Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B17/00—Insulators or insulating bodies characterised by their form
  • H01B17/26—Lead-in insulators; Lead-through insulators
  • H01B17/30—Sealing
  • H01B17/303—Sealing of leads to lead-through insulators
  • H01B17/305—Sealing of leads to lead-through insulators by embedding in glass or ceramic material
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B17/00—Insulators or insulating bodies characterised by their form
  • H01B17/36—Insulators having evacuated or gas-filled spaces

Definitions

• the invention relates to a bushing for energy distribution and transmission with an insulating body, in which a high-voltage contact bolt is at least partially embedded, and a flange connected to the insulating body for fastening the bushing in a through opening of a container wall to earth potential.
• the invention further relates to a gas-tight container for accommodating electrical components from the field of power distribution and transmission ⁇ with such an implementation.
• the bushing has a solid insulating body made of cast resin, in which a high-voltage contact pin is embedded.
• the insulating body is connected to a flange which is circular in plan view.
• the bushing is intended for installation in a through opening of a housing of a medium-voltage switchgear, the flange having a larger diameter than the diameter of the through opening, so that it can be attached to the housing wall in a simple manner.
• Flange portions of the two cone-shaped Iso ⁇ lier emotionss extend in a forward direction and backward direction in a ⁇ .
• a liereffort also in the iso- embedded coupling electrode and a plug pin ⁇ is provided which is conductively connected to the coupling electrode verbun ⁇ .
• the DE 101 64 563 Cl describes an implementation with a holding portion and a flange portion, wherein the Halteab ⁇ section for receiving a contact pin and the Flanschab ⁇ section for attachment to a housing wall on Erdpoten- are potential established.
• the holding section is only ⁇ Lich by a U-shaped folding section with the
• the object of the invention is to provide a bushing and a container of the type mentioned at the outset, which can be produced inexpensively and at the same time provides the necessary dielectric strength.
• the insulating body has an inner wall area which lies flat against the high-voltage contact bolt by injection molding and an outer wall area which is connected to the flange and is connected to the inner wall area via a connecting section, the outer wall area extending from the flange section to the connecting section in a forward direction and wherein the inner wall portion extends from the connecting portion to the
• Flange extends in a rearward direction, so that a cavity is formed which is delimited by the inner wall region, the outer wall region and the connecting section and which is open on one side towards the flange.
• the high-voltage contact bolt is no longer made, for example, in a solid cast insulating body Cast resin embedded. Rather, it is possible within the scope of the invention to design the insulating body on the high-voltage contact bolt by injection molding.
• the high-voltage contact pin is placed in an appropriate mold core. The insulating material is then injected into the mold core under high pressures. After the insulating material has cooled to form the insulating body, the mandrel is removed in said reverse direction.
• a cavity is now provided for insulation, filled with a gaseous insulating medium.
• the insulating gas provided in the cavity depends on the particular type of application of the bushing according to the invention.
• the device according to the invention is advantageously arranged gas-tight on a housing wall of a gas-insulated switchgear assembly, the cavity communicating with a gas space of the switchgear assembly filled with protective gas.
• the cavity is also filled with insulating gas.
• the insulating gas is, for example, sulfur hexafluoride. However, it can also reach other insulating gases to a ⁇ set.
• the inner wall region advantageously has a thickness that decreases in the rearward direction.
• the wall thickness of the inner wall area which decreases toward the flange, makes it easier to pull a mold core out of the insulating body if it is removed from the insulating body after the injection molding.
• Reinforcing ribs are advantageously provided between the inner wall area and the outer wall area. The reinforcing ribs increase the mechanical strength of the bushing.
• the reinforcing ribs have a thickness that decreases in the rearward direction.
• the insulating body is expediently made from a reinforced thermoplastic by injection molding. Thermoplastics have proven to be particularly advantageous. However, other plastics, such as thermosets, can also be used within the scope of the invention.
• the reinforcing ribs extend, for example, over the entire length between the insulating body between the outer wall area and the inner wall area.
• the reinforcing ribs are advantageously formed integrally with the outer wall portion and the inner wall portion and expediently distributed uniformly around the circumference of the réellewandbe ⁇ Reich, wherein they extend radially from the inner wall portion to the outer wall portion.
• the radial distance between the inner wall region and the outer wall region decreases in the forward direction, a conical outer contour being provided.
• the outer wall area expediently has an electrode section with a constant thickness and a cylindrical outer contour. Such an electrode section is required by a large number of standards.
• the electrode section has at least one coupling electrode.
• the coupling electrode is used to control the electrical field and to capacitively detect the high voltage with which the high-voltage contact pin is applied.
• the coupling electrode is expediently connected to a plug pin for connecting a measuring device and a sub-capacitor.
• each coupling electrode is arranged in a preformed electrode pocket which is formed in the electrode section. Due to the cylindrical ⁇ shaped configuration, the electrode pouch in a cross-sectional view ⁇ is designed circular. This has a likewise circular configuration ge of the coupling electrode to Fol ⁇ , the high-voltage contact pins centrally through the in plan looks circular coupling electrode ⁇ he stretched.
• the coupling electrode is made, for example, from a suitable conductor material, such as aluminum, steel or the like, and is subsequently inserted, for example, into the electrode pocket.
• At least one coupling electrode consists of a conductive polymer manufactured in a multi-component injection molding process.
• the insulating body is first formed on the contact bolt. After the insulating body has hardened, the semiconducting polymer is injected into the electrode pockets.
• the insulating body consists of glass fiber reinforced polyamide.
• the flange is advantageously a metallic flange which is embedded in the insulating body.
• the flange is, for example, circular in plan view, with its radially inner end embedded in the insulating body. Deviating from this, the flange is molded onto the outer wall area.
• the design of the flange made of plastic otherwise corresponds to that of the metallic flange.
• an electrode section with a cylindrical outer contour is formed on the outer region, the electrode section being connected to the flange and having an external thread and a sealing section.
• Such an implementation is in an internal thread, for example, on the housing
• Switchgear is screwed. Will ben when Einschrau ⁇ housing parts to the sealing portion, a simple game in ⁇ O-ring is pressed is provided to a ⁇ from reaching high gas tightness between the bushing and the housing.
• the invention achieves the object by means of a gastight container with a through opening in which a bushing according to the invention is attached in a gastight manner, the cavity communicating with an internal volume of the gastight container and both the gastight container and the cavity with a
• FIG. 1 an exemplary embodiment of the invention
• FIG. 2 shows the implementation according to FIG. 1 from below in the forward direction identified by x in FIG. 1,
• FIG. 3 shows another embodiment of the invention
• FIG. 4 shows yet another exemplary embodiment of the implementation according to the invention.
• FIG. 1 shows the implementation 1 according to the invention in a cross-sectional view.
• the bushing 1 comprises a high-voltage contact pin 2 and an insulating body 3, which comprises an inner wall area 4 and an outer wall area 5.
• the inner wall area 4 is connected to the outer wall area 5 via a connecting section 6.
• the outer wall area 5 extends essentially from one
• the inner wall region 4 extends from the connecting section 6 to the flange section in one of the Forward direction opposite reverse direction, so that the outer wall region 5, the connecting section 6 and the inner wall region 4 delimit a cavity 8 which is open on one side towards the flange 7.
• the high-voltage contact bolt 2 and thus also the inner wall area 4 are designed in the shape of a circular cylinder, the reinforcing ribs 9 being equally distributed around the inner wall area 4.
• the outer wall region 5 comprises an electrode section 10 arranged in the vicinity of the flange 7, which is cylindrical and in which electrode pockets 11 are formed.
• Coupling electrodes 12 are provided in the electrode pockets 11 and are connected in an electrically conductive manner to a plug pin 13 which projects into a plug socket 14. The coupling electrode can therefore be connected to a measuring device by means of a suitable plug connection.
• the high-voltage contact bolt 2 is provided on both sides with internal threads 15.
• FIG. 2 shows the implementation according to FIG. 1 from below in the x-direction indicated by the arrow in FIG. 1.
• the reinforcing ribs 9 with respect to each span of the center point of the high-voltage contact bolt 2 miteinan ⁇ of an angle of 90 °.
• the reinforcing ribs 9 also have a thickness that decreases in the rearward direction, so that — as already in connection with FIG the inner wall area 4 was explained - a mold core can be easily removed from the cavity 8 after the injection molding.
• Figure 3 shows a further embodiment of the OF INVENTION ⁇ to the invention implementation.
• the implementation differs from the implementation shown in Figure 1, only in that the coupling electrode is disposed in an electric ⁇ dent 11 ash 12 which is open to the Zen Hochwoodstitlebol- 2 out partially. In this way, the coupling electrode 12 can be better centered and delimited in the injection mold.
• FIG. 4 shows a further exemplary embodiment of the implementation according to the invention, which differs in terms of the configuration of the flange 7 compared to the exemplary embodiments shown in FIGS. 1 and 3.
• the flange 7 is cut in the state shown in Figure 4 embodiment to the Elektrodenab ⁇ 10 integrally formed and thus also consists of a fiber-reinforced plastic.
• the electric ⁇ denabterrorism 10 an external thread 16, so that the through ⁇ guide 1 in a passage opening of a housing with internal thread can be screwed.
• the flange 7 has a sealing joint 17 which can be covered with a sealing material such as an O-ring, so that the necessary gas tightness is provided between the bushing and a housing.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Insulators (AREA)
• Gas-Insulated Switchgears (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37806913

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (16)

Family Cites Families (11)

• 2005
  • 2005-12-09 DE DE200510059754 patent/DE102005059754B4/de not_active Expired - Fee Related
• 2006
  • 2006-12-06 CN CN2006800463952A patent/CN101326595B/zh not_active Expired - Fee Related
  • 2006-12-06 WO PCT/EP2006/069378 patent/WO2007065912A1/de active Application Filing
  • 2006-12-06 EP EP06830419A patent/EP1958215A1/de not_active Withdrawn
• 2008
  • 2008-07-04 NO NO20083041A patent/NO20083041L/no not_active Application Discontinuation

Non-Patent Citations (1)

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