EP3345202A1 - Medium voltage switchgear with frame and/or support element - Google Patents
Medium voltage switchgear with frame and/or support elementInfo
- Publication number
- EP3345202A1 EP3345202A1 EP16757913.5A EP16757913A EP3345202A1 EP 3345202 A1 EP3345202 A1 EP 3345202A1 EP 16757913 A EP16757913 A EP 16757913A EP 3345202 A1 EP3345202 A1 EP 3345202A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pole parts
- joining element
- medium voltage
- voltage switchgear
- fixed
- 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
- 239000011810 insulating material Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 239000012777 electrically insulating material Substances 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 abstract description 6
- 230000035882 stress Effects 0.000 description 4
- 239000012815 thermoplastic material Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000007704 transition Effects 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
- H01H33/666—Operating 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
- H01H33/60—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
- 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
- H01H33/60—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
- H01H2033/6665—Details concerning the mounting or supporting of the individual vacuum bottles
Definitions
- the invention relates to a medium voltage switchgear with frame, wherein a three phase arrangement of pole parts with vacuum interrupters inside circuit breakers are fixed at one end on a support or a frame element, which is arranged in a switchgear panel, wherein the open ends of the pole parts, opposite to the fixed ends of the pole parts fixed on the support or frame, are among themselves mechanically joined or connected by an additional joining element, and near to the aforesaid open ends of the pole parts, one electrical terminal per pole part is placed, according to the preamble of claim 1 .
- the invention is based on medium voltage vacuum circuit breakers for switchgears and vacuum circuit breaker "stand-alone".
- medium voltage vacuum circuit breakers mainly consist of a drive mechanism and electric poles.
- Vacuum interrupters are installed within the poles or pole parts.
- the drive is connected to the vacuum interrupters via pushrods which drive the mechanical movement of the switching contacts inside the vacuum interrupters.
- the poles provide the mechanical support to the vacuum interrupters.
- the poles are fixed to the circuit breaker structure and therewith to the gas-insulated switchgear panel or inside air-insulated environment.
- EP 2 720 245 A1 An assembled pole parts are disclosed in EP 2 720 245 A1 .
- This document discloses a vacuum interrupter which is arranged or mounted between two halfshells made of insulating material. In three phase arrangements, three pole parts are arranged in parallel. Short circuits cause a high mechanical impact to the positioned pole parts, so that joining elements are used to mechanically connect such pole parts in such arrangements.
- the pole-design has to withstand also the dielectric and thermal stress during service and testing conditions.
- the insulation parts of electric poles must provide sufficient electric creepage distance on electrically stressed paths and sufficient high electric resistivity. Furthermore the design should avoid thin gas gaps between insulating and electrically stressed parts where an accumulation of the electric field appears.
- the pole design and especially the mechanically supporting parts of the poles must withstand the mechanical stress during switching of the circuit breaker and the electromagnetic forces during short circuit current application like short time current or short circuit current interruption operation.
- the invention proposes, that the joining element is made of insulating material and tightly fixed among the open ends of the pole parts in such, that they mechanically interconnect the pole parts and additionally increases the dielectrical withstand between the terminals of the pole parts from each other. Thermal conductivity can be provided to enable the part as a heat sink.
- the joining element made of insulating material which is fixed tightly over the open ends of the pole parts, reinforces the mechanical stiffness of the pole part arrangement, and simultaneously results in an increase of the dielectrical withstand between the electrical terminals of the pole parts in this region.
- the joining element is at least partly covered by a conductive surface deposition in order to compensate electrical surface charging.
- the joining element is a plate.
- the joining element is reinforced at least at one surface by a crossbeam structure.
- the joining element is provided with sealing strips or paths or regions between each pole part, at that side of the joining element, which is directly fixed on the pole parts.
- the joining element is fixed commonly at the open ends of the pole parts via insulating screws, screwed into female threads, which are integrated or implemented in the insulating half shells or embedding cover of the pole parts.
- the insulating half shells or the insulating embedding cover of the vacuum interrupters are made of
- thermoplastic BMC or duroplastic material.
- the joining element is fixed commonly at the open ends of the pole parts via high strength insulating or metallic screws, at least at the resulting four corners of the joining element, screwed into female screw threads, which are integrated or implemented in the insulating half shells or resin of the pole parts.
- the insulating half shells or the insulating material for embedding the vacuum interrupters are made of thermoplastic material.
- the invention can be realized in an advantageous way in so called assembled pole parts, in which the insulation cover of the vacuum interrupters consists of assembled half shells, like is is shown in figure 1 .
- pole parts partly or fully embedded vacuum interrupters are not the only possible embodiment for the invention. It is also applicable for pole parts partly or fully embedded vacuum interrupters.
- This joining element is in one embodiment designed as or provided with a cross beam structure 3 on the opposite surface of the plate fixed tightly among the electric poles or pole parts 2. It is fixed to the ends of the poles opposite to the drive.
- the joining element 1 is provided with openings 3, in which counter- or fixation- discs or -plates 4 are introduced, in order to fix the joining element with each of the pole parts 2, like shown in figure 3.
- the complete reinforcement element including the mechanically reinforcing cross beam structure is made from thermoplastic material and is produced in a single injection molding process.
- the joining element is designed to be fixed on poles which mechanical support structure is realized by thermoplastic half- shells.
- the fixation of the joining element to the end of the pole half-shells is done by e.g. high-strength, insulating screws and/or some overlapping areas to fix or take the forces from the half shell to the support structure.
- the transition between the end-faces of the pole half-shells and the joining element is sealed by an elastic two compound sealing material. This sealing is already fixed to the joining element during its molding process. It is important, that the sealing is tight, in dielectric sense.
- reinforcement element prevents from flash- overs between conducting parts of the poles at high voltage levels and narrow pole distances.
- a further alternative embodiment of the joining element may be provided with a low conductive suface finish in order to allow the equalization of accumulated electric charges between the insulating pole supports.
- a further embodiment of the reinforcement element may be fixed to the pole half-shells by self-tapping screws.
- Figure 2 shows the joining element 1 from the side, which comes into tight mechanical contact to the ends of the pole parts 2.
- the joining element is provided at that side with sealing strips 4, in order to result in good dieletric withstand. Therefore sealing elements were extruded on the joining elements surface. So far, also sealing elements can be used which are positioned in grooves on the surface of the joining element. Furthermore glueing is possible.
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15183216.9A EP3136415A1 (en) | 2015-08-31 | 2015-08-31 | Medium voltage switchgear with frame and/or support element |
PCT/EP2016/070425 WO2017037068A1 (en) | 2015-08-31 | 2016-08-30 | Medium voltage switchgear with frame and/or support element |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3345202A1 true EP3345202A1 (en) | 2018-07-11 |
EP3345202B1 EP3345202B1 (en) | 2021-12-01 |
Family
ID=54014675
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15183216.9A Withdrawn EP3136415A1 (en) | 2015-08-31 | 2015-08-31 | Medium voltage switchgear with frame and/or support element |
EP16757913.5A Active EP3345202B1 (en) | 2015-08-31 | 2016-08-30 | Medium voltage switchgear with frame and/or support element |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15183216.9A Withdrawn EP3136415A1 (en) | 2015-08-31 | 2015-08-31 | Medium voltage switchgear with frame and/or support element |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP3136415A1 (en) |
CN (1) | CN107924785B (en) |
WO (1) | WO2017037068A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3836322B1 (en) * | 2019-12-11 | 2023-08-30 | ABB Schweiz AG | A circuit breaker pole for low voltage or medium voltage operation |
ES2943533T3 (en) * | 2020-07-20 | 2023-06-14 | Abb Schweiz Ag | circuit breaker compartment |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54101476U (en) * | 1977-12-28 | 1979-07-17 | ||
JP2000357442A (en) * | 1999-06-15 | 2000-12-26 | Toshiba Corp | Vacuum breaker and metal-closed switching gear |
JP2002124159A (en) * | 2000-10-16 | 2002-04-26 | Mitsubishi Electric Corp | Switch device |
CN201359956Y (en) * | 2008-06-27 | 2009-12-09 | 石家庄科林电气设备有限公司 | Combined medium-voltage vacuum circuit breaker |
EP2387057B1 (en) * | 2010-05-12 | 2012-05-23 | ABB Technology AG | Gas-isolated high voltage switch |
EP2568554A1 (en) * | 2011-09-12 | 2013-03-13 | ABB Technology AG | An integrated support for fixing electrical buses |
CN202332699U (en) * | 2011-11-28 | 2012-07-11 | 现代重工(中国)电气有限公司 | Insulation bracket for fixing vacuum tube of vacuum breaker |
EP2720245A1 (en) | 2012-10-15 | 2014-04-16 | ABB Technology AG | Assembled pole part with pole part frame |
CN204464163U (en) * | 2015-03-17 | 2015-07-08 | 江苏森源电气股份有限公司 | A kind of monostable permanent-magnet breaker framework |
-
2015
- 2015-08-31 EP EP15183216.9A patent/EP3136415A1/en not_active Withdrawn
-
2016
- 2016-08-30 WO PCT/EP2016/070425 patent/WO2017037068A1/en unknown
- 2016-08-30 CN CN201680049824.5A patent/CN107924785B/en active Active
- 2016-08-30 EP EP16757913.5A patent/EP3345202B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN107924785A (en) | 2018-04-17 |
CN107924785B (en) | 2019-12-13 |
EP3345202B1 (en) | 2021-12-01 |
WO2017037068A1 (en) | 2017-03-09 |
EP3136415A1 (en) | 2017-03-01 |
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