CN102017039B - Heat dissipating means for circuit-breaker and circuit-breaker with such heat dissipating means - Google Patents
Heat dissipating means for circuit-breaker and circuit-breaker with such heat dissipating means Download PDFInfo
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- CN102017039B CN102017039B CN200880119290.4A CN200880119290A CN102017039B CN 102017039 B CN102017039 B CN 102017039B CN 200880119290 A CN200880119290 A CN 200880119290A CN 102017039 B CN102017039 B CN 102017039B
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Abstract
The present invention discloses a circuit breaker comprising: a vacuum chamber; a fixed contact and a movable contact disposed in a vacuum chamber; a fixed contact stem supporting said fixed contact in said vacuum chamber and extending outwards from a first end of said vacuum chamber; a movable contact stem supporting said movable contact in said vacuum chamber for reciprocal movement between contact with and separated from said fixed contact, and extending outwards from a second end of said vacuum chamber; a first electrical conductor coupled to said fixed contact stem; a second electrical conductor coupled to said movable contact stem; at least one heat dissipating means disposed for at least one of said fixed contact and movable contact; wherein, the heat dissipating means is hollow and has an external surface and internal surface; a plurality of fins provided on said internal surface, wherein at least one groove is opened on each fin in the direction substantially vertical to the air convection direction, and the air convection direction which the fins define is in parallel to that of reciprocal movement of movable contact stem.
Description
Technical field
The present invention relates to circuit breaker, particularly medium voltage breaker.More particularly, the present invention relates to the hot heat abstractor that produces for the electric current that flows through circuit breaker.
Background technology
Circuit breaker (CB) is for for example, known overload protection arrangement such as the same equipment of powerful device (, engine, power transmission line, transformer, generator etc.).When electric current flows through CB, the resistance of the contact jaw of CB, contact lever and electric conductor produces heat.Suppose that resistance is constant, R for example, the heat that the electric current I flowing through produces is approximately I
2r.In practice, resistance R increases the rising of the temperature along with contact jaw, contact lever and electric conductor, and the heat producing is the reason that temperature raises.Therefore the heat, in fact producing will be far longer than calculated value.As a rule; because the high temperature that brings of heat of serving as reasons can cause early aging, the protective circuit misoperation of insulation unit even contact jaw and contact lever distortion finally cause CB fault, so the heat that the resistance of the contact jaw of CB, contact lever and electric conductor produces is disadvantageous.
Therefore, for a long time, how to CB, heat radiation is the popular problem of this area always, and this been has has been researched and developed to different apparatus and method.
Fig. 1 illustrates disclosed Polar armature in disclosed Chinese patent application CN1427431.Polar armature comprises extreme 2 and utmost point bearing 3, and its each outfit is by fin 9.This heat dissipating method is applicable to fixation of C B, but is not suitable for removable CB.In addition, because Polar armature is immersed in SF6 gas, so insulation is not the key factor that will consider.
Patent application US5,753,875 is open for producing hot heat dissipating method in CB.In the disclosure, as shown in Figure 2 A, radiator 43 is placed in to the heat radiation that fixing and movable contact lever strengthens CB.Fig. 2 B illustrates the detailed structure of radiator 43.Radiator 43 comprises the one group every groove radially extending that has the lamination of central aperture and every lamination is divided into some finger-like sheets.After assembling, the groove of lamination forms many by the passage radially extending of radiator.The air of this passage of flowing through will be taken away heat from radiator, and this has improved the heat radiation of CB.In practice, for efficiently radiates heat, the size of radiator is very large; But the free space of the radiator of CB, particularly for the removable CB as shown in above-mentioned patent application, is very limited.In addition, at the drift angle place of finger-like sheet, will form charge concentration, this insulation to CB is disadvantageous.
Patent application WO2006/040243 provides the cooling-part by equipment an electric conductor to be connected to another heat sink conception, for example, the contact lever of CB is connected to his moving contact end.Fig. 3 illustrates the structure of this equipment.As shown in Figure 3, the structure of link is complicated and cooling-part needs additional space, and this is disadvantageous for the limited CB of free space.
Summary of the invention
The free space that the object of the invention is to provide the heat radiation approach of CB and more effectively uses the thermal component in CB.The present invention does not have negative effect to the insulating properties of CB.
The outer surface of one embodiment of the present of invention based on thermal component and inner surface improve heat radiation and reduce the requirement to space simultaneously.In this embodiment, design thermal component so that cold air can be flowed through naturally it and effectively take away the heat producing in CB.
According to an aspect of the present invention, provide a kind of circuit breaker.This circuit breaker comprises and is arranged in described vacuum extinction indoor fixedly contact jaw and movable contact; Fixing contact lever, it is at fixing contact jaw and stretching out from the first end of described vacuum interrupter described in described vacuum interrupter inner support; Movable contact lever, its at movable contact described in described vacuum interrupter inner support in case with fixing contact jaw contact and separated between reciprocating motion and stretching out from the second end of vacuum interrupter; With the first electric conductor being connected with described fixedly contact lever; The second electric conductor being connected with described movable contact lever.This circuit breaker is also included as at least one radiator that produces heat for circuit breaker.This radiator is to comprise outside and inner hollow body.A plurality of fins are arranged on described inner surface, wherein on each fin, with the direction substantially vertical with cross-ventilated direction, have at least one groove, and it is parallel with the reciprocating direction of described movable contact lever that wherein said fin limits cross-ventilated direction.Outer surface and inner surface are respectively formed on outside and inside.Inside is configured for cross-ventilated passage.Air is with the parallel direction convection current of the vibration-direction with described movable contact lever.On inner surface, arrange a plurality of fins strengthen heat radiation.Inside is configured for holding electric conductor and forms inner space.In a further advantageous embodiment, inside and outsidely by common face, cut apart, wherein inner air duct and outside another air duct that is different from internal air passageway that extends to of extending to.
In a preferred embodiment, the first electric conductor and described fixedly contact lever are connected in the first bond end; The second electric conductor and described movable contact lever are connected in the second bond end; And described radiator and the first bond end are connected with at least one in the second bond end.
In a further advantageous embodiment, radiator is fixed to the second bond end of circuit breaker, and the outside pedestal that forms a plurality of grooves on its outer surface that forms.That is, groove for example, extends to offside edge (for example, lower limb) from a lateral edges (top edge) of outer surface.Fin is connected to the face of pedestal and extends inward on inner surface.In addition, smooth for air, fin is separated from one another.
In a further advantageous embodiment, radiator is fixed to the first bond end of circuit breaker and comprises pedestal, and wherein pedestal comprises three.Two faces are wherein relative and are parallel to each other.The 3rd face be perpendicular to above-mentioned two faces, and connect these two faces to form " U " shape pedestal.Described two faces are the form with the barrier of parallel to each other and separated column.Extend the inner space of a plurality of fins from each column to pedestal.Parallel to each other and the vertical pillars of fin is to form a plurality of juxtapositions each other and separated pectinate texture.
In a further advantageous embodiment, switchgear also comprises the connector for the movable contact lever of the electric conductor of CB and its is connected, wherein connector comprise for connect the first linkage unit of described removable contact lever with for being connected the second linkage unit of electric conductor.The second linkage unit comprises the flexible connecting member that is divided into a plurality of separation members, to improve connection reliability and increase area of dissipation.
In a further advantageous embodiment, flexible connecting member comprises at least three separation members.
In a further advantageous embodiment, in each in separation member, form at least one cannelure.
In a further advantageous embodiment, each separation member comprises for connecting the overlap of the second electric conductor.
In a further advantageous embodiment, overlap at least one cannelure that to comprise described overlap cutting be sub-separation member.
In a further advantageous embodiment, the first linkage unit has for holding the hole of described movable contact lever, on the inner surface in described hole, forms flange, and after installing, described flange is combined with the end face of described movable contact lever.
According to one embodiment of present invention, electric conductor is the hollow cylinder that is formed with cannelure on it.Wherein, cylindrical inner surface has longitudinal rib so that inner surface is fluctuating shape in a circumferential direction.
In a further advantageous embodiment, the first electric conductor comprises overlap and current-carrying part, and described current-carrying part is the hollow cylinder that is formed with cannelure on it, and described cylindrical inner surface has longitudinal rib.
In a further advantageous embodiment, the second electric conductor comprises overlap and current-carrying part, and described current-carrying part is the hollow cylinder that is formed with cannelure on it, and described cylindrical inner surface has longitudinal rib.
Accompanying drawing explanation
Fig. 1 illustrates the existing conductive equipment with cooling-part;
Fig. 2 A illustrate according on its contact lever of prior art with the CB of radiator;
Fig. 2 B illustrates the detailed structure of the radiator of the CB shown in Fig. 2;
Fig. 3 illustrates band and is useful on the link that the contact lever of CB is connected to the cooling-part of its movable contact;
Fig. 4 A and 4B illustrate the structure of thermal component according to a preferred embodiment of the invention;
Fig. 5 A-5C illustrates the structure of thermal component according to a further advantageous embodiment of the invention;
Fig. 6 A and 6B illustrate the structure of link according to a preferred embodiment of the invention;
The cutaway view of the structure of link after Fig. 6 C illustrates and is arranged in CB;
Fig. 7 illustrates the structure of movable contact lever according to a preferred embodiment of the invention;
Fig. 8 illustrates the structure of fixedly contact lever according to a preferred embodiment of the invention; With
Fig. 9 illustrates the assembling of CB according to a preferred embodiment of the invention, and it comprises thermal component and link.
Embodiment
Fig. 9 illustrates the assembly drawing of switchgear, for example, and according to circuit breaker of the present invention (CB) 1.CB1 comprises: vacuum interrupter 2, it is taken in for connecting and/or cut off fixedly contact jaw and the movable contact (not shown) of circuit.Corresponding fixedly contact lever is at the fixing contact jaw and stretching out from the upper end of vacuum interrupter 2 of vacuum interrupter 2 inner supports, and movably contact lever at vacuum interrupter 2 inner support movable contacts and stretch out from the lower end of vacuum interrupter 2.The combination of the second contact lever and movable contact can be in vacuum interrupter 2 reciprocating motion in case with fixedly contact jaw contact and/or separated.The general principle of having described CB above, it does not illustrate in the drawings, but should be apparent to those skilled in the art.CB of the present invention also comprises electric conductor 3 and 4, and CB is connected to protected equipment (not shown), for example engine, power transmission line, transformer or generator.CB also comprises connector 9, operating mechanism casing 8 and the insulator 7 for movable contact being connected to electric conductor 4.Operating mechanism cover 8 is taken in for operating the operating mechanism of CB.Insulator 7 is by operation part and loading section insulation.According to Fig. 9, thermal component 5 is arranged in electric conductor 3 and the fixing bond end of contact lever.In addition, another thermal component 6 is arranged in the bond end of connector 9 and electric conductor 4.Should be appreciated that thermal component can be arranged in other positions that heat energy is enough transmitted to.For example, thermal component also can be arranged in connector and conductor place.When thermal component being arranged into from the closer position of thermal source, such as contact jaw in circuit breaker etc., it has preferably effect.In addition, action bars 10 is connected with movable contact and operates to connect and/or cut off CB by operating mechanism.
Fig. 4 A illustrates the structure of thermal component 5, and Fig. 4 B illustrates along the cutaway view of the thermal component 5 of Fig. 4 A center line I-I to export its detailed internal structure.After installation, thermal component 5 adapts the electric conductor with shown in Fig. 74.After installation, the water jacket 51 being positioned on thermal component 5 is vertical with ground.
For more effectively, from electric conductor 4 heat by conductions, thermal component 5 is suitable for the contact-making surface of raising and conductor.For example, the surperficial 52a of a part of fin 52 has the profile of the part 42a of the outer surface that coordinates conductor 4.And some fins also have special shape, their surperficial 52b has the profile of other parts 41b of the outer surface that coordinates conductor 4.
As mentioned above, heat will be taken away by circulating in the cold air of the passage 55 of thermal component 5.By said structure, first, the heat producing in circuit breaker is transmitted to thermal component 5.Secondly, therefore by the cold circuit breaker that goes of cross-ventilation occurring in the passage 55 of thermal component 5.In addition, fin 52 is designed to the direction extension substantially parallel with the direction of insertion of conductor 4.Thus, the contact area of thermal component and conductor significantly increases.Because the contact area increasing improves heat conduction, so heat radiation towards periphery more effectively.Convection current emulation shows that this relies on total contact area of fin (heat radiation) according to embodiments of the invention heat conduction efficiency raising 10-30%.
In order to improve area of dissipation, the outer surface of pedestal 51 is joined a plurality of fin 51a.In order more preferably to utilize gaseous exchange, preferably, as shown in Fig. 4 A and 4B, be vertically formed groove.That is,, after installation, groove extends with the direction vertical with ground.
In addition, as shown in Figure 9, connector 9 is positioned on thermal component 5, and the air that flows through parts 5 is directed to connector 9 and further improves heat radiation.Should be understood that, thermal component 5 also can be arranged at least one contact lever and conductor.
Fig. 5 A illustrates the structure of thermal component 6, and Fig. 5 B and Fig. 5 C are the cutaway views along II-II and III-III in Fig. 5 A, and it at length illustrates respectively the structure of parts 6.As shown in Figure 8, after installation, thermal component 6 will with electric conductor 3 overall co-ordinations.
In an embodiment of the present invention, each pectinate texture is replaced in conjunction with forming by a plurality of short fins and long fin.Each end face carrys out combination with the coplanar form of corresponding end-faces of other fins so that the comb back of formation pectinate texture with it for short fin and long fin, and it is for the column of barrier.Other ends of long fin or free end are as the fin extending based on pedestal inner space.
In an embodiment of the present invention, thermal component 6 comprises two-part structure as shown in Figure 5.That is, a part comprises face 611 and face 612a and from the fin 62 of its extension, and another part comprises face 612 and face 611a and from the fin 62 of its extension.These two parts are bonded to each other to form whole thermal component 6.In above-mentioned configuration, the fin 62 extending from two opposite faces forms passages 63 and its relative free end holds beam 311 or 312, and after installing with box lunch, each free end is securely in conjunction with side 311a, 311b, or 312a, 312b.By this configuration, the heat producing in conductor 3 can directly be transmitted to thermal component 6.
In order to strengthen heat radiation, the present invention also provides improved connector 9, for the movable contact lever of CB being connected to the appropriate section of electric conductor 4.Fig. 6 A and 6B illustrate the structure of this connector 9.
As shown in Figure 6A, connector 9 comprise for connect the first linkage unit 91 of described removable contact lever with for being connected the second linkage unit 92 of the second electric conductor 4.The first linkage unit 91 has for holding the hole 911 of movable contact lever.The second linkage unit 92 comprises the flexible connecting member being comprised of a plurality of separation members 921,922,923,924, for improving connection reliability and increasing area of dissipation.With traditional connector comparison, connector of the present invention comprises that a plurality of separation members with thinner profile improve its flexibility.In a preferred embodiment, each separation member of flexible connecting member is equipped with at least one cannelure 93 shown in Fig. 6 A and 6B further to improve flexibility.In another preferred embodiment, the lower end of groove 93 extends downward the edge of groove 93 separation members of living in, for example, the edge 921a of separation member 921, so that the standing part of this separation member 94 is divided into sub-separation member, the second connector will be more reliable with contacting of electric conductor 4, to further reduce contact resistance and further reduce thus the heat producing in lap-joint causing due to contact resistance.
In a preferred embodiment of the invention, hole 911 is equipped with flange 912, to coordinate movable contact by push rod (action bars) 10.As shown in Figure 6 C, flange 912 be pushed to movable contact lever one end and with its combination, to be increased in the contact area between connector 9 and movable contact lever, reduce thus contact resistance and consequent heat.Another advantage of this structure is before connector 9 is fixed to movable contact lever the most at last, and push rod 10 support connecting pieces are to limit the installation that CB is simplified in installation site.
Fig. 7 and 8 illustrates respectively the structure of electric conductor 4 according to an embodiment of the invention and 3.As shown in FIG. 7 and 8, electric conductor comprises respectively overlap 31,41 and current-carrying part 32,42.Overlap 31 is designed to be connected and fixed contact lever and holds thermal component 6, and overlap 41 is designed to connect connector 9 and takes in thermal component 5.Current-carrying part 32 and 42 is designed to further improve thermal diffusivity and arrives conductivity.
Take current-carrying part 42 as example.As shown in Figure 7, current-carrying part 42 is the hollow cylinders that are formed with cannelure 43 on it, and cylindrical inner surface has longitudinal rib 44 so that inner surface is fluctuating shape in a circumferential direction.According to said structure, the region of inner surface is increased the heat producing in contact lever thus and can more effectively sheds.According to said structure, increased the cross-sectional area of contact lever of effective conduction to allow larger region for the electric current of the electric conductor of flowing through.Lower than given load, this means be used to form the material of electric conductor can be thinner, this improves radiating efficiency for Air Flow provides more inner space.
Although illustrate and described the utility model with reference to some preferred embodiment of the present invention, but it will be appreciated by those skilled in the art that, in the situation that not deviating from the spirit and scope of the present invention as defined in appended claims, can to it, make a variety of changes in the form and details.
Claims (22)
1. a circuit breaker (1), comprising:
Vacuum interrupter (2);
Be arranged in fixedly contact jaw and movable contact in described vacuum interrupter (2);
Fixing contact lever, it is at fixing contact jaw and stretching out from the first end of described vacuum interrupter (2) described in described vacuum interrupter (2) inner support;
Movable contact lever, its at movable contact described in described vacuum interrupter (2) inner support in case with fixing contact jaw contact and separated between reciprocating motion and stretching out from the second end of vacuum interrupter (2);
The first electric conductor (3) being connected with described fixedly contact lever;
The second electric conductor (4) being connected with described movable contact lever; With
At least one radiator (5,6) at least one layout in described fixedly contact jaw and described movable contact;
It is characterized in that:
Described radiator (5,6) is the hollow body that comprises outer surface and inner surface; A plurality of fins (52,62) be arranged on described inner surface, wherein at each fin (52,62) above with the direction substantially vertical with cross-ventilated direction, have at least one groove, it is parallel with the reciprocating direction of described movable contact lever that wherein said fin (52,62) limits cross-ventilated direction.
2. circuit breaker as claimed in claim 1 (1), wherein the surface (52b) of a plurality of fins (52) has the outer surface of cooperation electric conductor (4).
3. circuit breaker as claimed in claim 1 (1), wherein the first electric conductor (3) is connected in the first bond end with described fixedly contact lever; The second electric conductor (4) is connected in the second bond end with described movable contact lever; And described radiator (5,6) and the first bond end are connected with at least one in the second bond end.
4. circuit breaker as claimed in claim 1 (1), wherein said radiator (5) also comprises first surface (511,611), second (512,612) and the 3rd (513,613); First surface (511,611) and second (512,612) parallel to each other and respectively from two edges of the 3rd (513,613) with identical, substantially extend with the 3rd direction that (513,613) are vertical.
5. circuit breaker as claimed in claim 4 (1), wherein said fin (52) is from the described inner surface that inner surface stretches out and only its one end is fixed to described the 3rd (513) of the 3rd (513).
6. circuit breaker as claimed in claim 1 (1), after wherein said outer surface is formed with and installs its direction with substantially vertical a plurality of grooves (51a).
7. circuit breaker as claimed in claim 4 (1), has in wherein said the 3rd for by the mouth (53) of the second electric conductor (4).
8. circuit breaker as claimed in claim 7 (1), the diameter of wherein said mouthful (53) matches with the overall diameter of the second electric conductor (4), so that described the 3rd (513,613) and described the second electric conductor (4) combination securely after installing.
9. circuit breaker as claimed in claim 4 (1), wherein said fin (52) from the 3rd (513,613) to extend internally and to be separated from each other with the 3rd basic vertical direction.
10. circuit breaker as claimed in claim 4 (1), wherein said first surface (611) and described second (612) are formed with a plurality of parallel to each other and columns (611a) of separating.
11. circuit breakers as claimed in claim 10 (1), with the direction of substantially vertical described column (611a), each from described column (611a) extends internally wherein said fin (62), and is separated from each other.
12. circuit breakers as claimed in claim 10 (1), each in wherein said column (611a) is replaced in conjunction with forming by a plurality of short fins and long fin, each in wherein said short fin and long fin has the end face coplanar with the end face of other fins, and the other end of described long fin forms fin (62).
13. circuit breakers (1) as described in one of claim 7 to 9, wherein said circuit breaker (1) comprises at least two radiators (6).
14. circuit breakers as claimed in claim 1 (1), also comprise the connector (9) for the second electric conductor (4) is connected with described movable contact lever, described connector (9) comprise for connect first linkage unit (91) of described removable contact lever with for being connected second linkage unit (92) of the second electric conductor (4), wherein the second linkage unit (92) comprises by the separation member (921 that is connected to the first linkage unit (91), 922,923,924) flexible connecting member forming.
15. circuit breakers as claimed in claim 14 (1), wherein said flexible connecting member is comprised of at least three separation members.
16. circuit breakers as claimed in claim 14 (1), wherein form at least one cannelure (93) in each in described separation member.
17. circuit breakers (1) as described in one of claim 14 to 16, wherein described in each, separation member comprises the overlap (94) for connecting the second electric conductor (4).
18. circuit breakers as claimed in claim 17 (1), wherein said overlap (94) comprises at least one cannelure (93) of described overlap (94) cutting.
19. circuit breakers as claimed in claim 14 (1), wherein said the first linkage unit (91) has the hole (911) for holding described movable contact lever, on the inner surface of described hole (911), form flange (912), and after installing, described flange (912) is combined with the end face of described movable contact lever.
20. circuit breakers as claimed in claim 1 (1), wherein the first electric conductor (3) comprises overlap (31) and current-carrying part (32), described current-carrying part (32) is the hollow cylinder that is formed with cannelure (33) on it, and described cylindrical inner surface has longitudinal rib (34).
21. circuit breakers as claimed in claim 1 (1), wherein the second electric conductor (4) comprises overlap (41) and current-carrying part (42), described current-carrying part (42) is the hollow cylinder that is formed with cannelure (43) on it, and described cylindrical inner surface has longitudinal rib (44).
22. circuit breakers as claimed in claim 1 (1), wherein said circuit breaker is removable circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200880119290.4A CN102017039B (en) | 2007-12-07 | 2008-12-05 | Heat dissipating means for circuit-breaker and circuit-breaker with such heat dissipating means |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNPCT/CN2007/071203 | 2007-12-07 | ||
| PCT/CN2007/071203 WO2009079871A1 (en) | 2007-12-07 | 2007-12-07 | Circuit breaker with a heat dissipating means |
| CNPCT/CN2007/07120.3 | 2007-12-07 | ||
| CN200880119290.4A CN102017039B (en) | 2007-12-07 | 2008-12-05 | Heat dissipating means for circuit-breaker and circuit-breaker with such heat dissipating means |
| PCT/CN2008/001971 WO2009074016A1 (en) | 2007-12-07 | 2008-12-05 | Heat dissipating means for circuit-breaker and circuit-breaker with such heat dissipating means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102017039A CN102017039A (en) | 2011-04-13 |
| CN102017039B true CN102017039B (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880119290.4A Active CN102017039B (en) | 2007-12-07 | 2008-12-05 | Heat dissipating means for circuit-breaker and circuit-breaker with such heat dissipating means |
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| Country | Link |
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| CN (1) | CN102017039B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768913B (en) * | 2011-05-04 | 2015-12-16 | 西门子公司 | The heating panel of switching device and switching device thereof |
| KR101545889B1 (en) * | 2013-12-20 | 2015-08-20 | 엘에스산전 주식회사 | Terminal Structure of Main Circuit Part of Vacuum Circuit Breaker |
| US10249459B2 (en) * | 2016-09-19 | 2019-04-02 | Eaton Intelligent Power Limited | Advanced cooling system for electrical equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1180916A (en) * | 1996-10-15 | 1998-05-06 | 尹顿公司 | Heat sink for contact stems of vacuum interrupter and vacuum interrupter therewith |
| CN1427431A (en) * | 2001-12-21 | 2003-07-02 | 西门子公司 | Polar armature |
| CN1474486A (en) * | 2002-08-07 | 2004-02-11 | 三菱电机株式会社 | Breaking device for power |
| CN1787147A (en) * | 2004-12-09 | 2006-06-14 | 三菱电机株式会社 | Switchgear |
| CN1787146A (en) * | 2004-12-09 | 2006-06-14 | 三菱电机株式会社 | Opening and closing device |
-
2008
- 2008-12-05 CN CN200880119290.4A patent/CN102017039B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1180916A (en) * | 1996-10-15 | 1998-05-06 | 尹顿公司 | Heat sink for contact stems of vacuum interrupter and vacuum interrupter therewith |
| CN1427431A (en) * | 2001-12-21 | 2003-07-02 | 西门子公司 | Polar armature |
| CN1474486A (en) * | 2002-08-07 | 2004-02-11 | 三菱电机株式会社 | Breaking device for power |
| CN1787147A (en) * | 2004-12-09 | 2006-06-14 | 三菱电机株式会社 | Switchgear |
| CN1787146A (en) * | 2004-12-09 | 2006-06-14 | 三菱电机株式会社 | Opening and closing device |
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| CN102017039A (en) | 2011-04-13 |
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Effective date of registration: 20180427 Address after: Baden, Switzerland Patentee after: ABB TECHNOLOGY LTD. Address before: Zurich Patentee before: ABB T & D Technology Ltd. |