WO2019141611A1 - Dispositif contacteur - Google Patents

Dispositif contacteur Download PDF

Info

Publication number
WO2019141611A1
WO2019141611A1 PCT/EP2019/050748 EP2019050748W WO2019141611A1 WO 2019141611 A1 WO2019141611 A1 WO 2019141611A1 EP 2019050748 W EP2019050748 W EP 2019050748W WO 2019141611 A1 WO2019141611 A1 WO 2019141611A1
Authority
WO
WIPO (PCT)
Prior art keywords
moving mechanism
contactor device
lever
casing
movable contact
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.)
Ceased
Application number
PCT/EP2019/050748
Other languages
English (en)
Inventor
Lorenzo Stendardi
Marco CORNA
Claudio Mondellini
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.)
Microelettrica Scientifica SpA
Original Assignee
Microelettrica Scientifica SpA
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 Microelettrica Scientifica SpA filed Critical Microelettrica Scientifica SpA
Priority to RU2020127198A priority Critical patent/RU2742946C1/ru
Priority to CN201980008631.9A priority patent/CN111801762B/zh
Publication of WO2019141611A1 publication Critical patent/WO2019141611A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/167—Circuits for remote indication

Definitions

  • the present invention relates to a contactor device, in particular to a contactor device for industrial or railway applications.
  • a contactor device is an electrically controlled switch used for switching an electrical power circuit.
  • Contactor devices are used to control e.g. electric motors, lighting, heating, capacitor banks, thermal evaporators, and other electrical loads.
  • a contactor may be considered similar to a relay except with higher current ratings and a few other differences. Unlike general-purpose relays, contactors are designed to be directly connected to high-current load devices. Relays tend to be of lower capacity and are usually designed for both normally closed and normally open applications only. Moreover, unlike relays, contactors usually are designed with means to control and suppress the arc produced when interrupting heavy motor currents. Generally speaking, devices switching more than 15 amperes or in circuits rated more than a few kilowatts are usually called contactors. A contactor is controlled by a circuit which has a much lower power level than the switched circuit. Unlike a circuit breaker, a contactor device is not intended to interrupt a short circuit current.
  • Contactors range from those having a breaking current of several amperes to thousands of amperes and 24 VDC to many kilovolts.
  • the physical size of contactors ranges from a device small enough to pick up with one hand, to large devices approximately a meter on a side.
  • a conventional contactor device has substantially three main components. At least two contact elements (at least one fixed contact element and at least one movable contact element) being the current carrying part of the contactor device, which may include power contacts, auxiliary contacts, and contact springs; an electromagnetic driving means providing the driving force to close the contacts; and a casing for housing the contact elements and the driving means. Casings are usually made of insulating materials like Bakelite, Nylon, and thermosetting plastics to protect and insulate the contact elements and to provide some measure of protection against personnel touching the contacts.
  • the driving means may be driven by either an AC or DC supply depending on the contactor design.
  • the magnetic coil of the driving means may be energized at the same voltage as a load the contactor is controlling, or may be separately controlled with a lower coil voltage.
  • the contactors are almost exclusively fitted with normally open ("form A") contact elements.
  • a magnetic field is produced attracting a moving core of the contactor.
  • the magnetic coil draws more current initially, until its inductance increases when the metal core enters the coil.
  • the movable contact element is moved by the moving core, the force developed by the magnetic coil holding the contacts of the fixed and movable contact elements together.
  • gravity or a spring returns the moving core back to its initial position, resulting in opening the contacts of the contact elements.
  • auxiliary switch which may be a single-pole or a double-pole switch.
  • This auxiliary switch may be used to remotely indicate the position of the main circuit contacts of the contact elements, whether open or closed.
  • Auxiliary switches can be used to operate e.g. indicator lights, relays or other accessories used for safety reasons.
  • a known solution for acting on the auxiliary swith provides a lever having one end linked to the casing of the contactor device and the opposite end free to move in a cantilever manner under the force of the moving core of the electromagnetic driving means.
  • Such a lever is used to physically act on the auxiliary switch button to activate the auxiliary switch.
  • the inventors of the present invention has noted that the efficiency of this lever mechanism acting on the auxiliary switch is very much reduced during the working life of the contactor device causing malfunctions and even faults.
  • the contactor device according to the present invention comprises:
  • first fixed contact element connected to a first terminal of the contactor device and a second fixed contact element connected to a second terminal of the contactor device, thise pair of fixed contact elements having at least one fixed contact;
  • a movable contact element having at least one movable contact
  • a casing for supporting and protecting the fixed and movable contact elements; a moving mechanism for moving the movable contact element to move the at least one movable contact into contact to the at least one fixed contact to electrically connect the first and second fixed contact elements to one another or apart from the at least one fixed contact to electrically separate the first and second fixed contact elements from one another;
  • an indicator means for indicating a connecting status of the first and second fixed contact elements.
  • the moving mechanism is arranged and configured such that it is acting on the indicator means when it is activated by the driving means to move the movable contact element to move the at least one movable contact into contact to the at least one fixed contact.
  • the same moving mechanism for moving the movable contact element is also used to act on the indicator means.
  • an additional lever for acting on the indicator means is omitted.
  • the contactor device has a more reliable mechanism acting on the indicator means, has a longer working life, can be produced with reduced overall cost, and can have a more compact structure.
  • the first and second terminals project from the same lateral side of the casing of the contactor device.
  • the moving mechanism comprises a lever hingedly supported in the casing by a supporting pin, wherein this lever has a first arm supporting the movable contact element and a second arm coupled to the driving means.
  • the second arm of the lever is acting on the indicator means when the moving mechanism is activated by the driving means to move the movable contact element to move the at least one movable contact into contact to the at least one fixed contact.
  • an actuator is arranged between the moving mechanism and the indicator means to receive an action of the moving mechanism and to act on a button of the indicator means when receiving the action of the moving mechanism.
  • this actuator is biassed to a position not acting on the button of the indicator means.
  • the actuator preferably comprises at least one lever being hingedly supported in the casing and a resilient wheel arranged on the lever at a position to come into contact with the moving mechanism when receiving the action of the moving mechanism.
  • the second arm of the lever of the moving mechanism on its side facing the actuator, may be provided with a recess mating with the resilient wheel of the lever of the actuator.
  • the driving means comprises a slider and the moving mechanism is coupled to this slider via a connecting element.
  • this connecting element is hingedly connected to the moving mechanism at one side and is hingedly connected to the slider at the other side.
  • the one side of the slider may be hingedly connected to the second arm of the lever of the moving mechanism by a connecting pin.
  • this connecting pin is positioned in proximity of the supporting pin of the lever of the moving mechanism.
  • the driving means comprises a magnetic coil, wherein a number of windings of this magnetic coil is variably determined according to a desired voltage operating the driving means.
  • a squared coil housing may be provided with a metal case having a squared section wherein a cylindrical core of a sprocket is accomodated. The variable number of windings of the magnetic coil is formed around this sprocket.
  • the contactor device further comprises an arc elimination means covering the fixed and movable contacts.
  • this arc elimination means comprises a plurality of dissipation plates arranged in parallel to each other in slots formed in an arc eliminator housing portion of the casing.
  • the dissipation plates are made of ceramic.
  • the dissipation plates are arranged in a staggered manner in the arc eliminator housing portion of said casing.
  • the plurality of dissipation plates comprises a plurality of odd-numbered dissipation plates and a plurality of even-numbered dissipation plates being alternately arranged in the arc eliminator housing portion of the casing, wherein said odd-numbered dissipation plates each have a first shape and the even-numbered dissipation plates each have a second shape, the second shape being (slightly) different from the first shape.
  • the casing is assembled from two casing shells to define housing portions for the various components of the contactor device therebetween.
  • a half base flange is formed integrally with each casing shell so that the base flange is obtained once the casing shells are assembled.
  • the casing or its casing shells, respectively are made of a synthetic plastic material having a predetermined isolation coefficient.
  • Fig. 1 is a perspective view of a conductor device according to an embodiment of the present invention
  • Fig. 2 is a side view of the conductor device of Fig. 1 with one casing shell
  • Fig. 3 is a perspective side view of the conductor device of Fig. 1 with one casing shell removed;
  • Fig. 4 is a perspective side view of the various components of the conductor
  • Fig. 5 is a further perspective side view of the various components of the
  • Fig. 6 is a still further perspective side view of the various components of the
  • Figs. 1 to 6 show in different views an exemplary embodiment of a contactor device of the present invention.
  • the various components of the contactor device are given the same reference signs in all figures.
  • the contactor device 1 is a switching device specifically provided for industrial or railway applications wherein a high AC or DC current must be switched on and off for high-frequency switching actions. More specifically, the contactor device 1 is intended for high voltage ratings applications in the electric traction and in particular for railway and underground systems. Just to give an idea of the working conditions and the range of current values involved for this kind of contactor device, it should be noted that these devices must be able to efficiently switch currents of at least 50 A under operating voltage ranges between 900 V and 1800 V. These operating ranges may even be applied to a single pole of the contactor device. In this respect, the contactor device 1 of the present embodiment is disclosed hereinafter with a single pole configuration with a single interruption in air, an electromagnetic control by full power coil and single state functioning.
  • the contactor device 1 has a casing 2 accomodating and protecting all the various components of the contactor device 1 as will be described hereinafter.
  • the casing 2 is made by a synthetic plastic material having a predetermined isolation coefficient.
  • the casing 2 is formed by a pair of moulded casing shells 2A and 2B which are connected together to define housing portions for the various components of the contactor device 1. More particularly, the assembled casing 2 provides a central contact housing portion 4, a lower driver housing portion 5, a lower indicator housing portion 6, and an upper arc eliminator housing portion 7.
  • the casing 2 has a half base flange formed integrally with each casing shell 2A, 2B so that the base flange 3 is obtained once the casing shells 2A, 2B are assembled together.
  • the base flange 3 serves for installing the contactor device 1 e.g. on a supporting wall that may be vertical or horizontal depending on the application needs.
  • the contactor device 1 comprises a first fixed contact element 8 connected to a first terminal (e.g. positive pole) of the contactor device 1 , a second fixed contact element 10 connected to a second terminal (e.g. negative pole) of the contactor device 1 , and a movable contact element 11.
  • the lower end of the movable contact element 11 is electrically connected to the second fixed contact element 10 via a conventional braid (not shown in the figures)
  • the first fixed contact element 8 comprises a fixed contact 9
  • the movable contact element 11 comprises a movable contact 12.
  • the movable contact element 11 can be moved in a way to move the movable contact 12 into contact to the fixed contact 9 to electrically connect the two fixed contact elements 8, 10 or apart from the fixed contact 9 to electrically separate the two fixed contact elements 8, 10.
  • the two terminals 13, 14 of the contactor device 1 are provided on the same lateral side of the casing 2.
  • the contactor device 1 is provided with an arc elimination means 32 covering the fixed and movable contacts 9, 12 of the fixed and movable contact elements 8, 11.
  • the arc elimination means 32 includes a plurality of dissipation plates 38, 38’ (described later on in more detail), a first polar element 33 having an arc contact 34, a second polar element 36, and a further movable contact 35 provided on the movable contact element 11.
  • the fixed contact 9 of the first fixed contact element 8 may be made by a silver alloy, while the arc contact 34 of the first polar element 34 may be made by a tungsten alloy having higher resistive characteristics.
  • a conventional blowing coil 40 is provided between the first fixed contact element 8 and the first polar element 33. This blowing coil 40 is used at the opening phase of the contactor device 1 to facilitate the dissipation of the electric field energy of the positive pole 13 toward the arc elimination means 32 to reduce the possible electric arc.
  • the contactor device 1 comprises an electro- magnetic driving means 15.
  • the driving means 15 has a magnetic coil 17
  • the magnetic coil 17 may be realized with a variable number of windings depending on the voltage value under which the coil 17 shall operate.
  • the windings may be formed around a cylindrical core of a conventional sprocket.
  • the coil housing 18 is provided with a metal case having a squared section in which the sprocket is accomodated.
  • the squared coil housing 18 may accomodate any kind of magnetic coil 17 needed for the specific application of the contactor device 1.
  • the driving means 16 has a coil slider 19 projecting outside the magnetic coil 17 and the coil housing 18. This coil slider 19 is pushed by electromagnetic force generated by the magnetic coil 17 against the biasing force of a spring 21 that is mounted on an opposite end of the coil slider 19 projecting from the opposite side of the magnetic coil 17.
  • the coil slider 19 is coupled to a moving mechanism 15, via a connecting element 20.
  • the moving mechanism 15 comprises a lever 22 which is hingedly supported in the casing 2, via a supporting arm 25 being transversely fixed in the casing 2.
  • the lever 22 has a first arm 23 extending upwardly for supporting the movable contact element 11 , and a second arm 24 extending downwardly for connection to the connecting element 20.
  • the connecting element 20 is hingedly connected to the end of the coil slider 19 at its one side, and hingedly connected to the second arm 24 of the lever 22 at its other side, via a connecting pin 26.
  • the connecting pin 26 is preferably positioned in the proximity of the supporting pin 25 of the lever 22.
  • the contactor device 1 comprises an indicator means 27 being configured as an auxiliary switch.
  • This auxiliary switch 27 may be a single-pole or a dual-pole switch.
  • an intermediate tilting actuator 28 is arranged between the auxiliary switch 27 and the moving mechanism 15 for acting on the auxiliary switch 27 when the moving mechanism 15 is activated by the coil slider 19 of the driving means 16.
  • This actuator 28 comprises at least one lever having one end hinged to a fixed supporting point 29 of the casing 2.
  • the lever of the tilting actuator 28 extends downwardly in a cantilever manner and is kept at a predetermined distance from the auxiliary switch 27 by the biassing force of a spring 39.
  • the lever of the actuator 28 is intended to act on a button 41 of the auxiliary switch 27 against the biassing force of the spring 39 when the lever is pushed towards the auxiliary switch 27 by the combined action of the coil slider 19 and the second arm 24 of the moving mechanism 15.
  • the actuator 28 has two levers in a parallel configuration for acting on two buttons 41 of the auxiliary switch 27.
  • the lower end of the lever of the actuator 28 is provided with a small resilient wheel 30 for reducing the impact of the second arm 24 of the moving mechanism 15 when it is pushed towards the free end of the actuator’s lever.
  • the side portion of the second arm 24 of the lever 22 of the moving mechanism 15 facing towards the actuator 28 may be shaped with a circular recess 31 mating with the resilient wheel 30 for rendering even smoother the impact between the side portion of the second arm 24 and resilient wheel 30 of the actuator’s lever, in consideration of the high number of switching actions performed by the contactor device 1.
  • the arc elimination means 32 provided in the contactor device 1 of the present invention is structured with a plurality of parallel dissipation plates 38, 38’ supported in a half cover formed in each casing shell 2A, 2B of the casing 2.
  • a plurality of slots are formed in the upper arc eliminator housing portion 7 of each half shell 2A, 2B of the casing 2.
  • a dissipation plate 38, 38' is accomodated in each facing slot.
  • the dissipation plates 38, 38’ are preferably formed by ceramic but even other material may be used.
  • the dissipation plates 38, 38’ are arranged in a staggered manner so that each odd-numbered dissipation plate 38 has an adjacent even-numbered dissipation plate 38' that is shifted along the vertical direction.
  • the odd-numbered dissipation plates 38 may have a slightly different shape if compared to the even-numbered dissipation plates 38'.
  • the arc elimination means 32 may be provided with a different number of plates 38, 38' depending on the different voltage ranges that must be treated and the
  • the creepage and clearance distances between the dissipation plates 38, 38' of the arc elimination means 32 may be widely dimensioned for safe application in polluted environments.
  • the contactor device 1 of the present invention solves the abobe-mentioned technical problem and achieves a number of advantages, the main of which is given by the improved reliability and longer working life.
  • the moving mechanism 15 provided also for acting on the auxiliary switch 27 has a stronger and more reliable structure if compared with known solutions.
  • the direct or indirect blow out circuit makes the contactor device 1 suitable to work both with high and low currents.
  • the contactor device 1 of the present invention is further designed for on-board

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

L'invention concerne un dispositif contacteur (1) pour des applications industrielles ou ferroviaires comprenant une paire d'éléments de contact (8, 10) connectés à une paire de bornes (13, 14) du dispositif contacteur (1) ayant au moins un contact fixe (9), un élément de contact mobile (11) ayant au moins un contact mobile (12), et un boîtier (2) pour supporter et protéger lesdits éléments de contact fixes et mobiles (8, 10, 11). Il comprend en outre un mécanisme de déplacement (15) pour déplacer l'élément de contact mobile (11) pour déplacer l'au moins un contact mobile (12) en contact avec l'au moins un contact fixe (9) pour connecter électriquement les premier et second éléments de contact fixes (8, 10) l'un par rapport à l'autre ou à distance de l'au moins un contact fixe (9) pour séparer électriquement les premier et second éléments de contact fixes l'un de l'autre, et un moyen d'entrainement (16) pour activer le mécanisme de déplacement (15). Le dispositif contacteur (1) comprend également un moyen indicateur (27) pour indiquer un état de connexion des premier et second éléments de contact fixes (8, 10), le mécanisme de déplacement (15) étant agencé et configuré de telle sorte qu'il agit sur le moyen indicateur (27) lorsqu'il est activé par les moyens d'entraînement (16) pour déplacer l'élément de contact mobile (11) pour déplacer l'au moins un contact mobile (12) en contact avec l'au moins un contact fixe (9).
PCT/EP2019/050748 2018-01-16 2019-01-14 Dispositif contacteur Ceased WO2019141611A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RU2020127198A RU2742946C1 (ru) 2018-01-16 2019-01-14 Контактор
CN201980008631.9A CN111801762B (zh) 2018-01-16 2019-01-14 接触器装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18151977.8 2018-01-16
EP18151977.8A EP3511969B1 (fr) 2018-01-16 2018-01-16 Dispositif de contact

Publications (1)

Publication Number Publication Date
WO2019141611A1 true WO2019141611A1 (fr) 2019-07-25

Family

ID=60997396

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/050748 Ceased WO2019141611A1 (fr) 2018-01-16 2019-01-14 Dispositif contacteur

Country Status (5)

Country Link
EP (1) EP3511969B1 (fr)
CN (1) CN111801762B (fr)
ES (1) ES2829373T3 (fr)
RU (1) RU2742946C1 (fr)
WO (1) WO2019141611A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998040898A2 (fr) * 1997-03-08 1998-09-17 Blp Components Limited Contacteur bipolaire
EP3048626A1 (fr) * 2015-01-22 2016-07-27 Schaltbau GmbH Appareil de commutation avec soufflage d'arc par aimant permanent
CN206379313U (zh) * 2016-09-09 2017-08-04 迈科伊莱翠卡赛提飞卡股份公司 接触器装置及包括该接触器装置的电力系统

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SU152495A1 (fr) * 1962-01-18 1963-02-12
US3916133A (en) * 1974-04-22 1975-10-28 Allen Bradley Co Optical indicator for enclosed operating mechanism
SU1020882A1 (ru) * 1981-10-06 1983-05-30 Ленинградское Производственное Электромашиностроительное Объединение "Электросила" Им.С.М.Кирова Ударовиброустойчивый контактор
DE19602118C2 (de) * 1996-01-22 1999-12-30 Siemens Ag Elektrisches Schaltgerät
US6538870B2 (en) * 2001-02-02 2003-03-25 Eaton Corporation Circuit breaker and electrical distribution panel employing the same
EP1253612A3 (fr) * 2001-04-26 2005-04-20 Tyco Electronics AMP GmbH Relais de commutation avec indicateur de position de commutation
CN2539272Y (zh) * 2002-01-04 2003-03-05 车小敏 自控交流接触器
WO2005059939A1 (fr) * 2003-12-15 2005-06-30 Siemens Aktiengesellschaft Appareil de coupure electromagnetique
US7061352B2 (en) * 2004-01-26 2006-06-13 Tzo-Ing Lin Noise-free low-power consumption wide voltage range DC and AC contactor and remote telephone control system using the same
KR100876408B1 (ko) * 2007-07-12 2008-12-31 엘에스산전 주식회사 기계적 트립 표시 기구를 갖는 기중 차단기
KR100876535B1 (ko) * 2007-08-20 2008-12-31 엘에스산전 주식회사 차단기의 보조접점장치
UA93455C2 (ru) * 2009-10-26 2011-02-10 Государственное Предприятие Завод «Электротяжмаш» Kohtaktop для управления транспортным средством
FI123561B (fi) * 2011-06-07 2013-07-15 Abb Oy Kytkin
KR101622188B1 (ko) * 2014-09-26 2016-05-18 엘에스산전 주식회사 전자접촉기의 보조 접점기구
CN106252164A (zh) * 2016-08-31 2016-12-21 贵州天义电器有限责任公司 一种轨道交通用高压直流接触器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998040898A2 (fr) * 1997-03-08 1998-09-17 Blp Components Limited Contacteur bipolaire
EP3048626A1 (fr) * 2015-01-22 2016-07-27 Schaltbau GmbH Appareil de commutation avec soufflage d'arc par aimant permanent
CN206379313U (zh) * 2016-09-09 2017-08-04 迈科伊莱翠卡赛提飞卡股份公司 接触器装置及包括该接触器装置的电力系统
EP3293748A1 (fr) * 2016-09-09 2018-03-14 Microelettrica Scientifica S.p.A. Dispositif contacteur amélioré pour applications de commutation de courant élevé

Also Published As

Publication number Publication date
RU2742946C1 (ru) 2021-02-12
CN111801762B (zh) 2022-08-23
CN111801762A (zh) 2020-10-20
ES2829373T3 (es) 2021-05-31
EP3511969B1 (fr) 2020-08-05
EP3511969A1 (fr) 2019-07-17

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