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
  • H01H33/02—Details
  • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
• • 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 present invention relates to a holding device for holding a switch tube in a support frame of a switch pole having a through opening having a holding portion which is adapted to abut on an end face of the interrupter, a fixedly connected to the holding portion flange portion, the outer contour of the end face at least partially encloses, and a support frame attachment for mounting the holding device to the support frame.
• Such a holding device is already known from US 2001/0025829 Al.
• the previously known holding device is designed to hold a vacuum interrupter and has a circular-plate-shaped holding section which, in operation, bears against an end face of a vacuum interrupter, through which a switching bar movable in a longitudinal direction extends.
• the holding section is connected to a holding section extending substantially at right angles thereto, which extends in an installed position around the contour of the inserted vacuum interrupter and thus prevents the vacuum interrupter from slipping off or slipping on or on the flat section.
• the prior art holding device on one side of a kind of hinge with which two halves of the holding device can be folded apart. On a side opposite the hinge, the holding device further has a snap mechanism, so that a
• the holding device For attachment in a support frame, the holding device has retaining rails which can be inserted into complementary form the grooves of the support frame, so that the vacuum interrupter is held by the holding device on its drive side reliable and centered in the support frame, at the same time the mobility of the shift rod is made possible.
• the prior art fixture adheres to the disadvantage that it is made of a non-conductive plastic, so that arise at acute or angularly acted upon with a high voltage potential portions of the interrupter high e- lekthariments or leakage currents.
• the switches equipped with the known holding devices therefore either have a pole center distance that takes account of these high electric field strengths and thus have a large-area design or are limited to correspondingly reduced operating parameters with regard to the permitted operating voltages.
• Object of the present invention is therefore to provide a holding device of the type mentioned above, with the same operating voltage of the switch, a more compact design of a switch or a constant design, an increased operating voltage can be brought about, which has such a holding device.
• the invention solves this problem by a field control element for Abgnan an electric field, which during operation of the interrupter conducting with a component of
• Interrupter is connected, which is during operation of the interrupter at high voltage potential.
• a field control element is provided in or on the holding device, which has the potential during operation, that is to say when a switching tube is applied with voltage, which is acted upon by the component of the interrupter which the field control element contacts.
• the dismantling of the e- Lektrischen field therefore no longer takes place as in the prior art between the lying on high voltage potential component of the interrupter and a lying on ground potential component of the switch, but between the field control element and the component.
• the field control element is designed in such a way that tips, sharp edges or the like are avoided, at which high field intensities could arise. Since the field control element is encased with an insulating material, the high electric field is dissipated in the insulating material.
• the holding device therefore not only has a holding function or possibly a centering effect, but also allows the generation of homogeneous field courses within the Wegerpols.
• the risk of leakage currents, partial discharges or the like is therefore reduced according to the invention, so that more compact designs or higher operating voltages are made possible.
• the configuration of the field control element is arbitrary, for example only embedded metallic network structures or electrically conductive surface layers made of plastic, paint, metal or the like may be mentioned.
• the flange portion advantageously extends at an angle and in particular at right angles to the preferably annular disk-shaped holding section.
• the flange section encloses the contour of the end face of the interrupter.
• the holding section is designed in the manner of an annular disc, wherein the flange section extends on the outer contour of the annular section.
• the flange section projects laterally beyond the interrupter tube and in this way prevents the interrupter from sliding or slipping off the interrupter tube. se on the holding section.
• the flange portion may be closed around the holding portion. In the context of the invention, however, it is also possible that the flange portion extends only at certain portions of the outer contour of the holding portion. Thus, for example, it is possible that the flange portion consists of three evenly distributed over the circumference web portions.
• the field control element extends in or on the flange portion. Due to the arrangement of the
• Flange portion outside of the holding portion has this to the components of the switch pole, which are at a ground potential, the shortest distance. For this reason, the Feldab capitaung preferably takes place between the arranged in the flange portion field control element and lying at ground potential components.
• the field control element comprises a metallic core region of the flange portion, which is surrounded by an insulation.
• the field control element is at least partially formed by a solid metallic core region of the flange section.
• the flange portion can thus consist almost exclusively of the field control.
• the core area is surrounded only by a thin-walled insulation, for example.
• the thin-walled insulation is applied by injection molding, for example.
• the field control element forms the holding section.
• the holding section is at least part of the field control element, wherein this either comprises a core region of the flange section or else via expediently curved flat surface Has wire nets that extend in a plastic part of the flange.
• the holding section is metallic and integrally formed with a likewise metallic core region of the flange section, wherein the core region is surrounded by insulation, so that the field control element is formed by the flange section and the core region.
• the retaining device designed in this way is particularly cost-effective, since the core region of the flange section and the retaining section can be produced by conventional metal production methods, for example by metal diecasting.
• the core area is surrounded by a thin-walled plastic layer by injection molding.
• centering means are provided, which are connected to the holding portion and facing the passage opening.
• the centering means are provided for centering the holding device with respect to a switching rod, which is fixedly connected to a moving contact of the interrupter and extends through the held by the holding device end face of the interrupter.
• the centering on mutually parallel headband which have a receiving groove, wherein threaded plates are arranged in the receiving groove through which extends a aligned on the through hole centering.
• the centering means comprise simple retaining clips, which may for example be formed integrally with the retaining section. The production of the centering is therefore inexpensive, as well as the subsequently necessary threaded plates are low in price.
• the invention further relates to a switch pole with at least one holding device according to the invention.
• the switch pole advantageously comprises a support frame, which consists for example of a mechanically stable plastic. Attached to the support frame are an input port and a discharge port, with a switching tube, such as a vacuum interrupter, extending between the input and output ports.
• the vacuum interrupter has a hollow cylindrical housing made of an insulating material, which is connected at its two end faces with metallic covers.
• the metallic covers of the end faces and the insulating housing form a vacuum-tight vacuum tube housing, with a fixed fixed contact pin extending through the metallic cover on a fixed contact side of the vacuum tube housing.
• the fixed contact pin carries at its projecting into the vacuum tube housing end a fixed contact piece.
• This is located in a longitudinal direction against a longitudinally guided moving contact piece, which is attached to the free end of a shift rod.
• the shift rod extends through the metallic cover opposite the fixed contact pin, wherein a metal bellows, which is fastened on the one hand to the moving contact piece or to the shift rod and on the other hand to the metallic cover, enables the mobility of the moving contact piece.
• the moving contact piece contacts the fixed contact piece, so that a flow of current through the vacuum interrupter is made possible.
• the moving contact piece is separated from the fixed contact piece, wherein between the contact pieces an arc is drawn, which is extinguished at a current zero crossing in the vacuum of the vacuum interrupter.
• the holding device is adapted to receive the interrupter within the flange portion, which prevents lateral slipping of the vacuum interrupter with its front side of the holding portion. If the holding device is arranged on the drive side of the interrupter, the shift rod extends through the passage opening provided in the holding section, so that a longitudinal movement of the interrupter is made possible. If the holding device is arranged on the end face of the interrupter facing away from the drive side, the fixed contact pin projects through the passage opening. For fixing the holding device to the support frame, the holding device has appropriate support frame fastenings.
• FIG. 1 shows an exemplary embodiment of a switch pole according to the invention
• FIG. 2 shows a further exemplary embodiment of the switch pole according to the invention
• FIG. 3 shows a cross-sectional view of the switch pole according to the invention according to FIG. 2,
• FIG. 4 shows an embodiment of the holding device according to the invention
• FIG. 1 shows a perspective view of a first exemplary embodiment of a switch pole 1 according to the invention.
• the switch pole 1 has a mechanically fixed support frame 2, to which a pole head section 3b of an input connection 3 is firmly screwed. This purpose is served by a transversely extending fastening web 4 with mounting holes for screwing the pole head section 3b.
• the fastening web 4 further has a through-opening 5, through which a screwing of a vacuum interrupter 6 as a interrupter at the input connection 5 is made possible.
• the vacuum interrupter 6 consists of a hollow cylindrical ceramic housing 7, which is composed of two parts which are interconnected in the middle of the ceramic housing with the interposition of an intermediate flange. At the end faces, the ceramic housing 7 is closed by metallic covers, which are not visible in Figure 1, so that a vacuum-tight housing is formed.
• a fixed contact pin projects through the upper metallic cover, wherein a fixed contact piece is held stationary on the free side of the fixed contact pin arranged in the vacuum housing.
• the fixed contact piece opposite a longitudinally movably guided BewegMap forum is provided, which is movably held by a shift rod.
• the shift rod passes through a metallic cover facing an outgoing connection 8, a metal bellows providing the axial freedom of movement of the shift rod.
• a holding device 9 is provided which has a support frame attachment 10, with which the holding device 9 is firmly anchored in the support frame 2.
• Another holding device 9 is arranged on the end face of the vacuum interrupter 6, which faces the fastening web 4.
• the shift rod is connected via a suitable lever mechanism 11 with a drive that generates the necessary kinetic energy for switching.
• FIG. 2 shows a further exemplary embodiment of a switch pole 1 according to the invention, which has the same support frame 2 as the exemplary embodiment according to FIG.
• the insulation is reinforced by additional insulating covers 12 which can be latched into suitable locking grooves, which are not shown in FIG.
• FIG. 3 shows the embodiment according to FIG. 2 in a cross-sectional view.
• the input terminal 3 next to the pole head section 3b shown in FIG. 1 also comprises a longitudinal section 3a.
• the pole head portion 3b is bolted to the fixed contact pin 13 of the vacuum interrupter 6, while the longitudinal portion 3a attached to the pole head portion 3b, for example, is screwed. Over the length of the releasably attached L jossab- section 3a is thus easily the jaw width of
• a the fixed contact pin 13 opposite shift rod 14 is connected via a flexible current band 15 to the outgoing connector 8.
• a pot-shaped insulation 16 is provided, via which the shift rod 14 is connected to the lever mechanism 11.
• the shift rod 14 projects through an end face 17 of a metallic cover 18 of the vacuum interrupter 6, wherein a guide sleeve 19 is firmly connected to the cover 18.
• the end face 17 rests on the holding device 9.
• a further holding device 9 is provided for centering the vacuum interrupter 9 and for controlling the electric field.
• FIG. 4 shows a perspective view of the holding device 9, which has an annular disk-shaped holding section 20 and a flange section 21 extending at right angles thereto.
• the holding portion 20 has a passage opening 22 through which the shift rod 14 and the guide sleeve 19 extend in the installed state. Facing the through-opening 22, centering means in the form of holding brackets 23 arranged parallel to one another are provided which are each set up to receive a threaded plate. In this case, each threaded plate has a threaded screw which extends toward the passage opening 22.
• the flange portion 21 is connected to two claw-shaped support frame fastenings 10, which, as can be seen in Figure 1, are adapted to hold the holding device 9 in the support frame 2.
• FIG. 5 shows the holding device 9 according to FIG. 4 in a cross-sectional view.
• the flange portion 21 consists of a core portion 24 formed integrally with the holding portion 20 and surrounded by a thin-walled insulation 25.
• the holding portion 20 is conductive during operation on the metallic cover 18 of the vacuum interrupter 6, so that a field control element is formed by the core portion 24 and the holding portion 20.
• the holding device 9 has an inner diameter bounded by the flange section 21, which is slightly larger than the outer diameter of the ceramic housing 7 of the vacuum interrupter 6.
• the holding device 9 is designed complementary to the end face of the vacuum interrupter 6 .
• the inner diameter of the through hole 22 is adapted to the outer diameter of the guide sleeve 19, so that it can be passed through the through hole 22.
• the inner diameter of the flange portion 21 is only slightly larger than the outer diameter of the metallic cover 18, but slightly smaller than the outer diameter of the ceramic housing 7 of the vacuum interrupter 6. In other words, form the metallic cover 18 and the ceramic housing. 7 a circumferentially closed circumferential stage of the vacuum interrupter 6, wherein only the metallic cover 18 is received by the flange portion 21 and has a length adapted to this.

Priority Applications (6)

Applications Claiming Priority (1)

Publications (1)

Family

ID=36027591

Family Applications (1)

Country Status (6)

Cited By (3)

Families Citing this family (1)

Citations (3)

• 2005
  • 2005-08-10 WO PCT/DE2005/001436 patent/WO2007016882A1/de active Application Filing
  • 2005-08-10 CN CN2005800512719A patent/CN101238533B/zh active Active
  • 2005-08-10 ES ES05777786.4T patent/ES2436756T3/es active Active
  • 2005-08-10 DE DE112005003725T patent/DE112005003725A5/de not_active Withdrawn
  • 2005-08-10 EP EP05777786.4A patent/EP1913620B1/de active Active
• 2008
  • 2008-11-07 HK HK08112215.6A patent/HK1117640A1/xx not_active IP Right Cessation

Patent Citations (3)

Non-Patent Citations (1)

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