EP4367702A1 - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- EP4367702A1 EP4367702A1 EP22783456.1A EP22783456A EP4367702A1 EP 4367702 A1 EP4367702 A1 EP 4367702A1 EP 22783456 A EP22783456 A EP 22783456A EP 4367702 A1 EP4367702 A1 EP 4367702A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- contact
- switching device
- protective switching
- current
- 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
Links
- 230000001681 protective effect Effects 0.000 claims description 74
- 239000004065 semiconductor Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 description 39
- 230000007935 neutral effect Effects 0.000 description 16
- 230000008901 benefit Effects 0.000 description 13
- 238000004891 communication Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 4
- HWWIYXKSCZCMFV-ZETCQYMHSA-N 2-[[(2s)-1-acetylpyrrolidine-2-carbonyl]-nitrosoamino]acetic acid Chemical compound CC(=O)N1CCC[C@H]1C(=O)N(CC(O)=O)N=O HWWIYXKSCZCMFV-ZETCQYMHSA-N 0.000 description 3
- 101150075622 UL80 gene Proteins 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009993 protective function Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
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
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
-
- 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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
-
- 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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
-
- 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
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
-
- 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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
- H01H71/64—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement incorporating toggle linkage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
Definitions
- the invention relates to the technical field of a protective switching device for a low-voltage circuit with a mechanical isolating contact unit and an electronic interrupter unit.
- low voltage voltages of up to 1000 volts AC or up to 1500 volts DC.
- Low voltage refers in particular to voltages that are greater than extra-low voltage, with values of 50 volts AC or 120 volts DC, are .
- the stated AC voltage values mean effective values.
- 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 are meant.
- 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.
- the rated currents can be scaled further, from 0.5 A to 1 A, 2 A, 3 A, 4 A, 5 A, 6 A, 7 A, 8 A, 9 A, 10 A, etc . up to 16 A.
- 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 Switch off short circuit automatically.
- 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 construction. 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 in the event of 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 flow of electrical current in the low-voltage circuit is routed via semiconductor components or semiconductor switches, which interrupt or switch off the flow of electrical current. 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 in accordance with relevant standards for low-voltage circuits, the contacts of the mechanical isolating contact system are connected in series with the electronic interrupter unit, 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 object of the present invention is to improve a protective switching device of the type mentioned at the outset, in particular to increase the safety of 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 is connected in series with an electronic interrupting unit, the mechanical isolating contact unit having a handle for opening at least one contact to prevent a current flow or closing the at least one contact for a current flow in the low-voltage circuit,
- the protective switching device being designed in such a way that when current or current-time limit values are exceeded, the current flow in the low-voltage circuit is interrupted by the mechanical isolating contact unit and/or the electronic interrupting unit.
- the protective switching device is designed in such a way that the at least one contact of the mechanical isolating contact unit can only be closed by the handle when there is a release signal for closing the at least one contact.
- the at least one contact can only be closed by manual actuation when a release signal, in particular from the control unit, present .
- the release signal is only emitted when the protective switching device, in particular the control unit or the electronic interrupting unit is active and functional .
- D. H a current flow in the low-voltage circuit by closing the contact is only possible when the protective switching device can (actively) carry out its protective functions.
- the mechanical isolating contact unit is connected to a load-side connection and the electronic interruption unit is connected to a line-side connection of the protective switching device.
- the mechanical isolating contact unit is designed in such a way that the at least one contact can be opened by the control unit but cannot be closed.
- the mechanical isolating contact unit is designed in such a way that position information about the closed or open state of the at least one contact is available.
- the position information can be acquired by the control unit.
- a position sensor can be provided for this purpose.
- the position sensor can be connected to the control unit.
- control unit can provide feedback on the switching position of the contacts or the handle receives, so if necessary. to make another decision for a release signal.
- a current sensor unit is provided for determining the magnitude of the current in the low-voltage circuit.
- the current sensor unit is connected to the control unit.
- the current sensor unit is provided in a phase conductor of the low-voltage circuit.
- the release signal for enabling the closing of the at least one contact is emitted by the control unit.
- the release signal is then issued when the protective switching device is in a functional state. This is particularly the case when the control unit is in an active and functional state and the control unit contains the units or systems relevant to the protective function. Components (device parts), such as electronic interrupting unit, current and voltage sensor units are in a functional state.
- the at least one contact is opened by the control unit when an error condition is determined by the control unit.
- the protective switching device in particular the mechanical isolating contact unit, has an actuator.
- the actuator prevents the at least one contact from being closed by the handle, particularly in the de-energized state (or idle state).
- the actuator allows H . in the particular energized state that the at least one contact can be closed by the handle.
- the protective switching device in particular the mechanical isolating contact unit, is designed in such a way that the handle can be moved if there is no enable signal. However, the at least one contact cannot be closed in this case.
- the electronic interruption unit can be switched by semiconductor-based switching elements to a high-impedance state of the switching elements to avoid current flow or a low-impedance state of the switching elements to current flow in the low-voltage circuit.
- the low-voltage circuit is a three-phase alternating current circuit.
- the protective switching device has further connections between which a series connection of a further contact of the mechanical isolating contact unit and an electronic interrupting unit is connected in each case. This has the particular advantage that a solution is provided for three-phase AC circuits.
- control unit has a microcontroller.
- Figure 1 is a first schematic representation of a protective switching device
- FIG. 2 shows a first representation of a mechanical isolating contact unit
- FIG. 3 shows a second illustration of a mechanical isolating contact unit
- FIG. 4 shows a third representation of a mechanical isolating contact unit
- FIG. 5 shows a fourth illustration of a mechanical isolating contact unit.
- FIG. 1 shows a representation of a protective switching device SG for protecting an electrical low-voltage circuit, in particular a low-voltage alternating current circuit, with a housing GEH, comprising:
- Mains connections that i . B. include a line-side neutral conductor connection NG and a line-side phase conductor connection LG,
- - load side connections i . B. include a load-side neutral conductor connection NL and a load-side phase conductor connection LL,
- an energy source is usually connected to the grid-side connections / the grid-side GRID
- a consumer is usually connected to the load-side connections / the load side LOAD;
- the load-side connection points APNL, APLL are connected to the load-side neutral and phase conductor connections NL, LL, so that opening of contacts KKN, KKL to avoid current flow or closing of the contacts for current flow in the low-voltage circuit can be switched,
- electronic interruption unit EU (which is arranged in particular in the phase conductor in the case of a single-pole design) with a grid-side connection point EUG, which is electrically connected to the grid-side phase conductor connection LG, and a load-side connection point EUL, which is connected to the grid-side Connection point APLG of the mechanical isolating contact unit MK is electrically connected or. is connected, wherein the electronic interruption unit EU by indicated semiconductor-based switching elements has a high-impedance state of the switching elements to avoid a current flow or a low-impedance state of the switching elements to current flow in the low-voltage circuit or. is switchable,
- a current sensor unit S I for determining the level of the current of the low-voltage circuit, which is particularly in the current path of the phase conductor or. phase conductor current path is arranged,
- control unit SE connected to the current sensor unit SI, the mechanical isolating contact unit MK and the electronic interrupting unit EU is connected, with exceeding current or current time limit values interrupting the current flow in the low-voltage circuit through the mechanical isolating contact unit MK and / or the electronic interrupting unit EU is initiated.
- the mechanical isolating contact unit MK is connected in series with the electronic interruption unit EU.
- the mechanical isolating contact unit MK has a handle HH for opening at least one contact, in the example two contacts: a (first) phase conductor contact KKL (for the phase conductor) and a neutral conductor contact KKN (for the neutral conductor), to avoid current flow or to close the at least a contact for a current flow in the low-voltage circuit.
- the handle HH is accessible on the device and can be used by a user or technicians are operated.
- the mechanical isolating contact unit MK can be arranged on the load side, as shown.
- the electronic interruption unit EU can be arranged on the network side.
- the grid side GRID with the energy source is normally under electrical voltage.
- An electrical consumer is usually connected to the load side LOAD.
- the mechanical isolating contact unit MK can be operated by the mechanical handle HH on the protective switching device SG in order to switch a manual (manual) opening or closing of the contacts KKL, KKN.
- the mechanical handle HH indicates the switching status (open or closed) of the contacts of the mechanical isolating contact unit MK on the protective switching device.
- the contact position (or the position of the handle, closed or open) can be transmitted to the control unit SE.
- the contact position (or the position of the handle) can z. B. by means of a (position) sensor POS or Position sensor unit POS are determined.
- the contact position or the switching state can be used Control unit SE are transmitted. This is indicated by an arrow from the position sensor unit POS to the control unit SE.
- the mechanical isolating contact unit MK is advantageously designed according to the invention in such a way that a (manual) closing of the contacts by the mechanical handle HH is only possible after a release (enable), in particular a release signal.
- the transmission of the release or the release signal is indicated by an arrow from the control unit SE to the mechanical isolating contacts unit MK, in particular to a release unit FG.
- the at least one contact (e.g. the contacts KKL, KKN) of the mechanical isolating contact unit MK can only be closed by the handle HH when the release or the release signal (from the control unit) is present. Without the release or the release signal Enable, the handle HH can be actuated, but the contacts cannot be closed ("permanent slipping").
- the release unit/release function FG enables the actuation of the contacts of the mechanical isolating contact unit by the handle HH when an enable signal Enable is present. This means that the contacts KKL, KKN can only be closed by the handle if the enable signal (from the control unit SE) is present. Otherwise, closing is not possible (permanent slipping of the handle HH). The contacts remain in the open position/switching state.
- the release unit FG can cause the contacts to open (second function of the release unit FG) when an opening signal OEF (from the control unit SE) is present.
- the release unit/release function FG then acts as a trip unit for opening the contacts of the mechanical isolating contact unit MK.
- the protective switching device recognizes the error and switches the device to a safe state. Likewise, an error condition on the load side or grid side can be detected and result in the device being switched to a safe state. a ) The error in the electronics is detected . b ) The device switches off the power semiconductor (high impedance). c ) The device opens the mechanical isolating contact . A possible switch lock of the mechanical isolating contact unit MK is then in an off state and switching on via the mechanical actuation/handle is no longer possible since there is no enable signal. d) The error is reported via the communication unit COM.
- the protective switching device can also check whether it is functional as soon as it is supplied with electrical energy. For example, through a self-test. If the test is positive, i. H . were no errors in the device or the connected network / energy source on the network side grid or of the connected consumer on the load side Load determined, d. H . if the device is in an active and functional state and/or environment, only then is a release signal Enable sent to the release unit FG or mechanical isolating contact unit MK delivered.
- the protective switching device SG can advantageously be designed in such a way that the contacts of the mechanical isolating contact unit MK can be opened by the control unit SE, but cannot be closed.
- the opening process is also indicated by the arrow from the control unit SE to the mechanical isolating contact unit MK, with the process OEF. This further increases security.
- the protective switching device can be designed in such a way that the magnitude of the voltage across the electronic interruption unit can advantageously be determined.
- D. H the level of a first voltage between the grid-side connection point EUG and load-side connection point EUL of the electronic interruption unit EU can be determined or is determined .
- a first voltage sensor unit SUI connected to the control unit SE is provided in the example according to FIG.
- the voltage across the series connection of electronic interruption unit EU and current sensor S I can alternatively also be determined, as shown in FIG.
- the current sensor unit S I has a very low internal resistance, so that the determination of the level of the voltage is not affected or is only negligibly affected.
- a second voltage sensor unit SU2 can be provided, which determines the magnitude of the voltage between the line-side neutral conductor connection NG and the line-side phase conductor connection LG.
- the electronic interruption unit EU has a single-pole design, in the example in the phase conductor.
- the line-side connection point APNG for the neutral conductor of the mechanical isolating contact unit MK is connected to the line-side neutral conductor connection NG of the housing GEH.
- the protective switching device SG has a power supply or NT power supply, for example a switched-mode power supply.
- the power supply/power pack NT is provided for the control unit SE, which is indicated by a connection between the power supply/power pack NT and the control unit SE in FIG.
- the energy supply/power pack NT is (on the other hand) connected to the line-side neutral conductor connection NG and the line-side phase conductor connection LG.
- a fuse SS in particular a fuse, or a switch SCH can be provided.
- the power pack NT is normally constantly supplied with energy. It may be secured by the fuse SS or. can be switched off by the switch SCH.
- the low-voltage circuit can be a three-phase AC circuit, with a neutral conductor and three phase conductors.
- the protective switching device can be designed as a three-phase variant and can have, for example, further line-side and load-side phase conductor connections.
- inventive electronic interruption units and contacts of the mechanical isolating contact unit are provided between the other line-side and load-side phase conductor connections, as are current sensor units.
- voltage determinations e.g. by first voltage sensor units
- first voltage sensor units can be provided.
- the protective switching device SG can have a temperature sensor TEM for determining the level of the temperature of the protective switching device or in particular for determining the height of the temperature of the electronic interruption unit EU, as indicated in FIG.
- the temperature sensor TEM is connected to the control unit SE. If a temperature limit is exceeded, an opening signal OEF can be issued or a release signal is not given / prevented.
- the protective switching device SG can have a display unit AE for displaying information, switching states, etc. of the protective switching device.
- the display unit AE is connected to the control unit SE or. can be part of the control unit SE.
- the protective switching device SG can have a communication unit COM.
- the communication unit COM is connected to the control unit SE or. can be part of be control unit SE.
- the communication unit COM can be a wired communication unit or preferably a wireless communication unit, for example a radio-based communication unit.
- High resistance means a state in which only a negligible current flows.
- a current of negligible magnitude means, in particular, a current of less than 2 mA, more specifically less than 0.5 mA.
- Low-impedance means a condition in which the current value specified on the protective switching device could flow.
- low-impedance means resistance values that are less than 10 ohms, better less than 1 ohm, 100 milliohms, 10 milliohms, 1 milliohm or less.
- the protective switching device can be constructed in two parts.
- an electronic first part for example on a printed circuit board.
- the first part can have the control unit SE, the first voltage sensor unit SUI, the second voltage sensor unit SU2, the current sensor unit SI, the electronic interruption unit EU, the power supply NT.
- the first part can have the fuse SS, the switch SCH, the temperature sensor TEM (in particular for the electronic interruption unit EU), the communication unit COM, the display unit AE.
- the first part can only have three connections:
- the protective switching device can then also contain a second part, in particular a mechanical part.
- the second part can have the mechanical isolating contact unit MK, the handle HH, the release unit FG.
- the second part can have the position unit POS, for reporting the position of the contacts of the mechanical isolating contacts unit MK to the control unit, as well as the (neutral conductor) connection(s). Further units, not specified in detail, can be provided.
- a compact protective switching device according to the invention can advantageously be implemented as a result of the division into two.
- FIG. 1 shows the overview of the components in the (electronic) protective switching device.
- the protective switching device has a mechanical isolating contact unit MK and an electronic interruption unit EU (electronic switch).
- a control unit SE is also included.
- the control unit SE records measured values of the sensor unit.
- the control unit SE controls the electronic interruption unit.
- the control unit SE controls the release unit FG of the mechanical isolating contact unit.
- the contacts of the mechanical isolating contact unit can only be closed by the handle/manual operation.
- Switching mechanism SL of the mechanical isolating contact unit MK is designed in such a way that the closing of the contacts KKL, KKN by manual operation with the handle HH/ on the existing switching lever is not possible as long as the control unit SE does not explicitly enable it (enable signal). This ensures that the contacts can only be closed (by manual operation) when the SE control unit is active and has checked its functionality.
- control unit SE can send an opening signal OEF to the mechanical isolating contact unit MK in order to open the contacts in the closed state, for example also by means of the release unit FG.
- the contacts or Mechanical isolating contacts can thus be brought from the closed state into the open state by the control unit SE.
- Figure 2 shows, at least in part or. indicated , the structure or Components of a mechanical isolating contact unit MK, in particular with a switch lock SL, the handle HH and the contact KKL (when arranged in the phase conductor) or KKN (when arranged in the neutral conductor).
- the contact has i . B. a pair of contact pieces consisting of a fixed contact piece FST and a moving contact piece or Contact piece BST (moving contact piece).
- An actuator "Actuator” according to the invention is provided, for example a relay coil with a plunger, which engages in the mechanical isolating contact unit MK or is provided in the mechanical isolating contact unit MK, as shown in Figure 2, for example.
- the actuator "Actuator” prevents the e.g. B. advantageously de-energized state closing of the at least one contact is prevented by the handle.
- D. H . is arranged accordingly grips accordingly in the mechanical isolating contact unit MK or . switch lock SL on .
- the actuator "Actuator” also causes the actuator to be energized when the release signal is present, so that the at least one contact can be closed by the handle. Ie. the actuator “Actuator” is arranged accordingly or engages accordingly in the mechanical isolating contact unit MK or the switching mechanism SL.
- FIG. 2 shows the switched-off state of the mechanical isolating contact unit MK with the contacts KKL (or KKN) open.
- the actuator "actuator” works together with a lever LC (lock control lever).
- the lever LC or lock control lever is in a "disabled” position LCOFF, so that it is not possible to switch on the mechanical contact.
- An actuation of the handle HH would lead to a slip and the contacts or. the moving contact of the at least one pair of contacts remains in the shown (switched off/high-impedance) open position.
- the release function is realized by the lever LC (in the switched-off position: LCOFF) and the actuator "Actuator”.
- FIG. 3 shows an illustration according to FIG. 2, in which the contact KKL (or KKN) (also) is in the switched off/opened position, with the difference that the lever LC or Lock control lever is in an "enable” position LCON, which enables the contacts to be closed or switched on by the handle HH.
- the lever LC or lock control lever was moved to a different position via the actuator "Actuator”. So it can come to a latching with the switching mechanism when you press the handle to close the contacts (switching on), so that the movable contact piece or.
- Contact piece BST moving contact piece
- FIG. 4 shows an illustration according to FIG. 3, with the difference that the handle HH was actuated.
- the contact could be closed.
- the latching of the elements is shown .
- the contacts are in the closed position.
- FIG. 5 shows an illustration according to FIG. 2, with the difference that the handle HH was actuated. Since the actuator was not energized (no release or no release signal Enable), the handle cannot grip the switching mechanism and consequently cannot close the contact. The handle can be moved, but the contact cannot be closed. After actuation, the handle returns to its original state (slips or permanent slips).
- a novel electronic protective switching device with mechanical isolating contacts in combination with an electronic switch is proposed.
- the protective switching device particularly in the control unit SE or electronic interruption unit EU, the manual mechanical switching on of the isolating contacts is prevented. Safe operation of the protective switching device is thus always ensured.
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021210819.9A DE102021210819A1 (en) | 2021-09-28 | 2021-09-28 | protective switching device |
PCT/EP2022/075255 WO2023052110A1 (en) | 2021-09-28 | 2022-09-12 | Circuit breaker |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4367702A1 true EP4367702A1 (en) | 2024-05-15 |
Family
ID=83558251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22783456.1A Pending EP4367702A1 (en) | 2021-09-28 | 2022-09-12 | Circuit breaker |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4367702A1 (en) |
CN (1) | CN118020126A (en) |
DE (1) | DE102021210819A1 (en) |
WO (1) | WO2023052110A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2651915B1 (en) * | 1989-09-13 | 1991-11-08 | Merlin Gerin | ULTRA-FAST STATIC CIRCUIT BREAKER WITH GALVANIC ISOLATION. |
US11551899B2 (en) * | 2019-05-18 | 2023-01-10 | Amber Semiconductor, Inc. | Intelligent circuit breakers with solid-state bidirectional switches |
WO2021046097A1 (en) | 2019-09-03 | 2021-03-11 | Atom Power, Inc. | Solid-state circuit breaker with self-diagnostic, self-maintenance, and self-protection capabilities |
DE102019213604A1 (en) * | 2019-09-06 | 2021-03-11 | Siemens Aktiengesellschaft | Circuit breaker, circuit breaker system and process |
EP3945535B1 (en) | 2020-07-28 | 2023-04-12 | ABB S.p.A. | A hybrid switching apparatus of the withdrawable type |
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2021
- 2021-09-28 DE DE102021210819.9A patent/DE102021210819A1/en active Pending
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2022
- 2022-09-12 WO PCT/EP2022/075255 patent/WO2023052110A1/en active Application Filing
- 2022-09-12 CN CN202280065263.3A patent/CN118020126A/en active Pending
- 2022-09-12 EP EP22783456.1A patent/EP4367702A1/en active Pending
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Publication number | Publication date |
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WO2023052110A1 (en) | 2023-04-06 |
DE102021210819A1 (en) | 2023-03-30 |
CN118020126A (en) | 2024-05-10 |
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