EP3138113A1 - Avoiding incorrect orientations of a drive rod of a power switch - Google Patents
Avoiding incorrect orientations of a drive rod of a power switchInfo
- Publication number
- EP3138113A1 EP3138113A1 EP15728813.5A EP15728813A EP3138113A1 EP 3138113 A1 EP3138113 A1 EP 3138113A1 EP 15728813 A EP15728813 A EP 15728813A EP 3138113 A1 EP3138113 A1 EP 3138113A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive rod
- drive
- pole shell
- guiding
- vacuum interrupter
- 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
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
-
- 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
- H01H33/666—Operating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
-
- 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
- H01H33/666—Operating arrangements
- H01H2033/6667—Details concerning lever type driving rod arrangements
Definitions
- the invention relates to a circuit breaker having a vacuum interrupter accommodated in a pole shell, comprising a fixed contact and a moving contact and having an electrically insulating drive rod for initiating a drive movement of a switch drive into the moving contact for opening or closing the contact system of the vacuum interrupter. Moreover, the invention relates to a method for avoiding misalignment of a drive rod of a circuit breaker.
- a moving contact along a central axis of the vacuum interrupter is moved relative to a fixed contact.
- a switch drive provides a corresponding drive movement.
- To initiate the drive movement in the Bewegkon- contact pin of the vacuum interrupter is an electrically insulating trained drive rod which connects the switch drive with the vacuum interrupter. Both during assembly of the switch pole of the circuit breaker, as well as during its operation can lead to misalignment of this drive rod.
- An object of the present invention is to provide a particularly simple and at the same time inexpensive solution for avoiding misalignment of the drive rod.
- circuit breaker according to claim 1 or by a method according to claim 8.
- Advantageous embodiments of the invention are specified in the subclaims. The advantages and embodiments explained below in connection with the circuit breaker also apply mutatis mutandis to the method according to the invention and vice versa.
- the circuit breaker comprises a vacuum interrupter accommodated in a pole shell with a fixed contact and a moving contact, an electrically insulating drive rod for introducing a drive movement from a switch drive into the moving contact for opening or closing.
- the method according to the invention for avoiding misalignments of a drive rod of a circuit breaker is characterized in that the drive rod independently aligns itself axially in the pole shell. This self-alignment is done by means of a radially between the drive rod and the pole shell provided guiding and / or centering means which is connected to the drive rod.
- a basic idea of the invention is to provide a drive rod centering itself in the pole shell.
- the necessary for the self-alignment constructive means are attached to the drive rod itself.
- these structural means are attached exclusively to the drive rod itself, so that changes to the pole shell are not required.
- Lateral movements of the drive rod in the pole shell are prevented by guide rod and / or centering means mounted on the drive rod, which are positioned radially between the drive rod and the pole shell.
- This is preferably at least one suitable guiding and / or centering element.
- this element at at least one point along the longitudinal axis of the drive rod to such dimensions that tilting movements of the drive rod in the pole shell substantially excluded, but in any case are reduced to a minimum. In other words, this results in a self-axial alignment of the drive rod in the pole shell or in other words, a self-centering of the drive rod in the pole shell instead.
- the guide and / or centering element is preferably an annular flange which is adapted in its diameter to a cylindrical shape of the pole shell such that a more or less uniform, minimum annular gap is present when the drive rod is aligned precisely. That tilting movements are reduced to a minimum or a minimum annular gap is present means that an axial longitudinal movement of the drive rod and thus the proper functionality of the drive rod for transmitting a drive movement to the moving contact is not impaired by the guiding and / or centering However, beyond radial play of the drive rod does not exist or is limited as much as possible.
- the guiding and / or centering element is always adapted to the shape of the pole shell, more precisely to the contour of the inside of the housing of the Wegerpols.
- the element may also have a polygonal shape to be in a angular cross-section pole shell to prevent tilting of the drive rod.
- the guiding and / or centering means can be designed as individually manageable construction elements. In one embodiment of the invention, however, the guiding and / or centering means are not only attached to the drive rod, but a component, in particular an integral part of the drive rod. The guiding and / or centering means are then preferably integrally connected to the drive rod, in particular permanently connected to the generally cylindrical base body of the drive rod.
- the guide and / or centering means need not be provided continuously circumferentially on the drive rod be.
- the at least one guiding and / or centering element can not abut circumferentially on the inside of the pole shell. In such a case, it may, for. B. be sufficient if the drive rod has a guiding and / or centering element, which has an enlarged diameter only on two opposite sides.
- the pole shell is not performed circumferentially closed, a circumferential stop or guide surface for the guiding and / or centering so not available. In these latter cases, it is sufficient that at least one guiding and / or centering element according to the structural or functional needs for
- the drive rod is used not only for the mechanical connection of the vacuum interrupter, more precisely the moving contact of the vacuum interrupter, with the switch drive, but also for the isolation of the switch drive from the contact arrangement.
- the drive rod may have radially outwardly of the rod body outwardly facing ribs of insulating material to obtain a larger creepage distance.
- the guide and / or centering element according to the invention can be obtained particularly simply if at least one of these ribs is made larger, in particular such that its outer diameter is only slightly smaller than the inner diameter of the pole shell at this point.
- the guiding and / or centering element can then be manufactured in the simplest manner in the production of the drive rod or the ribs, for example by means of an injection molding process.
- the guiding and / or centering element is preferably provided at that end of the drive rod or in the region of that end of the drive rod, which faces the vacuum interrupter or the Bewegumblean gleichbolzen the vacuum interrupter, ie at or in the region of the switch drive end facing the drive rod.
- the constructive design of the Wegerpols is not complicated by the invention, since no additional components are needed.
- the guiding and / or centering means are designed as part of the drive rod, in particular as an integral part of the drive rod. Due to the fact that the centering element can be molded onto the drive rod or its insulating ribs to be produced anyway from a plastic material, the additional costs are minimal.
- FIG. 1 shows a switch pole of a conventional circuit breaker
- FIG. 2 shows a switch pole of a circuit breaker according to the invention
- FIG. 3 shows a conventional insulating rod
- FIG. 4 shows an insulating rod according to the invention
- FIG. 7 shows a third guiding and / or centering element.
- the 1 shows by way of example a switch pole 2 of a circuit breaker 1, for example a medium-voltage circuit breaker.
- the two other switch poles 2 of the circuit breaker 1 are not shown.
- the switch pole 2 has a pole shell 3, in which a vacuum interrupter. 4 is included.
- the vacuum interrupter 4 is used for switching or interrupting a guided over the circuit breaker 1 current.
- the details of the vacuum interrupter 4 and the structure of the switch pole 2 are not shown in detail.
- the person skilled in the art is aware that the fixed contact of the vacuum interrupter 4 is electrically conductively connected to a pole head 5 via a fixed contact connection pin.
- the pole head 5 is connected to a switchgear in which the circuit breaker 1 is used.
- the moving contact of the vacuum interrupter 4 is connected via a BewegCountan gleichbolzen with a pole carrier 6, which in turn is electrically connected to the switchgear in which the circuit breaker 1 is used.
- the lifting movement of the moving contact takes place in the direction of a central axis. 7
- the vacuum interrupter 4 and the pole carrier 6 are adjoined by an axially movable drive rod 8, which mechanically connects the vacuum interrupter 4 with the merely indicated switch drive 9.
- the drive rod 8 is coupled to the moving contact, more precisely to the Bewegromean gleichbolzen the vacuum interrupter 4.
- the drive rod 8 is designed to be electrically insulating or at least has an insulating section in order to ensure electrical isolation between the current path on the one hand and the switch drive 9 on the other hand.
- the drive rod 8 extends through the arranged in the pole support 6 base plate of the circuit breaker 1 for introducing a symbolized by arrow 13 drive movement in the BewegCountan gleichbolzen to open or close the contact system of the vacuum interrupter 4.
- FIG. 1 only one connecting means 15 attached to the drive rod 8 at the end, here in the form of a screw nut, for connecting the drive rod 8 to the switch drive 9 is shown.
- the switch pole 2 of a circuit breaker 1 according to the invention shown in FIG. 2 differs from the switch pole 2 shown in FIG. 1 in that an annular flange 21 is provided at the lower end of the drive rod 8 opposite the moving contact connection bolt or in this end region 14 of the drive rod 8 is provided, whose outer diameter 22 is slightly smaller than the inner diameter 23 of the pole shell 3 at this axial point 24.
- This annular flange 21 is another, with the main body 11 of the drive rod 8 connected to the insulating rib, as radially between the drive rod On the one hand and the pole shell 3 on the other hand positioned guide and / or centering for independent axial alignment of the drive rod 8 in the pole shell 3 is used.
- the annular flange 21 is made of a suitable plastic material. placed and integrally connected to the main body 11 of the drive rod 8, in particular molded onto this.
- the annular flange 21 which completely surrounds the main body 11 of the drive rod 8 is in the example shown here the only structural element along the axis 7 of the drive rod 8 with a diameter 22 which is larger than the further insulating ribs 12.
- the circumference forms More specifically, the lateral surface 25 of this annular flange 21 with the inner side 18 of the pole shell 3 from a uniform annular gap 26, see Figures 2 and 5.
- a lateral movement of the drive rod 8 or in other words a movement in the radial direction, d. H. in the direction perpendicular to that central axis 7, in whose direction the drive rod 8 performs a longitudinal movement 13, is thus limited to a minimum, namely the width of the annular gap 26.
- FIG. 1 A drive rod 8 with such an annular flange 21 is shown in FIG. 1
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014212583.9A DE102014212583A1 (en) | 2014-06-30 | 2014-06-30 | Avoid misalignment of a drive rod of a circuit breaker |
PCT/EP2015/062608 WO2016000907A1 (en) | 2014-06-30 | 2015-06-05 | Avoiding incorrect orientations of a drive rod of a power switch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3138113A1 true EP3138113A1 (en) | 2017-03-08 |
EP3138113B1 EP3138113B1 (en) | 2020-09-16 |
Family
ID=53396470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15728813.5A Active EP3138113B1 (en) | 2014-06-30 | 2015-06-05 | Avoiding incorrect orientations of a drive rod of a power switch |
Country Status (5)
Country | Link |
---|---|
US (1) | US10096444B2 (en) |
EP (1) | EP3138113B1 (en) |
CN (1) | CN106463299B (en) |
DE (1) | DE102014212583A1 (en) |
WO (1) | WO2016000907A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111696822A (en) * | 2020-06-24 | 2020-09-22 | 广东电网有限责任公司电力科学研究院 | Vacuum arc-extinguishing chamber and pole-mounted switch |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017203208A1 (en) * | 2017-02-28 | 2018-08-30 | Siemens Aktiengesellschaft | Power transmission unit for a circuit breaker |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3189715A (en) * | 1962-05-21 | 1965-06-15 | Jennings Radio Mfg Corp | Internal shield and seal structure for vacuum sealed switch envelope |
US3261954A (en) | 1965-01-11 | 1966-07-19 | Joslyn Mfg & Supply Co | Current interruption and separation electrode structure for vacuum switching apparatu |
US3440377A (en) * | 1966-08-08 | 1969-04-22 | Allis Chalmers Mfg Co | Removable shield means for vacuum switch bellows |
US3594525A (en) * | 1969-04-21 | 1971-07-20 | Gen Electric | Common parallel operating means for series-connected, laterally offset vacuum switches |
US4061894A (en) * | 1976-04-28 | 1977-12-06 | General Electric Company | Vacuum-type circuit interrupter with improved protection for bellows |
US4443672A (en) * | 1982-02-11 | 1984-04-17 | International Telephone & Telegraph Corporation | Low capacitance radio frequency switch |
US5597992A (en) * | 1994-12-09 | 1997-01-28 | Cooper Industries, Inc. | Current interchange for vacuum capacitor switch |
DE19814398C1 (en) * | 1998-03-31 | 1999-12-30 | Moeller Gmbh | Electrical switching device, in particular electromagnetic switching device with vacuum interrupter |
JP3930208B2 (en) * | 1999-10-07 | 2007-06-13 | 株式会社日立製作所 | Vacuum insulated switchgear |
DE19959207C2 (en) * | 1999-12-08 | 2001-10-18 | Siemens Ag | Vacuum contactor with sliding guide element |
FR2836277B1 (en) * | 2002-02-19 | 2004-04-16 | Alstom | SPRING DRIVE MECHANISM FOR RECLINKED MOTION CIRCUIT BREAKER |
DE10207892B4 (en) * | 2002-02-20 | 2004-02-05 | Siemens Ag | Vacuum interrupter with a switch contact piece |
CN201075805Y (en) | 2007-08-04 | 2008-06-18 | 万德鸿 | Ultra large torque moment and low speed frequency conversion wheel hub motor |
JP5297682B2 (en) * | 2008-04-24 | 2013-09-25 | 株式会社明電舎 | Vacuum circuit breaker |
DE202011106188U1 (en) * | 2011-09-30 | 2013-01-09 | Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co | Schalterpoleinheit |
EP2682974A1 (en) * | 2012-07-06 | 2014-01-08 | ABB Technology AG | Pushrod assembly for a medium voltage vacuum circuit breaker |
CN203339047U (en) * | 2013-03-20 | 2013-12-11 | 广东维能电气有限公司 | Voltage-sharing ground-shield high-voltage vacuum arc-extinguishing chamber embedded pole of lumbar support rotation type |
-
2014
- 2014-06-30 DE DE102014212583.9A patent/DE102014212583A1/en not_active Withdrawn
-
2015
- 2015-06-05 EP EP15728813.5A patent/EP3138113B1/en active Active
- 2015-06-05 US US15/318,554 patent/US10096444B2/en active Active
- 2015-06-05 WO PCT/EP2015/062608 patent/WO2016000907A1/en active Application Filing
- 2015-06-05 CN CN201580031300.9A patent/CN106463299B/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111696822A (en) * | 2020-06-24 | 2020-09-22 | 广东电网有限责任公司电力科学研究院 | Vacuum arc-extinguishing chamber and pole-mounted switch |
CN111696822B (en) * | 2020-06-24 | 2022-06-14 | 广东电网有限责任公司电力科学研究院 | Vacuum arc-extinguishing chamber and pole-mounted switch |
Also Published As
Publication number | Publication date |
---|---|
US10096444B2 (en) | 2018-10-09 |
WO2016000907A1 (en) | 2016-01-07 |
CN106463299A (en) | 2017-02-22 |
US20170133181A1 (en) | 2017-05-11 |
EP3138113B1 (en) | 2020-09-16 |
DE102014212583A1 (en) | 2015-12-31 |
CN106463299B (en) | 2019-09-27 |
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