EP3780056A1 - Élément isolant de ventilation pour unités d'interrupteur - Google Patents

Élément isolant de ventilation pour unités d'interrupteur Download PDF

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Publication number
EP3780056A1
EP3780056A1 EP19192095.8A EP19192095A EP3780056A1 EP 3780056 A1 EP3780056 A1 EP 3780056A1 EP 19192095 A EP19192095 A EP 19192095A EP 3780056 A1 EP3780056 A1 EP 3780056A1
Authority
EP
European Patent Office
Prior art keywords
ventilating
housing
insulating member
interrupter
interrupter unit
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
EP19192095.8A
Other languages
German (de)
English (en)
Inventor
Dhananjay AWATE
Kapil Bavikar
Andy HAUER
Jan Lange
Philipp Last
Martin Müller
Namitkumar SHELAR
Saurabh Shrivastava
Bhoopender Singh
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP19192095.8A priority Critical patent/EP3780056A1/fr
Priority to CN202010818637.7A priority patent/CN112397338A/zh
Publication of EP3780056A1 publication Critical patent/EP3780056A1/fr
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
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/52—Cooling of switch parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/52—Cooling of switch parts
    • H01H2009/526—Cooling of switch parts of the high voltage switches
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings

Definitions

  • the present disclosure relates to switching devices such as circuit breakers. More particularly, the present disclosure relates to a ventilating insulating member for interrupter units of circuit breakers.
  • a switching device such as a circuit breaker mainly includes a switching module formed from one or more function-oriented units including a base module unit, a pole module unit and a drive module unit.
  • the pole module unit includes an interrupter unit such as a vacuum interrupter comprising a stationary member and a movable member.
  • circuit breakers are switches used to protect electrical circuitry connected thereto from damage due to overload, by their automatic operation leading to an interruption of the current flowing therethrough.
  • Vacuum circuit breakers typically have a pair of electrical switching contacts arranged inside a vacuum chamber. Vacuum circuit breakers interrupt current by opening of these switching contacts in vacuum. Vacuum circuit breakers are an essential component especially in the medium voltage electrical protection equipment. For high voltage applications interrupter units might be filed with gas such as SF6 for both insulation and interruption.
  • FIG 1A illustrates a sectional elevation view of a vacuum interrupter 100 according to the state of the art.
  • the vacuum interrupter 100 comprises a housing 101 comprising a ceramic housing 101A and a metallic housing 101B rigidly attached to one another.
  • the housing 101 houses a metallic vapour shield 102 there-within.
  • the metallic vapour shield 102 in turn houses the electrical contacts 103A, 103B, that is, a fixed contact 103A rigidly connected to a fixed contact stem 107A and a moving contact 103B operably connected to a moving contact stem 107B via bellows 104 that allow movement of the moving contact 103B.
  • a moving contact guide 106 guides the movement of the moving contact 103B with help of the bellows 104.
  • the electrical contacts 103A and 103B physically separate in a vacuum chamber defined within the ceramic housing 101A.
  • the metallic vapour shield 102 and the ceramic housing 101A are connected with each other in a leak proof manner so as to maintain vacuum inside the vacuum interrupter 100.
  • the metallic housing 101B and the ceramic housing 101A are connected to one another in a leakproof manner.
  • the metallic vapour shield 102 and the ceramic housing 101A as well as the metallic housing 101B and the ceramic housing 101A are joined via a process of brazing which leads to formation of solder edges (not shown) in the contact areas 105A and 105B, where the metallic vapour shield 102 and the ceramic housing 101A and/or the metallic housing 101B and the ceramic housing 101A form a physical joint there-between.
  • solder edges although very small in size typically assume sharp edges which result in high electrical field strengths. In consequence, these solder edges when formed across vacuum interrupters 100, might lead to unwanted flashovers and risks posed to equipment as well as human life if dieletric distances are small.
  • FIG 1B illustrates a perspective view of a vacuum interrupter 100 according to state of the art.
  • the vacuum interrupter 100 has contact areas 105A and 105B along its body on which the solder edges (not shown) are formed due to a physical connection made during aforementioned construction of the vacuum interrupter 100. These solder edges typically form in the areas 105A lying towards distal ends 108A and 108B of the vacuum interrupter 100. However, they may also form along surfaces 105B where the metallic housing 101B and the ceramic housing 101A are physically connected with one another.
  • an object of the present invention to provide an interrupter unit suitable for air insulated as well as gas insulated applications, that addresses the problems arising from the solder edge formation, in a time-effective, design-effective and cost-effective manner.
  • the interrupter unit disclosed herein achieves the aforementioned object by a ventilating insulating member physically disposable on the housing accommodating at least one of the contact areas and therefore, the solder edges, thereby, precluding aforementioned problems arising due to formation of the solder edges.
  • interrupter unit refers to a switching unit having electrical contacts that make or break a circuit to allow or interrupt current flow there-between.
  • the interrupter unit is a vacuum interrupter unit which separates its electrical contacts in vacuum which has maximal dielectric strength.
  • the interrupter unit comprises a housing.
  • the housing includes a non-metallic housing such as a ceramic housing or a glass housing, and a metallic housing, in contact with one another forming one or more contact areas therebetween.
  • contact areas refer to physical points of contact between two dissimilar material components of the interrupter unit. For example, contact areas are points of contact between the ceramic housing and the metallic housing or between the ceramic housing and the metallic vapor shield shielding electrical contacts of the interrupter unit, placed inside the housing.
  • the interrupter unit comprises a ventilating insulating member physically disposable on the housing accommodating at least one of the contact areas.
  • ventilation insulating member refers to a layer having an insulating material therein and configured so as to cover one or more of the contact areas while providing ventilation at least partially to the one or more contact areas.
  • the insulating ventilating member is configured as an auto-shrinkable cap which has a circumference lesser than a circumference of the housing of the interrupter unit such that when the insulating ventilating member is stretched and aligned on the housing to cover one or more of the contact areas and is released it automatically shrinks on the contact area.
  • the ventilating insulating member comprises protrusions and/or indentations along an inner surface of the ventilating insulating member.
  • the ventilating insulating member comprises orifices along an inner surface of the ventilating insulating member. These protrusions, indentations, and/or orifices are provided, for example, in form of ribs, grooves, holes, corrugations, and/or a combination thereof, along the inner surface of the ventilating insulating member so as to allow formation of a gap between the housing and the insulating ventilating member that allows air to escape therethrough.
  • the protrusions, indentations, and/or orifices are configured in one of multiple aspects involving but not limited to a vertical alignment with respect to the housing, a horizontal alignment with respect to the housing, an oblique alignment with respect to the housing, and/or a combination thereof.
  • a number of the protrusions, indentations, and/or orifices, and a physical alignment thereof is determined based on an amount of grip to be exerted onto the housing, a construction of the interrupter unit, and ensuring effective removal of air through the ventilating insulating member.
  • the ventilating properties of the insulating ventilating member allows it to be used in gas insulated applications.
  • the vacuum interrupter unit is immersed and retained under pressure in a container filled with an insulating gas.
  • the container is evacuated and air from within the container is drawn, so as to create vacuum, and finally the container is filled up with insulating gas.
  • the ventilating properties of the insulating ventilating member preclude retention of air under the ventilating insulating member while air is being drawn out of the container.
  • this ventilating property also allows the insulating ventilating member to maintain its position upon the housing even during changes in the air pressure during evacuation. Furthermore, the ventilating property also ensures complete removal of air the container.
  • the ventilating insulating member is suited for gas-insulated application with vacuum tubes used in gas-containers of gas insulated switchgears
  • the ventilating insulating member is flexibly disposable on the housing so as to accommodate one or more of the contact areas.
  • the insulating ventilating member is configured as an annular member covering only the contact area(s).
  • the insulating ventilating member extends to cover more than one contact area.
  • this aspect allows coverage of more than one contact area and therefore, solder edges that may be formed along various contact areas of the ceramic housing and the metallic housing.
  • the ventilating insulating member is made of an elastomer material such as silicone.
  • the insulating ventilating member is made only of elastomer.
  • the insulating ventilating member is made of a composite material having elastomer.
  • the insulating ventilating member is made of a graded material having elastomer, to cover one or more of the contact areas.
  • the switching device is, for example, a circuit breaker arrangement.
  • the circuit breaker arrangement comprises a pole module unit and a drive module unit operably connected to the pole module unit.
  • the pole module unit comprises the aforementioned interrupter unit.
  • the circuit breaker arrangement is a vacuum circuit breaker.
  • a switchgear arrangement comprising a cable compartment, a busbar compartment, and a switching compartment having the aforementioned circuit breaker arrangement including the interrupter unit.
  • the switchgear arrangement is an air-insulated switchgear, a vacuum insulated switchgear or a gas insulated switchgear.
  • FIG 2A illustrates a perspective view of a vacuum interrupter 200 having ventilating insulating caps 201 each covering a contact area 105A shown in FIG 1B , according to an embodiment of the insulating ventilating member disclosed herein.
  • the ventilating insulating caps 201 are flexibly positioned, that is, expanded and/or stretched over the ceramic housing 101A and positioned so as to cover the contact areas 105A, thereby, precluding any affects of the solder edges (not shown) formed in these contact areas 105A.
  • FIG 2B illustrates a perspective view of a vacuum interrupter 200 having an ventilating insulating cap 201 covering more than one contact areas 105A and 105B shown in FIG 1B , according to an embodiment of the insulating ventilating member disclosed herein.
  • the ventilating insulating cap 201 as shown in FIG 2B is configured so as to flexibly expand over the ceramic housing 101A covering the contact area 105A and extending along the ceramic housing 101A up till the metallic housing 101B so as to cover the contact area 105B.
  • This arrangement of the ventilating insulating cap provides additional coverage of the solder edges (not shown) formed in various contact areas 105A and 105B.
  • FIG 3 illustrates an ventilating insulating cap 201, according to an embodiment of the insulating ventilating member disclosed herein.
  • the ventilating insulating cap 201 is a circular shaped cap and/or a sleeve configured to suit the vacuum interrupter 200 shown in FIGS 2A and 2B .
  • the ventilating insulating cap 201 is flexibly positioned on the ceramic housing 101A such that a bottom surface 201B of the ventilating insulating cap 201 is in a direct physical contact with the distal end 108A or 108B of the vacuum interrupter 200 shown in FIG 2A , and an inner surface 201C of the ventilating insulating cap 201 is completely disposed against the contact area(s) 105A and/or 105B and at least partially disposed against the ceramic housing 101A.
  • the ventilating insulating cap 201 includes protrusions, that is, ribs 201A along the inner surface 201C extending till the bottom surface 201B to allow a gap to be maintained throughout a height H of the ventilating insulating cap 201 thereby, enabling air to escape therefrom effectively.
  • FIG 4 illustrates a circuit breaker arrangement 400 having a vacuum interrupter 200 shown in FIG 2A or FIG 2B .
  • the circuit breaker arrangement 400 comprises a pole module unit 401 and a drive module unit 402 operably connected to the pole module unit 401 via pole insulators 403 and an insulating coupler 404.
  • the pole module unit 401 comprises the aforementioned vacuum interrupter 200.
  • the circuit breaker arrangement 400 is a vacuum circuit breaker.
  • FIG 5 illustrates a switchgear arrangement 500 having the circuit breaker arrangement 400 shown in FIG 4 including the vacuum interrupter 200.
  • the switchgear arrangement 500 comprises a cable compartment 501, a switching compartment 502 having the aforementioned circuit breaker arrangement 400 including the interrupter unit 200 shown in FIG 4 , and a busbar compartment 503 all coupled with one another.

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP19192095.8A 2019-08-16 2019-08-16 Élément isolant de ventilation pour unités d'interrupteur Pending EP3780056A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19192095.8A EP3780056A1 (fr) 2019-08-16 2019-08-16 Élément isolant de ventilation pour unités d'interrupteur
CN202010818637.7A CN112397338A (zh) 2019-08-16 2020-08-14 用于断续器单元的通风绝缘构件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19192095.8A EP3780056A1 (fr) 2019-08-16 2019-08-16 Élément isolant de ventilation pour unités d'interrupteur

Publications (1)

Publication Number Publication Date
EP3780056A1 true EP3780056A1 (fr) 2021-02-17

Family

ID=67659094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19192095.8A Pending EP3780056A1 (fr) 2019-08-16 2019-08-16 Élément isolant de ventilation pour unités d'interrupteur

Country Status (2)

Country Link
EP (1) EP3780056A1 (fr)
CN (1) CN112397338A (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689305A1 (fr) * 1992-03-27 1993-10-01 Alsthom Gec Module de coupure triphase et application notamment à un disjoncteur moyenne tension debrochable.
JP2009205801A (ja) * 2008-02-26 2009-09-10 Hitachi Ltd 真空開閉器
JP2012239246A (ja) * 2011-05-10 2012-12-06 Hitachi Ltd モールドスイッチ及びこれを搭載した装置
JP2014212009A (ja) * 2013-04-18 2014-11-13 株式会社東芝 樹脂モールド真空バルブ
JP2018060697A (ja) * 2016-10-06 2018-04-12 三菱電機株式会社 真空バルブ

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003272492A (ja) * 2002-01-11 2003-09-26 Mitsubishi Electric Corp 真空スイッチ管
KR101063137B1 (ko) * 2006-03-27 2011-09-07 미쓰비시덴키 가부시키가이샤 스위치기어와 그 제조방법
CN201075360Y (zh) * 2007-07-05 2008-06-18 大全集团有限公司 断路器绝缘筒
EP2407990A1 (fr) * 2010-07-15 2012-01-18 ABB Technology AG Élément de pôle de disjoncteur et procédé de production d'un tel élément de pôle
CN103329233B (zh) * 2010-10-01 2016-01-27 Abb技术有限公司 真空断续器和改进真空断续器的电压耐受性的方法
EP2624273B1 (fr) * 2012-02-03 2015-04-01 ABB Technology AG Interrupteur sous vide avec zones de transition entre des pièces de boîtier métallique et pièces de boîtier en céramique couvertes par un matériau isolant
FR3017486B1 (fr) * 2014-02-07 2017-09-08 Schneider Electric Ind Sas Deflecteur pour ampoule a vide surmoulee
RU2016140649A (ru) * 2014-03-17 2018-04-17 Сешерон СА Вакуумный выключатель (варианты)
EP2996131B1 (fr) * 2014-09-12 2020-08-05 ABB Schweiz AG Pôle d'interrupteur à vide pour application dans un environnement sous haute pression
EP3018683A1 (fr) * 2014-11-06 2016-05-11 ABB Technology AG Interrupteur à vide pour utilisation à basse, moyenne ou haute tension, pour une application de pression de l'environnement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689305A1 (fr) * 1992-03-27 1993-10-01 Alsthom Gec Module de coupure triphase et application notamment à un disjoncteur moyenne tension debrochable.
JP2009205801A (ja) * 2008-02-26 2009-09-10 Hitachi Ltd 真空開閉器
JP2012239246A (ja) * 2011-05-10 2012-12-06 Hitachi Ltd モールドスイッチ及びこれを搭載した装置
JP2014212009A (ja) * 2013-04-18 2014-11-13 株式会社東芝 樹脂モールド真空バルブ
JP2018060697A (ja) * 2016-10-06 2018-04-12 三菱電機株式会社 真空バルブ

Also Published As

Publication number Publication date
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