EP2859561A1 - Élément de contact pour varistor - Google Patents

Élément de contact pour varistor

Info

Publication number
EP2859561A1
EP2859561A1 EP13729598.6A EP13729598A EP2859561A1 EP 2859561 A1 EP2859561 A1 EP 2859561A1 EP 13729598 A EP13729598 A EP 13729598A EP 2859561 A1 EP2859561 A1 EP 2859561A1
Authority
EP
European Patent Office
Prior art keywords
varistor
var
contacting
connection points
electrical connection
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
EP13729598.6A
Other languages
German (de)
English (en)
Other versions
EP2859561B1 (fr
Inventor
Joachim Wosgien
Markus Philipp
Jan-Erik Schmutz
Rainer Durth
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.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
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 Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP2859561A1 publication Critical patent/EP2859561A1/fr
Application granted granted Critical
Publication of EP2859561B1 publication Critical patent/EP2859561B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/142—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals or tapping points being coated on the resistive element
    • 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
    • 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
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure

Definitions

  • the invention relates to a contact element for a
  • Varistors provide a voltage dependent resistor in electrical circuits. Varistors are therefore used in many applications,
  • the varistor generally has as its material a granular metal oxide, e.g. Zinc oxide and / or bismuth oxide and / or manganese oxide and / or chromium oxide and / or
  • a granular metal oxide e.g. Zinc oxide and / or bismuth oxide and / or manganese oxide and / or chromium oxide and / or
  • Silicon carbide which between two planar electrodes as supply elements ZL 1 , ZL 2 as a rule as
  • FIG. 1 An exemplary varistor VAR is shown in FIG. This has a first supply line ZL 1 on one side and a second
  • the individual grains have one
  • Grains barrier layers. It can be seen that with increasing thickness, the number of grain boundaries increases and thus the limit voltage. When a voltage is applied to the lead elements ZL 1 , ZL 2 , an electric field is formed. Depending on the voltage while the barrier layers now degraded and the resistance decreases.
  • Barrier layers are not a uniform process, but are formed locally Stroitipfade, for example, current paths S 1 , S 2 , from which come at different speeds in the conductive state.
  • current paths S 1 , S 2 from which come at different speeds in the conductive state.
  • the current path Si becomes conductive faster than the current path S 2 , since a lower voltage (for example 200 V) than current path S 2 (for example 300 V) must be overcome on the current path S 1 .
  • a temperature sensor is used, which when exceeding a certain
  • a rapid warming such as when applying a high voltage
  • Separation capability is usually limited here, i. only small currents can be switched off.
  • Such an energy input can be caused, for example, by the fact that an overvoltage occurs over a longer period of time a switching of the varistor leads VAR and now the short-circuit current of the network is derived via the varistor. In this case, significant heating of the varistor VAR occurs and there is a risk of fire. Furthermore, the varistor VAR can be damaged so far that the varistor breaks down explosively.
  • varistors VAR are therefore provided with an upstream fuse element F, which is dimensioned such that the maximum pulse current load I m of the varistor VAR can still be derived, but if the maximum pulse current load I m is exceeded, a switch-off is brought about.
  • a high pulse current carrying capacity of the fuse element is always associated with a high fuse rating. Therefore, it comes in the event of a fault only relatively late to an interruption of the (starting) short-circuit current.
  • the invention is based on the object, a
  • Fig. 3 shows a circuit arrangement of a varistor
  • Fig. 4a is an exemplary schematic view of a
  • 5 to 9 each show an exemplary lateral schematic sectional view of a contacting of a varistor according to an embodiment of the invention
  • Fig. 12b is an exemplary lateral schematic
  • Sectional view of a contacting of a varistor according to an embodiment of the invention and in Fig. 12a is an exemplary schematic plan view of a contact of a varistor according to an embodiment of the invention.
  • FIG. 13 shows an exemplary embodiment corresponding to the diagram from FIG. 5.
  • the invention will be explained in more detail with reference to the figures.
  • the invention proposes a novel Contacting for a varistor VAR before, like her
  • This contact has a first supply element ZLi, which to
  • Suitable connection to a supply network and a plurality of electrical connection points V 1 , V 2 , ... V N , which are spaced apart from each other and to multiple
  • FIGS. 4a and 4b An exemplary arrangement of junctions V 1 , V 2 , ... V N is shown in FIGS. 4a and 4b.
  • the plurality of electrical connection points V 1 , V 2 ,... V N and the first supply element ZLi are electrically connected to one another.
  • the plurality of electrical connection points Vi, V 2 ,... V N are each designed with a fuse element F 1 , F 2 ,... F N , such that a local breakdown of a part of the varistor VAR is achieved by a separation of the affected local electrical Junction (s) is accomplished.
  • An exemplary arrangement of fuse elements F 1 , F 2 ,... F N is again shown in FIG.
  • Leading elements ZL 1 , ZL 2 leads to a higher voltage drop, ie, the resistance increases, and therefore a current flow with a parallel component, such as over S 2 , will be rather low. It should be noted that the virtual
  • VAR-F varistor fuse series circuit
  • Insert fuse element F of about 125 A can now in the virtual parallel circuit according to Figure 3 at
  • FIG. 4 a shows an exemplary schematic view of a contacting of a varistor
  • FIG. 4 b shows an exemplary schematic perspective view of a contacting of a varistor according to an embodiment of the invention.
  • a planar feed element ZL 2 indicated by a dashed frame.
  • the actual varistor VAR and over it there is now a five conductor having lead element ZL. 1
  • Each of the conductors thus forms one of the aforementioned electrical connection points V 1 , V 2 , V 3 , V 4 , V 5 .
  • each of the conductors forms one of the aforementioned securing elements F 1 , F 2 ,... F 5 .
  • Fuse elements F are integrated in each of the current paths, which has a lower surge current carrying capacity
  • the melting integral is usually selected so that it is only slightly higher than the I 2 t value of the partial pulse, ie that the respective
  • Fuse element is able to carry a partial pulse without destruction.
  • the I 2 t value correlates with the nominal value of the fuse element. Since the I 2 t value is now lower, fuse elements with lower nominal values can be used.
  • the fuse elements are designed so that they each have an I 2 t, which by the maximum permissible pulse current load based on the zu
  • connection points provided with respective fuse elements so the performance drops only slightly. As an approximation, one can assume that the performance depends on the area of the active connection points.
  • Varistors may be provided, may also be provided alternatively or additionally a common thermal separation by means of a thermally activated switch TS.
  • FIG. 5 shows an exemplary lateral schematic sectional view of a contacting of a varistor VAR according to an embodiment of the invention. It is assumed that the arrangement is located in a housing G.
  • the housing G can be designed pressure-resistant to other systems before a non-excludable
  • the housing G may further be filled with an extinguishing agent LM.
  • a suitable extinguishing agent is, for example, POM or quartz sand.
  • the electrically insulating extinguishing medium LM surrounds the securing elements F 1 , F 2 ,... F N at least in sections.
  • These thin electrical connections can be designed, for example, as a fusible conductor and thus fulfill the function of the fuse elements F 1 , F 2 .
  • FIG. 5 A possible embodiment of the scheme of FIG. 5 is shown in FIG.
  • FIG. 6 shows SMD fuses or miniature fuses between the feed element ZL 1 and the respective connection points V 1 , V 2 .
  • Lead element ZL 1 are held by means of one or more springs D in electrical contact with the fuse elements. That is, the securing elements are non-positively and / or cohesively and / or positively between the
  • the matrix M may comprise, for example, fuse wires F 1 , F 2 , which were produced, for example, in a drawing process and were introduced in an insulation matrix. It is also possible to use a carrier material P, for example a circuit board, with plated-through holes as the matrix M, wherein the plated-through holes as
  • Fuse elements F, F 1 , F 2 , ... F N serve.
  • the individual feedthroughs F can each be assigned a connection point V, ie a first position for the one can be obtained on a two-layer board P
  • Lead element ZL 1 are used, while the second layer is used for the preparation of the joints.
  • the presented embodiments can be embodied as a contact element KE in order to be connected to a varistor VAR.
  • varistor VAR varistor VAR and a
  • connection points can be dimensioned differently and correspondingly have a different impedance.
  • FIG. 10 shows an example of a fir tree-like contact element KE. This one has one
  • FIG. 11 shows a similar arrangement.
  • the joints are made larger.
  • Such a contact element KE can, for example, by punching and
  • a resilient structure may be generated by bending.

Landscapes

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

Abstract

L'invention concerne un élément de mise en contact pour un varistor (VAR), comportant un premier élément de conduite d'alimentation (ZL1), lequel est adapté pour être relié à un réseau d'alimentation, et une pluralité de points de connexion électriques (V1, V2,... VN), lesquels sont espacés les uns des autres et adaptés pour établir la mise en contact multiple d'un pôle du varistor (VAR). La pluralité de points de connexion électriques (V1, V2,... VN) et le premier élément de conduite d'alimentation (ZL1) sont connectés électriquement ensemble, et la pluralité de points de connexion électriques (V1, V2,... VN) sont pourvus chacun d'éléments de coupe-circuit (F1, F2,.... FN), de sorte qu'un claquage local d'une partie du varistor (VAR) est mis en œuvre par une ouverture du point de connexion électrique local (V1, V2,... VN) concerné.
EP13729598.6A 2012-06-06 2013-05-27 Ensemble de varistance Active EP2859561B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012011241A DE102012011241A1 (de) 2012-06-06 2012-06-06 Kontaktelement für einen Varistor
PCT/EP2013/001556 WO2013182276A1 (fr) 2012-06-06 2013-05-27 Élément de contact pour varistor

Publications (2)

Publication Number Publication Date
EP2859561A1 true EP2859561A1 (fr) 2015-04-15
EP2859561B1 EP2859561B1 (fr) 2020-07-22

Family

ID=48651967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13729598.6A Active EP2859561B1 (fr) 2012-06-06 2013-05-27 Ensemble de varistance

Country Status (6)

Country Link
US (1) US9601243B2 (fr)
EP (1) EP2859561B1 (fr)
JP (1) JP2015524170A (fr)
CN (1) CN104380396B (fr)
DE (1) DE102012011241A1 (fr)
WO (1) WO2013182276A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012011241A1 (de) * 2012-06-06 2013-12-12 Phoenix Contact Gmbh & Co. Kg Kontaktelement für einen Varistor
DE102012022399A1 (de) 2012-11-16 2014-05-22 Phoenix Contact Gmbh & Co. Kg Zündkreis
DE102013223648B3 (de) 2013-11-20 2015-01-08 Phoenix Contact Gmbh & Co. Kg Multikontaktelement für einen Varistor
DE102014215280B3 (de) * 2014-08-04 2015-09-24 Phoenix Contact Gmbh & Co. Kg Kombiniertes Überspannungsschutzgerät mit einer integrierten Funkenstrecke

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5444379B2 (fr) * 1974-04-16 1979-12-25
US4125819A (en) * 1977-08-19 1978-11-14 Gould Inc. Electric fuse with equalized filler duty
CH660812A5 (en) 1982-11-09 1987-06-15 Bbc Brown Boveri & Cie Overvoltage suppressor having metal-oxide varistors, and a method for its production
JPS61168902A (ja) * 1985-01-22 1986-07-30 富士電機株式会社 チツプ型電圧非直線抵抗磁器
JPH0316256Y2 (fr) * 1985-09-24 1991-04-08
JPH0347285Y2 (fr) * 1985-10-02 1991-10-08
JPH0210805A (ja) * 1988-06-29 1990-01-16 Murata Mfg Co Ltd 積層型バリスタ
JPH056804A (ja) * 1991-06-27 1993-01-14 Murata Mfg Co Ltd チツプバリスタ
JPH07272751A (ja) * 1994-03-30 1995-10-20 Yuasa Corp ナトリウム−硫黄電池モジュール
AT406207B (de) * 1997-09-30 2000-03-27 Felten & Guilleaume Ag Oester Steckbarer überspannungsableiter
US6249412B1 (en) * 1999-05-20 2001-06-19 Bourns, Inc. Junction box with over-current protection
JP3826749B2 (ja) * 2001-08-22 2006-09-27 株式会社日立製作所 シャント抵抗を備えた電力変換装置
DE10247307B3 (de) * 2002-10-10 2004-01-22 Siemens Ag Fahrzeugbordnetz
JP2005190735A (ja) * 2003-12-24 2005-07-14 Yazaki Corp ヒュージブルリンクユニット
DE102006008645A1 (de) 2006-02-24 2007-08-30 Robert Bosch Gmbh Varistor
DE102006008644A1 (de) * 2006-02-24 2007-08-30 Robert Bosch Gmbh Elektronisches Bauelement mit Überlastungsschutz
US20080117555A1 (en) * 2006-11-17 2008-05-22 AC Data Systems of Idaho, Inc. Anti-arcing system for power surge protectors
DE102008026555B4 (de) * 2008-06-03 2016-08-04 DEHN + SÖHNE GmbH + Co. KG. Überspannungsschutzgerät mit thermischer Abtrennvorrichtung
JP3149087U (ja) * 2008-12-25 2009-03-12 岡谷電機産業株式会社 サージ吸収器
DE102012011241A1 (de) * 2012-06-06 2013-12-12 Phoenix Contact Gmbh & Co. Kg Kontaktelement für einen Varistor

Also Published As

Publication number Publication date
CN104380396A (zh) 2015-02-25
DE102012011241A1 (de) 2013-12-12
CN104380396B (zh) 2017-09-22
JP2015524170A (ja) 2015-08-20
EP2859561B1 (fr) 2020-07-22
US9601243B2 (en) 2017-03-21
US20150170803A1 (en) 2015-06-18
WO2013182276A1 (fr) 2013-12-12

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