LU100027B1 - Locking device for an electromechanically actuated switch and switch comprising locking device - Google Patents

Locking device for an electromechanically actuated switch and switch comprising locking device Download PDF

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Publication number
LU100027B1
LU100027B1 LU100027A LU100027A LU100027B1 LU 100027 B1 LU100027 B1 LU 100027B1 LU 100027 A LU100027 A LU 100027A LU 100027 A LU100027 A LU 100027A LU 100027 B1 LU100027 B1 LU 100027B1
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LU
Luxembourg
Prior art keywords
locking
delay
locking device
delay circuit
circuit
Prior art date
Application number
LU100027A
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German (de)
Inventor
Diego Sologuren-Sanchez
Original Assignee
Abb Schweiz Ag
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Priority to LU100027A priority Critical patent/LU100027B1/en
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Publication of LU100027B1 publication Critical patent/LU100027B1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/32—Latching movable parts mechanically
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/20—Driving mechanisms
    • H01H13/24—Driving mechanisms with means for introducing a predetermined time delay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/10—Contacts retained open or closed by a latch which is controlled by an electromagnet
    • 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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/24—Interlocking, locking, or latching mechanisms for interlocking two or more parts of the mechanism for operating contacts

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Lock And Its Accessories (AREA)

Abstract

A locking device (10) for an electromechanically actuated switch (100) is disclosed. The locking device (10) comprises a locking element (20) being switchable at least into a lock position and an into an unlock position; and a delay circuit (30) providing a delay of a switching operation of the locking element (20). The delay circuit (30) comprises a delay capacitor (31) for effecting the delay. The delay circuit (30) is configured such that when the delay circuit (30) operates in an idle mode, the delay circuit (30) applies an idling voltage to the delay capacitor (31).

Description

LOCKING DEVICE FOR AN ELECTROMECHANICALLY ACTUATED SWITCH AND SWITCH COMPRISING LOCKING DEVICE
Technical Field
The present disclosure relates to a locking device for an electromechanically actuated switch and a switch comprising a locking device.
Background Art
Electromechanically actuated switches typically comprise a drive section having a motor and a drive such as a gear, wherein the drive section is configured to actuate a contact element of the switch upon receiving a corresponding control command. A locking device serves to mechanically lock a part of the drive section in place during certain modes of operation of the switch. A typical locking device comprises a locking element such as a mechanical pin or the like, the locking element being switchable between two mechanical positions (e. g. a lock position and an unlock position). The pin is arranged such that e. g. a rotor of the motor is blocked in rotary movement when the pin is in its lock position. A spring element may be provided to push the pin actively into the lock position, i. e. the locking device is configured to keep the locking element in a normally-locked or self-locked position. A solenoid or the like is provided to move the pin to its unlock position when the drive section is to be operated during an operation period, i. e. when the contact element of the switch is to be moved. In this case, the solenoid acts against the restoring force of the spring element. In order not to release the pin prematurely into the locked position, the solenoid has to be operated throughout the operation period of the switch.
An operation period of the switch may be more than 1 and less than 10 seconds, for example. Between subsequent operation periods, an operation-less period of more than a couple of hours or days, even weeks is conceivable. A locking device comprises a delay device, e. g. a mechanical delay device operating in the manner of a mechanical time switch, or an electric delay device comprising a delay element or a time-lag device. A delay element or time-lag device in the electric configuration of the delay device comprises a capacitor for effecting the delay, typically configured as an RC element having a certain time constant. In order to achieve a time constant of up to several hundreds of milliseconds, the capacitor is comprised of an electrolytic capacitor. An electrolytic capacitor is subject to an aging or deterioration process which determines its operational lifetime or serviceable lifetime. The lifetime of the electrolytic capacitor limits the overall lifetime of the locking device or of the switch.
Brief Summary of the Invention
In view of the above, a locking device according to claim 1 and a switch according to claim 11 are provided. Further aspects, advantages, and features of the present disclosure are apparent from the dependent claims, the description, and the accompanying drawings.
The aspects discussed below may be freely combined with each other, as appropriate.
According to one aspect of the disclosure, a locking device for an electromechanically actuated switch is provided. The locking device comprises a locking element being switchable at least into a lock position and an unlock position; and a delay circuit providing a delay of a switching operation of the locking element. The delay circuit comprises a delay capacitor for effecting the delay. The delay circuit is configured such that when the delay circuit operates in an idle mode, the delay circuit applies an idling voltage to the delay capacitor.
Switching between a lock position and an unlock position typically comprises an alternation, or transition, or movement, of the locking element such that it changes its position from the lock position into the unlock position, or vice versa.
Providing a delay of the switching operation typically comprises, upon a switching event, to effect the switching from the lock position into the unlock position of the locking element or from the unlock position into the lock position of the locking element in a delayed, or time-lagged, manner after the switching event occurred.
The switching event may be, for example, the rising edge or the falling edge of an activation pulse. Typically, the switching event is the falling edge of an activation pulse of the locking device, or a turn-off event of a switch which is equipped with the locking device. In a typical aspect, the transition of the locking element from its unlock position into its lock position is delayed.
The delay capacitor of the delay circuit is typically an electrolytic capacitor. The delay capacitor serves to effectuate, or produce, the delay. Typically, the delay circuit is operated in the idle mode during a period between subsequent switching operations of the locking element. Such a period may be, for example, on the order of hours or days.
When in the idle mode, the delay circuit applies a polarity-correct idling voltage having an absolute value different from 0 to the delay capacitor. It was surprisingly found out by the inventors that applying the idling voltage to the delay capacitor may extend the lifetime of the delay capacitor considerably.
According to a further aspect of the disclosure, the delay circuit is configured to apply the idling voltage constantly, or substantially without any interruption, to the delay capacitor when the delay circuit operates in the idling mode. In other words: According to this aspect, the idling voltage is applied substantially without being pulsed. This may contribute to enhancing the lifetime of the delay capacitor even further.
According to a further aspect of the disclosure, the idling voltage is at least 80% of an operating voltage of the delay capacitor. Typically, the idling voltage is at least 90% of the operating voltage of the delay capacitor. The operating voltage of the delay capacitor is typically the voltage at which the delay capacitor is operated within the circuit. The operating voltage may be close to the rated voltage or nominal voltage of the delay capacitor, but is not limited thereto. The operating voltage of the delay capacitor may correspond to the operating voltage of the locking device, or the operating voltage of the delay capacitor may be the operating voltage of the locking device. For example, the operating voltage of the delay capacitor may be at least 30% of the rated voltage of the delay capacitor and at most 95% of the rated voltage of the delay capacitor.
Furthermore, in the case of different or non-corresponding operating voltages of the delay capacitor on the one hand and of the locking device on the other hand, the idling voltage may be at least 80%, typically at least 90%, of the operating voltage of the locking device.
According to certain aspects of the disclosure, the absolute value of the idling voltage is higher than 30 V or higher than 50 V, typically higher than 100 V.
According to a further aspect of the disclosure, the locking device further comprises a control circuit configured to control an operation of the delay circuit in the idle mode depending on a switching cycle, wherein one switching cycle comprises one unlock time period during which the locking element is switched into the unlock position and one lock time period during which the locking element is switched into the lock position.
The control circuit controls, or triggers, the operation of the delay circuit, e. g. corresponding to an actuating operation of a switch which is provided with the locking device. In one switching cycle, the locking element is switched into the unlock position during, or throughout, the unlock time period. Similarly, in the same one switching cycle, the locking element is switched into the lock position during, or throughout, the lock time period.
The control circuit may, for example, make the delay circuit keep the locking element in the unlock position (i. e., throughout the unlock time period), and make the delay circuit keep the locking element in the lock position (i. e., throughout the lock time period).
This aspect is not to be understood as limiting a switching cycle to begin with an unlock time period, followed by a lock time period. Rather, the switching cycle may as well begin with a lock time period, followed by an unlock time period. During one switching cycle, there is one lock time period and one unlock time period.
According to a further aspect of the disclosure, the control circuit is configured to operate the idle mode of the delay circuit throughout at least 80%, typically throughout at least 90% of the lock time period, typically of each lock time period.
According to a further aspect of the disclosure, an average switching cycle is greater than 1 hour or 2 hours, typically greater than 1 day. According to a further aspect of the disclosure, the unlock time period of one switching cycle is less than 1 minute, typically less than 10 seconds or less than 5 seconds.
According to a further aspect of the disclosure, the locking device comprises a solenoid for operating the mechanical locking element. According to a further aspect of the disclosure, wherein the solenoid and the delay capacitor form an RC circuit. An RC circuit may have a time constant of more than 200 milliseconds or more than 500 milliseconds. The voltage signal seen by the solenoid after switching off the supply voltage for the solenoid is determined by the time constant of the RC circuit. When the voltage applied to the solenoid after the switch-off falls below a holding level or non-release level of the voltage, the solenoid is released or opened.
The time after a switch-off and the opening of the solenoid, which is determined by the time constant of the RC circuit, may be more than 1 second, typically more than 2 seconds, and less than 1 minute.
According to a further aspect of the disclosure, a switch is provided. The switch comprises a mechanically actuable contact element; an electromechanical drive section arranged to actuate the contact element; and a locking device as described herein. According to the aspect, the locking element of the locking device is arranged, or configured, such that in the lock position, it locks a mechanical operation of the drive section.
Brief Description of the Drawings
The subject matter of the disclosure will be explained in more detail with reference to preferred exemplary embodiments which are illustrated in the accompanying drawings.
In the drawings:
Fig. 1 is a diagram showing schematically a failure rate and a failure count of typical electrolytic capacitors over time;
Fig. 2 is a schematic representation of a locking device according to an embodiment of the present disclosure, with a locking element in a lock position;
Fig. 3 is a schematic representation of the locking device of Fig. 2, with the locking element in an unlock position; and
Fig. 4 is a schematic representation of a switch comprising the locking device of Figs. 2-3. Detailed Description of the Embodiments
Fig. 1 is a diagram showing schematically a failure rate and a failure count of typical electrolytic capacitors over time. In Fig. 1, the horizontal axis denotes the time, and the vertical axes denote the failure rate FR and the failure count FC, respectively.
The failure rate FR is shown as a so-called bathtub curve, i. e. with early failures in a region denoted with symbol 1, a constant rate of random failures in a region denoted with symbol 2, and an increasing failure rate in a region denoted with symbol 3. The intended lifetime L coincides with region 2. Accordingly, after an initial time in region 1 has passed, in which the failure count FC raised, the count FC of random failures in region 2 do typically not exceed 1% of the total number of capacitors used.
The lifetime diagram of Fig. 1 is valid for an electrolytic capacitor in operation. The deterioration over time is mainly dominated by the electrolyte leaking out of the encapsulation, i. e. the capacitor becoming dry. This type of deterioration will be referred to as “drying deterioration” in the following and is affected by the capacitor temperature. An example for a typical capacitor being operated at a constant voltage level and at a capacitor temperature of 45 °C is estimated to be greater than 70 years, e. g. 73 years or more.
In an application of a capacitor inside a delay circuit for a switch, such as in the present disclosure, the capacitor is non-operated, or essentially voltage-free, for very long periods of time in between subsequent switching operations, i. e. switching cycles. Typical average switching cycles are within the range of 1 hour or more, e. g. 6 hours for switches operating in or at hydro-storage plants, to several days or several weeks for disconnect switches of network segments or the like.
It was found out by the inventors of the present disclosure that a delay capacitor of a locking device for an electromechanically actuated switch, when the delay capacitor is not operated, or essentially voltage-free, the delay capacitor deteriorates according to a deterioration mechanism which is different from the above-described dry-out mechanism. In the following, this different deterioration mechanism will be referred to as “shelf deterioration”. The same is essentially true for a delay capacitor operated at a minimal voltage which is not within the range of its nominal, rated, or intended operating voltage. Estimations have shown that for a typical electrolytic delay capacitor, the estimated lifetime when the capacitor is subject to the different deterioration decreases to less than 30 years, e. g. 29 years.
According to an embodiment of the present disclosure, which is shown schematically in Figs. 2 and 3, a locking device 10 for an electromechanically actuated switch 100 comprises a locking element 20 being switchable at least into a lock position and an unlock position; and a delay circuit 30 providing a delay of a switching operation of the locking element 20.
The locking element 20 is exemplified by a locking pin in Figs. 2-3; however, the present disclosure is not limited thereto, and the locking element 20 may a locking claw or a locking element different from the examples given.
In Fig. 2, the locking element 20 is in an extended position or protruding position, which is the lock position of the exemplary locking element 20. The locking element 20 may be arranged such that in the lock position, it mechanically blocks the operation of a mechanical operation of a drive section of a switch (not shown in Figs. 2-3) equipped with the locking element 20.
In Fig. 3, the locking element 20 is in a retracted position, which is the unlock position of the exemplary locking element 20. In the unlock position, the mechanical operation of the drive section may be unblocked.
Although not shown in Figs. 2-3, the locking element 20 can be provided with a spring element (not shown) or the like which pushes the locking element 20 actively into the direction of the lock position as a safe fallback position. A solenoid 25 is arranged in the locking device 10 such that, when attracted, it retracts the locking element 20 into the unlock position of Fig. 3. When the solenoid 25 is released, the spring element pushes the locking element 20 back into the lock position.
The delay circuit 30 comprises a delay capacitor 31, which is only shown schematically. The delay capacitor 31 is, for example, part of an RC circuit having a time constant suitable for effectively preventing the locking element 20 to be pushed into the lock position prematurely. A premature fallback or push-back into the lock position would cause the locking element 20 to get into contact with an element of the drive section which is under movement, such that the locking element 20 would forcefully decelerate the movement of the drive section element, causing mechanical wear or even destruction.
In the embodiment shown in Figs. 2-3, the ohmic resistance of the solenoid 25 and the capacitance of the delay capacitor 31 form an RC circuit having a time constant of e. g. more than 200 milliseconds and less than 1 second or more than 500 milliseconds and less than 1 second. This delay may contribute to a holding time (non-release time after cutting of the supply voltage of the solenoid 25) which is sufficient to prevent a premature push-back of the locking element 20, e. g. a holding time of more than 1 second and less than 5 seconds or of more than 1 second and less than 10 seconds.
The voltage applied to the delay capacitor 31 for effecting the delay is an operating voltage of the delay capacitor 31. The operating voltage of the delay capacitor 31 may correspond to an operating voltage of the locking device 10 and is typically within a range of 30 to 95% of a rated voltage of the delay capacitor 31. A non-limiting example of the operating voltage of the locking device 10 is approximately 140 V. A switching cycle of the locking device of the present embodiment comprises an unlock time period in which the locking element is switched into the unlock position, and a lock time period in which the locking element is switched into the lock position. In the present embodiment, the locking device 10 comprises a control circuit 40 which is configured to control the operation of the delay circuit 30 in the idle mode depending on the switching cycle.
The duration of a typical unlock time period corresponds to the time constant of the RC circuit, i. e. it amounts to more than 1 second and less than 1 minute or to more than 1 second and less than 5 seconds or to more than 1 second and less than 10 seconds, for example. Those numbers are only to be understood as an example.
The duration of a typical lock time period is greater than 1 hour or 2 hours, or greater than 1 day. It may also be greater than 1 week, depending on the type of switch.
During the lock time period, according to the present embodiment, the delay circuit 30 operates in an idle mode. The delay circuit 30 is configured to apply an idling voltage to the delay capacitor 31. In the embodiment, the idling voltage is applied constantly throughout more than 80% or more than 90% of the lock time period. Preferentially, the idling voltage is applied essentially throughout the entire lock time period.
In the present embodiment, the idling voltage is within the range of the operating voltage of the delay capacitor 31 or within the range of the operating voltage of the locking device 10. In the non-limiting example given above, the operating voltage of the delay capacitor is within a range of approximately 70 V-133 V. In the present embodiment, a corresponding non-limiting example for the idling voltage is essentially within the same range, i. e. also within the range of approximately 70 V-133 V.
By applying the idling voltage, in particular by applying the idling voltage constantly throughout at least 80% or 90% of the lock time period, the delay capacitor 31 is “formed” to the idling voltage, which limits or eliminates the “shelf deterioration” process. Rather, the delay capacitor 31 will undergo a “drying deterioration” process. The operational lifetime of the delay capacitor 31 is prolonged considerably.
Fig. 4 is a schematic representation of a switch 100 comprising the locking device 10 of Figs. 2-3. The switch further comprises a drive section having a motor 111 and a drive 112 linked to the motor. The drive 112 translates the rotary movement of a rotor of the motor 111 into an appropriate movement for actuating a contact element 110. The contact element 110 is actuated upon a corresponding command issued by a control section (not shown) by means of the drive 112 and the motor 111.
In the switch 100 according to the embodiment, the locking element 20 of the locking device 10 is arranged such that in the unlock position shown in Fig. 4, the rotor of the motor 111 may operate freely, i. e. unhindered or unblocked by the locking element 20. In the lock position (shown in Fig. 2), the rotor of the motor 111 is blocked by the locking element 20.
Although the invention has been described on the basis of some preferred embodiments, those skilled in the art should appreciate that those embodiments should by no way limit the scope of the present invention. Without departing from the spirit and concept of the present invention, any variations and modifications to the embodiments should be within the apprehension of those with ordinary knowledge and skills in the art, and therefore fall in the scope of the present invention which is defined by the accompanied claims.

Claims (11)

PATENT AN SPRÜ CHEPATENT TO CHECK 1. Verriegelungsvorrichtung (10) fur einen elektromechanisch betätigten Schaker (100), umfassend: ein Verriegelungselement (20), das zumindest in eine Verriegelungsposition und in eine Entriegelungsposition umschaltbar ist; eine Verzögerungsschaltung (30), die eine Verzögerung eines Schaltvorganges des Verriegelungselements (20) zur Verftigung stellt, wobei die Verzögerungsschaltung (30) einen Verzögerungskondensator (31) zum Veranlassen der Verzögerung umfasst, wobei die Verzögerungsschaltung (30) dazu konfiguriert ist, dass wenn die Verzögerungsschaltung (30) in einem Leerlaufmodus betrieben wird, die Verzögerungsschaltung (30) eine Leerlaufspannung an den Verzögerungskondensator (31) anlegt.A locking device (10) for an electromechanically actuated shaker (100), comprising: a locking member (20) which is switchable to at least a locking position and an unlocking position; a delay circuit (30) providing a delay of a switching operation of the latch element (20), the delay circuit (30) comprising a delay capacitor (31) for causing the delay, the delay circuit (30) being configured such that when the Delay circuit (30) is operated in an idle mode, the delay circuit (30) applies an open circuit voltage to the delay capacitor (31). 2. Verriegelungsvorrichtung (10) nach Anspruch 1, wobei die Verzögerungsschaltung (30) dazu konfiguriert ist, die Leerlaufspannung konstant anzulegen, wenn die Verzögerungsschaltung (30) im Leerlaufmodus betrieben wird.The latch device (10) of claim 1, wherein the delay circuit (30) is configured to apply the open circuit voltage constantly when the delay circuit (30) is operated in the idle mode. 3. Verriegelungsvorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei die Leerlaufspannung mindestens 80%, typischerweise mindestens 90%, einer Betriebsspannung des Verzögerungskondensators (31) oder einer Betriebsspannung der Verriegelungsvorrichtung (30) beträgt.3. Locking device (10) according to any one of the preceding claims, wherein the open circuit voltage is at least 80%, typically at least 90%, an operating voltage of the delay capacitor (31) or an operating voltage of the locking device (30). 4. Verriegelungsvorrichtung (10) nach einem der vorhergehenden Ansprüche, die ferner eine Steuerungsschaltung (40) umfasst, die dazu konfiguriert ist, einen Betrieb der Verzögerungsschaltung (30) im Leerlaufmodus in Abhängigkeit von einem Schaltzyklus zu steuem, wobei ein Schaltzyklus einen Entriegelungszeitraum umfasst, während dessen das Verriegelungselement (20) in die Entriegelungsposition geschaltet ist, und einen Verriegelungszeitraum umfasst, während dessen das Verriegelungselement (20) in die Verriegelungsposition geschaltet ist.The latch apparatus (10) of any one of the preceding claims, further comprising a control circuit (40) configured to control operation of the delay circuit (30) in the idle mode in response to a switching cycle, a switching cycle comprising an unlock period; during which the locking element (20) is switched to the unlocking position, and a locking period during which the locking element (20) is switched to the locking position. 5. Verriegelungsvorrichtung (10) nach Anspruch 4, wobei die Steuerungsschaltung (40) dazu konfiguriert ist, den Leerlaufmodus der Verzögerungsschaltung (30) während mindestens 80%, typischerweise während mindestens 90% des Verriegelungszeitraums zu betreiben, typischerweise eines jeden Verriegelungszeitraums.The latch device (10) of claim 4, wherein the control circuit (40) is configured to operate the idle mode of the delay circuit (30) for at least 80%, typically for at least 90% of the lock period, typically of each lock period. 6. Verriegelungsvorrichtung (10) nach Anspruch 4 oder 5, wobei ein durchschnittlicher Schaltzyklus größer als 1 Stunde oder 2 Stunden, typischerweise größer als 1 Tag ist.A locking device (10) according to claim 4 or 5, wherein an average switching cycle is greater than 1 hour or 2 hours, typically greater than 1 day. 7. Verriegelungsvorrichtung (10) nach einem der Ansprüche 4-6, wobei der Entriegelungszeitraum eines Schaltzyklusses weniger als 1 Minute, typischerweise weniger als 10 Sekunden oder weniger als 5 Sekunden beträgt.7. Locking device (10) according to any one of claims 4-6, wherein the unlocking period of a switching cycle is less than 1 minute, typically less than 10 seconds or less than 5 seconds. 8. Verriegelungsvorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei das Verriegelungselement (20) ein mechanisches Verriegelungselement umfasst, typischerweise eine Verriegelungsklaue oder einen Verriegelungsstift.8. Locking device (10) according to one of the preceding claims, wherein the locking element (20) comprises a mechanical locking element, typically a locking claw or a locking pin. 9. Verriegelungsvorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei die Verriegelungsvorrichtung (10) einen Elektromagneten (25) zum Betätigen des mechanischen Verriegelungselements umfasst.9. Locking device (10) according to any one of the preceding claims, wherein the locking device (10) comprises an electromagnet (25) for actuating the mechanical locking element. 10. Verriegelungsvorrichtung (10) nach Anspruch 9, wobei der Elektromagnet (25) und der Verzögerungskondensator (31) eine RC-Schaltung bilden.10. Locking device (10) according to claim 9, wherein the electromagnet (25) and the delay capacitor (31) form an RC circuit. 11. Schalier (100), umfassend: ein mechanisch betätigbares Kontaktelement (110); einen elektromechanischen Antriebsabschnitt (111, 112), der dazu angeordnet ist, das Kontaktelement (110) zu betätigen; eine Verriegelungsvorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei das Verriegelungselement (20) der Verriegelungseinrichtung (10) so angeordnet ist, dass es in der Verriegelungsposition die mechanische Betätigung des Antriebsabschnittes (111, 112) verriegelt.11. A shaver (100) comprising: a mechanically operable contact element (110); an electromechanical drive section (111, 112) arranged to actuate the contact element (110); a locking device (10) according to any one of the preceding claims, wherein the locking element (20) of the locking device (10) is arranged to lock the mechanical actuation of the drive section (111, 112) in the locking position.
LU100027A 2017-01-25 2017-01-25 Locking device for an electromechanically actuated switch and switch comprising locking device LU100027B1 (en)

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US20070156181A1 (en) * 2005-12-30 2007-07-05 Norton John D Method of maintaining wet-tantalum electrolytic capacitors
US20080110732A1 (en) * 2004-12-23 2008-05-15 Robert Adunka Method and Device for the Secure Operation of a Switching Device
US20150188595A1 (en) * 2013-12-26 2015-07-02 Motorola Mobility Llc Maintaining a capacitor dielectric under strain to reduce capacitance variation due to time variant hysterisis effect

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1127209A (en) * 1965-07-17 1968-09-18 Schiele Verwaltungs Gmbh Delayed return electronic relay
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