EP1927121A1 - Procede de determination de l'usure de contacts d'un commutateur electromagnetique et commutateur electromagnetique comportant un dispositif fonctionnant selon ce procede - Google Patents

Procede de determination de l'usure de contacts d'un commutateur electromagnetique et commutateur electromagnetique comportant un dispositif fonctionnant selon ce procede

Info

Publication number
EP1927121A1
EP1927121A1 EP06793351A EP06793351A EP1927121A1 EP 1927121 A1 EP1927121 A1 EP 1927121A1 EP 06793351 A EP06793351 A EP 06793351A EP 06793351 A EP06793351 A EP 06793351A EP 1927121 A1 EP1927121 A1 EP 1927121A1
Authority
EP
European Patent Office
Prior art keywords
contacts
time
sensor
switching device
electromagnetic switching
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
EP06793351A
Other languages
German (de)
English (en)
Other versions
EP1927121B1 (fr
Inventor
Bernd Trautmann
Norbert Elsner
Norbert Mitlmeier
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1927121A1 publication Critical patent/EP1927121A1/fr
Application granted granted Critical
Publication of EP1927121B1 publication Critical patent/EP1927121B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/0015—Means for testing or for inspecting contacts, e.g. wear indicator
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts

Definitions

  • the invention relates to a method for determining the erosion of contacts of an electromagnetic switching device.
  • the invention relates to an electromagnetic switching device with a device for determining the erosion of its contacts.
  • a further auxiliary circuit is required for detecting the time of lifting the contacts, for example, a complex, galvanically decoupled with the aid of optocouplers from the main circuit auxiliary circuit which detects the occurrence of an arc voltage, which is formed by the forming arc when lifting.
  • WO 2004/057634 A1 discloses a method and a device for determining the remaining service life a switching device known in which the change in the pressure during the switching, ie when closing the switch contacts by the magnetic drive, is measured.
  • a position sensor is arranged on the armature, which contains at least three positions markings, for example in the form of measuring contacts, with which the time course of the magnetic armature movement can be detected.
  • the determination of the position of the magnet armature when closing the contacts is determined mathematically from the movement sequence of the magnet armature detected with the aid of these position markers. For this purpose, due to the small number of position marks a simple algorithm is used on the assumption that between see a time before closing the contacts and a time between the closing time of the contacts and the touchdown of the armature on the Magnetj och, the Anchor acceleration is constant. In practice, however, it has been found that with such an approach, the timing of closing the contacts can be determined only with low accuracy.
  • the invention is based on the object to provide a method for determining the burnup of contacts of an electromagnetic switching device, with the accurate determination of the time in which close the contacts, and thus an accurate determination of the contact erosion is possible. In addition, the invention is based on the object to provide an electromagnetic switching device with a device operating according to this method.
  • a mechanical characteristic characterizing the time curve of the relative movement between the contacts caused by an actuator is measured during switching on, and it is determined by evaluation of this time course of the time in which the contacts close, and which is detected by the contacts or the distance traveled by the actuator from this point to its end position distance at least indirectly and compared with a stored reference value ,
  • the invention is based on the consideration that the time course of the relative movement is significantly changed at the time of closing the contacts due to the beginning at this time and the movement of the actuator decelerating high spring force of the contact spring, so that with an analysis of the time course of Movement, the timing of the meeting of the contacts can be determined immediately determined without the need for this a close model of the movement, as is the case with the aforementioned WO 2004/057634 Al case.
  • the parameter characterizing the course of motion can be effected directly by measuring the speed or the acceleration of one of the contacts or both contacts. Alternatively, the speed of this relative movement causing and with at least one of the Kon- clocked mechanically coupled and actuated by an electromagnetic actuator actuator can be measured.
  • the measurement can be carried out with a measuring circuit which is galvanically decoupled from the switched circuit or from the circuit of the magnetic drive.
  • a suitable sensor may be a displacement sensor, a speed sensor or an acceleration sensor.
  • a speed sensor or an acceleration sensor is used as the sensor, its time of contact closure can be determined particularly easily from its measurement signal. In order to obtain information about the distance covered in this case, their measuring signals must still be integrated simply or twice.
  • Figures 1 to 3 each an electromagnetic switching device in a schematic representation of different Times of switching on with unconsumed contacts
  • FIGS. 4 to 5 show the electromagnetic switching device at different times of the switch-on process after a plurality of switching cycles, when the contacts have a significant burn-off
  • Figures 6 to 9 are diagrams in which the voltage across the solenoid and the current flowing through it, the magnetic force and the spring force, the distance between the armature and yoke and the speed of the armature and its acceleration are plotted against time, and Figure 10 shows a schematic representation of a switching device with a device for improved determination of the erosion of the contacts.
  • an electromagnetic switching device in the example shown, a contactor, a magnetic yoke 2, on which two magnetic coils 4 are arranged for magnetic excitation.
  • a magnet armature 6 assigned to the magnet yoke 2 is resiliently supported by compression springs 8 in a housing 10 of the switching device which is illustrated only symbolically.
  • Magnetic yoke 2, magnetic coil 4 and armature 6 form an electromagnetic drive of the switching device.
  • the armature 6 is non-positively connected via a contact spring 12 with a movable contact bridge 14.
  • the movable contact bridge 14 are associated with two fixed contact carrier 16.
  • the magnet armature 6 forms the actuator of the magnetic drive for the relative movement between the contact bridge 14 and the contact carrier sixteenth
  • the contact bridge 14 and the fixed contact carrier 16 are each provided with contact pieces or contacts 18 which have a thickness D 0 in the new state.
  • the switch contact formed by the movable contact bridge 14 and the fixed contact carrier 16 is in open Position. In this switched-off state, the contacts 18 are at a distance So and the pole faces 20 and 60 of the magnetic yoke or the magnet armature 6 are located at a distance H.
  • the force acting on the armature 6 magnetic force is greater than the force exerted by the compression spring 8 and the contact spring 12 spring force, and the armature 6 can continue to move in the direction of Magnetj 2 until it finally, as shown in Figure 3 is, in an end or rest position with its pole faces 60 rests on the PoI- flat 20 of the magnetic yoke 2.
  • the current I (curve a) flowing through the magnet coils and the clocked DC voltage U (curve b) applied to the magnet coils are plotted against the time t.
  • it is a switching device which is driven by a method known, for example, from WO 2005/017933 A1, in order to adjust the closing speed at which the contacts on the one hand and the poles meet on the other hand by regulating the acceleration of the magnet armature.
  • Time t ⁇ of closing the contacts steadily decreases in order to rise again at this time t ⁇ short term. This increase is required to from the time t ⁇ acting abruptly increased spring force on the armature by a correspondingly higher magnetic force to compensate.
  • Fig. 9 the acceleration b of the armature is plotted against time in a logarithmic scale. It can be seen from the curve g that the acceleration b rises rapidly to an approximately constant value and undergoes a sign change at the time of the closing of the contact due to the speed drop. This shift may at an evaluation of the temporal course of the acceleration b particularly easily recognized and for determining the point Sch Schweizerzeit- t ⁇ be used.
  • FIGS. 6 to 9 are used to exemplify the physical conditions prevailing when switching on an electromagnetic switching device.
  • the speed or sign change of the acceleration shown in FIGS. 8 and 9 also results when the electromagnetic switching device is operated unregulated or according to another control method becomes. If now with the aid of a suitable sensor, the velocity v or the acceleration, either directly detected by a velocity sensor or acceleration sensor may, in the course of the closing time t ⁇ loading Sonders be easily determined. Basically, the
  • Closing time t ⁇ are also derived from a measured with a displacement sensor signal by this is once or twice differentiated.
  • a sensor 22 which can be designed as a speed sensor, acceleration sensor or displacement sensor, is coupled directly to the magnet armature 6.
  • the relative movement of the contacts 18 is detected indirectly and evaluated in an evaluation device 25.
  • the time t k is determined from the change of the acceleration b or the collapse of the speed v.
  • the remaining distance d (through-pressure) or the distance s traveled up to this time t k can be taken directly from the path-time curve w (t) of the actuator (armature 6).
  • the evaluation device 25 can also take over the differentiation or integration of the movement signal generated by the sensor 22.
  • a sensor 24 may be disposed on the movable contact bridge 14.
  • the distances So or Si can be measured directly.
  • the speed v can be determined directly as a function of time.
  • the closing time t k is the time at which the movement ends and the speed v of the movable contact 18 becomes zero.
  • the sensors 22, 24 are mechanically coupled to the moving parts-armature 6 or movable contact 18. In principle, however, it is also possible to use contactless sensors which measure the distance between the levanten moving part to a fixed housing part.
  • the distance di of the pole faces of magnet yoke and armature can also be calculated from the path Si. This then results from the difference between the stored value H for the distance of the surfaces in the opened state and the traveled distance
  • D 0 -Di (do-di) / 2. If the distance di is measured directly as the distance traveled by the actuator (armature) from the time t k to its final position, the burnup Do-Di can be directly calculated with the above equation, if the distance do (through-pressure) for unconsumed contacts is stored as a reference value.

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

Pour la détermination de l'usure de contacts d'un commutateur électromagnétique, une grandeur mécanique (v) caractérisant le profil temporel du mouvement relatif entre les contacts, provoqué par un actionneur, est mesurée lors de la mise en marche. L'évaluation du profil temporel du mouvement relatif permet de déterminer l'instant (t<SUB>k</SUB>) auquel les contacts (18) se ferment, et la distance (s ou d) parcourue par le ou les contacts (18) jusqu'à cet instant (t<SUB>k</SUB>) ou la distance parcourue par l'actionneur jusqu'à sa position finale à partir de cet instant (t<SUB>k</SUB>) est mesurée au moins indirectement et comparée à une valeur de référence enregistrée.
EP20060793351 2005-09-21 2006-09-08 Procede de determination de l'usure de contacts d'un commutateur electromagnetique et commutateur electromagnetique comportant un dispositif fonctionnant selon ce procede Not-in-force EP1927121B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005045095A DE102005045095A1 (de) 2005-09-21 2005-09-21 Verfahren zum Bestimmen des Abbrandes von Kontakten eines elektromagnetischen Schaltgerätes und elektromagnetisches Schaltgerät mit einer nach diesem Verfahren arbeitenden Einrichtung
PCT/EP2006/066166 WO2007033913A1 (fr) 2005-09-21 2006-09-08 Procede de determination de l'usure de contacts d'un commutateur electromagnetique et commutateur electromagnetique comportant un dispositif fonctionnant selon ce procede

Publications (2)

Publication Number Publication Date
EP1927121A1 true EP1927121A1 (fr) 2008-06-04
EP1927121B1 EP1927121B1 (fr) 2015-05-20

Family

ID=37398977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060793351 Not-in-force EP1927121B1 (fr) 2005-09-21 2006-09-08 Procede de determination de l'usure de contacts d'un commutateur electromagnetique et commutateur electromagnetique comportant un dispositif fonctionnant selon ce procede

Country Status (6)

Country Link
US (1) US8688391B2 (fr)
EP (1) EP1927121B1 (fr)
KR (1) KR101360754B1 (fr)
CN (1) CN101305433B (fr)
DE (1) DE102005045095A1 (fr)
WO (1) WO2007033913A1 (fr)

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DE102008046374B3 (de) * 2008-09-09 2009-12-31 Siemens Aktiengesellschaft Schaltgerät
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FR2945661A1 (fr) 2009-05-18 2010-11-19 Schneider Electric Ind Sas Evaluation de l'usure de contacts enfonces par la variation de la rotation de l'arbre des poles
EP2290666B1 (fr) * 2009-08-27 2015-08-12 Siemens Aktiengesellschaft Module auxiliaire pour appareil de surveillance de durée de vie pour commutateurs électromagnétiques et procédé correspondant
FR2952222B1 (fr) * 2009-11-05 2014-01-03 Schneider Electric Ind Sas Dispositif de determination de l'usure des contacts d'appareils de commutation electrique
DE102010043744A1 (de) * 2010-11-11 2012-05-16 Continental Automotive Gmbh Schaltungsanordnung sowie Verfahren zur Überwachung des Schaltens einer Energiequelle zur Versorgung eines Elektroantriebs
FR2981787B1 (fr) * 2011-10-21 2014-08-01 Schneider Electric Ind Sas Procede de diagnostic d'un etat de fonctionnement d'un contacteur et contacteur pour la mise en oeuvre dudit procede
US20140210575A1 (en) * 2013-01-28 2014-07-31 James J. Kinsella Electrically operated branch circuit protector
FR3011673B1 (fr) * 2013-10-08 2015-12-11 Schneider Electric Ind Sas Dispositif de commutation et procede de detection d'un defaut d'un tel dispositif de commutation
DE102013114073B3 (de) * 2013-12-16 2015-06-18 Eaton Electrical Ip Gmbh & Co. Kg Hilfsschalter für ein Schaltgerät
DE102013114305B4 (de) * 2013-12-18 2019-11-21 Eaton Intelligent Power Limited Elektrisches Schaltgerät
EP3142136B1 (fr) * 2015-09-11 2018-07-18 Sick Ag Dispositif de commande d'un element de commutation
CN105651503B (zh) * 2016-01-07 2017-07-18 广东电网有限责任公司电力科学研究院 一种基于加速度变量监测的断路器机械故障诊断方法
DE102017202882A1 (de) 2017-02-22 2018-08-23 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren und Vorrichtung zur Überwachung mindestens eines Relais
WO2018224155A1 (fr) * 2017-06-08 2018-12-13 Abb Schweiz Ag Dispositif de surveillance pour systèmes de commutation
FR3069064B1 (fr) * 2017-07-13 2022-02-11 Schneider Electric Ind Sas Dispositif de commutation electrique et procede de detection d'usure associe
CN107562112B (zh) * 2017-10-17 2024-01-12 国网山东省电力公司龙口市供电公司 一种电路低电压调节器
JP7156050B2 (ja) * 2019-01-18 2022-10-19 オムロン株式会社 リレー
FR3112649B1 (fr) * 2020-07-20 2023-05-12 Schneider Electric Ind Sas Procédé de diagnostic d’un état de fonctionnement d’un appareil de commutation électrique et appareil de commutation électrique pour la mise en œuvre d’un tel procédé
FR3112650B1 (fr) * 2020-07-20 2023-05-12 Schneider Electric Ind Sas Procédé de diagnostic d’un état de fonctionnement d’un appareil de commutation électrique et appareil de commutation électrique pour la mise en œuvre d’un tel procédé
FR3125655A1 (fr) * 2021-07-23 2023-01-27 Schneider Electric Industries Sas Dispositif de coupure d’un circuit électrique de moyenne tension
US11967470B2 (en) 2021-09-02 2024-04-23 Rockwell Automation Technologies, Inc. Method and device for determining contact thickness change of a contactor
CN113848047B (zh) * 2021-09-28 2024-05-28 江苏大烨智能电气股份有限公司 一种直动测量断路器开距超程的结构及方法
JP2023061690A (ja) * 2021-10-20 2023-05-02 オムロン株式会社 電磁継電器

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Also Published As

Publication number Publication date
US20090144019A1 (en) 2009-06-04
CN101305433A (zh) 2008-11-12
WO2007033913A1 (fr) 2007-03-29
CN101305433B (zh) 2012-08-08
EP1927121B1 (fr) 2015-05-20
US8688391B2 (en) 2014-04-01
KR20080058365A (ko) 2008-06-25
DE102005045095A1 (de) 2007-04-05
KR101360754B1 (ko) 2014-02-07

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