EP2887470A1 - Überspannungsschutz elektrische Vorrichtung - Google Patents

Überspannungsschutz elektrische Vorrichtung Download PDF

Info

Publication number
EP2887470A1
EP2887470A1 EP14460097.0A EP14460097A EP2887470A1 EP 2887470 A1 EP2887470 A1 EP 2887470A1 EP 14460097 A EP14460097 A EP 14460097A EP 2887470 A1 EP2887470 A1 EP 2887470A1
Authority
EP
European Patent Office
Prior art keywords
bracket
pin
housing
disconnector
opening
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Withdrawn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
EP14460097.0A
Other languages
English (en)
French (fr)
Inventor
Justyna Wydrzynska
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.)
ABB Sp zoo
Original Assignee
ABB Sp zoo
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 ABB Sp zoo filed Critical ABB Sp zoo
Publication of EP2887470A1 publication Critical patent/EP2887470A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01T1/00—Details of spark gaps
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
    • 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
    • H01T1/00—Details of spark gaps
    • H01T1/12—Means structurally associated with spark gap for recording operation thereof

Definitions

  • the present invention relates to an overvoltage protection electrical device designed to protect wind turbines against damages caused by overvoltage conditions and to facilitate the identification of damages to individual turbines.
  • the Polish patent description no. PL182651 discloses a surge arrester with a terminal for low-voltage insulated electrical conductors and teeth installed on the terminal that are used to puncture the electrical insulation and penetrate the electrical conductor, and with an earthing conductor terminal mounted on the surge arrester.
  • the surge arrester is mechanically and electrically connected to the terminal using a detachable threaded mandrel screwed into a threaded bore positioned in the terminal so that the surge arrester may be disconnected and connected without disconnecting the electrical conductor terminal.
  • a disadvantage of the described solution lies in the fact that the device does not ensure durable disconnection at the time of its damage and provides no signal indicating the arrester affected by the failure.
  • EP1116246 discloses an overvoltage protection device comprising a housing containing an electrode member with a planar contact surface and a wafer of varistor material.
  • the varistor wafer is positioned between the first planar electrical contact surface of the housing and the second planar movable electrode surface installed inside the overvoltage protection device housing and used as an isolator switch.
  • the overvoltage protection device housing consists of metal walls and is provided with an axial hole used to position the electrode therein.
  • a disadvantage of the described solution lies in the fact that the device does not ensure durable disconnection when the varistor positioned inside the metal housing is damaged and there is no visual marking of the damage. The lack of a movable marking on the device prevents the installation of a switch used to signal a damage to the varistor and consequently to the overvoltage protection device as a whole.
  • the essence of the device according to the present invention comprising a surge arrester with a slidable disconnector positioned axially and symmetrically inside a cylindrical arrester housing, is that a detachable bracket is mounted on the external face wall of a housing of the arrester, and a contact switch is attached to the bracket.
  • the contact switch comprises a movable push-button and is attached to the bracket so that the position of the push-button is concentric relative to an opening hole that is cut in the bracket and is positioned relative to the axis of the slidable pin of the disconnector so that the axis of the opening of the bracket, the axis of an opening of a lower electrode and the longitudinal axis of the pin are overlapped together.
  • the cylindrical housing of the surge arrester is an insulating housing and is shaped as a cylinder whose side walls consist of an insulating reinforcing tube made from glass fibre with a silicone protective coating applied on its external surface.
  • the external face walls of the housing are made from metal.
  • one end of the pin of the disconnector is connected to a conical spring positioned around the pin inside the cylindrical housing of the surge arrester.
  • the contact switch has a shape of the MCB-10 contact block manufactured by ABB Company.
  • the bracket has a shape of a pan with a flat bottom surface and side walls bent outwards.
  • the depth of the bracket pan is less than the maximum distance of a stroke of the slidable pin of the disconnector.
  • the tension force of the conical spring is set so that the stretching spring allows the pin to travel a sufficient distance for the free end of the pin to press the push-button to the inside of the contact switch.
  • the device according to the present invention provides a number of advantages, such as:
  • fig. 1 shows a cross-section of the device prior to actuation of the arrester
  • fig. 2 shows a cross-section of the device following actuation of arrester.
  • the device comprises a surge arrester 1 with a metal upper electrode 2 and a metal lower electrode 3, and a cylindrical insulating housing 4, implemented as a cylinder with an axial opening 3a, positioned on the side where the lower electrode 3 is mounted.
  • a varistor plate 5 is mounted inside the housing 4, between the electrodes 2 and 3, whose one surface contacts the surface of a disconnector 6 positioned axially inside the housing 4.
  • the disconnector is equipped with a slidable pin 7 whose one end is durably attached to a conical tension spring 8 and the other end constitutes a free contact member.
  • a bracket 9 with an opening 9a is attached to the housing 4 on the side where the lower electrode 3 is mounted, and the opening 9a is positioned along the axis of an opening 4a of the housing 4.
  • the bracket is implemented as a pan with a flat bottom surface and side walls bent outwards.
  • the bottom of the pan is provided with two openings, not depicted in the figure, used to fix the bracket to the surface of the housing 4.
  • a contact switch 10 with a push-button 11 is attached to the bent walls of the bracket and positioned so that the push-button 11 is situated along the axes of the openings 4a, 9b and of the pin 7.
  • the contact switch is a prefabricated component, preferably manufactured by ABB, available on the market as the "MCB -10 contact block".
  • the side walls of the insulating housing 4 are formed as a two-layer structure with the internal layer consisting of an insulating reinforcing tube 12 made from glass fibre on which a silicone protective layer 13 is applied.
  • the front panels of the cylindrical housing 4 are made from metal.
  • the internal walls of the reinforcing tube have locating pins 14 attached to them and used to correctly position the insulating reinforcing tube 12 made from glass fibre and thus to ensure that the disconnector switch 6 and the varistor plate 5 are correctly enclosed in the arrester 1.
  • the status of the device completed according to the present invention is such that the pin 7 of the disconnector 6 is contained in whole inside a box of the housing 4.
  • the protection device is activated so that the pin 7 of the disconnector 6, driven by a thermal pulse from the varistor plate 5, and affected by the tension force of the spring 8, is shifted to a position in which its free end protrudes outside the housing of the arrester 1 and strikes the push-button 11 of the switch 10.
  • the dimensions of the bracket 9, in particular its height, must be selected so that the free end of the pin 7 strikes the push-button 11 with sufficient force to activate the switch with the bracket positioned outside the box of the housing 4.
  • the contacts of the switch are connected and a signal of current passage through the MCB-10 contact block is sent to the control centre that monitors e.g. a wind farm with a number of wind generators installed. Actuation of the switch is signalled at the time of a damaging overvoltage event in one of the arrester which enables the control centre to immediately identify the damaged wind turbine and significantly accelerates the repair process as well as improves the process of continuous monitoring of wind farm operation.

Landscapes

  • Fuses (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP14460097.0A 2013-12-20 2014-12-08 Überspannungsschutz elektrische Vorrichtung Withdrawn EP2887470A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL406612A PL406612A1 (pl) 2013-12-20 2013-12-20 Urządzenie elektryczne do ochrony przepięciowej

Publications (1)

Publication Number Publication Date
EP2887470A1 true EP2887470A1 (de) 2015-06-24

Family

ID=52292739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14460097.0A Withdrawn EP2887470A1 (de) 2013-12-20 2014-12-08 Überspannungsschutz elektrische Vorrichtung

Country Status (2)

Country Link
EP (1) EP2887470A1 (de)
PL (1) PL406612A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889222A (en) * 1973-11-07 1975-06-10 Tokyo Shibaura Electric Co Surge voltage absorber
EP1116246A1 (de) 1998-09-21 2001-07-18 TYCO Electronics Corporation Überspannungsschutz mit einer scheibe aus varistormaterial
PL182651B1 (pl) 1996-10-03 2002-02-28 Sekko Ab Oy Ochronnik przepięciowy z przyłączem dla niskonapięciowych izolowanych przewodów
WO2011039342A1 (de) * 2009-10-02 2011-04-07 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement
EP2355274A1 (de) * 2010-02-09 2011-08-10 Phoenix Contact GmbH & Co. KG Überspannungsschutzelement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889222A (en) * 1973-11-07 1975-06-10 Tokyo Shibaura Electric Co Surge voltage absorber
PL182651B1 (pl) 1996-10-03 2002-02-28 Sekko Ab Oy Ochronnik przepięciowy z przyłączem dla niskonapięciowych izolowanych przewodów
EP1116246A1 (de) 1998-09-21 2001-07-18 TYCO Electronics Corporation Überspannungsschutz mit einer scheibe aus varistormaterial
WO2011039342A1 (de) * 2009-10-02 2011-04-07 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement
EP2355274A1 (de) * 2010-02-09 2011-08-10 Phoenix Contact GmbH & Co. KG Überspannungsschutzelement

Also Published As

Publication number Publication date
PL406612A1 (pl) 2015-06-22

Similar Documents

Publication Publication Date Title
KR0160970B1 (ko) 송전선용 피뢰장치
EP2903008A1 (de) Nicht freilaufende lichtbogenblitzschutz- und lückenschutzvorrichtung
EP3097617B1 (de) Blitzableiter
CN106602536B (zh) 一种电涌保护模块
CN201812614U (zh) 防爆避雷器
CN201576522U (zh) 复合针式氧化锌避雷器
CN203871688U (zh) 消弧消谐柜
EP1473809A2 (de) Blitzstromschutzvorrichtung mit Kriechstromentladung
CN108878084A (zh) 防爆避雷器
EP2887470A1 (de) Überspannungsschutz elektrische Vorrichtung
CN109509601B (zh) 一种耐张避雷器总成
CN209199703U (zh) 一种金属氧化物避雷器
CN109448939A (zh) 一种耐张杆外串联间隙金属氧化物避雷器
CN105914726B (zh) 安装在印刷电路板上的过电压保护器装置
CN204517391U (zh) 一种故障指示保护器
CN208637232U (zh) 电缆护层保护器
CN203574220U (zh) 带计数功能的穿刺型避雷器
CN109509596A (zh) 一种金属氧化物避雷器
CN207265623U (zh) 一种带电可卸式避雷器
CN214479608U (zh) 一种etc直击雷防护装置
CN205544255U (zh) 一种电涌抑制装置
CN205428614U (zh) 一种定向脱离型插头避雷器
CN218102563U (zh) 带断开装置的过电压保护器
CN215007761U (zh) 一种含熔断器的瓷外套避雷器
CN203660484U (zh) 后接式避雷器

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20141208

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

R17P Request for examination filed (corrected)

Effective date: 20150812

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170701