EP2249359B1 - Medium voltage line switch contact arrangement. - Google Patents
Medium voltage line switch contact arrangement. Download PDFInfo
- Publication number
- EP2249359B1 EP2249359B1 EP09159292.3A EP09159292A EP2249359B1 EP 2249359 B1 EP2249359 B1 EP 2249359B1 EP 09159292 A EP09159292 A EP 09159292A EP 2249359 B1 EP2249359 B1 EP 2249359B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- segment
- contact
- segments
- line switch
- medium voltage
- 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
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Classifications
-
- 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
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/42—Knife-and-clip contacts
-
- 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
- H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
- H01H33/121—Load break switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/36—Metal parts
Definitions
- the present invention relates to a contact arrangement, in particular to a contact arrangement of a Medium Voltage line switch, having improved resistance to arcing phenomena.
- Medium Voltage is referred to applications in the range of between 1 and 52 kV.
- Medium Voltage line switch are well known in the art and usually comprises, for each phase a contact assembly having a fixed contact and a corresponding movable contact.
- An arc chamber provided with an arcing electrode, is also present in order to control the arcing phenomena and minimize the arcing effects occurring during opening/closing operations of the line switch.
- Various solutions have been proposed in order to minimize the arcing effects on the contacts, said solutions being directed to improve the design of the main contacts and/or of the arcing chamber and/or to increase the speed of opening/closing operations.
- Patent applications DE3820489A1 and EP1026710A2 disclose known examples of switch contact arrangements.
- the present invention is aimed at providing a Medium Voltage line switch contact arrangement in which the prearcing time is reduced.
- a further object of the present invention is to providing provide a Medium Voltage line switch contact arrangement in which the arc burns far away from the main contacts, thereby preventing or considerably reducing contact erosion.
- Still another object of the present invention is to provide a Medium Voltage line switch contact arrangement with reduced manufacturing and installation costs.
- the present invention relates to a Medium Voltage line switch contact arrangement according to the following claim 1 and the related claims.
- the width L of the flat body is measured along the perpendicular line drawn from the connection point between said first and second segment to the fourth segment.
- a Medium Voltage line switch comprising a contact arrangement as described above is also part of the present invention.
- a Medium Voltage line switch contact arrangement generally comprises a fixed contact 2 and a movable contact assembly 3 which can be operatively connected to and disconnected from said fixed contact 2.
- the movable contact assembly 3 normally comprises a first 31 and a second 32 substantially flat blades which are arranged parallel to each other and at a distance from each other.
- the flat blades 31, 32 are pivotally mounted on a support (not shown) in correspondence of a pivot point 35. By rotation around the pivot point 35, the flat blades 31 and 32 can be connected to and disconnected from the fixed contact 2.
- the fixed contact 2 comprises contact element having a substantially flat body 20 having a first 21 and a second 22 contact surfaces which, in the closed position of the switch, interact with the inner surfaces of the flat blades 31 and 32 to close the circuit.
- the substantially flat body 20 is delimited by a base 23, which is electrically and mechanically connected to a contact holder 24, and by a first 25, a second 26, a third 27 and a fourth 28 segments so as to have a particular shape.
- the substantially flat body 20 is positioned so as to have the first 21 and the second 22 contact surface substantially parallel to the flat blades 31 and 32 of the movable contact assembly 3, with the first 25 and second 26 segments facing said movable contact assembly 3.
- the first segment 25 is substantially perpendicular to said third segment 27, with the second segment 26 connecting said first segment 25 to said third segment 27 and being inclined toward said fourth segment 28 so that the length l of the third segment 27 is shorter than the width L of said substantially flat body 20 as measured in correspondence of the connection point 29 between said first 25 and second 26 segment.
- the width L of the flat body 20 is considered as the distance between the connection point 29 and the fourth segment 28 as measured along the line drawn from the connection point 29 perpendicularly to the fourth segment 28, as shown in figure 4 .
- the prearcing time is reduced thereby greatly minimizing the erosion phenomena on the fixed contact.
- the length l of said third segment 27 is between 0.75L and 0.85L, and more preferably is between 0.77L and 0.83L.
- the base 23 of the substantially flat body 20 is substantially parallel to the third segment 27.
- the performances of the Medium Voltage line switch contact arrangement 1 of the invention can be further improved by properly dimensioning the length and inclination of the second segment 26.
- the distance d between the third segment 27 and the connection point 29 between the first 25 and the second 26 segments is preferably between 0.30D and 0.40D, where D is the length of the substantially flat body 20 as measured from the base 23 to the third segment 27.
- the distance d between said third segment 27 and the connection point 29 between the first 25 and the second 26 segments is between 0.33D and 0.38D.
- the distance d between said third segment 27 and the connection point 29 is considered as the distance between said connection point 29 and the third segment 27 as measured along the line drawn from the connection point 29 perpendicularly to the third segment 27.
- said first 25 and fourth 28 segments are substantially parallel to each other and substantially perpendicular to said third segment 27.
- the substantially flat body 20 has a substantially rectangular shape with a corner, i.e. the one facing the movable contact assembly 3, cut away.
- the length D of the substantially flat body 20 substantially corresponds to the length of the fourth segment 38, while the width L of the flat body 20 substantially corresponds to the distance between said substantially parallel first 25 and fourth 28 as measured along their perpendicular line.
- the corners between said second 26 and third 27 segments and between said third 27 and fourth 28 segments are rounded.
- the length l of the third segment 27 is considered as the distance between the points 81 and 82, i.e. the distance between the interception point 81 of the prolongation of the fourth 28 and third 27 segments and the interception point 82 of the prolongation of the second 26 and third 27 segments.
- Figure 4 shows how length l is measured in a particular embodiment of the invention.
- edges of said substantially flat body 20 defined by said first 25, second 26, third 27 and fourth 28 segments are rounded.
- said edges are preferably not constituted by flat surfaces perpendicularly connected to the contact surfaces 21 and 22, but they have at least a partially curved profile.
- the length l of said third segment 27 is between 0.77L and 0.83L
- the distance d between said third segment 27 and the connection point 29 between the first 25 and the second 26 segments is between 0.33D and 0.38D
- the first 25 and fourth 28 segments are substantially parallel to each other and substantially perpendicular to said third segment 27
- the corners between said second 26 and third 27 segments and between said third 27 and fourth 28 segments are rounded
- the edges of said substantially flat body 20 defined by said first 25, second 26, and third 27 segments are also rounded.
- the Medium Voltage line switch contact arrangement 1 of the invention usually also comprises an arc chamber 5.
- the arc chamber 5 comprises a supporting element 51 which is fixed to said fixed contact 2 and extends in the direction of the movable contact assembly 3.
- a hole can be provided in the flat body 20 of the fixed contact 2, the supporting element being fixed by fixing means (not shown in the figures), e.g. by screw means, to said hole.
- fixing means not shown in the figures
- Other fixing arrangement are also possible.
- the arc chamber 5 further comprising a plurality of plates 52 having a first end 53 operatively connected to said supporting element 51 and a second end 54 which is substantially U shaped and defines a passage for said first 31 and second 32 flat blades of said movable contact assembly 3.
- the U shaped end can be obtained by using two substantially parallel arms 541 and 542 protruding from the body of the plates 52.
- Other set-up of the arc chamber 5, which in itself is well known in the art, are also possible.
- the Medium Voltage line switch contact arrangement 1 of the invention comprises an arcing electrode 55 which is positioned on the supporting element 51 of the arc chamber 5.
- the arcing electrode 55 is preferably positioned in correspondence of the connection point 29 between said first 25 and second 26 segments and protrudes in the direction of said movable contact assembly 3, so as to be closely above the first 31 and second 32 flat blades of the movable contact assembly 3, when said blades 31 and 32 are in the proximity of the substantially flat body 20 of the fixed contact 2.
- the use of the arcing electrode 55 helps improving the performances of the Medium Voltage line switch contact arrangement 1 of the invention.
- inception of the arc does not occur on the fixed contact 2 but on the arcing electrode 55. Consequently the arc burns far away from the fixed contact, thereby avoiding or at least minimizing the problems of contact erosion due to the arc.
- the Medium Voltage line switch contact arrangement of the present invention has a number of advantages with respect to the Medium Voltage line switches equipped with conventional contact arrangements. For instance, thanks to the particular shape and positioning of the fixed contact, prearcing time is considerably reduced, thereby reducing also the erosion phenomena on the fixed contact.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Contacts (AREA)
Description
- The present invention relates to a contact arrangement, in particular to a contact arrangement of a Medium Voltage line switch, having improved resistance to arcing
phenomena. For the purposes of the present application the term Medium Voltage is referred to applications in the range of between 1 and 52 kV. - Medium Voltage line switch are well known in the art and usually comprises, for each phase a contact assembly having a fixed contact and a corresponding movable contact. An arc chamber, provided with an arcing electrode, is also present in order to control the arcing phenomena and minimize the arcing effects occurring during opening/closing operations of the line switch. Various solutions have been proposed in order to minimize the arcing effects on the contacts, said solutions being directed to improve the design of the main contacts and/or of the arcing chamber and/or to increase the speed of opening/closing operations.
- However, at the present state of the art, the design of the contact arrangement is not totally satisfactory. Indeed, erosion of the contacts, normally silver-plated cupper contacts, still occurs as a consequence of relatively long pre-arcing times and/or the location of the arc foot point in correspondence of the current-carrying contacts. This reduce the life of the apparatus and may also have negative consequences on the operation line switch.
- Patent applications
DE3820489A1 andEP1026710A2 disclose known examples of switch contact arrangements. - It is therefore an object of the present invention to provide a Medium Voltage line switch contact arrangement in which the above-mentioned drawbacks are avoided or at least reduced.
- More in particular, it is an object of the present invention to provide a Medium Voltage line switch contact arrangement in which contact erosion is reduced.
- As a further object, the present invention is aimed at providing a Medium Voltage line switch contact arrangement in which the prearcing time is reduced.
- A further object of the present invention is to providing provide a Medium Voltage line switch contact arrangement in which the arc burns far away from the main contacts, thereby preventing or considerably reducing contact erosion.
- Still another object of the present invention is to provide a Medium Voltage line switch contact arrangement with reduced manufacturing and installation costs.
- Thus, the present invention relates to a Medium Voltage line switch contact arrangement according to the following
claim 1 and the related claims. - It has been seen that, thanks to the particular design of the contact arrangement, in particular of the fixed contact, the prearcing time was considerably reduced. Consequently, also erosion of the contacts is considerably reduced.
- For the purpose of the present invention the width L of the flat body is measured along the perpendicular line drawn from the connection point between said first and second segment to the fourth segment.
- A Medium Voltage line switch comprising a contact arrangement as described above is also part of the present invention.
- Further characteristics and advantages of the invention will emerge from the description of preferred, but not exclusive embodiments of a Medium Voltage line switch contact arrangement according to the invention, non-limiting examples of which are provided in the attached drawings, wherein:
-
Figure 1 is a side view of a first embodiment of a line switch contact arrangement according to the invention; -
Figure 2 is front view of the line switch contact arrangement offigure 1 ; -
Figure 3 is a perspective view of a first embodiment of a fixed contact used in a line switch contact arrangement according to the invention; -
Figure 4 is a side view of the fixed contact offigure 3 ; -
Figure 5 is front view of the fixed contact offigure 3 ; -
Figure 6 is a perspective view of a second embodiment of a line switch contact arrangement according to the invention. - With reference to the attached figures, a Medium Voltage line switch contact arrangement according to the invention, globally designated with the
reference numeral 1, generally comprises afixed contact 2 and amovable contact assembly 3 which can be operatively connected to and disconnected from said fixedcontact 2. - The
movable contact assembly 3 normally comprises a first 31 and a second 32 substantially flat blades which are arranged parallel to each other and at a distance from each other. Theflat blades pivot point 35. By rotation around thepivot point 35, theflat blades contact 2. - The
fixed contact 2 comprises contact element having a substantiallyflat body 20 having a first 21 and a second 22 contact surfaces which, in the closed position of the switch, interact with the inner surfaces of theflat blades - The substantially
flat body 20 is delimited by abase 23, which is electrically and mechanically connected to acontact holder 24, and by a first 25, a second 26, a third 27 and a fourth 28 segments so as to have a particular shape. - In details, the substantially
flat body 20 is positioned so as to have the first 21 and the second 22 contact surface substantially parallel to theflat blades movable contact assembly 3, with the first 25 and second 26 segments facing saidmovable contact assembly 3. - For what concerns the shape of the substantially
flat body 20, thefirst segment 25 is substantially perpendicular to saidthird segment 27, with thesecond segment 26 connecting saidfirst segment 25 to saidthird segment 27 and being inclined toward saidfourth segment 28 so that the length l of thethird segment 27 is shorter than the width L of said substantiallyflat body 20 as measured in correspondence of theconnection point 29 between said first 25 and second 26 segment. - In other words, as shown in the attached figures, at least a portion of the substantially
flat body 20 of thefixed contact 2, in particular the portion facing themovable contact assembly 3, is cut away. - As already said, for the purpose of the present invention the width L of the
flat body 20 is considered as the distance between theconnection point 29 and thefourth segment 28 as measured along the line drawn from theconnection point 29 perpendicularly to thefourth segment 28, as shown infigure 4 . - Thanks to the particular shape of the
flat body 20 of the fixed contact and to its position with respect to themovable contact assembly 3, in particular with respect to the substantiallyflat contact blades switch contact arrangement 1 according to the invention, the length l of saidthird segment 27 is between 0.75L and 0.85L, and more preferably is between 0.77L and 0.83L. According to the invention, thebase 23 of the substantiallyflat body 20 is substantially parallel to thethird segment 27. - It has also been seen that the performances of the Medium Voltage line
switch contact arrangement 1 of the invention can be further improved by properly dimensioning the length and inclination of thesecond segment 26. In particular, according to the invention, the distance d between thethird segment 27 and theconnection point 29 between the first 25 and the second 26 segments is preferably between 0.30D and 0.40D, where D is the length of the substantiallyflat body 20 as measured from thebase 23 to thethird segment 27. - More preferably, the distance d between said
third segment 27 and theconnection point 29 between the first 25 and the second 26 segments is between 0.33D and 0.38D. - For the purposes of the present invention, and as shown in
figure 4 and5 , the distance d between saidthird segment 27 and theconnection point 29 is considered as the distance between saidconnection point 29 and thethird segment 27 as measured along the line drawn from theconnection point 29 perpendicularly to thethird segment 27. According to the invention, shown in the attached figures, said first 25 and fourth 28 segments are substantially parallel to each other and substantially perpendicular to saidthird segment 27. Thus, according to the invention the substantiallyflat body 20 has a substantially rectangular shape with a corner, i.e. the one facing themovable contact assembly 3, cut away. In this case, the length D of the substantiallyflat body 20 substantially corresponds to the length of the fourth segment 38, while the width L of theflat body 20 substantially corresponds to the distance between said substantially parallel first 25 and fourth 28 as measured along their perpendicular line. According to the invention, the corners between said second 26 and third 27 segments and between said third 27 and fourth 28 segments are rounded. In such a case, the length l of thethird segment 27 is considered as the distance between thepoints interception point 81 of the prolongation of the fourth 28 and third 27 segments and theinterception point 82 of the prolongation of the second 26 and third 27 segments.Figure 4 shows how length l is measured in a particular embodiment of the invention. - According to the invention, the edges of said substantially
flat body 20 defined by said first 25, second 26, third 27 and fourth 28 segments are rounded. In other words, said edges are preferably not constituted by flat surfaces perpendicularly connected to thecontact surfaces - In a particularly preferred embodiment of the invention, the length l of said
third segment 27 is between 0.77L and 0.83L, the distance d between saidthird segment 27 and theconnection point 29 between the first 25 and the second 26 segments is between 0.33D and 0.38D, the first 25 and fourth 28 segments are substantially parallel to each other and substantially perpendicular to saidthird segment 27, the corners between said second 26 and third 27 segments and between said third 27 and fourth 28 segments are rounded, the edges of said substantiallyflat body 20 defined by said first 25, second 26, and third 27 segments are also rounded. - The Medium Voltage line
switch contact arrangement 1 of the invention usually also comprises anarc chamber 5. Thearc chamber 5 comprises a supportingelement 51 which is fixed to saidfixed contact 2 and extends in the direction of themovable contact assembly 3. To this purpose a hole can be provided in theflat body 20 of the fixedcontact 2, the supporting element being fixed by fixing means (not shown in the figures), e.g. by screw means, to said hole. Other fixing arrangement are also possible. - The
arc chamber 5 further comprising a plurality ofplates 52 having afirst end 53 operatively connected to said supportingelement 51 and asecond end 54 which is substantially U shaped and defines a passage for said first 31 and second 32 flat blades of saidmovable contact assembly 3. As shown infigure 2 , the U shaped end can be obtained by using two substantiallyparallel arms plates 52. Other set-up of thearc chamber 5, which in itself is well known in the art, are also possible. - According to a particular embodiment, shown in
figure 6 , the Medium Voltage lineswitch contact arrangement 1 of the invention comprises anarcing electrode 55 which is positioned on the supportingelement 51 of thearc chamber 5. Thearcing electrode 55 is preferably positioned in correspondence of theconnection point 29 between said first 25 and second 26 segments and protrudes in the direction of saidmovable contact assembly 3, so as to be closely above the first 31 and second 32 flat blades of themovable contact assembly 3, when saidblades flat body 20 of thefixed contact 2. - It has been seen that the use of the
arcing electrode 55 helps improving the performances of the Medium Voltage lineswitch contact arrangement 1 of the invention. In particular, due to the presence of said arcingelectrode 55, inception of the arc does not occur on thefixed contact 2 but on thearcing electrode 55. Consequently the arc burns far away from the fixed contact, thereby avoiding or at least minimizing the problems of contact erosion due to the arc. - As it can be seen from the above description, the Medium Voltage line switch contact arrangement of the present invention has a number of advantages with respect to the Medium Voltage line switches equipped with conventional contact arrangements. For instance, thanks to the particular shape and positioning of the fixed contact, prearcing time is considerably reduced, thereby reducing also the erosion phenomena on the fixed contact.
- It is also possible to have inception of the arc not located on the main fixed contact, but on an additional arcing electrode properly positioned, thereby further reducing the problems of contact erosion of the fixed main contact.
- The Medium Voltage line switch contact arrangement thus conceived may undergo numerous modifications and come in several variants, all coming within the scope of the appended claims.
Claims (6)
- A Medium Voltage line switch contact arrangement (1) comprising a fixed contact (2) and a movable contact assembly (3) operatively connectable to said fixed contact (2), wherein the movable contact assembly (3) comprises a first (31) and a second (32) substantially flat blades parallel to each other, said flat blades (31, 32) being pivotally mounted on a support and rotationally connectable to said fixed contact (2);
wherein the fixed contact (2) comprises a contact element having a substantially flat body (20) having a rectangular shape with a corner cut away and first (21) and a second (22) contact surfaces delimited by a base (23) connected to a contact holder (24) and by a first (25), a second (26), a third (27) and a fourth (28) segments, wherein said first segment (25) is substantially perpendicular to said third segment (27),
wherein said second segment (26) faces said movable contact assembly (3) when said blades (31, 32) are in proximity of the substantially flat body (20), wherein said first (25) and fourth (28) segments are substantially parallel to each other and substantially perpendicular to said third segment (27),
wherein said third segment (27) is substantially parallel to said base (23),
wherein said second segment (26) connects said first segment (25) to said third segment (26) and is inclined toward said fourth segment (28) so that the length / of the third segment (27) is shorter than the width L of said substantially flat body (20) as measured in correspondence of the connection point between said first (25) and second (26) segment,
wherein said flat body has rounded corners between said second (26) and third (27) segments and between said third (27) and fourth (28) segments,
characterized in that said flat body has rounded edges defined by said first (25), second (26), third (27) and fourth (28) segments,
wherein the length / of said third segment (27) is between 0.75L and 0.85L, where L is the width of said substantially flat body (20),
wherein the distance d between the third segment (27) and the connection point between the first (25) and the second (26) segments is between 0.30D and 0.40D, where D is the length of the substantially flat body (20) as measured from the base (23) to the third segment (27). - The Medium Voltage line switch contact arrangement (1) according to claim 1, characterized in that the length / of said third segment (27) is between 0.77L and
- The Medium Voltage line switch contact arrangement (1) according to claim 1, characterized in that the distance d between said third segment (27) and the connection point between the first (25) and the second (26) segments is between 0.33D and 0.38D.
- The Medium Voltage line switch contact arrangement (1) according to claim 1, characterized in that it comprises an arc chamber (5) comprising a supporting element (51) fixed to said fixed contact (2) and extending in the direction of said movable contact assembly (3), said arc chamber (5) further comprising a plurality of plates (52) having a first end (53) operatively connected to said supporting element (51) and a second end (54) which is substantially U shaped and defines a passage for said first (31) and second (32) flat blades of said movable contact assembly (3).
- The Medium Voltage line switch contact arrangement (1) according to claim 4, characterized in that it comprises an arcing electrode (55) positioned on said supporting element (51) in correspondence of the connection point between said first (25) and second (26) segments and protruding in the direction of said movable contact assembly (3).
- A Medium voltage line switch comprising a contact arrangement (1) according to one of the preceding claims.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09159292.3A EP2249359B1 (en) | 2009-05-04 | 2009-05-04 | Medium voltage line switch contact arrangement. |
ES09159292.3T ES2687407T3 (en) | 2009-05-04 | 2009-05-04 | Medium voltage line switch contact arrangement |
CN2009102063466A CN101882508A (en) | 2009-05-04 | 2009-10-15 | Medium voltage line switch contact arrangement and medium voltage line switch including the same |
CN2009201787540U CN201608057U (en) | 2009-05-04 | 2009-10-15 | Medium-voltage line switch contact device and medium-voltage line switch comprising same |
RU2010117358/07U RU99898U1 (en) | 2009-05-04 | 2010-04-30 | MEDIUM VOLTAGE LINE SWITCH CONTROL UNIT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09159292.3A EP2249359B1 (en) | 2009-05-04 | 2009-05-04 | Medium voltage line switch contact arrangement. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2249359A1 EP2249359A1 (en) | 2010-11-10 |
EP2249359B1 true EP2249359B1 (en) | 2018-08-15 |
Family
ID=41051990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09159292.3A Active EP2249359B1 (en) | 2009-05-04 | 2009-05-04 | Medium voltage line switch contact arrangement. |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2249359B1 (en) |
CN (2) | CN101882508A (en) |
ES (1) | ES2687407T3 (en) |
RU (1) | RU99898U1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2249359B1 (en) * | 2009-05-04 | 2018-08-15 | ABB Schweiz AG | Medium voltage line switch contact arrangement. |
WO2013152555A1 (en) * | 2012-04-10 | 2013-10-17 | Abb Technology Ltd. | Arc-quenching device of switch for low, medium and high voltage applications |
DE102012215479B4 (en) * | 2012-08-31 | 2014-08-21 | Siemens Aktiengesellschaft | Method for closing a switch and switch for carrying out the method |
EP3745441B1 (en) * | 2019-05-29 | 2023-07-05 | ABB S.p.A. | Low voltage contact assembly |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3820489A1 (en) * | 1988-06-16 | 1989-12-21 | Felten & Guilleaume Energie | Encapsulated switch disconnector arrangement |
DE19904930C2 (en) * | 1999-02-06 | 2000-12-14 | Felten & Guilleaume Ag | Switches for use in SF6 medium-voltage switchgear |
EP2249359B1 (en) * | 2009-05-04 | 2018-08-15 | ABB Schweiz AG | Medium voltage line switch contact arrangement. |
-
2009
- 2009-05-04 EP EP09159292.3A patent/EP2249359B1/en active Active
- 2009-05-04 ES ES09159292.3T patent/ES2687407T3/en active Active
- 2009-10-15 CN CN2009102063466A patent/CN101882508A/en active Pending
- 2009-10-15 CN CN2009201787540U patent/CN201608057U/en not_active Expired - Lifetime
-
2010
- 2010-04-30 RU RU2010117358/07U patent/RU99898U1/en active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP2249359A1 (en) | 2010-11-10 |
ES2687407T3 (en) | 2018-10-25 |
CN201608057U (en) | 2010-10-13 |
RU99898U1 (en) | 2010-11-27 |
CN101882508A (en) | 2010-11-10 |
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