[go: up one dir, main page]

EP4521436A1 - Appareil de protection pour interrompre un circuit lors de la surintensité - Google Patents

Appareil de protection pour interrompre un circuit lors de la surintensité Download PDF

Info

Publication number
EP4521436A1
EP4521436A1 EP24198928.4A EP24198928A EP4521436A1 EP 4521436 A1 EP4521436 A1 EP 4521436A1 EP 24198928 A EP24198928 A EP 24198928A EP 4521436 A1 EP4521436 A1 EP 4521436A1
Authority
EP
European Patent Office
Prior art keywords
protective device
current path
load
contact
break switch
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.)
Pending
Application number
EP24198928.4A
Other languages
German (de)
English (en)
Inventor
Torsten Wolf
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.)
Jean Mueller Elektrotechnische Fabrik GmbH
Original Assignee
Jean Mueller Elektrotechnische Fabrik 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 Jean Mueller Elektrotechnische Fabrik GmbH filed Critical Jean Mueller Elektrotechnische Fabrik GmbH
Publication of EP4521436A1 publication Critical patent/EP4521436A1/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/122—Automatic release mechanisms with or without manual release actuated by blowing of a fuse
    • 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
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses

Definitions

  • the invention relates to a protective device for interrupting an electrical circuit when an overcurrent occurs.
  • An overcurrent can be, for example, a short-circuit current or an overload current.
  • the protective device is, in particular, a protective device for a direct current circuit.
  • the invention relates to a method for protecting a direct current circuit against an overcurrent.
  • a wide variety of protective devices are known from the state of the art for interrupting a current flow or a circuit in the event of an overcurrent.
  • DE 10 2011 089 631 A1 A circuit breaker for interrupting an electrical current in the event that an electrical fault causes the current magnitude or the temporal progression of the current intensity to no longer exhibit the desired characteristics.
  • This circuit breaker is, in particular, a low-voltage circuit breaker.
  • Direct current (DC) applications are becoming increasingly important in various economic sectors.
  • DC networks are being developed to supply energy to production halls or entire factories.
  • the technical advantages of direct current grids also play a major role, such as the avoidance of harmonics.
  • direct current plays a major role in energy storage systems, in which excess energy is buffered so that it can be used during periods of low power production.
  • UPS systems uninterruptible power supply systems Due to ever-increasing energy demand, the corresponding UPS systems are becoming ever larger and the corresponding energy storage devices ever more powerful, resulting in ever higher currents and/or voltages in such UPS systems.
  • DC voltage grids and AC voltage grids with low frequencies are particularly problematic for various reasons with regard to their reliable protection against overcurrent, especially short-circuit current, and with regard to safe shutdown in the event of an overcurrent.
  • the increasing performance of battery storage systems is leading to a continuous decrease in the internal resistance of the battery cells.
  • the reduction in internal resistance leads to very high prospective short-circuit currents.
  • Very short lines between the battery and a protective device for interrupting the circuit also ensure very low inductances, which result in extremely short time constants. These are regularly less than a millisecond and can, in individual cases, be in the range of several microseconds.
  • a further advantage of fuse links is that if the fuse is triggered, arcs and ionizing gases are not emitted into the environment but remain encapsulated in the housing of the fuse link. Compared to semiconductor circuit breakers, which are also used to protect direct current networks, fuses are also considerably more cost-effective.
  • the object of the present invention is to provide a protective device for interrupting an electrical circuit when an overcurrent occurs, which utilizes the advantages of the fuse link with a fusible element and overcomes its aforementioned disadvantages.
  • the protective device according to the invention serves to interrupt an electrical circuit when an overcurrent occurs.
  • the protective device is preferably used in direct current applications.
  • the protective device has a current path that extends through the protective device from an input terminal of the protective device to an output terminal of the protective device, wherein the protective device has a fuse holder in the current path for receiving a fusible element.
  • the protective device has an electronic monitoring device, wherein the electronic monitoring device has a measuring device which is designed to detect one or more electrical measured variables characteristic of the presence of an overcurrent, wherein the electronic monitoring device has evaluation electronics which is designed to detect the occurrence of an overcurrent in the current path based on the electrical measured variable(s) detected by the measuring device, wherein the monitoring device is designed to trigger the tripping mechanism to interrupt the current path by separating the contacting elements upon detection of the occurrence of an overcurrent in the current path.
  • the fuse element of the fuse link is live even during normal operation, i.e. even without an overcurrent occurring.
  • the fuse link Due to its arrangement in the main current path, the fuse link is permanently exposed to the operating current of the circuit. Due to this design, namely the arrangement of the fuse holder and thus the fuse link inserted there in the main current path, the circuit is always protected by the fuse link inserted in the fuse holder.
  • the main current path is always interrupted when the fuse link cannot carry current, e.g. if the fuse element of the fuse link has melted due to an overcurrent or the fuse element of the fuse link has been severed for other reasons, or if there is no fuse link in the fuse holder at all.
  • fuses are less significant or even non-existent in DC applications, as the current path of the protective device is reliably interrupted when the switch-disconnector is opened.
  • a further advantage of using a switch-disconnector is that the disconnection point created by the tripped fuse link does not usually meet the requirements for safe isolation, whereas an opened switch-disconnector does.
  • the advantage of using a fuse link is that the current path is reliably interrupted and/or the current flowing through the current path is at least significantly reduced due to the tripped fuse, in order to protect downstream devices and/or persons.
  • the switch-disconnector and the tripping mechanism coupled to it do not need to have particularly fast switching characteristics, so that the corresponding components can be designed relatively simply. This has a beneficial effect on the manufacturing costs of the protective device.
  • the particular advantage of the protective device according to the invention compared to a circuit breaker is that the main task of the shutdown process continues to be performed by the fuse link.
  • the contacting elements and any other elements for contacting and separating the contacting elements of the switch-disconnector can thus be designed more simply, as particularly high currents do not need to be switched, as the current is already reduced by the melting of the fuse link.
  • Another advantage is that in the event of a short circuit, only the fuse link needs to be replaced to restore the reliable function of the protective device.
  • An overcurrent occurs in particular when the fuse link's tripping current causes the fuse element to melt and thus the fuse link to trip. It is conceivable that the tripping current could be exceeded briefly without the fuse element melting.
  • the fuse link's tripping time generally depends on the extent to which the tripping current is exceeded.
  • the tripping current and the tripping time of the fuse link depend on the fuse link's tripping characteristics.
  • the tripping current is generally several times the rated current of the circuit to be protected. Preferably, the tripping current is at least 1.05 times the rated current of the circuit to be protected.
  • the protective device does not have a secondary current path connected in parallel to the current path or in sections connected in parallel to the current path. This ensures that if the current path is interrupted, the circuit is interrupted. This ensures fail-safe behavior because if the fuse link is triggered, current flow between the input terminal and the output terminal is reliably prevented. If a secondary current path existed that, for example, bridged the fuse link, current could still flow from the input terminal to the output terminal if the fusible element had melted, namely via the secondary current path. As a result, the fail-safe behavior of the fuse link would not be effective in protecting the current flow from the input terminal to the output terminal due to the current flow via the secondary current path.
  • the protective device, in particular the monitoring device, and/or the fuse link are designed in such a way that, in the event of an overcurrent, the fusible element is at least partially melted before the triggering mechanism is triggered.
  • This is considered advantageous in that when the contacting elements are switched a lower current needs to be switched. This can, for example, reduce contact erosion of the contacting elements.
  • a fast tripping characteristic of the protective device can be achieved, particularly in DC applications, by using fuse links with the corresponding fast characteristic, for example fuses of the following operating classes: ar fuse, gr fuse, aBat fuses, gBat fuses or gS fuses.
  • the protective device is configured to trigger the tripping mechanism before the fusible link completely melts, in order to interrupt the current path as quickly as possible by separating the contact elements.
  • an overcurrent may occur in the current path and the fusible link melts, but the tripping mechanism is triggered during the melting process in order to achieve complete galvanic isolation as quickly as possible by opening the load-break switch, especially if the tripping mechanism has a certain inertia or requires a certain amount of time to trip.
  • the measuring electronics can be configured to detect certain predefined current and voltage curves in the current path based on the electrical measured value(s) acquired by the measuring device, which are characteristic of the occurrence of an overcurrent. For example, an overcurrent could be detected based on a temporal current gradient. A particularly steep current increase is usually an indication of a short circuit and thus an indication of an existing overcurrent.
  • the switchable contacting elements of the load-break switch can be transferred from a disconnected position, in which the contacting elements are spaced apart from one another and thus an electrical contact between the contacting elements is interrupted, into a contact position, in which the contacting elements contact one another and an electrical contact between the Contacting elements are present, and vice versa for switching the load-break switch, wherein the triggering mechanism is designed to transfer the contacting elements from the contact position to the disconnected position when the triggering mechanism is triggered.
  • the trigger mechanism preferably acts mechanically on the contacting elements.
  • the evaluation electronics are set up to decide, based on a variable limit value for the corresponding electrical measured variable, whether an overcurrent in the current path is imminent, present, or has occurred. In principle, however, it is considered advantageous if the evaluation electronics are set up to record the temporal progression of the measured variable or variables and to infer the presence of an overcurrent based on the temporal progression, for example, based on the gradient of the voltage drop across the fuse link. It is entirely conceivable that, particularly in DC applications, during normal operation the voltage drop across the fuse link will be close to 0 V or only a few volts due to the fuse link's low internal resistance.
  • the voltage drop across the fuse link will also increase due to the rising fuse element temperature and the sharp rise in current.
  • the fuse element melts at one or more constrictions the subsequent arcs across the melted constrictions and the associated arc impedance lead to a further sharp increase in the voltage drop.
  • This temporal progression of the voltage drop across the fuse link can be detected by the evaluation electronics and converted into a trigger pulse for the tripping mechanism.
  • the switch-disconnector then interrupts the remaining (residual) short-circuit current and ensures safe separation of the current path by separating the switchable contacting elements of the switch-disconnector, in particular by moving the contacting elements to the disconnected position.
  • the monitoring device is designed as a fuse monitoring device, wherein the fuse monitoring device is designed to detect a voltage drop across the fuse link.
  • the evaluation electronics are configured to detect the occurrence of an overcurrent based on a temporal development of the voltage drop across the fuse link. It is entirely conceivable that a voltage curve characteristic of an overcurrent for the fuse link used is stored in a memory of the evaluation electronics, wherein the evaluation electronics are configured to compare the voltage drop across the fuse link detected by the measuring device with the stored characteristic voltage curve and, based on the result of the comparison, to assess whether an overcurrent is imminent or present, which would lead to the melting of the fusible element in the fuse link. It is considered particularly advantageous if the evaluation electronics are programmable in order to adapt to different operating conditions, for example to adapt threshold values for the voltage drop and/or voltage curves that characterize the presence of an overcurrent to the fuse link used.
  • the protective device according to the invention offers particular advantages, particularly in direct current applications, due to the combination of a fuse link with a fusible element and a series-connected load-break switch. Accordingly, it is considered particularly advantageous if the protective device is used in direct current applications or is designed as a direct current protective device.
  • the protective device is designed as a two-pole device with a positive current path and a negative current path, wherein the positive current path is a positive main current path and wherein the negative current path is a negative main current path.
  • the respective current path a fuse holder for receiving a fuse link with a fusible element and a load-break switch connected in series with the fuse holder and having mechanically switchable contacting elements, wherein the respective load-break switch is coupled to a triggering mechanism in such a way that, when the triggering mechanism is triggered, the switchable contacting elements of the load-break switch are separated to interrupt the respective current path
  • the monitoring device is designed to monitor the positive and/or the negative current path, wherein the monitoring device is designed to trigger at least one of the triggering mechanisms, preferably to trigger the respective triggering mechanism, to interrupt the positive and/or negative current path by separating the contacting elements of the respective load-break switch.
  • the spatial arrangement of the components namely the fuse holder(s) or fuse links and the switch-disconnector(s), can be configured in different ways. It is considered particularly advantageous if the fuse holder(s) or fuse links and the switch-disconnector(s) are housed in one and the same housing.
  • the release mechanism has a preloadable mechanical energy storage device.
  • the preloadable mechanical energy storage device is preferably one or more mechanical springs.
  • the protective device in principle, it is conceivable for the protective device to have an electric motor, with the electric motor being configured to preload the mechanical energy storage device.
  • preloading of the energy storage device is preferably done manually, for example, using a hand-operated rotary lever.
  • the protective device has a mechanically, preferably manually, actuated actuating device for transferring the contacting elements of the load-break switch from the disconnected position to the contact position and vice versa.
  • This actuating mechanism is preferably an assembly independent of the tripping mechanism. This enables the load-break switch to switch, thus enabling the circuit to be interrupted even without an overcurrent and without triggering the tripping mechanism, and thus closing the current path and thus the circuit.
  • the operating mechanism can also be operated by a motor instead of manually.
  • the protective device has a locking element, wherein the locking element is coupled to the energy accumulator of the triggering mechanism and interacts with the actuating device in such a way that, when the energy accumulator is relaxed, the locking element prevents the switch-disconnector from being transferred from the open to the closed switching position by mechanically blocking the actuating device.
  • the actuating device is coupled to the energy storage device of the tripping mechanism in such a way that when the actuating device is actuated to transfer the switchable contacting elements of the load-break switch from the open to the closed switching position, the energy storage device of the tripping mechanism is pretensioned.
  • the measuring device comprises one or more voltage sensors and/or one or more current sensors.
  • the current sensor can be a Rogowski coil, a Hall sensor, or a measuring method using semiconductor sensors.
  • the voltage sensor can be a conventional direct contact or a voltage tap, as described in the patent specification EP 3 671 792 A1 is known, the contents of which are hereby incorporated into this application. It is quite conceivable that the measuring device does not measure absolute values of the current and/or voltage, but merely changes in the current and/or voltage.
  • the protective device is a low-voltage protective device and the protective device is suitable for use with a direct voltage in the range of 75 volts to 1500 volts (according to the Low Voltage Directive 2014/35/EU) and with a current in the range of up to 1600A, preferably from 6A to 1600A.
  • the fuse link has a contact blade.
  • the fuse holder(s) are fuse holders for NH fuse links (low-voltage high-performance fuse links).
  • the contact bridge can be trapezoidal, wherein the base elements consist of trapezoidally facing plate contacts, wherein the base elements are designed to accommodate the trapezoidal contact bridge in the contact position.
  • the switch-disconnector Due to the very low time constants in a DC circuit, closing the switch-disconnector usually results in a very steep current rise. This can lead to arcing between the contact elements during the switch-disconnector closing process, resulting in significant material removal on the switchable contact elements of the switch-disconnector and thus contact wear, and possibly even a Welding of the switchable contacting elements can occur due to the high current flow. For example, welding of the movable contact blade and one or both base elements can occur. Accordingly, it is considered particularly advantageous if the switch-disconnector has a contact system in which the largest possible electrical contact area is formed immediately without any delay at the moment of electrical contact between the contacting elements of the switch-disconnector.
  • the switchable contacting elements of the switch-disconnector has a permanent contact and a sacrificial contact, whereby in the contact position the current flows via the permanent contact, and during a switching operation the current flows temporarily via the sacrificial contact in order to protect the permanent contact from arcing when switching.
  • the sacrificial contact allows for controlled arc guidance to non-critical surfaces. In a design with a movable bridge contact and fixed base elements, at least one of the base elements has such a sacrificial contact and a permanent contact.
  • the protective device has an electrical circuit for limiting or reducing a current flow when the load-break switch is switched on, this electrical circuit being connected in series with the load-break switch, the electrical circuit having an inductance and an electromagnetic switching contact connected in parallel with the inductance, the electromagnetic switching contact being controlled in such a way that when the load-break switch is closed, the electromagnetic switching contact is in a disconnected position, so that the current flow via the parallel-connected Inductance occurs, whereby after reaching the contact position of the load break switch, the electromagnetic switching contact is controlled in such a way that the electromagnetic switching contact changes from the disconnected position to the contact position.
  • an inductance is connected in series with the load-break switch, wherein an electromagnetic switching contact is arranged in parallel with the inductance, which is closed as soon as the load-break switch has reached the contact position, wherein the monitoring device immediately after reaching the contact position of the load-break switch applies a voltage to the electromagnetic switching contact, which transfers the electromagnetic switching contact from the disconnected position to the contact position.
  • the protective device 3 is here two-pole and has a positive main current path 4, hereinafter referred to as positive current path 4, and a negative main current path 5, hereinafter referred to as negative current path 5, wherein the respective current path 4, 5 has a fuse holder for receiving a fuse link 6 with a melting fuse.
  • a load-break switch 7 is connected in series to the respective fuse holder 6, wherein this load-break switch 7 has mechanically switchable contacting elements which can be transferred from a disconnected position in which the respective current path 4, 5 is interrupted, to a contact position in which the respective current path 4, 5 is closed.
  • the load-break switch 7 is shown in the circuit diagram of Fig.
  • the respective load-break switch 7 is coupled to a tripping mechanism 8 such that when the tripping mechanism 8 is triggered, the switchable contacting elements of the load-break switch 7 are transferred from the contact position to the disconnected position to interrupt the respective current path 4, 5.
  • a flow of current from a positive input terminal assigned to the positive current path 4 to a positive output terminal assigned to the positive current path 4 can only occur via the positive current path 4.
  • the protective device 3 does not have a positive secondary current path connected in parallel to the positive current path 4 or in sections parallel to the positive current path 4, through which current could flow from the positive input terminal to the positive output terminal, for example if the positive current path 4 is interrupted.
  • a flow of current from the positive input terminal to the positive output terminal is therefore only possible via the positive current path 4. This ensures that if the positive current path 4 is interrupted, for example, by moving the load-break switch 7 from the contact position to the disconnected position and/or by triggering the fuse, no current can flow from the positive input terminal to the positive output terminal. The same applies to the negative current path 5.
  • the protective device 3 comprises a monitoring device 9 for each current path 4, 5, wherein this monitoring device 9 is configured to detect the occurrence of an overcurrent in the respective current path 4, 5.
  • the respective monitoring device 9 has a measuring device configured to detect the voltage drop across the respective fuse link 6, wherein the monitoring device 9 further comprises evaluation electronics which is configured to detect the presence of an overcurrent, in particular a short-circuit current, in the respective current path 4, 5 based on the temporal progression of the voltage drop across the respective fuse link 6.
  • the monitoring device 9 is configured to trigger the respective triggering mechanism 8 upon detection of the occurrence of an overcurrent in the respective current path 4, 5 and thereby actuate the contacting elements and thereby interrupt the corresponding current path 4, 5.
  • the advantage of the protective device 3 according to the invention for protecting a DC circuit is that the disadvantages associated with the use of a fuse link 6 with a fusible element in a DC circuit are compensated for by the load-break switch 7 connected in series with the fuse link 6. Furthermore, the triggering of the load-break switch 7 creates a safe disconnection point so that no current can flow through the respective current path 4, 5, thereby interrupting the circuit. Since the load-break switch 7 is connected in series with the fuse link 6, it is not necessary for the load-break switch 7 or the triggering mechanism 8 to trigger particularly quickly or swiftly, since this is already achieved by the fusible element. Furthermore, the load-break switch 7 does not have to be designed to switch particularly high currents, since the current intensity is already reduced by the triggering of the fuse.
  • the Fig. 3 shows a further embodiment of the protective device 3, which differs from the embodiment according to the Fig. 2 essentially differs in that only in the positive current path 4 there is a load-break switch 7, which is coupled to a tripping mechanism 8 and has a monitoring device 9, and a series-connected fuse holder with a fuse link 6 with a fusible element, while the negative current path 5 has only one load-break switch 7 and a series-connected fuse holder with a fuse link 6 with a fusible element.
  • this load-break switch 7 in the negative current path can also be mechanically coupled to the load-break switch 7 in the positive current path, so that they are actuated together when the tripping conditions in the positive current path are present.
  • the Fig. 4 shows components of a switchable contact system of the load-break switch 7 of the protective device 3.
  • the contact system comprises a first group 10 of switchable contacting elements and a second group 11 of switchable contacting elements.
  • the first group 10 is arranged between an input contact 12 of the fuse holder and the input terminal of the protective device 3, and the second group 11 is arranged between an outgoing contact 13 of the fuse holder and the output terminal of the protective device 3.
  • a fuse link 6 designed as an NH fuse link is inserted into the fuse holder.
  • the respective group 10, 11 comprises switchable contacting elements, wherein these switchable contacting elements comprise two spatially separated, fixedly arranged base elements 14a, 14b and a contact bridge 16 movable along the double arrow 15.
  • the contact bridge 16 is designed as a contact blade, and the two base elements 14a, 14b have a receiving slot for receiving the contact bridge 16 in the contact position.
  • the contact bridge 16 is retracted into the receiving slots of the two base elements 14a, 14b, and the base elements 14a, 14b are then electrically connected to one another via the contact bridge 16.
  • the disconnected position which is Fig. 4
  • the contact bridge 16 is arranged at a distance from the two base elements 14a, 14b and thus the load-break switch 7 is in the disconnected position.
  • the contact position is in the Fig. 5 shown.
  • the respective base element has a permanent contact surface in the region of the slot and a rod-shaped pre-contact 17 that contacts the contact bridge 16 during closing.
  • the pre-contact 17 forms a sacrificial contact to prevent an arc on the permanent contact surface and thereby protect the permanent contact surface from arcing during switching.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP24198928.4A 2023-09-08 2024-09-06 Appareil de protection pour interrompre un circuit lors de la surintensité Pending EP4521436A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23196304.2A EP4521435A1 (fr) 2023-09-08 2023-09-08 Appareil de protection pour interrompre un circuit électrique en cas de surintensité

Publications (1)

Publication Number Publication Date
EP4521436A1 true EP4521436A1 (fr) 2025-03-12

Family

ID=88016576

Family Applications (2)

Application Number Title Priority Date Filing Date
EP23196304.2A Pending EP4521435A1 (fr) 2023-09-08 2023-09-08 Appareil de protection pour interrompre un circuit électrique en cas de surintensité
EP24198928.4A Pending EP4521436A1 (fr) 2023-09-08 2024-09-06 Appareil de protection pour interrompre un circuit lors de la surintensité

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP23196304.2A Pending EP4521435A1 (fr) 2023-09-08 2023-09-08 Appareil de protection pour interrompre un circuit électrique en cas de surintensité

Country Status (1)

Country Link
EP (2) EP4521435A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5426406A (en) * 1993-10-10 1995-06-20 General Electric Company Induction motor protective circuit breaker unit
EP0496212B1 (fr) 1991-01-25 1996-04-10 JEAN MÜLLER GmbH ELEKTROTECHNISCHE FABRIK Mécanisme de commutation pour un interrupteur électrique
EP1439558A1 (fr) 2002-02-16 2004-07-21 Jean Müller GmbH Elektrotechnische Fabrik Arrangement des contacts pour un interrupteur électrique
DE102011089631A1 (de) 2011-12-22 2013-06-27 Siemens Aktiengesellschaft Leistungsschalter
DE102014004912A1 (de) * 2014-04-07 2015-10-08 Energijski Konduktorji D.O.O. Schutzgerät und Schutzsysteme für Stromkreise sowie Verfahren zur Steuerung des Schutzsystems
FR3021465A1 (fr) * 2014-05-21 2015-11-27 Cahors App Elec Bloc de protection pour disjoncteur de protection d'un depart basse tension, notamment alimente par un transformateur sur poteau
EP3671792A1 (fr) 2018-12-19 2020-06-24 Jean Müller GmbH Elektrotechnische Fabrik Prise électrique doté d'un dispositif de protection contre les surintensités ainsi qu'agencement d'un composant de distribution d'énergie et d'une prise électrique
EP3724909A1 (fr) * 2017-12-15 2020-10-21 Jozef Smrkolj Disjoncteur de protection de puissance intelligent
EP3840008A1 (fr) * 2019-12-16 2021-06-23 Strip's d.o.o. Dispositif de mesure multiple et disjoncteur de protection de circuit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496212B1 (fr) 1991-01-25 1996-04-10 JEAN MÜLLER GmbH ELEKTROTECHNISCHE FABRIK Mécanisme de commutation pour un interrupteur électrique
US5426406A (en) * 1993-10-10 1995-06-20 General Electric Company Induction motor protective circuit breaker unit
EP1439558A1 (fr) 2002-02-16 2004-07-21 Jean Müller GmbH Elektrotechnische Fabrik Arrangement des contacts pour un interrupteur électrique
DE102011089631A1 (de) 2011-12-22 2013-06-27 Siemens Aktiengesellschaft Leistungsschalter
DE102014004912A1 (de) * 2014-04-07 2015-10-08 Energijski Konduktorji D.O.O. Schutzgerät und Schutzsysteme für Stromkreise sowie Verfahren zur Steuerung des Schutzsystems
FR3021465A1 (fr) * 2014-05-21 2015-11-27 Cahors App Elec Bloc de protection pour disjoncteur de protection d'un depart basse tension, notamment alimente par un transformateur sur poteau
EP3724909A1 (fr) * 2017-12-15 2020-10-21 Jozef Smrkolj Disjoncteur de protection de puissance intelligent
EP3671792A1 (fr) 2018-12-19 2020-06-24 Jean Müller GmbH Elektrotechnische Fabrik Prise électrique doté d'un dispositif de protection contre les surintensités ainsi qu'agencement d'un composant de distribution d'énergie et d'une prise électrique
EP3840008A1 (fr) * 2019-12-16 2021-06-23 Strip's d.o.o. Dispositif de mesure multiple et disjoncteur de protection de circuit

Also Published As

Publication number Publication date
EP4521435A1 (fr) 2025-03-12

Similar Documents

Publication Publication Date Title
DE102011056577B3 (de) Schaltungsanordnung zur Unterdrückung eines bei einem Schaltvorgang auftretenden Lichtbogens
EP2774237B1 (fr) Système de batterie
WO2010089338A2 (fr) Dispositif de protection contre les courts-circuits et circuiterie présentant un dispositif de protection de ce type
EP3047556A2 (fr) Circuit pour onduleur photovoltaïque permettant l'équilibrage d'une mise hors circuit au moyen d'interrupteurs de court-circuit, et utilisations du circuit
EP3542386B1 (fr) Disjoncteur basse tension
DE2854616C2 (de) Selektivschutzeinrichtung
EP3166193B1 (fr) Dispositif de coupure pour appareils de protection contre des surtensions
DE102006042768A1 (de) Verfahren zum Betreiben eines elektrischen Schutzschalters und nach diesem Verfahren betriebener elektrischer Schutzschalter
DE102013012578A9 (de) Vorrichtung zum Absichern einer elektrischen Leitung
EP0023277A1 (fr) Dispositif de protection sélective
EP3347959B1 (fr) Dispositif de coupure sûre côté réseau, indépendamment d'appareils de distribution et de fusibles auxiliaires, de moyens de protection contre les surtensions en cas d'états de fonctionnement critiques
EP0013320B1 (fr) Interrupteur de protection de ligne principale utilisé comme interrupteur de protection de groupe
EP0453776B1 (fr) Mécanisme de couplage avec disjoncteur ou sectionneur de charge et fusible
DE19834474A1 (de) Einrichtung zum Kurzschlußschutz
EP4521436A1 (fr) Appareil de protection pour interrompre un circuit lors de la surintensité
DE102009031138B4 (de) Schalteinrichtung
EP3437169B1 (fr) Agencement de circuits à fonction de déconnexion à minimum ou maximum de tension pour la protection de consommateurs, raccordés à un réseau polyphasés
DE102008047256A1 (de) Gesteuerte Hochspannungssicherung und Hochspannungsschalter-/Sicherungskombination
DE102004062267A1 (de) Verfahren und Vorrichtung zum sicheren Betrieb eines Schaltgerätes
DE102015207802A1 (de) Auslösung eines Störlichtbogenschutzsystems
DE102015106867A1 (de) Auslösung eines Erdungsschalters einer Schaltanlage
EP3327742A1 (fr) Dispositif d'extinction d'un arc électrique et disjoncteur électromécanique
EP4176459B1 (fr) Mécanisme de commutation à ressort compact indépendant de l'opérateur et dispositif de commutation de protection électromécanique
DE202012000339U1 (de) Elektrische Abtrennvorrichtung
DE102016001767A1 (de) Schalteinrichtung für Überspannungsschutzgeräte

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

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

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR