EP2377134B1 - High performance electric circuit breaker - Google Patents

High performance electric circuit breaker Download PDF

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Publication number
EP2377134B1
EP2377134B1 EP20100706763 EP10706763A EP2377134B1 EP 2377134 B1 EP2377134 B1 EP 2377134B1 EP 20100706763 EP20100706763 EP 20100706763 EP 10706763 A EP10706763 A EP 10706763A EP 2377134 B1 EP2377134 B1 EP 2377134B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
electric
movable portion
electric circuit
supporting element
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.)
Active
Application number
EP20100706763
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2377134A1 (en
Inventor
Fabrizio Fabrizi
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.)
BTicino SpA
Original Assignee
BTicino SpA
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 BTicino SpA filed Critical BTicino SpA
Publication of EP2377134A1 publication Critical patent/EP2377134A1/en
Application granted granted Critical
Publication of EP2377134B1 publication Critical patent/EP2377134B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening

Definitions

  • the present invention refers to the technical field of electric apparatuses, and more specifically to an electric circuit breaker as defined in the preamble of claim 1 as shown in JP-A-60003829 .
  • molded case electric circuit breakers are normally used, which comprise fixed and movable electric contacts, which are usually comprised of fixed and movable electrically conductive pads.
  • the fixed pads are provided on respective supporting elements, which are integral with the external insulating case of the circuit breaker, whereas the movable pads are provided on respective supporting elements, which are fixed to a contact carrying shaft.
  • Such shaft may be operated by means of a suitable actuating mechanism in order to bring the movable pads in the respective operating positions corresponding to the opening and closing states of the circuit breaker.
  • the movable pads in particular, these are not fixed to the contact carrying shaft but are supported in a way as to maintain a.
  • the aim is here to compensate inevitable misalignments between the fixed pads of the circuit breaker and/or clearances caused by wear of fixed and movable pads. In this way a proper contact between the fixed and movable pads of circuit breaker is thus achieved.
  • molded case circuit breakers having above said architecture have a rather low upper limit of electric current value for which a proper electric contact between fixed and movable pads of circuit breaker is ensured.
  • circuit breakers are not able to resist to high overcurrents induced by a failure in another portion of the electric network.
  • the fractioning of the supporting elements for the movable pads allows the distribution of current over a plurality of contract zones, therefore reducing the repulsion threshold for each individual movable pad.
  • the global effect on the single pole of the circuit breaker is therefore to rise the repulsion threshold of the whole group of movable pads.
  • the increase of number of supporting elements for movable pads entails on one side and an increase of size of circuit breaker and on the other side an increase of total force for each pole required for maintaining a proper pressure of movable pads on fixed pads.
  • An object of the present invention is to provide an electric circuit breaker which is able to solve above said drawbacks with reference to installations and circuit breakers of the known art.
  • an object of the present invention is to provide an electric circuit breaker which is characterized by such performance as to allow the fabrication of electric installations having high performance in terms of selectivity characteristics.
  • an object of the present invention is to provide an electric circuit breaker which allows an increase of the maximum current value, for which a proper contact between the respective electric contacts is ensured, without the need for an increase of force applied by the actuation mechanism of the circuit breaker.
  • the circuit breaker 1 is for example a so called molded case circuit breaker, which is adapted to be used in electric low voltage distribution installations.
  • the electric circuit breaker 1 is comprised, in a non limiting way, of an automatic three pole molded case circuit breaker.
  • the circuit breaker 1 has a circuit breaker body 3 comprising a box-shaped case 5, made of insulating material, which has a supporting function for internal mechanisms of circuit breaker.
  • the case 5 has a front side 7, from which an operating lever 9 protrudes, which is provided for operating the circuit breaker, and a rear side 11 provided with suitable fixing means, which are not shown, as they are known per se, for fixing the circuit breaker 1 to an electrical switchboard.
  • case 5 On the upper side 13, the case 5 is provided with input clamps, not shown, for connecting the circuit breaker 1 to cables of an electric installation.
  • Output clamps which are analogous to the input clamps, not shown, are provided on the lower side 15 of case 5.
  • the circuit breaker 1 comprises at least a first electric contact 20, which is fixed to a first supporting element 22 or first contact carrying support.
  • the first supporting element is fixed to the case 5 of the circuit breaker, by means of screws 22A.
  • the first supporting element 22 is made of copper or copper alloy, for example a copper-brass alloy.
  • the first electric contact 20 comprises a first plurality of electric contacts, in this example, four electric contacts.
  • such electric contacts are made in the shape of first electrically conductive pads 23.
  • such pads are sintered pads made of silver alloys.
  • the first contact carrying support 22 comprises a fixed portion 24 adapted to be fixed to the circuit breaker body 3 and which, in the present example, is an electric terminal. From now on, without introducing any limitation, the fixed portion will be also referred to as electric terminal 24.
  • the first contact carrying support 22 also comprises a movable portion 26 which is movably connected to the fixed portion 24. According to an embodiment, the movable portion 26 is rotatably constrained to the terminal 24.
  • the movable portion 26 is hinged to terminal 24. It is to be stressed out that the movable portion 26 is electrically connected to terminal 24. As is shown in fig. 2 , the first pads 23 are fixed, preferably welded, to the movable portion 26.
  • the movable portion 26 comprises a plurality of arms 28, four arms in this example, which are movably connected to the fixed portion 24.
  • each arm 28 is provided with a respective first pad 23.
  • each arm 28 comprises a connecting portion 28A ( fig. 4 ), which is adapted to be received in a respective connection recess 29 (for example, as shown in the embodiment of fig. 12a ) which is defined between a pair of walls 29A, 29B of terminal 24.
  • the terminal 24 has a comb-like end portion, including a plurality of connection recesses 29 defined between teeth of said comb.
  • the connection recesses 29 are produced by cutting, for example by milling and similar.
  • a second electric contact 30 of circuit breaker 1 is shown.
  • the second electric contact 30 is fixed to a second supporting element 32 or second contact carrying support.
  • the second electric contact 30 comprises a second plurality of electric contacts, four contacts in the example.
  • such electric contacts are made in the shape of second electrically conductive pads 33.
  • the second pads 33 are welded to the second contact carrying support 32.
  • the second contact carrying support 32 which is made of electrically conductive material, comprises a first electrically conductive body or first plate 35, to which the second pads 33 are fixed, and a second electrically conductive body or second plate 37, which is connected to the first plate by means of flexible electric conductors 39.
  • the second, pads 33 are able to assume a first operating position or closing operating position ( fig. 10 and 11 ) and a second operating position or opening operating position ( fig. 9 ).
  • the closing operating position the second pads 32 are abutting against the first pads 23 in order to set the circuit breaker 1 in a closing state.
  • the opening position on the contrary, the second pads 33 are set at a given distance from the first pads 23 in order to set the circuit breaker 1 in an opening state.
  • the circuit breaker 1 comprises moving means 40, 42, for allowing the second pads 33 to assume the closing and opening operating positions, respectively.
  • the moving means comprise a contact carrying shaft 40 ( fig. 6 ) and an actuation or operating mechanism 42 (partially visible for example in fig. 7 and 8 ) for actuating such shaft.
  • the contact carrying shaft 40 including the second contact carrying support 32, is adapted to be actuated by the actuation mechanism 42, in order to allow the second pads 33 to assume the closing ( fig. 10 ) and opening operating positions ( fig. 9 ).
  • fig. 1 shows a three pole circuit breaker, fig.
  • FIG. 7 and 8 illustratively show, as a non limiting example, a contact carrying shaft for a four pole circuit breaker, including in particular four second contact carrying supports 32.
  • a contact carrying shaft 40 of fig. 7 and 8 may easily modify the structure of contact carrying shaft 40 of fig. 7 and 8 , in order to adapt it to electric circuit breakers having any number of poles, i.e. any number of second contact carrying supports 32.
  • arms 28 of the first contact carrying support 22 are operatively interposed between the terminal 24 and second contact carrying support 32.
  • the circuit breaker 1 comprises electromagnetic shielding means.
  • the electromagnetic shielding means comprise at least a first electromagnetic shielding device 50 or first ferromagnetic shield, which is interposed between arms 28 and the second contact carrying support 32.
  • the circuit breaker 1 comprises a plurality of first ferromagnetic shields 50 (not shown), whose number is equal to the number of first contact carrying supports 22, i.e. to the number of poles of circuit breaker 1.
  • a first embodiment of the first ferromagnetic shield 50 is more clearly shown in figs. 2 and 3 .
  • the first shield 50 is generally shaped like a case suitable for embracing an end portion 52 of first contact carrying support 22.
  • the first ferromagnetic shield is advantageously shaped substantially like a case for enveloping the terminal 24 and movable portion 26.
  • the first shield 50 comprises at least a shielding wall 54 operatively directed towards the second contact carrying support 32.
  • this shielding wall 54 generally extends from first pads 23 approximately up to the connection portion 28A of arms 28 ( fig. 4 ).
  • a first embodiment for example shown in fig.
  • the first shield 50 comprises the shielding wall 54, a pair of mutually opposed lateral walls which are joined to the shielding wall and anchoring portions or anchoring tabs 58 which are joined to the pair of lateral walls and which are transversely positioned with respect to this pair of walls.
  • the anchoring portions in the example two anchoring tabs 58, are such as to cooperate with the terminal 24 in order to allow fixing of first shield 50 to first contact carrying support 22.
  • the anchoring tabs 58 are in particular such as to be coupled with a rear wall of terminal 24, i.e. the terminal wall which is opposed to the one directed towards the rear side of arms 28. According to the embodiment of fig.
  • the first shield 50 particularly comprises anchoring means for fixing the first shield to the first contact carrying support 22.
  • anchoring means may for example comprise holes (not shown) provided on anchoring tabs 58, through which suitable anchoring screws 59 may be inserted.
  • the first shield 50 is advantageously adapted to be removably coupled with the first contact carrying support 22.
  • the electromagnetic shielding means may comprise at least an additional electromagnetic shielding device or additional ferromagnetic shield 60 ( figs. 3 and 4 ), which is constrained to the movable portion 26.
  • the electromagnetic shielding means comprise a plurality of additional ferromagnetic shields 60.
  • additional shields 60 are shown, each fixed to a respective arm 28 of first contact carrying support 22.
  • each arm 28 has a front side, onto which the pads 23 are fixed and a rear side which is directed towards the terminal 24, the additional shields 60 laterally extend along the sides of each arm 28.
  • each of additional shields 60 comprise a respective apex portion 62, in the example having a hooked or curved shape, which is arranged near the second pad 23 of the respective arm.
  • the electromagnetic shielding means comprise at least a second electromagnetic shielding device 70 or second ferromagnetic shield ( fig. 9 ), which is interposed between the first shield 50 and second contact carrying support 32.
  • a plurality of second shields 70 is shown, in particular four shields, which are integral with the contact carrying shaft 40.
  • the second shields 70 each have a receiving seat 72 for a respective second contact carrying support 32.
  • second shields 70 are such as to embrace each an intermediate portion, which does not include the second pads 33, of a respective second contact carrying support 32.
  • each of second shields 70 comprises at least a respective shielding wall 74, which approximately extends from second pads 33 up to flexible electric conductors 39.
  • the first contact carrying support 22 comprises first elastic means 80 which are interposed between the arms 28 and terminal 24.
  • These fist elastic means in the example of fig. 2 comprising helical compression springs 82, are such as to act upon arms 28 in order to increase the contact pressure between the first 23 and second 33 pads when the second pads reach their losing operating position ( fig. 10 ).
  • the second pads 33 exert a pressure on the first pads, so that arms 28 are drawn towards the terminal 24, against the action of helical compression springs 82.
  • the excursion of arms 28 is sufficient, for example, to compensate the misalignment and/or wear of first 23 and second 33 pads, ensuring a proper contact between the same pads.
  • the compression of helical compression springs 82 allows to provide a required contact force.
  • a flow of electric current is schematically shown, which is able to cross the first 22 and second 32 contact carrying support, in the operating conditions of circuit breaker 1.
  • the terminal 24 is such as to be crossed by a flow of electric current I 1 in a set orientation
  • the arms 28 are such as to be operatively crossed by a flow of electric current I 2 , having a substantially opposed orientation and in this example an essentially parallel direction, with respect to those of the flow of current I 1 crossing the terminal 24.
  • the interaction between the current flows I 1 , I 2 gives rise to a repulsive electromagnetic force F (schematically shown by an arrow in fig. 11 ) which is able to distance the arms 28 from the terminal 24, therefore facilitating a contact pressure increase between the first 23 and second 33 pads.
  • F repulsive electromagnetic force
  • the second contact carrying support 32 is such as to be operatively crossed by a flow of electric current I 3 having a substantially opposed orientation and in the example an essentially parallel direction with respect to those of the flow of current I 2 crossing arms 28.
  • the additional shields 60 may help generate a positive effect with reference to maintaining the contact between first 23 and second 33 pads.
  • the additional shields 60 are such as to electromagnetically cooperate with the first shield 50 by being attracted or drawn towards this shield. More in particular, the additional shields may interact with the first shield 50 in a way as to substantially create an electromagnet/armature couple, wherein the first shield 50 is the electromagnet and the additional shields 60 are the armature. Therefore the generation of an electromagnetic force is enabled, which attracts the arms 28 towards the first shield 50 and which therefore helps maintaining the contact between first 23 and second 33 pads.
  • a circuit breaker according to the invention it is possible, for the same push exerted by the actuation mechanism, to sensibly raise, with respect to circuit breakers of the known art, the threshold value of electric current at which the separation of first 23 and second 33 pads of circuit breaker occurs.
  • a circuit breaker according to the present invention has characteristics in terms of selectivity which are very improved with respect to the present market offerings, even ensuring a proper contact between pads of the circuit breaker up to 40 [kA] and beyond.
  • circuit breaker according to the invention it is therefore possible to fully comply with the selectivity requirements of a modern electric distribution installation, by employing a circuit breaker of decidedly lower size and- cost, with respect, for example, to present air circuit breakers.
  • the particular structure of the first ferromagnetic shield which is essentially shaped like a case suitable for embracing the fixed portion and the movable portion 26 of the first contact carrying support, beside allowing an optimal electromagnetic shielding of the first contact carrying support, advantageously simplifies the assembling of the assembly comprising the first contact carrying support and the first electromagnetic shield, as well as the installation of this assembly into the respective mounting housing, which is provided inside the circuit breaker.
  • first ferromagnetic shield gives rise to a multifunctional ferromagnetic shield, which, besides being particularly efficient in providing the respective electromagnetic shielding, allows to maintain a predefined distance between the first and second pads of the circuit breaker, when the second pads are set in the opening position. In particular, this allows to obtain a particularly efficient structure of the assembly comprising the first shield and the first contact carrying support, and therefore of the circuit breaker.
  • circuit breaker 1 may comprise means for improving the electric conductibility between the terminal 24 and arms 28.
  • Such means are in particular interposed between the terminal and the same arms.
  • the means for improving the electric conductibility may comprise an electric conductive hinge pin 100 for hinging the terminal 24 and arms 28.
  • the pin 100 may be made of high electric conductive materials, such as, preferably but not in a limiting way, copper with a silver lining.
  • the hinge pin 100 comprises a plurality of hinge pins 102, which are aligned along the same hinge axis X.
  • the hinge pin 100 may be subdivided into a plurality of shorter hinge pins 102, for hinging, as an example, a respective arm 28. In this way, it is advantageously possible to increase the total number of contact zones between the hinge pin 100 and terminal 24 with respect to the case where only one hinge pin 100 is used.
  • the means for improving the electric conductibility may comprise, additionally or alternatively to what previously and subsequently described and shown, second elastic means suitable for engaging arms 28, for increasing the contact pressure between said arms and terminal 24.
  • the second elastic means comprise at least one belleville spring 104, which is interposed between each arm 28 and the walls 29A, 29B which define the respective connection recess 29. More particularly, in this embodiment, for example, a belleville spring 104 is provided, which is positioned between the connection portion 28A of each arm 28 and one of walls 29A, 29B of the respective connection recess 29.
  • a belleville spring 104 is provided, which is positioned between the connection portion 28A of each arm 28 and one of walls 29A, 29B of the respective connection recess 29.
  • the terminal 24 may comprise widened connection recesses 29, each being such as to receive the connection portions 28A of a pair of arms 29.
  • one pair of belleville springs 104 is provided between two arms 28 received in the respective widened connection recess 29.
  • the means for improving the electric conductibility may comprise at least one flexible conductive element (not shown), which is connected to terminal 24 and arms 28, respectively.
  • the first elastic means 80 may comprise springs of different type with respect to helical compression springs 82 ( fig. 2 ).
  • helical compression springs 82 fig. 2
  • leaf springs 110 preferably one for each arm 28, is shown.
  • the first elastic means 80 may comprise traction springs instead of compression springs.
  • traction springs instead of compression springs.
  • the use of an helical tension spring 112 is shown.
  • such a spring 112 has an end connected to a hooking pin 114 of terminal 24 and an opposed end which is connected to arms 28.
  • the first contact carrying support 22 advantageously comprises electric insulating means interposed between the arms 28 and terminal 24.
  • electric insulating means 120, 122 are shown, which are interposed between the arms 28 and first elastic means 80, in order to avoid that these elastic ' means are electrified and may therefore be damaged due to overheating.
  • the first contact carrying support 22 comprises means for mutually approaching the electric current flows I 1 , I 2 which flow through the terminal 24 and arms 28, respectively.
  • the means for mutually approaching the electric current flows comprise a reduced thickness portion 130 ( fig. 17 ) of terminal 24.
  • the reduced thickness portion 130 may for example be provided by means of a groove 132 which is provided on the terminal 24 on the side opposite to arms 28.
  • two embodiments of the first contact carrying support 22 are shown, with and without the reduced thickness portion 130, respectively.
  • arrows schematically indicate the current flows I 1 , I 2 , flowing through the terminal 24 and arms 29 as well as the repulsive electromagnetic force F generated between such elements.
  • the intensity of the repulsive electromagnetic force F is directly proportional to the number of respective arrows. Comparing fig. 16 and 17 , it may be seen that the electric current I 1 flowing through the terminal 24, due to the reduced thickness portion 130, is forced towards the electric current I 2 flowing through the arms 28, so that an increase of the electromagnetic repulsive force F between the terminal 24 and arms 28 is achieved.
  • the first contact carrying support 22 comprises fast coupling means, for removably coupling, even without the use of tools, the first ferromagnetic shield 50 to the first contact carrying support 22.
  • the fast coupling means comprise a fast engagement recess 140 provided on the terminal 24.
  • the anchoring tabs 58 of the first shield are received inside the fast engagement recess 140. More particularly, in this condition, the first shield 50 remains firmly connected to the first contact carrying support, due to the pressure exerted on this shield by arms 28 by means of the first elastic means 80.
  • the conformation of the installation seat inhibits the first shield 50 from disengaging from the first contact carrying support 22, when arms 28 are not contacting this shield.
  • the first contact carrying support 22 is shown, which is particularly suited for low voltage electric circuit breaker.
  • the walls 29A, 29B which define the connection recess 29 may in fact be provided by bending of two portions 150 of terminal 24, instead of machining, as such as cutting.

Landscapes

  • Breakers (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Organic Insulating Materials (AREA)
EP20100706763 2009-01-12 2010-01-12 High performance electric circuit breaker Active EP2377134B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM2009A000009A IT1392729B1 (it) 2009-01-12 2009-01-12 Interruttore elettrico ad elevate prestazioni
PCT/IT2010/000004 WO2010079524A1 (en) 2009-01-12 2010-01-12 High performance electric circuit breaker

Publications (2)

Publication Number Publication Date
EP2377134A1 EP2377134A1 (en) 2011-10-19
EP2377134B1 true EP2377134B1 (en) 2014-11-12

Family

ID=40933645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100706763 Active EP2377134B1 (en) 2009-01-12 2010-01-12 High performance electric circuit breaker

Country Status (7)

Country Link
EP (1) EP2377134B1 (it)
CN (1) CN102272873B (it)
CO (1) CO6341679A2 (it)
IT (1) IT1392729B1 (it)
MX (1) MX2011006923A (it)
RU (1) RU2486621C2 (it)
WO (1) WO2010079524A1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107170651B (zh) * 2016-03-07 2019-09-06 浙江正泰电器股份有限公司 断路器的转轴装置
CN109285732B (zh) * 2018-11-30 2024-02-13 武汉长海电气科技开发有限公司 直流接触器及其触头结构

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1268047A (fr) * 1960-08-12 1961-07-28 Elektro App Werke Veb Dispositif électrodynamique servant à l'actionnement des éléments de commutation d'un interrupteur électrique, notamment d'un disjoncteur
GB1451958A (en) * 1973-05-03 1976-10-06 Mte Components Lt Electrical switches
DE2615726A1 (de) * 1976-04-10 1977-10-27 Bbc Brown Boveri & Cie Kontaktanordnung
SU974440A1 (ru) * 1980-10-04 1982-11-15 Ленинградский Ордена Ленина Политехнический Институт Им.М.И.Калинина Высоковольтный электрический аппарат
JPS603829A (ja) * 1983-06-21 1985-01-10 富士電機株式会社 回路しや断器
SU1439688A1 (ru) * 1987-04-24 1988-11-23 В.В„Кли.мов Разъединитель
EP1207544B1 (de) * 2000-11-17 2006-06-14 ABB Schweiz AG Kontaktzone für einen Leistungsschalter
RU27971U1 (ru) * 2002-09-04 2003-02-27 Открытое акционерное общество "Электроавтомат" Автоматический выключатель

Also Published As

Publication number Publication date
CN102272873A (zh) 2011-12-07
RU2486621C2 (ru) 2013-06-27
CO6341679A2 (es) 2011-11-21
CN102272873B (zh) 2014-03-05
WO2010079524A1 (en) 2010-07-15
EP2377134A1 (en) 2011-10-19
MX2011006923A (es) 2011-07-29
RU2011133817A (ru) 2013-02-20
ITRM20090009A1 (it) 2010-07-13
IT1392729B1 (it) 2012-03-16

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