EP2854141A1 - Surge arrester - Google Patents
Surge arrester Download PDFInfo
- Publication number
- EP2854141A1 EP2854141A1 EP13186634.5A EP13186634A EP2854141A1 EP 2854141 A1 EP2854141 A1 EP 2854141A1 EP 13186634 A EP13186634 A EP 13186634A EP 2854141 A1 EP2854141 A1 EP 2854141A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- housing
- surge arrester
- longitudinal axis
- contact element
- 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
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- 238000010168 coupling process Methods 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 3
- 229910018503 SF6 Inorganic materials 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/04—Housings
Definitions
- the invention relates to a surge arrester according to the preamble of patent claim 1.
- Surge arresters are protective systems, for example, for switchgear, which in the event of overvoltages caused by lightning strikes or malfunctions of other subsystems dissipate these overvoltages to ground and thus protect other components of the switchgear.
- Such a surge arrester comprises one or more cylindrical diverting elements, which have a varistor column made up of individual, likewise cylindrical varistor elements.
- Varistor elements are characterized by a voltage-dependent resistance. At low voltages these act as insulators. From a certain threshold voltage, which is material-dependent, they show a good conductivity.
- varistor elements are made of metal oxides such as zinc oxide.
- the diverter is limited at both ends by end fittings that make electrical contact with the switchgear and ground. To ensure a good electrical contact even under mechanical stress, the varistor column must be held together under pressure. This can be done by tension members, for example, ropes or rods are preferably clamped in glass fiber reinforced plastic in the end fittings under train. The tension elements surround the varistor column and thus form a cage around them.
- a fluid-tight housing which surrounds the discharge element.
- the housing is to increase the dielectric strength with a fluid, usually sulfur hexafluoride, filled.
- the housing is usually made of metal and is electrically grounded.
- An end fitting of the Ableit yarn is Grounded via a guided through the housing contact.
- the other end fitting is electrically connected via a passage with a contact located on the outside of the housing, which serves to connect to the switchgear.
- surge arrester must be disconnected from the switchgear because of the high voltages which then occur. Otherwise, the surge arrester would divert the voltage to ground and the measurement result would be corrupted. Because of this, surge arresters sometimes have a disconnecting device, with which the surge arrester can be disconnected from the switchgear.
- the bushing has a high-voltage contact for each diverting element, which establishes a gas-tight electrical connection from the interior of the housing to the exterior of the housing.
- the implementation is often made of cast resin, in which the high-voltage contacts are cast. The position of the contacts is often specified by the operator or manufacturer of the switchgear. So far, the housing with the arrangement of the diverters and possibly the separator had to be constructed thereon.
- a surge arrester is known whose Ableitelement is arranged concentrically to the high voltage contact.
- a movable control hood serves as a separator.
- a surge arrester with three Ableit yarn is known.
- the Ableit yarnlen are arranged radially outwardly offset from the high voltage contacts.
- a guided through the end fitting of the Ableitiata contact element is displaceable by means of a push rod in the axial direction and makes the connection to the high voltage contact or separates them.
- overvoltage arresters have in common that the location and arrangement of the Ableit yarnlen is determined by the geometry of the high voltage contacts.
- the object of the present invention is to provide a surge arrester with more flexible design options.
- a surge arrester has a fluid-tight housing and a discharge element arranged in the fluid-tight housing.
- the diverter element comprises a diverter column made of varistor elements, an end fitting at each of the ends and tension elements clamped in the end fittings and arranged around the diverter column and aligned with its longitudinal axis parallel to the housing axis.
- the surge arrester comprises a bushing with a high voltage contact, which electrically connects the interior with the exterior of the housing (2), and a contact element, which is electrically connected to the discharge element, and via which an electrical connection from the discharge element to the high voltage contact can be produced.
- the contact element is arranged eccentrically to the longitudinal axis and the position of the contact element is adjustable in a plane perpendicular to the longitudinal axis.
- the contact element can be set to different positions of the high voltage contact and / or the diverter can be positioned differently within the setting limits of the contact element with the same position of the Ableitides.
- the surge arrester can be adapted to feedthroughs with different arrangements of high voltage contacts, without this resulting in structural changes to other components.
- the diverting element can be arranged independently of the arrangement of the high-voltage contact, whereby a more flexible construction is made possible.
- the contact element is connected by an eccentric disc with the discharge element.
- the eccentric disk is rotatable about the longitudinal axis.
- the contact element is eccentric on the eccentric, so spaced from the longitudinal axis and mechanically and electrically connected thereto.
- the eccentric disk is made of an electrically conductive material.
- a rotation of the eccentric disc about the longitudinal axis causes a rotation of the contact element about this on a circular path.
- the high voltage contact can now be positioned anywhere on this circular path. If the position of the high-voltage contact and thus of the contact element is fixed, the diverting element can be arranged arbitrarily on the circular path around the contact element.
- the contact element is designed like a pin and inserted in an eccentrically arranged to the longitudinal axis guide bore of the eccentric disc. This opens up constructive degrees of freedom in a particularly simple manner.
- the eccentric disc has a cylindrical recess which is concentric with the longitudinal axis. In this recess an end fitting of the discharge element can be inserted. If end fitting and recess are round, then the eccentric disc can rotate freely around the end fitting. Also possible is a polygonal design of end fitting and recess. Then the eccentric disc can be rotated in steps corresponding to the number of corners around the longitudinal axis of the end fitting.
- the contact element is arranged in both variants on the recess of the opposite side of the eccentric disc. In this way, a rotatable electrical and mechanical connection between the discharge element and the eccentric disc can be produced particularly simply by plugging together.
- the contact element is displaceable parallel to the longitudinal axis by means of a displacement device.
- This is an electrical Connection between diverting element and high-voltage contact can be produced or separated.
- the displacement device is preferably adjustable to different positions of the contact element.
- the contact element in the guide bore of the eccentric disc in the longitudinal direction that is guided parallel to the longitudinal axis, slidably guided.
- a surge arrester with a separator can be constructed much easier, since a changed arrangement of the high voltage contact has no constructive effect on the separator. The adjustment of the separator to the position of the contact element can be easily done during assembly.
- the displacement device has a connecting rod connected to the contact element and a gas-tight from the inside of the housing outwardly and outside the housing by an actuator movable central rod.
- a coupling element with the central rod and the push rod is connected, wherein the coupling element is connected by means of a connecting element with the push rod.
- the connecting element is guided by a guide rod connected to the housing in a direction parallel to the longitudinal axis. This ensures an independent of the discharge element leadership of the connecting element and thus the push rod.
- the guide rod is fixedly connected to a first end of the housing cover. This allows a particularly simple installation.
- a second end of the guide rod inserted through a hole in the connecting element and the connecting element along the guide rod is displaceable. This also serves for easier installation.
- the coupling element has an arm which is connected to the coupling block and inserted into a bore of the connecting element. It attacks the guide rod in a groove of the arm so that the connecting element is fixed in a direction perpendicular to the longitudinal axis direction. This allows a simple mating of the displacement device without gluing, screws or other fixing means.
- an intermediate piece is arranged in the housing, which has a first end fitting which is connected concentrically to the longitudinal axis with the high-voltage contact and a second end fitting which is inserted into a second eccentric disk.
- the contact element is inserted into a second guide bore of the second eccentric disc.
- Means of the intermediate piece can be a housing with a certain length equipped with different lengths of discharge elements. The length compensation takes place by the opposite to the diverting considerably simpler spacers.
- the two eccentric discs are rotatably arranged around the respective end fitting, the contact element connects both. As a result, the diverting element and intermediate piece can be positioned freely relative to one another in a wide range.
- the intermediate piece has a second discharge element.
- the number of varistor elements required for a particular switchgear is thus divided between two diverting elements. The smaller part is arranged in the second discharge element. This simplifies warehousing, since only the smaller intermediate piece in different lengths must be kept in stock.
- the surge arrester has a plurality of diverting elements and a plurality of high-voltage contacts, wherein the number of diverting elements is equal to that of the high-voltage contacts.
- the diverting elements are preferably arranged rotationally symmetrically on a first pitch circle about the housing axis.
- the high-voltage contacts are also preferably rotationally symmetrical arranged on a second pitch circle around the housing axis.
- Each of the diverting elements has an adjustable contact element.
- the contact elements are set so that their position lies on the second pitch circle. Discharge elements and high voltage contacts can thus lie on different pitch circles. With a constant diameter of the first pitch circle, the contact elements are adjustable to different diameters of the second pitch circle.
- the surge arrester with constant arrangement of Ableitiata on bushings with different arrangement of the high voltage contacts is adjustable.
- a fuselage surge arrester so a surge arrester without implementation, prefabricate and assemble with different feedthroughs to a surge arrester by the contact elements are set to the respective arrangement of the high voltage contacts in the implementation during assembly.
- FIGS. 1 and 2 show a surge arrester 1.
- a fluid-tight housing 2 in which the substantially cylindrical housing wall is not shown, here are three discharge elements 5 which are provided for the protection of a three-phase gas-insulated switchgear, in a triangle rotationally symmetrical about a housing axis 50 on a first pitch circle 30 arranged.
- These diverting elements 5 each have a cylindrical discharge column 12, a high-voltage side End fitting 7, a ground-side end fitting 6 and a plurality of tension elements 11.
- the Ableit yarn 12 is composed of individual, also cylindrical Varistorblöcken.
- the end fittings 6, 7 are usually made of electrically conductive material.
- the tension elements 11 are pressed in the end fittings 6, 7 under train and so keep the Ableit yarn 12 together.
- the housing 2 is substantially cylindrical. Along the cylinder axis extends the housing axis 50, which defines an axial direction.
- the discharge element 5 is aligned with its longitudinal axis 40 parallel to this housing axis 50. At the two top surfaces, the housing 2 is closed fluid-tight.
- a ground contact 3 is electrically isolated via a ground-side implementation, not shown, guided by the housing cover 22 from the interior to the exterior of the housing 2 and serves the ground terminal. Inside the housing 2, this ground contact 3 is electrically conductively connected to the diverting element 5. If a plurality of diverting elements 5 are arranged in the housing 2, each diverting element 5 is connected to its own earth contact 3.
- the earth-side end fitting 6 is spaced from the housing cover 22 with an insulating disk 25 and secured to the ground-side bushing.
- the housing cover 22 generally has a connection, not shown here, via which a fluid, for example, sulfur hexafluoride, filled in the housing 2, or can be discharged.
- a fluid for example, sulfur hexafluoride
- the housing 2 may also have other facilities such as a maintenance opening or a burst protection.
- the top surface of the housing 2 is provided with a high voltage feedthrough 14 to the high voltage electrical potential without danger of a rollover between high voltage and earthed housing 2 from the outside into the housing 2 inside to lead.
- the bushing 14 is designed here as a three-pole feedthrough 14, which leads three high voltage contacts 4, insulated against each other and against the housing, into the housing 2.
- the high-voltage contacts 4 are arranged rotationally symmetrically about the housing axis 50 on a second pitch circle 31.
- the surge arrester 1 can be connected to a three-phase gas-insulated switchgear, not shown here.
- the high-voltage contacts 4 protrude into the housing 2.
- they On the inside of the housing 2, they have a blind hole into which a contact element 9 can be inserted.
- an embodiment is possible in which the contact element 9 bears against the inside of the high-voltage contact 4.
- a hood-like eccentric 60 is attached and optionally secured with set screws.
- the eccentric disk 60 has on its underside a cylindrical recess 62, which corresponds in shape and size of the high-voltage side end fitting 7.
- the outer corners and edges of the eccentric disc 60 are rounded to avoid field peaks. If the eccentric disk 60 is plugged onto the high-voltage-side end fitting 7, it can be rotated about a central axis of the diverting element 5 as a rotation axis.
- the contact element 9 is arranged on the outside of the eccentric disc 60 spaced from the axis of rotation.
- the contact element 9 is moved on a circular path about the longitudinal axis 40 and can thereby be adjusted radially to the housing axis 50.
- the eccentric disk 60 is fixed, for example with grub screws on the end fitting 7.
- FIGS. 1 and 2 show surge arrester 1 with different arrangements of the high voltage contacts 4.
- the FIG. 2 have the high voltage contacts to those of FIG. 1 a greater distance from the housing axis 50, accordingly a larger diameter of the second pitch circle 31.
- the arrangement of the diverting elements 5 and thus the diameter of the first pitch circle 30 is the same in both figures.
- the eccentric discs 60 are in the FIG. 2 opposite to those of FIG. 1 rotated according to the larger diameter of the second pitch circle 31 to the outside and thus to the opposite FIG. 1 set different arrangement of the high voltage contacts 9. It is thus possible to install feedthroughs 14 with different arrangements of the high-voltage contacts 9 in the surge arrester 1, without this having any influence on the arrangement of the diverting elements 5.
- FIG. 3 Another embodiment is in FIG. 3 shown.
- the diverter 5 has as in the FIGS. 1 and 2 an eccentric disk 60 around the end fitting 7, on which a contact element 9 is arranged.
- a second discharge element 70 is arranged in the housing 2.
- the second discharge element 70 is connected to the first end fitting 71 with the high-voltage contact 4.
- a toroidal screen 73 around the first end fitting 71 provides a uniform field distribution.
- a second end fitting 72 of the second discharge element 70 is inserted into an eccentric disk 74.
- This eccentric disk 74 has a bore instead of a contact element 9.
- the longitudinal axis of the second discharge element 70 is arranged centrally with the high-voltage contact 4.
- the longitudinal axis of the discharge element 5 is arranged off-center.
- the eccentric discs 60 and 74 can be rotated against each other so that the contact element 9 can be inserted into the bore of the eccentric disc 74.
- the discharge element 5 can be arranged more flexibly on the cover 22 and does not have to be arranged centrally on the cover 22 as before.
- a greater scope for the placement of other components such as the actuator 23, filling devices for the insulating fluid, monitoring devices and the like achieved.
- the second discharge element 70 can also be dispensed with and the eccentric disk 74 can be placed directly on the high-voltage contact 4.
- the surge arrester can be easily adapted to different requirements.
- the number of varistor elements required is determined by the specification of the switchgear inter alia by the voltage level. Previously, different specifications required a diverter element 5 of different lengths. As a result, either the housing 2 had to be adapted to the required length of the discharge element 5, or the discharge element 5 was extended by inserted into the discharge column 12 conductive inserts in order to use a housing 2 of a certain size.
- the fact that the number of required varistor elements is divided into two diverting elements 5, 70 reduces the production and storage costs.
- the second diverter element 70 is prefabricated either in the most commonly required lengths, or made as needed. Since the second discharge element 70 has fewer varistor elements, such as the discharge element 5, only a relatively small component has to be manufactured or held in a certain number of variants. All other components such as the diverter 5, the housing 2 or optionally the actuator 23 remain the same for all or at least several variants and can be made more economical.
- the second diverter element 70 may also be replaced by a cylindrical conductive spacer, for example a metal cylinder. Thus, the same housing size can be used, even if no further varistor elements are required in addition to the varistor elements installed in the diverting element 5.
- FIGS. 1 . 2 and 3 also show an optional separator of a separation point 10 and a displacement device 8 for the contact element 9.
- the separation point 10 can be closed with a contact element 9.
- the contact element 9 is designed as a pin or sleeve cylindrical, and can be moved in a guide bore 26 of the eccentric disc 60 in the axial direction.
- Guide bore 26 and the contact element 9 are coordinated so that both a mechanical guide, as well as a good electrical connection between the contact element 9 and eccentric disc 60 is.
- grinding or sliding contacts such as the contact blades 61 inserted annularly into the contact element 9, can establish the electrical connection. If the contact element 9 is moved to the high-voltage contact 4, then the separation point 10 is closed.
- the eccentric disc 60 is hood-like on the high-voltage side end fitting 7.
- the eccentric disk has for this purpose a cylindrical recess 62 into which the end fitting 7 is inserted.
- the eccentric disc can be rotated about the longitudinal axis 40.
- the inserted into the guide bore 26 contact element 9 then rotates about the discharge element 5.
- the end fitting 7 is completely inserted into the recess 62.
- the outer edges of the eccentric disc 60 are rounded to avoid field peaks.
- the eccentric disc 60 thus ensures at the same time a shielding of the end fitting 7.
- the connection between the contact element 9 and high-voltage contact 4 is designed here as a plug contact.
- the contact element is inserted into a contact bore 63 of the high voltage contact 4.
- Also here provide contact blades 61 for a good mechanical and electrical contact between contact element 9 and high voltage contact. 4
- a displacement device 8 which in the FIG. 5 is shown.
- This has an actuating device 23, a central rod 16, a coupling element 17 and push rods 15.
- the lying outside the housing 2 actuator 23 is connected to the central rod 16 which is guided gas-tight in the housing 2.
- the coupling element 17 is arranged in the interior of the housing 2.
- Central rod 16 and coupling element 17 thereby form a threaded drive by the central rod 16 has an external thread and the coupling element 17 has a corresponding internal thread, for example a trapezoidal thread.
- On the coupling element 17 a radially outwardly pointing arm 19 is arranged per discharge element 5, at the outer end of a connecting element 20 is arranged for receiving the push rods 15.
- the push rods 15 are fixed with one end in this connecting element 20 and connected to the other end with the contact element 9, for example screwed or glued.
- a guide rod 28 is attached, for example screwed as shown here.
- the guide rod 28 projects parallel to the housing axis 50 into the housing 2.
- the other end is inserted into a bore of the connecting element 20.
- the connecting element can thus slide up and down on the guide rod 28 and is thereby guided in the longitudinal direction. If the actuator 23 is rotated, the central rod 16 rotates in the interior of the housing 2 and transmits the rotary movement of the actuator 23 by means of the coupling element 17, the arms 19 and the connecting elements 20 on the push rods 15 and thus on the contact elements 9. Depending on Movement direction while the separation point 10 is opened or closed.
- the holes for the guide rod 28 and the push rod 15 are arranged in the connecting element 20 so that they can be reversed by the connecting element 20 to 180 ° is rotated about the arm 19. In the same position of the guide rod 28, this results in a different position of the push rod 15.
- the eccentric 60 can be adjusted to two positions by only the connecting element 20 is rotated. By replacing the connecting element 20, further positions of the eccentric disk 60 can be adjusted.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Gas-Insulated Switchgears (AREA)
- Details Of Resistors (AREA)
- Thermistors And Varistors (AREA)
Abstract
Die Erfindung betrifft einen Überspannungsableiter (1) mit einem fluiddichten Gehäuse (2), einem in dem fluiddichten Gehäuse (2) angeordneten Ableitelement (5) mit einer Längsachse (40), einem Hochspannungskontakt (4), der das Innere mit dem Äußeren des Gehäuses (2) elektrisch verbindet, und einem Kontaktelement (9), über das eine elektrische Verbindung vom Ableitelement (5) zum Hochspannungskontakt (4) herstellbar ist. Erfindungsgemäß ist das Kontaktelement (9) exzentrisch zur Längsachse (40) angeordnet und die Position des Kontaktelementes (9) in einer Ebene senkrecht zur Längsachse (40) einstellbar. Vorteilhaft lässt sich so das Ableitelement (5) weitgehend unabhängig vom Hochspannungskontakt (4) positionieren.The invention relates to a surge arrester (1) having a fluid-tight housing (2), a discharge element (5) arranged in the fluid-tight housing (2) and having a longitudinal axis (40), a high-voltage contact (4) which connects the interior with the exterior of the housing (2) electrically connects, and a contact element (9), via which an electrical connection from the discharge element (5) to the high voltage contact (4) can be produced. According to the invention, the contact element (9) is arranged eccentrically to the longitudinal axis (40) and the position of the contact element (9) in a plane perpendicular to the longitudinal axis (40) adjustable. Advantageously, the diverting element (5) can thus be positioned largely independently of the high-voltage contact (4).
Description
Die Erfindung betrifft einen Überspannungsableiter gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a surge arrester according to the preamble of patent claim 1.
Überspannungsableiter sind Schutzsysteme beispielsweise für Schaltanlagen, die bei auftretenden Überspannungen durch Blitzeinschlag oder Fehlfunktionen anderer Teilsysteme diese Überspannungen zur Masse hin ableiten und so andere Bauteile der Schaltanlage schützen.Surge arresters are protective systems, for example, for switchgear, which in the event of overvoltages caused by lightning strikes or malfunctions of other subsystems dissipate these overvoltages to ground and thus protect other components of the switchgear.
Ein derartiger Überspannungsableiter umfasst ein oder mehrere zylindrische Ableitelemente, die eine aus einzelnen ebenfalls zylindrischen Varistorelementen aufgebaute Varistorsäule aufweisen. Varistorelemente zeichnen sich durch einen spannungsabhängigen Widerstand aus. Bei niedrigen Spannungen wirken diese als Isolatoren. Ab einer bestimmten Schwellenspannung, die materialabhängig ist, zeigen sie eine gute Leitfähigkeit. Häufig werden Varistorelemente aus Metalloxiden wie Zinkoxid hergestellt. Das Ableitelement wird an beiden Enden von Endarmaturen begrenzt, die den elektrischen Kontakt zur Schaltanlage und zur Masse herstellen. Um einen guten elektrischen Kontakt auch unter mechanischer Belastung zu gewährleisten, muss die Varistorsäule unter Druck zusammengehalten werden. Dies kann erfolgen, indem Zugelemente beispielsweise Seile oder Stäbe vorzugsweise aus glasfaserverstärktem Kunststoff in den Endarmaturen unter Zug eingespannt werden. Die Zugelemente umgeben dabei die Varistorsäule und bilden so einen Käfig um diese.Such a surge arrester comprises one or more cylindrical diverting elements, which have a varistor column made up of individual, likewise cylindrical varistor elements. Varistor elements are characterized by a voltage-dependent resistance. At low voltages these act as insulators. From a certain threshold voltage, which is material-dependent, they show a good conductivity. Frequently, varistor elements are made of metal oxides such as zinc oxide. The diverter is limited at both ends by end fittings that make electrical contact with the switchgear and ground. To ensure a good electrical contact even under mechanical stress, the varistor column must be held together under pressure. This can be done by tension members, for example, ropes or rods are preferably clamped in glass fiber reinforced plastic in the end fittings under train. The tension elements surround the varistor column and thus form a cage around them.
Für den Einsatz in gasisolierten Schaltanlagen weisen Überspannungsableiter ein fluiddichtes Gehäuse auf, das das Ableitelement umgibt. Das Gehäuse ist dabei zur Erhöhung der Durchschlagfestigkeit mit einem Fluid, meist Schwefelhexafluorid, gefüllt. Das Gehäuse besteht meist aus Metall und ist elektrisch geerdet. Eine Endarmatur der Ableitsäule ist über einen durch das Gehäuse geführten Kontakt geerdet. Die andere Endarmatur ist über eine Durchführung mit einem an der Außenseite des Gehäuses befindlichen Kontakt elektrisch verbunden, der dem Anschluss an die Schaltanlage dient.For use in gas-insulated switchgear surge arresters have a fluid-tight housing, which surrounds the discharge element. The housing is to increase the dielectric strength with a fluid, usually sulfur hexafluoride, filled. The housing is usually made of metal and is electrically grounded. An end fitting of the Ableitsäule is Grounded via a guided through the housing contact. The other end fitting is electrically connected via a passage with a contact located on the outside of the housing, which serves to connect to the switchgear.
Soll die Schaltanlage elektrisch getestet werden, so muss wegen der dann auftretenden hohen Spannungen der Überspannungsableiter von der Schaltanlage getrennt werden. Andernfalls würde der Überspannungsableiter die Spannung zur Erde ableiten und das Messergebnis würde verfälscht. Deswegen weisen Überspannungsableiter manchmal eine Trennvorrichtung auf, womit der Überspannungsableiter von der Schaltanlage getrennt werden kann.If the switchgear is to be electrically tested, then the surge arrester must be disconnected from the switchgear because of the high voltages which then occur. Otherwise, the surge arrester would divert the voltage to ground and the measurement result would be corrupted. Because of this, surge arresters sometimes have a disconnecting device, with which the surge arrester can be disconnected from the switchgear.
Die Durchführung weist für jedes Ableitelement einen Hochspannungskontakt auf, der eine gasdichte elektrische Verbindung vom Gehäuseinneren zum Gehäuseäußeren herstellt. Bei gasisolierten Überspannungsableitern ist die Durchführung häufig aus Gießharz, in das die Hochspannungskontakte eingegossen sind. Dis Position der Kontakte wird häufig durch Betreiber oder Hersteller der Schaltanlage vorgegeben. Bislang musste das Gehäuse mit der Anordnung der Ableitelemente sowie gegebenenfalls die Trennvorrichtung darauf hin konstruiert werden.The bushing has a high-voltage contact for each diverting element, which establishes a gas-tight electrical connection from the interior of the housing to the exterior of the housing. In gas-insulated surge arresters, the implementation is often made of cast resin, in which the high-voltage contacts are cast. The position of the contacts is often specified by the operator or manufacturer of the switchgear. So far, the housing with the arrangement of the diverters and possibly the separator had to be constructed thereon.
Aus der
Aus der Anmeldung mit dem Anmeldeaktenzeichen
Allen im Stand der Technik bekannten Überspannungsableitern ist gemeinsam, dass die Lage und Anordnung der Ableitsäulen durch die Geometrie der Hochspannungskontakte bestimmt ist.All known in the art overvoltage arresters have in common that the location and arrangement of the Ableitsäulen is determined by the geometry of the high voltage contacts.
Aufgabe der vorliegenden Erfindung ist es, einen Überspannungsableiter mit flexibleren Konstruktionsmöglichkeiten anzugeben.The object of the present invention is to provide a surge arrester with more flexible design options.
Die Aufgabe wird mit den Mitteln der Erfindung gemäß Patentanspruch 1 gelöst.The object is achieved with the means of the invention according to claim 1.
Dazu weist ein Überspannungsableiter ein fluiddichtes Gehäuse und ein in dem fluiddichten Gehäuse angeordnetes Ableitelement auf. Das Ableitelement umfasst eine Ableitsäule aus Varistorelementen, eine Endarmatur an jedem der Enden und in den Endarmaturen eingespannte und um die Ableitsäule angeordnete Zugelemente und ist mit seiner Längsachse parallel zur Gehäuseachse ausgerichtet. Außerdem umfasst der Überspannungsableiter eine Durchführung mit einem Hochspannungskontakt, der das Innere mit dem Äußeren des Gehäuses (2) elektrisch verbindet, und ein Kontaktelement, das mit dem Ableitelement elektrisch verbunden ist, und über das eine elektrische Verbindung vom Ableitelement zum Hochspannungskontakt herstellbar ist. Erfindungsgemäß ist das Kontaktelement exzentrisch zur Längsachse angeordnet und die Position des Kontaktelementes ist in einer Ebene senkrecht zur Längsachse einstellbar. Somit kann bei gleichbleibender Position des Ableitelementes das Kontaktelement auf unterschiedliche Positionen des Hochspannungskontaktes eingestellt werden und/oder das Ableitelement innerhalb der Einstellgrenzen des Kontaktelementes unterschiedlich positioniert werden. Im ersten Fall kann der Überspannungsableiter auf Durchführungen mit unterschiedlicher Anordnung der Hochspannungskontakte angepasst werden, ohne, dass dies konstruktive Änderungen an anderen Bauteilen zur Folge hat. Im zweiten Fall kann das Ableitelement unabhängig von der Anordnung des Hochspannungskontaktes angeordnet werden, wodurch eine flexiblere Konstruktion ermöglicht wird.For this purpose, a surge arrester has a fluid-tight housing and a discharge element arranged in the fluid-tight housing. The diverter element comprises a diverter column made of varistor elements, an end fitting at each of the ends and tension elements clamped in the end fittings and arranged around the diverter column and aligned with its longitudinal axis parallel to the housing axis. In addition, the surge arrester comprises a bushing with a high voltage contact, which electrically connects the interior with the exterior of the housing (2), and a contact element, which is electrically connected to the discharge element, and via which an electrical connection from the discharge element to the high voltage contact can be produced. According to the invention, the contact element is arranged eccentrically to the longitudinal axis and the position of the contact element is adjustable in a plane perpendicular to the longitudinal axis. Thus, the contact element can be set to different positions of the high voltage contact and / or the diverter can be positioned differently within the setting limits of the contact element with the same position of the Ableitelementes. In the first case, the surge arrester can be adapted to feedthroughs with different arrangements of high voltage contacts, without this resulting in structural changes to other components. In the second case, the diverting element can be arranged independently of the arrangement of the high-voltage contact, whereby a more flexible construction is made possible.
In einer bevorzugten Ausführung der Erfindung ist das Kontaktelement durch eine Exzenterscheibe mit dem Ableitelement verbunden. Die Exzenterscheibe ist dabei um die Längsachse drehbar. Das Kontaktelement ist auf der Exzenterscheibe exzentrisch, also beabstandet zur Längsachse angeordnet und mit ihr mechanisch und elektrisch verbunden. Die Exzenterscheibe ist dabei aus einem elektrisch leitenden Material hergestellt. Eine Drehung der Exzenterscheibe um die Längsachse bewirkt dabei eine Drehung des Kontaktelementes um diese auf einer Kreisbahn. Der Hochspannungskontakt lässt sich nun beliebig auf dieser Kreisbahn positionieren. Liegt die Position des Hochspannungskontaktes und damit des Kontaktelementes fest, lässt sich das Ableitelement beliebig auf der Kreisbahn um das Kontaktelement anordnen. Bevorzugt ist das Kontaktelement stiftartig ausgeführt und in einer exzentrisch zur Längsachse angeordneten Führungsbohrung der Exzenterscheibe eingesteckt. Dies eröffnet auf besonders einfache Weise konstruktive Freiheitsgrade.In a preferred embodiment of the invention, the contact element is connected by an eccentric disc with the discharge element. The eccentric disk is rotatable about the longitudinal axis. The contact element is eccentric on the eccentric, so spaced from the longitudinal axis and mechanically and electrically connected thereto. The eccentric disk is made of an electrically conductive material. A rotation of the eccentric disc about the longitudinal axis causes a rotation of the contact element about this on a circular path. The high voltage contact can now be positioned anywhere on this circular path. If the position of the high-voltage contact and thus of the contact element is fixed, the diverting element can be arranged arbitrarily on the circular path around the contact element. Preferably, the contact element is designed like a pin and inserted in an eccentrically arranged to the longitudinal axis guide bore of the eccentric disc. This opens up constructive degrees of freedom in a particularly simple manner.
In einer vorteilhaften Ausführung der Erfindung weist die Exzenterscheibe eine zylindrische Ausnehmung auf, die konzentrisch zur Längsachse ist. In diese Ausnehmung ist eine Endarmatur des Ableitelementes einsteckbar. Sind Endarmatur und Ausnehmung rund, so lässt sich die Exzenterscheibe frei um die Endarmatur drehen. Möglich ist auch eine mehreckige Ausführung von Endarmatur und Ausnehmung. Dann lässt sich die Exzenterscheibe in Schritten entsprechend der Eckenzahl um die Längsachse der Endarmatur drehen. Das Kontaktelement ist in beiden Varianten auf der der Ausnehmung gegenüber liegenden Seite der Exzenterscheibe angeordnet. Auf diese Weise lässt sich besonders einfach durch Zusammenstecken eine drehbare elektrische und mechanische Verbindung zwischen Ableitelement und Exzenterscheibe herstellen.In an advantageous embodiment of the invention, the eccentric disc has a cylindrical recess which is concentric with the longitudinal axis. In this recess an end fitting of the discharge element can be inserted. If end fitting and recess are round, then the eccentric disc can rotate freely around the end fitting. Also possible is a polygonal design of end fitting and recess. Then the eccentric disc can be rotated in steps corresponding to the number of corners around the longitudinal axis of the end fitting. The contact element is arranged in both variants on the recess of the opposite side of the eccentric disc. In this way, a rotatable electrical and mechanical connection between the discharge element and the eccentric disc can be produced particularly simply by plugging together.
In einer weiteren bevorzugten Ausführung der Erfindung ist das Kontaktelement mittels einer Verschiebeeinrichtung parallel zur Längsachse verschiebbar. Dadurch ist eine elektrische Verbindung zwischen Ableitelement und Hochspannungskontakt herstellbar oder trennbar. Die Verschiebeeinrichtung ist dabei bevorzugt an unterschiedliche Positionen des Kontaktelementes einstellbar. Bevorzugt ist dabei das Kontaktelement in der Führungsbohrung der Exzenterscheibe in Längsrichtung, also parallel zur Längsachse, geführt verschiebbar. Somit lässt sich ein Überspannungsableiter mit einer Trennvorrichtung erheblich einfacher konstruieren, da eine veränderte Anordnung des Hochspannungskontaktes keine konstruktiven Auswirkungen auf die Trennvorrichtung hat. Die Einstellung der Trennvorrichtung an die Position des Kontaktelementes kann leicht bei der Montage erfolgen.In a further preferred embodiment of the invention, the contact element is displaceable parallel to the longitudinal axis by means of a displacement device. This is an electrical Connection between diverting element and high-voltage contact can be produced or separated. The displacement device is preferably adjustable to different positions of the contact element. Preferably, the contact element in the guide bore of the eccentric disc in the longitudinal direction, that is guided parallel to the longitudinal axis, slidably guided. Thus, a surge arrester with a separator can be constructed much easier, since a changed arrangement of the high voltage contact has no constructive effect on the separator. The adjustment of the separator to the position of the contact element can be easily done during assembly.
Vorteilhaft ist auch, dass die Verschiebeeinrichtung eine mit dem Kontaktelement verbundene Schubstange und eine vom Inneren des Gehäuses gasdicht nach außen geführte und außerhalb des Gehäuses durch eine Betätigungseinrichtung bewegbare Zentralstange aufweist. Zur Übertragung einer Bewegung der Betätigungseinrichtung auf das Kontaktelement ist ein Koppelelement mit der Zentralstange und mit der Schubstange verbunden, wobei das Koppelelement mittels eines Verbindungselements mit der Schubstange verbunden ist. Eine solche Trennvorrichtung lässt sich vorteilhaft betätigen, ohne das Gehäuse zu öffnen. Bevorzugt ist das Verbindungselement durch ein mit dem Gehäuse verbundenen Führungsstab in einer Richtung parallel zur Längsachse geführt. Dies gewährleistet eine vom Ableitelement unabhängige Führung des Verbindungselementes und damit der Schubstange. Ebenso bevorzugt ist der Führungsstab mit einem ersten Ende fest mit dem Gehäusedeckel verbunden. Dies erlaubt eine besonders einfache Montage. Weiterhin ist bevorzugt, dass ein zweites Ende des Führungsstabes durch eine Bohrung im Verbindungselement gesteckt und das Verbindungselement entlang des Führungsstabes verschiebbar ist. Auch dies dient der einfacheren Montage.It is also advantageous that the displacement device has a connecting rod connected to the contact element and a gas-tight from the inside of the housing outwardly and outside the housing by an actuator movable central rod. For transmitting a movement of the actuating device on the contact element, a coupling element with the central rod and the push rod is connected, wherein the coupling element is connected by means of a connecting element with the push rod. Such a separation device can be advantageously operated without opening the housing. Preferably, the connecting element is guided by a guide rod connected to the housing in a direction parallel to the longitudinal axis. This ensures an independent of the discharge element leadership of the connecting element and thus the push rod. Also preferably, the guide rod is fixedly connected to a first end of the housing cover. This allows a particularly simple installation. Furthermore, it is preferred that a second end of the guide rod inserted through a hole in the connecting element and the connecting element along the guide rod is displaceable. This also serves for easier installation.
Vorteilhaft ist ebenfalls, dass das Koppelelement einen Arm aufweist, der mit dem Koppelblock verbunden und in eine Bohrung des Verbindungselements eingesteckt ist. Dabei greift der Führungsstab derart in eine Nut des Arms ein, dass das Verbindungselement in einer zur Längsachse senkrechten Richtung festgelegt ist. Dies erlaubt ein einfaches Zusammenstecken der Verschiebeeinrichtung ohne Kleben, Schrauben oder andere Fixierungsmittel.It is also advantageous that the coupling element has an arm which is connected to the coupling block and inserted into a bore of the connecting element. It attacks the guide rod in a groove of the arm so that the connecting element is fixed in a direction perpendicular to the longitudinal axis direction. This allows a simple mating of the displacement device without gluing, screws or other fixing means.
Bevorzugt wird auch, dass in dem Gehäuse ein Zwischenstück angeordnet ist, das eine erste Endarmatur, die konzentrisch zur Längsachse mit dem Hochspannungskontakt verbunden ist und eine zweite Endarmatur, die in eine zweite Exzenterscheibe eingesteckt ist, aufweist. Dabei ist das Kontaktelement in eine zweite Führungsbohrung der zweiten Exzenterscheibe eingesteckt. Mittel des Zwischenstücks lässt ein Gehäuse mit einer bestimmten Länge mit unterschiedlich langen Ableitelementen bestücken. Der Längenausgleich erfolgt dabei durch die gegenüber den Ableitelementen erheblich einfacheren Zwischenstücken. Die beiden Exzenterscheiben sind drehbar um die jeweilige Endarmatur angeordnet, das Kontaktelement verbindet beide. Dadurch lassen sich Ableitelement und Zwischenstück in einem weiten Bereich frei zueinander positionieren.It is also preferred that an intermediate piece is arranged in the housing, which has a first end fitting which is connected concentrically to the longitudinal axis with the high-voltage contact and a second end fitting which is inserted into a second eccentric disk. In this case, the contact element is inserted into a second guide bore of the second eccentric disc. Means of the intermediate piece can be a housing with a certain length equipped with different lengths of discharge elements. The length compensation takes place by the opposite to the diverting considerably simpler spacers. The two eccentric discs are rotatably arranged around the respective end fitting, the contact element connects both. As a result, the diverting element and intermediate piece can be positioned freely relative to one another in a wide range.
In einer vorteilhaften Ausführung weist das Zwischenstück ein zweites Ableitelement auf. Die für eine bestimmte Schaltanlage benötigte Anzahl der Varistorelemente wird so auf zwei Ableitelemente aufgeteilt. Der kleinere Teil ist dabei im zweiten Ableitelement angeordnet. Das vereinfacht die Lagerhaltung, da nur das kleinere Zwischenstück in verschiedenen Längen vorrätig gehalten werden muss.In an advantageous embodiment, the intermediate piece has a second discharge element. The number of varistor elements required for a particular switchgear is thus divided between two diverting elements. The smaller part is arranged in the second discharge element. This simplifies warehousing, since only the smaller intermediate piece in different lengths must be kept in stock.
Weiterhin ist vorteilhaft, dass der Überspannungsableiter mehrere Ableitelemente und mehrere Hochspannungskontakte aufweist, wobei die Anzahl der Ableitelemente gleich der der Hochspannungskontakte ist. Die Ableitelemente sind dabei bevorzugt rotationssymmetrisch auf einem ersten Teilkreis um die Gehäuseachse angeordnet. Die Hochspannungskontakte sind ebenfalls bevorzugt rotationssymmetrisch auf einen zweiten Teilkreis um die Gehäuseachse angeordnet. Jedes der Ableitelemente weist ein einstellbares Kontaktelement auf. Die Kontaktelemente sind derart eingestellt, dass ihre Position auf dem zweiten Teilkreis liegt. Ableitelemente und Hochspannungskontakte können so auf unterschiedlichen Teilkreisen liegen. Bei gleichbleibendem Durchmesser des ersten Teilkreises sind die Kontaktelemente so an unterschiedliche Durchmesser des zweiten Teilkreises einstellbar. Somit ist der Überspannungsableiter bei gleichbleibender Anordnung der Ableitelemente an Durchführungen mit unterschiedlicher Anordnung der Hochspannungskontakte einstellbar. Dadurch lässt sich ein Rumpfüberspannungsableiter, also ein Überspannungsableiter ohne Durchführung, vorfertigen und mit unterschiedlichen Durchführungen zu einem Überspannungsableiter montieren, indem bei der Montage die Kontaktelemente an die jeweilige Anordnung der Hochspannungskontakte in der Durchführung eingestellt werden.Furthermore, it is advantageous that the surge arrester has a plurality of diverting elements and a plurality of high-voltage contacts, wherein the number of diverting elements is equal to that of the high-voltage contacts. The diverting elements are preferably arranged rotationally symmetrically on a first pitch circle about the housing axis. The high-voltage contacts are also preferably rotationally symmetrical arranged on a second pitch circle around the housing axis. Each of the diverting elements has an adjustable contact element. The contact elements are set so that their position lies on the second pitch circle. Discharge elements and high voltage contacts can thus lie on different pitch circles. With a constant diameter of the first pitch circle, the contact elements are adjustable to different diameters of the second pitch circle. Thus, the surge arrester with constant arrangement of Ableitelemente on bushings with different arrangement of the high voltage contacts is adjustable. As a result, a fuselage surge arrester, so a surge arrester without implementation, prefabricate and assemble with different feedthroughs to a surge arrester by the contact elements are set to the respective arrangement of the high voltage contacts in the implementation during assembly.
Im Folgenden wird die Erfindung anhand der Zeichnungen näher erläutert. Dabei zeigen:
- Figuren 1 und 2
- einen erfindungsgemäßen Überspannungsableiter,
- Figur 3
- eine weitere Ausführungsform eines erfindungsgemäßen Überspannungsableiters,
Figur 4- eine Schnittdarstellung im Bereich des Hochspannungskontaktes
Figur 5- eine Detaildarstellung einer Verschiebeeinrichtung
- Figures 1 and 2
- a surge arrester according to the invention,
- FIG. 3
- a further embodiment of a surge arrester according to the invention,
- FIG. 4
- a sectional view in the region of the high voltage contact
- FIG. 5
- a detailed representation of a displacement device
Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.
Die
Das Gehäuse 2 ist im Wesentlichen zylinderförmig. Entlang der Zylinderachse erstreckt sich die Gehäuseachse 50, die eine axiale Richtung definiert. Das Ableitelement 5 mit seiner Längsachse 40 parallel zu dieser Gehäuseachse 50 ausgerichtet. An den beiden Deckflächen ist das Gehäuse 2 fluiddicht verschlossen.The
Auf einer Erdanschlussseite des Ableitelementes 5 ist die Deckfläche des Gehäuses 2 mit einem Gehäusedeckel 22 verschlossen. Ein Erdkontakt 3 ist über eine nicht dargestellte erdseitige Durchführung elektrisch isoliert durch den Gehäusedeckel 22 vom Inneren zum Äußeren des Gehäuses 2 geführt und dient dem Erdungsanschluss. Im Inneren des Gehäuses 2 ist dieser Erdkontakt 3 elektrisch leitend mit dem Ableitelement 5 verbunden. Sind im Gehäuse 2 mehrere Ableitelemente 5 angeordnet, ist jedes Ableitelement 5 mit einem eigenen Erdkontakt 3 verbunden. Die erdseitige Endarmatur 6 ist mit einer Isolierscheibe 25 vom Gehäusedeckel 22 beabstandet und an der erdseitigen Durchführung befestigt. Der Gehäusedeckel 22 weist in der Regel einen hier nicht dargestellten Anschluss auf, über den ein Fluid, beispielsweise Schwefelhexafluorid, in das Gehäuse 2 eingefüllt, beziehungsweise abgelassen werden kann. Das Gehäuse 2 kann außerdem weitere Einrichtungen wie eine Wartungsöffnung oder einen Berstschutz aufweisen.On a ground terminal side of the
Auf einer Hochspannungsanschlussseite des Ableitelementes 5 ist die Deckfläche des Gehäuses 2 mit einer Hochspannungsdurchführung 14 versehen, um das elektrische Hochspannungspotential ohne Gefahr eines Überschlags zwischen Hochspannung und geerdetem Gehäuse 2 von außen in das Gehäuse 2 hinein zu führen. Die Durchführung 14 ist hier als dreipolige Durchführung 14 ausgeführt, die drei gegeneinander und gegen das Gehäuse isolierte Hochspannungskontakte 4 in das Gehäuse 2 hinein führt. Die Hochspannungskontakte 4 sind rotationssymmetrisch um die Gehäuseachse 50 auf einem zweiten Teilkreis 31 angeordnet. Über die Hochspannungskontakte 4 kann der Überspannungsableiter 1 an eine hier nicht dargestellte dreiphasige gasisolierte Schaltanlage angeschlossen werden. Im Inneren des Gehäuses 2 ragen die Hochspannungskontakte 4 in das Gehäuse 2 hinein. Auf der Innenseite des Gehäuses 2 weisen sie ein Sackloch auf, in das ein Kontaktelement 9 einsteckbar ist. Alternativ ist eine Ausführung möglich, in der das Kontaktelement 9 an der Innenseite des Hochspannungskontaktes 4 anliegt.On a high voltage terminal side of the
Auf die hochspannungsseitige Endarmatur 7 ist eine haubenartige Exzenterscheibe 60 aufgesteckt und gegebenenfalls mit Madenschrauben gesichert. Die Exzenterscheibe 60 weist dazu auf ihrer Unterseite eine zylindrische Ausnehmung 62 auf, die in Form und Größe der hochspannungsseitigen Endarmatur 7 entspricht. Die außenliegenden Ecken und Kanten der Exzenterscheibe 60 sind abgerundet, um Feldspitzen zu vermeiden. Ist die Exzenterscheibe 60 auf die hochspannungsseitige Endarmatur 7 aufgesteckt, lässt sie sich um eine Mittelachse des Ableitelementes 5 als Drehachse verdrehen. Das Kontaktelement 9 ist auf der Außenseite der Exzenterscheibe 60 beabstandet von der Drehachse angeordnet. Durch eine Verdrehung der Exzenterscheibe 60 wird das Kontaktelement 9 auf einer Kreisbahn um die Längsachse 40 bewegt und kann dadurch radial zur Gehäuseachse 50 verstellt werden. In der gewünschten Position des Kontaktelementes 9 wird die Exzenterscheibe 60 beispielsweise mit Madenschrauben an der Endarmatur 7 fixiert. Somit kann der Überspannungsableiter 1 auf einfache Weise an unterschiedliche Anordnungen der Hochspannungskontakte 4 angepasst werden, ohne dass die Anordnung der Ableitelemente 5 verändert werden müsste.On the high-voltage side end fitting 7 a hood-like eccentric 60 is attached and optionally secured with set screws. The
Die
Eine weitere Ausführungsform ist in der
Auf das zweite Ableitelement 70 kann jedoch auch verzichtet und die Exzenterscheibe 74 direkt auf den Hochspannungskontakt 4 aufgesetzt werden. Durch das zweite Ableitelement 70 kann jedoch der Überspannungsableiter leicht auf unterschiedliche Anforderungen angepasst werden. Die Anzahl der benötigten Varistorelemente ist durch die Spezifikation der Schaltanlage unter anderem durch das Spannungsniveau festgelegt. Bisher erforderten unterschiedliche Spezifikationen ein Ableitelement 5 unterschiedlicher Länge. Dadurch musste entweder das Gehäuse 2 an die geforderte Länge des Ableitelements 5 angepasst werden, oder das Ableitelement 5 wurde durch in die Ableitsäule 12 eingesetzte leitende Einlegeteile verlängert, um ein Gehäuse 2 einer bestimmten Größe nutzen zu können. Dadurch, dass die Anzahl der benötigten Varistorelemente auf zwei Ableitelemente 5, 70 aufgeteilt wird, reduziert sich der Fertigungs- und Lagerhaltungsaufwand. Es wird ein Ableitelement 5, dessen Länge der kleinsten vorkommenden Länge entspricht, vorgefertigt. Das zweite Ableitelement 70 wird entweder in den am häufigsten benötigten Längen vorgefertigt, oder bei Bedarf angefertigt. Da das zweite Ableitelement 70 weniger Varistorelemente aufweist, wie das Ableitelement 5, muss nur ein relativ kleines Bauteil in einer gewissen Variantenanzahl gefertigt beziehungsweise vorgehalten werden. Alle anderen Bauelemente wie das Ableitelement 5, das Gehäuse 2 oder gegebenenfalls die Betätigungseinrichtung 23 bleiben bei allen oder zumindest mehreren Varianten gleich und können so wirtschaftlicher hergestellt werden. Das zweite Ableitelement 70 kann auch durch ein zylindrisches leitendes Zwischenstück ersetzt werden, zum Beispiel einen Metallzylinder. Somit kann dieselbe Gehäusegröße verwendet werden, auch wenn neben den im Ableitelement 5 verbauten Varistorelementen keine weiteren Varistorelemente benötigt werden.However, the second discharge element 70 can also be dispensed with and the
Die
Wie in
Die Bewegung des Kontaktelementes 9 geschieht mittels einer Verschiebeeinrichtung 8, die in der
Die Bohrungen für den Führungsstab 28 und die Schubstange 15 sind in dem Verbindungselement 20 so angeordnet, dass sie vertauscht werden können, indem das Verbindungselement 20 um 180° um den Arm 19 gedreht wird. Bei gleichbleibender Position des Führungsstabes 28 ergibt sich dadurch eine andere Position der Schubstange 15. Somit lässt sich die Exzenterscheibe 60 auf zwei Positionen einstellen, indem lediglich das Verbindungselement 20 verdreht wird. Durch Austausch des Verbindungselementes 20 lassen sich weitere Positionen der Exzenterscheibe 60 einstellen.The holes for the
Claims (9)
dadurch gekennzeichnet, dass
das Kontaktelement (9) exzentrisch zur Längsachse (40) angeordnet ist und eine Position des Kontaktelementes (9) in einer Ebene senkrecht zur Längsachse (40) einstellbar ist.
characterized in that
the contact element (9) is arranged eccentrically to the longitudinal axis (40) and a position of the contact element (9) in a plane perpendicular to the longitudinal axis (40) is adjustable.
dadurch gekennzeichnet, dass
das Kontaktelement (9) durch eine Exzenterscheibe (60) mit dem Ableitelement (5) verbunden ist, die um die Längsachse (40) drehbar ist.Surge arrester (1) according to claim 1,
characterized in that
the contact element (9) is connected by an eccentric disc (60) to the diverting element (5), which is rotatable about the longitudinal axis (40).
dadurch gekennzeichnet, dass
die Exzenterscheibe (60) konzentrisch zur Längsachse (40) eine zylindrische Ausnehmung (62) aufweist, in die eine Endarmatur (7) des Ableitelements (5) derart einsteckbar ist, dass die Exzenterscheibe (60) um die Endarmatur (7) drehbar ist.Surge arrester (1) according to Claim 2,
characterized in that
the eccentric disc (60) concentric with the longitudinal axis (40) has a cylindrical recess (62) into which an end fitting (7) of the discharge element (5) can be inserted such that the eccentric disc (60) is rotatable about the end fitting (7).
dadurch gekennzeichnet, dass
das Kontaktelement (9) mittels einer Verschiebeeinrichtung (8) zum Herstellen oder Trennen einer elektrischen Verbindung zwischen Ableitelement (5) und Hochspannungskontakt (4) parallel zur Längsachse (40) verschiebbar ist.Surge arrester (1) according to one of Claims 1 to 3,
characterized in that
the contact element (9) can be displaced parallel to the longitudinal axis (40) by means of a displacement device (8) for producing or separating an electrical connection between the discharge element (5) and the high-voltage contact (4).
dadurch gekennzeichnet, dass
die Verschiebeeinrichtung (8) eine mit dem Kontaktelement (9) verbundene Schubstange (15) und eine vom Inneren des Gehäuses (2) gasdicht nach außen geführte und außerhalb des Gehäuses (2) durch eine Betätigungseinrichtung (23) bewegbare Zentralstange (16) aufweist, wobei zur Übertragung einer Bewegung der Betätigungseinrichtung (23) auf das Kontaktelement (9) ein Koppelelement (17) mit der Zentralstange (16) und mit der Schubstange (15) verbunden ist, und wobei das Koppelelement (17) mittels eines Verbindungselements (20) mit der Schubstange (15) verbunden ist.Surge arrester (1) according to Claim 4,
characterized in that
the displacement device (8) has a connecting rod (15) connected to the contact element (9) and a central rod (16) which is guided gas-tight outwardly from the interior of the housing (2) and movable outside the housing (2) by an actuating device (23), wherein for transmitting a movement of the actuating device (23) to the contact element (9) a coupling element (17) with the central rod (16) and the push rod (15) is connected, and wherein the coupling element (17) by means of a connecting element (20) is connected to the push rod (15).
dadurch gekennzeichnet, dass
das Koppelelement (17) einen Arm (19) aufweist, der in eine Bohrung des Verbindungselements (20) eingesteckt ist, wobei ein Führungsstab (28) derart in eine Nut des Arms (19) eingreift, dass das Verbindungselement (20) in einer zur Längsachse (40) senkrechten Richtung festgelegt ist.Surge arrester (1) according to Claim 5,
characterized in that
the coupling element (17) has an arm (19) which is inserted into a bore of the connecting element (20), wherein a guide rod (28) engages in a groove of the arm (19) in such a way that the connecting element (20) in one of Longitudinal axis (40) vertical direction is fixed.
gekennzeichnet durch
ein in dem Gehäuse (2) angeordnetes Zwischenstück (70) mit einer ersten Endarmatur (71), die konzentrisch zur Längsachse (40) mit dem Hochspannungskontakt (4) verbunden ist und mit einer zweite Endarmatur (72), die in eine zweite Exzenterscheibe (74) eingesteckt ist, wobei das Kontaktelement (9) in eine zweite Führungsbohrung (26) der zweiten Exzenterscheibe (74) eingesteckt ist.Surge arrester (1) according to one of Claims 1 to 6,
marked by
an intermediate piece (70) arranged in the housing (2), having a first end fitting (71) which is connected concentrically to the longitudinal axis (40) to the high-voltage contact (4) and a second end fitting (72) which is inserted into a second eccentric disk (72). 74) is inserted, wherein the contact element (9) in a second guide bore (26) of the second eccentric disc (74) is inserted.
dadurch gekennzeichnet, dass
das Zwischenstück (70) ein zweites Ableitelement aufweist.Surge arrester (1) according to claim 7,
characterized in that
the intermediate piece (70) has a second discharge element.
mehrere, auf einem ersten Teilkreis (30) um die Gehäuseachse (50) angeordnete Ableitelemente (5) mit jeweils einem einstellbaren Kontaktelement (9) und mehrere, auf einem zweiten Teilkreis (31) um die Gehäuseachse (50) angeordnete Hochspannungskontakte(4), wobei die Kontaktelemente (9) derart eingestellt sind, dass ihre Position auf dem zweiten Teilkreis (31) liegt.Surge arrester (1) according to one of Claims 1 to 8 marked by
a plurality of discharge elements (5) arranged on a first pitch circle (30) about the housing axis (50), each having an adjustable contact element (9) and a plurality of high-voltage contacts (4) arranged on a second pitch circle (31) about the housing axis (50), wherein the contact elements (9) are set such that their position lies on the second pitch circle (31).
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK13186634.5T DK2854141T3 (en) | 2013-09-30 | 2013-09-30 | An arrester |
EP13186634.5A EP2854141B1 (en) | 2013-09-30 | 2013-09-30 | Surge arrester |
PL13186634T PL2854141T3 (en) | 2013-09-30 | 2013-09-30 | Surge arrester |
KR1020167008009A KR101955078B1 (en) | 2013-09-30 | 2014-09-25 | Surge arrester |
JP2016544754A JP6279088B2 (en) | 2013-09-30 | 2014-09-25 | Surge arrester |
PCT/EP2014/070482 WO2015044265A1 (en) | 2013-09-30 | 2014-09-25 | Surge arrester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13186634.5A EP2854141B1 (en) | 2013-09-30 | 2013-09-30 | Surge arrester |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2854141A1 true EP2854141A1 (en) | 2015-04-01 |
EP2854141B1 EP2854141B1 (en) | 2020-03-25 |
Family
ID=49263206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13186634.5A Active EP2854141B1 (en) | 2013-09-30 | 2013-09-30 | Surge arrester |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2854141B1 (en) |
JP (1) | JP6279088B2 (en) |
KR (1) | KR101955078B1 (en) |
DK (1) | DK2854141T3 (en) |
PL (1) | PL2854141T3 (en) |
WO (1) | WO2015044265A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3131098A1 (en) * | 2015-08-12 | 2017-02-15 | Siemens Aktiengesellschaft | Enclosed surge voltage protector |
WO2017182244A1 (en) * | 2016-04-19 | 2017-10-26 | Siemens Aktiengesellschaft | Assembly for the overvoltage protection of an electric system which is insulated with an insulating fluid |
EP3514899A4 (en) * | 2016-09-16 | 2020-05-27 | Kabushiki Kaisha Toshiba | Lightning arrester |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113451980A (en) * | 2021-08-16 | 2021-09-28 | 西门子能源国际公司 | Lightning arrester |
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WO2008028724A1 (en) * | 2006-09-07 | 2008-03-13 | Dehn + Söhne Gmbh + Co. Kg | Surge arrester having a housing and having at least one arresting element |
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DE102012217310A1 (en) | 2012-09-25 | 2014-03-27 | Siemens Aktiengesellschaft | Surge arresters |
-
2013
- 2013-09-30 EP EP13186634.5A patent/EP2854141B1/en active Active
- 2013-09-30 PL PL13186634T patent/PL2854141T3/en unknown
- 2013-09-30 DK DK13186634.5T patent/DK2854141T3/en active
-
2014
- 2014-09-25 JP JP2016544754A patent/JP6279088B2/en active Active
- 2014-09-25 WO PCT/EP2014/070482 patent/WO2015044265A1/en active Application Filing
- 2014-09-25 KR KR1020167008009A patent/KR101955078B1/en active IP Right Grant
Patent Citations (4)
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WO2008028724A1 (en) * | 2006-09-07 | 2008-03-13 | Dehn + Söhne Gmbh + Co. Kg | Surge arrester having a housing and having at least one arresting element |
WO2011012297A1 (en) | 2009-07-30 | 2011-02-03 | F. Hoffmann-La Roche Ag | Enzymatic antibody processing |
WO2011054524A1 (en) * | 2009-11-05 | 2011-05-12 | Phoenix Contact Gmbh & Co. Kg | Overvoltage protection element |
WO2012168112A1 (en) | 2011-06-10 | 2012-12-13 | Siemens Aktiengesellschaft | Surge arrestor |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3131098A1 (en) * | 2015-08-12 | 2017-02-15 | Siemens Aktiengesellschaft | Enclosed surge voltage protector |
WO2017182244A1 (en) * | 2016-04-19 | 2017-10-26 | Siemens Aktiengesellschaft | Assembly for the overvoltage protection of an electric system which is insulated with an insulating fluid |
KR20180132894A (en) * | 2016-04-19 | 2018-12-12 | 지멘스 악티엔게젤샤프트 | An assembly for overvoltage protection of an electrical system insulated with an insulating fluid |
CN109313995A (en) * | 2016-04-19 | 2019-02-05 | 西门子股份公司 | For carrying out the device of overvoltage protection to the electric utility to insulate using dielectric |
EP3514899A4 (en) * | 2016-09-16 | 2020-05-27 | Kabushiki Kaisha Toshiba | Lightning arrester |
Also Published As
Publication number | Publication date |
---|---|
KR101955078B1 (en) | 2019-03-06 |
EP2854141B1 (en) | 2020-03-25 |
DK2854141T3 (en) | 2020-06-02 |
WO2015044265A1 (en) | 2015-04-02 |
KR20160046905A (en) | 2016-04-29 |
JP6279088B2 (en) | 2018-02-14 |
JP2016537826A (en) | 2016-12-01 |
PL2854141T3 (en) | 2020-08-24 |
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