EP3511969B1 - Contactor device - Google Patents
Contactor device Download PDFInfo
- Publication number
- EP3511969B1 EP3511969B1 EP18151977.8A EP18151977A EP3511969B1 EP 3511969 B1 EP3511969 B1 EP 3511969B1 EP 18151977 A EP18151977 A EP 18151977A EP 3511969 B1 EP3511969 B1 EP 3511969B1
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- EP
- European Patent Office
- Prior art keywords
- moving mechanism
- contactor device
- lever
- casing
- fixed 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.)
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Images
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.
- WO 98/40898 A2 discloses a two pole contactor comprising a solenoid with a plunger actuator and a movable contact.
- the plunger forms a part of an electric circuit when the contactor is in the closed position.
- the contactor device according to the present invention comprises:
- 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, and an actuator is arranged between said moving mechanism and said indicator means to receive an action of said moving mechanism and to act on a button of said indicator means when receiving the action of said moving mechanism, wherein said actuator is preferably biased to a position not acting on said button of said indicator means.
- 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.
- 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.
- 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.
- 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 electromagnetic driving means 15.
- the driving means 15 has a magnetic coil 17 accomodated in a squared coil housing 18.
- 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 biasing 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 biasing 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 corresponding arc chute type and energy capacity that shall be extinguished in total security.
- 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 applications according to IEC 60077 standard.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
- The present invention relates to a contactor device, in particular to a contactor device for industrial or railway applications.
- As it is well known in the art, 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. Apart from optional auxiliary low current contacts, the contactors are almost exclusively fitted with normally open ("form A") contact elements. When current passes through the magnetic coil, 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. When the magnetic coil is de-energized, gravity or a spring returns the moving core back to its initial position, resulting in opening the contacts of the contact elements.
- In addition, many contactor devices include an indicator means in the form of an 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.
-
WO 98/40898 A2 - It is the object of the present invention to provide a contactor device having an improved mechanism acting on the indicator means to reduce malfunction situations and extend the working life of the contactor device.
- According to the present invention, this object is achieved by a contactor device cited in
claim 1. Advantageous configurations and further developments of the invention are defined in the dependant claims. - The contactor device according to the present invention comprises:
- a 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;
- a driving means for activating the moving mechanism; and
- an indicator means for indicating a connecting status of the first and second fixed contact elements.
- According to the present invention, 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, and an actuator is arranged between said moving mechanism and said indicator means to receive an action of said moving mechanism and to act on a button of said indicator means when receiving the action of said moving mechanism, wherein said actuator is preferably biased to a position not acting on said button of said indicator means.
- In other words, the same moving mechanism for moving the movable contact element is also used to act on the indicator means. Thus, an additional lever for acting on the indicator means is omitted. As a result, 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.
- Preferably, the first and second terminals project from the same lateral side of the casing of the contactor device.
- In a preferred configuration of the invention, 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. In this configuration, 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.
- In this configuration, 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. In this case, 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.
- In a preferred configuration of the invention, the driving means comprises a slider and the moving mechanism is coupled to this slider via a connecting element. Preferably, this connecting element is hingedly connected to the moving mechanism at one side and is hingedly connected to the slider at the other side. In this case, 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. Preferably, this connecting pin is positioned in proximity of the supporting pin of the lever of the moving mechanism.
- In a preferred configuration of the invention, 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.
- To reduce the manufacturing costs, 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.
- In another preferred configuration of the invention, the contactor device further comprises an arc elimination means covering the fixed and movable contacts.
- Preferably, 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. Preferably, the dissipation plates are made of ceramic.
- Preferably, the dissipation plates are arranged in a staggered manner in the arc eliminator housing portion of said casing. In addition or alternatively, 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.
- In a preferred configuration of the invention, the casing is assembled from two casing shells to define housing portions for the various components of the contactor device therebetween.
- Preferably, a half base flange is formed integrally with each casing shell so that the base flange is obtained once the casing shells are assembled.
- Preferably, the casing or its casing shells, respectively, are made of a synthetic plastic material having a predetermined isolation coefficient.
- Above and other features and advantages of the present invention will be better understood from the following specific description of an exemplary, non-limiting embodiment with reference to the accompanying drawings. In the drawings, partially schematically:
- 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 removed; - 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 device of
Fig. 1 with the casing removed; - Fig. 5
- is a further perspective side view of the various components of the conductor device of
Fig. 1 with the casing removed, from the opposite side compared toFig. 4 ; and - Fig. 6
- is a still further perspective side view of the various components of the conductor device of
Fig. 1 with the casing removed, from the same side as inFig. 4 . -
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, thecontactor 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 acasing 2 accomodating and protecting all the various components of thecontactor device 1 as will be described hereinafter. Thecasing 2 is made by a synthetic plastic material having a predetermined isolation coefficient. Thecasing 2 is formed by a pair of mouldedcasing shells contactor device 1. More particularly, the assembledcasing 2 provides a centralcontact housing portion 4, a lowerdriver housing portion 5, a lowerindicator housing portion 6, and an upper arc eliminatorhousing portion 7. - As indicated in
Figs. 1 to 3 , thecasing 2 has a half base flange formed integrally with eachcasing shell base flange 3 is obtained once thecasing shells base flange 3 serves for installing thecontactor device 1 e.g. on a supporting wall that may be vertical or horizontal depending on the application needs. - In the central
contact housing portion 4, thecontactor device 1 comprises a first fixedcontact element 8 connected to a first terminal (e.g. positive pole) of thecontactor device 1, a second fixedcontact element 10 connected to a second terminal (e.g. negative pole) of thecontactor device 1, and amovable contact element 11. In this embodiment, the lower end of themovable contact element 11 is electrically connected to the second fixedcontact element 10 via a conventional braid (not shown in the figures), the first fixedcontact element 8 comprises a fixedcontact 9, and themovable contact element 11 comprises amovable contact 12. Themovable contact element 11 can be moved in a way to move themovable contact 12 into contact to the fixedcontact 9 to electrically connect the two fixedcontact elements contact 9 to electrically separate the two fixedcontact elements terminals contactor device 1 are provided on the same lateral side of thecasing 2. - In the upper arc
eliminator hosing portion 7, thecontactor device 1 is provided with an arc elimination means 32 covering the fixed andmovable contacts movable contact elements dissipation plates 38, 38' (described later on in more detail), a firstpolar element 33 having anarc contact 34, a secondpolar element 36, and a furthermovable contact 35 provided on themovable contact element 11. The fixedcontact 9 of the first fixedcontact element 8 may be made by a silver alloy, while thearc contact 34 of the firstpolar element 34 may be made by a tungsten alloy having higher resistive characteristics. - A
conventional blowing coil 40 is provided between the first fixedcontact element 8 and the firstpolar element 33. This blowingcoil 40 is used at the opening phase of thecontactor device 1 to facilitate the dissipation of the electric field energy of thepositive pole 13 toward the arc elimination means 32 to reduce the possible electric arc. - In the lower
driver housing portion 4, thecontactor device 1 comprises an electromagnetic driving means 15. The driving means 15 has amagnetic coil 17 accomodated in asquared coil housing 18. Themagnetic coil 17 may be realized with a variable number of windings depending on the voltage value under which thecoil 17 shall operate. The windings may be formed around a cylindrical core of a conventional sprocket. - Independently from the number of windings, the
coil housing 18 is provided with a metal case having a squared section in which the sprocket is accomodated. Thus, the squaredcoil housing 18 may accomodate any kind ofmagnetic coil 17 needed for the specific application of thecontactor device 1. - The driving means 16 has a
coil slider 19 projecting outside themagnetic coil 17 and thecoil housing 18. Thiscoil slider 19 is pushed by electromagnetic force generated by themagnetic coil 17 against the biasing force of aspring 21 that is mounted on an opposite end of thecoil slider 19 projecting from the opposite side of themagnetic coil 17. - The
coil slider 19 is coupled to a movingmechanism 15, via a connectingelement 20. The movingmechanism 15 comprises alever 22 which is hingedly supported in thecasing 2, via a supportingarm 25 being transversely fixed in thecasing 2. Thelever 22 has afirst arm 23 extending upwardly for supporting themovable contact element 11, and asecond arm 24 extending downwardly for connection to the connectingelement 20. - The connecting
element 20 is hingedly connected to the end of thecoil slider 19 at its one side, and hingedly connected to thesecond arm 24 of thelever 22 at its other side, via a connectingpin 26. The connectingpin 26 is preferably positioned in the proximity of the supportingpin 25 of thelever 22. - When the
coil slider 19 of the driving means 16 is pushed by electromagnetic force generated by themagnetic coil 17, thelever 22 of the movingmechanism 15 is rotated via the connectingelement 20. Due to this rotation of thelever 22, themovable contact element 11 is moved in a direction towards the first fixedcontact element 8 so that themovable contact 12 comes into contact with the fixedcontact 9. When the generation of the electromagnetic force by themagnetic coil 17 ends, thecoil slider 19 is pulled back by the biasing force of thespring 21. As a result, thelever 22 of the movingmechanism 15 is returned via the connectingelement 20 so that themovable contact element 11 is moved in a direction away from the first fixedcontact element 8 to separate themovable contact 12 from the fixedcontact 9. - In the
indicator housing portion 6, thecontactor device 1 comprises an indicator means 27 being configured as an auxiliary switch. Thisauxiliary switch 27 may be a single-pole or a dual-pole switch. - Advantageously, an
intermediate tilting actuator 28 is arranged between theauxiliary switch 27 and the movingmechanism 15 for acting on theauxiliary switch 27 when the movingmechanism 15 is activated by thecoil slider 19 of the driving means 16. Thisactuator 28 comprises at least one lever having one end hinged to a fixed supportingpoint 29 of thecasing 2. The lever of the tiltingactuator 28 extends downwardly in a cantilever manner and is kept at a predetermined distance from theauxiliary switch 27 by the biasing force of aspring 39. - More specifically, the lever of the
actuator 28 is intended to act on abutton 41 of theauxiliary switch 27 against the biasing force of thespring 39 when the lever is pushed towards theauxiliary switch 27 by the combined action of thecoil slider 19 and thesecond arm 24 of the movingmechanism 15. In case of a dual-poleauxiliary switch 27, theactuator 28 has two levers in a parallel configuration for acting on twobuttons 41 of theauxiliary switch 27. - Further, the lower end of the lever of the
actuator 28 is provided with a smallresilient wheel 30 for reducing the impact of thesecond arm 24 of the movingmechanism 15 when it is pushed towards the free end of the actuator's lever. In addition, the side portion of thesecond arm 24 of thelever 22 of the movingmechanism 15 facing towards theactuator 28 may be shaped with acircular recess 31 mating with theresilient wheel 30 for rendering even smoother the impact between the side portion of thesecond arm 24 andresilient wheel 30 of the actuator's lever, in consideration of the high number of switching actions performed by thecontactor device 1. - Now, the above-mentioned arc elimination means 32 is explained in more detail.
- As a matter of fact, without adequate contact protection, the occurrence of electric current arcing causes significant degradation of the
contacts contacts - The arc elimination means 32 provided in the
contactor device 1 of the present invention is structured with a plurality ofparallel dissipation plates 38, 38' supported in a half cover formed in eachcasing shell casing 2. In contrast to prior art solutions where a single ceramic element is inserted in the cover of the arc elimination means, in the present invention a plurality of slots are formed in the upper arc eliminatorhousing portion 7 of eachhalf shell casing 2. Adissipation plate 38, 38' is accomodated in each facing slot. Thedissipation plates 38, 38'are preferably formed by ceramic but even other material may be used. - Preferably, the
dissipation plates 38, 38' are arranged in a staggered manner so that each odd-numbereddissipation plate 38 has an adjacent even-numbered dissipation plate 38' that is shifted along the vertical direction. In addition or as an alternative, the odd-numbereddissipation 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 corresponding arc chute type and energy capacity that shall be extinguished in total security. The creepage and clearance distances between thedissipation 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 movingmechanism 15 provided also for acting on theauxiliary switch 27 has a stronger and more reliable structure if compared with known solutions. The direct or indirect blow out circuit makes thecontactor device 1 suitable to work both with high and low currents. Preferably, thecontactor device 1 of the present invention is further designed for on-board applications according to IEC 60077 standard. -
- 1
- contactor device
- 2
- casing
- 2A, 2B
- casing shells
- 3
- base flange
- 4
- contact housing portion
- 5
- driver housing portion
- 6
- indicator housing portion
- 7
- arc eliminator housing portion
- 8
- first fixed contact element
- 9
- fixed contact
- 10
- second fixed contact element
- 11
- movable contact element
- 12
- movable contact
- 13
- first terminal
- 14
- second terminal
- 15
- moving mechanism
- 16
- driving means, esp. electromagnetic driving means
- 17
- magnetic coil
- 18
- coil housing
- 19
- coil slider
- 20
- connecting element
- 21
- spring
- 22
- lever
- 23
- first arm
- 24
- second arm
- 25
- supporting pin
- 26
- connecting pin
- 27
- indicator means, exp. auxiliary switch
- 28
- actuator, esp. lever
- 29
- supporting point
- 30
- resilient wheel
- 31
- recess
- 32
- arc elimination means
- 33
- first polar element
- 34
- arc contact
- 35
- further movable contact
- 36
- second polar element
- 38, 38'
- dissipation plates
- 39
- spring
- 40
- blowing coil
- 41
- button
Claims (12)
- A contactor device (1), comprising:a first fixed contact element (8) connected to a first terminal (13) of the contactor device (1) and a second fixed contact element (10) connected to a second terminal (14) of the contactor device (1), the pair of fixed contact elements (8, 10) having at least one fixed contact (9);a movable contact element (11) having at least one movable contact (12);a casing (2) for supporting and protecting said fixed and movable contact elements (8, 10, 11);a moving mechanism (15) for moving said movable contact element (11) to move said at least one movable contact (12) into contact to said at least one fixed contact (9) to electrically connect said first and second fixed contact elements (8, 10) to one another or apart from said at least one fixed contact (9) to electrically separate said first and second fixed contact elements (8, 10) from one another;a driving means (16) for activating said moving mechanism (15); andan indicator means (27) for indicating a connecting status of said first and second fixed contact elements (8, 10),characterized in thatsaid moving mechanism (15) is arranged and configured such that it is acting on said indicator means (27) when it is activated by said driving means (16) to move said movable contact element (11) to move said at least one movable contact (12) into contact to said at least one fixed contact (9), andwherein an actuator (28) is arranged between said moving mechanism (15) and said indicator means (27) to receive an action of said moving mechanism (15) and to act on a button (41) of said indicator means (27) when receiving the action of said moving mechanism (15), wherein said actuator (28) is preferably biased to a position not acting on said button (41) of said indicator means (27).
- The contactor device according to claim 1, wherein
said moving mechanism (15) comprises a lever (22) hingedly supported in said casing (2) by a supporting pin (25), wherein said lever (22) has a first arm (23) supporting said movable contact element (11) and a second arm (24) coupled to said driving means (16), and
said second arm (24) of said lever (22) is acting on said indicator means (27) when said moving mechanism (15) is activated by said driving means (16) to move said movable contact element (11) to move said at least one movable contact (12) into contact to said at least one fixed contact (9). - The contactor device according to claim 1 or 2, wherein
said actuator (28) comprises at least one lever being hingedly supported in said casing (2) and a resilient wheel (30) arranged on said lever at a position to come into contact with said moving mechanism (15) when receiving the action of said moving mechanism (15). - The contactor device according to claims 2 and 3, wherein
said second arm (24) of said lever (22) of said moving mechanism (15), on its side facing said actuator (28), is provided with a recess (31) mating with said resilient wheel (30) of said lever of said actuator (28). - The contactor device according to any one of preceding claims, wherein
said driving means (16) comprises a slider (19) and said moving mechanism (15) is coupled to said slider (19) via a connecting element (20), wherein said connecting element (20) is hingedly connected to said moving mechanism (15) at one side and is hingedly connected to said slider (19) at the other side. - The contactor device according to claims 2 and 5, wherein
said one side of said slider (19) is hingedly connected to said second arm (24) of said lever (22) of said moving mechanism (15) by a connecting pin (26), wherein said connecting pin (26) is positioned in proximity of said supporting pin (25) of said lever (22) of said moving mechanism (15). - The contactor device according to any one of preceding claims, wherein
said driving means (16) comprises a magnetic coil (18), wherein a number of windings of said magnetic coil (18) is variably determined according to a desired voltage operating said driving means (16). - The contactor device according to any one of preceding claims, wherein
it further comprises an arc elimination means (32) covering said fixed and movable contacts (9, 12). - The contactor device according to claim 8, wherein
said arc elimination means (32) comprises a plurality of dissipation plates (38, 38') arranged in parallel to each other in slots formed in an arc eliminator housing portion (7) of said casing (2). - The contactor device according to claim 9, wherein
said dissipation plates (38, 38') are arranged in a staggered manner in said arc eliminator housing portion (7) of said casing (2). - The contactor device according to claim 9 or 10, wherein
said plurality of dissipation plates (38, 38') comprises a plurality of odd-numbered dissipation plates (38) and a plurality of even-numbered dissipation plates (38') being alternately arranged in said arc eliminator housing portion (7) of said casing (2), wherein said odd-numbered dissipation plates (38) each have a first shape and said even-numbered dissipation plates (38') each have a second shape, said second shape being different from said first shape. - The contactor device according to any one of preceding claims, wherein
said casing (2) is assembled from two casing shells (2A, 2B) to define housing portions (4, 5, 6, 7) for the various components of the contactor device (1) therebetween.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18151977.8A EP3511969B1 (en) | 2018-01-16 | 2018-01-16 | Contactor device |
ES18151977T ES2829373T3 (en) | 2018-01-16 | 2018-01-16 | Contactor device |
CN201980008631.9A CN111801762B (en) | 2018-01-16 | 2019-01-14 | Contactor device |
PCT/EP2019/050748 WO2019141611A1 (en) | 2018-01-16 | 2019-01-14 | Contactor device |
RU2020127198A RU2742946C1 (en) | 2018-01-16 | 2019-01-14 | Contactor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18151977.8A EP3511969B1 (en) | 2018-01-16 | 2018-01-16 | Contactor device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3511969A1 EP3511969A1 (en) | 2019-07-17 |
EP3511969B1 true EP3511969B1 (en) | 2020-08-05 |
Family
ID=60997396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18151977.8A Active EP3511969B1 (en) | 2018-01-16 | 2018-01-16 | Contactor device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3511969B1 (en) |
CN (1) | CN111801762B (en) |
ES (1) | ES2829373T3 (en) |
RU (1) | RU2742946C1 (en) |
WO (1) | WO2019141611A1 (en) |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU152495A1 (en) * | 1962-01-18 | 1963-02-12 | ||
US3916133A (en) * | 1974-04-22 | 1975-10-28 | Allen Bradley Co | Optical indicator for enclosed operating mechanism |
SU1020882A1 (en) * | 1981-10-06 | 1983-05-30 | Ленинградское Производственное Электромашиностроительное Объединение "Электросила" Им.С.М.Кирова | Impact and vibration-proof contactor |
DE19602118C2 (en) * | 1996-01-22 | 1999-12-30 | Siemens Ag | Electrical switching device |
DE19882165T1 (en) * | 1997-03-08 | 2000-03-30 | Blp Components Ltd | Two-pole contactor |
US6538870B2 (en) * | 2001-02-02 | 2003-03-25 | Eaton Corporation | Circuit breaker and electrical distribution panel employing the same |
EP1253612A3 (en) * | 2001-04-26 | 2005-04-20 | Tyco Electronics AMP GmbH | Switch relay with switching status display |
CN2539272Y (en) * | 2002-01-04 | 2003-03-05 | 车小敏 | Auto-controlled ac contactor |
AU2003294658A1 (en) * | 2003-12-15 | 2005-07-05 | Siemens Aktiengesellschaft | Electromagnetic switching device |
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 (en) * | 2007-07-12 | 2008-12-31 | 엘에스산전 주식회사 | Air circuit breaker with mechanical trip indicating mechanism |
KR100876535B1 (en) * | 2007-08-20 | 2008-12-31 | 엘에스산전 주식회사 | Apparatus for auxiliary contact of circuit braker |
UA93455C2 (en) * | 2009-10-26 | 2011-02-10 | Государственное Предприятие Завод «Электротяжмаш» | Contactor for transport vehicle control |
FI123561B (en) * | 2011-06-07 | 2013-07-15 | Abb Oy | Switch |
KR101622188B1 (en) * | 2014-09-26 | 2016-05-18 | 엘에스산전 주식회사 | Auxiliary Contactor of Electgromagnetic Contactor |
DE102015000796B4 (en) * | 2015-01-22 | 2017-03-02 | Schaltbau Gmbh | Switching device with permanent magnetic arc extinguishing |
CN106252164A (en) * | 2016-08-31 | 2016-12-21 | 贵州天义电器有限责任公司 | A kind of track traffic high-voltage DC contactor |
PL3293748T3 (en) * | 2016-09-09 | 2020-11-16 | Microelettrica Scientifica S.P.A. | Improved contactor device for high current switching applications |
-
2018
- 2018-01-16 EP EP18151977.8A patent/EP3511969B1/en active Active
- 2018-01-16 ES ES18151977T patent/ES2829373T3/en active Active
-
2019
- 2019-01-14 CN CN201980008631.9A patent/CN111801762B/en active Active
- 2019-01-14 RU RU2020127198A patent/RU2742946C1/en active
- 2019-01-14 WO PCT/EP2019/050748 patent/WO2019141611A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP3511969A1 (en) | 2019-07-17 |
RU2742946C1 (en) | 2021-02-12 |
WO2019141611A1 (en) | 2019-07-25 |
ES2829373T3 (en) | 2021-05-31 |
CN111801762B (en) | 2022-08-23 |
CN111801762A (en) | 2020-10-20 |
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