EP1986203A1 - Procédé pour détecter une couche d'isolement de contact dans un élément de commutation ayant des contacts et un commutateur ayant un tel élément de commutation - Google Patents

Procédé pour détecter une couche d'isolement de contact dans un élément de commutation ayant des contacts et un commutateur ayant un tel élément de commutation Download PDF

Info

Publication number
EP1986203A1
EP1986203A1 EP07008554A EP07008554A EP1986203A1 EP 1986203 A1 EP1986203 A1 EP 1986203A1 EP 07008554 A EP07008554 A EP 07008554A EP 07008554 A EP07008554 A EP 07008554A EP 1986203 A1 EP1986203 A1 EP 1986203A1
Authority
EP
European Patent Office
Prior art keywords
voltage
switching
contact
switching device
switching element
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.)
Withdrawn
Application number
EP07008554A
Other languages
German (de)
English (en)
Inventor
Frank Dr. Kalvelage
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP07008554A priority Critical patent/EP1986203A1/fr
Publication of EP1986203A1 publication Critical patent/EP1986203A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/0015—Means for testing or for inspecting contacts, e.g. wear indicator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/60—Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces
    • H01H1/605—Cleaning of contact-making surfaces by relatively high voltage pulses

Definitions

  • the invention relates to a method for detecting the presence of a Greisolier für in a contact-type switching element.
  • the invention further relates to a switching device which has an input-side terminal for connecting a switching voltage, an output-side terminal for connecting an electrical load, an interposed switched contact switching element and a control unit with means for driving the switching element to a control signal.
  • An electrical low-voltage switchgear such as a contactor or a circuit breaker, has for switching a contact-type switching element or in multi-pole case, a plurality of contact-type switching elements.
  • a switching element has so-called main contacts, which can be controlled by one or more control magnets.
  • the main contacts consist of a movable contact bridge and fixed contact pieces, to which a switching voltage and an electrical load are connected.
  • a corresponding on or off signal is output to the control magnets, which then act on the main contacts.
  • contact surfaces are made of materials such as a silver alloy. They are at this Placed on both the contact bridge and the contact pieces and have a certain thickness.
  • Such an insulating layer is formed with an increasing number of switching cycles.
  • the insulating layer may also form on non-switching contacts, e.g. by oxidation. Associated with this is an increase in the contact contact resistance between the switching contacts. In the worst case, this can lead to complete contact isolation. This corresponds to an interruption of the current flow.
  • the device comprises, in addition to the usual means for detecting and converting the switch position and the transmission means and evaluation means special means for removing an oxidation layer, which is formed for example by weathering on the contacts of the switch.
  • These means preferably comprise a switch and a control logic.
  • the drive logic closes the switch each time the switch is closed for a certain amount of time. As a result, a relatively high current flows through the contacts of the switch for a short time, and the oxidation layer is effectively removed.
  • the object of the invention is achieved by a method having the features of claim 1.
  • Advantageous embodiments of the method are given in the dependent claims 2 to 15.
  • a suitable switching device is called.
  • advantageous embodiments of the switching device are mentioned.
  • the method according to the invention serves for determining the presence of a contact insulation layer in the case of a contact-type switching element.
  • the switching element is connected on the input side with a switching voltage and the output side with an electrical load. It is measured for a variety of switching cycles, at least within an expected switch-on time of the switching element, a voltage applied across the closed switching element contact voltage.
  • a first warning message is issued if a currently measured value of the contact voltage exceeds a predetermined lower minimum voltage value.
  • the measured values for the contact voltage determined by the method according to the invention are particularly representative when the switching voltage and the electrical load are constant. This is the case in most operational applications. However, the measured values can also be determined independently of whether the electrical load is constant or not, since the contact voltage to be determined ultimately only depends on the resistance of the contact itself.
  • the predetermined lower minimum voltage value is approximately two to five times the value, which results for the contact voltage in the new state of the switching element.
  • the contact resistance is typically in the range of 0.1 ohms or even less.
  • the corresponding contact voltage is correspondingly low. It is less than 1 V for switching currents of a few amperes.
  • an arc ionization voltage value dependent on the contact material used is predetermined. This voltage value is a multiple of the lower minimum voltage value.
  • the first warning message is issued only when a currently measured value of the contact voltage is within the range of the predetermined arc ionization voltage value.
  • the arc ionization voltage is about 12 V. It can be used for other contact materials, e.g. for gold or platinum, also below or above.
  • the output according to the invention first warning message indicates that the switching element is functional only for a predefinable or combinrechenbare number of switching cycles.
  • the end of life of the switching element is caused by two different effects.
  • no contact can be made before the contact material is completely applied.
  • the contacts are insulating.
  • opening the contacts can no longer be possible if the contact material has been used up.
  • the contacts are welded together. This may result in burning off the non-contacting contacts of the other phases.
  • a spontaneous sporadic increase of the contact resistance is effected, while in the second case, the contact resistance is substantially constant, but can certainly increase further.
  • a predefinable free-burning current can be impressed via the switching element within the switch-on time, so that an existing contact insulating layer is at least partially removed. This is particularly advantageous if during the new phase of the switching element sporadically higher contact voltages are measured, which are above the lower minimum voltage.
  • Such sporadic outliers can have their cause, for example, in insulating microparticles, which dissolve in the region of the switch contacts or are present in the ambient air of the switching contacts. The latter can be dust particles, for example.
  • the burn-off contact burns off the switch contact.
  • the current intensity for this is usually a multiple of the rated current for the switching element.
  • the freewheeling current is only present for fractions of a second, this does not damage the switching contacts.
  • the contact voltage is typically again in the range of the previous contact voltages.
  • a second warning message can be output.
  • a limited number of further attempts at free-burning can be started.
  • the second warning message can be an indication that there is a permanent impairment of the switching contacts.
  • a third warning message can be issued if a second number of cycles calculated at the end of the service life is reached.
  • the determination of the second number can be done on the basis of a field test of a switching device type, for example. It is to be expected that the switching contacts of the tested switching elements of a switching device type achieve a high-impedance final state of the switching elements at approximately the same second number of switching cycles. The transition from a switching contact with insulating layer to a high-resistance or insulated switching contact also takes place comparatively abruptly. The reason for this is that the applied switching voltage is now no longer sufficient to the further grown insulating layer break through. In fact, the switching voltage is measured via the supposedly closed switching contact.
  • the second number of switching cycles may correspond to 0.5 to 0.7 times the first number of switching cycles.
  • the above values can be considered as empirical values. They can also be above or below, depending on the type of switch element.
  • a fourth warning message is issued when the currently measured value of the contact voltage exceeds a predetermined upper minimum voltage value, which indicates the failure of the switching element.
  • This warning message may e.g. be read in and evaluated by a higher-level monitoring or control center. As a result, an exchange of the respective switching element or the switching device can be made.
  • the upper minimum voltage value corresponds approximately to 0.7 to 0.9 times the switching voltage.
  • the further switching operation of the switching element is disabled when the upper minimum voltage has been exceeded. This is particularly advantageous for safety-relevant applications.
  • the contact voltage is measured several times within the respective turn-on time. An average value is formed from the corresponding measured values. This increases the accuracy of a measurement of the contact voltage. In addition, metrological outliers can be filtered out.
  • a maximum time duration of 0.3 s is assumed for the expected switch-on time of the switching element. This is the time it takes for the switching voltage at the output to reach the switching voltage under normal operating conditions.
  • the switch-on time can also be over how eg 1 s. It can also be lower, such as at 0.2 s. Decisive for the expected turn-on time are inductances in the supply of the switching voltage to the switching element.
  • the switching voltage is a DC voltage.
  • the switching voltage may be an alternating voltage.
  • the contact voltage to be determined is then measured in the voltage maximum during the switch-on time.
  • the contact voltage can be determined according to a further embodiment for a plurality, in particular for three switching elements of a multi-pole, in particular three-pole switching device.
  • the output of the warning messages or the impressing of an external freewheeling current takes place for each of the switching elements in an analogous manner. It is also possible to combine pole-by-pole warning messages and to output a single warning message as soon as one of the switching elements meets the requirements.
  • the object of the invention is further achieved by a switching device which has a parallel to the switching element connected voltage measuring unit for detecting a contact voltage.
  • the switching device has a control unit with means for evaluating the detected contact voltage, with means for outputting warning messages and with means for carrying out the method according to the invention.
  • the control unit is typically a microcontroller or a microcomputer.
  • the same microcontroller can be used to evaluate a measured switching voltage, which is also used to control the switching device.
  • the switching device has means for impressing a predetermined freewheeling current within the switch-on time of the switching element.
  • the means may, for example, be a series circuit of one compared to Load low-impedance resistor and an electronic switching element, such as a switching transistor to be.
  • the series connection is connected in parallel to the load.
  • the electronic switching element can then be turned on.
  • a stored voltage such as by means of a capacitor, can be used as a switching voltage for burnout.
  • the switching device is designed in particular for switching a DC voltage as a switching voltage. It may alternatively or additionally be designed as a switching voltage for switching an AC voltage.
  • the switching device is a multi-pole switching device. It has a plurality of contact-type switching elements, in particular three switching elements. In addition, the switching device has an adapted for multi-pole operation control unit.
  • the switching device is typically a low-voltage switching device, in particular a contactor or circuit breaker.
  • the voltages to be switched can be up to 72 V. In some cases, they can also be above it.
  • the currents to be switched are typically in the one or two-digit range.
  • the voltages to be switched are preferably at most 400V.
  • the voltages may also be in the one or two digit range, e.g. at 5V or 24V.
  • the switching device can be a high-voltage switching device, in particular a high-voltage switch.
  • the voltages to be switched are preferably at least 5000 V.
  • the voltages can also be in a two- or three-digit kilovolt range.
  • the switching device may be a medium-voltage switching device, in particular a medium-voltage switch.
  • the voltages to be switched in a range of 400 V to 5000 V.
  • FIG. 1 shows, by way of example, a contact-type switching element 1 connected between a switching voltage UC and an electrical load 4.
  • the reference numeral 5 denotes an internal resistance of the (ideal) voltage source UQ.
  • the internal resistance 5 reduces the available switching voltage US as a function of a load current IS.
  • the switching element 1 is shown in the middle part of the FIG. 1 . It is composed of an ideal switch 2 and a contact resistance 3 connected in series with it. As a function of the load current IS and as a function of a currently present contact resistance value, a corresponding contact voltage UC drops across the contact resistance 3.
  • FIG. 2 shows, by way of example, the voltage curve VUS, VUC of a switching voltage US connected to the electrical load and an associated contact voltage UC applied via a new-value switching contact of the switching element 1.
  • VUS voltage curve
  • VUC voltage curve
  • UC contact voltage
  • the upper voltage curve VUS shows the time increase of a switching voltage US acting as output voltage UA at the output of the switching element 1.
  • t0 is a switch-on time
  • t1 denotes a stationary time from which the switching voltage US reaches its maximum value USM.
  • the maximum value USM has a constant voltage value assuming a constant electrical load 4. The voltage value is reduced at least by the voltage drop across the internal resistance 5 of the voltage source UQ.
  • FIG. 3 shows by way of example the voltage curve VUC of a switching element 1 with an insulating layer on the switching contacts.
  • the contact voltage UC rises at the time t0 with a comparison with FIG. 2 much greater slew rate due to a much higher contact resistance value in the presence of a contact insulation layer.
  • the voltage waveform points designated P1-P4 voltage dips occur, forming one arc LB each.
  • TW denotes an expected switch-on time, within which a safe switch-on of the load 4 is to be expected. It is for example 0.3 s.
  • the contact voltage UC is in the range of an arc ionization voltage value UI. This is for the example of the FIG. 3 used contact material approx. 12 V.
  • the end of life of the switching element 1 is reached.
  • the switching element 1 is to be replaced, especially since the voltage UA available at the output of the switching element 1 is significantly reduced by the arc ionization voltage UI present across the switching contact.
  • the heat development in the region of the switching contact is very high.
  • FIG. 4 shows by way of example the voltage curve VUC of a switching element 1 with insulating, non-functional switching contacts. There is no appreciable flow of current through the load 4 more. In this case, the rising speed of the contact voltage UC is maximum. In the stationary state is above the switching contact a maximum Switching voltage value USM, which corresponds to the voltage value of the source voltage US in this currentless case.
  • FIG. 5 shows by way of example the method steps S1-S6 of the method according to the invention.
  • S1 denotes the start of the method according to the invention for determining the presence of a contact insulation layer in the case of a contact-type switching element 1.
  • step S2 at least within an expected switch-on time TW of the switching element 1 for a plurality of switching cycles, a contact voltage UC applied across the closed switching element 1 is measured.
  • step S3 a branch is made to a step S4 and a first warning message is output if a currently measured value of the contact voltage UC exceeds a predetermined minimum minimum voltage value UN.
  • step S5 the next turn-on operation is awaited to measure the plurality of switching cycles.
  • Step S6 designates the end of the flowchart according to the method according to the invention.
  • the predetermined lower minimum voltage value UN is approximately two to five times the value which results for the contact voltage UC in the new state of the switching element 1.
  • this is in the example of the FIG. 3 a drawn to the lower minimum voltage value UN line drawn.
  • the first warning message can also be output only when a currently measured value of the contact voltage UC is in the range of the predetermined arc ionization voltage value UI.
  • the arc ionization voltage value UI is a value dependent on the contact material used. It is usually a multiple of the lower minimum voltage value UN.
  • the short-term applied freewheeling current a multiple of the maximum possible load current, that is, the rated current, for the switching element 1 on.
  • the freewheeling current may e.g. which is 10 times the rated current.
  • the freewheeling current can alternatively be impressed via the switching element 1 for a predetermined number of subsequent switching cycles.
  • the number may e.g. in a range of two to five.
  • a second warning message can also be issued if the specified minimum voltage value UN is not fallen below after attempting to burn off again.
  • the second warning message indicates an unexpected state of the switching contacts.
  • a first number of switching cycles can be determined until the contact voltage UC exceeds the lower minimum voltage value UN or the arc ionization voltage value UI.
  • a third warning message can then be issued if a second number of switching cycles extrapolated to the end of life is reached.
  • the second number of switching cycles may be 0.5 to 0.7 times the first number of switching cycles.
  • the determination of the second number of switching cycles is based on empirical considerations, e.g. from the results of a field test, wherein a plurality of load circuits are performed over a plurality of days and with respect to the respective type of the switching element 1.
  • the third warning message indicates that shortly with the failure of the switching element 1 and the switching device with such a switching element 1 is to be expected.
  • a fourth warning message can be output when the currently measured value of the contact voltage UC exceeds a predetermined upper minimum voltage value UH, which indicates the failure of the switching element 1.
  • the upper minimum voltage value UH may correspond, for example, approximately 0.7 to 0.9 times the switching voltage US.
  • a line belonging to the upper minimum voltage value UH is shown.
  • the further switching operation of the switching element 1 can be blocked when the upper minimum voltage UH is exceeded in order to prevent a possible faulty behavior of loads to be switched and the plant components connected thereto. Blocking is usually mandatory for safety-relevant applications.
  • the contact voltage UC can be measured several times within the respective expected switch-on time TW and a mean value can be formed from the corresponding measured values to increase the reliability of the warning messages to be output.
  • the expected on-time TW of the switching element 1 can be assumed to be a maximum period of 0.3 s. It can also be above or below depending on the type of switching element used. In particular, the expected switching time increases with the level of the switching voltage and the load current.
  • FIG. 6 shows by way of example the profile VR of a contact resistance value R over the service life of a switching element 1.
  • the timing of the switching operations is given in days.
  • the field trial conducted on five examinees took place over a period of approx. 150 days.
  • contact resistance measured values MW of the five test specimens are entered in logarithmic representation over the time axis t.
  • VR of the contact resistance value RC two significant stages are recognizable which determine three phases PH1-PH3 of the "lifetime" of a switching element 1 in terms of time.
  • the first phase PH1 denotes a new or operating phase of the switching element 1.
  • the switching element 1 has within this phase PH1, that is, from the start of the field test until about the 80th Day, comparatively low contact resistance values RC for all the samples.
  • the measured contact resistance values RC are below a predetermined lower resistance limit RN, which in relation to the FIG. 2 to FIG. 4 with the local lower minimum voltage UN corresponds.
  • AR outliers in contact resistance value RC are indicated, which are above the lower resistance limit RN.
  • a burnout attempt can be made, thereby eliminating sporadic contamination of the switch contacts.
  • the second phase PH2 extends from the 80th day to the 135th day. Although the end of life of the switching element 1 is reached within this phase PH2, the switching element 1 is still functional until about the 135th day.
  • the one or more switching contacts of the switching element 1 are now covered with a continuous insulating layer which can be broken when the switching voltage US from a certain voltage value.
  • a value corresponding to the arc ionization voltage value UI is FIG. 3 corresponding arc ionization resistance limit specified.
  • the third phase PH3 corresponds to the failure of the switching element 1.
  • the switching contacts are insulating.
  • the contact resistance values RC associated with the respective measured values MW are orders of magnitude higher than those of the two first phases PH1 and PH2.
  • FIG. 7 shows a switching device 10 with, for example, a switching element 1 and with a control unit 6 for carrying out the method according to the invention.
  • the switching device 10 has an input-side terminal for connecting a switching voltage US and an output-side terminal for connecting an electrical load 4. In between, a contact-type switching element 1 is connected, symbolized by an ideal switch 2 and a contact resistance 3 connected in series with it.
  • a voltage measuring unit 7 for detecting a contact voltage UC is connected in parallel to the switching element 1.
  • a control unit 6 has means for evaluating the detected contact voltage UC. It also has means for issuing warning messages MSG1-MSG4 and means for carrying out the method according to the invention.
  • the control unit 6 has an input-side terminal for detecting a control voltage UE. This can e.g. be a digital voltage value.
  • the control unit 6 controls the switching element 1 as a function of the control voltage UE by means of a control signal ST.
  • the control signal ST is used to supply a control magnet or actuator, which ultimately actuates the switch contacts or the main contacts of the switching element 1.
  • control unit 6 has outputs for outputting the warning messages MSG1-MSG4.
  • the warning messages MSG1-MSG4 can be output in the form of digital signals and optionally trigger a light source, such as an LED, for displaying the corresponding warning.
  • a light source such as an LED
  • the warning messages MSG1-MSG4 can be provided as a bus signal at the output of the control unit 6.
  • the control unit 6 is in particular a microcontroller, microprocessor or a microcomputer.
  • FIG. 7 has the switching device 10 means 8, 9 for impressing a predetermined freewheeling current IF during the expected switch-on time TW of the switching element 1 on.
  • the switch-on duration of the freewheeling current IF is in particular shorter than the expected switch-on time TW.
  • the switching device 10 shown is designed to switch a DC voltage as a switching voltage US.
  • the switching device 10 may alternatively or additionally be designed as a switching voltage US for switching an AC voltage.
  • the switching device 10 may be a multi-pole switching device having a plurality of contact-type switching elements 1.
  • the switching device 10 is a three-pole switching device for switching three-pole loads.
  • the three-pole arrangement of switching elements 1 is particularly common for switching three-pole loads in a 400V / 50Hz three-phase network.
  • control unit 10 in a three-phase switching voltage in the AC voltage case or in the case of three-phase current adapted for multi-pole operation control unit 6.
  • the switching device 10 is a low-voltage switching device, in particular a contactor or circuit breaker.
  • the voltages to be switched are preferably maximum 400V.
  • the voltages can also be in the one- or two-digit range, such as at 5 V or 72 V.
  • the switching device 10 may be a high-voltage switching device, in particular a high-voltage switch.
  • the voltages to be switched are preferably at least 5000 V.
  • the voltages can also be in a two- or three-digit kilovolt range.
  • the switching device 10 may be a medium-voltage switching device, in particular a medium-voltage switch.
  • the voltages to be switched are in a range of 400 V to 5000 V.

Landscapes

  • Keying Circuit Devices (AREA)
EP07008554A 2007-04-26 2007-04-26 Procédé pour détecter une couche d'isolement de contact dans un élément de commutation ayant des contacts et un commutateur ayant un tel élément de commutation Withdrawn EP1986203A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07008554A EP1986203A1 (fr) 2007-04-26 2007-04-26 Procédé pour détecter une couche d'isolement de contact dans un élément de commutation ayant des contacts et un commutateur ayant un tel élément de commutation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07008554A EP1986203A1 (fr) 2007-04-26 2007-04-26 Procédé pour détecter une couche d'isolement de contact dans un élément de commutation ayant des contacts et un commutateur ayant un tel élément de commutation

Publications (1)

Publication Number Publication Date
EP1986203A1 true EP1986203A1 (fr) 2008-10-29

Family

ID=38482228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07008554A Withdrawn EP1986203A1 (fr) 2007-04-26 2007-04-26 Procédé pour détecter une couche d'isolement de contact dans un élément de commutation ayant des contacts et un commutateur ayant un tel élément de commutation

Country Status (1)

Country Link
EP (1) EP1986203A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010001129A1 (de) * 2010-01-22 2011-07-28 Tyco Electronics AMP GmbH, 64625 Leitungsschutzanordnung
WO2013174558A3 (fr) * 2012-05-21 2014-07-10 Robert Bosch Gmbh Convertisseur pour machine électrique
WO2016010565A1 (fr) * 2014-07-18 2016-01-21 Ge Intelligent Platforms, Inc. Entrée à contact universel prenant en charge un courant de mouillage programmable
DE102016120130B4 (de) 2015-10-27 2019-09-19 Fanuc Corporation Laststeuervorrichtung, die Kontaktfehler bei Relais-Kontakten verhindert

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0387672A (ja) * 1989-08-31 1991-04-12 Toshiba Corp 接点の診断装置
DE4318188A1 (de) 1993-06-01 1994-12-08 Abb Management Ag Vorrichtung zur Überwachung einer Schalterstellung
WO2000039823A1 (fr) * 1998-12-28 2000-07-06 General Electric Company Procede de determination d"une usure de contact dans une unite de declenchement
DE10051161C1 (de) * 2000-10-16 2002-03-07 Siemens Ag Verfahren und Vorrichtung zur Reduzierung des Kontaktabbrandes eines Schaltgerätes
DE102006042768A1 (de) 2005-09-15 2007-03-29 Siemens Ag Verfahren zum Betreiben eines elektrischen Schutzschalters und nach diesem Verfahren betriebener elektrischer Schutzschalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0387672A (ja) * 1989-08-31 1991-04-12 Toshiba Corp 接点の診断装置
DE4318188A1 (de) 1993-06-01 1994-12-08 Abb Management Ag Vorrichtung zur Überwachung einer Schalterstellung
WO2000039823A1 (fr) * 1998-12-28 2000-07-06 General Electric Company Procede de determination d"une usure de contact dans une unite de declenchement
DE10051161C1 (de) * 2000-10-16 2002-03-07 Siemens Ag Verfahren und Vorrichtung zur Reduzierung des Kontaktabbrandes eines Schaltgerätes
DE102006042768A1 (de) 2005-09-15 2007-03-29 Siemens Ag Verfahren zum Betreiben eines elektrischen Schutzschalters und nach diesem Verfahren betriebener elektrischer Schutzschalter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010001129A1 (de) * 2010-01-22 2011-07-28 Tyco Electronics AMP GmbH, 64625 Leitungsschutzanordnung
WO2013174558A3 (fr) * 2012-05-21 2014-07-10 Robert Bosch Gmbh Convertisseur pour machine électrique
US9515584B2 (en) 2012-05-21 2016-12-06 Robert Bosch Gmbh Converter for an electric motor
WO2016010565A1 (fr) * 2014-07-18 2016-01-21 Ge Intelligent Platforms, Inc. Entrée à contact universel prenant en charge un courant de mouillage programmable
US10217573B2 (en) 2014-07-18 2019-02-26 Ge Intelligent Platforms, Inc. Universal contact input supporting programmable wetting current
DE102016120130B4 (de) 2015-10-27 2019-09-19 Fanuc Corporation Laststeuervorrichtung, die Kontaktfehler bei Relais-Kontakten verhindert

Similar Documents

Publication Publication Date Title
DE112012001189B4 (de) Verfahren, Systeme und Einrichtungen zum Erkennen paralleler elektrischer Fehlerlichtbögen
EP2418748B1 (fr) Dispositif d'alimentation en énergie
DE112016002719T5 (de) Treiber-steuerungsschaltung für leistungshalbleiter-element
EP1192697B1 (fr) Procede permettant d'empecher un enclenchement sur des courts-circuits electriques existant dans des branches et dispositif correspondant
EP3518263B1 (fr) Disjoncteur de protection basse tension
DE102014200946B4 (de) Überlast-Überwachungsvorrichtung und Verfahren zur Überlast-Überwachung
DE102016107598B3 (de) Vorrichtung und verfahren zum überwachen eines hochvolt-schützes in einem fahrzeug
EP3510617B1 (fr) Disjoncteur
DE102019119975B3 (de) Intelligenter elektronischer schalter
DE102019121795B4 (de) Intelligenter elektronischer schalter
DE102005051762A1 (de) Vorrichtung zum steuerbaren Herstellen einer Schaltverbindung
DE102018118329B3 (de) Verfahren zum Nullpunktschalten eines Relais sowie Relaisschaltung
DE102017101451A1 (de) Niederspannungs-Schutzschaltgerät
EP3748794A1 (fr) Protection électronique pour une alimentation électrique
EP1986203A1 (fr) Procédé pour détecter une couche d'isolement de contact dans un élément de commutation ayant des contacts et un commutateur ayant un tel élément de commutation
EP4091184B1 (fr) Dispositif et procédé de disjoncteur
EP2546852B1 (fr) Relais de sécurité bistable
EP3574516B1 (fr) Disjoncteur basse tension
DE102013012578A1 (de) Vorrichtung zum Absichern einer elektrischen Leitung
EP1327254B1 (fr) Procede et dispositif pour reduire l'usure des contacts d'un appareil de coupure
EP1733470B1 (fr) Dispositif de commutation servant a faire fonctionner un moteur, et procede correspondant
EP1755135A2 (fr) Circuit électrique pour la collection et l'évaluation des variables mesurées électriques et physiques dans un interrupteur électrique
DE102010031061A1 (de) Schutz eines Strompfades und Diagnose des Alterungszustandes
EP0866480A2 (fr) Circuit pour l'alimentation d'une charge dans un circuit électrique
EP3175251B1 (fr) Circuit comprenant un appareil de commande présentant au moins une entrée binaire et procédé de fonctionnement associé

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

17P Request for examination filed

Effective date: 20090309

17Q First examination report despatched

Effective date: 20090417

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20101101