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
  • H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact 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
  • H01H33/662—Housings or protective screens
  • H01H33/66238—Specific bellows details
  • H01H2033/66246—Details relating to the guiding of the contact rod in vacuum switch belows

Definitions

• the invention relates to a vacuum switch.
• Vacuum switches are circuit breakers in which two switching contact elements that can be moved relative to one another are arranged in a vacuum interrupter in order to avoid or reduce a switching arc when the switching contact elements are separated.
• a movable switching contact element of a vacuum switch must be guided with as little play as possible in order not to tilt in relation to the other (usually stationary) switching contact element.
• the moveable switching contact element must be permanently electrically connected to a live component of the vacuum switch.
• the invention is based on the object of specifying a vacuum switch which is improved in particular with regard to the guidance of a movable switching contact element.
• a vacuum switch according to the invention comprises
• a base element designed as an electrically conductive hollow body with a cylindrical inner wall, into which an end section of the movable switching contact element, which is led out of the vacuum interrupter, protrudes, -
• An electrically conductive guide contact element which is firmly connected to the end portion of the movable switching contact element
• the guide rings and the current transmission element each extend annularly around the guide contact element and bear against the inner wall of the base element.
• a movable switching contact element of the vacuum interrupter is held by an electrically conductive guide contact element, which is guided over a number of guide rings on an inner wall of an electrically conductive base element.
• the guide contact element thereby enables the movable switching contact element to be guided via the guide rings on the base element.
• the fixed connection of the movable switching contact element to the guide contact element and the mutually spaced arrangement of the guide rings on the guide contact element advantageously allow the movable switching contact element to be guided with little play.
• the guide contact element is electrically conductively connected to the base element by a current transmission element and thus also enables a permanent electrical connection of the movable switching contact element to the base element.
• the guide rings are made from polytetrafluoroethylene.
• Polytetrafluoroethylene is a suitable material for the guide rings because it has a very low coefficient of friction and therefore good sliding properties and is also very temperature-resistant.
• the current transmission element has a structure made up of resiliently mounted electrically conductive contact lamellae. The resiliently mounted contact lamellae advantageously enable a simultaneously low-friction and reliable electrical connection between the current transmission element and the base element due to a large number of electrical contacts.
• the guide contact element is made of aluminum, copper, an aluminum alloy or a copper alloy. This advantageously enables high electrical conductivity of the guide contact element.
• the guide contact element has an essentially cylindrical outer wall with a first end region facing the vacuum interrupter, on which a first guide ring is arranged, and a second end region facing away from the vacuum interrupter, on which a second guide ring is arranged.
• a further embodiment of the vacuum switch according to the invention has a force transmission element which is connected to the end section of the movable switching contact element. This enables a drive force to be transmitted to the movable switching contact element in order to move the switching contact element and the guide contact element.
• vacuum switch runs the outer wall of Guide contact element around the end portion of the movable switch contact element and at least a portion of the power transmission element.
• the outer wall of the guide contact element expands towards the force transmission element, which allows the guide rings to be as far apart as possible and thereby reduces the play in guiding the guide contact element on the base element.
• the force transmission element is connected to the end section of the movable switching contact element by a threaded bolt.
• wedge lock washers can be provided, which are arranged between the end portion of the movable switching contact element and the force transmission element and through which the threaded bolt zen is guided. This enables a mechanically stable connection of the force transmission element to the movable switching contact element.
• the force transmission element is designed as a housing for a spring assembly. This enables the arrangement of a spring assembly in the force transmission element, with which a spring force can be exerted on the force transmission element and the second switching contact element in order to reliably close an electrical contact in the vacuum interrupter.
• the vacuum switch 1 comprises two electrically conductive base elements 3 , 5 spaced apart from one another, a vacuum interrupter 7 arranged between the base elements 3 , 5 and a mechanically rigid support element 9 which is connected to both base elements 3 , 5 .
• the supporting element 9 surrounds the vacuum interrupter 7 like a tube and without contact and is made of an insulating material.
• the vacuum interrupter 7 has a metal central area 17, two metal
• Vacuum tube end regions 19, 21 and two insulation regions 23, 25 The central area 17 has a larger diameter than the vacuum tube end areas 19 , 21 and the insulation areas 23 , 25 and is arranged between the insulation areas 23 , 25 .
• the insulation areas 23, 25 are each made of an electrically non-conductive material.
• a first vacuum tube end area 19 protrudes into a first base element 3 and adjoins a first insulation area 23 .
• the second vacuum tube end area 21 protrudes into the second base element 5 and adjoins the second insulation area 25 .
• Two electrically conductive switching contact elements 27 , 29 are arranged in the vacuum interrupter 7 .
• a first switching contact element 27 is firmly connected to the first vacuum tube end area 19 of the vacuum switching tube 7 .
• An end of the first switching contact element 27 that is led out of the vacuum interrupter 7 is connected to the first base element 3, for example by a screw connection (not shown).
• the vacuum interrupter 7 is connected to the first base element 3 .
• the second switch contact element 29 is relative to the first switch contact element 27 between a first switch position, in which the switch contact elements 27, 29 touch, and a second switch position shown in the figure, in which the switch contact elements 27, 29 are spaced apart are, movable .
• An end section 31 of the second switching contact element 29 is led out of the vacuum interrupter 7 through an opening in the second vacuum tube end region 21 .
• the base elements 3, 5 are each made of a metal, for example aluminum, or an alloy.
• the second base element 5 is designed as a hollow body with a cylindrical inner wall 33 , into which the end section 31 of the second switching contact element 29 , which is led out of the vacuum interrupter 7 , projects.
• the vacuum switch 1 also includes an electrically conductive guide contact element 35 , two guide rings 37 , 39 , an electrically conductive current transmission element 41 and a force transmission element 43 .
• the guide contact element 35 , the guide rings 37 , 39 and the power transmission element 41 serve to support and guide the second switch contact element 29 and to electrically connect the second switch contact element 29 to the second base element 5 .
• the force transmission element 43 serves to transmit a force from a drive (not shown) to the second switching contact element 29 in order to move the second switching contact element 29 and the guide contact element 35 .
• the guide contact element 35 comprises an area facing the vacuum interrupter 7 which is firmly connected to the end section 31 of the second switching contact element 29 , and an area extending away from the vacuum interrupter 7 and around the force transmission element 43 .
• the guide contact element 35 has an essentially cylindrical outer wall 45 with a first end region facing the vacuum interrupter 7, on which a first guide ring 37 is arranged, and a second end region facing away from the vacuum interrupter 7, on which the second guide ring 39 is arranged.
• the power transmission element 41 is between the two Guide rings 37 , 39 are arranged on the outer wall 45 of the guide contact element 35 .
• the guide rings 37 , 39 and the current transmission element 41 each run annularly around the guide contact element 35 in annular grooves 47 to 49 in the outer wall 45 of the guide contact element 35 and bear against the inner wall 33 of the second base element 5 .
• the guide contact element 35 is made of aluminum, copper, an aluminum alloy or a copper alloy, for example.
• the guide rings 37 , 39 are made of polytetrafluoroethylene, for example.
• the current transmission element 41 has, for example, a structure made up of resiliently mounted contact lamellae and is made, for example, of silver-plated copper-chromium-zirconium.
• the force transmission element 43 is connected to the end section 31 of the second switching contact element 29 by a threaded bolt 51 .
• the connection of the force transmission element 43 to the second switching contact element 29 is also secured by a wedge lock washer pair 53 which is arranged between the end section 31 of the second switch contact element 29 and the force transmission element 43 and through whose wedge lock washers the threaded bolt 51 is guided.
• the force transmission element 43 is designed as a housing for a spring assembly, with which a spring force can be exerted on the force transmission element 43 , the guide contact element 35 and the second switching contact element 29 .

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Push-Button Switches (AREA)
• High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=77774917

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Family Cites Families (3)

• 2020
  • 2020-09-14 DE DE102020211512.5A patent/DE102020211512A1/de active Pending
• 2021
  • 2021-09-02 EP EP21770228.1A patent/EP4173018A2/de active Pending
  • 2021-09-02 JP JP2023515707A patent/JP2023541869A/ja active Pending
  • 2021-09-02 WO PCT/EP2021/074272 patent/WO2022053392A2/de active Application Filing
  • 2021-09-02 CN CN202180062705.4A patent/CN116648768A/zh active Pending

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