EP4453986B1 - Elektrisches schaltgerät mit hilfskontakt - Google Patents

Elektrisches schaltgerät mit hilfskontakt

Info

Publication number
EP4453986B1
EP4453986B1 EP22839876.4A EP22839876A EP4453986B1 EP 4453986 B1 EP4453986 B1 EP 4453986B1 EP 22839876 A EP22839876 A EP 22839876A EP 4453986 B1 EP4453986 B1 EP 4453986B1
Authority
EP
European Patent Office
Prior art keywords
fixed
cut
fuse
auxiliary contact
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22839876.4A
Other languages
English (en)
French (fr)
Other versions
EP4453986A1 (de
Inventor
Ludovic GUYOT
Jérôme Valire
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.)
Safran Electrical and Power SAS
Original Assignee
Safran Electrical and Power SAS
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 Safran Electrical and Power SAS filed Critical Safran Electrical and Power SAS
Publication of EP4453986A1 publication Critical patent/EP4453986A1/de
Application granted granted Critical
Publication of EP4453986B1 publication Critical patent/EP4453986B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/30—Means for indicating condition of fuse structurally associated with the fuse
    • H01H85/303—Movable indicating elements
    • H01H85/306—Movable indicating elements acting on an auxiliary switch or contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/006—Opening by severing a conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/042—General constructions or structure of high voltage fuses, i.e. above 1000 V
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/36—Means for applying mechanical tension to fusible member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member
    • H01H85/10—Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing

Definitions

  • the present invention relates to the general field of electrical switching devices for direct current power supply networks, preferably high voltage (HVDC) and more particularly for aircraft propulsion systems.
  • HVDC high voltage
  • the electrical disconnect system known as a "pyrofuse” or “pyroswitch” is an assembly consisting of a pyrotechnic actuator and a fuse triggered by the actuator. It is used to open a power line carrying direct current in the event of a short circuit or excessive current. The pyrotechnic actuator then acts to assist the fuse in opening the power line under extreme conditions through the combined action of the melting of the fusible element and a mechanical stretching action that helps to break the fuse.
  • the main purpose of this invention is therefore to ensure constant monitoring of the fuse's state throughout its entire lifespan, regardless of its activation mode. Another purpose is to ensure that the auxiliary contact detecting this state has reached its end of travel.
  • an electrical disconnection device comprising a fuse used to open a power line carrying a direct current, characterized in that it further comprises a movable drawer connected to the fuse and capable, once the fuse broken, to move in a fixed chamber under the action of a compression spring mounted between the fixed chamber and the moving drawer, and an auxiliary contact of which a fixed contact part is integral with the fixed chamber and a moving contact part integral with the moving drawer whose movement will cause the opening of the normally closed auxiliary contact.
  • the auxiliary contact is galvanically isolated from the power line.
  • this auxiliary circuit for detecting breakage, galvanically isolated from the power circuit, ensures the monitoring function of the fuse's condition, regardless of its activation mode, whether short circuit, pyrotechnical or mechanical activation.
  • the movable drawer is fixed to one end of the fuse by a first fixing screw.
  • the movable drawer consists of a slide that moves in the fixed chamber and a stop that rests against the fixed chamber and is fixed to the slide by a second fixing screw.
  • the fixed and moving contact parts of the auxiliary contact each consist of a copper strip and a silver pellet.
  • the moving contact part is mounted on an insulating plate fixed to the stop by third fixing screws.
  • the auxiliary contact is connected to a Sub-D connector to actuate an external signaling process.
  • the cutting device comprises a limit switch contact with a copper strip and a silver disc.
  • the fuse is triggered by a pyrotechnic or mechanical actuator.
  • the invention also relates to a high-voltage direct current (HVDC) power supply network comprising a switching device as described above and an aircraft propulsion system comprising such a high-voltage direct current power supply network.
  • HVDC high-voltage direct current
  • the principle of the invention is based on the fact that as soon as an overcurrent passes through the fuse of the electrical cutting device and melts it, a drawer equipped with an auxiliary contact is no longer held by this fuse and then moves in a chamber under the action of a compression spring put under pressure and which thus returns to its free position, releasing the auxiliary contact, so as to signal the breakage of the fuse whose monitoring can thus be ensured.
  • FIGS. 1 And 2 They show, by way of example, in two different positions, an electrical disconnect device 10 consisting of a pyrotechnical or mechanical actuator 12 and a fuse 14 triggered by the actuator, and used to open a power line carrying a high-voltage direct current.
  • the pyrotechnical or mechanical actuator itself is not described in detail.
  • the fuse 14 of the device is in perfect condition and extends between a first fixed end 14A and a second movable end 14B attached to a movable drawer 16 by a first fixing screw 18.
  • the drawer can move in translation within a housing 20 of a fixed chamber 22 mounted in the body 10A of the switching device.
  • the movable drawer is advantageously made in two parts with a slide 16A and a stop 16B.
  • the slide 16A is mounted to move in translation within the housing 20 and is in the form of a shouldered shaft, the shoulder 160 being permanently located in the housing 20.
  • the slide 16A has a first end fixed to the fuse 14 via the first fixing screw 18 and a second end fixed in a blind hole 24 of the stop 16B via a second fixing screw 26.
  • the stop 16B fixed to the slide 16A by the second fixing screw 26, puts under tension a compression spring 28 (which then has a length in place Lp) until it is pressed against the fixed chamber 22 via a connecting ring 30 mounted in the housing 20 and whose thickness corresponds to that of the shoulder 160.
  • An auxiliary contact 32 a fixed contact portion 32A of which is integral with the fixed chamber 22 (more precisely, with a remote portion 22A of this fixed chamber visible at the figure 3 ) and a movable contact part 32B facing it, integral with the movable drawer 16 (more precisely directly from the stop 16B or via an insulating plate 34 fixed by third fixing screws 36 to the stop (visible at the figure 3 (Depending on the material of the stop), is designed to detect the pull-out (melting) of the fuse.
  • the movement of the fuse, via the slide 16A and the compression spring 28, will cause this normally closed (NC) auxiliary contact to open in the rest position of the breaking device.
  • Each fixed or moving contact consists of a copper strip 320A, 320B and a silver disc 322A, 322B. The contact of the two silver discs signifies the closure of the auxiliary contact. Note the galvanic isolation formed between this auxiliary contact and the power line due to the absence of a conductive connection between them.
  • the two copper strips of the two fixed and moving contact parts are connected by wiring to a Sub-D type connector (not shown) which allows the state of the auxiliary contact to be read and thus the state of the fuse of the electrical cut-off device to be monitored and known.
  • this slide 16A attached to one end of the fuse 14, is capable of being moved in translation under the action of the compression spring when the cutting device 10 moves from its rest position, therefore passive, to an active operating position, bringing its shoulder 160 against the connecting ring 30 held by the compression spring 28 against the fixed chamber 22.
  • the bearing face 162 of the stop 16B is now separated from the fixed chamber against which it rested via the connecting ring 30, this separation setting in motion the normally closed auxiliary contact 32.
  • the moving contact part 32B fixed to the stop 16B is then set in motion and disengages from the opposite fixed contact part 32A fixed to the fixed chamber 5, the auxiliary contact then being in the open position.
  • normally closed auxiliary contactor is, as illustrated, coupled with a normally open auxiliary contact (NO 38), consisting of another copper strip 380 and a silver disc 382, it is possible to ensure that the system has reached the end of its travel under the action of the compression spring 28.
  • NO 38 normally open auxiliary contact

Landscapes

  • Fuses (AREA)

Claims (10)

  1. Elektrische Schaltvorrichtung (10), die eine Sicherung (14) beinhaltet, die zum Öffnen einer Leistungsleitung verwendet wird, in welcher ein Gleichstrom fließt, wobei die Vorrichtung ferner einen beweglichen Schieber (16; 16A, 16B) beinhaltet, der mit der Sicherung verbunden ist und sich, sobald die Sicherung durchgegangen ist, in einer festen Kammer (22) unter der Wirkung einer Druckfeder (28), die zwischen der festen Kammer und dem beweglichen Schieber montiert ist, bewegen kann, und einen Hilfskontakt (32), von welchem ein fester Kontaktteil (32A) fest mit der festen Kammer und ein beweglicher Kontaktteil (32B) fest mit dem beweglichen Schieber verbunden ist, dessen Verschiebung die Öffnung des normalerweise geschlossenen Hilfskontakts bewirkt, wobei die Vorrichtung dadurch gekennzeichnet ist, dass der Hilfskontakt galvanisch von der Leistungsleitung isoliert ist.
  2. Schaltvorrichtung nach Anspruch 1, wobei der bewegliche Schieber durch eine erste Befestigungsschraube (18) an einem Ende der Sicherung befestigt ist.
  3. Schaltvorrichtung nach Anspruch 1, wobei der bewegliche Schieber aus einem Gleitstück (16A), das in der festen Kammer gleitet, und einem Anschlag (16B) besteht, der gegen die feste Kammer zur Anlage kommt und an dem Gleitstück durch eine zweite Befestigungsschraube (28) befestigt ist.
  4. Schaltvorrichtung nach einem der Ansprüche 1 bis 3, wobei der Hilfskontakt mit einem Sub-D-Leiter verbunden ist, um einen externen Signalisierungsvorgang zu betätigen.
  5. Schaltvorrichtung nach einem der Ansprüche 1 bis 4, wobei der feste und bewegliche Kontaktteil des Zusatzkontakts jeweils durch eine Kupferlamelle (320A, 320B) und einen Silberpunkt (322A, 322B) gebildet werden.
  6. Schaltvorrichtung nach Anspruch 5, wobei der bewegliche Kontaktteil auf einer isolierenden Platte (34) montiert ist, die an dem Anschlag durch dritte Befestigungsschrauben (36) befestigt ist.
  7. Schaltvorrichtung nach einem der Ansprüche 1 bis 6, die ferner einen Endkontakt (38) aus einer Kumpferlamelle (380) und einem Silberpunkt (382) beinhaltet.
  8. Schaltvorrichtung nach einem der Ansprüche 1 bis 7, wobei die Sicherung durch ein pyrotechnisches oder mechanisches Stellglied (12) ausgelöst wird.
  9. Hochspannungs-Gleichstrom-Versorgungsnetz (HVDC), das eine Schaltvorrichtung nach Anspruch 8 beinhaltet.
  10. Antriebssystem für ein Luftfahrzeug, das ein Hochspannungs-Gleichstrom-Versorgungsnetz nach Anspruch 9 beinhaltet.
EP22839876.4A 2021-12-22 2022-12-13 Elektrisches schaltgerät mit hilfskontakt Active EP4453986B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2114269A FR3131072B1 (fr) 2021-12-22 2021-12-22 Dispositif de coupure électrique à contact auxiliaire
PCT/FR2022/052332 WO2023118691A1 (fr) 2021-12-22 2022-12-13 Dispositif de coupure electrique a contact auxiliaire

Publications (2)

Publication Number Publication Date
EP4453986A1 EP4453986A1 (de) 2024-10-30
EP4453986B1 true EP4453986B1 (de) 2025-12-10

Family

ID=80999306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22839876.4A Active EP4453986B1 (de) 2021-12-22 2022-12-13 Elektrisches schaltgerät mit hilfskontakt

Country Status (5)

Country Link
US (1) US12400819B2 (de)
EP (1) EP4453986B1 (de)
CN (1) CN118402031B (de)
FR (1) FR3131072B1 (de)
WO (1) WO2023118691A1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130200984A1 (en) * 2011-08-12 2013-08-08 Tyco Electronics Corporation Reflowable Circuit Protection Device

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652067A (en) * 1985-12-06 1987-03-24 Switchcraft, Inc. Electrical connector with an internal switch
US5097244A (en) * 1990-12-20 1992-03-17 Cooper Industries, Inc. Bus mounted capacitor expulsion-type fuses
US6650222B2 (en) * 2000-12-07 2003-11-18 Cooper Technologies Company Modular fuseholder
US8941461B2 (en) * 2011-02-02 2015-01-27 Tyco Electronics Corporation Three-function reflowable circuit protection device
US9324533B2 (en) * 2013-03-14 2016-04-26 Mersen Usa Newburyport-Ma, Llc Medium voltage controllable fuse
CN104319124B (zh) * 2014-10-20 2016-08-24 西安爱尔发开关有限公司 真空接触器-熔断器组合电器专用辅助开关
KR101753635B1 (ko) * 2016-05-25 2017-07-19 동양전자 주식회사 감온 펠릿형 온도 퓨즈
DE102016115222B4 (de) * 2016-06-30 2020-02-13 Dehn Se + Co Kg Kurzschließeinrichtung für den Einsatz in Nieder- und Mittelspannungsanlagen zum Sach- und Personenschutz
DE102018131975B4 (de) * 2018-12-12 2021-01-14 Dehn Se + Co Kg Thermisch auslösbare Anzeige- oder Schalteinrichtung sowie Überspannungsableiteranordnung mit einer thermisch auslösbaren Anzeige- oder Schalteinrichtung
CN111337860B (zh) * 2018-12-19 2025-05-16 西安祥泰电器有限公司 一种熔断器检测辅助装置
US10589635B1 (en) * 2019-03-01 2020-03-17 The Boeing Company Active voltage control for hybrid electric aircraft
DE102020104617B4 (de) * 2020-02-21 2023-04-27 Peter Lell Schnelltrennschalter für elektrische Ströme bei hohen Spannungen mit bewegbarem oder verformbarem Trennelement zur Trennung eines Trennbereichs

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130200984A1 (en) * 2011-08-12 2013-08-08 Tyco Electronics Corporation Reflowable Circuit Protection Device

Also Published As

Publication number Publication date
FR3131072B1 (fr) 2023-12-15
CN118402031B (zh) 2025-05-13
WO2023118691A1 (fr) 2023-06-29
US12400819B2 (en) 2025-08-26
US20240420911A1 (en) 2024-12-19
EP4453986A1 (de) 2024-10-30
FR3131072A1 (fr) 2023-06-23
CN118402031A (zh) 2024-07-26

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