EP3195341B1 - Dispositif de mise en court-circuit, en particulier pour la protection contre les arcs electriques parasites dans des installations basse et moyenne tension - Google Patents

Dispositif de mise en court-circuit, en particulier pour la protection contre les arcs electriques parasites dans des installations basse et moyenne tension Download PDF

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Publication number
EP3195341B1
EP3195341B1 EP15763295.1A EP15763295A EP3195341B1 EP 3195341 B1 EP3195341 B1 EP 3195341B1 EP 15763295 A EP15763295 A EP 15763295A EP 3195341 B1 EP3195341 B1 EP 3195341B1
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EP
European Patent Office
Prior art keywords
housing
short
circuiting device
bolt
electrode
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
EP15763295.1A
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German (de)
English (en)
Other versions
EP3195341A1 (fr
Inventor
Reinhold Kienlein
Markus HÖLLERL
Stefan DIETWEGER
Stefanie Schuster
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.)
Dehn SE and Co KG
Original Assignee
Dehn and Soehne GmbH and Co KG
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Application filed by Dehn and Soehne GmbH and Co KG filed Critical Dehn and Soehne GmbH and Co KG
Publication of EP3195341A1 publication Critical patent/EP3195341A1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/764—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet
    • H01H37/765—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet using a sliding contact between a metallic cylindrical housing and a central electrode

Definitions

  • the invention relates to a short-circuiting device, in particular for the arc fault protection in low and medium voltage installations, consisting of a multi-part housing which receives a fixed and a movable electrode, wherein the electrodes are held by a sacrificial member at a distance from each other in the housing, a mechanical biasing element, which acts on the movable electrode and provides a force vector in the direction of the fixed electrode and which is located within a head portion of the housing, at least one venting and pressure equalization channel and means for activating the sacrificial element such that the electrodes come into electrical contact with each other, according to the preamble of Claim 1.
  • This short-circuiting device comprises a switching element which can be actuated by the trigger signal of an error detection device. Furthermore, there are two opposing contact electrodes with means for supplying current, wherein these can be contacted to a circuit with terminals of different potential. The contact electrodes are under mechanical bias such that in case of short circuit spring assisted relative movement of the electrodes is executed to each other.
  • a sacrificial element acts as a spacer between the contact electrodes. Moreover, there is an electrical connection between the sacrificial element and the switching element on the one hand and one of the contact electrodes on the other hand in order to bring about a thermal flow-induced thermal destruction of the sacrificial element in a targeted manner.
  • this Victim element a thin-walled hollow cylinder with a ratio between diameter and wall thickness of the hollow cylinder> 10: 1, wherein the material of the hollow cylinder is made high-melting.
  • the known short-circuiter is used in personal protection equipment, which are able to trigger a switching element based on an arc fault detection.
  • Such a teaching shows the DE 10 2013 001 612 A1 , where the energy for triggering the switching element is obtained there exclusively from the energy of the occurring arc fault.
  • the biasing spring force can be overcome and the movable of the electrodes are pushed back. This in turn leads to a considerable electrode erosion and the duration of the current carrying capacity is reduced.
  • known short-circuiters do not have the possibility of state detection, so that metrological means are required in order to be able to carry out an evaluation of the relevant component.
  • a short-circuiting device in particular for the arc fault protection in low and medium voltage installations, which consists of a multi-part housing.
  • the housing receives both a fixed and a movable electrode, wherein the electrodes are held by a sacrificial element at a distance from each other in the housing.
  • a mechanical biasing device in particular a biasing element or a biasing spring is present, which acts on the movable electrode and provides a force vector in the direction of the fixed electrode.
  • the mechanical biasing element is located within a head portion of the housing. Furthermore, venting and pressure equalization channels and means for activating the sacrificial element are present such that the electrodes come into electrical contact with each other.
  • the sacrificial element is preferably formed as a fusible element, in particular as a fusible tube and is in communication with an external electrical contact.
  • a locking arrangement is formed in the head of the housing which, after activating the sacrificial element and contacting the electrodes, causes the locking mechanism to retract movable electrode is prevented by directly the movable electrode or indirectly a subsequent movement of the movable electrode slide can be blocked by a spring-biased bolt or similar means.
  • the spring-biased pin is released and prevents the movable electrode from moving back and forth so that its position relative to the fixed electrode is locked and unchangeable.
  • the spring-biased pin is mounted in a complementary recess in the head of the housing, wherein the direction of movement of the bolt is substantially perpendicular to the direction of movement of the movable electrode or a slider connected to the electrode.
  • the aforementioned recess communicates with a viewing window in the housing in order to visualize the position of the bolt and thus the state of the short-circuiting device.
  • the bolt can be colored or have colored sections.
  • a green mark can be seen in the viewing window.
  • the mark changes in the window e.g. to the red.
  • both the bolt end coming into contact with the slider and the slider have a wedge shape on its bolt contact surface.
  • the required self-locking is optimized by the angle of inclination of the wedge surfaces and by the choice of materials of bolt, slider and bolt guide.
  • the sacrificial element may be formed as a melt spacer, starting from a foot portion of the housing one, the Enamel spacer encompassing annular wall or a corresponding annular wall is formed to prevent ingress of molten mass in the electrode gap.
  • the ventilation and pressure equalization channels located in the housing lead to a combustion chamber formed in at least one housing part or a corresponding combustion chamber, wherein the relevant chamber or the chamber has a connection to the ambient atmosphere.
  • the cross-section of the vent and pressure equalization channels increases from the interior of the device to the outside continuously or discontinuously.
  • the Abbrandauffangraum or Abbrandauffanghunt is designed as one or more blind holes.
  • the head portion of the housing is made of a conductive material, e.g. Copper material or a copper alloy, and has an electrical terminal tab, wherein the movable electrode is arranged in the interior of the head part and laterally encompassed and guided by the head part material.
  • a conductive material e.g. Copper material or a copper alloy
  • a stabilizing and force-absorbing ring is clamped in such a way that undesired mechanical forces acting on the sacrificial element can be avoided.
  • the sacrificial element designed as a fusible element or a melting tube is already compressed in a fall from a small drop height to the connecting lugs.
  • the desired dielectric strength is then no longer given.
  • This damage can not be determined externally.
  • mechanical forces can also act directly on the sacrificial element from outside through or after the installation, which is likewise disadvantageous.
  • the short-circuiting device starts from a multi-part housing.
  • a housing head part 1 e.g. consisting of copper
  • a housing foot 2 e.g. formed of an insulating material.
  • a movable electrode 3 Within the head part 1 is a movable electrode 3.
  • a fixed electrode 4 is arranged in the foot part 2.
  • the electrodes 3 and 4 are replaced by a sacrificial element 5, e.g. designed as a melting element, held at a distance from each other in the two-part housing.
  • a sacrificial element 5 e.g. designed as a melting element
  • a mechanical biasing element in particular a spring 6 is present, which acts on the movable electrode 3 and provides a force vector in the direction of the fixed electrode 4.
  • the spring 6 is located within the head part 1 and is supported, as it were, between the head part 1 and the movable electrode 3.
  • ventilation and pressure equalization channels 7 are provided and means for activating the sacrificial element 5 are formed.
  • these means are a power supply 8. If the sacrificial element 5 is activated by a corresponding flow of current, it loses its mechanical hold or its rigidity, so that the movable electrode 3 moves in the direction of the fixed electrode 4 and comes into contact with the latter , so that the desired short circuit between the terminal lugs 9; 10 is created.
  • a locking arrangement is formed, which after activating the sacrificial element 5 and contacting the electrodes 3; 4 prevents retraction of the movable electrode 3.
  • a slider 11 is arranged to follow the movement of the movable electrode.
  • a spring-biased pin 12 can then, when the slider in the direction as in Fig. 2 shown, lowered, penetrate into the remaining space and prevent retraction of the slider 11 and the electrode 3 respectively.
  • the spring-biased pin 12 is mounted in a respective recess in the head part 1 of the housing, wherein the direction of movement of the bolt 12 is oriented substantially perpendicular to the direction of movement of the movable electrode 3.
  • the Fig. 2 shows the tripped state of the short-circuiting device with the clearly visible blocking function by the above-described locking arrangement. It can also be seen that the bolt 12 is subjected to force with the bolt spring 13.
  • the aforementioned recess communicates with a viewing window 14 in order to realize a status display 15. It is thus the position of the bolt 12 on the viewing window 14 from the outside visualized and recognizable.
  • the slider 11 is as in Fig. 1 and 2 seen, received by an insulating sleeve 16 and connected to the movable electrode 3.
  • the sacrificial element 5 is formed as a melt spacer, wherein, starting from the foot part 2 of the housing, a, the melt spacer encompassing wall or an annular wall 20 is formed to prevent penetration of molten material into the electrode gap.
  • the ventilation and pressure equalization channels 7 located in the housing lead to a combustion chamber formed in at least one housing part or a corresponding chamber 21.
  • the combustion chamber or combustion chamber 21 can preferably be embodied as a blind hole.
  • the Abbrandauffangraum or the Abbrandauffanghunt 21 further has a connection 22 to the ambient atmosphere, which can be configured as an annular groove with a corresponding rotationally symmetrical design of the short-circuiting device.
  • venting and pressure equalization channels 7 increase up to the combustion chamber or combustion chamber 21 from the inside to the outside.
  • a stabilizing and force-absorbing ring 23 is located between the head part 1 of the housing and the housing foot part 2.
  • the ring 23 is braced between the head part 1 and the housing foot part 2 in such a way that undesired mechanical force effects on the sacrificial element 5 can be avoided ,
  • a displacement of the movable electrode 3 in the tripped state is blocked unilaterally backlash by the locking mechanism.
  • the travel time of the spring-biased locking bolt 12 is set on the interpretation of the bolt spring 13 and the corresponding masses so that the bolt rests against the shifter 11 due to short-circuit pressure.
  • the bolt 12 is moved according to the embodiment so that a visual change on the viewing window opening 14 can be determined.
  • the status display 15 is moved so far that it is no longer recognizable in the viewing window 14.
  • the integration of the Abbrandauffangschreib or Abbrandauffanghuntn in the housing component allows quick pressure equalization with low Abbrandaustritt. Furthermore, the entire construction volume of the short-circuiting device is reduced.
  • the device according to the invention protrudes fall heights ⁇ 1m. A compression of the sacrificial element is clearly limited even at higher heights.

Claims (10)

  1. Dispositif de mise en court-circuit, en particulier pour la protection contre les arcs électriques parasites dans des installations à basse et moyenne tension, constitué par un boîtier en plusieurs parties, qui loge une électrode fixe (4) et une électrode mobile (3), les électrodes (3 ; 4) étant maintenues à distance l'une de l'autre dans le boîtier par un élément sacrificiel (5), un élément de précontrainte mécanique (6) qui agit sur l'électrode mobile (3) et qui fournit un vecteur de force en direction de l'électrode fixe (4) et qui se trouve à l'intérieur d'une partie de tête (1) du boîtier, au moins un canal d'aération et de compensation de pression (7) ainsi que des moyens (8) pour activer l'élément sacrificiel (5) de telle sorte que les électrodes (3 ; 4) viennent en contact électrique l'une avec l'autre,
    caractérisé en ce que
    dans la partie de tête (1) du boîtier, il est prévu un agencement de verrouillage qui, après l'activation de l'élément sacrificiel (5) et la mise en contact des électrodes (3 ; 4), empêche un déplacement en retour de l'électrode mobile (3), du fait que l'électrode mobile (3) est susceptible d'être bloquée directement ou qu'un tiroir (11) suivant le mouvement de l'électrode mobile (3) est susceptible d'être bloqué indirectement par un boulon (12) précontraint par ressort.
  2. Dispositif de mise en court-circuit selon la revendication 1,
    caractérisé en ce que
    le boulon (12) précontraint par ressort est monté dans un évidement dans la partie de tête (1) du boîtier, la direction de mouvement du boulon (12) étant orientée sensiblement perpendiculairement à la direction de mouvement de l'électrode mobile (3).
  3. Dispositif de mise en court-circuit selon la revendication 2,
    caractérisé en ce que
    l'évidement est en liaison avec une fenêtre d'observation (14) dans le boîtier pour visualiser la position du boulon (12) ou d'un indicateur d'état (15) et ainsi l'état du dispositif de mise en court-circuit.
  4. Dispositif de mise en court-circuit selon l'une des revendications précédentes,
    caractérisé en ce que
    aussi bien l'extrémité de boulon qui vient en contact avec le tiroir (11) que le tiroir (11) possède une forme de coin sur sa surface de contact de boulon.
  5. Dispositif de mise en court-circuit selon l'une des revendications précédentes,
    caractérisé en ce que
    l'élément sacrificiel (5) est réalisé sous forme d'élément écarteur fusible, et à partir d'une partie de pied (2) du boîtier il est prévu une paroi annulaire entourant l'élément écarteur fusible ou il est prévu un rempart annulaire (20) de ce type pour empêcher une pénétration de masse fondue dans l'espace intermédiaire des électrodes.
  6. Dispositif de mise en court-circuit selon l'une des revendications précédentes,
    caractérisé en ce que
    les canaux d'aération et de compensation de pression (7) situés dans le boîtier mènent vers un espace de captage de résidus brûlés réalisé dans au moins une partie de boîtier ou vers une chambre de captage de résidus brûlés (21), l'espace correspondant ou la chambre correspondante (21) ayant une communication (22) vers l'atmosphère environnante.
  7. Dispositif de mise en court-circuit selon la revendication 6,
    caractérisé en ce que
    la surface de section transversale des canaux d'aération et de compensation de pression (7) augmente de l'intérieur vers l'extérieur.
  8. Dispositif de mise en court-circuit selon l'une des revendications précédentes,
    caractérisé en ce que
    la partie de tête (1) du boîtier est constituée en un matériau conducteur et présente une patte de raccordement (10), l'électrode mobile (3) étant agencée à l'intérieur de la partie de tête (1) et étant enserrée et guidée latéralement par le matériau de la partie de tête.
  9. Dispositif de mise en court-circuit selon la revendication 8,
    caractérisé en ce que
    un anneau (23) de stabilisation et d'encaissement de force est serré entre la partie de tête (1) du boîtier et une partie de pied (2) du boîtier, de telle sorte que des actions de forces mécaniques non désirés sur l'élément sacrificiel sont évitables.
  10. Dispositif de mise en court-circuit selon l'une des revendications 6 à 9, caractérisé en ce que
    l'espace de captage de résidus brûlés ou la chambre de captage de résidus brûlés (21) est réalisé(e) sous la forme d'un ou de plusieurs perçages borgnes.
EP15763295.1A 2014-09-19 2015-09-10 Dispositif de mise en court-circuit, en particulier pour la protection contre les arcs electriques parasites dans des installations basse et moyenne tension Active EP3195341B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014013842 2014-09-19
DE102014016274.5A DE102014016274A1 (de) 2014-09-19 2014-11-04 Kurzschließereinrichtung, insbesondere für den Störlichtbogenschutz in Nieder- und Mittelspannungsanlagen
PCT/EP2015/070713 WO2016041839A1 (fr) 2014-09-19 2015-09-10 Dispositif de court-circuit, en particulier pour la protection contre les arcs électriques parasites dans des systèmes à basse et moyenne tension

Publications (2)

Publication Number Publication Date
EP3195341A1 EP3195341A1 (fr) 2017-07-26
EP3195341B1 true EP3195341B1 (fr) 2018-11-07

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Application Number Title Priority Date Filing Date
EP15763295.1A Active EP3195341B1 (fr) 2014-09-19 2015-09-10 Dispositif de mise en court-circuit, en particulier pour la protection contre les arcs electriques parasites dans des installations basse et moyenne tension

Country Status (4)

Country Link
EP (1) EP3195341B1 (fr)
DE (1) DE102014016274A1 (fr)
DK (1) DK3195341T3 (fr)
WO (1) WO2016041839A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016115222B4 (de) * 2016-06-30 2020-02-13 Dehn Se + Co Kg Kurzschließeinrichtung für den Einsatz in Nieder- und Mittelspannungsanlagen zum Sach- und Personenschutz
DE102018100076B3 (de) 2018-01-03 2019-06-13 Dehn + Söhne Gmbh + Co. Kg Kurzschließeinrichtung für den Einsatz in Nieder- und Mittelspannungsanlagen zum Sach- und Personenschutz

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005048003B4 (de) * 2005-08-04 2008-04-30 Dehn + Söhne Gmbh + Co. Kg Kurzschließeinrichtung für den Einsatz in Nieder- und Mittelspannungsanlagen zum Sach- und Personenschutz
DE102011118713A1 (de) * 2011-03-22 2012-09-27 Dehn + Söhne Gmbh + Co. Kg Ein- oder mehrpolige Schalteinrichtung, insbesondere für Gleichstromanwendungen
DE102013001612B4 (de) 2012-02-20 2021-07-01 Dehn Se + Co Kg Anordnung zum Anlagen- und Personenschutz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DK3195341T3 (da) 2019-02-25
EP3195341A1 (fr) 2017-07-26
WO2016041839A1 (fr) 2016-03-24
DE102014016274A1 (de) 2016-03-24

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