switch 10.
Each of the switches 10, 20, 30 comprises a pair of movable contacts with respect to each other; advantageously, the first contact 12, 22, 32 of each pair is fixed, and the second contact 14, 24, 34 is movable relative to the first.
the first switch 10 may be of the gas type; it can also, especially if the nominal current is very high, itself be a switching device comprising two switches in parallel with each other.
the first switch 10 is an air switch comprising a first fixed tubular contact 12 about an axis AA in which can be inserted a second tubular contact 14 as well.
the second switch 20 may be a gas circuit breaker SF 6 type; preferably, since the current I - I 0 passing through it is weak in normal operation, it is a vacuum interrupter: this makes it possible to avoid the use of hexafluoride sulfur, which increases ecological performance and reduces costs.
the third switch 30 may comprise a fixed contact 32 in which can be inserted another movable contact 34 along the axis AA of opening / closing, the rod type.
the first and second switches 10, 20 are coaxial: this coaxiality of the electrical circuits is favorable for switching the current of the main circuit to the secondary circuit; the contacts of the two switches thus extend in the same longitudinal direction and are displaced in translation parallel to this direction AA.
the contacts of the third switch 30 also move in translation and the three axes along which move the contacts 14, 24, 34 are merged.
the pole operation of the isolating circuit-breaker 1 is such that the operation of the contacts of each switch 10, 20, 30 is preferably provided by a single control linked to the poles by a synchronization kinematics to ensure the sequence of operation.
each movable contact 14, 24, 34 is actuated via an actuating and synchronizing device using a rotary cam system located in an envelope 5 of the circuit breaker 1.
This solution makes it possible to determine the movement of each switch 10, 20, 30 in a coaxial construction that promotes compactness; of easy and robust design during the time, the cam system 40 is located in the existing circuit breaker 1, without increasing its size.
the actuating and synchronizing means comprise a cylinder 40, preferably of revolution about the translation axis AA of the contacts 14, 24, 34 of the circuit breaker 1.
a first light 42 1 controls the opening and / or closing movement of the first main switch 10
a second light 42 2 controls the opening and / or closing of the second secondary switch 20
a third light 42 3 serves to actuate the section switch 30.
the drawing of the lights 42 allows the synchronization of the movements, as well as the determination of the speeds relative translation.
each of the switches is effected by means of an element 44 able to slide in the corresponding slot 42 of the cylinder 40 and fixedly secured to the contact. If the contact is remote from the cylinder 40, the sliding element 44 can be coupled to one end of a connecting rod 46 which is secured, by its other end, fixedly in contact; to allow a better readability, it is this last embodiment which is illustrated in figure 3A , but it should be understood that in the majority of cases and for reasons of compactness, connection rod 46 is absent and the sliding elements 44 are part of the contact to move.
the contact, the sliding elements 44 and / or the connecting rods 46 are located inside the rotary actuating and synchronizing cylinder 40: the profile of the slots 42 can thus be more accurate in view of the greater diameter of the 40 cylinder, which is also more robust.
the sliding element 44 itself is guided in translation, or the connecting rod 46 is guided longitudinally.
the guiding is carried out by cooperation between a lug 48 secured to the sliding element 44 and / or the rod 46 and a groove 50 parallel to the axis of translation AA of the contact, for example located on the casing 5 of the
the sliding element 44 in the lumen 42 of the cylinder 40 can be extended outwards by a lug 48 sliding in a groove 50 of the casing 5.
the actuating and synchronizing lights are designed to control the speed and timing characteristics between the movement of each of the switches 10, 20, 30.
the cylinder 40 is located between the first and second contacts 14, 24 which move in opposite directions, the disconnector 30 being driven in a similar motion to the first switch 10.
a drawing of lights 42 is illustrated in figure 3B , in a rolled version of the cylinder 40.
the first light 42 1 of the cylinder 40 comprises an initial end portion 42 1i which is helical in a first direction: upon actuation R of the cylinder 40, the first contact 14 of the first switch 10 is biased in translation for separation in order to to cut off the current as quickly as possible.
the slope of the first light 42 1 depends on the relative speed T to be obtained as a function of the speed of rotation R printed on the cylinder 40 by its control means 52.
the first light 42 1 comprises a final end portion 42 1f which is rectilinear, normal to the axis AA. It is also possible to provide a slower translation by a change of slope, or a reversal of movement ...
the second light 42 2 comprises an initial end portion 42 2i that is not sloping but linear along a perimeter of the wall: for a first time after the actuation, the second switch 20 is not requested. ; on the contrary, it remains closed so that the current flows from the main circuit to the auxiliary circuit. Thanks to drawing of the initial end portion 42 2i of the second light, the rotation of the cylinder 40 does not initially cause any translation of the sliding element 44 and thus the second contact 24.
the second light 42 2 is extended by a helical median portion 42 2m , whose slope depends the relative speed of opening of the switch 20.
the winding direction of the second light 42 2m is opposite that of the initial end portion 42 1i of the first light, the two contacts 14, 24 moving in the opposite direction; this is only illustrative.
the length of the initial end portion of the second lumen 42 2i depends on the latency time before the actuation of the second switch 20; preferably, the arc covered by the second initial end portion 42 2i is smaller than that covered by the first initial end portion 42 1i , a sufficient opening of the main switch 10 being just defined to allow the opening of the vacuum ampoule 20 without risk of priming. Moreover, in view of the dimensions in the case of a vacuum bulb 20, it is noted that the length of the middle portion 42 2m of the light is very small, the separation distance of the contacts 22, 24 being restricted.
the third light 42 3 comprises a linear initial end portion 42 3i longer than the initial end portion 42 2i of the second light and the middle portion 42 2m of this second light, determined to be greater than the corresponding distance at maximum arc time; it is possible, of course, to print a "slow" translation movement instead.
a helical winding of the third light 42 3f is then provided, in the winding direction of the first light 42 2i for this embodiment where the disconnector 30 and the first switch 10 operate "in the same direction” even if the opposite would be the case. possible.
the end end portion 42f of the second lumen is linear and that the contacts 22, 24 do not move (at least for a while) once the opening is reached.
the control means can be simplified, and the rotational animation of the cylindrical cam 40 can be performed by any system 52 adapted, for example by insulating rods mounted on a lever, or by a system of drive chains.
cam control and synchronization may be selected to operate the first two switches 10, only if, for example, a "knife" disconnector 30 is selected.
each sliding element 44, 44 ' in order to balance the forces on a contact, two sliding elements 44, 44 'are fixed therein diametrically opposite, and slide in a corresponding light of the cylinder 40: the cylinder then has a pair of first, respectively second and / or third , lights 42, 42 ', each light of the pair being identical and shifted 180 ° with the other.
each sliding element 44, 44 ' has a lug 48, 48' for guiding in an opposite groove 50, 50 'of the casing 5 of the circuit breaker 1.
each sliding element 44, 44 ' can be connected to the contact by via a rod 46, 46 '.
the ends of the rods 46, 46 ' which comprise the sliding elements 44, 44' are connected together, inside the cylinder 40, by an orthogonal bar 54 ensuring their spacing and their holding in position in order to limit the efforts.
Each of the switches preferably, or only some of them, may comprise two sliding elements. According to an advantageous embodiment, only one of the switches, for example the vacuum interrupter, is actuated by means of actuating rods, connected or not to each other by bars.
the cam actuation 40 furthermore makes it possible to maintain compactness at the circuit-breaker pole 1, the cylinder 40 taking place within the usual circuit-breaker 1.
the coaxiality of the circuits can therefore be maintained, even if it is possible, in particular in realizing an actuating rod 46 external to the cylinder 40, using a circuit breaker of intersecting axes as presented in the application EP 0 878 817 .

Landscapes

Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Mechanisms For Operating Contacts (AREA)
Arc-Extinguishing Devices That Are Switches (AREA)
Gas-Insulated Switchgears (AREA)
Circuit Breakers (AREA)

EP07110719A 2006-06-23 2007-06-21 Actionnement par came cylindrique d'un disjoncteur sectionneur d'alternateur Not-in-force EP1870916B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR0652628A FR2902923B1 (fr)	2006-06-23	2006-06-23	Actionnement par came cylindrique d'un disjoncteur sectionneur d'alternateur

Publications (2)

Publication Number	Publication Date
EP1870916A1 EP1870916A1 (fr)	2007-12-26
EP1870916B1 true EP1870916B1 (fr)	2010-11-17

Family

ID=37680735

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP07110719A Not-in-force EP1870916B1 (fr)	2006-06-23	2007-06-21	Actionnement par came cylindrique d'un disjoncteur sectionneur d'alternateur

Country Status (7)

Country	Link
US (1)	US7718913B2 (zh)
EP (1)	EP1870916B1 (zh)
JP (1)	JP5236902B2 (zh)
CN (1)	CN101097808B (zh)
AT (1)	ATE488852T1 (zh)
DE (1)	DE602007010540D1 (zh)
FR (1)	FR2902923B1 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2921198B1 (fr)	2007-09-17	2010-03-12	Areva T & D Sa	Actionnement par un ensemble d'arbre principal et d'arbres secondaires d'un disjoncteur sectionneur d'alternateur
US9228785B2 (en) *	2010-05-04	2016-01-05	Alexander Poltorak	Fractal heat transfer device
FR2985081B1 (fr)	2011-12-21	2015-03-06	Alstom Technology Ltd	Dispositif de protection contre les particules engendrees par un arc electrique de commutation
FR2996352B1 (fr)	2012-10-02	2014-10-31	Alstom Technology Ltd	Dispositif de contact electrique de type doigt de contact a fort courant nominal
FR2999331B1 (fr) *	2012-12-12	2019-05-31	Alstom Technology Ltd	Appareillage de coupure de courant ameliore
JP5920282B2 (ja) *	2013-05-08	2016-05-18	大日本印刷株式会社	色素増感型太陽電池素子モジュール
US10014139B2 (en) *	2015-09-02	2018-07-03	General Electric Company	Over-current protection assembly
CN111354594B (zh) *	2020-03-16	2022-03-25	大航有能电气有限公司	一种快速合分闸的成套断路器
CN114050081B (zh) *	2021-11-11	2024-02-13	许昌许继软件技术有限公司	一种隔离开关
CN114613639B (zh) *	2022-03-24	2023-08-15	西安西电开关电气有限公司	一种开关的传动系统

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DE893684C (de) *	1939-10-11	1953-10-19	Sachsenwerk Licht & Kraft Ag	Antriebsvorrichtung fuer Hochspannungsunterbrecher
JPS5214976U (zh) *	1975-07-18	1977-02-02
JPS54183671U (zh) *	1978-06-16	1979-12-26
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DE3611270C2 (de) *	1986-04-04	1995-08-17	Sachsenwerk Ag	Elektrische Schalteinrichtung für hohe Schaltspannungen
FR2738389B1 (fr)	1995-08-31	1997-10-24	Schneider Electric Sa	Disjoncteur hybrique a haute tension
FR2745947B1 (fr) *	1996-03-11	1998-04-10	Gec Alsthom T & D Sa	Disjoncteur a autocompression reduite
FR2763171B1 (fr)	1997-05-07	1999-07-09	Gec Alsthom T & D Sa	Disjoncteur avec sectionneur
FR2763422B1 (fr)	1997-05-15	1999-07-09	Gec Alsthom T & D Sa	Disjoncteur de generateur
FR2770678B1 (fr)	1997-10-30	1999-12-31	Gec Alsthom T & D Sa	Disjoncteur de generateur a commande mecanique unique
JP2000243192A (ja) *	1999-02-16	2000-09-08	Takaoka Electric Mfg Co Ltd	開閉装置
JP3799924B2 (ja) *	2000-01-11	2006-07-19	株式会社日立製作所	電力用遮断器および発電所電気回路装置
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AU763276B2 (en) *	2001-02-07	2003-07-17	Hitachi Limited	Gas insulated switchgear
FR2826503B1 (fr) *	2001-06-25	2003-09-05	Alstom	Chambre de coupure avec ampoule a vide
CN2504754Y (zh) *	2001-10-18	2002-08-07	王卫东	一种塑壳式剩余电流保护器
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2006
- 2006-06-23 FR FR0652628A patent/FR2902923B1/fr not_active Expired - Fee Related
2007
- 2007-06-21 EP EP07110719A patent/EP1870916B1/fr not_active Not-in-force
- 2007-06-21 DE DE602007010540T patent/DE602007010540D1/de active Active
- 2007-06-21 US US11/820,829 patent/US7718913B2/en not_active Expired - Fee Related
- 2007-06-21 AT AT07110719T patent/ATE488852T1/de not_active IP Right Cessation
- 2007-06-22 CN CN2007101120481A patent/CN101097808B/zh not_active Expired - Fee Related
- 2007-06-22 JP JP2007165657A patent/JP5236902B2/ja not_active Expired - Fee Related

Also Published As

Publication number	Publication date
ATE488852T1 (de)	2010-12-15
FR2902923A1 (fr)	2007-12-28
EP1870916A1 (fr)	2007-12-26
US20080011591A1 (en)	2008-01-17
JP2008004553A (ja)	2008-01-10
JP5236902B2 (ja)	2013-07-17
US7718913B2 (en)	2010-05-18
CN101097808A (zh)	2008-01-02
CN101097808B (zh)	2012-03-21
FR2902923B1 (fr)	2008-09-19
DE602007010540D1 (de)	2010-12-30

Publication	Publication Date	Title
EP1870916B1 (fr)	2010-11-17	Actionnement par came cylindrique d'un disjoncteur sectionneur d'alternateur
EP1974363B1 (fr)	2012-05-30	Disjoncteur sectionneur d'alternateur de structure compacte
EP2575155B1 (fr)	2019-09-04	Appareillage de distribution électrique moyenne tension
EP1855300B1 (fr)	2015-08-19	Disjoncteur sectionneur d'altenateur actionne par un servo-moteur
EP1974362B1 (fr)	2012-05-02	Disjoncteur de générateur avec résistance insérée
EP1583124B1 (fr)	2010-06-30	Disjoncteur hybride à haute tension
FR3072826B1 (fr)	2019-11-08	Appareil de coupure electrique, procede et installation utilisant un tel appareil
FR2962252A1 (fr)	2012-01-06	Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre reduite
EP0693763B1 (fr)	2000-04-26	Interrupteurs électriques moyenne tension
EP1906425B1 (fr)	2009-07-01	Actionnement par came cylindrique des contacts d'une chambre de coupure à double mouvement
EP2510530B1 (fr)	2014-04-16	Disjoncteur a haute tension a ecran amovible pour l'amelioration du gradient de champ
EP3073504B1 (fr)	2018-11-07	Interrupteur d'un reseau triphase
EP3699942B1 (fr)	2021-06-16	Système d'actionnement pour une ampoule à vide
EP0647955A1 (fr)	1995-04-12	Disjoncteur à haute tension capable de couper des courants de défaut à passage par zéro retardé
EP2402970B1 (fr)	2018-03-21	Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manoeuvre et dimensions reduites
FR2944911A1 (fr)	2010-10-29	Interrupteur-sectionneur electrique rotatif de moyenne et haute tension a resistance
EP3226276B1 (fr)	2021-03-10	Sectionneur adapté aux moyennes et hautes tensions et méthode de déconnexion au moyen dudit sectionneur
EP2945176B1 (fr)	2016-09-14	Appareillage de coupure électrique moyenne tension utilisant la technique de coupure dans le vide
CA2083295A1 (fr)	1993-05-21	Disjoncteur hybride pour la coupure des courants a grande composante continue
FR3060195A1 (fr)	2018-06-15	Appareil de connexion electrique a derivation de coupure d'arc, et procede d'ouverture de cet appareil
EP3226274A1 (fr)	2017-10-04	Sectionneur à division d'arc adapté aux moyennes et hautes tensions et méthode de déconnexion au moyen dudit sectionneur
FR2978290A1 (fr)	2013-01-25	Sectionneur pour une installation a isolation gazeuse comportant une ampoule a vide

Legal Events

Date	Code	Title	Description
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2009-11-18	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: AREVA T&D SAS
2009-12-02	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: AREVA T&D SAS
2010-05-26	RTI1	Title (correction)	Free format text: CYLINDRICAL SLOT GUIDE ACTIVATION OF A LOAD-BREAK DISCONNECTOR SWITCH
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