EP2263246B1 - Schaltgerät - Google Patents

Schaltgerät Download PDF

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Publication number
EP2263246B1
EP2263246B1 EP09717343A EP09717343A EP2263246B1 EP 2263246 B1 EP2263246 B1 EP 2263246B1 EP 09717343 A EP09717343 A EP 09717343A EP 09717343 A EP09717343 A EP 09717343A EP 2263246 B1 EP2263246 B1 EP 2263246B1
Authority
EP
European Patent Office
Prior art keywords
switchgear
switching
bimetal element
conductor
bimetallic element
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.)
Active
Application number
EP09717343A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2263246A1 (de
Inventor
Adolf Tetik
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.)
Eaton GmbH
Original Assignee
Moeller Gebaudeautomation GmbH
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 Moeller Gebaudeautomation GmbH filed Critical Moeller Gebaudeautomation GmbH
Priority to SI200930096T priority Critical patent/SI2263246T1/sl
Priority to PL09717343T priority patent/PL2263246T3/pl
Publication of EP2263246A1 publication Critical patent/EP2263246A1/de
Application granted granted Critical
Publication of EP2263246B1 publication Critical patent/EP2263246B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/164—Heating elements

Definitions

  • the invention relates to a switching device according to the preamble of claim 1.
  • Switching devices which, in the event of excessive currents in a line network, which continue over a predefinable time, separate this line network from a supply network in order to prevent the further supply of electrical current.
  • damage such as a cable fire, which could arise due to the increased heating of the conductors due to the excessive current flow, avoided.
  • Such switching devices therefore have a so-called.
  • Overcurrent tripping device which comprises approximately a bimetallic element, which is heated under the action of the current flow in the line network, whereby the bimetallic element is bent.
  • the bimetal triggers a mechanical release device, which separates the switching contacts of the switching device, and prevents the further flow of current.
  • the DE 33 38 799 A1 describes a circuit breaker with a thermal release, which comprises a bimetallic element heated in direct current flow. At the junctions of the bimetallic element to the terminal lugs or another strand each one element of an electrical resistance material between the bimetallic element and the terminal lug or the strand is arranged to prevent the heat dissipation from the bimetallic element or to heat this. From the US 4 486 732 A is an environment-compensated motor protection element, with a bimetallic element and a heating element known.
  • the DE 10 2006 005697 A1 discloses a device for triggering a switching device which has a bimetallic element as Studentssäomauslöser
  • the object of the invention is therefore to provide a switching device of the type mentioned, with which the mentioned disadvantages can be avoided, and with which the accuracy and the degree of reproducibility of the triggering of the switching device, as well as the adjustment of the overcurrent tripping device can be improved.
  • the heat dissipation or cooling of the bimetallic element can be reduced by fixing it.
  • the removal of heat or cooling of the bimetallic element on its attachment causes the bending of the bimetallic depends not only on the size or height of the current in the current path through the switching device, but also of other sizes, which are not necessarily in relation to the Amount of current are, which has the consequence that the release of known switching devices can be inaccurate and little reproducible. Due to the features of claim 1, the accuracy and the degree of reproducibility of the triggering of the switching device by the Bimetal element can be increased. As a result, the adjustment of the bimetal element or the overcurrent release device can be improved.
  • the Fig. 1 shows a switching device 1, preferably power switch, with at least one input terminal 2 and at least one output terminal 3 for connecting electrical conductors, and with a first switching contact 4 and a second switching contact, wherein the switching contacts 4 in a closed position, a current path between the input terminal 2 and Close the output terminal 3, wherein an overcurrent tripping device 6 is provided for separating the first switching contact 4 and the second switching contact, and wherein the overcurrent tripping device 6 comprises at least one bimetallic element 7, which is heated by the electric current flow, wherein in the region of a fastening 8 of the bimetallic element 7 at least a heat insulator 9 is arranged to reduce the heat dissipation from the bimetallic element 7.
  • the heat dissipation or cooling of the bimetallic element 7 can be reduced via its attachment 8.
  • the heat dissipation or cooling of the bimetallic element 7 via its attachment 8 causes the bending of the bimetallic element 7 depends not only on the size or height of the current in the current path through the switching device 1, but also of other sizes, which are not mandatory in relation to the amount of current, which has the consequence that the release of known switching devices 1 can be inaccurate and not very reproducible. Due to the features of the invention, the Accuracy and the degree of reproducibility of the triggering of the switching device 1 by the bimetallic element 7 can be increased. As a result, the adjustment of the bimetallic element 7 or the overcurrent release device 6 can be improved.
  • Fig. 1 shows a series of modules of a preferred embodiment of a switching device 1 according to the invention in axonometric exploded view. Shown is an embodiment of a switching device 1 with three switching paths or current paths, wherein any predeterminable number of switching paths or switchable current paths can be provided. Switching devices 1 according to the invention are preferably provided with one, two, three or four current paths. According to the number of current paths respectively the same number of input terminals 2 and output terminals 3 are provided. In the Fig. 1 to 4 In each case, only housing-fixed parts of the input terminals 2 and output terminals 3 are shown. The respective input terminals 2 and output terminals 3 generally include in addition to the illustrated parts, in each case at least one clamping screw, and preferably in each case at least one movable by means of the clamping screw terminal cage.
  • the switching device 1 comprises an insulating material housing, which in the preferred embodiment comprises a lower housing shell 15 and an upper housing shell 16.
  • the at least one first switching contact 4 is in a closed position on the at least one second switching contact, which is not visible in the embodiment shown within the assembly of the arc extinguishing chamber 14.
  • the bimetallic element 7 is fastened to a specifiable location within the scarf device 1. It is preferably provided - as shown - that the bimetallic element 7 is attached to a first conductor 10 of the current path, which is preferably associated with the input terminal 2 and / or the output terminal 3. In the illustrated preferred embodiment, the bimetallic element 7 is directly traversed by current, so is itself part of the current path, and is directly heated by the stream. However, it can also be provided that the bimetallic element is heated completely or additionally indirectly by, for example, a current-carrying conductor is arranged on the bimetal element 7. By attaching the bimetallic element 7 to the first conductor 10, the preferred embodiment is advantageously supported, as this leads to a particularly simple and cost-effectively manufacturable construction.
  • the bimetallic element 7 With increasing heating of the bimetallic element 7 due to the current flow, this is bent more and more.
  • the bimetallic element 7 causes a tripping of the overcurrent tripping device 6, which either directly, or via another, cooperating with the overcurrent tripping device 6 or controlled by this mechanical release device, the switching contacts 4 of the switching device 1 separates, and prevents the further flow of current.
  • the illustrated preferred embodiment of a switching device 1 has a folding lever 18 for this purpose.
  • the folding lever 18 can be controlled directly from the bimetallic element 7. It is preferably provided that the bimetallic element 7 - as in the FIGS.
  • the trip shaft 13 is also associated with a preferably further arranged in the switching device 1 short-circuit release 19, and this short-circuit release 19 is adapted to actuate the trip shaft 13 by means of a folding lever 18.
  • the switching mechanism 5 is used for manual opening and closing of the switching contacts 4 by means of the actuating lever 17, as well as for disconnecting the switching contacts 4 upon activation of the overcurrent tripping device 6 and the short-circuit release 19.
  • Die Fig. 2 to 6 show different views of a preferred embodiment of an arrangement of bimetallic element 7 and the first switching contact 4, wherein in the region of a fastening 8 of the bimetallic element 7 at least one heat insulator 9 is arranged to reduce the heat dissipation of the bimetallic element 7.
  • the bimetallic element 7 is fastened with a first end 21 to the first conductor 10, wherein in addition to the illustrated fastening by means of a connecting rivet 12, the fastening by means of screws, clamps, welding or soldering can be provided.
  • a flexible conductor 20 is arranged, which connects the bimetallic element 7 with the first switching contact 4.
  • any type of heat insulator 9 may be provided.
  • insulators comprising glass and / or ceramic can be provided.
  • the heat insulator 9 is formed as a metallic electrical conductor, wherein further preferably provided that the heat insulator 9 are formed to increase the electrical resistance in the region of the attachment 8. This can be achieved in addition to the reduction of heat dissipation and cooling of the bimetallic element 7 through the first conductor 10 and the input or output terminal 2, 3 in addition, that the bimetallic element 7 is additionally heated by the heat insulator 9.
  • the heat insulator 9 comprises a plate 11, which is arranged between the first conductor 10 and the bimetallic element 7.
  • a plate 11 or such a sheet both high mechanical stability, as well as a high degree of thermal insulation can be achieved.
  • the plate 11 has a thermal conductivity which is less than 350 W / (m * K), in particular less than 200 W / (m * K), preferably less than 85 W / (m * K).
  • W denotes the power in watts, "m” the linear expansion in meters, "K” the absolute temperature in Kelvin, and "*" the operator for a multiplication.
  • the plate 11 may comprise any material having a lower thermal conductivity than copper, according to a further preferred embodiment already shown may be provided that the plate 11 is still a metallic electrical conductor in the technical sense, therefore, a specific electrical resistance of less than 0.5 ⁇ * mm 2 / m, preferably less than 0.2 ⁇ * mm 2 / m, but greater than the specific electrical resistance of copper (about 0.01724 ⁇ * mm 2 / m).
  • the plate 11 comprising at least one material selected from the group: aluminum, brass, zinc, steel, preferably stainless Steel, nickel, iron, platinum, tin, tantalum, lead and / or titanium, is formed.
  • Particularly preferred hiebei is the execution of the plate 11 comprising steel, preferably stainless steel, whereby a particularly advantageous balance of electrical conductivity, resistance and thermal insulation can be achieved.
  • steel has good mechanical workability and low cost.
  • any type of attachment of the bimetallic element 7 may be provided with the first conductor 10.
  • the bimetallic element 7 is connected to the first conductor 10 by means of at least one connecting rivet 12.
  • the heat insulator 9 comprises only the at least one connecting rivet 12, and is free of plates 11 between the bimetallic element 7 and the first conductor 10.
  • the connecting rivet 12 When forming the connecting rivet 12, it is preferably provided that it has a thermal conductivity which is less than 350 W / (m * K), in particular less than 250 W / (m * K), preferably less than 150 W / (m * K ) is.
  • W denotes the power in watts
  • m the linear expansion in meters
  • K the absolute temperature in Kelvin
  • * the operator for a multiplication.
  • the connecting rivet 12 may comprise any material with a lower thermal conductivity than copper, wherein according to a further preferred embodiment already shown, it may be provided that the connecting rivet 12 is still a metallic electrical conductor in the technical sense, therefore a resistivity less than 0.5 ⁇ * mm 2 / m.
  • the possibility of a ductile mechanical deformability is also essential for the use of a material for use in a connecting rivet 12.
  • the connecting rivets 12 comprising at least one material selected from the group: aluminum, brass, zinc, steel, preferably stainless steel, nickel, iron, platinum, tin, tantalum, lead and or titanium, is formed. It is particularly preferred that the connecting rivet 12 comprises brass, wherein hiebei any type of brass alloy comprising copper and zinc may be provided.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Contacts (AREA)
EP09717343A 2008-03-05 2009-02-17 Schaltgerät Active EP2263246B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200930096T SI2263246T1 (sl) 2008-03-05 2009-02-17 Stikalna naprava
PL09717343T PL2263246T3 (pl) 2008-03-05 2009-02-17 Łącznik

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0035708A AT509407A1 (de) 2008-03-05 2008-03-05 Schaltgerät
PCT/AT2009/000057 WO2009108968A1 (de) 2008-03-05 2009-02-17 Schaltgerät

Publications (2)

Publication Number Publication Date
EP2263246A1 EP2263246A1 (de) 2010-12-22
EP2263246B1 true EP2263246B1 (de) 2011-08-03

Family

ID=40786436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09717343A Active EP2263246B1 (de) 2008-03-05 2009-02-17 Schaltgerät

Country Status (15)

Country Link
US (1) US8026785B2 (ru)
EP (1) EP2263246B1 (ru)
CN (1) CN101527227B (ru)
AR (1) AR070778A1 (ru)
AT (2) AT509407A1 (ru)
AU (1) AU2009221606A1 (ru)
BR (1) BRPI0910247A2 (ru)
CA (1) CA2715429A1 (ru)
ES (1) ES2372093T3 (ru)
IL (1) IL207502A (ru)
PL (1) PL2263246T3 (ru)
RS (1) RS51991B (ru)
RU (1) RU2483385C2 (ru)
SI (1) SI2263246T1 (ru)
WO (1) WO2009108968A1 (ru)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104137214B (zh) * 2012-02-23 2016-07-06 西门子公司 断路器加热器双金属组件、加热器双金属装置及组装方法
US8963029B2 (en) 2012-12-03 2015-02-24 Eaton Corporation Electrical switching apparatus and conductor assembly therefor
CA2887121C (en) * 2012-12-03 2020-04-28 Eaton Corporation Electrical switching apparatus and conductor assembly therefor
CN103903921B (zh) * 2012-12-28 2016-08-17 施耐德电器工业公司 过载保护装置和包括该装置的断路器的热磁可调脱扣器
US9378916B2 (en) * 2013-02-12 2016-06-28 Eaton Corporation Heater apparatus, circuit interrupter, and related method
KR20150044746A (ko) * 2013-10-17 2015-04-27 엘에스산전 주식회사 회로차단기용 트립장치
EP2913836A1 (en) * 2014-02-28 2015-09-02 Siemens Aktiengesellschaft Thermal trip device of a thermal magnetic circuit breaker having a resistor element, thermal magnetic circuit breaker and switching device for interrupting a current flow and method for protecting an electrical circuit from damage
JP6075423B1 (ja) * 2015-09-03 2017-02-08 株式会社明電舎 真空遮断器
DE102016105341B4 (de) * 2016-03-22 2022-05-25 Eaton Intelligent Power Limited Schutzschaltgerät
KR101823516B1 (ko) * 2016-08-31 2018-01-30 엘에스산전 주식회사 직류 배선용 차단기의 트립 장치

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DE102006005697A1 (de) * 2006-02-08 2007-08-16 Moeller Gmbh Einrichtung zum Auslösen eines elektrischen Schaltgeräts
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Also Published As

Publication number Publication date
IL207502A0 (en) 2010-12-30
WO2009108968A1 (de) 2009-09-11
EP2263246A1 (de) 2010-12-22
IL207502A (en) 2013-10-31
RU2483385C2 (ru) 2013-05-27
ES2372093T3 (es) 2012-01-13
CN101527227B (zh) 2013-09-18
RS51991B (en) 2012-04-30
CN101527227A (zh) 2009-09-09
SI2263246T1 (sl) 2012-04-30
AT509407A1 (de) 2011-08-15
BRPI0910247A2 (pt) 2015-09-29
RU2010140615A (ru) 2012-04-10
US20090224864A1 (en) 2009-09-10
PL2263246T3 (pl) 2012-05-31
ATE519215T1 (de) 2011-08-15
US8026785B2 (en) 2011-09-27
CA2715429A1 (en) 2009-09-11
AU2009221606A1 (en) 2009-09-11
AR070778A1 (es) 2010-05-05

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