EP3264439B1 - Élément fusible et dispositif de protection contre les surtensions - Google Patents

Élément fusible et dispositif de protection contre les surtensions Download PDF

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Publication number
EP3264439B1
EP3264439B1 EP17174720.7A EP17174720A EP3264439B1 EP 3264439 B1 EP3264439 B1 EP 3264439B1 EP 17174720 A EP17174720 A EP 17174720A EP 3264439 B1 EP3264439 B1 EP 3264439B1
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EP
European Patent Office
Prior art keywords
fusible conductor
conductor
fuse
fusible
protection device
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
EP17174720.7A
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German (de)
English (en)
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EP3264439A1 (fr
Inventor
Stefan Seitz
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
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Siemens AG
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Publication of EP3264439A1 publication Critical patent/EP3264439A1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member
    • H01H85/10—Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/46—Circuit arrangements not adapted to a particular application of the protective device
    • H01H2085/466—Circuit arrangements not adapted to a particular application of the protective device with remote controlled forced fusing

Definitions

  • the invention relates to a fuse element for a fuse, for example for a semiconductor protection fuse, so-called HLS fuse, or a low-voltage high-performance fuse, so-called NH fuse. Furthermore, the invention relates to an overcurrent protection device, for example a fuse, which has at least one such fusible conductor.
  • An example of such an overcurrent protection device is, for example, a fuse that interrupts the circuit by the melting of one or more fuse links, when the current strength of the circuit protected by the fuse exceeds a certain value over a certain period of time.
  • the fuse consists of an insulating body, which has two electrical connections, which are electrically connected to one another in the interior of the insulating body by one or more fuse elements.
  • the fusible conductor which has a reduced in cross-section compared to the other conductors of the circuit, is heated by the current flowing through it and melts when the relevant rated current of the fuse for a predetermined period of time is clearly exceeded. Due to its good insulation properties is used as the material for the insulating body mostly ceramic.
  • Such a fuse insert is for example from the European patent EP 0 917 723 B1 known.
  • Fuses are available in various designs.
  • simple device fuses which have a simple glass cylinder in which the fusible conductor is added
  • quartz sand - is filled
  • the housing of the fuse is formed by a ceramic body in which the solidified sand, the electrical connections and the fusible conductor are accommodated or held.
  • the quartz sand acts here as an arc extinguishing agent: the rated current of the fuse is clearly exceeded - for example, due to a high short-circuit current - so this leads to a response of the fuse, in the course of which the fusible conductor melts first and then evaporated due to the high temperature development.
  • the metal vapor of the vaporized fusible conductor precipitates on the surface of the silica sand grains, the arc is again cooled.
  • the resistance in the interior of the fuse link increases in such a way that the arc finally disappears.
  • the to be protected by the fuse electrical line is interrupted.
  • NH fuses typically use one or more fuse links in the form of copper tapes. Each of these fusible links has so-called bottleneck rows for selectively switching off the fuse. Furthermore, at least one solder deposit can be applied to one or more of the fuse elements, with the aid of which the overload characteristic of the fuse can be influenced.
  • NH fuses serve, for example, to protect equipment or control cabinets against fire, for example due to overheated connection cables.
  • the let-through energy value I 2 t which is decisive for the turn-off behavior of the fuse, is relatively large for NH fuses, which is why they have a rather sluggish characteristic.
  • the fusible conductor is heated by an electrical overload current to a temperature which is above the melting temperature of the solder, this solder diffuses into the fusible conductor material and forms an alloy with it. As a result, the electrical resistance of the fusible conductor increases, which leads to its further heating, whereby the diffusion process is further accelerated until the fusible conductor in the vicinity of the solder deposit is completely dissolved, so that it breaks off, whereby the current flow is interrupted. In the case of a brief, permissible overcurrent, the NH fuse does not prematurely switch off. On the other hand, when a short-circuit current occurs, the fusible conductor ruptures at the bottleneck rows.
  • NH fuses serve, for example, to protect equipment or control cabinets against fire, for example due to overheated connection cables.
  • the transmission energy value I 2 t which is decisive for the shutdown behavior of the fuse, is relatively large for NH fuses, which is why it has a slower characteristic respectively. Semiconductor protection is therefore generally not feasible with NH fuses.
  • Semiconductor fuses which protect high-quality components and components, for example power semiconductors, from the harmful effects of a short circuit are also known from the prior art. Due to their significantly faster turn-off characteristic, semiconductor fuses are used, for example, in the rectifier section and in the DC link of converters, but also in UPS systems and in soft starters for motors. They are usually characterized by a higher power loss, which is why mostly silver is used as the fusible conductor material.
  • the turn-off characteristics of a fuse are therefore largely determined by the design of the fuse conductor. This has an influence on the switchable voltage, the heating in general, the time-temperature behavior in the melting as well as the extinguishing or switch-off phase, and thus on the melting and the turn-off I 2 t value.
  • a disadvantageous design of the fusible lead to problems in the shutdown of the fuse, for example, due to low arc tension, body tears of the fuse body or bursting of the fuse with subsequent arc leakage due to excessive heating.
  • a disadvantageous design of the fusible conductor can lead to the fuse having excessively high melting or turn-off I 2 t values.
  • the switching behavior of the fuse by the selection of the fusible conductor material, the design and arrangement of the solder points, the selection of the securing sand and possibly the solidification of the sand, and by partially high-strength ceramics as a fuse body, optimized.
  • the current-carrying capacity of the fuse is determined essentially by the design of these bottleneck rows.
  • Fuses are used, for example, for line protection, semiconductor protection, battery protection or even in a photovoltaic system to protect the respective line network.
  • Such fuses have a defined tripping characteristic and respond according to their respective operating characteristic.
  • the tripping behavior of such a fuse is also influenced by external influencing variables - for example the ambient temperature, the installation conditions or the possibility for cooling or heating. Due to their design, it is not possible to set the triggering sensitivity of such a fuse to the currently prevailing environmental conditions or selectively switch off the fuse, for example, to disconnect a photovoltaic system directly from the mains.
  • the fuses used must therefore - in order to be able to defy all possible environmental influences (temperature, installation situation, starting currents) - designed to be significantly oversized in order to reliably prevent false triggering.
  • temperature, installation situation, starting currents e.g. at low temperatures.
  • triggered fuses triggerable or triggered fuses
  • the triggered triggering can be carried out, for example, by a mechanical severing of the fusible conductor, a severing by pyroelectric charging or by an additional heating resistor.
  • the term "emergency” is to be understood as a predefined operating state, which is still below the tripping characteristic of the fuse, which is why the fuse would not trigger by itself, but in which the fuse protected by the fuse electrical circuit should be interrupted by a To avoid or eliminate dangerous situations.
  • Typical applications are the interruption of the battery circuit in electrically powered vehicles - for example, in the case of an accident - or the separation of photovoltaic systems from the supply network - for example in case of fire.
  • the prior art ( DE930 399 C ) further discloses a fusible link, the fusible conductor of which has a plurality of series-like cross-sectional weakenings of equal size, which are unequally spaced, such that the distance in the direction of the fusible conductor ends increases.
  • the fuse element according to the invention for an overcurrent protection device has an elongate base body extending in a longitudinal direction, the first end of which has a first contact area for contacting with a first contact element of the overcurrent protection device, and the second end has a second contact area for contacting with a second contact area
  • Contact element of the overcurrent protective device has.
  • a plurality of bottleneck rows are arranged, each having a plurality of holes, which in turn are arranged transversely to the longitudinal direction of the melt conductor.
  • two of the bottleneck rows are at a smaller distance from one another than the other bottleneck rows.
  • the fusible conductor in this central region has at least one additional connection conductor, which is electrically conductively connected to the fusible conductor.
  • the two bottleneck rows arranged in the middle region of the fusible conductor have a smaller distance from each other than the remaining bottleneck rows arranged between the middle region and the contact regions, which usually have an equidistant spacing from one another.
  • the middle region is arranged substantially centrally between the first contact region and the second contact region of the fusible conductor.
  • the tripping characteristic of the fusible conductor is displaced in such a way that an earlier tripping of the fusible conductor and thus of the overcurrent protection device can thereby be realized.
  • the tripping characteristic of the overcurrent protection device is thus selectively influenced in the direction of a more sensitive characteristic, whereby the fusible conductor, and thus the overcurrent protection device, more flexible to their respective application and the prevailing environmental influences - especially ambient temperature, installation situation and inrush currents - are customizable.
  • the distance between the two bottleneck rows arranged in the middle region is substantially smaller than the melt conductor width, but larger than the hole spacing of the bottleneck rows.
  • the distance of the two bottleneck rows arranged in the central region is between 3 mm and 20 mm. This range has proved to be particularly advantageous for the configuration of the tripping characteristic with respect to the desired control current and the desired displacement of the characteristic.
  • the fuse element is strip-shaped.
  • strip-shaped is understood to mean that, on the one hand, the length of the fusible conductor is significantly greater than its width, and, on the other hand, its width is significantly greater than its thickness. This geometry is particularly suitable for the formation of bottleneck rows and the application of solder points.
  • the additional connection conductor is formed laterally on the fusible conductor.
  • the fusible conductor can be made by punching from a suitable strip material, wherein the cutting tool is moved in the direction of the thickness of the fusible conductor.
  • the lateral molding of the additional connection conductor is particularly advantageous because no separate manufacturing step is required for punching the fusible conductor.
  • the term "lateral" is meant to be transverse to the longitudinal direction, i. to look at the broad side of the fuse element strip viewed in the direction of the thickness extension to understand.
  • the fusible conductor has a solder deposit in the region of the additional connecting conductor.
  • the two bottleneck rows arranged in the middle region of the fusible conductor are arranged obliquely to one another.
  • the latter has a further additional connecting conductor, which is connected in an electrically conductive manner to the fusible conductor in such a way that the two narrow rows arranged in the central region of the fusible conductor between the fusible link first additional connection conductor and the further additional connection conductor are arranged.
  • the middle region of the fusible conductor can be electrically conductively connected to an external control device in order to be able to specifically thermally pre-stress it with a defined control current if required by means of a suitable electrical circuit.
  • the two additional connection conductors are arranged symmetrically.
  • the two additional connecting conductors are arranged offset in the longitudinal direction by at least one row of bottlenecks.
  • the two connection conductors can be electrically conductively connected to a control device.
  • the two bottleneck rows arranged in the central region can be specifically thermally pre-stressed, as a result of which the tripping characteristic of the overcurrent protection device can be changed in a defined manner.
  • the controller may be part of the overcurrent protection device.
  • a higher-level control device which is electrically conductively connected to a plurality of overcurrent protection devices and interacts with them in such a way that their tripping characteristic can be varied in an individually predefined manner.
  • the tripping behavior of the fuse can be designed in a similar manner to an electronic trip unit (ETU) customary with circuit breakers.
  • ETU electronic trip unit
  • the overcurrent protection device has at least one fusible conductor of the type described above.
  • the overcurrent protection device further comprises a control device with which the at least one additional connection conductor is electrically conductively connected in order to influence the tripping characteristic of the overcurrent protection device by means of the control device in a targeted manner.
  • the two bottleneck rows arranged in the central region can be specifically thermally pre-stressed, as a result of which the tripping characteristic of the overcurrent protection device can be changed in a defined manner. Furthermore, by a correspondingly high current pulse also a direct, i. immediate triggering of the fuse can be realized.
  • FIG. 1 schematically shows the basic structure of a fuse 1.
  • This has a first contact element 4 and a second contact element 5, which consist of an electrically conductive material, such as copper.
  • the contact elements 4 and 5 are mechanically fixed and tightly connected to a fuse body 2, which consists of a solid, non-conductive and highly heat-resistant material, such as a ceramic.
  • the securing body 2 generally has a tubular basic shape and is pressure-tight to the outside, for example by means of two sealing caps 3, closed.
  • the contact elements 4 and 5 each extend through an opening formed in the closure caps 3 in an interior of the fuse body 2.
  • a so-called fuse element 10 is arranged, which electrically conductively connects the first contact element 4 and the second contact element 5.
  • a first end 14 of the fusible conductor 10 is electrically conductively connected to the first contact element 4, and a second end 15 is electrically conductively connected to the second contact element 5.
  • the remaining interior of the fuse link 1 is completely filled in the present case with an extinguishing agent 6, which serves to extinguish and cool the fuse 1 in the event of triggering and completely surrounds the fusible conductor 10.
  • extinguishing agent 6 for example, quartz sand is used.
  • FIG. 1 a fusible conductor 10 shown, it is also possible to arrange a plurality of fusible conductor 10 electrically connected in parallel to each other in the fuse body 2 and to contact with the two contact elements 4 and 5 accordingly.
  • the fusible conductor 10 is generally made of a highly conductive material such as copper or silver and has its length, i. in its longitudinal direction L, several bottleneck rows 11 and one or more solder deposits 13 - so-called solder points - on. About the bottleneck rows 11 and the solder points 13, the tripping characteristic of the fusible conductor 10 - and thus the fuse 1 - be adapted to the particular application. For currents that are smaller than the rated current of the fuse 1, only so much power dissipation is implemented in the fusible conductor 10 that it can be discharged in the form of heat quickly over the sand, the fuse body 2 and the contacts 4 and 5 to the outside. The temperature of the fusible conductor 10 does not rise above its melting point.
  • the fusible conductor 10 according to the invention has a plurality of bottleneck rows 11, which extend transversely to the longitudinal direction L of the fusible conductor 10.
  • the bottleneck rows 11 are oriented at right angles to the longitudinal direction L of the fusible conductor 10.
  • this is not mandatory, as in FIG. 2D illustrated embodiment shows.
  • About the first end 14 and the second end 15 of the fuse element 10 with the first contact element 4 and the second contact element 5 of the fuse 1 are electrically connected.
  • the bottleneck rows 11 are formed from a plurality in a series of holes 16 arranged one behind the other and are usually arranged at an equidistant distance a 2 spaced from each other. Only in a middle region 12, which is arranged centrally between the first end 14 and the second end 15, the two narrow rows 11-1 and 11-2 arranged there have a smaller distance a 1 from each other. This distance a 1 is selected so that it is substantially smaller than the width of the fusible conductor 10 measured in a width direction B, but larger than the space between the individual holes 16 of a bottleneck row 11th
  • At least one additional connection conductor 17 is integrally formed on the fusible conductor 10.
  • the FIGS. 2A and 2D show in this case embodiments with only one additional connection conductor 17.
  • the first additional connection conductor 17 and the additional additional connection conductor 18 are shown.
  • the additional connection conductors 17 and 18 are thus - depending on the embodiment - connected to one side or both sides of the fuse element 10.
  • the additional connection conductors 17 and 18 are formed from the fusible conductor material and have a similar cross-section as the fusible conductor 10.
  • This cross-section of the additional connection conductors 17 and 18 may only be chosen so large that at a shutdown of the fuse 1, ie when a melting of the fusible conductor 10, the additional connection conductor 17 and possibly the additional additional connection conductor 18 are also separated.
  • the central region 12 - ie the area between the arranged at a distance 1 , narrower spaced bottleneck rows 11 - are acted upon by the additional connection conductors 17 and 18 with an electrical control current, whereby the central region 12 specifically thermally biased can be.
  • the two bottleneck rows 11-1 and 11-2 arranged in the central region 12 are arranged obliquely relative to one another, ie their spacing is not constant in the width direction B, but continuously increases or decreases. With the distance a 1 then the smallest distance between the two bottleneck rows 11-1 and 11-2 is designated, in Figure 2D at the respective left end of the bottleneck rows 11-1 and 11-2. With the help of this oblique arrangement is a different one Responsiveness of the characteristic shift feasible.
  • a rough control can also be done without external power source: this is for example the in FIG. 2A used fusible conductor 10 and electrically connected such that the realized via the additional terminal conductor 17 control terminal with the main contacts of the fuse 1 - the first contact element 4 and the second contact element 5 - is electrically connected. Since a voltage drop occurs due to the outer bottleneck rows 11 of the fuse 1 under current, this leads to a corresponding control current with a corresponding shift in the tripping characteristic of the fusible conductor 10 or the fuse 1 (see also FIG. 3 ).
  • the central region 12 of the fusible conductor 10 would have to carry only the solder points 13 of the fuse 1 or at least be soldered. A monitoring of the aging state of the fuse 1 would then be possible even during operation. Furthermore, on the basis of a continuous resistance measurement of the central region 12 due to the change in the electrical resistance with temperature change of the fusible material and the operating state of the fuse 1 can be deduced.
  • FIG. 3 are various tripping characteristics of the fuse element 10 of the invention or the fuse according to the invention 1 shown schematically.
  • the time duration t which is required for melting the fusible conductor 10
  • the characteristic shown on the right, designated K 1 describes, by way of example, the tripping characteristic of a 100 A photovoltaic fuse, as used to protect photovoltaic systems is used.
  • the curve K 2 shown on the left describes the tripping characteristic of a 100A fuse 1 according to the invention with thermal preload of the fuse element 10 according to the invention: the tripping characteristic K 2 is shifted to the left and - in particular in the upper region - approximates the tripping characteristic of a conventional 63A fuse.
  • the resulting possible use of the fuse 1 according to the invention is exemplified by the example of a photovoltaic system: would in such a system, which has three strands of 100A, which are each secured with a 100A fuse corresponding to the characteristic K 1 , a short circuit occur in one of the three strands, the two intact strands would generate 200A to 220A short circuit current under full sunlight. However, if the sun is at an angle during the morning or evening hours or if the weather is cloudy, only a partial flow, eg of 110A, would occur. The photovoltaic system would not deliver power to the inverter in this operating state because the entire system is shorted.
  • the fusible conductor could be thermally biased according to the characteristic curve K 2 , so that thereby a trip within a reasonable time t 12 achievable would.
  • the photovoltaic system would then continue to run properly with the two remaining strands.
  • the applications of the inventive fusible conductor 10 and the fuse 1 according to the invention are not limited to the field of photovoltaic systems.
  • the field of photovoltaic systems has been selected only as an example to illustrate the advantages of the inventive fuse element 10 and the fuse 1 according to the invention.

Claims (13)

  1. Élément fusible (10) pour un dispositif de protection contre les surtensions (1),
    - qui présente un corps de base oblong s'étendant dans un sens d'allongement longitudinal (L), dont la première extrémité (14) présente une première zone de contact pour le contact avec un premier élément de contact (4) du dispositif de protection contre les surtensions (1) et dont la deuxième extrémité (15) présente une deuxième zone de contact pour le contact avec un deuxième élément de contact (5) du dispositif de protection contre les surtensions (1),
    - dans lequel entre la première zone de contact et la deuxième zone de contact, une pluralité de rangées d'emplacements étroits (11) sont disposées qui présentent respectivement une pluralité de trous (16) qui sont disposés transversalement au sens d'allongement longitudinal (L) de l'élément fusible (10),
    dans lequel
    dans une zone (12) de l'élément fusible (10) disposée au centre entre la première zone de contact et la deuxième zone de contact, deux des rangées d'emplacements étroits (11-1, 11-2) présentent un écart plus étroit entre elles que les rangées d'emplacements étroits (11) restantes, caractérisé en ce que
    - l'élément fusible (10) présente dans cette zone (12) centrale au moins un élément de connexion (17, 18) supplémentaire qui est relié en conduction électrique avec l'élément fusible (10).
  2. Élément fusible (10) selon la revendication 1, caractérisé en ce que l'écart (a1) des deux rangées d'emplacements étroits (11-1, 11-2) disposées dans la zone centrale (12) est essentiellement plus étroit que la largeur de l'élément fusible mais plus grand que l'écart des trous des rangées d'emplacements étroits (11-1, 11-2).
  3. Élément fusible (10) selon la revendication 2, caractérisé en ce que l'écart des deux rangées d'emplacements étroits (11-1, 11-2) disposées dans la zone centrale est situé entre 3 et 20 mm.
  4. Élément fusible (10) selon l'une des revendications précédentes, caractérisé en ce que l'élément fusible (10) est en forme de bande.
  5. Élément fusible (10) selon l'une des revendications précédentes, caractérisé en ce que l'élément de connexion (17) supplémentaire est formé sur le côté de l'élément fusible.
  6. Élément fusible (10) selon l'une des revendications précédentes, caractérisé en ce que l'élément fusible présente un dépôt de brasage au niveau de l'élément de connexion (17) supplémentaire.
  7. Élément fusible (10) selon l'une des revendications précédentes, caractérisé en ce que les deux rangées d'emplacements étroits (11-1, 11-2) disposées dans la zone centrale (12) de l'élément fusible (10) sont disposées en biais l'une par rapport à l'autre.
  8. Élément fusible (10) selon l'une des revendications précédentes, caractérisé en ce que l'élément fusible (10) présente un autre élément de connexion (18) supplémentaire qui est ainsi relié en conduction électrique avec l'élément fusible (10) que les deux rangées d'emplacements étroits (11-1, 11-2) disposées dans la zone centrale (12) de l'élément fusible (10) sont disposées entre le premier élément de connexion (17) supplémentaire et l'autre élément de connexion (18) supplémentaire.
  9. Élément fusible (10) selon la revendication 8, caractérisé en que les deux éléments de connexion (17, 18) supplémentaires de l'élément fusible (10) sont disposés symétriquement.
  10. Élément fusible (10) selon la revendication 8, caractérisé en que les deux éléments de connexion (17, 18) supplémentaires sont disposés décalés l'un par rapport à l'autre d'au moins une rangée d'emplacements étroits, dans le sens d'allongement longitudinal (L).
  11. Élément fusible (10) selon l'une des revendications 8 à 10, caractérisé en ce que les deux éléments de connexion (17, 18) peuvent être reliés en conduction électrique par un dispositif de commande.
  12. Dispositif de protection contre les surtensions (1) qui présente au moins un élément fusible (10) selon l'une des revendications 1 à 11.
  13. Dispositif de protection contre les surtensions (1) selon la revendication 12, caractérisé en ce que le dispositif de protection contre les surtensions (1) présente en outre un dispositif de commande avec lequel l'au moins un élément de connexion (17, 18) supplémentaire est relié en conduction électrique pour influencer de manière ciblée une caractéristique de déclenchement du dispositif de protection contre les surtensions (1).
EP17174720.7A 2016-06-28 2017-06-07 Élément fusible et dispositif de protection contre les surtensions Active EP3264439B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016211621.5A DE102016211621A1 (de) 2016-06-28 2016-06-28 Schmelzleiter und Überstrom-Schutzeinrichtung

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EP3264439A1 EP3264439A1 (fr) 2018-01-03
EP3264439B1 true EP3264439B1 (fr) 2019-09-04

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DE102018213522B4 (de) 2018-08-10 2022-06-02 Siemens Aktiengesellschaft Schmelzsicherung, Sicherungskörper, System und Verfahren
ES2937138T3 (es) 2018-12-20 2023-03-24 Siemens Ag Cortacircuito fusible con función de medición integrada
EP3867939B1 (fr) 2018-12-20 2023-02-15 Siemens Aktiengesellschaft Fusible avec fonction de mesure intégrée
CN113287184A (zh) * 2019-01-16 2021-08-20 西门子股份公司 熔断器本体和熔断器
DE102019201405A1 (de) 2019-02-04 2020-08-06 Siemens Aktiengesellschaft Messvorrichtung und Sicherungsanordnung sowie Anordnung zur Strommessung
DE202020102365U1 (de) 2020-04-28 2020-06-10 Siemens Aktiengesellschaft Messvorrichtungsgehäuse, Messvorrichtung und Sicherungsanordnung
DE102020208224B3 (de) 2020-07-01 2021-10-07 Vitesco Technologies GmbH Elektrische Schmelzsicherung
DE102022211027A1 (de) * 2022-10-18 2024-04-18 Siemens Aktiengesellschaft Alterungsüberprüfung für Niederspannungskomponenten

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CH338890A (de) * 1954-04-12 1959-06-15 Licentia Gmbh Niederspannungs-Hochleistungs-Sicherung
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DE3309378A1 (de) * 1983-03-16 1984-09-27 Efen Elektrotechnische Fabrik Gmbh, 6228 Eltville Sicherungseinsatz
DE19506547C2 (de) * 1994-08-01 1997-01-30 Siemens Ag Ganzbereichs-Stromrichtersicherung
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DE102016211621A1 (de) 2017-12-28

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