Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
  • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
  • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
  • H02B13/035—Gas-insulated switchgear
  • H02B13/0352—Gas-insulated switchgear for three phase switchgear

Definitions

• the invention relates to a circuit breaker arrangement according to the preamble of claim 1.
• a high-voltage switch panel is known.
• the three switch poles are housed in a cylindrical switch housing.
• pipe projections are formed on opposite outer sides, are introduced via the arranged in the corners of a triangle ladder.
• the switch poles are arranged in a line one behind the other and supported only by the conductors.
• the invention has for its object to provide an improved circuit breaker assembly.
• circuit breaker arrangement with the features of claim 1.
• a circuit breaker assembly comprises a metal-enclosed circuit breaker housing in which three switching units are arranged, wherein the circuit breaker housing has openings for passing first and second connection lines of the switching units and wherein a fixed contact side of the switching units is mechanically held only by the first connecting lines connected thereto in the circuit breaker housing.
• the fixed contact side of the switching unit only by the first connecting lines connected thereto, d. H. by busbar busbar, mechanically held in the circuit breaker housing and the drive contact side of the respective switching unit has in the form of the holder on an isolated support to the circuit breaker housing, which is simple and very inexpensive to produce.
• the drive contact side of the respective switching unit hangs in this holder, ie it is fastened to the holder with an upper region.
• a lower region of the drive contact side of the respective switching unit is then arranged freely suspended in the circuit breaker housing.
• the second connection lines are advantageously connected in a middle or lower region of the drive contact side of the respective switching unit, so that then, for example, an additional support of the drive contact side of the respective contact lines of the respective switching lines.
• a lateral support ie in the transverse direction to a longitudinal extent of the switching unit.
• the holder is formed of a plastic. It is also possible to isolate only portions of the holder, d. H. preferably made of plastic, and other portions, for example fastening units, by means of which the drive contact sides of the switching units are connectable or connected to the holder, are for example made of metal, thereby enabling a better attachment of the drive contact sides of the switching units to the holder. It is only necessary to ensure that electrically insulating regions of the holder are arranged between the fastening units and the circuit breaker housing, d. H. that no electrically conductive connection exists from the switching units via the holder to the circuit breaker housing. As a result, the holder is simple, fast and inexpensive to manufacture, for example in a casting process, for example in an injection molding process. Furthermore, the plastic ensures the electrical insulation effect of the holder. As such a plastic for the production of
• Holder is preferably a casting resin, in particular an epoxy resin.
• the holder is designed as an insulating plate or particularly preferably the holder is designed as a truss structure which has a plurality of webs for holding fastening units for the drive contact side of the switching units.
• the insulation plate is particularly easy and inexpensive to manufacture.
• the formation of the holder in the form of the truss structure is particularly advantageous.
• This truss structure extends in a plane, wherein the fastening units are connected to each other via the webs and with attachment points, via which the holder is mechanically connected to the circuit breaker housing.
• the truss structure can also be produced, for example, by means of a correspondingly shaped casting mold in a very simple and cost-effective manner in mass production. It is achieved by the truss structure material savings.
• the truss structure and in particular its webs ie their number, course and training, according to respective requirements dimensioned to optimally absorb the forces occurring and can be derived on the circuit breaker housing.
• this truss structure is a significantly lower surface, in particular on an upper side of the holder, compared to an insulating plate, so that particle deposition on the surface is greatly reduced.
• a particle deposition which is formed for example by abrasion due to movements of the movable contacts of the circuit breaker assembly, ie the drive contact side of the switching units, caused by an arc between the electrical contacts decomposition products and / or by an insulating gas of the circuit breaker assembly and is also referred to as switching dust, may form an electrically conductive connection between the switching units and the circuit breaker housing. This danger is greatly reduced by the considerably reduced surface of the holder due to the truss structure.
• a cross-section of the bars preferably decreases from a lower side in the direction of an upper side, in particular the cross-section is reduced substantially uniformly.
• an uppermost region of each web is rounded or tapering upwards.
• the holder has on its upper side no horizontally oriented surface on which particles could deposit, or the horizontally oriented surface is at least minimized.
• the cross section of the webs is formed substantially triangular. This both optimizes the stability of the webs and minimizes the horizontally aligned surface at the top of the mount.
• the circuit breaker housing has at least one shape on which the holder rests.
• This formation may be formed, for example, as a circumferential ridge or there are formed on an inner side of the circuit breaker housing a plurality of formations on which the holder rests with different areas.
• the formation or the plurality of formations can be formed in a simple manner during production of the circuit breaker housing in this, for example by forming the circuit breaker housing or already during formation of the circuit breaker housing, for example in a casting process.
• the holder is connected to the circuit breaker housing in a form-fitting, non-positive and / or materially bonded manner.
• the holder may for example be placed on only one or more formations of the circuit breaker housing.
• the holder is attached to such formations such that movements of the holder are prevented. Therefore, the holder is preferably bolted to the circuit breaker housing. However, it can also be riveted, glued or clamped, for example, with the circuit breaker housing. A combination of several such types of fastening is possible.
• the drive contact side of the switching units is attached to the holder in a form-fitting, non-positive and / or cohesive manner. This can also be done, for example, by screwing, riveting, gluing and / or by jamming.
• Drive elements for closing and opening the switching units are expediently passed through openings in the holder and led out, for example, upwards out of the circuit breaker housing, so that they can be coupled or coupled to a corresponding drive.
• an interior of the circuit breaker housing is filled with an insulating gas.
• the interior of the circuit breaker housing may also be filled, for example, with air, in which case advantageously an air pressure of the air in the circuit breaker housing is higher than an ambient air pressure of the circuit breaker arrangement.
• the circuit breaker housing is cylindrical, wherein the switching units are arranged in the axial direction of the circuit breaker housing in this. This allows a compact, space-saving and at the same time stable and easy to manufacture embodiment of the circuit breaker housing.
• the connection lines or at least some of the connecting lines can be arranged, for example, extending at least in regions parallel to the switching units extending in the circuit breaker housing. With a cylinder-shaped circuit breaker housing, a required space is available.
• the three switching units are arranged parallel to each other and on a line next to each other.
• the required space in the circuit breaker housing for the connecting cables is ensured.
• the circuit breaker assembly comprises in a possible embodiment at least one feedthrough current transformer whose active parts extend from the circuit breaker housing in an opening in the circuit breaker housing. With this feedthrough current transformer, a current intensity of a respective current flowing through the connecting lines current can be determined.
• FIG. 1 shows schematically a longitudinal sectional view of a
• FIG. 2 shows schematically a circuit breaker arrangement in FIG.
• Power switch assembly schematically a sectional view of a holder of a drive contact side of switching units of a circuit breaker arrangement along the section line VII-VII in Figure 5, schematically a sectional view of a holder of a drive contact side of switching units ner ner circuit breaker assembly along the section line VIII-VIII in Figure 5, schematically a Sectional view of a support of a drive contact side of switching units of a circuit breaker assembly along the section line IX-IX of Figure 5, and schematically a sectional view of a holder of a drive contact side of switching units ner ner circuit breaker assembly along the section line XX of Figure 5. Corresponding parts are provided in all figures with the same reference numerals.
• FIGS 1 to 3 show a circuit breaker assembly 1 with a substantially cylindrical metal-encapsulated circuit breaker housing 2. This is shown in Figure 1 in a longitudinal sectional view and in Figures 2 and 3 from above, in a plan view and in a perspective view. In the views from above, an upper cover 3 and a drive unit 4 of the circuit breaker assembly 1 is removed, so that a view into an interior of the circuit breaker housing 2 is made possible.
• the circuit breaker housing 2 three switching units 5 are arranged. These switching units 5, which are also referred to as breaker units or as circuit breaker poles, are arranged parallel to one another and on a line next to one another and aligned in the axial direction of the circuit breaker housing 2.
• the circuit breaker housing 2 is gas-tightly sealed in an operating state of the circuit breaker assembly 1 and filled with an insulating gas.
• the circuit breaker housing 2 has openings on opposite longitudinal sides for the passage of first connecting lines 6 and second connecting lines 7 of the switching units 5.
• the second connecting lines 7 are each connected to a drive contact side 5.1 and the first connecting lines 6 are each electrically connected to a fixed contact 5.2 of the respective switching unit 5, for example by means of corresponding plug contacts, both an electrical and a mechanical connection of the connecting lines 6, 7 with the respective Enable switching unit 5.
• the first and second connection lines 6, 7 are led out of the circuit breaker housing 2 in a gas-tight manner through these openings and are connected, for example, to connecting conductors (not illustrated here).
• connection lines 6, 7 are expediently passed through the openings in such a way that they are arranged in the respective opening in vertices of a triangle, ie in each case two connecting lines 6, 7 are arranged next to one another in the respective opening and a further connecting line 6 , 7 is on the two lower to end lines 6, 7 and on a vertical plane angeord net, which extends between the two lower connecting lines 6, 7 therethrough.
• the openings are formed as Rohrans2011 ze 8, which for the gas-tight sealing of the
• Circuit-breaker housing 2 are closed with Isolier withdrawersplatten.
• One of these pipe extensions 8, through which no connection lines 6, 7 are passed in this exemplary embodiment, is closed gas-tight with a cover 10.
• the fixed contact side 5.2 of the switching units 5 is mechanically held only by the connected thereto first connecting lines 6 in the circuit breaker housing 2.
• the drive contact side 5.1 of the switching units 5 is mechanically held by means of a mechanically coupled to the circuit breaker housing 2 th holder 11 made of an electrically insulating material in the circuit breaker housing 2.
• An exemplary embodiment of such a holder 11 is shown schematically in Figures 4 to 10.
• the fixed contact side 5.2 of the respective switching unit 5 is held mechanically only by the first lines 6 connected thereto, ie by busbar conductors in the circuit breaker housing 2, and the drive contact side 5.1 of the respective switching unit 5 has a shape in the form of the mounting 11 isolated support to the circuit breaker housing 2, which is easy and very inexpensive to produce.
• cost savings compared to power switches known from the prior art are achieved and it is a simple, compact and inexpensive construction of the circuit breaker assembly 1 allows.
• a lower region of the drive contact side 5.1 of the respective switching unit 5 is then freely suspended in the circuit breaker housing 2.
• the second connection lines 7 are advantageously connected in a middle or lower region of the drive contact side 5.1 of the respective switching unit 5, so that then, for example, an additional support of the drive contact page 5.1 of the respective switching unit 5 is achieved by these second leads 7, in particular a lateral support, ie in the transverse direction to a longitudinal extent of the switching unit 5. Since the drive contact side 5.1 of the switching units 5 is not held by these second connecting lines 7, but by the holder in the circuit breaker housing 2, and secured and supported by the second connecting leads 7 only additionally against lateral movements, These second connecting lines 7 are less massive, so that a space reduction of the circuit breaker assembly 1 is reached.
• the holder 11 is formed of a plastic. It is also possible for only partial regions of the holder 11 to be insulating, ie preferably made of plastic, and other partial regions, for example fastening units 12, by means of which the drive contact sides 5.1 of the switching units 5 can be connected or connected to the holder 11, are made of metal, for example. thereby to allow a better attachment of the drive contact sides 5.1 of the switching units 5 to the holder 11. It is only necessary to ensure that electrically insulating regions of the holder 11 are arranged between the fastening units 12 and the circuit breaker housing 2, ie that no electrically conductive connection exists from the switching units 5 via the holder 11 to the circuit breaker housing 2.
• the holder 11 is simple, fast and inexpensive to manufacture, for example in a casting process, for example in an injection molding process. Furthermore, the electrical insulation effect of the holder 11 is ensured by the plastic.
• a plastic for producing the holder 11 is preferably a casting resin, in particular an epoxy resin.
• the holder 11 is formed as an insulating plate or particularly preferably the holder 11, as in the embodiment shown here, formed as a truss structure having a plurality of webs 13 for holding the fastening units 12 for the drive contact side 5.1 of the switching units 5 , The embodiment of the insulating plate, not shown here is particularly simple and inexpensive to manufacture.
• the design of the holder 11 in the form of the truss structure shown here is particularly advantageous.
• This truss structure extends in a plane, wherein the fastening units 12 are connected to each other via the webs 13 and with attachment points 14, via which the Holder 11 is mechanically connected to the circuit breaker housing 2.
• the truss structure is also very easy and inexpensive to produce in mass production, for example by means of a correspondingly shaped mold. In this case, material savings are achieved by the truss structure.
• very effectively occurring forces such as forces due to thermal expansion, electromagnetic forces and switching forces, absorbable and derivable.
• the truss structure and in particular its webs 13, ie their number, course and design can be dimensioned according to respective requirements in order to optimally absorb the forces occurring and to be able to derive them onto the circuit breaker housing 2.
• This truss structure is a significantly lower surface area compared to an insulating plate, in particular on an upper side of the holder 11, so that particle deposition on the surface is greatly reduced.
• a particle deposition for example, by abrasion due to movements of the movable contacts of the circuit breaker assembly, d. H. the drive contact side 5.1 of the switching units 5, by a arc between the electrical contacts caused decomposition products and / or by an insulating gas of the
• Circuit breaker assembly 1 forms and is also referred to as switching dust, an electrically conductive connection between the switching units 5 and the circuit breaker housing 2 can form. This risk is greatly reduced by the due to the truss structure significantly reduced surface of the bracket 11.
• a cross-section of the bars 13 decreases from a lower side in the direction of an upper side, in particular the cross-section is reduced substantially uniformly.
• a required staff Did the holder 11 ensured by a sufficiently strong formation of the webs 13 and it is achieved for each required stability as low as possible surface of the top of the holder 11.
• side walls 13.1 of the webs 13 are aligned at an angle greater than 0 ° and less than 90 ° to the horizontal, ie, the webs 13 have beveled side walls 13.1, on which particles do not deposit, but they slide from the side walls 13.1 from.
• each web 13 is rounded or tapering upwards.
• the holder 11 has on its upper side no horizontally oriented surface on which particles could deposit, or the horizontally oriented surface is at least minimized.
• the cross section of the webs 13 is substantially triangular. As a result, both the stability of the webs 13 is optimized and the horizontally oriented surface on the upper side of the mount 11 is minimized.
• the circuit breaker housing 2 has in this embodiment example, as shown in Figures 2 and 3, on an inner side four formations 15, on which the holder 11 rests with one fastening point 14 each.
• Attachment points 14 of the bracket 11 converge stronger trained webs 13 of the truss structure together so that the mounting units 12 are supported by these stronger webs 13 on the formations 15 of the circuit breaker housing 2 and mechanically supported.
• the circuit breaker housing 2 may also have, for example, a molding 15, which is then formed, for example, as a circumferential edge.
• a plurality of formations 15 can be formed in a simple manner during manufacture of the circuit breaker housing 2 in the same, for example, by a reshaping of the circuit breaker housing 2 in this circuit breaker housing 2 or already during a design of the circuit breaker housing 2, for example in a casting process.
• the holder 11 is connected to the circuit breaker housing 2 in a form-fitting, non-positive and / or cohesive manner.
• the holder 11 may be placed, for example, only on the formations 15 of the circuit breaker housing 2.
• the holder 11 is preferably fastened to the formations 15 such that movements of the holder 11 are prevented.
• the holder 11 is therefore bolted to the circuit breaker housing 2.
• it can be riveted, glued or clamped in other, not shown embodiments, for example, with the circuit breaker housing 2.
• a combination of several such types of attachment is possible.
• Switching units 5 on the holder 11 positively, frictionally and / or materially attached. This is done in this embodiment, as shown in Figures 2 and 3, by screwing a cast body 16, d. H. a metal-cast unit of the respective drive contact - page 5.1 with the respective fastening unit 12 of the holder 11, but in other embodiments, for example, by riveting, gluing and / or by jamming done.
• the cast bodies 16 have a hollow interior, in each of which a movable pole contact rod 17 of the drive contact side 5.1 of the switching unit 5 is arranged. Since these pole contact rods run in the interior of the respective cast body 16, they are not shown in detail in FIG.
• These pole contact rods 17 are each connected to an upper side with a drive element 18 designed as an insulating rod for closing and opening an electrical connector. is clocks between the fixed contact page 5.2 and the drive contact page 5.1 of the switching units 5 coupled.
• the drive elements 18 are guided out of the circuit breaker housing 2 through openings in the holder 11, more precisely through openings in the fastening units 12, and are guided outside the circuit breaker housing 2 to a corresponding drive unit 4.
• this drive unit 4 is designed as a mechanical spring-loaded drive.
• the switching units 5 furthermore have a plurality of gas nozzle units 19 for guiding the insulating gas to an arc which forms during the closing and opening of the contacts, and outlet openings 20 for insulating gas which is heated by the arc.
• the switching units 5 are in the example shown in Figure 1 in an open state. After triggering the spring unit designed as a drive unit 4 moves, driven by this, a connecting rod 21 in the direction of the circuit breaker housing 2.
• This connecting rod 21 is coupled via a lever mechanism 22 with the drive elements 18 designed as insulating rods, so that a deflection of the movement the connecting rod 21 on the drive elements 18 takes place such that the drive elements 18 move downward, d. H. into the circuit breaker housing 2 inside.
• they push the pole contact rods 17 in the direction of the fixed contact side 5.2 of the switching units 5. This leads to the closing of the electrical contact between the fixed contact side 5.2 and the drive contact side 5.1 of the switching units 5, d. H. to a
• the circuit breaker assembly 1 further comprises a bushing current converter 23 whose active parts extend from the cylindrical circuit breaker housing 2 into one of the openings of the circuit breaker housing 2, which is formed as a tubular extension 8 adjoining the circuit breaker housing 2. With this feedthrough current transformer 23, a current intensity of a respective current flowing through the connecting lines 6, 7 can be determined.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Gas-Insulated Switchgears (AREA)
• Switch Cases, Indication, And Locking (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=48045489

Family Applications (1)

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• 2012
  • 2012-04-13 DE DE102012206084A patent/DE102012206084A1/de not_active Withdrawn
• 2013
  • 2013-03-27 EP EP13713838.4A patent/EP2820730A1/de not_active Withdrawn
  • 2013-03-27 AU AU2013245603A patent/AU2013245603B2/en not_active Expired - Fee Related
  • 2013-03-27 RU RU2014145354A patent/RU2014145354A/ru not_active Application Discontinuation
  • 2013-03-27 WO PCT/EP2013/056539 patent/WO2013152954A1/de active Application Filing
  • 2013-03-27 CN CN201380018479.5A patent/CN104205538B/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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