EP2693456B1 - Actionneur à bobine pour dispositif de commutation et procédé de correction correspondant - Google Patents

Actionneur à bobine pour dispositif de commutation et procédé de correction correspondant Download PDF

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Publication number
EP2693456B1
EP2693456B1 EP12178942.4A EP12178942A EP2693456B1 EP 2693456 B1 EP2693456 B1 EP 2693456B1 EP 12178942 A EP12178942 A EP 12178942A EP 2693456 B1 EP2693456 B1 EP 2693456B1
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EP
European Patent Office
Prior art keywords
switching device
actuation
time
operation time
correction
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.)
Not-in-force
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EP12178942.4A
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German (de)
English (en)
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EP2693456A1 (fr
Inventor
Andrea Bianco
Gabriele Valentino De Natale
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.)
ABB Technology AG
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ABB Technology AG
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Priority to EP12178942.4A priority Critical patent/EP2693456B1/fr
Priority to PCT/EP2013/064194 priority patent/WO2014019798A1/fr
Publication of EP2693456A1 publication Critical patent/EP2693456A1/fr
Application granted granted Critical
Publication of EP2693456B1 publication Critical patent/EP2693456B1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H2047/009—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current with self learning features, e.g. measuring the attracting current for a relay and memorising it

Definitions

  • the present invention relates to a coil actuator for a switching device and to a related method for correcting operation times which are counted by the coil actuator and which are associated to actuations of a switching device, actuations caused by the coil actuator itself.
  • switching devices used in electrical circuits such as in low or medium voltage electric circuits, typically circuit breakers, disconnectors and contactors, are devices designed to allow the correct operation of specific parts of the electric circuits in which they are installed, and of the associated electric loads.
  • low voltage is referred to applications with operating voltages up to 1000V AC/1500V DC
  • medium voltage is referred to applications in the range from 1 kV to some tens of kV, e.g. 50 kV.
  • Switching devices can be actuated during their operation from an open position to a closed position so as to allow a current flowing therethrough, and from the closed position to the open position so as to interrupt such current flowing.
  • the switching devices comprise one or more electrical poles, or phases, each having at least a contact movable between a first position, or coupled position, in which it is coupled to a corresponding fixed contact (switching device in the closed position), and a second position, or separated position, in which it is spaced away from the corresponding fixed contact (switching device in the open position).
  • a suitable operating mechanism is operatively associated to the movable contacts so as to cause the displacement of such movable contacts between the coupled and separated positions.
  • Coil-based actuators are frequently used in switching devices, for example in mechanical operated switching devices for low or medium voltage circuits; mechanically operated switching have an operating mechanism of the known "stored-energy” type, wherein the energy required for opening the switching device is stored in suitable elastic means, such as springs.
  • a typical use of a coil actuator is to release mechanical parts of the associated switching device, e.g. corresponding parts of the operating mechanism, so as to open or close the switching device itself, following an opening or a closure command and/or event.
  • Examples of such coil actuators are opening shunt releases, closure shunt releases or undervoltage shunt releases, which are all devices well known in the art.
  • Document WO2009/135519 discloses a device according to the preamble of claim 1 and a method according to the preamble of claim 10.
  • an operation time associated to opening and/or closure actuation of the switching device is measured for various tasks, e.g. to implement a diagnostic function about the reliability of the switching device.
  • Each measured operation time comprises the activation time of the coil actuator and the time required by the operating mechanism to cause the actuation of the switching device upon the interaction with the coil actuator.
  • the counted operation times associated to the actuations of such sequence are distributed around a desired target operation time for the switching device, generally following a Gaussian statistical distribution.
  • this undesired effect is mainly due to the dependence of the operation time to be measured to the time required by the operating mechanism to cause the actuation of the switching device.
  • such required time can widely vary due for instance to production variances, as well as other variables influencing the performance of the operating mechanism, such as degradation of mechanical parts or the environment temperature.
  • the variance of the measured operation times with respect to the target value is generally not negligible in view for example of the diagnostic functionality and a correct operating of the switching device.
  • a coil actuator for an electric switching device which can be actuated during its operation from an open position to a closed position so as to allow a current flowing therethrough and from said closed position to said open position so as to interrupt such current flowing, said coil actuator being adapted to cause actuations of said switching device, each of said actuations having an operation time associated thereto and said operation time comprising a configurable delay time.
  • the coil actuator comprises electronic means arranged to:
  • Such desire is also fulfilled by a method for correcting operation times counted by a coil actuator and associated to actuations of a switching device which are caused by said coil actuator, wherein each of said operation times comprises a configurable delay time.
  • the method comprises:
  • Another aspect of the present disclosure is to provide a switching device comprising at least a coil actuator such as the coil actuator defined by the annexed claims and disclosed in the following description; another aspect is to provide a switchgear comprising at least a switching device and/or at least a coil actuator according to the annexed claims and disclosed in the following description.
  • a coil actuator 1 is adapted to be installed in a switching device 100, such as for example a low or medium voltage circuit breaker 100, comprising at least a pole 101 having one or more movable contacts 102 with associated corresponding fixed contacts 103.
  • Contacts 102 are movable between a coupled position, wherein they are coupled to the corresponding fixed contacts 103, and a separated position wherein they are spaced away from the corresponding fixed contacts 103.
  • the switching device 100 can be actuated during its operation from an open position to a closed position so as to allow a current flowing therethrough and from the closed position to the open position so as to interrupt such current flowing.
  • the displacement of the movable contacts 102 from the separated position towards the coupled position allows a current flowing through the coupled movable and fixed contacts 102, 103 (closure actuation of the switching device), and the displacement of the movable contacts 102 from the coupled position towards the separated position causes the interruption of such current flowing (opening actuation of the switching device).
  • Figure 1 schematically illustrates a switching device 100 having for example three poles 101, each comprising a movable contact 102 and a corresponding fixed contact 103; such an embodiment has to be understood only as an illustrative and non limiting example, since the principles and technical solutions introduced in the following description can be applied to switching devices 100 having a number of poles 101 different with respect to the illustrate one, such as for example a switching device 100 with a single pole 101, or two poles 101, or four poles 101.
  • An operating mechanism 104 for example an energy-stored operating mechanism 104, is operatively connected to the movable contacts 102 so to cause the movement of such contacts 102 between the coupled and separated positions with respect to the corresponding fixed contacts 103, and therefore to cause the actuation of the switching device 100 between its closed position and its open position.
  • the coil actuator 1 is adapted to cause actuations of the switching device 100 where it is installed.
  • the coil actuator 1 comprises a coil electromagnet 2 arranged to move between a rest position (or released position) and an actuating position (or launched position), wherein the movement from the rest position to the actuating position is suitable to cause an actuation of the switching 100.
  • the coil actuator 1 can be installed and used into the switching device 100 as a closure actuator 1, wherein the movement of its coil electromagnet 2 from the released to the launched position causes the closure of the switching device 100, i.e. the actuation of the switching device 100 itself from the open position to the closed position.
  • the coil actuator 1 can be installed and used in the switching device 100 as an opening actuator 1, wherein the movement of its coil electromagnet 2 from the released to the launched position causes the opening of the switching device 100, i.e. the actuation of the switching device 100 itself from the closed position to the open position.
  • the coil electromagnet 2 of the coil actuator 1 comprises one or more parts 3 which are arranged to move, during the movement of the coil electromagnet 2 itself from the released to the launched position, so as to interact with one or more corresponding parts of the switching device 100; such operative interaction between the movable parts 3 of the coil electromagnet 2 and the corresponding parts of the switching device 100 causes the actuation of the switching device 100 itself.
  • the coil actuator 1 comprises for example a case which houses the coil electromagnet 2 and which is configured for allowing a part 3 of the coil electromagnet 2 itself, e.g. an anchor or plunger 3, to move between a first stable position, or retracted position, wherein it is retracted into the case (coil electromagnet 2 is in the released, or rest, position), and a second stable position, or launched position, wherein at least a portion of the movable part 3 is launched outside the case (coil electromagnet 2 is in the launched, or actuating, position).
  • a part 3 of the coil electromagnet 2 itself e.g. an anchor or plunger 3
  • the movable part 3 of the coil electromagnet 2 is arranged to release, through its movement from the retracted to the launched position, one or more corresponding mechanical parts of the operating mechanism 104 of the switching device 100, so as to cause the actuation of the switching device 100 itself.
  • the opening actuator 1 is installed into the switching device 100 in such a way that the interaction between the movable parts 3 of its electromagnet 2 and the corresponding parts of the switching device 100, e.g. parts of the operating mechanism 104, causes the opening of the switching device 100, i.e. the actuation of the switching device 100 itself from its closed to position to its open position.
  • the closure actuator 1 is installed into the switching device 100 in such a way that the interaction between the movable parts 3 of its electromagnet 2 and the corresponding parts of the switching device 100, e.g. parts of the operating mechanism 104, causes the closure of the switching device 100, i.e. the actuation of the switching device 100 itself from its open position to its closed position.
  • the switching device 100 illustrated in figure 1 comprises at least an opening actuator 1a and a closure actuator 1b.
  • the coil actuator 1 according to the present disclosure comprises electronic means 1000, embedded inside the coil actuator 1 itself.
  • the electronic means 1000 are advantageously arranged to count an operation time T operation associated to each actuation of the switching device 100 caused by the coil actuator 1 itself.
  • the counted operation time T operation is indicative of the duration of the associated actuation of the switching device 100, since that the operation time T operation comprises:
  • the operation time T operation to be counted is an opening operation time.
  • the counted opening operation time T operation is indicative of the duration of the actuation of the switching device 100 from the closed to the open position, since that it comprises the time required by the operating mechanism 104 to move the contacts 102 from the coupled to the separated position with respect to the corresponding fixed contacts 103.
  • the operation time T operation to be counted is a closure operation time.
  • the counted operation time T operation is indicative of the duration of the actuation of the switching device 100 from the open to the closed position, since that it comprises the time required by the operating mechanism 104 to move the contacts 102 from the separated to the coupled position with respect to the corresponding fixed contacts 103.
  • the opening actuator 1a and the closure actuator 1b comprise corresponding electronic means 1000 which are arranged to count opening operation times and the closure operation times of the illustrated switching device 100, respectively.
  • each operation time T operation associated to a corresponding actuation of the switching device 100 comprises a configurable delay time T delay .
  • the delay time T delay is set to have operation times T operation according to a required target operation time T target of the switching device 100.
  • the target operation time T target may vary due to different normatives or to different typologies of switching device 100 where the coil actuator 1 could be installed; the operation times T operation to be counted are accordingly adapted to the required target operation time T target through a suitable initial setting of their configurable delay time T delay .
  • the required target opening operation time T target for a mechanically operated medium voltage circuit breaker 100 is generally comprised in the range between 50 and 73 ms, while the required target closure operation time T target is typically comprised in the range between 50 and 70 ms.
  • the electronic means 1000 are arranged to receive and store such delay time T delay as a configurable parameter.
  • the electronic means 1000 are arranged to associate the configurable delay time T delay to the activation time of the coil actuator 1, for example introducing such delay T delay between the detection by the coil actuator 1 of the intervention request, or need, and the consequent electrical driving of the coil electromagnet 2 (to cause the movement thereof from the rest to the actuating position).
  • the present disclosure is also related to a method 700 for advantageously correcting the operation times T operation counted by the coil actuator 1 and associated to the actuations of the switching device 100 which are caused by the coil actuator 1 itself.
  • the electronic means 1000 of the coil actuator 1 are arranged to carry out the method 700 according to the present disclosure.
  • the electronic means 1000 are arranged to:
  • the determined correction time T correction is advantageously suitable to at least reduce the difference between the target operation time T target required for the switching device 100 and the counted corrected operation time T operation2 -T operationN .
  • the electronic means 1000 are arranged to receive and store the target operation time T target for the switching device 100 as a configurable parameter.
  • the electronic means 1000 are arranged to determine the correction time T correction by comparing the target operation time T target to the counted operation time T operation1 associated to the first actuation of the switching device 100. Accordingly the step 601 of the method 700 comprises determining the correction time T correction by comparing the target operation time T target to the counted operation time T operation1 .
  • the correction time T correction is given by the difference between the target operation time T target and the counted operation time T operation1 .
  • the correction time T correction could be positive or negate, depending if the counted operation time T operation1 is greater or smaller than the target operation time T target .
  • the electronic means 1000 of the coil actuator 1 are arranged to apply at least an amount of the correction time T correction to the configurable delay time T delay of the operation time T operation2 -T operationN which is associated to said at least one subsequent actuation of the switching device 100 occurring after the first actuation.
  • step 602 of the method 700 comprises the step 605 of applying at least an amount of the correction time T correction to the configurable delay time T delay of the operation time T operation2 -T operationN associated to said at least one subsequent actuation.
  • the configurable delay time T delay of such operation time T operation2 -T operationN is modified by applying thereto at least an amount of the correction time T correction .
  • Such modification is the correction suitable for at least reducing the difference between the target operation time T target and the counted corrected operation time T operation2 -T operationN .
  • the electronic means 1000 are arranged to use the determined correction time T correction to correct the operation time T operation2 associated to such second actuation.
  • the electronic means 1000 are arranged to apply the overall determined correction time T correction to the configurable delay time T delay of the operation time T operation2 (method step 605 illustrated in figure 7 ).
  • the overall correction T correction is directly added the configurable delay time T delay of the operation time T operation2 .
  • the electronic means 1000 are arranged to:
  • the electronic means 1000 Basing on the counted operation time T operation1 associated to the first actuation of the sequence, the electronic means 1000 firstly determine a correction time T correction , having for instance a value of 6 ms.
  • the electronic means 1000 of the coil actuator 1 comprise:
  • the driving means 10 are arranged to electrically drive the coil electromagnet 2 to cause at least the movement thereof from the released position to the launched position upon the detection of the launch event by the detection means 11.
  • the detection means 11 of the coil actuator 1 are arranged to detect also a second event which is indicative of the end of the actuation of the switching device 100, wherein such actuation is caused by the coil actuator 1 itself upon the detection of the launch event and the consequently movement of its coil electromagnet 2.
  • the electronic means 1000 of the coil actuator 1 further comprise counting means 20 which are operatively associated to the detection means 11 and are arranged to count the operation time T operation associated to each actuation of the switching device 100 caused by the coil actuator 1 itself upon the detection of a launch event.
  • the counted operation time T operation is an opening operation time associated to the actuation of the switching device 100 from the closed to the open position.
  • the counted operation time T operation is a closure operation time associated to the actuation of the switching device 100 from the open to the closed position.
  • the counting means 20 are arranged to start counting the operation time T operation when the launch event is detected by the detection means 11, and to stop such counting when the second event is detected by the detection means 11. Therefore, the detection of the launch event and the detection of the second event trigger the start and the end, respectively, of the counting performed by the counting means 20.
  • the driving means 10 are arranged to apply the configurable delay time T delay of the operation time T operation to be counted between the detection of the launch event and the consequent electrical driving of the coil electromagnet 2.
  • the driving means 10 are arranged to apply the configurable delay time T delay as modified by applying thereto at least an amount of the previously determined correction time T correction, in such a way to correct the operation time T operation to be actually counted.
  • the electronic means 1000 of the coil actuator 1 comprise comparing means 21 operatively associated to the counting means 20 and arranged to compare the counted operation time T operation with a temporal acceptance range T range which is indicative of an acceptable value for the switching device 100.
  • the comparing means 21 are arranged to receive and store the acceptance range T range as a configurable parameter.
  • the coil actuator 1 is arranged to cause the generation of an alarm signaling, e.g. the generation of at least an alarm signal and/or indication, when the counted operation time T operation exceeds the associated temporal range T range .
  • the coil actuator 1 can be installed and used in the switching device 100 as a shunt opening release 1 (such as for example the coil actuator 1a in figure 1 ) configured for opening the switching device 100 following an opening command and/or signal, or alternatively can be installed and used in the switching device 100 as a shunt closure actuator 1 (such as for example the coil actuator 1b in figure 1 ) configured for closing the switching device 100 following a closure command and/or signal.
  • a shunt opening release 1 such as for example the coil actuator 1a in figure 1
  • a shunt closure actuator 1 such as for example the coil actuator 1b in figure 1
  • the opening and closure commands and/or signals can be generated automatically by suitable means or by an operator, and can be generated inside the switching device 100 or received by remote.
  • an opening, or trip, command can be generated by a protection device installed into the switching device 100 upon the detection of an electrical fault.
  • the driving means 10 of the coil actuator 1 are arranged to electrically drive the coil electromagnet 2 so as to hold it in the launched position and so as to allow the return thereof from the launched position to the release position upon the detection of the second event, or release event, by the detection means 11.
  • such driving means 10 comprise a power input circuit 12 arranged to be operatively connected to and receive an input voltage V in from at least a power source, e.g. a power associated to the switching device 100 and/or to the electric circuit into which the switching device 100 itself is installed, for example a power line 200 associated to the switching device 100 (see figure 3 ).
  • a power source e.g. a power associated to the switching device 100 and/or to the electric circuit into which the switching device 100 itself is installed, for example a power line 200 associated to the switching device 100 (see figure 3 ).
  • the power input circuit 12 is arranged to use the received input voltage V in to provide a suitable power supply to several components and/or elements of the coil actuator 1, in particular to its electronic means 1000.
  • the power input circuit 12 may comprise one or more input filters and a rectifier to convert the AC voltage received from the power line 200 to a DC input voltage.
  • the detection means 11 are arranged to continuously sense a voltage indicative of the input voltage V in , i.e. to sense directly the voltage V in applied to the power input circuit 12, or indirectly through a voltage generated in the coil actuator 1 and depending on such input voltage V in .
  • the detection means 11 are arranged to detect, by means of the sensed voltage, a first threshold value, or launch threshold value V th _ launch , and a second threshold value, or release threshold value V th_release , of the input voltage V in , wherein the launch threshold value V th_launch is preferably higher than the release threshold value V th_release .
  • the driving means 10 are operatively associated to the detection means 11 so as to electrically drive the coil electromagnet 2 for moving and holding the coil electromagnet 2 itself in the launched position upon the detection of the launch threshold value V th _ launch .
  • the launch and hold operations of the coil electromagnet 2 are executed by the driving means 10 using the power drawn from the input voltage V in , having a value above the launch threshold value V th_launch .
  • the driving means 10 are operatively associated to the detection means 11 so as to at least reduce, preferably interrupt, the electrical driving of the coil electromagnet 2 for allowing the return thereof from the launched position to the release position, upon the detection of the release threshold value V th_release by the detection means 11.
  • the detection of the launch threshold value V th _ launch and the detection of the release threshold value V th_relesase are the launch event and the release event which trigger the start and the end, respectively, of the counting performed by the counting means 20 (see the plot illustrated as an example in figure 4 ).
  • the coil actuator 1 comprises a single coil electromagnet 2, i.e. a coil electromagnet 2 having a single electromagnetic coil 4 operatively associated to the movable part 3 and electrically connected to the driving means 10; in particular, the driving means 10 are arranged to: generate a launch current I L flowing through the electromagnetic coil 4 so as to generate a magnetic force suitable for moving the part 3 from the retracted to the launched position; and consequently reduce and maintain the launch current I L at a holding current I H suitable for holding the movable part 3 in the launched position.
  • the driving means 10 illustrated in figure 2 advantageously comprise a first control unit 31 and a second control unit 32, wherein the second control unit 32 is suitable for controlling the current flowing through the single coil electromagnet 2 and the first control unit 31 is operatively connected to the second control unit 32 for setting the current which has to flow through the single coil electromagnet 2.
  • the first control unit 31 can be any electronic device suitable for receiving and executing software instructions, and for receiving and generating output data and/or signals through a plurality of input and/or output ports.
  • the controller 31 may be a microcontroller 31, such as the MSP430 microprocessor produced and made available in commerce by Texas Instruments®.
  • the driving means 10 comprise a power circuit 37 operatively connected to the single coil electromagnet 2 and to the second control unit 32 so as to generate the current flowing through the single coil electromagnet 2 according to the control performed by the second control unit 32.
  • the second control unit 32 is for example a PWM ("Pulse width modulation") controller 32 and the associated power circuit 37 comprises: an electronic power switch 40 to electrically drive the single coil electromagnet 2, such as a power MOSFET ("metal-oxide-semiconductor field-effect transistor"); a freewheeling diode 41; and a sense resistor 43 for measuring the current flowing through the single coil electromagnet 2.
  • the PWM controller 32 is configured for driving the power switch 40 through a PWM signal 400 so as to regulate the current flowing through the single coil electromagnet 2 according to the settings received from the control unit 31.
  • the power input circuit 12 is operatively connected to the power circuit 37, the first control unit 31 and the second control unit 32 to provide them the power required to operate; preferably, a power converter 35 is provided to convert and adapt the voltage outputted by the power input circuit 12 into values suitable for supplying the first and second controllers 31, 32.
  • the controller 31 stores instructions which, when executed by the controller 31 itself, carry out the method 700 according to the present disclosure.
  • the stored instructions are suitable to implement all the functionality blocks required to carry out the method, among them the detection means 11 and the counting means 20. If provided, the stored instructions are also suitable to implement the comparing means 21.
  • the controller 31 is arranged to receive and store configurable parameters, for example through a software download operation, comprising at least the launch and release voltage threshold values V th_launch , V th_release of the detection means 11, the target operation time T target , the configurable delay time T delay and the temporal range T range of the comparing means 21.
  • a jumper 39 can be operatively connected to the controller 31 to allow the resetting of at least a stored configurable parameter.
  • an input port 302 of the controller 31 is associated to the implemented detection means 11 and is electrically connected at the electrical point where the input voltage V in is applied to the power input circuit 12 (as shown schematically in figure 2 ), so as to continuously and directly sense such input voltage V in .
  • the coil electromagnet 2 may comprise two electromagnetic coils, or windings, operatively associated to the movable part 3, wherein the driving means 10 connected to such coil electromagnet 2 would be arranged to selectively energize the two coils for moving the part 3 from the retracted to the launched position and for holding such movable part 3 in the launched position, until a release event is detected by the detection means 11.
  • the power input circuit 12 of the shunt release 1 illustrated in figure 2 is operatively connected to the power source 200 through cables 13 and at least a contact 201 is placed along the power delivery path from the power source 200 to the power input circuit 12 so as to realize or interrupt such delivery path according to its closure or opening, respectively.
  • the closure of the contact 201 is driven by an opening command and/or signal 202.
  • the closure of the contact 201 is driven by a closure command and/or signal 202.
  • the contact 201 may be a contact of a protection relay, closed upon the occurrence of a fault event detected by the protection device itself, or may be a button actuable by an operator.
  • the electrical connection between the power input circuit 12 and the power supply 200 through the closure of the contact 201 causes the rising of the input voltage V in above the launch threshold value V th_launch , in such a way that the driving means 10 are supplied with the power required to perform the launch and hold operations of the coil electromagnet 2.
  • the launch operation of the coil electromagnet 2 causes the opening of the switching device 100 if the coil actuator 1 is installed and used in the switching device 100 as a shunt opening release 1, or causes the closure of the switching device 100 if such coil actuator 1 is installed and used in the switching device 100 as a shunt closure release 1.
  • the counting means 20 starts counting the operation time T operation .
  • auxiliary contact 203 Placed along the power delivery path realized by the closure of the contact 201 there is also at least an auxiliary contact 203 which is operatively connected to one or more movable contacts 102 of the switching device 100 so as to move between an open operative status and a closed operative status according to the movement of the contacts 102.
  • the auxiliary contact 203 is suitable for interrupting the associated delivery path when it moves from its closed to its open status.
  • the auxiliary contact 203 is operatively connected to the corresponding movable contacts 102 so as to be in its closed status while the switching device 100 is in its closed position, and to reach its open status at the end of the opening operation of the switching device 100 caused by the shunt opening release 1 itself, i.e. when the movable contacts 102 reach their separated position with respect to the corresponding fixed contacts 103.
  • the auxiliary contact 203 is operatively connected to the corresponding movable contacts 102 so as to be in the closed status while the switching device 100 is in its open position, and to reach its open status at the end of the closure of the switching device 100 caused by the shunt closure release 1, i.e. when the movable contacts 102 reach their coupled position with respect to the corresponding fixed contacts 103.
  • the coil actuator 1 can be conceived and installed into the associated switching device 100 to operate as a shunt undervoltage release 1, i.e. to intervene for opening and/or the switching device 100 upon the detection of an undervoltage condition.
  • the switching device 100 in figure 1 comprises a shunt undervoltage release 1c.
  • the driving means 10 of the electronic means 1000 embedded in the undervoltage shunt release 1 are operatively connected to at least a power source (depicted in figure 5 by the block indicated with the numeral reference 500) that is associated to the switching device 100 and/or to the electric circuit into which such switching device 100 is installed.
  • the undervoltage shunt release 1 is connected to the power source 500 so as to receive therefrom the power required to hold the coil electromagnet 2 in its released (or rest) position, e.g. the power required to keep the movable part 3 of the coil electromagnet in the retracted position against a force generated by compressed elastic means.
  • the detection means 11 of the electronic means 1000 embedded in the undervoltage release 1 are arranged to detect a condition, or event, indicative of the occurrence of the undervoltage condition.
  • the detection means 11 are arranged to:
  • the driving means 10 are arranged to at least reduce, preferably interrupt, the energizing of the coil electromagnet 2 so as to cause the movement of the part 3 from the retracted to the launched position upon the detection of the undervoltage condition.
  • the detection of the undervoltage condition by the detection means 11 is the launch event that triggers the start of the counting of the opening operation time T operation by means of the counting means 20 provided in the electronic means 1000.
  • the detection means 11 are also arranged to detect the event indicative of the end of the opening of the switching device 100, opening operation caused by the shunt undervoltage release 1; such detection is the event that triggers the end of the counting of the opening operation time T operation .
  • the detection means 11 in figure 5 are arranged to detect an electrical signal 501 suitable for signaling the end of the opening operation of the switching device 100 caused by an undervoltage condition, such as a signal 501 generated by the closure of a contact 302 operatively connected to one or more of the movable contacts 102 of the switching device 100 so as to close when such one or more movable contacts 102 reach their separated position with respect to the corresponding fixed contacts 103.
  • an electrical signal 501 suitable for signaling the end of the opening operation of the switching device 100 caused by an undervoltage condition such as a signal 501 generated by the closure of a contact 302 operatively connected to one or more of the movable contacts 102 of the switching device 100 so as to close when such one or more movable contacts 102 reach their separated position with respect to the corresponding fixed contacts 103.
  • the driving means 10 are arranged to apply the configurable delay time T delay of the operation time T operation to be counted, between the detection of the undervoltage condition and the consequent electrical driving of the coil electromagnet 2 (to cause the movement of the part 3 from the retracted to the launched position).
  • the driving means 10 are arranged to apply the configurable delay time T delay as modified by applying thereto at least an amount of the previously determined correction time T correction , in such a way to correct the operation time T operation to be counted.
  • the undervoltage shunt release 100 illustrated in figure 5 further comprises: the comparing means 21 for comparing the counted opening operation time T operation with the temporal range T range ; and alarm generating means 510 operatively associated to the comparing means 21 and arranged to generate an alarm signal and/or indication if the counted opening operation time T operation exceeds the temporal range T range .
  • the coil actuator 1 according to the present disclosure is arranged to provide a continuous power supply to its electronic means 1000, at least for a time required to implement the various steps of the method 700 according to the present disclosure.
  • the coil actuator 1 is also arranged to provide a continuous power supply to such comparing means 21, at least for a time required to complete the comparison operation.
  • the undervoltage shunt release 1 comprises at least a backup capacitor 511 suitable for storing energy drawn by the V supply applied to the undervoltage shunt release 1 and connected at least to the electronic means 1000 so as to release the stored energy thereto, starting from the occurrence of the undervoltage condition.
  • the backup capacitor 511 (or alternatively other suitable energy storage means) is also connected to: the detection means 11, so as to provide them the power required to detect the signal 501 indicative of the end of the opening operation of the switching device 100, even during the undervoltage condition; and the alarm generating means 510, so as to provide them the power required to generate the alarm signaling, even during the undervoltage condition.
  • the coil actuator 1 can comprise a backup capacitor connected to the power input circuit 12 so as to be charged while the input voltage V in is applied to the coil actuator 1 itself by the power source 200.
  • the backup capacitor may be the smoothing capacitor used in the power input circuit 12 to rectify the AC voltage received from the power line 200 to a DC input voltage.
  • the electronic means 1000 of the coil actuator 1 are operatively connected to the power input circuit 12 of the driving means 10.
  • the power input circuit 12 is in turn arranged to be operatively connected to the associated power source 200 so as to receive therefrom the power required to continuously supply at least a minimum input voltage V in_min to the electronic means 1000; the minimum input voltage V in_min is suitable for providing the electronic means 1000 with the power required to complete at least the required steps of the method 700.
  • the coil actuator 1 is advantageously arranged to be operatively connected a trip circuit supervisor 150 installed into the switching device 100.
  • the trip circuit supervisor 150 is arranged to check the integrity of the coil electromagnet 2, e.g. the integrity of the electromagnetic coil 4 in the coil actuator 1 illustrated figure 2 , and of the driving means 10 associated thereto (coil supervision and feedback routine).
  • the trip circuit supervisor 150 may be a supervision relay of the type well known in the art, and therefore not further described herein.
  • the power input circuit 12 of the coil actuator 1 is arranged to be operatively connected to the trip circuit supervisor 150 so as to continuously receive, through such trip circuit supervisor 150, the power required to supply the minimum input voltage V in_min to the electronic means 1000.
  • the power input circuit 102 in figure 2 provides, through the trip circuit supervisor 150, the minimum input voltage V in_min to the first control unit 31, the PWM controller 32, and the power circuit 37.
  • the input minimum voltage V in_min is suitable to supply the minimum power required from the coil actuator 1 to work and perform its main functionalities.
  • the trip circuit supervisor 150 is placed along a power delivery path from the power source 200 to the power input circuit 12 of the coil actuator 1, wherein such delivery path is parallel with respect to the power delivery path comprising the contact 201 and the auxiliary contact 203. In this way, when the contact 201 or the auxiliary contact 203 interrupts the associated power delivery path, the coil actuator 1 remains powered to work through the trip circuit supervisor 150.
  • the detection means 11 of the coil actuator 1 are also arranged to detect the minimum input voltage V in_min and the driving means 10 are arranged to electrically drive the coil electromagnet 2 to generate a coil supervisor current I cs flowing through such coil electromagnet 2 when the input voltage V in is detected to be in the range comprised between the minimum input voltage V in_min and the release threshold value V th_release .
  • the coil supervisor current I cs is lower than the currents generated by the driving means 10 to perform the launch and hold operations of the coil electromagnet 2; for example, the supervisor current I cs is lower than the launch current I L and the hold current I H flowing through the electromagnetic coil 4 of the coil actuator 1 illustrated in figure 2 .
  • the current I tc flowing through the trip circuit supervisor 150 depends on the supervisor current I cs flowing through the coil electromagnet 2; the driving means 10 are arranged to: monitor the current I cs or at least a parameter associated to such current I cs ; check the integrity of the coil electromagnet 2 basing on such monitoring of the supervisor current I cs ; at least reduce, preferably interrupt, the current I cs upon the checking of a failure in the coil electromagnet 2.
  • the trip circuit supervisor 150 is configured for: sensing the current I tc flowing therethrough; detecting the reduction of the such current I ts below a first predetermined threshold, wherein the reduction of the current I ts is due to the reduction of the supervisor current I cs ; and generating an alarm signaling 151 upon such detection.
  • an input port 300 of the controller 31 is operatively connected to the output 301 of the PWM controller 32 from which the PWM signal 400 is sent to the MOSFET 40; for example, a low pass filter 38 is used to convert the PWM signal 400 into a voltage suitable for being measured by the controller 31.
  • the controller 31 measures the duty cycle "D" of the PWM signal 400, such duty cycle D depending on the input voltage V in , the current set by the controller 31 and the coil impedance of the single coil electromagnet 2 (i.e. the electrical impedance associated to electromagnetic coil 4).
  • the measurement of the duty cycle D provides an indication on the integrity of the single coil electromagnet 2.
  • the controller 31 is configured for comparing the measured duty cycle D to a predetermined acceptance range, preferably a configurable acceptance range, and for changing the current settings sent to the PWM controller 32 to at least reduce, preferably interrupt, the current I cs flowing through the single coil electromagnet 2 when the measured duty cycle D exceeds the acceptance range.
  • the current I tc is therefore reduced so as to activate the alarm signaling 151 of the trip circuit supervisor 150.
  • the comparing means 11 and the driving means 10 of the coil actuator 1 are operatively associated each other (in particular in the coil actuator 1 of figure 2 are both implemented by the controller 31), and the driving means 10 are advantageously arranged to at least reduce, preferably interrupt, the supervisor current I cs when the comparing means 11 detect that the counted operation time T operation exceeds the temporal range T range of the comparing means 21.
  • the supervisor current I cs is reduced by the driving means 10 so as the current I tc flowing through the trip circuit supervisor 150 falls below the first predetermined threshold.
  • reduction of the supervisor current I cs simulates the detection of a failure in the coil electromagnet 2 and consequently activates the alarm signaling 151 already provided in the trip circuit supervisor 150.
  • the shunt trip supervisor 150 may be configured for discriminating between a first condition wherein a fault occurs in the supervised coil electromagnet 2 and a second condition wherein the counted operation time T operation exceeds the temporal range T range .
  • the shunt trip supervisor 150 can be arranged to generate two different alarm signaling, one indicative of the first condition and the other of the second condition.
  • the driving means 10 can be arranged to reduce the supervisor current I cs so as the current I tc flowing through the trip circuit supervisor 150 falls below a second predetermined threshold, different with respect to the first threshold, when the comparing means 11 detect that the counted operation time T operation exceeds the temporal range T range of the detection means 11.
  • the shunt trip supervisor 150 is arranged to detect when the current I tc which has fallen below the second threshold also falls below the first threshold; if the current I tc falls below also to the first threshold, the trip circuit supervisor 150 is arranged to generate the alarm signaling 151 indicative of a fault in the supervised coil electromagnet 2. If the current I tc does not fall below also to the first threshold, the trip circuit supervisor 150 is arranged to generate an alarm signaling, different to the above mentioned alarm signaling 151, which is dedicate for signaling the exceeding of the temporal range T range .
  • the shunt trip supervisor 150 is arranged to detect when the current I tc which has fallen below the first threshold also falls below the second threshold; if the current I tc falls below also the second threshold, the trip circuit supervisor 150 is arranged to generate an alarm signaling indicative of the exceeding of the temporal range T range . If the current I tc does not fall below also to the second threshold, the trip circuit supervisor 150 is arranged to generate the alarm signaling 151 indicative of a fault in the supervised coil electromagnet 2.
  • the coil actuator 1 is arranged to count by itself the operation times T operation associated to the actuations of the switching device 100, therefore providing an easy and economical solution that does not require other additional or external equipments connected to the switching device 100. In this way, additional and complex cabling and wiring, extra-costs, and encumbrance into the switching device 100 are avoided.
  • the disclosed method 700 (carried out by the electronic means 1000 of the coil actuator 1) is suitable to correct the operation times T operation associated to the actuations of the switching device caused by the coil actuator 1, in such a way as the counted corrected operation times T operation remain all close to the required target operation time T target of the switching device 100, despite of the variations manly introduced by the operation of the operating mechanism 104.
  • the operative live of the switching device 100 is improved because all the operations/functionalities which are associated to the switching device 100 and synchronized to the counted operation time T operation can occur more correctly about at the required target time T target .
  • the correction method 700 also improves the adaptability of the coil actuator 1 to different switching devices 100, having the same required target operation time T target but different times required by their operating mechanisms 104 to actuate the switching device themselves. In that case, the method 700 automatically corrects the operation times T operation to remain close to the target operation time T target , despite of the time difference between the times required by the actuating mechanism 104 of the first and second switching devices 100. Furthermore, a trip circuit supervisor 150 can be advantageously connected to the coil actuator 1 in such a way that, after the auxiliary contact 103 opens, the coil actuator 1 remains powered to work.
  • the coil actuator 1 may be configured for activating the alarm signaling 151 already provided in the trip circuit supervisor 150 for signaling failures in the associated electromagnetic coil 2, so as to signal also undesired conditions of unduly operation long times for closing or opening the switching device 100.
  • the present disclosure also encompasses a switchgear comprising at least a switching device 100 and/or at least a coil actuator 1 according to the present disclosure.
  • the controller 31 may be arranged to directly generate an alarm signaling upon the detection of a counted operation time T operation exceeding the predetermined temporal range T range .
  • the functional blocks in the coil actuator 1 i.e. the driving means 10, the counting means 20, the detection means 11, and the comparing means 21, may be all implemented in a single electronic unit through the execution of suitable instructions, or alternatively one or more of such functional block may be implemented by dedicated electronic means and/or units suitably connected each other.
  • the counting means 20 may be implemented by a digital counter 20 triggered by the detection means 11, which in turn may be implemented for example by an electronic circuit comprising a comparator.
  • controller 31 has been indicated to be for example a microprocessor, such controller 31 can also be a microcomputer, a minicomputer, a digital signal processor (DSP), an optical computer, a complex instruction set computer, an application specific integrated circuit, a reduced instruction set computer, an analog computer, a digital computer, a solid-state computer, a single-board computer, or a combination of any of theses.
  • DSP digital signal processor
  • instructions, data, signals and parameters can be delivered to the controller 31 via electronic data carts, manual selection and control, electromagnetic radiation, communication buses, and generally through any suitable electronic or electrical transfer.

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  • Control Of Linear Motors (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (12)

  1. Actionneur à bobine (1) pour un dispositif de commutation électrique (100) qui peut être actionné lors de son fonctionnement d'une position ouverte à une position fermée de manière à permettre une circulation de courant à travers celui-ci et de ladite position fermée à ladite position ouverte de manière à interrompre une telle circulation de courant, ledit actionneur à bobine (1) étant adapté pour provoquer des actionnements dudit dispositif de commutation (1), chacun desdits actionnements ayant un temps de fonctionnement (Toperation1-ToperationN) qui lui est associé et ledit temps de fonctionnement comprenant un temps de retard configurable (Tdelay), caractérisé en ce qu'il comprend des moyens électroniques (1000) agencés :
    - pour compter (600) un premier temps de fonctionnement (Toperation1) associé à un premier actionnement du dispositif de commutation (100) provoqué par l'actionneur à bobine (1) ;
    - pour déterminer (601) un temps de correction (Tcorrection) en comparant un temps de fonctionnement cible (Ttarget) audit premier temps de fonctionnement compté (Toperation1) ;
    - pour appliquer (605) au moins une quantité dudit temps de correction (Tcorrection) au temps de retard configurable (Tdelay) d'un temps de fonctionnement (Toperation2-ToperationN) associé à au moins un actionnement ultérieur du dispositif de commutation (100) provoqué par l'actionneur à bobine (1) et se produisant après ledit premier actionnement, de manière à modifier ledit temps de retard configurable (Tdelay) et à réduire la différence entre ledit temps de fonctionnement (Toperation2-ToperationN) et ledit temps de fonctionnement cible (Ttarget) ;
    - pour compter (603) le temps de fonctionnement corrigé (Toperation2-ToperationN) associé audit au moins un actionnement ultérieur.
  2. Actionneur à bobine (1) selon la revendication 1, dans lequel ledit au moins un actionnement ultérieur comprend au moins un deuxième actionnement du dispositif de commutation se produisant après ledit premier actionnement, et où lesdits moyens électroniques (1000) sont agencés pour appliquer (605) ledit temps de correction (Tcorrection) au temps de retard configurable (Tdelay) du temps de fonctionnement (Toperation2) associé audit deuxième actionnement.
  3. Actionneur à bobine (1) selon la revendication 1, dans lequel ledit au moins un actionnement ultérieur comprend une pluralité d'actionnements ultérieurs du dispositif de commutation (100), et dans lequel lesdits moyens électroniques (1000) sont agencés :
    - pour diviser (604) ledit temps de correction déterminé (Tcorrection) en une pluralité d'additifs (Tadd1-TaddN-1) ; et
    - pour appliquer (6051-605N-1) chaque additif de ladite pluralité d'additifs (Tadd1-TaddN-1) au temps de retard configurable (Tdelay) d'un temps de fonctionnement correspondant (Toperation2-ToperationN) qui est associé à un actionnement de ladite pluralité d'actionnements ultérieurs.
  4. Actionneur à bobine (1) selon l'une ou plusieurs des revendications précédentes, comprenant un électro-aimant à bobine (2) agencé pour se déplacer entre une position de repos et une position d'actionnement, dans lequel le mouvement de la position de repos à la position d'actionnement est approprié pour provoquer l'actionnement dudit dispositif de commutation (100), et dans lequel lesdits moyens électroniques (1000) comprennent :
    - des moyens de détection (11) agencés pour détecter un premier événement ;
    - des moyens d'entraînement (10) associés de manière fonctionnelle auxdits moyens de détection (11) et reliés de manière fonctionnelle audit électro-aimant à bobine (2), lesdits moyens d'entraînement (10) étant agencés pour entraîner électriquement l'électro-aimant à bobine (2) pour provoquer le mouvement de cet électro-aimant à bobine (2) de la position de repos à la position d'actionnement lors de la détection dudit premier événement par les moyens de détection (11), lesdits moyens de détection (11) étant agencés également pour détecter un deuxième événement qui indique la fin de l'actionnement du dispositif de commutation (100) provoqué par ledit mouvement de l'électro-aimant à bobine (2) de la position de repos à la position d'actionnement ;
    - des moyens de comptage (20) associés de manière fonctionnelle auxdits moyens de détection (11) et agencés pour commencer le comptage lorsque ledit premier événement est détecté par les moyens de détection (11) et pour arrêter ce comptage lorsque le deuxième événement est détecté par les moyens de détection (11).
  5. Actionneur à bobine (1) selon la revendication 4, dans lequel lesdits moyens d'entraînement (10) sont agencés pour appliquer ledit temps de retard configurable (Tdelay) entre la détection dudit premier événement et l'entraînement électrique conséquent de l'électro-aimant à bobine (2).
  6. Actionneur à bobine (1) selon la revendication 4 ou 5, dans lequel lesdits moyens d'entraînement (10) comprennent un circuit d'entrée de puissance (12) agencé pour être relié de manière fonctionnelle à et pour recevoir une tension d'entrée (Vin) à partir d'au moins une source de puissance (200), lesdits moyens de détection (11) étant agencés pour détecter une tension qui indique ladite tension d'entrée (Vin) et pour détecter une première valeur seuil (Vth_launch) et une deuxième valeur seuil (Vth_release) d'une telle tension d'entrée (Vin), dans lequel la détection de ladite première valeur seuil (Vth_launch) et la détection de ladite deuxième valeur seuil (Vth_release) correspondent audit premier événement et audit deuxième événement, respectivement.
  7. Actionneur à bobine (1) selon la revendication 4 ou 5, dans lequel lesdits moyens d'entraînement (10) sont reliés de manière fonctionnelle à au moins une source de puissance (500) de manière à recevoir de celle-ci la puissance nécessaire pour maintenir l'électro-aimant à bobine (2) en position de repos, et en ce que lesdits moyens de détection (11) sont agencés pour détecter la chute d'une tension (Vsupply) associée à ladite au moins une source de puissance (500) en dessous d'une valeur seuil de sous-tension prédéterminée, dans lequel la détection d'une telle chute de tension correspond audit premier événement.
  8. Dispositif de commutation (100), caractérisé en ce qu'il comprend au moins un actionneur à bobine (1) selon l'une ou plusieurs des revendications 1 à 7.
  9. Appareillage de commutation caractérisé en ce qu'il comprend au moins un dispositif de commutation (100) selon la revendication 8 et/ou au moins un actionneur à bobine (1) selon l'une ou plusieurs des revendications 1 à 7.
  10. Procédé (700) de correction de temps de fonctionnement (Toperation1-ToperationN) comptés par un actionneur à bobine (1) et associés à des actionnements d'un dispositif de commutation (100) qui sont provoqués par ledit actionneur à bobine (1), où chacun desdits temps de fonctionnement comprend un temps de retard configurable (Tdelay), le procédé étant caractérisé en ce qu'il comprend le fait :
    - de compter (600) un premier temps de fonctionnement (Toperation1) associé à un premier actionnement du dispositif de commutation (100) provoqué par l'actionneur à bobine (1) ;
    - de déterminer (601) un temps de correction (Tcorrection) en comparant un temps de fonctionnement cible (Ttarget) audit premier temps de fonctionnement Compté (Toperation1) ;
    - d'appliquer (605) au moins une quantité dudit temps de correction (Tcorrection) au temps de retard configurable (Tdelay) d'un temps de fonctionnement (Toperation2-ToperationN) associé à au moins un actionnement ultérieur du dispositif de commutation (100) provoqué par l'actionneur à bobine (1) et se produisant après ledit premier actionnement, de manière à modifier ledit temps de retard configurable (Tdelay) et à réduire la différence entre ledit temps de fonctionnement (Toperation2-ToperationN) et ledit temps de fonctionnement cible (Ttarget) ;
    - de compter (603) le temps de fonctionnement corrigé (Toperation2-ToperationN) associé audit au moins un actionnement ultérieur.
  11. Procédé (700) selon la revendication 10, dans lequel ledit au moins un actionnement ultérieur du dispositif de commutation (100) comprend au moins un deuxième actionnement se produisant après ledit premier actionnement, et dans lequel l'application (605) de ladite au moins une quantité du temps de correction (Tcorrection) comprend le fait :
    - d'appliquer (605) ledit temps de correction (Tcorrection) au temps de retard configurable (Tdelay) du temps de fonctionnement (Toperation2) associé audit deuxième actionnement.
  12. Procédé (700) selon la revendication 10, dans lequel ledit au moins un actionnement ultérieur du dispositif de commutation (100) comprend une pluralité d'actionnements ultérieurs, et dans lequel l'application (605) d'au moins une quantité dudit temps de correction (Tcorrection) comprend le fait :
    - de diviser (604) ledit temps de correction (Tcorrection) en une pluralité d'additifs (Tadd1-TaddN-1) :
    - d'appliquer (6051-605N-1) chaque additif de ladite pluralité d'additifs (Tadd1-TaddN-1) au temps de retard configurable (Tdelay) d'un temps de fonctionnement correspondant (Toperation2-ToperationN) qui est associé à un actionnement de ladite pluralité d'actionnement ultérieurs.
EP12178942.4A 2012-08-02 2012-08-02 Actionneur à bobine pour dispositif de commutation et procédé de correction correspondant Not-in-force EP2693456B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12178942.4A EP2693456B1 (fr) 2012-08-02 2012-08-02 Actionneur à bobine pour dispositif de commutation et procédé de correction correspondant
PCT/EP2013/064194 WO2014019798A1 (fr) 2012-08-02 2013-07-04 Actionneur hélicoïdal destiné à un dispositif de commutation et procédé de correction associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12178942.4A EP2693456B1 (fr) 2012-08-02 2012-08-02 Actionneur à bobine pour dispositif de commutation et procédé de correction correspondant

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EP2693456A1 EP2693456A1 (fr) 2014-02-05
EP2693456B1 true EP2693456B1 (fr) 2015-12-16

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EP3116662B1 (fr) 2014-03-12 2022-10-12 Koninklijke Philips N.V. Ensemble transducteur à ultrasons et procédé de fabrication d'un ensemble transducteur à ultrasons
CN117836639A (zh) * 2022-01-25 2024-04-05 Abb瑞士股份有限公司 用于监测开关设备的方法、装置和系统

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WO2009135519A1 (fr) * 2008-05-09 2009-11-12 Siemens Aktiengesellschaft Procédé et dispositif de commande d'actionneur magnétique

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