EP2764521A1 - Dispositif de protection contre les surtensions - Google Patents

Dispositif de protection contre les surtensions

Info

Publication number
EP2764521A1
EP2764521A1 EP12791714.4A EP12791714A EP2764521A1 EP 2764521 A1 EP2764521 A1 EP 2764521A1 EP 12791714 A EP12791714 A EP 12791714A EP 2764521 A1 EP2764521 A1 EP 2764521A1
Authority
EP
European Patent Office
Prior art keywords
housing
cone
ring
clamping ring
support
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Withdrawn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
EP12791714.4A
Other languages
German (de)
English (en)
Inventor
Dirk Springborn
Ingo Gottschalk
Erhard Pippert
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 Energy Global GmbH and Co KG
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
Publication of EP2764521A1 publication Critical patent/EP2764521A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H02H1/043—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks to inrush currents

Definitions

  • the invention relates to a surge arrester having a tubular housing according to the preamble of patent claim 1.
  • Overvoltage arresters are protective systems for example for high-voltage systems, such as transmission lines or 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 high-voltage system.
  • Such a surge arrester comprises one or more cylindrical varistor blocks, each of which is constructed from a column 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 varistor block is delimited at both ends by valves that make electrical contact with the high voltage system and ground. To ensure good electrical contact even under mechanical load, the varistor block 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 fittings under train. The tension elements surround the varistor column and thus form a cage around them.
  • the varistor block thus comprises the varistor column, the fittings and the tension elements.
  • these surge arresters When used in high voltage systems with voltages of several hundred kilovolts, these surge arresters can have dimensions of more than one meter.
  • a tubular housing for example made of a composite material such as glass fiber reinforced plastic. Since the varistor column has a smaller diameter than the inner diameter of the housing because of the required insulation distances, the varistor block in this case contains intermediate plates which are inserted in the varistor column and support it against the inside of the housing. The varistor block is thus fixed in directions transverse to the tube axis of the housing. To increase the bending strength of the housing, it is known to reinforce the housing in the region of the end fitting.
  • a surge arrester is shown in DE 20 2005 008 111 Ul, which has a support element on the inside of the housing in the region of the end fitting.
  • the housing is enclosed between the end fitting and the support element and held by gluing.
  • Object of the present invention is to provide a surge arrester with a high bending strength in the region of the housing end, which allows non-destructive replacement of the Varistorblocks, especially with intermediate plates.
  • the invention is based on a Questionnapssabieiter with a tubular housing, one with one end of the
  • Supporting ring with a cone and a clamping ring with a counter cone associated with the cone In this case, the cone is clamped to the counter-cone in such a way that the support ring is pressed against displacement against the housing.
  • the support ring bears against an inner side of the housing.
  • the support ring on a second cone with the first cone opposite slope has a second clamping ring with a second counter-cone, which is assigned to the second cone. This causes a particularly advantageous distribution of the pressing forces of the support ring on the housing
  • support ring and first clamping ring and optionally second clamping ring are arranged coaxially to a tube axis of the housing and for producing or releasing the tension against each other along the tube axis slidably.
  • This allows easy positioning of the support element in the housing and also easy clamping and loosening of the support element.
  • the support ring and the first clamping ring or the first and second clamping ring are connected to each other via adjusting means and that the required for producing or releasing the tension shift by the adjusting means is adjustable.
  • the adjusting means allow on the one hand a particularly simple clamping and releasing of the support element and on the other hand a secure fixation of the support element in the clamped position.
  • FIG. 1 shows a head end of an inventive overvoltage arrester with support element in a half-sectional view
  • FIG. 2 shows the individual parts of the support element from FIG. 1 in a half-sectional representation
  • FIG. 3 shows an alternative embodiment of a support element in a half-sectional view
  • FIG. 4 shows a further alternative embodiment of a
  • FIG. 1 shows the head region of a surge arrester 1.
  • a tubular housing 2 is fixedly connected to an end fitting 3.
  • the connection can be made for example by means of a press bond.
  • the housing 2 consists of an electrically non-conductive mechanically stable material, usually a composite material, such as a glass fiber reinforced plastic.
  • a sheath with umbrellas 14, for example made of silicone On the outside of the housing 2 is applied to increase the creepage distance and to improve the weather resistance, a sheath with umbrellas 14, for example made of silicone.
  • the end fitting 3 is usually made of an electrically conductive material, for example made of aluminum or steel. Such an end fitting 3 is usually located at both ends of the housing 2, but here only the end fitting 3 is shown at the head of the housing 2.
  • the end fitting 3 is electrically connected to the respective end of a varistor block, not shown here.
  • the housing 2 is set up with the end fittings 3 attached to the housing ends and the varistor block from above into the housing 2 introduced.
  • a support member 4 is inserted into the housing 2 and fixed in the housing 2 in the region of the upper end fitting 3.
  • the support element 4 projects beyond the region of the end fitting 3 into the housing 2.
  • the support element 4 comprises a support ring 5, a first tension ring 7 and a second tension ring 10.
  • the first tension ring 7 has bores, and the second tension ring 10 bores with internal thread.
  • Adjusting means 13, which are shown here as screws, are introduced through the bores of the first clamping ring 7 and into the internal threads of the second clamping ring 10.
  • the support ring 5 has a cylindrical straight outer surface 15 and on the inner circumferential surface a first cone 6 and a second cone 9.
  • the outer circumferential surface 15 of the support ring 5 abuts against the inside of the housing 2.
  • the second cone 9 has an opposite to the first cone 6 inclination against the tube axis 12, but the same cone angle.
  • the first clamping ring 10 has a straight inner circumferential surface and a first counter-cone 8 on its outer circumferential surface.
  • the cone angle of the first counter-cone 8 corresponds to the cone angle of the first cone 6, however, with opposite inclination.
  • the diameter of the first clamping ring 7 is dimensioned so that the first clamping ring 7 can be at least partially coaxially inserted into the support ring 5.
  • the second clamping ring 10 corresponds in its outer shape and its dimensions to the first clamping ring 7, but is arranged rotated through 180 ° about an axis transverse to the tube axis 12.
  • the first clamping ring 7 is arranged in the support ring 5, that the first counter-cone 8 at least partially rests on the first cone 6.
  • First cone 6 and first counter cone 8 are associated with each other.
  • the second clamping ring 10 is arranged in the support ring 5, that the second counter-cone 11 at least partially rests on the second cone 9.
  • Second cone 9 and second counter cone 11 are thus associated with each other.
  • First and second clamping ring 7, 10 are connected to adjusting means 13.
  • the adjusting means 13 engage through the holes in the first clamping ring 7 in the internal thread of the second clamping ring 10.
  • First and second clamping ring 7, 10 have in the axial direction of the tube axis 12 at a distance. If the adjusting means 13 are tightened, this distance is reduced.
  • the first and second counter-cone 8, 11 slide along the respective associated cone 6, 9 and press the support ring 5 outwardly against the housing 2.
  • FIG. 2 shows the individual parts of the support element 4 from FIG. 1 in the disassembled state.
  • the first clamping ring 7 and the second clamping ring 10 are inserted from opposite sides into the support ring 5.
  • the adjusting means 13 first and second clamping ring 7, 10 loosely connected.
  • the thus pre-assembled support member 4 is then inserted from one end into the housing 2 and positioned in the region of the end fitting 3. If the supporting element 4 is in the correct position, the adjusting means 13 are tightened and thus the
  • FIGS. 3 and 4 show further embodiments of a support element 4 in a housing 2. Further components of the surge arrester 1 are not shown here for the sake of clarity.
  • FIG. 3 shows a support element 4 with a support ring 5 and a first clamping ring 7.
  • the support ring 5 has a first cone 6, the first clamping ring 7 a first counter-ring cone 8.
  • the first clamping ring 7 is arranged in the support ring 5, that the first cone 6 and the first counter-cone 8 abut each other.
  • Support ring 5 and first clamping ring 7 can be clamped together by means of a clamping tool, not shown here, by the first clamping ring 7 in the
  • Support ring 5 is pressed. With a suitable surface treatment of the first cone 6 and the first counter-cone 8, this tension is self-fixing. A release of the tension then takes place with a corresponding release tool.
  • annular collar 16 is integrally formed on the support ring 5 at the wider end of the first cone 6, in which bores with threads are made in the direction parallel to the tube axis 12.
  • the first clamping ring 7 also has through-holes parallel to the tube axis 12, through which adjusting means 13 engage in the thread in the collar 16 of the first clamping ring 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Thermistors And Varistors (AREA)

Abstract

L'invention concerne un dispositif de protection contre les surtensions (1) comprenant un boîtier tubulaire (2), une garniture terminale (3) qui est reliée à une extrémité du boîtier (2), un bloc varistor qui est disposé dans le boîtier (2) et un élément de maintien (4) qui est disposé dans la zone de la garniture terminale (3). L'élément de maintien (4) comprend un anneau de maintien (5) disposé contre le boîtier (2), qui présente un cône (6) et un anneau de serrage (7) avec un cône antagoniste (8) qui correspond audit cône (6). Le cône (6) est serré avec le cône antagoniste (8) de manière que l'anneau de maintien (5) soit poussé contre le boîtier (2) de manière à rester immobile. L'élément de maintien (4) peut être utilisé également après le montage du bloc varistor et est immovible.
EP12791714.4A 2011-12-09 2012-11-09 Dispositif de protection contre les surtensions Withdrawn EP2764521A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011088072A DE102011088072A1 (de) 2011-12-09 2011-12-09 Überspannungsableiter
PCT/EP2012/072214 WO2013083347A1 (fr) 2011-12-09 2012-11-09 Dispositif de protection contre les surtensions

Publications (1)

Publication Number Publication Date
EP2764521A1 true EP2764521A1 (fr) 2014-08-13

Family

ID=47257759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12791714.4A Withdrawn EP2764521A1 (fr) 2011-12-09 2012-11-09 Dispositif de protection contre les surtensions

Country Status (12)

Country Link
US (1) US9306385B2 (fr)
EP (1) EP2764521A1 (fr)
KR (1) KR101655639B1 (fr)
CN (1) CN103975394B (fr)
AU (1) AU2012348791B2 (fr)
BR (1) BR112014013418B1 (fr)
CA (1) CA2858439C (fr)
DE (1) DE102011088072A1 (fr)
IN (1) IN2014KN01098A (fr)
MX (1) MX2014006892A (fr)
RU (1) RU2583046C1 (fr)
WO (1) WO2013083347A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2998970B1 (fr) * 2014-09-22 2017-08-02 Siemens Aktiengesellschaft Limiteur du surtension
DE102018203893A1 (de) 2018-03-14 2019-09-19 Siemens Aktiengesellschaft Überspannungsableiter und Verfahren zur Montage eines Überspannungsableiters
CN117148075B (zh) * 2023-10-30 2024-04-05 国网天津市电力公司高压分公司 一种避雷器冲击特性试验装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2883574A (en) * 1958-04-07 1959-04-21 Ralph R Pittman Lightning arrester
US3111606A (en) * 1960-07-08 1963-11-19 Mc Graw Edison Co Lightning arrester isolator devices
US3534989A (en) * 1968-05-29 1970-10-20 Joslyn Mfg & Supply Co End fitting
US4930039A (en) 1989-04-18 1990-05-29 Cooper Industries, Inc. Fail-safe surge arrester
US5363266A (en) * 1992-06-18 1994-11-08 Raychem Corporation Electrical surge arrester
US5712757A (en) * 1996-06-27 1998-01-27 Raychem Corporation Surge arrester having ridged terminals
DE19926950A1 (de) 1999-06-14 2000-12-21 Abb Research Ltd Kabelendgarnitur
DE19940939C1 (de) * 1999-08-23 2001-07-19 Siemens Ag Überspannungsableiter mit einem Verspannelement
DE202005008111U1 (de) 2005-05-24 2005-08-04 Tridelta Überspannungsableiter Gmbh Überspannungsableiter mit Rohr-Design
DE102005024206B4 (de) 2005-05-25 2007-03-15 Tridelta Überspannungsableiter Gmbh Überspannungsableiter mit Käfig-Design
DE102009007067A1 (de) * 2009-01-29 2010-08-05 Siemens Aktiengesellschaft Impedanzanordnung mit einem ersten Armaturkörper

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2013083347A1 *

Also Published As

Publication number Publication date
MX2014006892A (es) 2014-09-04
RU2583046C1 (ru) 2016-05-10
US9306385B2 (en) 2016-04-05
BR112014013418A2 (pt) 2017-06-13
CN103975394A (zh) 2014-08-06
AU2012348791B2 (en) 2015-06-25
BR112014013418B1 (pt) 2020-12-29
CN103975394B (zh) 2016-11-09
KR101655639B1 (ko) 2016-09-07
DE102011088072A1 (de) 2013-06-13
IN2014KN01098A (fr) 2015-10-09
WO2013083347A1 (fr) 2013-06-13
CA2858439C (fr) 2017-01-17
US20140368962A1 (en) 2014-12-18
AU2012348791A1 (en) 2014-07-03
CA2858439A1 (fr) 2013-06-13
KR20140099891A (ko) 2014-08-13

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