EP2551885A1 - Dispositif de protection contre les températures excessives pour un disjoncteur électrique - Google Patents

Dispositif de protection contre les températures excessives pour un disjoncteur électrique Download PDF

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Publication number
EP2551885A1
EP2551885A1 EP11175849A EP11175849A EP2551885A1 EP 2551885 A1 EP2551885 A1 EP 2551885A1 EP 11175849 A EP11175849 A EP 11175849A EP 11175849 A EP11175849 A EP 11175849A EP 2551885 A1 EP2551885 A1 EP 2551885A1
Authority
EP
European Patent Office
Prior art keywords
temperature
sensitive element
switching
protection device
pawl
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Withdrawn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
EP11175849A
Other languages
German (de)
English (en)
Inventor
Klaus Dauer
Günter Baujan
Lothar Winzen
Anke Juelich
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 Industries GmbH
Original Assignee
Eaton Industries 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 Eaton Industries GmbH filed Critical Eaton Industries GmbH
Priority to EP11175849A priority Critical patent/EP2551885A1/fr
Priority to PCT/EP2012/064441 priority patent/WO2013014133A1/fr
Publication of EP2551885A1 publication Critical patent/EP2551885A1/fr
Withdrawn legal-status Critical Current

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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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/18—Electrothermal mechanisms with expanding rod, strip, or wire
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
    • H01H71/322—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with plunger type armature
    • 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
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • 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
    • H01H71/145—Electrothermal mechanisms using shape memory materials

Definitions

  • the invention relates to an overtemperature protection device for an electrical protection switching device, in particular for a multi-pole, electronically ausgestaltetes low-voltage switching device.
  • thermosensitive elements in particular bimetal strips are used, which are heated by the operating current directly or at higher currents through the converter.
  • These thermal overload triggers triggered via the temperature-sensitive element when a set current value delayed, the circuit breaker via Schlossentklinkung.
  • the invention is not based on this type of current-dependent thermal overload release.
  • Thermostatic protective devices with bimetal are known for kettles DE 561552 ,
  • Today's low voltage switchgear includes expensive electronic components that are temperature sensitive. If device defects occur in such low-voltage switchgear, not inconsiderable damage or costs can arise. Possible defects can be defects in the electronics (for example malfunction watchdog of the electronics or defects of the trip block (for example due to corroded and therefore in the state of insulation transferred contact springs).
  • the object of the invention is to protect an electronically configured protective switching device in case of switching device defects against overheating of the electronic components.
  • the essence of the invention lies in the fact that a temperature-sensitive element lying outside the current paths of the protective switching device, preferably a bimetallic element engages in the switching mechanism of the switching device when a predeterminable device temperature is exceeded, triggers a latching detent and opens the contactor of the circuit breaker.
  • temperature-sensitive is meant that a temperature-related change of length and / or shape of the element takes place.
  • the protective switching device comprises a first triggering and actuating device receiving space and a second, the contact apparatus receiving space. Between triggering and actuating apparatus and contact apparatus is installed a pawl, the application of the triggering and / or actuating device triggers a Schlossentklinkung.
  • the engagement of the temperature-sensitive element should be done on the pawl of the circuit breaker.
  • an actuating lug is arranged, which is acted upon by the temperature-sensitive element when the switching temperature is exceeded, wherein the Schlossentklinkung the circuit breaker is triggered.
  • the arrangement of the temperature-sensitive element in the protective switching device is made such that the change in shape of the temperature-sensitive element can take place in a temperature range below the switching temperature without spatial disability.
  • the temperature sensitive element may be a bimetallic strip or made of a shape memory alloy.
  • the bimetallic strip is preferably formed as a flat strip. He is stationarily mounted with a fixed end in the circuit breaker and facing with a swivel end of the pawl of the circuit breaker, where it is mounted engaging in the switching mechanism (stop on the pawl).
  • the pawl is mounted in an axis parallel to the lock base.
  • Fig. 1 shows details as an exploded view of a multi-pole circuit breaker, wherein a housing made of molding material is omitted.
  • the details of Fig. 1 relate to the actuating and triggering apparatus of the switching device, wherein the details and the illustration essentially from the DE 102005037437 A1 are taken.
  • the lock base 110 separates a first, upper installation space B 1 from a second, lower installation space B2.
  • Actuator and trip device of the protection device are in the first space.
  • the second space B2 essentially comprises the contactor of the circuit breaker, Connection and expansion contacts and, for example, locking elements for mounting on DIN rails.
  • the actuating apparatus essentially comprises an actuating shaft 40, 45, which is activated manually via a rotary knob 42.
  • the actuating shaft is a multi-part assembly of shaft 44 and slip-on shaft 60, which are plugged onto the drive shaft 45.
  • trip unit 10 with housing 11; Magnetic coil 12 with magnet armature 14 and a (located inside the trip unit) permanent magnet.
  • the essential function of the trip device consists in the mechanical power storage for the movement of the double-armed lever 30 during the off.
  • the tripping unit 10 is fixed by at least one fastening means (screw, plug or clamping means) (here a plug-in pin 19) with fastening counter-means (here hole 119 on the lock base 110).
  • fastening means screw, plug or clamping means
  • fastening counter-means here hole 119 on the lock base 110.
  • the spatial assignment of the Aufsteckzapfens 19 with the hole 119 is represented by the line AA.
  • Magnetic armature 14 and double arm 30 are in positive operative connection via the groove 15 on the trigger plunger and the fork 35 on the double arm 30, so that the movement of the magnet armature is transmitted respectively to the Doppelarmhebel 30.
  • the rotational movement (H1, H2) of the double-arm lever 30 connected to the linear movement (L1, L2) of the magnet armature has approximately an angular range of 25 ° to 30 °.
  • the double-arm lever 30 is mounted axially parallel to the actuating shaft 44 and the armature 14 perpendicular to the Doppelarmhebel 30.
  • a driver 36 is arranged at the double arm 30, a driver 36 is arranged. The driver 36 passes through the window 111 in the lock base 110.
  • the circuit breaker is operated on the knob 42, with which an OFF and an ON position with a rotation of 90 ° is switchable.
  • the shaft 40 is turned 90 ° clockwise from the position OFF in Direction D2 moves, the double arm lever performs the movement H2.
  • the armature 14 is moved linearly with L1.
  • the shaft 40 is moved from the ON position in the direction D1 with 90 ° counterclockwise rotation, with the double-arm lever performing the movement H1.
  • the armature 14 is moved linearly with L2.
  • the actuating shaft releases the lock in the switch drive mechanism and opens the switch contacts. For manual switch-off, a short turn in the opposite direction is sufficient to operate the lock.
  • tension release unit is activated with a left turn D1 of the knob 42 (and the actuating shaft 40, 45) about axis HA from the OFF position by about 20 ° to 30 ° (ie in the opposite direction to the ON-switching movement) of the trip device , About this manual operation of the mechanical power storage (release unit 10) is transferred to the switch-on position.
  • the magnet armature 14 is brought to a permanent magnet (in the trip unit 10) and held there magnetically. After tensioning the trigger apparatus of the double arm 30 is together with the driver 36 in a fixed position. After the process 'clamping' engages the latch hook 84 of the pawl 80 to a support lever, not shown, of the contact apparatus.
  • the pawl 80 is formed as a two-armed lever (80 ', 80 ") and rotatably supported.
  • the return spring 85 engages, which loads the pawl in the direction of a support lever in the contact apparatus
  • a contact dome 82 available, which can be acted upon by the driver 36.
  • the triggering (fault opening) by an electromagnetic or electronic control module is done at sufficiently high current to the winding of the trigger coil 12.
  • the magnetic attraction of the permanent magnet is weakened and the armature 14 dissolves supported by the force of the accumulator pressure spring (in Fig. 1 not recognizable) from (with movement L2).
  • the deflection of the pivot end of the bimetallic strip 200 occurs within normal operating temperatures without contact with components of the circuit breaker.
  • a presettable switching temperature which is above a recordable in normal operation temperature of the circuit breaker, the free pivot end of the bimetallic strip passes to the stop lug 81 of the pawl 80.
  • a temperature above 150 ° C should be set as the switching temperature, which is the maximum temperature for represents the continuous operation of the circuit breaker.
  • a double web 113 is formed in the circuit breaker, which releases a slot to the inside.
  • the bimetallic strip 200 is fixed at its fixed end 202 in the slot.
  • the bimetallic strip may be designed over its entire length as a flat strip or it may be formed thickened at the bottom end, wherein the thickening is inserted in the slot.
  • the thickened end 202 is seated in the slot of the double bridge 113.
  • Other mounting options are to fasten the flat strip at the fixed end with screws or pins.
  • the mentioned types of attachment are to be understood as exemplary only, with other suitable mounting options can be easily set by the skilled person.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP11175849A 2011-07-28 2011-07-28 Dispositif de protection contre les températures excessives pour un disjoncteur électrique Withdrawn EP2551885A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11175849A EP2551885A1 (fr) 2011-07-28 2011-07-28 Dispositif de protection contre les températures excessives pour un disjoncteur électrique
PCT/EP2012/064441 WO2013014133A1 (fr) 2011-07-28 2012-07-23 Dispositif de sécurité thermique pour un disjoncteur de protection électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11175849A EP2551885A1 (fr) 2011-07-28 2011-07-28 Dispositif de protection contre les températures excessives pour un disjoncteur électrique

Publications (1)

Publication Number Publication Date
EP2551885A1 true EP2551885A1 (fr) 2013-01-30

Family

ID=46545410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11175849A Withdrawn EP2551885A1 (fr) 2011-07-28 2011-07-28 Dispositif de protection contre les températures excessives pour un disjoncteur électrique

Country Status (2)

Country Link
EP (1) EP2551885A1 (fr)
WO (1) WO2013014133A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE561552C (de) 1928-12-18 1932-10-15 Elektrobeheizung G M B H Temperaturabhaengiger Schutzschalter mit Bimetallfeder, insbesondere fuer elektrisch beheizte Geraete
DE3840063A1 (de) 1988-11-28 1990-05-31 Kloeckner Moeller Elektrizit Thermisches relais
US5608367A (en) * 1995-11-30 1997-03-04 Eaton Corporation Molded case circuit breaker with interchangeable trip unit having bimetal assembly which registers with permanent heater transformer airgap
EP1225612A2 (fr) 2001-01-19 2002-07-24 Siemens Aktiengesellschaft Déclencheur thermique pour un dispositif de commutation
DE102005037437A1 (de) 2005-08-09 2007-02-15 Moeller Gmbh Elektrischer Schutzschalter mit Schutzfunktion
DE102006005697A1 (de) * 2006-02-08 2007-08-16 Moeller Gmbh Einrichtung zum Auslösen eines elektrischen Schaltgeräts
DE102009017100A1 (de) * 2009-04-15 2010-10-21 Abb Ag Thermischer Auslöser und Installationsschaltgerät mit einem thermischen Auslöser

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE561552C (de) 1928-12-18 1932-10-15 Elektrobeheizung G M B H Temperaturabhaengiger Schutzschalter mit Bimetallfeder, insbesondere fuer elektrisch beheizte Geraete
DE3840063A1 (de) 1988-11-28 1990-05-31 Kloeckner Moeller Elektrizit Thermisches relais
US5608367A (en) * 1995-11-30 1997-03-04 Eaton Corporation Molded case circuit breaker with interchangeable trip unit having bimetal assembly which registers with permanent heater transformer airgap
EP1225612A2 (fr) 2001-01-19 2002-07-24 Siemens Aktiengesellschaft Déclencheur thermique pour un dispositif de commutation
DE102005037437A1 (de) 2005-08-09 2007-02-15 Moeller Gmbh Elektrischer Schutzschalter mit Schutzfunktion
DE102006005697A1 (de) * 2006-02-08 2007-08-16 Moeller Gmbh Einrichtung zum Auslösen eines elektrischen Schaltgeräts
DE102009017100A1 (de) * 2009-04-15 2010-10-21 Abb Ag Thermischer Auslöser und Installationsschaltgerät mit einem thermischen Auslöser

Also Published As

Publication number Publication date
WO2013014133A1 (fr) 2013-01-31

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