EP4453986A1 - Dispositif de coupure électrique à contact auxiliaire - Google Patents
Dispositif de coupure électrique à contact auxiliaireInfo
- Publication number
- EP4453986A1 EP4453986A1 EP22839876.4A EP22839876A EP4453986A1 EP 4453986 A1 EP4453986 A1 EP 4453986A1 EP 22839876 A EP22839876 A EP 22839876A EP 4453986 A1 EP4453986 A1 EP 4453986A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fixed
- switching device
- 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.)
- Granted
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 cut-off devices for direct current power supply networks, preferably at high voltage (HVDC) and more particularly for aircraft propulsion systems.
- HVDC high voltage
- the electrical cut-off system known by the terms “pyrofuse” or “pyroswitch” is an assembly made up of a pyrotechnic actuator and a fuse triggered by the actuator. It is used to open a power line in which a direct current flows, in the event of a short circuit or excessive current. The pyrotechnic actuator then acts to help the fuse to open the power line in extreme conditions by the combined action of melting the fuse element and a mechanical action of stretching the fuse which contributes to breaking it. There are similarly electrical cut-off systems with mechanical actuator or even others devoid of any actuator.
- the main purpose of the present invention is therefore to ensure constant monitoring of the state of the fuse throughout its lifetime and regardless of its mode of activation. Another purpose is also to ensure that the auxiliary contact detecting this state has indeed reached the end of its travel.
- an electrical cut-off device comprising a fuse used to open a power line in which a direct current flows, 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 movable slide, and an auxiliary contact of which a fixed contact part is integral with the fixed chamber and a contact part moving part secured to the moving drawer, the movement of which 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 the rupture galvanically isolated from the power circuit makes it possible to ensure the function of monitoring the state of the fuse, whatever its mode of activation, short-circuit or pyrotechnic or mechanical activation .
- the mobile drawer is fixed to one end of the fuse by a first fixing screw.
- the movable drawer consists of a slider sliding in the fixed chamber and of a stopper coming to rest against the fixed chamber and fixed to the slider by a second fixing screw.
- the fixed and movable contact parts of the auxiliary contact each consist of a copper strip and a silver pellet.
- the movable contact part is mounted on an insulating plate fixed to the stopper by third fixing screws.
- the auxiliary contact is connected to a Sub-D connector to activate an external signaling process.
- the cut-off device comprises an end-of-travel contact with a copper lamella and a silver pad.
- 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 cut-off device as mentioned above and to an aircraft propulsion system comprising such a high voltage direct current power supply network.
- HVDC high voltage direct current
- Figure 1 is a sectional view in a passive position of a cut-off device according to the invention
- Figure 2 is a sectional view in an active position of a cut-off device according to the invention.
- Figure 3 is an external perspective view of the switching device of Figures 1 and 2 at its auxiliary contact.
- the principle of the invention is based on the fact that as soon as an overcurrent passes through the fuse of the electrical cut-off device and causes it to melt, a drawer provided with an auxiliary contact is no longer retained 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 rupture of the fuse which can thus be monitored.
- Figures 1 and 2 show by way of example, in two different positions, an electrical cut-off device 10 consisting of a pyrotechnic or mechanical actuator 12 and a fuse 14 triggered by the actuator, and used to open a line power in which a high-voltage direct current flows.
- the pyrotechnic or mechanical actuator known per se is not detailed.
- the breaking device In the first position of figure 1, the breaking device is at rest, the fuse 14 of the device is in perfect condition and stretches between a first fixed end 14A and a second mobile end 14B fixed to a mobile drawer 16 by a first fixing screw 18.
- the drawer can move in translation in 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 slider 16A and a stopper 16B.
- the slider 16A is mounted to move in translation in the housing 20 and is in the form of a stepped shaft, the shoulder 160 being permanently located in the housing 20.
- the slider 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 stopper 16B via a second fixing screw 26.
- the stopper 16B fixed to the slider 16A by the second fixing screw 26 stresses 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.
- Each fixed or mobile contact part consists of a copper lamella 320A, 320B and a silver disc 322A, 322B, the bringing into contact of the two silver discs materializing 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 mobile contact parts are connected by wiring to a Sub-D type connector (not shown) which makes it possible to read the state of the auxiliary contact and thus monitor and know the state of the fuse. of the electrical cut-off device.
- this slider 16A secured to one end of the fuse 14 is able to be driven in translation under the relaxation action of this compression spring when the cut-off device 10 passes from its rest position, therefore passive, to a position active in operation, 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 stopper 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 mobile contact part 32B fixed to the stopper 16B is then set in motion and separates from the fixed contact part the fixed chamber 5, the auxiliary contact then being in the open position.
- normally closed auxiliary contactor is, as shown, coupled with a normally open auxiliary contact (NO 38), consisting of another copper strip 380 and a silver pad 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)
Abstract
Description
Claims
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 true EP4453986A1 (fr) | 2024-10-30 |
| EP4453986B1 EP4453986B1 (fr) | 2025-12-10 |
Family
ID=80999306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22839876.4A Active EP4453986B1 (fr) | 2021-12-22 | 2022-12-13 | Dispositif de coupure électrique à contact auxiliaire |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12400819B2 (fr) |
| EP (1) | EP4453986B1 (fr) |
| CN (1) | CN118402031B (fr) |
| FR (1) | FR3131072B1 (fr) |
| WO (1) | WO2023118691A1 (fr) |
Citations (1)
| 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)
| 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 |
-
2021
- 2021-12-22 FR FR2114269A patent/FR3131072B1/fr active Active
-
2022
- 2022-12-13 EP EP22839876.4A patent/EP4453986B1/fr active Active
- 2022-12-13 CN CN202280087083.5A patent/CN118402031B/zh active Active
- 2022-12-13 US US18/723,217 patent/US12400819B2/en active Active
- 2022-12-13 WO PCT/FR2022/052332 patent/WO2023118691A1/fr not_active Ceased
Patent Citations (1)
| 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 |
|---|---|
| EP4453986B1 (fr) | 2025-12-10 |
| WO2023118691A1 (fr) | 2023-06-29 |
| CN118402031A (zh) | 2024-07-26 |
| US12400819B2 (en) | 2025-08-26 |
| US20240420911A1 (en) | 2024-12-19 |
| FR3131072B1 (fr) | 2023-12-15 |
| FR3131072A1 (fr) | 2023-06-23 |
| CN118402031B (zh) | 2025-05-13 |
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