CN117198782A - Dielectric shielding radiator - Google Patents

Dielectric shielding radiator Download PDF

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Publication number
CN117198782A
CN117198782A CN202310661372.8A CN202310661372A CN117198782A CN 117198782 A CN117198782 A CN 117198782A CN 202310661372 A CN202310661372 A CN 202310661372A CN 117198782 A CN117198782 A CN 117198782A
Authority
CN
China
Prior art keywords
movable contact
heat sink
contact
dielectric
copper
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.)
Pending
Application number
CN202310661372.8A
Other languages
Chinese (zh)
Inventor
M·绍尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Publication of CN117198782A publication Critical patent/CN117198782A/en
Pending legal-status Critical Current

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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
    • 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
    • H01H2001/5827—Laminated connections, i.e. the flexible conductor is composed of a plurality of thin flexible conducting layers
    • 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
    • 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
    • H01H33/025—Terminal arrangements

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

The invention relates to a dielectric shield heat sink (10) comprising a body (20); wherein the body is configured to be mounted around a movable contact (30) of the circuit breaker and around a portion (40) of the copper contact (50) connected to the movable contact; wherein the body is configured to directly contact at least a portion of the copper contact that is connected to the movable contact.

Description

Dielectric shielding radiator
Technical Field
The invention relates to a dielectric shield heat sink, a circuit breaker and a dielectric shield heat sink, and a medium or high voltage switching device.
Background
Medium or high voltage switchgear has one or more circuit breakers, such as vacuum interrupters. Many protruding (bold) parts of such circuit breakers are connected to movable contacts of the vacuum interrupter using flexible copper connections. A flexible copper connection is mounted around the movable contact at one end and is normally held in a rigid position at the other end. Flexibility is provided via flexible copper contacts in the form of copper strips or laminations. This then means that the flexible copper contact has a sharp edge, or at least a small radius edge has a curvature. This is then problematic from a dielectric point of view and can lead to electrical breakdown problems.
Furthermore, this region is one of the hottest regions of the pole section, wherein for high current applications it becomes very hard due to joule heating. However, typically the heat sink again has relatively sharp edges with respect to the ribs, which again is problematic from a dielectric point of view.
These problems need to be solved.
Disclosure of Invention
It would therefore be advantageous to have a technique that addresses both the dielectric problems associated with flexible copper connections to movable contacts of circuit breakers and the heating problems associated with joule heating of the flexible copper connections.
The object of the invention is solved by the subject matter of the independent claims, wherein further embodiments are incorporated in the dependent claims.
In a first aspect, a dielectric shield heat sink is provided that includes a body. The body is configured to be mounted around a movable contact of the circuit breaker and around a portion of the copper contact connected to the movable contact. The body is configured to directly contact at least a portion of the copper contact that is connected to the movable contact.
In this way, the heat sink not only cools the movable contacts and copper contacts of a circuit breaker (such as a vacuum interrupter) by radiative cooling from the outer surface, but may also act as a dielectric shield for the copper contacts, which are typically in the form of flexible copper laminations that must have relatively sharp edges.
In an example, the body is configured to enclose the at least a portion of the copper contact that is connected to the movable contact.
Thus, the heat spreader can cool the copper contacts and provide a dielectric shield.
In an example, the body is configured to form a dielectrically enclosed housing.
In an example, the body is configured to form a dielectrically enclosed housing relative to the at least a portion of the copper contact connected to the movable contact.
In an example, the body is configured to form a dielectrically enclosed housing relative to a portion of the movable contact to which the portion of the copper contact is connected.
In this way, electrical breakdown is prevented.
In an example, the body is configured to form a closed housing with respect to at least a portion of the copper contact that is connected to the movable contact. For a closed enclosure, there is no direct air path or vacuum path from the at least a portion of the copper contact that is connected to the movable contact to the area outside the body.
In an example, the body is configured to form a closed housing relative to a portion of the movable contact to which the portion of the copper contact is connected. For a closed housing, there is no direct air path or vacuum path from the portion of the movable contact to which the portion of the copper contact is connected to the region outside the body.
In this way, electrical breakdown is prevented, since there is no direct path from the parts inside the heat sink to the outside of the heat sink.
In an example, the body includes a central conduit configured to allow a stem (stem) of the movable contact to protrude from the body.
In an example, the body includes one or more holes or recesses in an outer surface of the body.
In an example, the one or more holes or recesses do not connect the outer surface of the body to the inner surface of the body.
In an example, one or more of the holes or recesses extend from one portion of the outer surface of the body to another portion of the outer surface of the body.
Thus, these holes or recesses are in effect open tubes, air or barrier gas (such as air plus or SF 6 ) Through these tubes from a portion of the outer surface into the body of the heat sink and out of the outer surface to cool the heat sink without enteringThis is true in the interior of the heat sink, with respect to its inner surface.
In an example, the corners and edges of the body are rounded.
In an example, the radius of curvature of the substantially cylindrical shape is selected such that, in operation, the electric field strength at the at least one third outer surface is minimized below the electric field strength of the electrical breakdown.
Thus, by having a correspondingly shaped rounded outer surface of the heat sink, electrical breakdown is mitigated.
In this way, the problem of the copper connection is associated with electrical breakdown caused by the sharp edges of the thin flexible copper used, which is alleviated by enclosing the copper connection by a housing connected to and surrounding the copper connection, which then in effect provides a combined feature with no sharp edges anymore. At the same time, the housing acts as a heat sink to cool the copper connection.
In a second aspect, a circuit breaker and a dielectric shield heat sink are provided, the dielectric heat sink comprising a body. The body is mounted around the movable contact of the circuit breaker and around the portion of the copper contact connected to the movable contact. The body directly contacts at least a portion of the copper contact that is connected to the movable contact.
In an example, the dielectric shield heat spreader is made of a conductive material.
In an example, the conductive material is aluminum.
In an example, the conductive material is copper.
In an example, the circuit breaker is a vacuum interrupter.
In an example, the body surrounds the at least a portion of the copper contact that is connected to the movable contact.
In an example, the body forms a dielectric enclosed housing.
In an example, the at least a portion of the body connected to the movable contact relative to the copper contact forms a dielectrically enclosed housing.
In an example, the body forms a dielectric closed housing with respect to the portion of the movable contact to which the portion of the copper contact is connected.
In an example, at least a portion of the body connected to the movable contact with respect to the copper contact forms a closed housing. For a closed enclosure, there is no direct air path or vacuum path from the at least a portion of the copper contact that is connected to the movable contact to the area outside the body.
In an example, the body forms a closed housing with respect to the portion of the movable contact to which the portion of the copper contact is connected. For a closed housing, there is no direct air path or vacuum path from the portion of the movable contact to which the portion of the copper contact is connected to the region outside the body.
In an example, the body includes a central conduit that allows the stem of the movable contact to protrude from the body.
In an example, the body includes one or more holes or recesses in an outer surface of the body.
In an example, the one or more holes or recesses do not connect the outer surface of the body to the inner surface of the body.
In an example, one or more of the holes or recesses extend from one portion of the outer surface of the body to another portion of the outer surface of the body.
In an example, the corners and edges of the body are rounded.
In an example, the radius of curvature of the substantially cylindrical shape is selected such that, in operation, the electric field strength at the at least one third outer surface is minimized below the electric field strength of the electrical breakdown.
In an example, the ribbed surface includes fins extending in an axial direction.
In a third aspect, there is provided a medium or high voltage switchgear comprising at least one dielectric shielded heat sink according to the first aspect.
The above aspects and examples will become apparent from and elucidated with reference to the embodiments described hereinafter.
Drawings
Exemplary embodiments will be described hereinafter with reference to the following drawings:
fig. 1 shows an example of a dielectric shield heat sink mounted to a movable contact of a circuit breaker; and
figure 2 shows an isometric view of an example of a dielectric shield heat sink mounted to a movable contact of a circuit breaker.
Detailed Description
Fig. 1-2 relate to a dielectric shield heat sink, a circuit breaker and a dielectric shield heat sink, and a medium or high voltage switching device.
In an example, the dielectric shield heat sink 10 includes a body 20. The body of the dielectric shield heat sink is configured to be mounted around the movable contact 30 of the circuit breaker and around the portion 40 of the copper contact 50 connected to the movable contact. The body of the dielectric shield heat sink is configured to directly contact at least a portion of the copper contact that is connected to the movable contact.
In an example, the dielectric shield heat spreader is made of a conductive material.
In an example, the conductive material is aluminum.
In an example, the conductive material is copper.
According to an example, the body of the dielectric shield heat sink is configured to enclose the at least a portion of the copper contact connected to the movable contact.
According to an example, the body of the dielectric shield heat sink is configured to form a dielectrically enclosed housing.
According to an example, the body of the dielectric shield heat sink is configured to form a dielectrically enclosed housing with respect to the at least a portion of the copper contact connected to the movable contact.
According to an example, the body of the dielectric shield heat sink is configured to form a dielectrically enclosed housing with respect to a portion of the movable contact to which the portion of the copper contact is connected.
According to an example, the body of the dielectric shield heat sink is configured to form a closed housing with respect to at least a portion of the copper contact connected to the movable contact. With respect to the closed housing, there is no direct air path or vacuum path from the at least a portion of the copper contact connected to the movable contact to the area outside the body.
According to an example, the body of the dielectric shield heat sink is configured to form a closed housing with respect to a portion of the movable contact to which the portion of the copper contact is connected. With respect to the closed housing, there is no direct air path or vacuum path from the portion of the movable contact to which the portion of the copper contact is connected to the region outside the body.
According to an example, the body of the dielectric shield heat sink comprises a central conduit 60 configured to allow the stem 70 of the movable contact to protrude from the body.
According to an example, the body of the dielectric shield heat sink includes one or more holes or recesses 80 in an outer surface of the body.
According to an example, the one or more holes or recesses do not connect the outer surface of the body to the inner surface of the body.
According to an example, one or more of the holes or recesses extend from one portion of the outer surface of the body to another portion of the outer surface of the body.
According to an example, corners and edges of the body of the dielectric shield heat sink are rounded.
According to an example, the radius of curvature of the substantially cylindrical shape is selected such that, in operation, the electric field strength at the at least one third outer surface is minimized below the electric field strength of the electrical breakdown.
In the example, the circuit breaker has been fitted with a dielectric shield heat sink 10. The dielectric shield heat sink includes a body 20. The body of the dielectric shield heat sink is mounted around the movable contact 30 of the circuit breaker and around the portion 40 of the copper contact 50 connected to the movable contact. The body of the dielectric shield heat sink directly contacts at least a portion of the copper contact that is connected to the movable contact.
Such direct contact involves direct thermal and electrical contact, and obviously there may be an intermediate electrical/thermal medium, such as an intermediate sheet or gel, between the body and the copper connection.
In an example, the dielectric shield heat spreader is made of a conductive material.
In an example, the conductive material is aluminum.
In an example, the conductive material is copper.
In an example, the circuit breaker is a vacuum interrupter.
In an example, the body surrounds the at least a portion of the copper contact that is connected to the movable contact.
In an example, the body of the dielectric shield heat sink forms a dielectrically enclosed housing.
In an example, the at least a portion of the body of the dielectric shield heatsink opposite the portion of the copper contact connected to the movable contact forms a dielectrically enclosed housing.
In an example, the body forms a dielectric closed housing with respect to the portion of the movable contact to which the portion of the copper contact is connected.
In an example, the body of the dielectric shield heat sink forms a closed enclosure with respect to at least a portion of the copper contact that is connected to the movable contact. With respect to the closed housing, there is no direct air path or vacuum path from the at least a portion of the copper contact connected to the movable contact to the area outside the body.
In an example, the body forms a closed housing with respect to the portion of the movable contact to which the portion of the copper contact is connected. With respect to the closed housing, there is no direct air path or vacuum path from the portion of the movable contact to which the portion of the copper contact is connected to the region outside the body.
In the example, the body of the dielectric shield heat sink includes a central conduit 60 that allows the stem 70 of the movable contact to protrude from the body.
In an example, the body includes one or more holes or recesses 80 in an outer surface of the body.
In an example, the one or more holes or recesses do not connect the outer surface of the body to the inner surface of the body.
In an example, one or more of the holes or recesses extend from one portion of the outer surface of the body to another portion of the outer surface of the body.
In an example, the corners and edges of the body are rounded.
In an example, the radius of curvature of the substantially cylindrical shape is selected such that, in operation, the electric field strength at the at least one third outer surface is minimized below the electric field strength of the electrical breakdown.
In an example, the ribbed surface includes fins extending in an axial direction.
Thus, the medium or high voltage switching device may comprise at least one dielectric shielding heat sink as described above.
Thus, a closed heat sink has been designed so that it can function as an electrical shield for the sharp edges of the copper laminations used as contacts, and additionally as a dielectrically optimized heat sink with large rounded edges and corners on the outside to incur an active area (art area) of the circuit breaker, such as a pole section. The new heat sink may be retrofitted to an existing circuit breaker or the circuit breaker may be manufactured with such a heat sink as part of an overall heat sink embodiment.
From a dielectric point of view, the heat sink is closed and it has no open holes extending from the inside to the outside. The exterior of the heat sink has holes for cooling and the exterior has edges and corners of large radius without sharp edges. The heat sink is then placed around the movable contacts of the vacuum interrupter/circuit breaker and around the flexible copper connection in the form of a laminate. It works as a dielectric shield for the sharp edges of the copper connector and is in direct contact with the copper connector where it connects to the movable contact and serves to cool this area.
While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. The invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the dependent claims.

Claims (15)

1. A dielectric shield heat sink (10), the dielectric shield heat sink comprising:
a body (20);
wherein the body is configured to be mounted around a movable contact (30) of a circuit breaker and around a portion (40) of a copper contact (50) connected to the movable contact;
wherein the body is configured to directly contact at least a portion of the copper contact that is connected to the movable contact.
2. The dielectric shield heat sink of claim 1, wherein the body is configured to enclose the at least a portion of the copper contact that is connected to the movable contact.
3. The dielectric shielded heatsink of any one of claims 1-2, wherein the body is configured to form a dielectrically enclosed housing.
4. The dielectric shield heatsink of claim 3, wherein the body is configured to form a dielectrically enclosed housing relative to the at least a portion of the copper contact connected to the movable contact.
5. The dielectric shield heatsink of any one of claims 3-4, wherein the body is configured to form a dielectrically enclosed housing relative to a portion of the movable contact to which the portion of the copper contact is connected.
6. According to claim 1The dielectric shield heat sink of any of claims 5, wherein the body is configured to form a closed enclosure with respect to at least a portion of the copper contact connected to the portion of the movable contact, wherein for the closed enclosure there is no direct air path or area such as AirPlus or SF from the at least a portion of the copper contact connected to the portion of the movable contact to outside the body 6 Such as an isolated gas path or a vacuum path.
7. The dielectric shield heatsink of any one of claims 1-6, wherein the body is configured to form a closed enclosure relative to a portion of the movable contact to which the portion of the copper contact is connected, wherein for the closed enclosure there is no direct air path or vacuum path from the portion of the movable contact to which the portion of the copper contact is connected to an area outside the body.
8. The dielectric shielded heatsink of any one of claims 1-7, wherein the body comprises a central conduit (60) configured to allow a stem (70) of a movable contact to protrude from the body.
9. The dielectric shielded heat sink according to any of claims 1 to 8, wherein the body comprises one or more holes or recesses (80) in an outer surface of the body.
10. The dielectric shield heat sink of claim 9, wherein the one or more holes or recesses do not connect the outer surface of the body to an inner surface of the body.
11. The dielectric shield heatsink of any one of claims 9 to 10, wherein one or more of the holes or recesses extend from one portion of the outer surface of the body to another portion of the outer surface of the body.
12. The dielectric shield heatsink of any one of claims 1-11, wherein corners and edges of the body are rounded.
13. The dielectric shield heat sink of claim 12, wherein the radius of curvature of the substantially cylindrical shape is selected such that, in operation, the electric field strength at the at least one third outer surface is minimized below the electric field strength of electrical breakdown.
14. A circuit breaker and dielectric shield heat sink (10), the dielectric heat sink comprising:
a body (20);
wherein the body is mounted around a movable contact (30) of the circuit breaker and around a portion (40) of a copper contact (50) connected to the movable contact;
wherein the body directly contacts at least a portion of the copper contact that is connected to the movable contact.
15. Medium or high voltage switchgear comprising at least one dielectric shielding heat sink according to any of claims 1 to 13.
CN202310661372.8A 2022-06-08 2023-06-06 Dielectric shielding radiator Pending CN117198782A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22177901.0 2022-06-08
EP22177901.0A EP4290547A1 (en) 2022-06-08 2022-06-08 Dielectric shielding heat sink

Publications (1)

Publication Number Publication Date
CN117198782A true CN117198782A (en) 2023-12-08

Family

ID=81984841

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310661372.8A Pending CN117198782A (en) 2022-06-08 2023-06-06 Dielectric shielding radiator

Country Status (2)

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EP (1) EP4290547A1 (en)
CN (1) CN117198782A (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5753875A (en) * 1996-10-15 1998-05-19 Eaton Corporation Heat sink for contact stems of a vacuum interrupter and a vacuum interrupter therewith
EP1326262A1 (en) * 2001-12-21 2003-07-09 Siemens Aktiengesellschaft Pole armature
DE102006041377B3 (en) * 2006-08-29 2007-12-27 Siemens Ag Armature for circuit breaker, has connecting unit made of material with high electrical conductivity, and cooling body made of material with high thermal conductivity, where cooling body encloses connecting unit in form-fit manner
DE102009020152B3 (en) * 2009-05-06 2010-12-23 Siemens Aktiengesellschaft Isolierstoffgehäuse for receiving a vacuum interrupter and solid-insulated switch pole
DE102017217167A1 (en) * 2017-09-27 2019-03-28 Siemens Aktiengesellschaft Bounce suppression for switch poles with vacuum switches
EP3595105B1 (en) * 2018-07-13 2024-01-24 ABB Schweiz AG A heat sink for a high voltage switchgear

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Publication number Publication date
EP4290547A1 (en) 2023-12-13

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