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EP2846333A1 - Paratonnerre isolé du gaz - Google Patents

Paratonnerre isolé du gaz Download PDF

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Publication number
EP2846333A1
EP2846333A1 EP20130183563 EP13183563A EP2846333A1 EP 2846333 A1 EP2846333 A1 EP 2846333A1 EP 20130183563 EP20130183563 EP 20130183563 EP 13183563 A EP13183563 A EP 13183563A EP 2846333 A1 EP2846333 A1 EP 2846333A1
Authority
EP
European Patent Office
Prior art keywords
contact
cylinder axis
pressure plate
surge arrester
shoulder
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.)
Withdrawn
Application number
EP20130183563
Other languages
German (de)
English (en)
Inventor
Markus Sulitze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP20130183563 priority Critical patent/EP2846333A1/fr
Priority to PCT/EP2014/068167 priority patent/WO2015032671A1/fr
Publication of EP2846333A1 publication Critical patent/EP2846333A1/fr
Withdrawn legal-status Critical Current

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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
    • 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

  • Surge arresters are protective systems, for example for high-voltage or medium-voltage switchgear, which dissipate these overvoltages to ground in the event of overvoltages due to lightning strikes or malfunctions of other subsystems and thus protect other components of the switchgear.
  • Such a surge arrester comprises one or more active parts with cylindrical diverting elements which have a varistor column constructed from individual, likewise cylindrical varistor elements, which extends along the cylinder axis.
  • 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 delivery column is grounded via a contact made through the housing.
  • the another end fitting is electrically connected via a housing feedthrough with a located on the outside of the housing high-voltage contact, which serves to connect to the switchgear.
  • the tension elements are previously bolted in the end fittings.
  • the ends of the tension elements usually rods made of glass fiber reinforced plastic, for this purpose have a thread which is inserted into an opening of the end fitting.
  • a threaded bushing is inserted into the opening and screwed onto the thread of the tension element.
  • the tension element is thereby tensioned.
  • the end fitting is usually made of metal and holds together with the tension elements screwed therein the active part, at the same time it serves the electrical connection of the active part to a housing feedthrough.
  • the heads of the threaded bushings must be relatively large, since they have to transmit considerable torque.
  • the WO 2012/168112 A1 shows a gas-insulated surge arrester, in which the tension elements are screwed into the end fittings.
  • the end fittings are solid and have a radial extent that significantly exceeds that of the discharge element.
  • the DE 10 2008 048 840 A1 shows an outdoor exhaust, in which the tension elements are braced in solid end fittings with wedges.
  • the object of the invention is to provide a surge arrester, which is compact and easy to assemble.
  • a surge arrester with a fluid-tight housing in which an active part is arranged, is provided for this purpose.
  • the active part has a cylindrical discharge element extending along a cylinder axis between a ground connection side and a high voltage connection side, a plurality of tension elements arranged radially around the discharge element made of an electrically insulating material, for example glass fiber reinforced plastic, and two end fittings arranged at the ends of the discharge element, in which the tension elements under train directly, so without additional fasteners are braced.
  • each of the end fittings has for this purpose an annular retaining element.
  • the cross-section of the support member is substantially L-shaped, with a shoulder extending radially inwardly of the cylinder axis and a leg extending parallel to the cylinder axis, with the legs of the two end fittings facing each other. The tension elements are clamped in the legs.
  • each end fitting has an inserted into the annular support member between the shoulder and the discharge element contact arrangement with a pressure plate, a contact plate and a spring element arranged between them.
  • the contact arrangement is inserted in such a manner in the annular holding element that the shoulder on the pressure plate supported.
  • the holding element in this case has a purely mechanical function, it can be made of any material, but will usually consist of a tensile metal such as steel. But it is also conceivable to produce the retaining element of a different material such as glass fiber reinforced plastic.
  • the contact arrangement serves on the one hand to transmit the tensile force of the tension elements to the discharge element, on the other hand, the electrical connection of the discharge element with a ground contact, or a high voltage contact.
  • All components of the end fittings can be designed rotationally symmetrical, since no forces must be transferred to the discharge element.
  • Such an end fitting is particularly compact to build both in the radial direction, as well as in the axial direction and easy to assemble.
  • the pressure plate has a centering pin extending along the cylinder axis, which penetrates through an opening in the spring element into a centering opening in the contact plate.
  • a centering of the components of the contact arrangement is achieved and facilitates the assembly.
  • the contact plate has an extending through an annular opening of the holding element approach with a bore into which a feedthrough bolt a ground-side implementation or a contact of a high-voltage side separation device can be inserted.
  • the bore is arranged coaxially with the cylinder axis.
  • the bore has an internal thread and the feedthrough bolt on an external thread and pressure plate and bushing bolts are bolted together.
  • an advantageous embodiment of the invention that is arranged around the contact arrangement of the high-voltage terminal side a shield cap which is electrically connected via a extending through the annular opening spring contact with the pressure plate, wherein the shield hood is pressed by the spring contact against a high voltage contact.
  • the active part is pressed against the high voltage contact and thus fixed its longitudinal axis and at the same time an electrical contact is made to the high voltage contact.
  • the active part is radially fixed by the umbrella hood. This avoids having to handle the inside of the housing, which is difficult to access during installation.
  • the shielding hood has a connecting bolt extending along the cylinder axis, which can be inserted into a corresponding contact bore of a high-voltage contact of a high-voltage feedthrough.
  • the active part is thereby centered and fixed against radial deflection.
  • FIG. 1 shows an inventive surge arrester 1.
  • An enclosed fluid-tight housing 40 has a tubular housing wall 41 with flanges 42 at the tube ends. On the flanges 42, a high-voltage feedthrough 44 is fixed on a high-voltage connection side 30 and a cover 43 is fastened in a fluid-tight manner on the ground connection side 31.
  • the housing 40 consists essentially of an electrically conductive material such as steel or aluminum and is grounded during operation.
  • the lid 43 is a simple plate of metal, for example, and may have a pressure relief port 45 which is closed with a rupture disk or membrane, not shown. Furthermore, the cover 43 for each disposed in the housing 40 active part 2 an opening for a ground-side passage 21.
  • the high-voltage bushing 44 consists of a frame 47 with an insulating part 46 made of an electrically insulating material such as cast resin, in which a high-voltage contact 24 is used for each of the active parts 2 arranged in the housing 40.
  • a high-voltage contact 24 is used for each of the active parts 2 arranged in the housing 40.
  • the high voltage electrical potential without danger of a rollover between high voltage and grounded housing 40 are guided from the outside into the housing 40 into it.
  • each active part 2 has a cylindrical discharge element 20 extending along a cylinder axis 26.
  • the diverting element 20 is usually formed as a stack of cylindrical varistor elements with a voltage-dependent resistor.
  • an end fitting 3, 4 is arranged in each case.
  • the tension elements 26 serve to press the varistor elements together to produce a good electrical contact between them and hold the stack together. They also serve to secure the stack against slippage of the varistor elements, for example during transport.
  • the end fitting 3 is attached directly to a feedthrough pin 23 or preferably screwed.
  • the feedthrough pin 23 represents the earth contact.
  • a shield cap 27 is arranged concentrically around the end fitting 4. It serves to shield the corners or edges of the end fitting 4 from the electric fields of the high voltage.
  • FIG. 2 shows this page in detail.
  • the end fitting 4 here comprises an annular retaining element 5 with an L-shaped cross-section with a shoulder 26 which extends radially inward to the cylinder axis 26 and a leg 7 which extends parallel to the cylinder axis 26.
  • the leg 7 points in the direction of the discharge element 20 and in the direction of the opposite end fitting 3.
  • the ring opening 19 has a diameter which corresponds to that of the discharge element 20 and, in the region of the shoulder 6, a diameter which is reduced in diameter.
  • Through the leg 7 through holes 26 are arranged parallel to the cylinder axis, in which tension elements 13 are received and pressed, for example, are crimped.
  • the tension elements 13 are inserted into the holes, biased and the Garelemement 5 plastically deformed in a press so that the tension elements 13 are firmly connected to the holding element 5.
  • an insert plates 15 can still be inserted.
  • the bias of the tension elements 13 exerts a force on the holding element 5, which is supported with its shoulder 6 on the pressure plate 9. About this, the force on the spring element 11 and the contact plate 10 and optionally the insert plate 15 is transferred to the discharge element 20.
  • the end fitting 3 on the ground terminal side 31 is constructed equivalently. Such an end fitting 3, 4 is built very compact. It projects radially beyond the discharge element 20 by only about twice the diameter of the pulling element 13. In addition, it can be manufactured from low-cost turned parts, since all components are rotationally symmetrical.
  • the contact assembly 8 ensures a uniform distribution of force on the end face of the discharge element 20.
  • the optional insert plate 15, which is made of a softer material than the contact plate 10 additionally prevents 10 local force peaks occur by edges or ridges on the contact plate, which is brittle Discharge element 20 could damage.
  • the pressure plate 9 in its center on a in the direction of the cylinder axis 26 extending centering pin 12, which passes through an opening in the spring member 11 into a centering hole 14 of the contact plate 10.
  • pressure plate 9, spring element 11 and contact plate 10 are centered to each other and can not move against each other.
  • a hood-like shield cap 27 is arranged to the end fitting 4 on the high voltage terminal side. This shields the end fitting 4, in particular its corners and edges, against the high voltage.
  • a spring contact 18 is arranged in the form of a helical spring. The spring contact 18 extends thereby through the ring opening 19 in the region of the shoulder 6 through the holding element 5 therethrough. It electrically connects the pressure plate 9 with the shielding cap 27 and presses the shielding cap 27 against a high-voltage contact 24 of the high-voltage feedthrough 44. This produces a continuous electrical connection from the outside of the housing 40 to the diverting element 20.
  • a cylindrical wall of the umbrella hood 27 extending in the direction of the cylinder axis 26 guides the retaining element 5 in the radial direction, ie perpendicular to the cylinder axis 26.
  • FIG. 3 shows an alternative embodiment.
  • a shield cap 27 is arranged around the end fitting 4, which rests, however, not directly on the holding element 5 via a spring element.
  • the connection to the high voltage contact 24 is made here via a removable separator 32.
  • the separating device 32 has a cylindrical housing body 34 and two mutually movable contacts 33, 35.
  • the contact 33 is fixedly connected to the housing body 34, a movable contact 35 is hineinind Wegbar in the housing body 35 against a spring 36.
  • the length of the separator 32 can be shortened by the impressions of the movable contact 35.
  • the fixed contact 33 has a protruding from the housing body 34 pin 37 which is inserted or screwed into a bore 16 in a projection 12 of the contact plate which extends through the annular opening 19 of the holding element.
  • the movable contact 35 is pressed by the spring 36 to the high voltage contact 24.
  • a recess in the high voltage contact 24 centers the movable contact 35.
  • the separator 32 can be easily removed, for example, through a manhole in the housing 40 and replaced. This is in tests of the switchgear, in which the surge arrester 1 is installed, an advantage, since the active part 2 can be easily separated from the switchgear.
  • FIG. 4 shows the structure of the end fitting 3 on the ground terminal side 31.
  • Retaining element 5 and the contact assembly. 8 from pressure plate 9, contact plate 10 and spring element 11 are here as in the FIG. 3 constructed, but without the end cap 3 surrounding the shield cap 27, which is not necessary on the ground terminal side 31 because of the low field strengths.
  • the approach 12 of the printing plate 9 has here as well as in the FIG. 2 a bore 16 which is coaxial with the cylinder axis 26.
  • This bore 26 has an internal thread, which is screwed onto a corresponding external thread of a feedthrough bolt 23.
  • the bushing pin 23 is the electrically conductive part of the ground-side housing bushing 21, which also has two electrically insulating feedthrough bushings 22, one of which is disposed inside, the other outside of the housing 40. Through a central opening through both bushings 22 of the bushing pin 23 is inserted, which produces an electrically conductive connection, which is electrically insulated from the housing 40 from inside to outside of the housing 40.
  • the two bushings 22 have tubular approaches with different diameters, which lead through a passage opening in the lid 23 and are inserted into each other.
  • the bushing bolt 23 has on its lying outside of the housing 40 side a stop which is supported on the outer bushing 22.
  • An anti-rotation 25 prevents co-rotation of the feedthrough bolt 23 when the active part 2 is screwed onto the inside of the housing 40 on the feedthrough bolt 23.
  • the projection 12 of the pressure plate 9 is supported on the inner bushing sleeve 22.
  • the bushings 22 are inserted from both sides into the passage opening of the lid 43. From the outside of the bushing bolt 23 is inserted and fixed with the anti-rotation 25.
  • the preassembled active part 2 is now screwed with the bore 16 on the bushing bolt 23.
  • he has key surfaces 17 for a tool, such as an open-end wrench on. Apart from the key surfaces 17, all components of the end fitting 3 rotationally symmetrical.
  • the active part 2 is now connected via the housing feedthrough 21 fixed to the lid 43.
  • the lid 23 can now be placed on the housing 40.
  • the active part 2 is centered on the terminal stud 28 or the movable contact 35 on the high voltage contact 24.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
EP20130183563 2013-09-09 2013-09-09 Paratonnerre isolé du gaz Withdrawn EP2846333A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20130183563 EP2846333A1 (fr) 2013-09-09 2013-09-09 Paratonnerre isolé du gaz
PCT/EP2014/068167 WO2015032671A1 (fr) 2013-09-09 2014-08-27 Dispositif de protection contre les surtensions à isolation gazeuse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20130183563 EP2846333A1 (fr) 2013-09-09 2013-09-09 Paratonnerre isolé du gaz

Publications (1)

Publication Number Publication Date
EP2846333A1 true EP2846333A1 (fr) 2015-03-11

Family

ID=49123748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20130183563 Withdrawn EP2846333A1 (fr) 2013-09-09 2013-09-09 Paratonnerre isolé du gaz

Country Status (2)

Country Link
EP (1) EP2846333A1 (fr)
WO (1) WO2015032671A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3082136A1 (fr) 2015-04-14 2016-10-19 Siemens Aktiengesellschaft Paratonnerre à isolation gazeuse
WO2020181291A1 (fr) * 2019-03-07 2020-09-10 Arris Enterprises Llc Dispositif d'arrêt de transport de données
DE102020212640A1 (de) 2020-10-07 2022-04-07 Siemens Energy Global GmbH & Co. KG Leiteranordnung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905118A (en) * 1988-03-31 1990-02-27 Hubbell Incorporated Base mounted electrical assembly
GB2258352A (en) * 1991-08-02 1993-02-03 Ngk Insulators Ltd Overvoltage arrester
WO2000055869A1 (fr) * 1999-03-17 2000-09-21 Siemens Aktiengesellschaft Coupe-circuit de surtension dote d'un element de traction
DE102008048840A1 (de) 2007-10-12 2009-04-16 Tridelta Überspannungsableiter Gmbh Überspannungsableiter mit Käfig-Design
WO2011000684A1 (fr) 2009-06-30 2011-01-06 Siemens Aktiengesellschaft Garniture d’extrémité d’un composant électrique et procédé de compression d’une garniture d’extrémité
WO2012168112A1 (fr) 2011-06-10 2012-12-13 Siemens Aktiengesellschaft Coupe-circuit de surtension

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905118A (en) * 1988-03-31 1990-02-27 Hubbell Incorporated Base mounted electrical assembly
GB2258352A (en) * 1991-08-02 1993-02-03 Ngk Insulators Ltd Overvoltage arrester
WO2000055869A1 (fr) * 1999-03-17 2000-09-21 Siemens Aktiengesellschaft Coupe-circuit de surtension dote d'un element de traction
DE102008048840A1 (de) 2007-10-12 2009-04-16 Tridelta Überspannungsableiter Gmbh Überspannungsableiter mit Käfig-Design
WO2011000684A1 (fr) 2009-06-30 2011-01-06 Siemens Aktiengesellschaft Garniture d’extrémité d’un composant électrique et procédé de compression d’une garniture d’extrémité
WO2012168112A1 (fr) 2011-06-10 2012-12-13 Siemens Aktiengesellschaft Coupe-circuit de surtension

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3082136A1 (fr) 2015-04-14 2016-10-19 Siemens Aktiengesellschaft Paratonnerre à isolation gazeuse
WO2020181291A1 (fr) * 2019-03-07 2020-09-10 Arris Enterprises Llc Dispositif d'arrêt de transport de données
US11588552B2 (en) 2019-03-07 2023-02-21 Arris Enterprises Llc Data-carrying arrester
DE102020212640A1 (de) 2020-10-07 2022-04-07 Siemens Energy Global GmbH & Co. KG Leiteranordnung

Also Published As

Publication number Publication date
WO2015032671A1 (fr) 2015-03-12

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