WO2004047137A1 - Declencheur de secours pour disjoncteur de protection de moteur - Google Patents

Declencheur de secours pour disjoncteur de protection de moteur Download PDF

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Publication number
WO2004047137A1
WO2004047137A1 PCT/EP2003/012867 EP0312867W WO2004047137A1 WO 2004047137 A1 WO2004047137 A1 WO 2004047137A1 EP 0312867 W EP0312867 W EP 0312867W WO 2004047137 A1 WO2004047137 A1 WO 2004047137A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
switch
auxiliary
motor protection
motor
Prior art date
Application number
PCT/EP2003/012867
Other languages
German (de)
English (en)
Inventor
Wolfgang Esser
Original Assignee
Moeller 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 Gmbh filed Critical Moeller Gmbh
Publication of WO2004047137A1 publication Critical patent/WO2004047137A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • H01H2071/0278—Mounting several complete assembled circuit breakers together with at least one of juxtaposed casings dedicated to an auxiliary device, e.g. for undervoltage or shunt trip

Definitions

  • the invention relates to an auxiliary release for motor protection switches, with a trigger housing which can be attached to the switch housing of a motor protection switch, the first connecting terminals for applying an electrical variable to be monitored, and an electromagnet system which has a magnet coil and a magnet armature, the magnet armature having a trigger housing attached to the switch housing corresponding passage openings of the trigger housing and of the switch housing at least indirectly reach the latching system connected to the switch lock of the motor protection switch,
  • Motor protection switches are designed with multiple poles according to document DE 35 45 930 A1 and have a corresponding number of main contacts.
  • the main contacts are closed or opened via a key switch either by hand or by a motor drive.
  • the bimetallic or magnetic triggers respond, which in turn release the latching mechanism of the key switch and thus trigger the key switch, which leads to the opening of the main contacts.
  • auxiliary current release for such a motor protection switch is known from the document DE 100 04 597 A1, the auxiliary current release acting either as a shunt release or as an undervoltage release.
  • the auxiliary current release is housed in a release housing that can be attached to the side of the switch housing of the motor protection switch.
  • the triggering signal is fed to the auxiliary current release via two connection terminals, between which the solenoid of an electromagnet and an auxiliary switch are arranged.
  • the spring-loaded magnet armature of the electromagnet actuates the auxiliary switch and a release lever in the event of tripping.
  • the Release lever extends with one arm through the release housing and the switch housing to the latching system of the switch lock of the motor protection switch. In the event of a trip, the release lever releases the key switch, whereupon it switches to the released state and opens the main contacts of the motor protection switch.
  • an electronic motor protection relay which emits a trigger signal in the event of overloads which can lead to the motor being protected and being overheated. This trigger signal is used to control a contactor that switches off the motor.
  • the motor protection relay has an electronic evaluation arrangement, to which measuring signals proportional to the phase currents are supplied on the one hand via current transformers and on the other hand is connected to a thermistor arranged in the motor. The evaluation arrangement checks the incoming signals for short circuit, overload asymmetry, phase failure and temperature overshoot. If criteria defined by the signals are exceeded, a trigger signal is issued to switch off the contactor.
  • the invention has for its object to improve protection for motorized systems.
  • thermistor protection switch By evaluating an electrical quantity that is supplied by a thermistor connected to the motor-operated system to be switched and protected, and by switching off the motor, which is caused by a critical temperature being exceeded within the motor-operated system, it is connected to the auxiliary release Motor protection switch provided a protective function, which also exists in addition to the usual protective functions based on the evaluation of the motor current.
  • the thermistor is installed either in the motor itself or within the driven system, for example at a temperature-critical bearing point.
  • the auxiliary trigger according to the invention is in combination with a Conventional motor protection switches are a convenient alternative to the known combination of a contactor and an electronic motor protection relay with a thermistor monitoring function. With the invention, an effective combination of the thermistor protection function with the isolator and main switch properties, such as the lockability of the handle of the motor protection switch, is made possible.
  • a first advantageous development of the invention consists in the fact that the magnetic armature itself triggers the switching lock.
  • the magnet armature acts either on a release element, e.g. through release openings of the release housing and the switch housing. in the form of a trigger shaft or a trigger slide, or on the latching mechanism of the switch lock arranged in the motor protection switch.
  • a second advantageous development of the invention consists in the fact that the magnetic armature of the auxiliary release indirectly triggers the switching lock via a transmission element.
  • the transmission element either acts on a triggering element via passage openings, e.g. in the form of a trigger shaft or a trigger slide, or on the latching mechanism of the key switch.
  • the trigger housing is expediently to be connected laterally to the switch housing.
  • Figure 2 a first schematic diagram of a combination of motor protection switch and auxiliary release
  • Figure 3 a second schematic diagram of a combination of motor protection switch and auxiliary release.
  • FIG. 1 shows a conventional three-pole motor protection switch 2 with a switch housing 4, a rotatable handle 6 mounted on the front for switching on and off, main connections 8 on the input side for feed lines and main connections 10 on the output side for connecting lines to a motor as a consumer. Furthermore, an auxiliary release 12 is shown with a release housing 14, a pair of first connection terminals 21 for an electrical variable to be monitored and a pair of second connection terminals 22 for a supply voltage. With the aid of connecting means, of which only two locking hooks 15 formed in the rear area of the trigger housing 14 can be seen in FIG. 1, the auxiliary trigger 12 can be connected laterally to the motor protection switch 2.
  • a first passage opening 16 is also formed on the trigger housing 14, through which an extension 18 extends which, when the auxiliary trigger 12 is connected to the motor protection switch 2, can trigger the switching lock arranged in the switch housing 4.
  • An exit window 24 for a lighting element is also provided on the trigger housing 14.
  • auxiliary release 12 With the help of the schematic representation of FIG. 2, further features of the auxiliary release 12 and the function thereof in combination with the motor protection switch 2 are to be explained below.
  • the switch housing 4 there is a separable connection for all three poles from the feed-in main connections 8 via main contacts 26 and from these a connection via thermally delayed overload releases 28 and electromagnetic short-circuit releases 30 to the consumer-side main connections 10.
  • the main contacts 26 are made via the switch lock 32 either opened and closed by means of the handle 6 or opened automatically when the current flowing through the main contacts 26 exceeds adjustable error criteria.
  • the main connections 10 on the consumer side are connected to a motor 38, in the stator of which a thermistor 40 is embedded as a thermal sensor.
  • the electrical quantity (current, voltage or resistance) supplied by the thermistor 40 is led via the first connection terminals 21 to an electronic evaluation arrangement 42 in the auxiliary release 12.
  • the evaluation arrangement 42 is supplied with voltage via the second connection terminals 22.
  • the electrical variable supplied by the thermistor 40 for example the resistance value, is continuously detected via the evaluation arrangement 42. If this electrical variable shows a significant change as a result of inadmissible heating of the motor 38, the evaluation arrangement 42 excites a magnet coil 44 which belongs to an electromagnet system, of which the movable magnet armature 46 is also shown in FIG. 2.
  • the magnet armature 46 engages with its push-shaped extension 18 through the first passage opening 16 in the trigger housing 14 and through an opposite second passage opening 17 in the switch housing 4.
  • the magnet armature 46 becomes so far into the interior of the magnet coil 44 against a return spring (not shown) pulled (to the right in FIG. 2) that the extension 18, with its free end, displaces the trigger slide 34 in such a way that the switching lock 32 is triggered and thus the motor 38 is switched off via the subsequent opening of the main contacts 26.
  • the auxiliary release 12 is also provided with a lighting element 48, preferably with an LED element. After the limit value exceeded by the quantity supplied by thermistor 40, the lighting element 48 is opened by the evaluation arrangement 42, so that the excess triggering of the permissible temperature in the motor 38 is signaled optically on the auxiliary trigger 12.
  • Fig. 3 shows the combination of the motor protection switch 2 with an auxiliary release 13 of another embodiment. Only the features and properties that differ from the embodiment from FIG. 2 are described below. In this case, reference numerals used from FIG. 2 are adopted if they relate to function elements which have essentially the same effect.
  • a magnet armature 47 When the magnet coil 44 is excited by the evaluation arrangement 42, a magnet armature 47 is set against a reset applied spring force, so that it performs a movement to the right according to FIG. 3. As a result of this movement, the magnet armature 47 hits a first lever arm 51 of a double-arm transmission element 50 with a push-shaped extension 19, which is pivotably mounted in the trigger housing 14.
  • the transmission member 50 extends with its second lever arm 52 through the lateral passage openings 16 and 17 in the trigger housing 14 or switch housing 4.
  • the magnet 50 which is acted upon magnetically, causes the transmission member 50 to be pivoted counterclockwise as far as shown in FIG. 3, that the second lever arm 52 strikes the latching system 36 and thereby triggers the switching lock 32.
  • the evaluation coil 42 excites the relay coil 54 of an auxiliary relay arranged in the auxiliary release 12, as a result of which the associated relay contact 56 is actuated.
  • signal lines connected to the third connecting terminals 23 connected to the relay contact 56 can be used to report that the permissible motor temperature has been exceeded.
  • the combinations of motor protection switch 2 and auxiliary releases 12 and 13 have the usual protection options against overload and short circuit and offer additional protection by evaluating the motor temperature detected directly by thermistor 40.
  • the auxiliary switch 12 according to FIG. 2 can also be equipped with an auxiliary relay 54, 56 according to FIG. 3.
  • the auxiliary switch 13 according to FIG. 3 can additionally be equipped with a lighting element 48 according to FIG. 2.
  • the electrical variable detected by the auxiliary release 12 or 13 can be taken from a thermistor, which is attached to a critical point within the machine or system operated by the motor 38, in particular to a bearing threatened by hot running.

Landscapes

  • Protection Of Generators And Motors (AREA)

Abstract

La présente invention concerne un déclencheur de secours (12) dont le boîtier (14) peut être monté sur le boîtier (4) d'un disjoncteur de protection de moteur (2). Ce déclencheur de secours comprend des premières bornes de connexion (21) conçues pour appliquer une grandeur électrique à surveiller et un système à électroaimant dont l'induit magnétique (46) se trouve en liaison active de déclenchement avec le système de verrouillage (36) sur le verrou de commutation (32) du disjoncteur de protection de moteur (2). Le déclencheur de secours (12) comprend une unité d'évaluation électronique (42) qui est reliée côté entrée aux premières bornes de connexion et côté sortie à la bobine magnétique (44) du système à électroaimant. La grandeur à surveiller est fournie par une thermistance (40) qui est reliée à un moteur (38) alimenté par l'intermédiaire du disjoncteur de protection de moteur (2).
PCT/EP2003/012867 2002-11-20 2003-11-18 Declencheur de secours pour disjoncteur de protection de moteur WO2004047137A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10254038.1 2002-11-20
DE2002154038 DE10254038A1 (de) 2002-11-20 2002-11-20 Hilfsauslöser für Motorschutzschalter

Publications (1)

Publication Number Publication Date
WO2004047137A1 true WO2004047137A1 (fr) 2004-06-03

Family

ID=32240184

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/012867 WO2004047137A1 (fr) 2002-11-20 2003-11-18 Declencheur de secours pour disjoncteur de protection de moteur

Country Status (2)

Country Link
DE (1) DE10254038A1 (fr)
WO (1) WO2004047137A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1724803A2 (fr) * 2005-05-17 2006-11-22 Bticino S.P.A. Dispositif électronique associable à un appareil électrique
WO2008034398A1 (fr) * 2006-09-21 2008-03-27 Siemens Aktiengesellschaft Déclencheur auxiliaire pour commutateur de puissance
WO2008145511A1 (fr) * 2007-05-31 2008-12-04 Arcelik Anonim Sirketi Moteur électrique
CN102651292A (zh) * 2011-02-22 2012-08-29 Ls产电株式会社 断路器
WO2014056707A3 (fr) * 2012-10-11 2014-08-07 Bender Gmbh & Co. Kg Dispositif de surveillance de courant différentiel à détection d'arc
US9767977B2 (en) 2011-11-02 2017-09-19 Siemens Aktiengesellschaft Force amplification module for an electrical switching device, unit comprising force amplification module and shunt release, as well as electrical switching device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013005439A1 (de) * 2013-03-30 2014-04-10 Leoni Bordnetz-Systeme Gmbh Sicherungseinrichtung zur Absicherung zumindest einer elektrischen Leitung eines Bordnetzes eines Kraftfahrzeuges

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949239A (en) * 1974-06-24 1976-04-06 International Telephone And Telegraph Corporation Circuit for actuating a monostable or bistable inductive device
DE3018258A1 (de) * 1980-05-13 1981-11-19 Condor-Werk Gebr. Frede KG Elektro- und Maschinenfabrik, 4722 Ennigerloh Schutzschalter mit temperaturfuehlergesteuerter ausloesevorrichtung
US4568899A (en) * 1984-03-27 1986-02-04 Siemens Aktiengesellschaft Ground fault accessory for a molded case circuit breaker
EP0473246A1 (fr) * 1990-08-30 1992-03-04 Mk Electric Limited Perfectionnements aux dispositifs de commande électrique
DE29713363U1 (de) * 1997-07-28 1998-01-08 ESG Elektroschaltgeräte Görlitz GmbH, 02827 Görlitz Formgehäuse für einen Auswertemodul zum Motorvollschutz
US5841616A (en) * 1994-07-23 1998-11-24 Delta Circuit Protection & Controls Limited Module for use with a miniature circuit breaker
EP1056180A2 (fr) * 1999-05-27 2000-11-29 ABBPATENT GmbH Disjoncteur de moteur pour moteur électrique
FR2817078A1 (fr) * 2000-11-21 2002-05-24 Hager Electro Dispositif de commande a distance pour appareillage modulaire de protection

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949239A (en) * 1974-06-24 1976-04-06 International Telephone And Telegraph Corporation Circuit for actuating a monostable or bistable inductive device
DE3018258A1 (de) * 1980-05-13 1981-11-19 Condor-Werk Gebr. Frede KG Elektro- und Maschinenfabrik, 4722 Ennigerloh Schutzschalter mit temperaturfuehlergesteuerter ausloesevorrichtung
US4568899A (en) * 1984-03-27 1986-02-04 Siemens Aktiengesellschaft Ground fault accessory for a molded case circuit breaker
EP0473246A1 (fr) * 1990-08-30 1992-03-04 Mk Electric Limited Perfectionnements aux dispositifs de commande électrique
US5841616A (en) * 1994-07-23 1998-11-24 Delta Circuit Protection & Controls Limited Module for use with a miniature circuit breaker
DE29713363U1 (de) * 1997-07-28 1998-01-08 ESG Elektroschaltgeräte Görlitz GmbH, 02827 Görlitz Formgehäuse für einen Auswertemodul zum Motorvollschutz
EP1056180A2 (fr) * 1999-05-27 2000-11-29 ABBPATENT GmbH Disjoncteur de moteur pour moteur électrique
FR2817078A1 (fr) * 2000-11-21 2002-05-24 Hager Electro Dispositif de commande a distance pour appareillage modulaire de protection

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1724803A2 (fr) * 2005-05-17 2006-11-22 Bticino S.P.A. Dispositif électronique associable à un appareil électrique
EP1724803A3 (fr) * 2005-05-17 2008-01-23 Bticino S.P.A. Dispositif électronique associable à un appareil électrique
WO2008034398A1 (fr) * 2006-09-21 2008-03-27 Siemens Aktiengesellschaft Déclencheur auxiliaire pour commutateur de puissance
WO2008145511A1 (fr) * 2007-05-31 2008-12-04 Arcelik Anonim Sirketi Moteur électrique
CN102651292A (zh) * 2011-02-22 2012-08-29 Ls产电株式会社 断路器
EP2492944A3 (fr) * 2011-02-22 2012-11-21 LSIS Co., Ltd. Disjoncteur
US8796573B2 (en) 2011-02-22 2014-08-05 Lsis Co., Ltd. Circuit breaker
US9767977B2 (en) 2011-11-02 2017-09-19 Siemens Aktiengesellschaft Force amplification module for an electrical switching device, unit comprising force amplification module and shunt release, as well as electrical switching device
WO2014056707A3 (fr) * 2012-10-11 2014-08-07 Bender Gmbh & Co. Kg Dispositif de surveillance de courant différentiel à détection d'arc

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Publication number Publication date
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