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EP4377980A1 - Disjoncteur et procédé - Google Patents

Disjoncteur et procédé

Info

Publication number
EP4377980A1
EP4377980A1 EP21786801.7A EP21786801A EP4377980A1 EP 4377980 A1 EP4377980 A1 EP 4377980A1 EP 21786801 A EP21786801 A EP 21786801A EP 4377980 A1 EP4377980 A1 EP 4377980A1
Authority
EP
European Patent Office
Prior art keywords
low
current
unit
voltage circuit
switching 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.)
Pending
Application number
EP21786801.7A
Other languages
German (de)
English (en)
Inventor
Marvin TANNHÄUSER
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP4377980A1 publication Critical patent/EP4377980A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/548—Electromechanical and static switch connected in series
    • 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
    • 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
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers

Definitions

  • Low voltage means voltages of up to 1000 volts AC or up to 1500 volts DC. Low voltage means, in particular, voltages that are greater than extra-low voltage, with values of 50 volts AC or 120 volts DC, are .
  • low-voltage circuit or network or system are circuits with rated currents or Rated currents of up to 125 amps, more specifically up to 63 amps.
  • low-voltage circuits are circuits with rated currents or Rated currents of up to 50 amps, 40 amps, 32 amps, 25 amps, 16 amps or 10 amps.
  • the current values mentioned mean in particular nominal, rated and/or cut-off currents, i. H . the maximum current that is normally conducted through the circuit or where the electrical circuit is usually interrupted, for example by a protective device such as a protective switching device, miniature circuit breaker or circuit breaker.
  • Miniature circuit breakers have long been known overcurrent protection devices that are used in electrical installation technology in low-voltage circuits. These protect lines from damage caused by heating due to excessive current and/or short circuits.
  • a circuit breaker can switch off the circuit in the event of an overload and/or short- switch off automatically at the end.
  • a circuit breaker is a non-automatically resetting safety element.
  • circuit breakers In contrast to miniature circuit breakers, circuit breakers are intended for currents greater than 125 A, sometimes even from 63 amperes. Miniature circuit breakers are therefore simpler and more filigree in design . Miniature circuit breakers usually have a mounting option for mounting on a so-called top-hat rail (mounting rail, DIN rail, TH35).
  • Miniature circuit breakers are built electromechanically. In a housing, they have a mechanical switching contact or Shunt trip for interrupting (tripping) the electrical current on .
  • a bimetallic protective element or Bimetallic element used for tripping (interruption) in the event of prolonged overcurrent (overcurrent protection) or thermal overload (overload protection).
  • An electromagnetic release with a coil is used for short-term release when an overcurrent limit value is exceeded or used in the event of a short circuit (short circuit protection) .
  • One or more arc quenching chamber(s) or . Arc extinguishing devices are provided. Furthermore, connection elements for conductors of the electrical circuit to be protected.
  • Protective switching devices with an electronic interrupting unit are relatively new developments. These have a semiconductor-based electronic interruption unit. D. H .
  • the electrical current flow of the low-voltage circuit is routed via semiconductor components or semiconductor switches, which interrupt or switch off the electrical current flow. can be switched to be conductive.
  • Protective switching devices with an electronic interruption unit also often have a mechanical isolating contact system, in particular with isolating properties according to relevant standards for low-voltage circuits, the contacts of the mechanical isolating contact system in series with the electronic Interruption unit are switched, d. H .
  • the current of the low-voltage circuit to be protected is routed both via the mechanical isolating contact system and via the electronic interrupting unit.
  • the present invention relates in particular to low-voltage AC circuits with an AC voltage, usually with a time-dependent sinusoidal AC voltage with the frequency f.
  • the object of the present invention is to improve a protective switching device of the type mentioned at the outset, in particular to improve or improve the functionality of such a protective switching device. show a new concept for such a protective switching device.
  • a protective switching device for protecting an electrical low-voltage circuit, in particular a low-voltage alternating current circuit, having:
  • a mechanical isolating contact unit which has an open state of contacts to prevent a current flow in the low-voltage circuit or a closed state of the contacts for a current flow in the low-voltage circuit, so that (in particular) a galvanic isolation in the low-voltage circuit can be switched, with a mechanical one isolating contact unit, opening the contacts is also referred to as disconnecting and closing the contacts is referred to as connecting;
  • the mechanical isolating contact unit has in particular a mechanical handle with which the mechanical isolating contact unit can be operated, so that the contacts can be opened or closed;
  • an electronic interrupting unit which is connected in series with the mechanical isolating contact unit on the circuit side and which has a high-impedance state of the switching elements to avoid a current flow or a low-impedance state of the switching elements for a current flow in the low-voltage circuit due to semiconductor-based switching elements
  • a high-impedance (especially non-conductive) state of the switching elements is also referred to as the switched-off state (process: switching off) and a low-impedance (conductive) state of the switching elements (for current flow) as a switched-on state (Procedure : switching on) denotes ,
  • a control unit which is connected to the current sensor unit, the mechanical isolating contact unit and the electronic interrupter unit, with current limit values or current time limit values being exceeded avoiding a current flow in the low-voltage circuit being initiated.
  • the protective switching device has, for example, a communication interface, specifically a communication interface connected to the control unit.
  • the communication interface is intended for a configuration of the protective switching device, i . H .
  • a configuration can be carried out by means of the communication interface.
  • the type of avoidance of a current flow in the low-voltage circuit can be configured for exceeding at least one parameter.
  • the type of parameter can be, for example, the electric current, the voltage, the temperature, a value for detecting a serial arc fault, the resistance, the impedance, o . uh . be .
  • the electronic interrupting unit can be configured to become highly resistive.
  • Z. B. can be configured for a second current limit or current time limit as a current flow-avoiding type of high resistance of the electronic interruption unit and an open state of the contacts of the mechanical isolating contact unit.
  • an open state of the contacts of the mechanical isolating contact unit can be configured for a third current limit value or current time limit value as a current flow-avoiding type.
  • a voltage sensor unit connected to the control unit is provided for determining the magnitude of the voltage in the low-voltage circuit.
  • a temperature sensor unit connected to the control unit is provided for determining the level of the temperature of the protective switching device.
  • a differential current sensor connected to the control unit such as a summation current transformer, is provided for determining the level of a differential current in the low-voltage circuit.
  • a configuration memory is provided for non-volatile (maintenance in the de-energized state) storage of the configuration of the type of avoidance of the current flow of the low-voltage circuit.
  • the configuration memory can be part of or connected to the control unit.
  • a display unit connected to the control unit is provided, in particular for displaying the (high-impedance or low-impedance) state of the switching elements of the electronic interrupting unit . More specifically, the position of the contacts of the mechanical isolating contact unit can also be displayed.
  • the type of avoidance of a current flow can be configured with regard to a first, second and/or third current limit value (as a parameter).
  • a determined current that exceeds a first current threshold value for a first period of time and/or a determined current that exceeds a second current threshold value for a second period of time and/or for a determined current that exceeds a third current threshold value exceeds in each case the type of avoidance of a current flow is configurable.
  • the type of avoidance of a current flow can be configured with regard to one of the following parameters, in particular several or all of the following parameters:
  • the electronic interruption unit can become highly resistive or a galvanic isolation can be configured and/or
  • the electronic interruption unit can become highly resistive or a galvanic isolation can be configured and/or
  • the electronic interruption unit can become highly resistive or a galvanic isolation can be configured and/or
  • the electronic interruption unit can become highly resistive or a galvanic isolation can be configured and/or
  • the electronic interrupter unit can be configured to have a high resistance or a galvanic isolation, in particular if the voltage level is greater than a second undervoltage value, and/or
  • the electronic interruption unit can become highly resistive or a galvanic isolation can be configured and/or - that when the second temperature limit value is exceeded, the electronic interruption unit can become highly resistive or a galvanic isolation can be configured and/or
  • the electronic interruption unit can become highly resistive or a galvanic isolation can be configured and/or
  • the electronic interruption unit can become highly resistive or a galvanic isolation can be configured and/or
  • the electronic interruption unit can become highly resistive or a galvanic isolation can be configured.
  • an input function connected to the control unit is provided, in particular for acknowledging a high-impedance state of the switching elements of the electronic interruption unit after an overshoot or Falling below a parameter so that current can flow again in the low-voltage circuit.
  • an acknowledgment of a high-impedance state of the switching elements of the electronic interruption unit in particular after an overshoot or Falling below a parameter, it is feasible that after an acknowledgment
  • An open state or closed state of the isolating contacts of the mechanical isolating contact unit can be configured.
  • rupture unit to be configurable depending on the parameter.
  • the method for a circuit breaker protecting a low voltage electrical circuit comprising:
  • a mechanical isolating contact unit which has an open state of contacts to prevent a current flow in the low-voltage circuit or a closed state of the contacts for a current flow in the low-voltage circuit;
  • An electronic interrupting unit which is connected in series with the mechanical isolating contact unit on the circuit side and which has a high-impedance state of the switching elements to avoid a current flow or a low-impedance state of the switching elements for a current flow in the low-voltage circuit due to semiconductor-based switching elements; wherein the magnitude of the current in the low-voltage circuit is determined and, if current limit values or current-time limit values are exceeded, avoidance of a current flow in the low-voltage circuit is initiated.
  • the type of avoidance of a current flow in the low-voltage circuit can be configured for at least one parameter.
  • a parameter is exceeded (or not reached) a configuration with regard to a high-impedance state of the switching elements of the electronic interruption unit or -an open state of the contacts of the mechanical isolating contact unit are carried out.
  • the computer program product includes commands which, when the program is executed by a microcontroller, cause the latter to configure the type of avoidance of current flow in the low-voltage circuit for a protective switching device according to one of the claims.
  • the microcontroller is part of the protective switching device, in particular the control unit.
  • a corresponding computer-readable storage medium on which the computer program product is stored is claimed.
  • Figure 1 is a first representation of a protective switching device
  • Figure 2 shows a second representation of a protective switching device
  • FIG. 3 shows a first representation of states of a protective switching device
  • FIG. 4 shows a second representation of states of a protective switching device
  • FIG. 5 shows a first representation of a diagram with a current-time characteristic
  • Figure 6 shows a third representation of states of a protective switching device.
  • FIG. 1 shows an illustration of a protective switching device SG for protecting an electrical low-voltage circuit, having:
  • the load-side connection L2, N2 can have a passive load (consumer) and/or an active load ((further) energy source), or a load that can be both passive and active, e.g. B. in chronological order ;
  • an optional voltage sensor unit SU for determining the magnitude of the voltage of the low-voltage circuit, see above that in particular instantaneous (phase angle related) voltage values DU are present,
  • a mechanical isolating contact unit MK which can be operated and switched in particular by a mechanical handle, so that opening of contacts to avoid a current flow or closing of the contacts for a current flow in the low-voltage circuit (in particular by the handle) can be switched, thus (in particular) a galvanic separation in the low-voltage circuit can be switched;
  • opening of contacts is also referred to as disconnection and closing of contacts as connection;
  • an electronic interruption unit EU which is connected in series with the mechanical isolating contact unit MK on the circuit side and which, due to semiconductor-based switching elements, has a high-impedance state of the switching elements to prevent current flow and a low-impedance state of the switching elements to current flow in the low-voltage circuit; in the case of the electronic interruption unit EU, a high-resistance state of the switching elements (to prevent current flow) is also referred to as the switched-off state (process: switching off) and a low-resistance (conductive) state of the switching elements (for current flow) as the switched-on state (process: switching on). ;
  • control unit which is connected to the current sensor unit (SI), the mechanical isolating contact unit (MK) and the electronic interrupting unit (EU), whereby when current limit values or current time limit values are exceeded (i.e. if a current limit is exceeded for a certain period of time) avoidance of a current flow in the low-voltage circuit is initiated, in particular to avoid a short-circuit current.
  • the line-side connections LI, NI are connected on the one hand to the mechanical isolating contact unit MK.
  • the mechanical isolating contact unit MK is connected to the electronic interruption unit EU.
  • the electronic interruption unit EU is connected to the connections L2, N2 on the load side.
  • the voltage sensor unit SU and the current sensor unit S T are arranged between the mechanical isolating contact unit MK and the electronic interruption unit EU.
  • the protective switching device SG can have an energy supply with a power pack NT (not shown in FIG. 1).
  • the power pack NT serves to supply energy to the control unit SE and/or the electronic interrupter unit EU and, if applicable, the voltage sensor SU and/or current sensor S T .
  • the computer program product can advantageously be stored on a computer-readable storage medium; such as a USB stick, CD-ROM, etc. ; be saved, e.g. B. allow an upgrade to an enhanced version.
  • the computer program product can also advantageously be transmitted by a data carrier signal.
  • the protective switching device SG in particular the control unit SE, is designed such that when parameters are exceeded, such as B.
  • Current limit values or current time limit values i.e. if a current limit value is exceeded for a specific period of time
  • avoidance of a current flow in the low-voltage circuit is initiated, in particular in order to avoid a short-circuit current in the example. This is achieved in particular by the electronic interruption unit EU changing from the low-impedance state to the high-impedance state.
  • the avoidance of a current flow in the low-voltage circuit is initiated, for example, by a first interrupt signal TRIP that is sent from the control unit SE to the electronic interrupter unit EU, as shown in FIG.
  • the avoidance of a current flow in the low-voltage circuit can be initiated, for example, by a second interrupt signal TRIPG that is sent from the control unit SE to the mechanical isolating contact unit MK in order to open the contacts, as shown in FIG.
  • a second interrupt signal TRIPG that is sent from the control unit SE to the mechanical isolating contact unit MK in order to open the contacts, as shown in FIG.
  • the protective switching device (SG) is designed in such a way that if at least one parameter, such as e.g. B. a current limit value, in particular z. B. several current limit values, or z . B. at least one current time limit, in particular z. B. several current time limit values, the type of avoidance of a current flow (through the electronic interruption unit (EU) or (/and) the mechanical isolating contact unit (MK)) is configurable.
  • at least one parameter such as e.g. B. a current limit value, in particular z. B. several current limit values, or z . B. at least one current time limit, in particular z. B. several current time limit values.
  • the electronic interruption unit EU is drawn in as a block in both conductors.
  • At least one leader, especially the active leader resp. tive phase conductor, has semiconductor-based switching elements.
  • the neutral conductor can be free of switching elements, ie without semiconductor-based switching elements. This means that the neutral conductor is connected directly, ie it does not become highly resistive. Ie there is only a single-pole interruption (of the phase conductor). If further active conductors/phase conductors are provided, the phase conductors have semiconductor-based switching elements in a second variant of the electronic interruption unit EU.
  • the neutral conductor is connected directly, ie it does not become highly resistive. For example for a three-phase AC circuit.
  • the neutral conductor can also have a semiconductor-based switching element, i.e. when the electronic interruption unit EU is interrupted, both conductors become highly resistive.
  • the electronic interruption unit EU can have semiconductor components such as bipolar transistors, field effect transistors (FET), isolated gate bipolar transistors (IGBT), metal oxide layer field effect transistors (MOSFET) or other (self-guided) power semiconductors.
  • IGBTs and MOSFETs in particular are particularly well suited for the protective switching device according to the invention due to low flow resistances, high junction resistances and good switching behavior.
  • the mechanical isolating contact unit MK can interrupt on a single pole. This means that only one of the two conductors, in particular the active conductor or phase conductor, is interrupted, i.e. there is mechanical contact. The neutral conductor is then contact-free, i.e. the neutral conductor is directly connected.
  • phase conductors have mechanical contacts of the mechanical isolating contact system.
  • neutral conductor is directly connected in this second variant. For example for a three-phase AC circuit.
  • the neutral conductor also has mechanical contacts, as shown in FIG.
  • the mechanical isolating contact unit MK means, in particular, a (standard-compliant) isolating function, implemented by the isolating contact unit MK.
  • the points are: -minimum clearance according to standard (minimum distance between the contacts), -contact position display of the contacts of the mechanical isolating contact system, -actuation of the mechanical isolating contact system (by the handle) is always possible (no blocking of the isolating contact system), especially one Activation / tripping is possible at any time, i.e. in particular a trip-free trip (mechanical switching device with trip-free tripping) is meant, i.e. in particular a mechanical switching device whose moving contacts return to the open position and remain there when the opening (i.e. tripping) is initiated after the start of closing, even if the closing command is maintained.
  • a trip-free trip mechanical switching device with trip-free tripping
  • the DIN EN 60947 or IEC 60947 series of standards are relevant for the isolating function and its properties, to which reference is made here.
  • the isolating contact system is advantageously characterized by a minimum clearance of the opened isolating contacts in the opening (open position, open contacts) depending on the rated impulse withstand voltage and the degree of pollution.
  • the minimum clearance is in particular between (at least) 0.01 mm and 14 mm.
  • the minimum clearance is advantageously between 0.01 mm at 0.33 kV and 14 mm at 12 kV, in particular for pollution degree 1 and in particular for inhomogeneous fields.
  • the pollution degrees and field types correspond to those defined in the standards.
  • a standardized protective switching device that is dimensioned according to the rated surge withstand voltage can advantageously be achieved.
  • the protective switching device SG is designed according to the invention in such a way that the electronic interruption unit EU in the unlocked state, d. H . when the contacts of the mechanical isolating contact unit MK are open, has a high resistance.
  • FIG. 2 shows a protective switching device SG according to FIG. 1, with the following differences.
  • the electronic interrupting unit EU is designed as a single-pole interrupting unit.
  • the mechanical isolating contact unit MK is designed as a two-pole interrupting unit (galvanically interrupting).
  • the mechanical isolating contact unit MK has a handle HH with which the contacts can be opened or closed, so that the mechanical isolating contact unit can be operated.
  • the control unit SE is connected to a communication interface KS for configuring the protective switching device, in particular for configuring the type of avoidance of current flow when at least one current limit value or current-time limit value of the low-voltage circuit is exceeded.
  • the communication interface KS can be programmed by a user XY or an external device XY, so that the type of avoidance of a current flow can be configured.
  • the control unit SE can be connected to a display unit AE to display parameters or statuses of the protective switching device SG, in particular to display the status of the electronic interruption unit EU (high-impedance and/or low-impedance), specifically to display the status of the switching elements of the electronic interruption unit EU .
  • the control unit SE can be connected to an input unit QU, specifically, for example, an acknowledgment button for acknowledging states of the protective switching device, specifically states of the electronic interruption unit EU.
  • the control unit (SE) is connected to a configuration memory (SP) for non-volatile storage of the configuration of the type of avoidance of current flow of the low-voltage circuit (i.e. the configuration is stored in the de-energized state).
  • the configuration memory can be, for example, a flash memory, flash EPROM, NVRAM, FeRAM, MRAM or PCRAM.
  • the protective switching device SG can also have a summation current transformer for determining residual currents in the low-voltage circuit.
  • the type of current flow avoidance can also be configurable for exceeding residual current limits.
  • the protective switching device SG can also have one or more temperature sensors for determining the level of the temperature of the protective switching device SG.
  • the way of avoiding the current flow can be a
  • An example is shown in the following configuration table.
  • An error type is entered in the first column.
  • a short circuit is, for example, exceeding a current limit value.
  • Overload is, for example, exceeding a current time limit value.
  • Residual current is, for example, exceeding a residual current limit value (residual current value).
  • Overtemperature is, for example, exceeding a temperature limit.
  • Overvoltage is, for example, exceeding an overvoltage value.
  • Undervoltage is, for example, exceeding an undervoltage value.
  • Serial arcing is, for example, exceeding an arcing detection threshold value.
  • tripping behavior the type of avoidance of a current flow when the respective parameter (current limit value, current time limit value, residual current limit value, temperature limit value, overvoltage value, undervoltage value, ...) is exceeded is entered or configured (i.e. the tripping behavior). ) .
  • the switching elements of the electronic interruption unit EU become highly resistive (OFF) and the contacts of the mechanical isolating contact unit MK open (OFF).
  • the avoidance of current flow through the respective unit is marked here with OFF. While non-tripping of the respective unit when the parameter is exceeded, i.e. current flow in the low-voltage circuit, is marked with ON.
  • the switching elements of the electronic interruption unit EU are provided or configured to become high-impedance (OFF), but the contacts of the mechanical isolating contact unit MK are not opened, i.e. the contacts remain closed (ON).
  • the switching elements of the electronic interruption unit EU will become high-impedance (OFF) and the contacts of the mechanical isolating contact unit MK will open (OFF).
  • the switching elements of the electronic interruption unit EU are provided or configured to become high-impedance (OFF), but the contacts of the mechanical isolating contact unit MK are not opened, ie the Contacts remain closed (ON) .
  • OFF high-impedance
  • the contacts of the mechanical isolating contact unit MK are not opened, ie the Contacts remain closed (ON) .
  • the behavior for a value or Limit value of a parameter shown The behavior for a value or Limit value of a parameter shown.
  • the tripping behavior i . H . the type of current flow avoidance can be configured .
  • a first (lower) overvoltage value and a second (higher) overvoltage value For example, for a first (lower) overvoltage value and a second (higher) overvoltage value.
  • further parameters can be determined and configured, for example parameters of the load-side connection, in particular if the value falls below a first and/or second resistance value on the load side or a first and/or second impedance value on the load side.
  • the behavior of the protective switching device after a fault can also be configurable. This is shown as an example in the third column Reconnection .
  • the device can allow the current to flow again, this is marked as Automatic . D. H .
  • the electronic interruption unit automatically becomes low-impedance, for example after a (parameter-dependent) period of time has elapsed.
  • the device can allow the current to flow again, marked with Automatic . D. H .
  • the electronic interruption unit automatically becomes low-impedance, for example when the temperature has fallen below the temperature limit value.
  • an offset amount which may be a fixed temperature amount or a percentage, has fallen.
  • the device can allow the current to flow again, marked with Automatic . D. H . in the example, the electronic interruption unit automatically becomes low-impedance, for example when the overvoltage has ceased, d. H . has fallen below the overvoltage value. In an analogous manner for undervoltage.
  • the device can allow the current flow again if this state is acknowledged, this is marked with After acknowledgment.
  • D. H in the example, the electronic interrupter unit becomes low-impedance when the detection of a serial arc is acknowledged manually on the device by a user, so that a current flow in the low-voltage circuit is made possible again.
  • FIG. 3 shows a representation of states of a protective switching device.
  • FIG. 3 shows the three states ON, OFF and Control of the protective switching device SG.
  • the protective switching device SG In the ON state, the protective switching device SG is switched on and switched on, i.e. the mechanical isolating contact unit MK is closed and the electronic interruption unit EU is low-resistance. (The protective switching device SG is (normally) supplied with energy.) A current can flow in the electrical low-voltage circuit.
  • the protective switching device SG In the OFF state, the protective switching device SG is enabled and switched off, ie the mechanical isolating contact unit MK is open and the electronic interruption unit EU has a high resistance. In the CONTROL state, the protective switching device SG is switched on and off, ie the mechanical isolating contact unit MK is closed and the electronic interruption unit EU has a high resistance.
  • the type of avoidance of the current flow can be configured.
  • the control unit SE or its microprocessor together with the computer program product e.g. firmware/software
  • either the OFF state or the CONTROL state can occur (indicated by arrows).
  • This behavior is configurable.
  • the OFF state can be achieved with a first configuration CONFI.
  • the CONTROL state can be reached with a second configuration CONF2.
  • the ON state can be reached again from the CONTROL state by means of the switch-on block or the switch-on function AUTO, carried out by the control unit SE or its microprocessor together with a computer program product (e.g. firmware/software), if the corresponding criteria are met (e.g. values / limit values undershot again or time elapsed) .
  • a computer program product e.g. firmware/software
  • the corresponding criteria e.g. values / limit values undershot again or time elapsed
  • an acknowledgment can be made.
  • FIG. 4 shows an illustration according to FIG. 3, in which the classic case of triggering from the ON state to the OFF state when values are exceeded, determined by the threshold value block or the threshold value function SW, is shown.
  • FIG. 5 shows a diagram with the ratio of a current I in the low-voltage circuit to a rated current In of the protective switching device SG on the horizontal X-axis.
  • the vertical Y-axis shows the tripping time t until a current flow in the low-voltage circuit is avoided.
  • the diagram shows a tripping curve in which the associated tripping time t is plotted for a ratio of a current I in the low-voltage circuit to a rated current In, in which the OFF state, marked with disconnection, is reached.
  • the diagram according to FIG. 5 is for the classic case according to FIG. 4, for example.
  • FIG. 6 shows an illustration according to FIG. FIG. 4, with the difference that the behavior from the CONTROL state to the ON state is shown in more detail.
  • the ON state can be reached again if the relevant criteria are met (e .g . values/limit values undershot again or time has elapsed) .
  • This can be done with a release block or a release function FW can be implemented. This can be configured.
  • the ON state can be reached again if an acknowledgment (of the high-impedance state of the switching elements of the electronic interruption unit EU) after exceeding or a parameter has been undershot .
  • This can be configured. This allows current to flow again in the low-voltage circuit.
  • High resistance means a state in which only a negligible current flows.
  • resistance values greater than 1 kilohm, more preferably greater than 10 kilohms, 100 kilohms, 1 megohm, 10 megohms, 100 megohms, 1 gigaohm, or greater.
  • Low-impedance means a state in which the specified current value can flow, i .e . H . a current value for which the protective switching device is intended.
  • low-impedance means resistance values that are less than 10 ohms, better less than 1 ohm, 100 milliohms, 10 milliohms, 1 milliohm, 100 microohms or less.

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  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un disjoncteur pour la protection d'un circuit électrique basse tension, comprenant une unité de contacts de séparation mécanique, qui a un état ouvert des contacts afin d'empêcher un flux de courant dans le circuit basse tension ou un état fermé des contacts pour un flux de courant dans le circuit basse tension, et une unité d'interruption électronique, qui est connectée en série à l'unité de contacts de séparation mécanique sur le côté circuit et qui, en conséquence d'éléments de commutation à base de semi-conducteurs, présente un état ohmique élevé des éléments de commutation afin d'empêcher un flux de courant ou un état ohmique faible des éléments de commutation pour un flux de courant dans le circuit basse tension. Le niveau du courant du circuit basse tension est déterminé, et si au moins un seuil de courant ou un seuil de courant/temps est dépassé, un processus pour empêcher un flux de courant dans le circuit basse tension est démarré. Le type de processus pour empêcher un flux de courant dans le circuit basse tension peut être configuré. Si au moins un paramètre est dépassé, un processus de configuration peut être réalisé par rapport à un état ohmique élevé des éléments de commutation de l'unité d'interruption électronique ou un état ouvert des contacts de l'unité de contacts de séparation mécanique peut être produit.
EP21786801.7A 2021-09-28 2021-09-28 Disjoncteur et procédé Pending EP4377980A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/076629 WO2023051893A1 (fr) 2021-09-28 2021-09-28 Disjoncteur et procédé

Publications (1)

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EP4377980A1 true EP4377980A1 (fr) 2024-06-05

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EP21786801.7A Pending EP4377980A1 (fr) 2021-09-28 2021-09-28 Disjoncteur et procédé

Country Status (4)

Country Link
US (1) US20250046537A1 (fr)
EP (1) EP4377980A1 (fr)
CN (1) CN118020124A (fr)
WO (1) WO2023051893A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021210818A1 (de) * 2021-09-28 2023-03-30 Siemens Aktiengesellschaft Schutzschaltgerät
DE102023207405A1 (de) * 2023-08-02 2025-02-06 Siemens Aktiengesellschaft Schutzschaltgerät und Verfahren
DE102023212020A1 (de) * 2023-11-30 2025-06-05 Siemens Aktiengesellschaft Normenkonformes Schutzschaltgerät und Verfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170004948A1 (en) * 2013-03-13 2017-01-05 Google Inc. Electrical circuit protector
ES2848651T3 (es) * 2016-03-01 2021-08-11 Atom Power Inc Disyuntor híbrido de entrehierro/estado sólido
US11170964B2 (en) * 2019-05-18 2021-11-09 Amber Solutions, Inc. Intelligent circuit breakers with detection circuitry configured to detect fault conditions
US11437211B2 (en) * 2019-09-03 2022-09-06 Atom Power, Inc. Solid-state circuit breaker with self-diagnostic, self-maintenance, and self-protection capabilities

Also Published As

Publication number Publication date
US20250046537A1 (en) 2025-02-06
WO2023051893A1 (fr) 2023-04-06
CN118020124A (zh) 2024-05-10

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