EP2306482A1 - Main circuit terminal assembly for vacuum circuit breaker - Google Patents
Main circuit terminal assembly for vacuum circuit breaker Download PDFInfo
- Publication number
- EP2306482A1 EP2306482A1 EP09172183A EP09172183A EP2306482A1 EP 2306482 A1 EP2306482 A1 EP 2306482A1 EP 09172183 A EP09172183 A EP 09172183A EP 09172183 A EP09172183 A EP 09172183A EP 2306482 A1 EP2306482 A1 EP 2306482A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamp
- main circuit
- terminal assembly
- movable unit
- heat sink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/6606—Terminal arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
- H01H1/5822—Flexible connections between movable contact and terminal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/6606—Terminal arrangements
- H01H2033/6613—Cooling arrangements directly associated with the terminal arrangements
Definitions
- the present invention relates to a vacuum circuit breaker, and more particularly, to a main circuit terminal assembly for a vacuum circuit breaker.
- a vacuum circuit breaker is an electrical device to protect load equipment and an electrical line from an overload or overcurrent which may occur in an electrical circuit due to an accident in the circuit (e.g., a short-circuit, or the like), by breaking the electrical circuit.
- a vacuum circuit breaker which requires a small installation area as well as a large capacity, a small-sized vacuum circuit breaker has been developed to conduct a large rated current therethrough. Accordingly, temperature increase of the vacuum circuit breaker by the large current has been considered as an important issue.
- a main circuit unit includes a vacuum interrupter having a fixed contact and a movable contact for opening or closing a circuit in a vacuum container, and a terminal unit for respectively being connected to the fixed contact and the movable contact of the vacuum interrupter and being connected to a circuit between a power source and an electrical load.
- heat is mainly generated in a main conductive unit including a bus bar of the terminal unit, a connection terminal for a connection with the circuit, a clamp for connecting the bus bar to the vacuum interrupter.
- the clamp does not have enough surface area as well as any means for effective heat radiation, thus to make it difficult to prevent temperature increase of a conductor.
- a main circuit terminal assembly for a vacuum circuit breaker according to the present invention which is electrically connected to a vacuum interrupter, comprising:
- the main circuit terminal assembly for a vacuum circuit breaker is a device for electrically being connected to a vacuum interrupter 1, and includes a clamp 2, a heat sink 3, a flexible shunt 4, a terminal block 5, and a contactor unit 6.
- the vacuum interrupter 1 is generally configured to open or close contacts in a vacuum inner space of a cylindrical vacuum container configured of a ceramic material. A fixed contact and a movable contact are provided inside the vacuum container.
- the vacuum interrupter 1 has a movable unit 1 a connected to the movable contact so as to be movable to open position or close position of the movable contact, and extending to an outside of the vacuum container. As shown in Fig. 2 , the movable unit 1a is downwardly extended from the vacuum interrupter 1.
- the clamp 2 is electrically connected to the movable unit 1 a of the vacuum interrupter 1.
- the clamp 2 is implemented as a pair of electrical conductors such that the movable unit 1 a is supported by being fitted therein.
- the clamp 2 is configured of pure copper with an excellent conductivity to function as an electrical conductive path. Descriptions of detailed construction of the clamp 2 will be given with reference to Fig. 3 .
- the heat sink 3 is fixed to the clamp 2 so as to increase a surface area of the clamp 2.
- the heat sink 3 may be manufactured by aluminum molding. Descriptions of a detailed construction of the heat sink 3 will be given with reference to Fig. 4 .
- the flexible shunt 4 has one end thereof electrically and mechanically (electrically and mechanically) connected to the clamp 2, and is configured as a flexible electrical conductor to enable the movement of the movable unit 1a.
- the flexible shunt 4 may be configured in which a plurality of thin films configured of pure copper having an excellent conductivity are laminated, and both ends thereof are compressed and welded.
- the terminal block 5 is electrically and mechanically connected to another end (i.e., opposite to the one end connected to the clamp) of the flexible shunt 4, and may be implemented as an electrical conductor, such as a copper alloy (e.g., pure cooper, brass, or the like).
- a copper alloy e.g., pure cooper, brass, or the like.
- the contactor unit 6 is configured as an electrical conductor and is electrically connected to the terminal block 5.
- the contactor unit 6 includes a plurality of clip-shaped contactors.
- the clip-shaped contactors are configured in which a plurality of conductive bars, so called 'fingers,' configured as an electrical conductor are arranged in a cylindrical shape, and the plurality of conductive bars are fastened by a ring having elasticity so as to prevent a separation of the conductive bars and to restore its original shape.
- the clip-shaped contactors in a conventional vacuum circuit breaker are electrically and mechanically connected to a terminal unit of a cradle having connection terminal units for a power source side and an electrical load side.
- the clamp 2 In order to maximize an installation space of the heat sink 3 by minimizing an area being connected by the flexible shunt 4, the clamp 2 includes horizontal slit portions 2b and 2b' for fitting (inserting) respective end portions of the flexible shunt 4 thereto.
- the slit portions 2b and 2b' and the end portions of the flexible shunt 4 are connected by welding.
- the clamp 2 is comprises a pair of clamp pieces: a first clamp piece 2a and a second clamp piece 2a'.
- the first and second clamp pieces 2a and 2a' include upper surface portions 2f for mounting the heat sink 3 thereon, and the slit portions 2b and 2b' disposed at a lower portion thereof for fitting the respective end portions of the flexible shunt 4 thereinto.
- the first and second clamp pieces 2a and 2a' have movable unit supporting grooves 2c and 2c' each vertically extending from a central portion of a rear surface thereof and having a semicircular cross section such that the movable unit 1 a of the vacuum interrupter 1 is fitted thereinto so as to be supported.
- each of the first and second clamp pieces 2a and 2a' includes four clamp fastening means insertion holes 2d for allowing to insert clamp fastening means (not shown).
- the insertion holes 2d are penetratingly configured at the front surfaces of the first and second clamp pieces 2a and 2a' toward the rear surfaces thereof.
- the clamp fastening means is a means to support the movable unit 1a of the vacuum interrupter 1 while fastening the first and second clamp pieces 2a and 2a'.
- the clamp fastening means may comprises bolts and nuts sized to be inserted into the insertion holes 2d.
- the first and second clamp pieces 2a and 2a' may respectively have heat sink fixing screw insertion holes 2e disposed at both sides (right and left) thereof such that screws for fixing the heat sink 3 are inserted thereinto.
- the heat sink fixing screw insertion holes 2e may be configured as female threaded holes by a tapping process.
- the fixing screws to be inserted into the heat sink fixing screw insertion holes 2e generally includes a threaded portion tapering to a point at one end with a helical ridge configured on it, and a head portion at the other end thereof with screwdriver insertion grooves.
- Figure 4 is a perspective view showing a heat sink in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention.
- the heat sink 3 includes a plurality of cooling fins 3a vertically extending and spaced from each other at a predetermined interval so as to form a convection passage (flow) of air between the cooling fins 3a.
- the heat sink 3 is positioned, as shown in Fig. 1 , such that the cooling fins 3a are vertically extended, thus to form a plurality of convection passages of air between the cooling fins 3a.
- a pair of fixing screw holes 3b are provided at both ends of the heat sink 3 so as to fix the heat sink 3 onto the upper surface portion 2f of the clamp 2.
- Figure 5 is a perspective view showing an assembly of the clamp and a flexible shunt in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention. As shown in Fig. 5 , the assembly (connection) between the clamp and the flexible shunt in the main circuit terminal assembly for a vacuum circuit breaker according to the present invention is performed as follows:
- each lower portion of the flexible shunt 4 includes four fixing screw insertion holes 4a spaced from each other at a predetermined interval. Such fixing screw insertion holes 4a function as insertion holes for the bolts (not shown) used to connect the flexible shunt 4 to the terminal block 5 as shown in Fig. 1 .
- the movable unit 1 a extending from the lower portion of the vacuum interrupter 1 is inserted (fitted) between the first and second clamp pieces 2a and 2a', more specifically, between the pair of movable unit clamping grooves 2c and 2c'.
- the fastening means such as bolts and nuts (not shown) are inserted into the respective clamp fastening means insertion holes 2d for threaded coupling, thereby allowing the first and second clamp pieces 2a and 2a' to contact and support the movable unit 1a. Accordingly, the electric current may be conducted from the movable unit 1 a toward the first and second clamp pieces 2a and 2a'.
- the heat sinks 3 are disposed on the respective upper surface portions 2f of the first and second clamp pieces 2a and 2a' such that the cooling fins 3a of the heat sink 3 are positioned vertically. Fixing screws are inserted into the respective fixing screw holes 3b of the heat sink 3 and the respective heat sink fixing screw insertion holes 2e of the clamp 2, thus to complete the assembly of the clamp 2 and the heat sink 3.
- the upper end portions of the flexible shunt 4 are fitted into the slit portions 2b and 2b', and the upper end portions of the flexible shunt 4 and the slit portions 2b and 2b' are welded for connection, thus to complete the assembly of the clamp 2 and the flexible shunt 4.
- the fixing screw insertion holes 4a configured at the lower portions of the flexible shunt 4 are aligned with the screw insertion holes (not shown) configured at both side surfaces of the terminal block 5 so as to be coupled to each other using bolts and nuts (not shown), thus to complete the assembly of the flexible shunt 4 and the terminal block 5.
- the terminal block 5 and the contactor unit 6 are pre-assembled.
- a conductive current in an electrical circuit which is introduced from the fixed contact of the vacuum interrupter 1 and flow out to the load side via the contactor unit 6 and the terminal unit of the cradle (not shown) passes through, as shown in Fig. 1 , the movable unit 1 a of the vacuum interrupter 1. Then, the current passes through the clamp 2, the flexible shunt 4, the terminal block 5 and the contactor unit 6, sequentially, thereby flowing to the terminal unit of the cradle.
- heat generating between the movable unit 1 a and the clamp 2 having the movable unit 1a therebetween may be effectively cooled down since the surface area of the clamp 2 is greatly increased by the heat sink 3 fixed to the clamp 2.
- the cooling fins 3a of the heat sink 3 are vertically positioned for the convection of the air, thus to provide a passage (path) allowing the air to flow in a space between the cooling fins 3a. Therefore, the cooling effect for the clamp 2 may greatly be enhanced.
- connection unit between the clamp 2 and the flexible shunt 4 is configured in which the end portions of the flexible shunt 4 are inserted into the respective slit portions 2b and 2b' horizontally configured at the lower portions of the clamp 2 and connected by welding, thus to minimize an area of the clamp 2 to be contacted by the flexible shunt 4 as well as secure an enough area for contact with the heat sink.
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Description
- The present invention relates to a vacuum circuit breaker, and more particularly, to a main circuit terminal assembly for a vacuum circuit breaker.
- In general, a vacuum circuit breaker is an electrical device to protect load equipment and an electrical line from an overload or overcurrent which may occur in an electrical circuit due to an accident in the circuit (e.g., a short-circuit, or the like), by breaking the electrical circuit. Considering recent installation environment of such vacuum circuit breaker which requires a small installation area as well as a large capacity, a small-sized vacuum circuit breaker has been developed to conduct a large rated current therethrough. Accordingly, temperature increase of the vacuum circuit breaker by the large current has been considered as an important issue.
- In the vacuum circuit breaker, a main circuit unit includes a vacuum interrupter having a fixed contact and a movable contact for opening or closing a circuit in a vacuum container, and a terminal unit for respectively being connected to the fixed contact and the movable contact of the vacuum interrupter and being connected to a circuit between a power source and an electrical load. In such main circuit unit, heat is mainly generated in a main conductive unit including a bus bar of the terminal unit, a connection terminal for a connection with the circuit, a clamp for connecting the bus bar to the vacuum interrupter.
- However, in the main circuit terminal assembly for the conventional vacuum circuit breaker, the clamp does not have enough surface area as well as any means for effective heat radiation, thus to make it difficult to prevent temperature increase of a conductor.
- Therefore, it is an object of the present invention to provide a main circuit terminal assembly for a vacuum circuit breaker which can effectively prevent temperature increase by increasing a surface area of a clamp for connecting a vacuum interrupter and a terminal unit.
- Said object of the present invention can be achieved by providing a main circuit terminal assembly for a vacuum circuit breaker according to the present invention which is electrically connected to a vacuum interrupter, comprising:
- a clamp electrically connected to a movable unit of the vacuum interrupter, and configured as a pair of conductors so as to support the movable unit by fitting it thereinto;
- a heat sink fixed to the clamp so as to increase a surface area of the clamp;
- a flexible shunt having one end thereof electrically and mechanicaly connected to the clamp, and configured as a flexible conductor to allow the movable unit to move;
- a terminal block electrically and mechanically connected to another end of the flexible shunt, and configured as an electrical conductor; and
- a contactor unit electrically connected to the terminal block and having a plurality of clip-shaped contactors.
- The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
- In the drawings:
-
Figure 1 is a perspective view showing a structure of a main circuit terminal assembly for a vacuum circuit breaker according to one exemplary embodiment of the present invention; -
Figure 2 is a side view showing the structure of the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention; -
Figure 3 is a perspective view showing a clamp in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention; -
Figure 4 is a perspective view showing a heat sink in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention; and -
Figure 5 is a perspective view showing an assembly of the clamp and a flexible shunt in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention. - Description will now be given in detail of the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
- Referring to
Figs. 1 and 2 , the main circuit terminal assembly for a vacuum circuit breaker according to the present invention is a device for electrically being connected to avacuum interrupter 1, and includes aclamp 2, aheat sink 3, aflexible shunt 4, aterminal block 5, and acontactor unit 6. - The
vacuum interrupter 1 is generally configured to open or close contacts in a vacuum inner space of a cylindrical vacuum container configured of a ceramic material. A fixed contact and a movable contact are provided inside the vacuum container. Thevacuum interrupter 1 has a movable unit 1 a connected to the movable contact so as to be movable to open position or close position of the movable contact, and extending to an outside of the vacuum container. As shown inFig. 2 , the movable unit 1a is downwardly extended from thevacuum interrupter 1. - The
clamp 2 is electrically connected to the movable unit 1 a of thevacuum interrupter 1. Theclamp 2 is implemented as a pair of electrical conductors such that the movable unit 1 a is supported by being fitted therein. Preferably, theclamp 2 is configured of pure copper with an excellent conductivity to function as an electrical conductive path. Descriptions of detailed construction of theclamp 2 will be given with reference toFig. 3 . - The
heat sink 3 is fixed to theclamp 2 so as to increase a surface area of theclamp 2. Preferably, theheat sink 3 may be manufactured by aluminum molding. Descriptions of a detailed construction of theheat sink 3 will be given with reference toFig. 4 . - The
flexible shunt 4 has one end thereof electrically and mechanically (electrically and mechanically) connected to theclamp 2, and is configured as a flexible electrical conductor to enable the movement of the movable unit 1a. Preferably, in order to perform a main function serving as the electrical conductive path, theflexible shunt 4 may be configured in which a plurality of thin films configured of pure copper having an excellent conductivity are laminated, and both ends thereof are compressed and welded. - The
terminal block 5 is electrically and mechanically connected to another end (i.e., opposite to the one end connected to the clamp) of theflexible shunt 4, and may be implemented as an electrical conductor, such as a copper alloy (e.g., pure cooper, brass, or the like). - The
contactor unit 6 is configured as an electrical conductor and is electrically connected to theterminal block 5. Thecontactor unit 6 includes a plurality of clip-shaped contactors. Here, the clip-shaped contactors are configured in which a plurality of conductive bars, so called 'fingers,' configured as an electrical conductor are arranged in a cylindrical shape, and the plurality of conductive bars are fastened by a ring having elasticity so as to prevent a separation of the conductive bars and to restore its original shape. The clip-shaped contactors in a conventional vacuum circuit breaker are electrically and mechanically connected to a terminal unit of a cradle having connection terminal units for a power source side and an electrical load side. - Meanwhile, description of the clamp in the main circuit terminal assembly for a vacuum circuit breaker according to the present invention will be given with reference to
Fig. 3 . - In order to maximize an installation space of the
heat sink 3 by minimizing an area being connected by theflexible shunt 4, theclamp 2 includeshorizontal slit portions flexible shunt 4 thereto. Here, theslit portions flexible shunt 4 are connected by welding. Referring toFig. 3 , theclamp 2 is comprises a pair of clamp pieces: afirst clamp piece 2a and asecond clamp piece 2a'. The first andsecond clamp pieces upper surface portions 2f for mounting theheat sink 3 thereon, and theslit portions flexible shunt 4 thereinto. In addition, the first andsecond clamp pieces unit supporting grooves vacuum interrupter 1 is fitted thereinto so as to be supported. In addition, each of the first andsecond clamp pieces insertion holes 2d for allowing to insert clamp fastening means (not shown). Theinsertion holes 2d are penetratingly configured at the front surfaces of the first andsecond clamp pieces vacuum interrupter 1 while fastening the first andsecond clamp pieces insertion holes 2d. The first andsecond clamp pieces screw insertion holes 2e disposed at both sides (right and left) thereof such that screws for fixing theheat sink 3 are inserted thereinto. The heat sink fixingscrew insertion holes 2e may be configured as female threaded holes by a tapping process. Although not shown, the fixing screws to be inserted into the heat sink fixingscrew insertion holes 2e generally includes a threaded portion tapering to a point at one end with a helical ridge configured on it, and a head portion at the other end thereof with screwdriver insertion grooves. - Meanwhile, descriptions of the detailed structure and installation of the heat sink in the main circuit terminal assembly for a vacuum circuit breaker will be given in detail with reference to
Figs. 4 and1 .Figure 4 is a perspective view showing a heat sink in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention. - Referring to
Fig. 4 , theheat sink 3 includes a plurality of cooling fins 3a vertically extending and spaced from each other at a predetermined interval so as to form a convection passage (flow) of air between thecooling fins 3a. In addition, theheat sink 3 is positioned, as shown inFig. 1 , such that thecooling fins 3a are vertically extended, thus to form a plurality of convection passages of air between the coolingfins 3a. As shown inFig. 4 , a pair of fixingscrew holes 3b are provided at both ends of theheat sink 3 so as to fix theheat sink 3 onto theupper surface portion 2f of theclamp 2. -
Figure 5 is a perspective view showing an assembly of the clamp and a flexible shunt in the main circuit terminal assembly for the vacuum circuit breaker according to one exemplary embodiment of the present invention. As shown inFig. 5 , the assembly (connection) between the clamp and the flexible shunt in the main circuit terminal assembly for a vacuum circuit breaker according to the present invention is performed as follows: - First, the upper ends of the
flexible shunt 4 are fitted into the respective slit portions (2b and 2b' inFig. 3 ) disposed at the lower portion of the first andsecond clamp pieces clamp 2 and configured to have a longer length in a lengthwise direction than in a vertical direction. Then, theslit portions flexible shunt 4 are connected by welding, thus to complete the assembly of theclamp 2 and theflexible shunt 4. InFig. 5 , each lower portion of theflexible shunt 4 includes four fixingscrew insertion holes 4a spaced from each other at a predetermined interval. Such fixingscrew insertion holes 4a function as insertion holes for the bolts (not shown) used to connect theflexible shunt 4 to theterminal block 5 as shown inFig. 1 . - Description of the assembly process of the main circuit terminal assembly for a vacuum circuit breaker according to the present invention will be given in detail with reference to
Figs. 1 to 5 . - As shown in
Figs. 2 and3 , the movable unit 1 a extending from the lower portion of thevacuum interrupter 1 is inserted (fitted) between the first andsecond clamp pieces unit clamping grooves - Next, the fastening means such as bolts and nuts (not shown) are inserted into the respective clamp fastening means
insertion holes 2d for threaded coupling, thereby allowing the first andsecond clamp pieces second clamp pieces - Then, the
heat sinks 3 are disposed on the respectiveupper surface portions 2f of the first andsecond clamp pieces cooling fins 3a of theheat sink 3 are positioned vertically. Fixing screws are inserted into the respective fixingscrew holes 3b of theheat sink 3 and the respective heat sink fixingscrew insertion holes 2e of theclamp 2, thus to complete the assembly of theclamp 2 and theheat sink 3. - The upper end portions of the
flexible shunt 4 are fitted into theslit portions flexible shunt 4 and theslit portions clamp 2 and theflexible shunt 4. - Then, the fixing
screw insertion holes 4a configured at the lower portions of theflexible shunt 4 are aligned with the screw insertion holes (not shown) configured at both side surfaces of theterminal block 5 so as to be coupled to each other using bolts and nuts (not shown), thus to complete the assembly of theflexible shunt 4 and theterminal block 5. Here, theterminal block 5 and thecontactor unit 6 are pre-assembled. - With such configuration, description of the operation of the main circuit terminal assembly for the vacuum circuit breaker according to the present invention will be given with reference to
Figs. 1 to 5 . - A conductive current in an electrical circuit which is introduced from the fixed contact of the
vacuum interrupter 1 and flow out to the load side via thecontactor unit 6 and the terminal unit of the cradle (not shown) passes through, as shown inFig. 1 , the movable unit 1 a of thevacuum interrupter 1. Then, the current passes through theclamp 2, theflexible shunt 4, theterminal block 5 and thecontactor unit 6, sequentially, thereby flowing to the terminal unit of the cradle. - Here, heat generating between the movable unit 1 a and the
clamp 2 having the movable unit 1a therebetween may be effectively cooled down since the surface area of theclamp 2 is greatly increased by theheat sink 3 fixed to theclamp 2. - In addition, as shown in
Figs. 1 and4 , the coolingfins 3a of theheat sink 3 are vertically positioned for the convection of the air, thus to provide a passage (path) allowing the air to flow in a space between the coolingfins 3a. Therefore, the cooling effect for theclamp 2 may greatly be enhanced. - In addition, the connection unit between the
clamp 2 and theflexible shunt 4 is configured in which the end portions of theflexible shunt 4 are inserted into therespective slit portions clamp 2 and connected by welding, thus to minimize an area of theclamp 2 to be contacted by theflexible shunt 4 as well as secure an enough area for contact with the heat sink. - The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present disclosure. The present teachings can be readily applied to other types of apparatuses. This description is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to obtain additional and/or alternative exemplary embodiments.
- As the present invention may be embodied in several forms without departing from the characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (7)
- A main circuit terminal assembly for a vacuum circuit breaker which is electrically connected to a vacuum interrupter, comprising:a clamp electrically connected to a movable unit of the vacuum interrupter, and includes a pair of conductors that supports the movable unit by clamping;a heat sink fixed to the clamp that increases a surface area of the clamp;a flexible shunt having one end thereof electrically and mechanically connected to the clamp, and includes a flexible conductor to allow the movable unit to move;a terminal block electrically and mechanically connected to the other end of the flexible shunt, and configured as an electrical conductor; anda contactor unit electrically connected to the terminal block and having a plurality of clip-shaped contactors.
- The main circuit terminal assembly of claim 1, wherein the clamp has horizontal slit portions configured to insert end portions of the flexible shunt therein and to be connected thereto by welding, so as to secure an installation space of the heat sink by minimizing an area being contacted by the flexible shunt.
- The main circuit terminal assembly of claim 2, wherein the clamp includes a pair of clamp pieces, and
each of the clamp pieces comprises:an upper flat surface portion for mounting the heat sink thereon; andthe slit portion disposed at a lower portion thereof so as to insert the end portion of the flexible shunt and to be connected thereto by welding. - The main circuit terminal assembly of claim 1, wherein the heat sink includes a plurality of cooling fins vertically extending and spaced from each other at a predetermined interval that form a convection passage of air.
- The main circuit terminal assembly of claim 2, wherein each of the clamp pieces includes a movable unit supporting groove vertically extending from a central portion of a rear surface thereof and having a semi-circle cross section such that the movable unit of the vacuum interrupter is fitted thereinto so as to be supported.
- The main circuit terminal assembly of claim 2, further comprising:clamp fastening means for fastening the pair of the clamp pieces so as to fit therein and support the movable unit of the vacuum interrupter between the pair of the clamp pieces.
- The main circuit terminal assembly of claim 6, wherein the clamp fastening means comprises bolts inserted into clamp fastening means insertion holes provided at each clamp piece and nuts threaded-coupled to the bolts,
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES09172183T ES2440697T3 (en) | 2009-10-05 | 2009-10-05 | Main circuit terminal assembly for vacuum circuit breaker |
EP20090172183 EP2306482B1 (en) | 2009-10-05 | 2009-10-05 | Main circuit terminal assembly for vacuum circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20090172183 EP2306482B1 (en) | 2009-10-05 | 2009-10-05 | Main circuit terminal assembly for vacuum circuit breaker |
Publications (2)
Publication Number | Publication Date |
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EP2306482A1 true EP2306482A1 (en) | 2011-04-06 |
EP2306482B1 EP2306482B1 (en) | 2013-09-25 |
Family
ID=41722737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20090172183 Revoked EP2306482B1 (en) | 2009-10-05 | 2009-10-05 | Main circuit terminal assembly for vacuum circuit breaker |
Country Status (2)
Country | Link |
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EP (1) | EP2306482B1 (en) |
ES (1) | ES2440697T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103050327A (en) * | 2012-12-31 | 2013-04-17 | 青岛特锐德电气股份有限公司 | Vacuum circuit breaker and medium-pressure air inflation cabinet |
DE102017206866A1 (en) * | 2017-04-24 | 2018-10-25 | Siemens Aktiengesellschaft | Connection element for a moving contact of a vacuum interrupter and gas-insulated switchgear with a connection element for a moving contact of a vacuum interrupter |
DE102017206929A1 (en) * | 2017-04-25 | 2018-10-25 | Siemens Aktiengesellschaft | Connection element for a vacuum interrupter for a switchgear and method for determining the movement of a moving contact of a vacuum interrupter |
WO2022214216A3 (en) * | 2021-04-07 | 2022-11-17 | Eaton Intelligent Power Limited | Current interrupting module with a resettable current interruption device |
Citations (2)
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WO2006040243A1 (en) * | 2004-10-14 | 2006-04-20 | Siemens Aktiengesellschaft | Coupling device comprising a cooling element |
WO2009074016A1 (en) * | 2007-12-07 | 2009-06-18 | Abb Technology Ltd. | Heat dissipating means for circuit-breaker and circuit-breaker with such heat dissipating means |
-
2009
- 2009-10-05 ES ES09172183T patent/ES2440697T3/en active Active
- 2009-10-05 EP EP20090172183 patent/EP2306482B1/en not_active Revoked
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2006040243A1 (en) * | 2004-10-14 | 2006-04-20 | Siemens Aktiengesellschaft | Coupling device comprising a cooling element |
WO2009074016A1 (en) * | 2007-12-07 | 2009-06-18 | Abb Technology Ltd. | Heat dissipating means for circuit-breaker and circuit-breaker with such heat dissipating means |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103050327A (en) * | 2012-12-31 | 2013-04-17 | 青岛特锐德电气股份有限公司 | Vacuum circuit breaker and medium-pressure air inflation cabinet |
CN103050327B (en) * | 2012-12-31 | 2016-01-13 | 青岛特锐德电气股份有限公司 | Vacuum circuit-breaker and middle pressure gas-filling cabinet |
DE102017206866A1 (en) * | 2017-04-24 | 2018-10-25 | Siemens Aktiengesellschaft | Connection element for a moving contact of a vacuum interrupter and gas-insulated switchgear with a connection element for a moving contact of a vacuum interrupter |
WO2018197150A1 (en) * | 2017-04-24 | 2018-11-01 | Siemens Aktiengesellschaft | Connection element for a moving contact of a vacuum interrupter and gas-insulated switchgear assembly having a connection element for a moving contact of a vacuum interrupter |
CN110537239A (en) * | 2017-04-24 | 2019-12-03 | 西门子股份公司 | The gas isolated switchgear of the terminal component of movement contact for vacuum switch tube and the terminal component with the movement contact for vacuum switch tube |
CN110537239B (en) * | 2017-04-24 | 2022-04-29 | 西门子股份公司 | Terminal element and gas-insulated switchgear assembly |
DE102017206929A1 (en) * | 2017-04-25 | 2018-10-25 | Siemens Aktiengesellschaft | Connection element for a vacuum interrupter for a switchgear and method for determining the movement of a moving contact of a vacuum interrupter |
DE102017206929B4 (en) | 2017-04-25 | 2023-08-10 | Siemens Aktiengesellschaft | Connection element for a vacuum interrupter for a switchgear |
WO2022214216A3 (en) * | 2021-04-07 | 2022-11-17 | Eaton Intelligent Power Limited | Current interrupting module with a resettable current interruption device |
Also Published As
Publication number | Publication date |
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EP2306482B1 (en) | 2013-09-25 |
ES2440697T3 (en) | 2014-01-30 |
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