EP3492851B1 - Procédé de surveillance et dispositif de surveillance pour isolations électriques d'un four électrique industriel ainsi que four électrique industriel - Google Patents

Procédé de surveillance et dispositif de surveillance pour isolations électriques d'un four électrique industriel ainsi que four électrique industriel Download PDF

Info

Publication number
EP3492851B1
EP3492851B1 EP18208652.0A EP18208652A EP3492851B1 EP 3492851 B1 EP3492851 B1 EP 3492851B1 EP 18208652 A EP18208652 A EP 18208652A EP 3492851 B1 EP3492851 B1 EP 3492851B1
Authority
EP
European Patent Office
Prior art keywords
monitoring device
electric furnace
industrial electric
insulation
measuring points
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.)
Active
Application number
EP18208652.0A
Other languages
German (de)
English (en)
Other versions
EP3492851A1 (fr
Inventor
Volker von Oldenburg
Michael van den Heuvel
Mesut Göcoglu
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP3492851A1 publication Critical patent/EP3492851A1/fr
Application granted granted Critical
Publication of EP3492851B1 publication Critical patent/EP3492851B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/20—Arrangement of controlling, monitoring, alarm or like devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system

Definitions

  • the present invention relates to a monitoring method and a monitoring device for electrical insulation of an industrial electric furnace, in particular a reduction furnace, according to the preamble of independent claims 1 and 6, respectively.
  • the invention also relates to an industrial electric furnace according to claim 7.
  • Industrial electric furnaces are used in particular for melting metals and metal mixtures.
  • the energy required to heat the melted material is supplied to such industrial electric furnaces as electrical energy via live system parts, such as cables and electrodes.
  • live system parts must be electrically insulated from voltage-free and/or grounded system parts by means of electrical insulation installed between the system parts.
  • electrical insulation is also required between live system parts of different phases.
  • voltage flashovers, arcs and spark erosion processes can occur between the system components, such as electrodes, furnace vessel and furnace lid, which affects the service life and operational safety of an industrial electric furnace.
  • the induction furnace has an induction coil, on the outside of which there are yokes spaced apart from one another in the coil circumferential direction, which are pressed against the coil by means of clamping devices supported on the outer furnace frame, with electrical coil-yoke insulation being located between each yoke and the coil, with each Individual yoke detects a change in its electrical insulation state in relation to the induction coil and / or the earth potential independently of the other yokes and then the localization of an impending or existing damage in the coil-yoke insulation is carried out.
  • an insulation monitoring of an electrical heating circuit for a melting furnace and a corresponding method are further disclosed, with a voltage divider and a voltage monitoring being provided for the voltage divider.
  • the voltage divider is connected in parallel to a power supply for the heating circuit, the voltage monitoring having a first measuring device and a second measuring device, a first measuring signal from the first measuring device and a second measuring signal from the second measuring device being evaluated in an evaluation device become.
  • the present invention is therefore based on the object of providing a method and a corresponding device for the improved monitoring and checking of the electrical insulation of an industrial electric furnace compared to the prior art.
  • the monitoring and checking of the electrical insulation should be carried out faster and more conveniently than before and at the same time with less effort, so that downtimes and the personnel required for the maintenance of industrial electric furnaces are reduced.
  • the present invention is intended to provide an industrial electric furnace whose electrical insulation can be monitored and checked with little effort, so that the operational reliability of the industrial electric furnace can be increased and downtimes can be minimized.
  • the object of the present invention is achieved by a monitoring method with the features of claim 1, a monitoring device with the features of claim 6 and by an industrial electric furnace with the features of claim 7.
  • Advantageous further developments result from the features of the dependent claims, which can be combined in any way.
  • the invention is based on the finding that the object of the invention is achieved in that the electrical insulation of an industrial electric furnace is continuously and automatically monitored and checked with regard to its insulating properties during the production operation of the industrial electric furnace by means of an appropriately designed monitoring device.
  • the electrical insulation is not checked manually while the industrial electric furnace is at a standstill, as was previously the case, but rather automatically by a monitoring device during production operation, i.e. when the electric furnace converts the electrical energy supplied to it into heat energy during ongoing operation, for example to melt a melt.
  • such an industrial electric furnace may be, for example, a reduction furnace, electric melting furnace, ladle furnace, induction furnace or electric arc furnace.
  • the industrial electric furnace is provided with predetermined measuring points which are arranged on several sections of the electric furnace that are electrically insulated from one another.
  • the predetermined measuring points can be arranged, for example, on electrodes, the ground, a charging tube, segments of a furnace vessel and segments of a furnace lid in such a way that a voltage potential applied to the system part or section of the industrial electric furnace can be tapped or measured at the associated measuring point.
  • each of these two sections must have a respective measuring point.
  • a respective measuring point can be located at any location in the respective section.
  • the industrial electric furnace to be monitored by the monitoring method and the monitoring device presented preferably has a large number of electrical insulation and thus also a correspondingly large number of predetermined measuring points.
  • the method presented provides that the monitoring device during the production operation of the industrial electric furnace in a respective test run automatically, i.e. independently and without instigation or triggering by the operating personnel of the industrial electric furnace, determines measured resistance values of the electrical insulation between predetermined measuring points provided on the sections of the electric furnace .
  • the monitoring device can measure the resistance measurement value independently and / or can receive the resistance measurement value from an insulation measuring device that is connected to the monitoring device electrically and / or via a data interface is.
  • a conventional insulation measuring device can be used as an insulation measuring device, which measures the insulation resistance in accordance with established regulations carries out testing standards or legal requirements and can have corresponding certification from a testing organization.
  • the method presented further provides that the checking device checks the insulating properties of the electrical insulation, which are arranged between the sections of the electric furnace provided with the predetermined measuring points, based on the determined resistance measurements. During this check, the resistance measurement value determined for an electrical insulation to be checked can be compared with a general or insulation-specific reference value or target value. If the determined resistance measurement value falls below the specified reference value, the monitoring device evaluates the associated electrical insulation as defective or worthy of replacement and sends a corresponding message to a storage device or signaling device for operating or maintenance personnel of the industrial electric furnace.
  • the method presented further provides that the monitoring device temporarily electrically connects the predetermined measuring points to an insulation measuring device in a respective test run according to a predetermined sequence, and the insulation measuring device measures the resistance values between the measuring points connected to the insulation measuring device.
  • the monitoring device preferably temporarily connects the predetermined measuring points in pairs to the insulation measuring device at a measuring time, so that the insulation measuring device can measure the ohmic resistance between a pair of measuring points and transmit it to the monitoring device.
  • the monitoring device successively connects all possible pairs of measuring points arranged on spatially adjacent system parts or sections of the electric furnace with the insulation measuring device, so that the insulation measuring device can successively measure the respective resistance measurements between the measuring points connected in pairs to the insulation measuring device in a respective test run and transmit them to the monitoring device .
  • the monitoring device According to this development, it is provided with the function of a switching logic or multiplexing device between the specified measuring points.
  • the presented method enables quick and low-cost monitoring of the electrical insulation of an industrial electric furnace. Since the presented method is carried out during ongoing operation of the electric furnace, the downtimes of the electric furnace planned for preventative routine work on the electrical insulation and also the personnel required for these routine work can be reduced. Due to the automatic monitoring of the electrical insulation during production operation, the operational safety of the industrial electric furnace is increased, the wear of the system components is reduced, and work to be carried out during downtimes can also be planned better in advance.
  • a respective test run is started manually during the production operation of the industrial electric furnace and is then carried out fully automatically by the monitoring device.
  • This semi-automatic development of the method is preferably carried out when the industrial electric furnace is switched off.
  • This further development enables maintenance or operating personnel to flexibly and at any time initiate a diagnosis or check of the current condition of the electrical insulation and retrieve the current check results.
  • the monitoring device continuously carries out test runs fully automatically during the production operation of the industrial electric furnace.
  • the monitoring device therefore carries out test runs repeatedly and without any prompting from maintenance or operating personnel in order to continuously monitor the electrical insulation with regard to its insulating properties during ongoing operation of the industrial electric furnace. This significantly increases the operational safety and reliability of the industrial electric furnace.
  • the monitoring device stores a course of the determined resistance measurement values and makes it usable or uses it itself to evaluate a change trend in the electrical insulation.
  • the monitoring device can use the stored history of the determined resistance measurements to evaluate long-term trends in the insulating properties of the electrical insulation and to predict an expected service life of the electrical insulation.
  • the monitoring device can compare a current resistance measurement value with a stored history of a measured resistance measurement value in order to diagnose or report damage to the electrical insulation associated with the resistance measurement value if the deviation between the current value and the stored values is too large.
  • the monitoring device can also transmit the stored history of resistance measurement values to other evaluation devices.
  • the monitoring device preferably stores an individual history of the resistance measurements determined for this electrical insulation for each electrical insulation to be checked. With regard to the electrical insulation, this further development enables maintenance work to be optimized and the downtime of the electric furnace to be reduced.
  • the monitoring device determines resistance measurement values between predetermined measuring points in a respective test run, which are not assigned to spatially adjacent sections of the industrial electric furnace. These resistance values represent the total resistance of the individual electrical insulation, which acts in the form of ohmic series and/or parallel resistances between the specified measuring points used. The monitoring device therefore also takes these determined resistance measurements into account to check the electrical insulation with regard to its insulating properties, namely to simultaneously check a plurality of electrical insulation.
  • the object of the present invention is also achieved by an electrical insulation monitoring device of an industrial electric furnace, which is used to: To carry out the previously presented method or one of its further training courses.
  • the monitoring device presented can be electrically coupled or coupled to an insulation measuring device with measuring points of the industrial electric furnace predetermined on several electrically insulated sections of the industrial electric furnace.
  • the monitoring device is designed to automatically determine, during production operation of the industrial electric furnace, resistance measurement values of electrical insulation between the predetermined measuring points, in that the monitoring device temporarily electrically connects the predetermined measuring points, preferably in pairs, to the insulation measuring device in a respective test run according to a predetermined sequence and receives resistance measurements measured by the insulation measuring device between the measuring points connected to the insulation measuring device, and wherein the monitoring device is further designed to check the electrical insulations with regard to their insulating properties based on the determined resistance measurements. Furthermore, the monitoring device is designed to automatically and continuously determine several such resistance measurement values and to automatically and continuously check or diagnose several electrical insulations of the industrial electric furnace. The monitoring device is designed to implement the previously presented method. Therefore, the monitoring device presented also offers the same advantages as the previously presented method.
  • the object of the present invention is also achieved by an industrial electric furnace which is equipped with the monitoring device presented.
  • the industrial electric furnace has predetermined measuring points on several sections that are electrically insulated from one another and which are electrically connected or connectable to the monitoring device.
  • Fig. 1 illustrates an embodiment of the presented industrial electric furnace with the presented monitoring device.
  • the industrial electric furnace 100 is illustrated schematically in plan view by a furnace lid of a furnace vessel, not shown, which is intended for melting a melting material introduced into the furnace vessel.
  • the different parts of the system or spatially adjacent sections of the furnace cover are separated by electrical insulation, which is in Fig. 1 are marked neither true to form nor to scale by circled, consecutively numbered reference numbers 1 to 36.
  • the oven lid is composed of several oven lid segments S1, S1A, S1B, S1C, S2, S2A, S2B, S2C, S3, S3A, S3B, S3C, which are electrically separated from one another by electrical insulation 10 to 27 and 31 to 33.
  • furnace cover segments S1, S2 and S3 live electrodes ER, ES and ET are introduced into the furnace vessel, insulated by electrical insulation 30, 29 and 28, which are fed by a three-phase power supply (not shown).
  • the furnace lid segments S1, S2 and S3 form a recess through which a charging tube CT is inserted into the furnace lid, which is intended for introducing melting material into the furnace vessel.
  • the charging tube CT is electrically insulated from the furnace cover segments S1, S2 and S3 by the insulation 36, 35, 34.
  • the outer edge 40 of the oven lid is electrically connected to the ground or the protective conductor PE and electrically connected to the spatially adjacent ones Furnace lid segments insulated by electrical insulation 1 to 9.
  • Each of the above-mentioned oven lid segments Sx has a predetermined measuring point Mx, which is electrically connected to the monitoring device 200 via a respective measuring line.
  • the electrodes ER, ES, ET, the charging tube CT and the ground mass PE have respective predetermined measuring points MER, MES, MET, MCT and MPE, which are electrically connected to the monitoring device 200 via respective measuring lines.
  • the monitoring device 200 continuously and automatically checks the electrical insulations 1 to 36 during ongoing operation of the industrial electric furnace by measuring the respective ohmic resistance between two measuring points of spatially adjacent sections of the electric furnace as a resistance measurement value of the electrical insulation arranged between these sections. As in Fig. 1 illustrated by way of example, the monitoring device 200 determines the resistance measurement value R28 of the electrical insulation 28, which electrically insulates the electrode ET and the oven cover segment S3 from one another, by measuring the ohmic resistance between the predetermined measuring point MET and the predetermined measuring point M3.
  • the monitoring device 200 determines the respective resistance measurement value R1 to R36 in a test run for all of the electrical insulations 1 to 36 during ongoing operation of the industrial electric furnace and repeats these measurements continuously during the production operation of the electric furnace.
  • a respective course of the resistance measurements R1 to R36 determined in this way is stored in a respective memory SP-R1 to SP-R36, for example by storing the most recent 1000 resistance measurements in an insulation-specific manner or for each electrical insulation 1 to 36 a respective average value DR1 to DR16 as a sliding Average value is calculated and saved.
  • the monitoring device 200 then checks each electrical insulation 1 to 36 with regard to its insulating properties. For example, the monitoring device 200 classifies an electrical insulation x as defective if the resistance measurement value Rx determined for it falls below a predetermined target value MinRx or deviates too much from the average value DRx. An electrical insulation x that is accordingly assessed as defective is reported by the monitoring device 200 to operating or maintenance personnel of the industrial electric furnace (in Fig. 1 illustrated as an example for insulation 30 due to the setpoint value MinR30 being undershot).
  • Fig. 2 illustrates a further embodiment of the presented industrial electric furnace with the presented monitoring device.
  • the industrial electric furnace 100 is greatly simplified by segments S1 to S13 separated by electrical insulation uniformly illustrated as a gap, with the segments S1 to S3 representing the electrodes of the three-phase electric furnace.
  • the segments S1 to S13 have a respective predetermined measuring point MS1 to MS13, which is electrically connected to the monitoring device 200A via a respective line.
  • the electrical insulation also electrically separates all segments S1 to S13 from the ground (or protective conductor) PE, which has a predetermined measuring point MPE, which is also electrically connected to the monitoring device 200A.
  • Illustrated monitoring device 200A does not determine the ohmic resistance between a respective pair of measuring points MS1 to MS13 and MPE itself, but rather determines the respective resistance measurement values by temporarily using the predetermined measuring points MS1 to M13 and MPE in pairs in a test run according to a predetermined sequence or switching sequence 210 an insulation measuring device 400 connects.
  • the predetermined sequence or switching sequence 210 of the monitoring device 200A which acts as a multiplexer, determines the pairs of measuring points MS1 to MS11 and MPE for which the resistance values are to be measured by the insulation measuring device 400 and reported to the monitoring device 200A.
  • Insulation measuring device 400 illustrated for example, a commercially available device from the IR425 series from Bender can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Testing Relating To Insulation (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Claims (7)

  1. Procédé de surveillance pour des isolations électriques (1-36) d'un four électrique industriel (100), en particulier d'un four à réduction, qui présente des points de mesure (Mx) prédéterminés sur plusieurs sections (Sx) isolées électriquement les unes des autres par les isolations électriques (1-36), dans lequel, pendant la phase de production en cours du four électrique industriel (100), un dispositif de surveillance (200 ; 200A) couplé ou pouvant être couplé électriquement aux points de mesure prédéterminés (Mx) détermine automatiquement dans un cycle de test respectif des valeurs de mesure de résistance (R1-R36, Rx) des isolations électriques (1-36) entre les points de mesure prédéterminés (Mx) du four électrique industriel (100), en ce que le dispositif de surveillance (200A) dans un cycle de test respectif connecte électriquement temporairement à un appareil de mesure d'isolation (400) les points de mesure prédéterminés (Mx), de préférence par paires, selon une séquence prédéterminée (210), et l'appareil de mesure d'isolation (400) mesure les valeurs de mesure de résistance (Rx) entre les points de mesure (Mx) connectés à l'appareil de mesure d'isolation (400), et dans lequel le dispositif de surveillance (200A) vérifie les isolations électriques (1-36) du point de vue de leurs propriétés isolantes sur la base des valeurs de mesure de résistance (R1-R36, Rx) déterminées.
  2. Procédé de surveillance selon la revendication 1, caractérisé en ce que, pendant la phase de production en cours du four électrique industriel, un cycle de test respectif est démarré manuellement et est réalisé ensuite entièrement automatiquement par le dispositif de surveillance (200 ; 200A).
  3. Procédé de surveillance selon les revendications 1 ou 2, caractérisé en ce que le dispositif de surveillance (200 ; 200A), pendant la phase de production en cours du four électrique industriel, exécute en continu des cycles de test de manière entièrement automatique.
  4. Procédé de surveillance selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le dispositif de surveillance (200; 200A) enregistre un tracé des valeurs de mesure de résistance (R1-R36, Rx) déterminées et le fournit et/ou l'utilise à des fins d'analyse d'une tendance de variation des isolations électriques.
  5. Procédé de surveillance selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le dispositif de surveillance (200; 200A) détermine dans un cycle de test respectif des valeurs de mesure de résistance (R1-R36, Rx) entre des points de mesure prédéterminés (Mx), qui ne sont pas associés à des sections spatialement adjacentes du four électrique industriel, et les prend en compte pour vérifier les isolations électriques (1-36) du point de vue de leurs propriétés isolantes.
  6. Dispositif de surveillance pour des isolations électriques (1-36) d'un four électrique industriel (100), en particulier d'un four à réduction, qui est couplé ou peut être couplé électriquement à des points de mesure (Mx) prédéterminés du four électrique industriel sur plusieurs sections (Sx) isolées électriquement les unes des autres du four électrique industriel (100) et à un appareil de mesure d'isolation (400), dans lequel le dispositif de surveillance (200 ; 200A) est conçu à des fins de détermination automatique, pendant la phase de production en cours du four électrique industriel, de valeurs de mesure de résistance (R1-R36, Rx) des isolations électriques (1-36) entre les points de mesure prédéterminés (Mx), en ce que le dispositif de surveillance 200A), dans un cycle de test respectif, connecte électriquement temporairement à un appareil de mesure d'isolation (400) les points de mesure prédéterminés (Mx), de préférence par paires, selon une séquence prédéterminée (210), et reçoit de l'appareil de mesure d'isolation (400) des valeurs de mesure de résistance (R1-R36, Rx) mesurées par l'appareil de mesure d'isolation (400) entre les points de mesure (Mx) connectés à l'appareil de mesure d'isolation (400), et dans lequel le dispositif de surveillance (200 ; 200A) est de plus conçu pour vérifier les isolations électriques (1-36) du point de vue de leurs propriétés isolantes sur la base des valeurs de mesure de résistance (R1-R36, Rx) déterminées,
  7. Four électrique industriel (100), en particulier un four à réduction, qui est équipé d'un dispositif de surveillance (200 ; 200A) selon la revendication 6, dans lequel le four électrique industriel (100) présente des points de mesure (Mx) prédéterminés sur plusieurs sections (Sx) isolées électriquement les unes des autres, lesquels sont connectés ou peuvent être connectés électriquement au dispositif de surveillance (200 ; 200A).
EP18208652.0A 2017-12-04 2018-11-27 Procédé de surveillance et dispositif de surveillance pour isolations électriques d'un four électrique industriel ainsi que four électrique industriel Active EP3492851B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017221848.7A DE102017221848A1 (de) 2017-12-04 2017-12-04 Überwachungsverfahren und Überwachungsvorrichtung für elektrische Isolierungen eines industriellen Elektroofens, sowie industrieller Elektroofen

Publications (2)

Publication Number Publication Date
EP3492851A1 EP3492851A1 (fr) 2019-06-05
EP3492851B1 true EP3492851B1 (fr) 2024-03-13

Family

ID=64500298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18208652.0A Active EP3492851B1 (fr) 2017-12-04 2018-11-27 Procédé de surveillance et dispositif de surveillance pour isolations électriques d'un four électrique industriel ainsi que four électrique industriel

Country Status (2)

Country Link
EP (1) EP3492851B1 (fr)
DE (1) DE102017221848A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021111916A1 (de) * 2021-05-07 2022-11-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Verfahren zur direkten widerstandsbeheizung oder analyse einer füllung in einem verfahrenstechnischen apparat

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0772667B2 (ja) * 1990-10-29 1995-08-02 新日本製鐵株式会社 直流アーク炉の絶縁監視装置
DE4136447A1 (de) * 1991-11-06 1993-05-13 Abb Patent Gmbh Verfahren und einrichtung zur ueberwachung der wandstaerke eines keramischen tiegels eines induktionstiegelofens
JP3902063B2 (ja) * 2002-04-30 2007-04-04 三菱重工業株式会社 抵抗値測定装置
DE102006006524B4 (de) * 2006-02-10 2008-11-27 Saveway Gmbh & Co. Kg Verfahren zur Überwachung eines Induktionsofens und Induktionsofen
EP2811248B1 (fr) * 2013-06-06 2019-05-08 Siemens Aktiengesellschaft Surveillance de l'isolation d'un circuit de chauffage électrique pour un four de fusion et procédé de surveillance

Also Published As

Publication number Publication date
EP3492851A1 (fr) 2019-06-05
DE102017221848A1 (de) 2019-06-06

Similar Documents

Publication Publication Date Title
EP2700962B1 (fr) Mesure d'une résistance d'un contacteur de commutation d'un disjoncteur électrique
EP3524985B1 (fr) Dispositif et procédé pour une surveillance de l'isolation à reconnaissance d'un conducteur extérieur défectueux dans un système d'alimentation électrique triphasé isolé terre
EP1643259B1 (fr) Procédé et dispositif pour la détection des points de contact dans des machines tournantes
EP2378301B1 (fr) Appareil de simulation de défaut pour testeur d'isolation de câble
EP1818638B1 (fr) Dispositif destiné à la surveillance d'un four à induction et four à induction
DE102007017543B4 (de) Verfahren zur Entfernungsortung von Erdschlüssen
EP3492851B1 (fr) Procédé de surveillance et dispositif de surveillance pour isolations électriques d'un four électrique industriel ainsi que four électrique industriel
EP3164726B1 (fr) Procédé et dispositif de contrôle d'un commutateur à gradins d'un transformateur
EP3493005B1 (fr) Procédé de détection d'au moins un état d'outil d'un outil de machine à outiller destiné à usiner des pièces et des machines à outiller
EP3385007B1 (fr) Dispositif à pièce d'usure et dispositif de mesure d'usure
EP3188924B1 (fr) Procédé et dispositif de surveillance d'un réseau électrique dans un véhicule ferroviaire et véhicule ferroviaire
DE102019204307A1 (de) Überwachungsverfahren einer Elektroenergieübertragungseinrichtung
DE2717277A1 (de) Vorrichtung zum ermitteln des badspiegels einer metallschmelze in einer kokille
WO2014071913A1 (fr) Procédé et dispositif de localisation d'un défaut à la terre dans un four à induction, ainsi que four à induction
DE102012103263A1 (de) Verfahren und System zur Untersuchung einer Anzapfungswechseleinrichtung eines Transformators
EP0609261B1 (fr) Systeme de controle d'un systeme de commande electrique
DE102015109194B4 (de) Hochstromkabel und Verfahren zur Ermittlung des Verschleißgrades von Hochstromkabeln
EP3885862B1 (fr) Procédé de surveillance d'état
AT509241A1 (de) Verfahren zum überprüfen der schalter bzw. der kabel einer überwachungseinrichtung des antriebs von schienenweichen sowie vorrichtung zur durchführung dieses verfahrens
DE102014019119A1 (de) Antriebsvorrichtung für ein Kraftfahrzeug
EP3014291B1 (fr) Contrôle de la terminaison de conducteurs partiels de barres de stator de machines électriques
DE102020127262A1 (de) Erfassungseinrichtung, Erfassungsanordnung, Kraftfahrzeug und Verfahren zum Erfassen zumindest eines Zellparameters
DE102012020438A1 (de) Verfahren zur Prüfung einer elektrischen Verbindung zwischen zwei Energiespeichereinheiten einer Batterieanordnung und Batterieanordnung
DE10219635B3 (de) Vorrichtung zur Fehlererkennung in Verkabelungen
DE102021133072A1 (de) Verfahren zur Messung des Verschleißzustandes von Induktionstiegelöfen

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

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

17P Request for examination filed

Effective date: 20181127

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

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

Free format text: STATUS: EXAMINATION IS IN PROGRESS

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230707

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20231206

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502018014246

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240614

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20240313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240613

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240613

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240613

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240614

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

RAP4 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: SMS GROUP GMBH

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240715

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313