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EP3347911A1 - Disjoncteur retardé de courant sous charge avec élément de commutation interne - Google Patents

Disjoncteur retardé de courant sous charge avec élément de commutation interne

Info

Publication number
EP3347911A1
EP3347911A1 EP16822640.5A EP16822640A EP3347911A1 EP 3347911 A1 EP3347911 A1 EP 3347911A1 EP 16822640 A EP16822640 A EP 16822640A EP 3347911 A1 EP3347911 A1 EP 3347911A1
Authority
EP
European Patent Office
Prior art keywords
connection
terminal
fusible conductor
switching element
load
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
Application number
EP16822640.5A
Other languages
German (de)
English (en)
Other versions
EP3347911B1 (fr
Inventor
Rainer Durth
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.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
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 Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP3347911A1 publication Critical patent/EP3347911A1/fr
Application granted granted Critical
Publication of EP3347911B1 publication Critical patent/EP3347911B1/fr
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
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • 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
    • H01H85/048—Fuse resistors
    • 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
    • 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
    • H01H85/44—Structural association with a spark-gap arrester
    • 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
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H01H2085/0283—Structural association with a semiconductor device

Definitions

  • Short circuit currents are so low that normal fuses will not trip.
  • the object is achieved by a load current-carrying fuse with internal switching element.
  • the load-carrying fuse has a protective element, wherein the protective element has a first connection for connection to a first potential of a supply network and a second connection, which can be connected via a device to be protected with a second potential of the supply network.
  • the protective element has a fusible conductor, which connects the first terminal and the second terminal of the protective element, wherein the protective element further comprises a third terminal, which is connectable to the second potential of the supply network and which is adjacent, but electrically isolated to the fusible conductor.
  • the fusible conductor has a constriction in the region of the adjacent connection, wherein the constriction is configured such that the fusible conductor has an electrically conductive flux in the region of the constriction, wherein the flux has a lower softening point than the fusible conductor itself.
  • the fuse element further comprises an internal switching element, which internally the protective element can monitor and selectively effect elimination, wherein the internal switching element is a voltage-sensitive element that is connected with a terminal to the first terminal and that another terminal of the overvoltage-sensitive element adjacent, but electrically isolated to the fusible conductor and adjacent, but electrically isolated to the third Connection is arranged.
  • Fig. 1 is an inventive current-carrying fuse with internal
  • FIG. 2b a further aspect of the invention
  • Fig. 3 shows a still further aspect of the invention
  • FIG. 4 shows an exemplary construction of contacts and fuse elements according to FIG.
  • phase N, L of an alternating voltage network the invention is not limited thereto but can be used in any configuration of an electrical supply network, be it a direct current network, a single-phase or multi-phase alternating voltage network.
  • a load current-carrying fuse 1 with an internal switching element has a protective element F.
  • the protection element F has a first connection FA1 for connection to a first potential L of a supply network and a second connection FA2, which can be connected via a device Z to be protected to a second potential N of the supply network.
  • the device to be protected could also be a power generating device, such as a power plant. be a wind turbine or a solar system.
  • the protective element F has a fuse D, which connects the first terminal FA1 and the second terminal FA2 of the protective element F, wherein the protective element F further comprises a third terminal FA3, which is connectable to the second potential N of the supply network and the adjacent, but is electrically isolated from the fusible conductor D, wherein the fusible conductor D in the region of the adjacent terminal FA3 has a constriction E, wherein the constriction is configured so that the fusible conductor D in the region of the constriction E has an electrically conductive flux SM, wherein the flux SM has a lower softening point than the fuse element D itself.
  • the load-carrying fuse further has an internal switching element that monitors the protection element F internally and can bring about a targeted shutdown, wherein the internal switching element is a voltage-sensitive element TVS, which is connected to a terminal to the first terminal FA1, and another terminal FA4 of the overvoltage-sensitive element TVS adjacent, but electrically isolated to the fusible conductor D and adjacent, but electrically isolated to the third terminal FA3 is arranged.
  • the internal switching element is a voltage-sensitive element TVS, which is connected to a terminal to the first terminal FA1, and another terminal FA4 of the overvoltage-sensitive element TVS adjacent, but electrically isolated to the fusible conductor D and adjacent, but electrically isolated to the third terminal FA3 is arranged.
  • the load-carrying fuse 1 can be designed so that even longer-term overcurrents lead to a safe separation.
  • constriction E is thermally overloaded so that the fusible conductor melts at the constriction E and an arc arises, which in turn commutes to the third supplied port FA3 in the vicinity of the constriction E, so that the device to be protected Z is relieved of electricity, the current deletes and the device to be protected Z has disconnected from the network.
  • the device Z to be protected is relieved of the deletion integral of the protective element F and finally isolated safely isolated from the network.
  • the amount of overloading of the device Z to be protected is in a range in which the device Z to be protected is not destroyed directly, but a change in its electrical properties is to be expected.
  • the fusible conductor D in the region of the bottleneck on an electrically conductive flux SM diffuses when heated in the Schmelzeiter and reduces its conductivity. Since the electrically conductive flux SM is arranged in the region of the bottleneck, due to the fact that there is now a higher electrical resistance, a correspondingly faster heating is to be expected here. This technique allows an improved triggering of the protective element F.
  • the aging process of the bottleneck E can be suitably adjusted. That is, the aging of the constriction E can be used specifically to bring the fuse at low long-lasting overcurrents to trigger.
  • the protection levels can be further reduced without endangering plant availability.
  • the fusible conductor has at least in the region of the bottleneck E - as shown in FIG. 2 a - a perforation (or perforation row) P or - as shown in FIG. 2 b - several perforations P (or perforation rows) P on.
  • a perforation or perforation row
  • P or perforation rows
  • other perforations may also be disposed at other locations on the melter D, e.g. from Figure 2a can be seen.
  • the structure of the perforation P is only exemplary circular. It can also assume other forms.
  • the cage E can have a perforation in which the flux SM is located.
  • the process of diffusing into the melt conductor D can be accelerated.
  • the in-diffusion leads to a change in the electrical resistance (increase), so that the heat conversion increases locally and favors an early separation.
  • Figure 1 shows the voltage-sensitive element as a Transient Voltage Suppressor Diode (TVS).
  • any form of voltage-sensitive element may be used, in particular also other electrical / electronic components such as a thermally non-linearly variable resistor such as a negative temperature coefficient thermistor (NTC) or a PTC (Positive Temperature Coefficient Thermistor), a suppressor diode, or a Gasabieiter or bimetallic switch.
  • NTC negative temperature coefficient thermistor
  • PTC Positive Temperature Coefficient Thermistor
  • suppressor diode or a Gasabieiter or bimetallic switch.
  • Figure 3 shows another aspect of the invention.
  • a time-delaying device is integrated (dead time), which is provided with respect to the internal switching element TVS, for example by low-pass-forming elements, for example a resistor R and a capacitor C.
  • load peaks can be intercepted by switching on motors or charging capacitive loads, ie the currents go back so far within the dead time that the tripping condition is no longer present.
  • the load-carrying fuse 1 is arranged in a pressure-resistant and / or insulating housing.
  • an ignition between the third terminal FA3 and the fusible conductor D is possible with small short-circuit currents, it may happen that the arc then burning is unstable. That it could come to a case in which the arc extinguished without the fusible conductor would be completely interrupted.
  • the fusible conductor is then often only in a partial area, namely the part which is closest to the third terminal FA3 - i. usually at the bottleneck E - melted. More distant areas are preserved, since the arc can not stably burn until there, due to the increasing length.
  • FIG. 4 shows a further aspect according to an embodiment for this purpose.
  • the fuse element D and the third terminal FA3 of the fuse element in the normal operating state are electrically separated by an insulating material ISO, wherein the third terminal and the insulating material ISO are arranged such that an ignition adjacent to the insulating material ISO to an at least superficial degradation of the insulating material ISO, in such a way that the surface loses its insulating property and allows a current flow between the fuse element D and the third terminal FA3.
  • the melting time D (shown with longitudinal hatching) without bottleneck E is shown.
  • the fuse wire D is separated from the third terminal FA 3 (shown by oblique hatching) by an insulating material ISO (shown as a white layer).
  • a fourth connection FA4 (illustrated with cross-hatching) is provided, wherein the third contact and the fourth contact FA4 can in turn be separated by an (identical or different) insulating material ISO.
  • the sequence of the fourth contact FA4 and the third contact FA3 may also be chosen differently, i. also the fourth contact FA4 can be arranged adjacent to the fuse element D.
  • the different contacts FA3, FA4 and the fusible conductor D may be made of thin metal foils or plates, for example.
  • the different elements can be embedded in an insulating border (shown in dotted lines).
  • any ignition i. also lead an ignition of FA4 to the fuse element D to a corresponding (superficial) degradation of the (previously) insulating material ISO.
  • the insulating material ISO a plastic or a composite material with low CTI value, for example, phenolic resin (PF resins), polyetheretherketone (PEEK), polyimide (PI), epoxy resin-filled glass fiber composites such as FR4 or the like.
  • CTI values - also known as tracking resistance - are determined according to IEC 601 12, for example.
  • Exemplary materials are assigned to the insulating group lilac and / or insulating material lllb.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fuses (AREA)

Abstract

L'invention concerne un disjoncteur retardé de courant sous charge ayant un élément de commutation interne comportant un élément de protection (F). Ledit élément de protection (F) comprend un premier branchement (FA1) pour la liaison à un premier potentiel (L) d'un réseau électrique et un deuxième branchement (FA2) qui peut être relié par le biais d'un appareil à protéger (Z) à un second potentiel (N) du réseau électrique. Ledit élément de protection (F) comprend également un conducteur fusible (D) qui relie le premier branchement (FA1) et le deuxième branchement (FA2) de l'élément de protection (F). Ledit élément de protection (F) comprend en outre un troisième branchement (FA3) qui peut être relié au second potentiel (N) du réseau électrique et qui est disposé voisin du conducteur fusible (D), mais électriquement isolé de ce dernier. Le conducteur fusible (D) comprend dans la zone du branchement voisin (FA3) un rétrécissement (E) qui est agencé de sorte que le conducteur fusible (D) comprend dans la zone du rétrécissement (E) un moyen fusible électroconducteur (SM), le moyen fusible (SM) comprenant lui-même un point de ramollissement inférieur à celui du conducteur fusible (D). Le disjoncteur retardé de courant sous charge comprend en outre un élément de commutation interne qui surveille en interne l'élément de protection (F) et peut provoquer une coupure ciblée, l'élément de commutation interne comprenant un élément sensible à la tension (TVS) qui est relié par un branchement au premier branchement (FA1) tandis que l'autre branchement de l'élément sensible à une surtension (TVS) est disposé voisin du conducteur fusible (D) mais électriquement isolé de ce dernier et voisin du troisième branchement (FA3) mais électriquement isolé de celui-ci.
EP16822640.5A 2015-12-16 2016-12-16 Disjoncteur retardé de courant sous charge avec élément de commutation interne Active EP3347911B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015225377.5A DE102015225377A1 (de) 2015-12-16 2015-12-16 Laststromtragende Sicherung mit internem Schaltelement
PCT/EP2016/081330 WO2017103036A1 (fr) 2015-12-16 2016-12-16 Disjoncteur retardé de courant sous charge avec élément de commutation interne

Publications (2)

Publication Number Publication Date
EP3347911A1 true EP3347911A1 (fr) 2018-07-18
EP3347911B1 EP3347911B1 (fr) 2018-12-12

Family

ID=57749905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16822640.5A Active EP3347911B1 (fr) 2015-12-16 2016-12-16 Disjoncteur retardé de courant sous charge avec élément de commutation interne

Country Status (5)

Country Link
US (1) US9831057B2 (fr)
EP (1) EP3347911B1 (fr)
CN (1) CN108604518B (fr)
DE (1) DE102015225377A1 (fr)
WO (1) WO2017103036A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12040109B2 (en) * 2019-11-21 2024-07-16 Littelfuse, Inc. Circuit protection device with PTC device and backup fuse

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737725A (en) * 1971-11-08 1973-06-05 Aviat Corp Circuit overvoltage protector
JP3562685B2 (ja) * 1996-12-12 2004-09-08 矢崎総業株式会社 ヒューズ及びその製造方法
JP2000306477A (ja) * 1999-04-16 2000-11-02 Sony Chem Corp 保護素子
JP2001325869A (ja) * 2000-05-17 2001-11-22 Sony Chem Corp 保護素子
US6671126B2 (en) * 2000-07-21 2003-12-30 Phoenix Contact Gmbh & Co. Overvoltage protection device
DE102009048045B4 (de) * 2009-10-02 2011-06-01 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement
DE102011001509B4 (de) * 2011-03-23 2016-04-07 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzgerät
DE102011001734B4 (de) * 2011-04-01 2016-02-18 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzeinrichtung
DE102011053415A1 (de) * 2011-09-08 2013-03-14 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzgerät
WO2014065763A2 (fr) * 2012-10-25 2014-05-01 Razvojni Center Enem Novi Materiali D.O.O. Fusible doté d'au moins un élément de fusion
DE102013019391B4 (de) * 2013-04-11 2022-04-28 Dehn Se Anordnung zum Überlastschutz von Überspannungsschutzgeräten
DE102014215280B3 (de) * 2014-08-04 2015-09-24 Phoenix Contact Gmbh & Co. Kg Kombiniertes Überspannungsschutzgerät mit einer integrierten Funkenstrecke
DE102014215282B3 (de) * 2014-08-04 2015-10-01 Phoenix Contact Gmbh & Co. Kg Kombiniertes Überspannungsschutzgerät mit einer integrierten Funkenstrecke
CN104638629B (zh) * 2015-02-13 2019-03-05 菲尼克斯亚太电气（南京）有限公司 分压触发的对称式过电压防雷电路

Also Published As

Publication number Publication date
CN108604518B (zh) 2020-04-14
WO2017103036A1 (fr) 2017-06-22
CN108604518A (zh) 2018-09-28
DE102015225377A1 (de) 2017-06-22
US9831057B2 (en) 2017-11-28
EP3347911B1 (fr) 2018-12-12
US20170178856A1 (en) 2017-06-22

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