EP1961029A1 - Vacuum interrupter - Google Patents
Vacuum interrupterInfo
- Publication number
- EP1961029A1 EP1961029A1 EP05825892A EP05825892A EP1961029A1 EP 1961029 A1 EP1961029 A1 EP 1961029A1 EP 05825892 A EP05825892 A EP 05825892A EP 05825892 A EP05825892 A EP 05825892A EP 1961029 A1 EP1961029 A1 EP 1961029A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control electrode
- vacuum interrupter
- power supply
- shield
- contact
- 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
Links
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
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
-
- 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
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
- H01H2033/66284—Details relating to the electrical field properties of screens in vacuum 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
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
- H01H2033/66292—Details relating to the use of multiple screens in vacuum switches
Definitions
- the invention relates to a vacuum interrupter with a tubular insulating body and a contact system of a moving contact and a fixed contact, which are each connected to vacuum-tight led out of the vacuum interrupter power supply pin, and a galvanically connected to the fixed contact power supply pin control electrode and arranged on the insulating conductive , the control electrode in an axial direction overlapping vapor shield.
- Such a vacuum interrupter is known from DE 92 11 970 Ul.
- the vacuum interrupter disclosed therein comprises a vapor shield which is held on a metallic intermediate ring on the insulating body of the vacuum interrupter and axially overlaps a control electrode galvanically connected to a flange, so that a plasma barrier to the ceramic insulator is formed by the vapor shield, thereby providing vapor deposition of the insulating body is prevented during switching operations with an arc.
- the control electrodes and the vapor shield serve to control the potential in the vacuum interrupter so as to improve the dielectric insulating properties.
- the object of the present invention is to design a vacuum interrupter of the type mentioned in the introduction, which has improved dielectric insulation properties.
- this object is achieved in that the control electrode terminates in the manner of a torus in the overlap region with the vapor shield, the steam shield is retracted inwardly in accordance with the torus, and the fixed contact power supply pin is constricted to the contour of the vapor shield and the constriction is arranged so that the retracted portion of the vapor shield extends around the constriction.
- the dielectric strength is improved in an advantageous manner in the fixed contact power supply bolt, which additionally constricted by the torus corresponding inwardly drawn vapor shield and the contour of the vapor shield Solid contact power supply pin and the arrangement of the constriction is provided for a homogeneous field profile.
- the invention further relates to a vacuum interrupter with a rohrformigen insulating body and a contact system of a moving contact and a fixed contact, which are each connected to the vacuum-tight out of the vacuum interrupter power supply bolts, and a galvanic with the control electrode connected to the moving contact power supply pin, and a conductive screen arranged on the insulating body and overlapping the control electrode in an axial direction.
- control electrode runs in the overlap region with the steam shield in the manner of a torus;
- the steam shield is according to the torus inside retracted, and the moving contact power supply pin has a sidecut such that the retracted portion of the vapor shield extends around the waist in an open position of the contact system.
- the inventively provided, in the overlap region with the steam shield in the manner of a torus expiring control electrode is advantageously improves the dielectric strength in the region of the Be. Membership-Stromzu operationsbolzens, which additionally by the torus inwardly retracted in the vapor shield and the waist of the BewegCount- Power supply bolt for a homogeneous field profile is provided with open contact system.
- the sidecut of the moving contact power supply pin corresponds in its contour to that of the inwardly drawn-in vapor shield. Such a sidecut provides an easy way to form a homogeneous field profile when the contact system is open.
- the sidecut of the moving contact power supply pin in the axial direction away from the moving contact is extended by at most one length corresponding to a moving distance of the moving contact.
- control electrode extends from the insulating body in the direction of the vapor shield.
- the torus be formed with a larger radius.
- the steam shield is made of stainless steel.
- Stainless steel is an advantageous material because, with sufficient conductivity, the induction of eddy currents in the vapor shield is reduced.
- FIG. 1 shows a cross-sectional view in the region of the fixed contact power supply bolt of a vacuum interrupter according to the invention.
- FIG. 2 shows a further cross-sectional view in the region of the moving contact power supply bolt of a vacuum interrupter according to the invention.
- FIG. 1 shows a vacuum interrupter 1 with a tubular insulating body which comprises hollow cylindrical ceramic insulators 2 and 3 and is closed in a vacuum-tight manner on one end face by means of a metallic flange 4.
- a fixed contact power supply pin 5 which is connected outside the vacuum tube with a connecting line figuratively not shown, is passed through the vacuum-tight vacuum through the flange 4 and inside the vacuum interrupter 1 has a fixed contact 6 of a contact system 7.
- the contact system 7 further comprises a moving contact 8, which is also connected by means of a power supply pin 9, with a further connecting line, not shown figuratively outside of the vacuum tube 1.
- the moving contact 8 is arranged vacuum-tight and movable on the vacuum tube, so that via a figuratively not shown Antriebsvor ⁇ direction of the moving contact 8 in the direction of the movement arrow A to the fixed contact 6 out or away from the fixed contact 6 can be moved to form a conductive connection or disconnect accordingly.
- a control electrode 10 is arranged, which has a galvanic connection with the flange 4.
- the free end 11 of the control electrode 10 in the interior of the vacuum tube 1 is curved in the direction of the ceramic insulator 2 in the manner of a torus.
- a vapor shield 12 made of a conductive material, such as stainless steel, insulating secured, so that the vapor shield 12 has no fixed potential.
- the free end 13 of the vapor shield 12 overlaps the control electrode 10 in the axial direction of the vacuum interrupter 1 and, in the region of overlap, has an indentation 14, which is arranged opposite a constriction 15 of the power supply pin 5.
- the constriction 15 of the power supply bolt 5, the intake 14 of the steam shield 12 and the torus-like curved free end 11 of the control electrode 10 are arranged lying in the axial direction of the vacuum interrupter 1 at the same height.
- the control electrode 10 is in galvanic connection via the metallic flange 4 to the power supply pin 5 and is therefore at the same potential as the power supply pin 5 of the fixed contact 6.
- the control electrode 10 thus serves to control the potential along the ceramic insulators.
- the vapor shield 12 serves as a plasma barrier to the ceramic in order to protect the ceramic insulators 2, 3 from vapor deposition during switching operations in which a current flows and possibly an arc is ignited.
- the vapor shield 12 is formed of a conductive material, and shaped such that occurring electric fields • inside the vacuum interrupter 1 are as homogeneous as possible.
- the power supply pin 5 therefore has the constriction 15 in the region in which the control electrode 10 has a toroidal curvature towards the ceramic insulator 2, and the vapor shield 12 likewise has a feeder 14, which in its geometry metric corresponds to the torus of the control electrode.
- the contour of the constriction 15 of the power supply pin 5 corresponds to the intake 14 of the steam shield 12. In such a constriction 15 and a corresponding feeder 14 ensures that the distances between the power supply pin 5 and steam shield 12 and X2 between 12 and vapor shield
- Control electrode 10 in the entire overlap region in about the same value, and in particular in the region of the constriction 15 and the distances between Xl 'between power supply pin 5 and intake 14 of the vapor shield 11 and X2 see between intake 14 of the vapor shield 12 and control electrode 10 also in about the values Xl and X2 correspond. Due to the insulating arrangement of the vapor shield 12, a potential of about half of the potential of the control electrode 10 and the power supply pin 5 is set on this. The inventive geometric arrangement with the constriction 15, the intake 14 of the vapor shield 12 and the toroidal curvature 11 of the control electrode 10 is ensured that the resulting electric field over the entire range as homogeneously as possible.
- the depth of the constriction 15 is chosen so that the total resistance of the tube increases only slightly.
- the dielectric isolation path is increased by a distance X3 corresponding to the depth of the constriction 15 of the power supply pin 5.
- FIG. 2 shows another view of the embodiment of the vacuum interrupter 1 with open contact system 7.
- the moving contact power supply pin 9 is led out by a metallic end plate 16 by means of a bellows 17 vacuum-tight and movable from the vacuum interrupter 1 and with a drive unit not shown figuratively for introducing coupled with a movement.
- a control electrode 18 is galvanically connected to the end plate 17 and terminates toroidally at its end 19.
- the free end 20 of the vapor shield 12 overlaps the control electrode 18 in the axial direction of the vacuum sleeve tube 1 and, in the overlapping region, has an indentation 21 inwardly, which is arranged opposite a sidecut 22 of the power supply pin 9.
- the waist 22 of the power supply pin 9, the feeder 21 of the vapor shield 12 and the torus-like arched free end 19 of the control electrode 18 are arranged in the axial direction of the vacuum interrupter 1 at the same height.
- the sidecut 22 of the moving contact power supply pin 9 is arranged so that it faces the feeder 21 of the vapor shield 12 when the contact system 7 of the vacuum interrupter 1 is open.
- the distances X5 between the power supply pin 9 and the vapor shield 12 or X4 between the vapor shield 12 and the control electrode 18 are approximately the same in the entire overlapping area, and especially in the area of the sidecut 22 Distances X5 'between power supply pin 9 and intake 21 of the steam shield 12 or X4' between intake 21 of the steam screen 12 and torus-like end 19 of the control electrode 18 also correspond approximately to the values X5 and X4.
- the depth X ⁇ of the sidecut 22 is also chosen so that the total resistance of the tube increases only insignificantly.
- the dielectric isolation distance is increased by a distance X6 corresponding to the depth of the sidecut 22 of the moving contact power supply pin 9.
- the sidecut 22 of the moving contact power supply pin 9 may also be formed extended in the direction of movement, for example by a length which corresponds to the nominal stroke of the vacuum interrupter and thus the moving distance of the moving contact.
- Such an elongated waist 22 ' is shown in dashed lines in Figure 2 and serves to achieve during a separation process of the contact system already a homogenization of the electric field.
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Cookers (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2005/002245 WO2007068218A1 (en) | 2005-12-12 | 2005-12-12 | Vacuum interrupter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1961029A1 true EP1961029A1 (en) | 2008-08-27 |
EP1961029B1 EP1961029B1 (en) | 2009-12-02 |
Family
ID=36660743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05825892A Not-in-force EP1961029B1 (en) | 2005-12-12 | 2005-12-12 | Vacuum interrupter |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080314874A1 (en) |
EP (1) | EP1961029B1 (en) |
CN (1) | CN101326606A (en) |
AT (1) | ATE450875T1 (en) |
DE (2) | DE112005003823A5 (en) |
WO (1) | WO2007068218A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008026799B4 (en) * | 2008-06-02 | 2010-04-15 | Siemens Aktiengesellschaft | Vacuum interrupter |
KR101520552B1 (en) * | 2010-07-07 | 2015-05-14 | 지멘스 엘티디 | An electrical isolator |
DE102016218385A1 (en) | 2016-09-23 | 2018-03-29 | Siemens Aktiengesellschaft | Insulating part with arched metal screen |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1190442A (en) * | 1967-02-20 | 1970-05-06 | Ass Elect Ind | Improvements relating to Vacuum Electric Switches and like Discharge Devices |
US4061894A (en) * | 1976-04-28 | 1977-12-06 | General Electric Company | Vacuum-type circuit interrupter with improved protection for bellows |
JPS5855609B2 (en) * | 1979-07-23 | 1983-12-10 | 株式会社明電舎 | Vacuum cutter |
US4665287A (en) * | 1985-11-08 | 1987-05-12 | General Electric Company | Shield assembly of a vacuum interrupter |
US5189270A (en) * | 1990-08-03 | 1993-02-23 | Hitachi, Ltd. | Contact structure for vacuum circuit breaker |
US5438174A (en) * | 1993-11-22 | 1995-08-01 | Eaton Corporation | Vacuum interrupter with a radial magnetic field |
-
2005
- 2005-12-12 CN CNA200580052280XA patent/CN101326606A/en active Pending
- 2005-12-12 US US12/096,971 patent/US20080314874A1/en not_active Abandoned
- 2005-12-12 DE DE112005003823T patent/DE112005003823A5/en not_active Withdrawn
- 2005-12-12 DE DE502005008656T patent/DE502005008656D1/en active Active
- 2005-12-12 AT AT05825892T patent/ATE450875T1/en not_active IP Right Cessation
- 2005-12-12 EP EP05825892A patent/EP1961029B1/en not_active Not-in-force
- 2005-12-12 WO PCT/DE2005/002245 patent/WO2007068218A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007068218A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101326606A (en) | 2008-12-17 |
DE502005008656D1 (en) | 2010-01-14 |
EP1961029B1 (en) | 2009-12-02 |
DE112005003823A5 (en) | 2008-11-27 |
ATE450875T1 (en) | 2009-12-15 |
WO2007068218A1 (en) | 2007-06-21 |
US20080314874A1 (en) | 2008-12-25 |
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