EP2005446A1 - Parafoudre basse tension comprenant un indicateur visuel d'anomalie - Google Patents

Parafoudre basse tension comprenant un indicateur visuel d'anomalie

Info

Publication number
EP2005446A1
EP2005446A1 EP07715994A EP07715994A EP2005446A1 EP 2005446 A1 EP2005446 A1 EP 2005446A1 EP 07715994 A EP07715994 A EP 07715994A EP 07715994 A EP07715994 A EP 07715994A EP 2005446 A1 EP2005446 A1 EP 2005446A1
Authority
EP
European Patent Office
Prior art keywords
surge arrester
fault indicator
arrester according
wax
indicator
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
Application number
EP07715994A
Other languages
German (de)
English (en)
Other versions
EP2005446B1 (fr
Inventor
Przemyslaw Burzynski
Jan Czyzewski
Przemyslaw Balcerek
Wojciech Piasecki
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 Research Ltd Sweden
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
Priority to PL07715994T priority Critical patent/PL2005446T3/pl
Publication of EP2005446A1 publication Critical patent/EP2005446A1/fr
Application granted granted Critical
Publication of EP2005446B1 publication Critical patent/EP2005446B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • H01C7/102—Varistor boundary, e.g. surface layers
    • 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
    • H01C7/105—Varistor cores
    • H01C7/108—Metal oxide

Definitions

  • the subject of the invention is a surge arrester, and especially a low- voltage surge arrester.
  • the surge arrester is applicable in protecting AC and DC low-voltage networks against multiple lightning surges and switching overvoltage.
  • the low-voltage surge arrester LOVOS made by ABB consists of an insulating casing housing an oxide-type varistor whose flat face surfaces touch metal terminals.
  • One of the terminals, called earthing terminal is used for earthing the surge arrester, and the second terminal is used for connecting network leads.
  • the varistor and the tips of the terminals that touch it are enveloped in a polymer material which forms the insulating casing.
  • An indicator of the disconnector actuation can be also located there.
  • Such indicator is made of a spring which is fixed in a tensioned state inside the cavity, and a disk connected with it. When the disconnector is actuated, the disk with the data plate is pushed outside the arrester by the force of the released spring.
  • a device signalling failure in a surge arrester used for protecting medium and high voltage networks against overvoltage is known from European patent description No. EP 0521805.
  • That signalling device consists of two electrodes which are the surge arrester terminals which are connected in series with a varistor and in parallel with a resistor.
  • the varistor, the tips of the electrodes and the resistor are housed in an insulating casing.
  • the clamping ring without the securing element slides off the casing and its visible absence indicates damage to the surge arrester.
  • the described indicators contain elastic construction elements which are used to visually determine the condition of the surge arrester. A suitable location of these elements permits a quick assessment of the device condition.
  • a surge arrester fitted with an indicator for indicating fault current is known from European patent description No. EP 0915544.
  • This indicator is a separated part of the external insulating casing, which heats up during the flow of fault current and can be easily identified by observation from outside.
  • This part defined as an information carrier, contains thermal paint which is applied on the outside surface of at least one part of the insulating casing. The thermal paint changes its colour above a certain threshold temperature. For example, Co(NH 3 ) 6 changes its colour from yellow to blue at a temperature of 200 0 C. A change of the indicator colour allows a quick indication of the damaged surge arrester by a person inspecting it from outside.
  • the essential quality of the inventive surge arrester comprising at least one oxide varistor element placed in an insulating housing, connecting terminals of which one is an earthing terminal and the other is used for connecting network leads, and fitted with a visual fault indicator, consists in that the fault indicator is an element made of a material that changes its state of aggregation above a temperature defined as a safe operating temperature of the surge arrester and the visible effect of such change of the state of aggregation is the indication of damage to the surge arrester.
  • the fault indicator is made of thermoplastic polymer.
  • the fault indicator is made of wax.
  • the fault indicator is made of polypropylene wax.
  • the fault indicator is made of polyethylene wax.
  • the fault indicator is made of a wax mixture of a melting point of 100-160 0 C.
  • the fault indicator is made of micronized wax.
  • the fault indicator is made of coloured wax.
  • the fault indicator is placed in a hole located in the insulating casing.
  • the hole housing the indicator is located around one of the connecting terminals.
  • the fault indicator is located on the surface of the insulating casing.
  • the fault indicator consists of two interconnected layers - the inner one connected with the insulating casing or the plate of the earthing terminal and the outer one.
  • both layers differ in chemical composition.
  • the outer layer contains a dye.
  • the indicator has the shape of a disk.
  • the advantage of the temperature indicator is easy identification of a defective surge arrester. Compared to mechanical designs, the construction of the indicator is very simple. Also the installation of the indicator into any type of surge arrester is simple, especially by means of micronized wax. By appropriately changing the chemical composition of the material it is easy to adapt the indicator to a broad range of temperatures (100-160 0 C), thus applying it to surge arresters of different voltage and current operating ranges.
  • fig. 1 shows a side section of an embodiment of the surge arrester with the fault indicator in the form of a single-layer disk
  • fig. 2 an embodiment of the surge arrester with the fault indicator in the form of a two-layer disk, in a side section
  • fig. 3 an embodiment of the surge arrester with the fault indicator located on the surface of the insulating casing, in a side section.
  • connection terminals 2 and 3 An oxide varistor element 1 together with the ends of connection terminals 2 and 3 is placed tightly in an insulating casing 4.
  • One of the connection terminals is the earthing terminal 2, and the other terminal 3 is used for connecting network leads.
  • the insulating casing 4 is made as a casting of a polymer material and it has the shape of a cylinder inside which there is a cylindrical hole 5 through which passes the axis of the earthing terminal 2 of the surge arrester. In the inside diameter of the hole 5 there is a temperature fault indicator 6.
  • the hole 5 can be made in another place of the insulating casing 4, which is not shown in the drawing, however, it should be located in direct proximity of the varistor element 1 and its outline can take any shape.
  • the fault indicator 6 sticks to the plate of the earthing terminal 2.
  • the indicator has the shape of a disk fitting to a cavity in the casing 4.
  • the fault indicator 6 can be also placed on the surface of the insulating casing 4, in a place in direct proximity to the varistor
  • the fault indicator 6 is an element made of a material that changes its state of aggregation above a temperature defined as a safe operating temperature of the surge arrester. For a low-voltage surge arrester, this temperature is 100 - 160° C, and the fault indicator is made of polypropylene or polyethylene wax or a mixture of both.
  • the wax material of which the indicator is made has the structure of micronized wax.
  • a dye is added to wax to facilitate observation of wax outflow after it has melted as a result of the actuation of the temperature indicator.
  • the indicator 6 consists of two layers of wax material, the inner layer 7 sticking to the plate of the earthing terminal 2 and the outer layer 8 being connected with the layer 7. Both layers differ in their chemical composition.
  • the inner layer 7 contains an admixture of a dye.
  • the operation of the fault indicator is such that it melts completely or partly under the influence of increased temperature of the surge arrester caused by a fault current.
  • the absence of the indicator 6 on the surface of the plate of the earthing terminal 2 indicates a fault in the surge arrester and it is can be easily noticed by an inspecting person. Similarly, a remnant of only a fragment of not melted-out indicator permits a correct inspection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Road Signs Or Road Markings (AREA)
  • Control Of Eletrric Generators (AREA)
EP07715994A 2006-04-12 2007-03-09 Parafoudre comprenant un indicateur visuel d'anomalie Not-in-force EP2005446B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07715994T PL2005446T3 (pl) 2006-04-12 2007-03-09 Ogranicznik przepięć z optycznym wskaźnikiem uszkodzenia

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL379449A PL206744B1 (pl) 2006-04-12 2006-04-12 Ogranicznik przepięć
PCT/PL2007/000011 WO2007117163A1 (fr) 2006-04-12 2007-03-09 Parafoudre basse tension comprenant un indicateur visuel d'anomalie

Publications (2)

Publication Number Publication Date
EP2005446A1 true EP2005446A1 (fr) 2008-12-24
EP2005446B1 EP2005446B1 (fr) 2009-06-10

Family

ID=38046847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07715994A Not-in-force EP2005446B1 (fr) 2006-04-12 2007-03-09 Parafoudre comprenant un indicateur visuel d'anomalie

Country Status (5)

Country Link
EP (1) EP2005446B1 (fr)
AT (1) ATE433598T1 (fr)
DE (1) DE602007001277D1 (fr)
PL (2) PL206744B1 (fr)
WO (1) WO2007117163A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8743525B2 (en) 2012-06-19 2014-06-03 Raycap Intellectual Property, Ltd Overvoltage protection devices including wafer of varistor material
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
CN105606254A (zh) * 2015-12-31 2016-05-25 天津鑫源达泰建筑工程有限公司 浪涌保护设备的检查装置
US10319545B2 (en) 2016-11-30 2019-06-11 Iskra Za{hacek over (s)}{hacek over (c)}ite d.o.o. Surge protective device modules and DIN rail device systems including same
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
US10340110B2 (en) 2017-05-12 2019-07-02 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
US10685767B2 (en) 2017-09-14 2020-06-16 Raycap IP Development Ltd Surge protective device modules and systems including same
US11223200B2 (en) 2018-07-26 2022-01-11 Ripd Ip Development Ltd Surge protective devices, circuits, modules and systems including same
US11862967B2 (en) 2021-09-13 2024-01-02 Raycap, S.A. Surge protective device assembly modules
US11723145B2 (en) 2021-09-20 2023-08-08 Raycap IP Development Ltd PCB-mountable surge protective device modules and SPD circuit systems and methods including same
US11990745B2 (en) 2022-01-12 2024-05-21 Raycap IP Development Ltd Methods and systems for remote monitoring of surge protective devices

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9110741D0 (en) * 1991-05-13 1991-07-10 Pearse David A Overheating monitor
DE19749522A1 (de) * 1997-11-08 1999-05-12 Asea Brown Boveri Elektrischer Apparat, insbesondere Überspannungsableiter, mit einer Vorrichtung zur Anzeige eines Fehlerstromstroms
EP1150307B1 (fr) * 2000-04-26 2008-10-22 Littelfuse Ireland Development Company Limited Varistance à base d'oxyde metallique protégée thermiquement
US6564742B2 (en) * 2001-08-03 2003-05-20 Hewlett-Packard Development Company, Llp Over-temperature warning device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007117163A1 *

Also Published As

Publication number Publication date
PL206744B1 (pl) 2010-09-30
PL379449A1 (pl) 2007-10-15
WO2007117163A1 (fr) 2007-10-18
PL2005446T3 (pl) 2009-09-30
DE602007001277D1 (de) 2009-07-23
ATE433598T1 (de) 2009-06-15
EP2005446B1 (fr) 2009-06-10

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