EP3437115B1 - Hybridisierungsystem für hochspannungsgleichstrom - Google Patents

Hybridisierungsystem für hochspannungsgleichstrom Download PDF

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Publication number
EP3437115B1
EP3437115B1 EP18728688.5A EP18728688A EP3437115B1 EP 3437115 B1 EP3437115 B1 EP 3437115B1 EP 18728688 A EP18728688 A EP 18728688A EP 3437115 B1 EP3437115 B1 EP 3437115B1
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EP
European Patent Office
Prior art keywords
terminal
terminals
electric
circuit
closed state
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EP18728688.5A
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English (en)
French (fr)
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EP3437115A1 (de
Inventor
Eric GUILLARD
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Leach International Europe SAS
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Leach International Europe SAS
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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
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • 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
    • 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
    • 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
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means
    • H01H2009/543—Contacts shunted by static switch means third parallel branch comprising an energy absorber, e.g. MOV, PTC, Zener
    • 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
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means
    • H01H2009/544—Contacts shunted by static switch means the static switching means being an insulated gate bipolar transistor, e.g. IGBT, Darlington configuration of FET and bipolar transistor
    • 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
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means
    • H01H2009/546—Contacts shunted by static switch means the static switching means being triggered by the voltage over the mechanical switch contacts

Definitions

  • the present invention relates to an electronic hybridization system capable of operating a contactor, a fuse or a circuit breaker in high-voltage direct current.
  • the invention has applications in the field of electrical distribution and more particularly in the field of onboard electrical distribution.
  • Hybrid contactors are contactors using two simultaneous switching technologies, one based on electromechanical switching and the other based on electronic switching using semiconductors. Each of these technologies has advantages and disadvantages.
  • the electromechanical switching allows a low voltage drop across the contactor and a good galvanic isolation.
  • electric arcs are created when the contactor opens and closes, causing erosion of the contacts.
  • the electronic switching is, in turn, arc-free but does not offer the advantages of electromechanical technology in terms of voltage drop and galvanic isolation.
  • hybridization makes it possible to improve the lifetime of the contacts of the electromechanical contactor and possibly the response time of the contactor on opening and closing.
  • the hybridization consists in using one or more power transistors in parallel or in series with the contactor electromechanical.
  • the power transistor is then controlled to assist the electromechanical contactor on opening and closing and to suppress arcing.
  • the energy used for this command comes from an external auxiliary source.
  • Such a hybrid contactor is for example described in the patent application US 2014/0175060 (Reymond et al. ).
  • DC high-voltage fuses use the arcing voltage in order to cut the circuit current in the event of a fault, these fuses have the disadvantage of being cumbersome since the arc voltage is obtained by a distance of fusible material more important that imposes forms of fuses long enough.
  • circuit breaker is formed by high-voltage DC circuit breakers.
  • High-voltage DC circuit breakers are typically realized by means of transistor circuits with current measurement and trip logic when the overload mask is exceeded.
  • hybridization also brings a number of disadvantages.
  • the first is the complexity of switching systems.
  • the second disadvantage is the need to have an auxiliary power source specific to the electronic part. This affects the reliability and increases the maintenance costs since it is necessary to regularly check the load of the auxiliary power supply.
  • the document US2012 / 0007657 describes a hybrid interrupt system whose electronic part is fed by a charging capacity during the formation time of the arc created at the opening of the mechanical switch.
  • the document DE 20 2009 004198 U1 describes a similar hybrid interrupt system.
  • the electronic system described is relatively complex and adapted specifically to the environment of photovoltaic panels.
  • the hybridization system further comprises a power supply for the timed switch, the power supply being connected to the two conductors and being adapted so that the energy comes solely from the electric energy supplied by the electric arc, the power supply comprising a rectifier module connected in input to the two conductors and having an output connected to a ballast, itself connected via a diode to an energy store having two terminals connected to the timer switch.
  • the conductive element of the protection circuit is a fuse.
  • a circuit breaker adapted to operate in high voltage direct current comprises a conductive circuit connected between a first terminal and a second terminal, the conducting circuit being able to go from a closed state to an open state when the current flowing in the conductive circuit exceeds a predetermined overload mask. It further comprises a hybridization system according to one of the above embodiments connected between the first terminal and the second terminal.
  • hybrid contactor we will use as a main example a hybrid contactor. Then we will show the application of the hybridization system to a fuse and a circuit breaker.
  • the standard is for example 270V for avionics avionics systems.
  • the figure 1 illustrates a first embodiment of a hybrid contactor according to a first embodiment of the invention.
  • the hybrid contactor, referenced 1 is connected in series with a DC high voltage power source 2 and a load 3.
  • the hybrid contactor 1 further comprises a hybridization system 5 comprising an electronic switch 12 connected between the terminal A of the electromechanical contactor and the terminal B.
  • the electronic switch 12 is controlled by a control circuit 15 powered by an electronic power supply 11 .
  • This electronic power supply is connected directly to terminals A and B of the electromechanical contactor so as to receive the electric arc voltage and to store this energy.
  • the hybridization system 5 further comprises a first protection circuit 14, dissipative type, to protect the electronic switch 12 against overvoltages at the time of opening of the time switch.
  • This first protection circuit is connected in parallel with the electronic switch 12.
  • This first protection circuit 14 is for example a transient voltage suppression diode.
  • the hybridization system 5 furthermore comprises a second protection circuit 13 connected in series with the electronic switch 12 between the terminal A and the terminal B, making it possible to open the hybrid contactor in the event of failure of the electronic switch 12 when the latter remains locked in the closed state.
  • the protection circuit 13 opens and remains open.
  • the protection circuit 13 is for example a fuse.
  • the control of the electronic switch 12 is illustrated by the time diagram of the figure 2 .
  • the control of the electronic switch is locked with respect to that of the electromechanical contactor 10 also illustrated by a time diagram on the figure 2 .
  • the electromechanical contactor 10 goes from the closed state to the open state at a time referenced t0
  • the electronic switch 12 is controlled to, at the end of a predetermined time d1 after the instant t0, connect electrically terminal A to terminal B for a predetermined duration d2.
  • the electronic switch is in a closed state for the duration d2. It goes back to the open state at the end of the duration d2.
  • This hybrid contactor allows to allow the presence of arcing between the contacts A and B of the electromechanical contactor 10 for a limited time to maintain their contact cleaning function without damaging them.
  • the control of the mobile pallet is carried out by an electromagnet D.
  • the hybridization system 4 has a first connector t connected to the mobile pallet for a potential recovery and a second connector connected to one of the fixed contacts CO1 or CO2 as an illustration of a connection variant having a galvanic isolation without adding additional serial contact.
  • FIGS. 4A to 4D show the presence or absence of an electric arc at the contacts of the electromechanical contactor 10.
  • the electromechanical contactor 10 Before the moment t0 ( Figure 4A ), the electromechanical contactor 10 is in the closed state (conducting state) and the moving contacts CO3 and CO4 are respectively in contact with the fixed contacts C01 and CO2.
  • the electronic switch 12 is in the open state (non-conductive state).
  • the electromechanical contactor 10 is opened (transition from the closed state to the open state). Electrical arcs then appear between, on the one hand, the CO1 contact and the CO3 contact and, on the other hand, between the CO2 contact and the CO4 contact. These arcs are visible on the Figure 4B .
  • the electronic switch 12 goes to the closed state (on state).
  • the moving contact CO4 and the fixed contact C02 are then shunted by the electronic switch 12.
  • the electric arc between the fixed contact CO1 and the moving contact CO3 then goes off as illustrated in FIG. figure 4C .
  • the electronic switch 12 is kept in the closed state (on state) for a duration d2 of between 1 ⁇ s and 10 ms.
  • the CO3 mobile contact is no longer powered by the electric arc between the fixed contact CO1 and the mobile contact CO3.
  • the electronic switch 12 then passes, at the end of the duration d2, in the open state.
  • the electric arc between the movable contact C04 and the fixed contact C04 turns off automatically. This transition to the open state is illustrated by the figure 4D .
  • This control of the electronic switch 12 makes it possible to allow electric arcs in the electromechanical contactor 10 for the duration d1 and then to cut them one after the other, during the duration d2.
  • the autonomous electronic power supply 11 will now be described in more detail with reference to the figure 5 .
  • the autonomous power supply is therefore connected to terminals A and B of the electromechanical contactor 10.
  • This connection is for example provided by flexible conductors having a very small section with respect to the section of the conductors of the main circuit.
  • a rectifier module 111 is directly connected to the connectors of terminals A and B. It is composed of diodes used to rectify the current passing through terminals A and B and thus to overcome the direction of the current between terminals A and B.
  • the output of the rectifier module 111 is connected to a ballast 112 whose purpose is to stabilize the power supply.
  • the output of the ballast 112 is connected to a capacitor 113 which stores the energy.
  • a diode 114 located between the ballast 112 and the capacitor 113 makes it possible to avoid the discharge of the capacitance via the ballast 112.
  • the capacitor 113 is then connected to the sequencing logic 15 to power it, so that it can control the electronic switch 12.
  • control circuit 15 does not require an external power supply device. It is powered by the energy coming from the electric arcs present at the opening of the electromechanical contactor 10.
  • the autonomous power supply 11 is not energized as the electromechanical contactor 10 is in the closed position because the terminals A and B are almost at the same potential.
  • the electromechanical contactor 10 is open and an electric arc is established by the potential difference existing between the terminals A and B. This electric arc energy then serves to charge the capacitor 113 during the first instants of d 1 .
  • the control circuit 15 is then powered and can close the electronic switch 12 at the end of d 1 and for the period d 2 .
  • the hybridization module 5 further comprises a monitoring circuit 40 for transmitting to an external system a calibrated slice of good health.
  • the monitoring circuit 40 is powered by the power supply 11 and detects the electric arc voltage at the terminals A and B thanks to the circuit 41.
  • the circuit 42 detects the arc voltage duration and if this duration is less than or equal to the duration d1 + d2, the circuit 42 allows the circuit 43 to generate a calibrated slot for external supervision.
  • the hybridization system 5 thus gives the contactor high voltage contactor properties.
  • the contact material of the electromechanical contactor is preserved by limiting the duration of the electric arcs, which makes it possible to obtain a high number of opening / closing cycles.
  • the electromagnetic disturbances generated by the electric arcs are advantageously reduced.
  • the size and weight of the hybrid contactor is reduced compared to the state of the art and without the need to use an auxiliary power source.
  • the contactor is advantageously insensitive to the indirect effects of lightning and electromagnetic compatibility.
  • Hybridization system 5 can also be used with a fuse or circuit breaker.
  • figure 7 the hybridization system 5 is connected to the terminals A and B of a low-voltage fuse 20.
  • an electric arc is created after the so-called pre-arc duration.
  • the power supply module stores energy thanks to the back electromotive voltage of the electric arc.
  • the fuse 20 is then short-circuited for the duration d2 so as to suppress the electric arc.
  • the electric arc then turns off automatically because it is no longer crossed by an electric current.
  • the durations d1 and d2 are advantageously determined to adjust the melting time of the fuse.
  • This structure therefore makes it possible to widen the range of use of the fuse for high voltage by adjusting the fusing time of the fuse.
  • FIGS. 8A to 8D show the presence or absence of an electric arc at the low-voltage fuse 20.
  • the fuse blows due to a short circuit or overload in the electrical circuit.
  • the electronic switch 12 goes to the closed state.
  • the fuse is then short-circuited by the electronic switch 12.
  • the electric arc present at the terminals of the fuse then goes off as illustrated in FIG. Figure 8C .
  • the electronic switch 12 is kept in the closed state for a duration d2 of between 1 ⁇ s and 10 ms. Then, at the end of this period d2, the electronic switch goes to the open state, figure 8D .
  • the use of the hybridization system with a low voltage fuse thus gives the fuse high voltage fuse properties while reducing the bulk compared to a conventional high voltage fuse equivalent. It also advantageously reduces the melting time of the fuse.
  • the hybridization system 5 is used with a low voltage electromechanical circuit breaker 30.
  • This assembly advantageously allows to give the circuit breaker high voltage circuit breaker properties while reducing the size of such a high-voltage circuit breaker.
  • the electronic switch 12 may consist of different elements, figure 10 .
  • FIG 10A shows a switch consisting of two MOSFET transistors in series whose intrinsic body diode ensures bidirectionality of the current.
  • the figure 10B shows a switch consisting of two insulated gate bipolar transistors (IGBT) in series with an antiparallel diode to provide bidirectional current.
  • IGBT insulated gate bipolar transistors
  • the Figure 10C shows a switch consisting of a MOSFET transistor with a diode bridge that provides the bidirectionality of the current and the figure 10D shows an insulated gate bipolar transistor (IGBT) with a diode bridge providing bidirectional current.
  • IGBT insulated gate bipolar transistor

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)

Claims (8)

  1. Hybridisierungssystem (5) für eine elektrische Vorrichtung, wobei die elektrische Vorrichtung zwei Anschlüsse (A, B) und zwei Zustände aufweist, einen geschlossenen Zustand, der es einem elektrischen Strom ermöglicht, zwischen den zwei Anschlüssen zu fließen, und einen offenen Zustand, der das Fließen des elektrischen Stroms zwischen den Anschlüssen verhindert, wobei die Vorrichtung dafür geeignet ist, dass beim Übergang vom geschlossenen Zustand in den offenen Zustand ein Lichtbogen erzeugt wird, wobei das Hybridisierungssystem umfasst:
    - zwei Leiter, die dafür geeignet sind, mit den zwei Anschlüssen (A, B) der elektrischen Vorrichtung verbunden zu werden;
    - einen Zeitschalter (12), der zwei Anschlüsse aufweist, die mit den zwei Leitern verbunden sind, und wobei der Zeitschalter dafür geeignet ist, sich standardmäßig im offenen Modus zu befinden und sich nach einer vorbestimmten ersten Dauer d1 nach dem Auslösen des Lichtbogens für eine vorbestimmte zweite Dauer d2 in den geschlossenen Modus zu begeben;
    wobei das Hybridisierungssystem weiter eine elektrische Versorgung (11) des Zeitschalters umfasst, wobei die elektrische Versorgung mit den zwei Leitern verbunden ist und dafür geeignet ist, dass die Energie ausschließlich aus der vom Lichtbogen gelieferten elektrischen Energie stammt,
    dadurch gekennzeichnet, dass die elektrische Versorgung umfasst:
    - ein Gleichrichtermodul, das am Eingang mit den zwei Leitern verbunden ist und einen Ausgang aufweist, der mit einem Vorschaltgerät verbunden ist,
    - das Vorschaltgerät, das über eine Diode mit einem Energiespeicher verbunden ist, wobei der Energiespeicher zwei Anschlüsse aufweist, die mit dem Zeitschalter verbunden sind.
  2. System nach Anspruch 1, dadurch gekennzeichnet, dass der Zeitschalter einen elektronischen Halbleiterschalter umfasst, der mit den zwei Anschlüssen des Zeitschalters verbunden ist, und eine Steuerschaltung des elektronischen Halbleiterschalters, die von der elektrischen Versorgung versorgt wird.
  3. System nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das System weiter eine dissipative Schaltung umfasst, die mit den Anschlüssen des Zeitschalters parallel geschaltet ist.
  4. System nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das System weiter eine Monitoringschaltung (40) umfasst, die von der elektrischen Versorgung (11) versorgt wird und dafür geeignet ist, die Lichtbogenspannung an den Anschlüssen (A, B) und die Lichtbogenspannungsdauer zu erfassen, und dafür, ein Funktionstüchtigkeits- oder Störungssignal zu erzeugen, das für eine externe Überwachung bestimmt ist.
  5. Hybridschütz (1), das mit Hochspannungsgleichstrom funktionieren kann, umfassend:
    - ein elektromechanisches Schützmodul (10), das zwischen einen ersten Anschluss (A) und einen zweiten Anschluss (B) geschaltet ist, wobei das elektromechanische Schützmodul mindestens zwei feste Kontakte und mindestens zwei bewegliche Kontakte umfasst, wobei jeder der zwei beweglichen Kontakte mit einem eigenen festen Kontakt zwischen dem ersten Anschluss und einem Zwischenanschluss (C), welcher vom ersten und zweiten Anschluss getrennt ist, in Kontakt gehen kann, welches elektromechanische Schützmodul (10) sich selektiv in einem geschlossenen Zustand oder einem offenen Zustand befinden kann;
    dadurch gekennzeichnet, dass es weiter ein Hybridisierungssystem nach einem der vorstehenden Ansprüche umfasst, das zwischen den zweiten Anschluss (B) und den Zwischenanschluss (C) geschaltet ist.
  6. Elektrisches Schutzsystem, das mit Hochspannungsgleichstrom funktionieren kann, umfassend ein Leiterelement (20), das zwischen einen ersten Anschluss (A) und einen zweiten Anschluss (B) geschaltet ist, wobei das Leiterelement von einem geschlossenen Zustand in einen offenen Zustand übergehen kann, wenn die Stromstärke, die im Leiterelement fließt, einen vorbestimmten Wert übersteigt,
    dadurch gekennzeichnet, dass es weiter ein Hybridisierungssystem nach einem der Ansprüche 1 bis 4 umfasst, das zwischen den ersten Anschluss (A) und den zweiten Anschluss (B) geschaltet ist.
  7. Elektrisches Schutzsystem nach Anspruch 6, dadurch gekennzeichnet, dass das Leiterelement (20) eine Sicherung ist.
  8. Leitungsschutzschalter, der mit Hochspannungsgleichstrom funktionieren kann, umfassend eine Leiterschaltung (30), die zwischen einen ersten Anschluss (A) und einen zweiten Anschluss (B) geschaltet ist, wobei die Leiterschaltung von einem geschlossenen Zustand in einen offenen Zustand übergehen kann, wenn die Stromstärke, die in der Leiterschaltung fließt, eine vorbestimmte Überlastgröße übersteigt,
    dadurch gekennzeichnet, dass er weiter ein Hybridisierungssystem nach einem der Ansprüche 1 bis 4 umfasst, das zwischen den ersten Anschluss (A) und den zweiten Anschluss (B) geschaltet ist.
EP18728688.5A 2017-05-30 2018-05-03 Hybridisierungsystem für hochspannungsgleichstrom Active EP3437115B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1754754A FR3067165A1 (fr) 2017-05-30 2017-05-30 Systeme d'hybridation pour courant continu haute tension
PCT/FR2018/051114 WO2018220307A1 (fr) 2017-05-30 2018-05-03 Systeme d'hybridation pour courant continu haute tension

Publications (2)

Publication Number Publication Date
EP3437115A1 EP3437115A1 (de) 2019-02-06
EP3437115B1 true EP3437115B1 (de) 2019-09-04

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US (1) US11081297B2 (de)
EP (1) EP3437115B1 (de)
CA (1) CA3060084A1 (de)
ES (1) ES2755358T3 (de)
FR (1) FR3067165A1 (de)
WO (1) WO2018220307A1 (de)

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Publication number Priority date Publication date Assignee Title
FR3126167A1 (fr) 2021-08-10 2023-02-17 Safran Electrical & Power Procédé de contrôle pour contacteur de puissance
FR3143834A1 (fr) * 2022-12-14 2024-06-21 Safran Electrical & Power Installation électrique avec moyens de coupure d’arc électrique série en particulier dans un contacteur
FR3145061A1 (fr) 2023-01-13 2024-07-19 Safran Electrical & Power Contacteur électrique à dispositif de coupure intégré

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DE202009004198U1 (de) 2009-03-25 2010-08-12 Ellenberger & Poensgen Gmbh Trennschalter zur galvanischen Gleichstromunterbrechung
JP5533598B2 (ja) * 2010-11-26 2014-06-25 株式会社リコー 放電エネルギー回収装置及び画像形成装置
US8581516B2 (en) * 2011-12-09 2013-11-12 Hep Tech Co., Ltd. Power processing apparatus and method of releasing the residual power thereof
US20140091060A1 (en) * 2012-09-28 2014-04-03 Arc Suppression Technologies Arc suppression control and methods therefor
FR3000284B1 (fr) * 2012-12-20 2016-05-13 Schneider Electric Ind Sas Dispositif contacteur-disjoncteur
DE102015212802A1 (de) * 2015-07-08 2017-01-12 Ellenberger & Poensgen Gmbh Trennvorrichtung zur Gleichstromunterbrechung
JP6708136B2 (ja) * 2017-01-13 2020-06-10 オムロン株式会社 直流開閉器のアーク消去装置
JP6708137B2 (ja) * 2017-01-13 2020-06-10 オムロン株式会社 直流開閉器のアーク消去装置
US11049685B2 (en) * 2018-05-10 2021-06-29 Eaton Intelligent Power Limited Circuit protector arc flash reduction system with parallel connected semiconducor switch

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Publication number Publication date
BR112019022678A2 (pt) 2020-05-19
EP3437115A1 (de) 2019-02-06
WO2018220307A1 (fr) 2018-12-06
CA3060084A1 (fr) 2018-12-06
FR3067165A1 (fr) 2018-12-07
US11081297B2 (en) 2021-08-03
ES2755358T3 (es) 2020-04-22
US20180350533A1 (en) 2018-12-06

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