EP2983191B1 - Système de détection d'arcs électriques parasites dans un réseau basse tension - Google Patents

Système de détection d'arcs électriques parasites dans un réseau basse tension Download PDF

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Publication number
EP2983191B1
EP2983191B1 EP15161625.7A EP15161625A EP2983191B1 EP 2983191 B1 EP2983191 B1 EP 2983191B1 EP 15161625 A EP15161625 A EP 15161625A EP 2983191 B1 EP2983191 B1 EP 2983191B1
Authority
EP
European Patent Office
Prior art keywords
connection
connecting element
protective
fire
housing
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
EP15161625.7A
Other languages
German (de)
English (en)
Other versions
EP2983191A1 (fr
Inventor
Teresa Miethaner
Sebastian Schaich
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP2983191A1 publication Critical patent/EP2983191A1/fr
Application granted granted Critical
Publication of EP2983191B1 publication Critical patent/EP2983191B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting
    • H01R9/2675—Electrical interconnections between two blocks, e.g. by means of busbars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections
    • H01H2071/086—Low power connections for auxiliary switches, e.g. shunt trip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/201—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other abnormal electrical condition being an arc fault

Definitions

  • the invention relates to an arrangement for detecting arcing faults in a low-voltage network.
  • fire protection switch In electrical installation technology, the term "fire protection switch” is understood to mean a protective device for protection against faulty or arcing faults. Such arc fault protection devices are used in low-voltage networks to protect the electrical installation technology from damage caused by arc fault and their thermal consequences - such as cable fires.
  • An arc fault for example, at a defective point of an electrical line, such as a loose cable clamp, or due to a cable break occur. If the arc occurs electrically in series with an electrical load, the normal operating current is usually not exceeded because it is limited by the consumer. For this reason, the arc is not detected by a conventional overcurrent protection device, such as a fuse or a circuit breaker. This is particularly problematic at high operating currents as well as existing for a long time arcs, since in these cases, there is a risk of fire due to the high temperatures.
  • both the voltage curve and the current profile over time are measured by the fire protection switch and evaluated by means of digital signal processing.
  • the current profile has at Störlichtbögen characteristic, high-frequency components.
  • regular fluctuations in the current waveform as well as in normal operation occurring harmonics or transient current waveforms Do not cause a faulty tripping of the fire protection switch when switching on consumers. For this reason, fire circuit breakers have relatively complex algorithms for monitoring the electrical installation as well as for detecting possible arcing faults.
  • AFDD Arc Fault Detection Device
  • UL standard Underwriters laboratories, standard with 110 V mains voltage
  • AFCI Arc Fault Circuit Interrupter
  • arc circuit breakers are even compulsory to detect, based on predetermined criteria, whether there may be an electric arc in a circuit.
  • the arc protection switches used there have their own isolating contact, which is opened in the event of the presence of an arc.
  • the principles used in these arc circuit breakers are disclosed, for example, in US patents US 5,729,145 such as US 6,031,699 described.
  • fire protection switches In order to realize effective protection against arcing faults, additional circuit breakers against arcing faults, so-called fire protection switches, are also being used here in Germany. In contrast to the models available on the US market, however, these fire circuit breakers usually have no separate isolating contacts, but are usually used as an independent module, the so-called AFD block, with another Protective device, such as a circuit breaker (so-called LS switch) or a combined line protection / residual current circuit breaker (so-called RCD / MCB), combined. This combination of the two devices then forms the AFDD circuit breaker. In low-voltage electrical installation technology, these protective switching devices are also referred to as "DIN rail mounted devices". This term is due to the fact that in an electrical distribution manifold often a plurality of such modular devices are arranged side by side "in a row”.
  • an electrical connection of the two devices is required to realize a common feed.
  • the two phase connections and the two neutral conductor connections of the two devices are electrically connected to each other.
  • the fire protection switch for this purpose already electrical connection means, the first ends of which are located inside, i. within a switch housing of the fire protection switch, are electrically connected to the terminals, and whose second ends are led out of the housing to be electrically connected to the terminals of the further protective switching device.
  • electrical connection means mostly enamel-insulated copper wires are used, which are already bent such that the second ends are already in the region of the connection elements of the coupled further protective switching device.
  • the problem here is that of the current-carrying elements, ie the leads and the electrical connection means, outgoing heat, since the Monitoring the electrical installation and for detecting occurring arcing arcs used electronic components are relatively sensitive to heat. The accuracy of the evaluation can be significantly influenced by a heat development.
  • the arrangement according to the invention for detecting arcing faults in a low-voltage network has a fire protection switch, with a housing in which a first connection element for electrical contacting with an external neutral conductor and a second connection element for electrical contacting with an external phase conductor are accommodated and held. Furthermore, the arrangement has an electrical first connection element which can be inserted into the first connection element in order to realize an electrically conductive connection to a further protective switching device which can be coupled to the arrangement. Furthermore, the arrangement has a protective element, which can be fastened to the housing of the fire protection switch, wherein the connecting element is received and held in the assembled state non-positively and / or positively by the protective element, whereby a contact protection for the connecting element is realized.
  • the electrical connection of the fire protection switch with the other protective switching device is not performed within the housing of the fire circuit breaker, but is - with the help of the first connecting element - Externally, ie outside the housing of the fire circuit breaker realized.
  • the heating of the fire circuit breaker which is problematic in an internally, ie within the housing, guided electrical connection, significantly reduced.
  • the advantage that the cost of mounting the fire circuit breaker is significantly reduced, since the first connection element only inserted and no longer - as in the case of a rigid, internally guided copper wire conductor - must be threaded into the housing.
  • the further protective switching device may be, for example, a circuit breaker, a residual current circuit breaker or even a combination of circuit breaker and residual current circuit breaker. However, a prerequisite is that this further protective switching device has its own isolating contacts for interrupting the electrical lines - phase line and neutral conductor.
  • the frictional and / or positive retention of the connecting element is realized by means of a retaining contour formed on the protective element.
  • the connecting element can be attached in a simple manner to the protective element.
  • both a non-positive connection acting in a first direction and a second connection oriented in a direction oriented transversely to the first direction are positively connected, ie. a kind of locking connection, between the connecting element and the protective element feasible.
  • the first connecting element has a substantially U-shaped configuration, with a first leg, a second leg and a connecting region connecting the two legs, wherein the first leg for insertion into the first connection element, and the second leg for contacting with the protective switching device are formed.
  • the first connecting element has a rigid, predefined shape, which can be produced in a simple manner and is characterized by easy handling. Furthermore, a higher stability of the first connecting element is achieved by the U-shaped shaping.
  • connection region is substantially U-shaped.
  • connection area serves inter alia to realize the non-positive and / or positive retention of the connecting element on the protective element by means of the protective element formed on the corresponding inversely shaped retaining contour.
  • the connecting element is designed as a sheet metal bent part.
  • the design of the connecting element as a sheet metal bent part represents an extremely cost-effective design.
  • the fire protection switch has an electrical second connection element, the first end of which is electrically conductively connected to the second connection element within the housing of the fire protection switch, and whose second end is led out of the housing to form an electrically conductive connection to the other To realize a protective switching device.
  • the further protective switching device may be, for example, a circuit breaker, a residual current circuit breaker or also a combi device, consisting of a circuit breaker and a residual current circuit breaker, act.
  • this further protective switching device has its own isolating contacts for interrupting the electrical lines - phase line and neutral conductor.
  • the first connection element is designed as an electrical terminal with a clamping screw for clamping the neutral conductor, wherein the connecting element by tightening the clamping screw frictionally connected to the terminal.
  • the second connection element is designed as an electrical connection terminal with a clamping screw for clamping the phase conductor.
  • Screwable terminals represent a robust and simple embodiment for realizing a connection element of a protective switching device.
  • the protective element can be fastened to the housing with the aid of at least one latching connection.
  • Locking connections provide a robust, inexpensive and easy to implement way to attach the protective element to the housing of the fire circuit breaker.
  • Locking connections are usually made of a latching hook and a counter element - for example, a detent opening - which cooperates with the latching hook such that in this way a positive connection of the two connection partners is formed.
  • the latching hook can be used both on the side of the protective element and on the side of the Be formed housing, with a corresponding arrangement of the counter element on the other connection partner.
  • the arrangement further comprises a protective switching device, which is coupled to the fire protection switch, wherein with the aid of the first connection element, an electrically conductive connection between the first connection element of the fire protection switch and a first connection element of the protection device is realized.
  • the coupled embodiment consisting of a fire protection switch with a circuit breaker device already coupled thereto, primarily on the use in a newly built low-voltage electrical installation.
  • FIG. 1B schematically show a known from the prior art fire protection switch 10.
  • the fire protection switch 10 is shown with the housing 13 open.
  • a first connection element 11 for electrical contacting with an external neutral conductor, and a second connection element 12 for electrical contacting with an external phase conductor are received and held in the region of the lower narrow side.
  • the two connection elements 11 and 12 are accessible from the outside via two openings 14 formed in the lower narrow side of the housing 13.
  • FIG. 1A shows a detailed representation of an electrical connection element, which is designed as a terminal, more precisely: as a screw terminal.
  • the terminal has a clamping frame 17 and a clamping screw 15, which in a first direction L relative to the clamping frame 17 is movable.
  • an electrical connection piece 18 is inserted into the clamping frame.
  • an electrical conductor 19 is electrically connected, for example by means of welding or brazing.
  • an external electrical connection line for example a phase or neutral line (not shown) between the clamping screw 15 and the connector 18 are clamped to an electrically conductive connection between the conductor and the fire protection switch 10 to realize.
  • the electrical conductor 19, which in Figure 1C is shown in a detailed view, to produce an electrically conductive connection of the neutral terminal of the fire circuit breaker 10 with a to be coupled with the fire protection switch 10, another protective device - for example, a circuit breaker, a residual current circuit breaker or a combination of both switching devices.
  • another protective device for example, a circuit breaker, a residual current circuit breaker or a combination of both switching devices.
  • the electrical conductor inside the device ie within the housing 13, electrically conductively connected to the connector 18 and at least partially guided within the housing 13.
  • the conductor 19 comes out of the housing 13 and is led outside the housing 13 to an electrical connection element (not shown) of the further protective switching device to be coupled. Due to the cramped space within the fire circuit breaker 10 a complex current flow is required, which is why the head 19 bent several times from a piece of wire and thereby adapted to the geometric conditions within the housing 13 of the fire circuit breaker 10.
  • FIG. 1D finally shows the known from the prior art fire protection switch 10 with a mounted in the narrow side protection element 30.
  • the protective element 30 is latched to the narrow side of the housing 13 and serves to cover the electrical conductor 19. In this way, a contact protection of the electrical conductor 19 realized.
  • FIGS. 2A and 2B show schematic representations of the first connecting element 20 and the protective element 30.
  • Figure 2A shows the two parts in the disassembled state, while in FIG. 2B are shown in the assembled state.
  • the first connecting element 20 has a substantially U-shaped configuration, with a first leg 21 a second leg 22 and a connecting portion 23 connecting the first leg 21 and the second leg 22.
  • the first leg 21 is for insertion into the first connecting element 11 of the fire protection switch 10 is provided and formed.
  • the second leg 22 for insertion into a first connection element 41 of a to be coupled to the fire protection switch 10 further protective switching device 40 (see FIG. 3C ) provided and trained.
  • the connecting region 23 is also substantially U-shaped, whereby a sufficient stability of the first connecting element 20 is achieved. Therefore, the first connecting element 20 can also be produced in a simple and cost-effective manner as a stamped part or as a sheet metal bent part.
  • the protective element 30 is therefore made of a non-conductive material, such as plastic, and is attached to the narrow side of the fire circuit breaker housing 13.
  • the protective element 30 has a latching hook 36, which with a formed on the narrow side of the housing 13 latching opening 26 (see 3A and Figure 3C ) is locked.
  • the protective element 30 on its in the assembled state of the narrow side of the fire circuit breaker housing 13 facing inside 32 a holding contour 31, which serves for the positive and / or non-positive fixing of the first connecting element 20.
  • the holding contour has essentially two parallel, U-shaped guide webs, between which the connecting region 23 can be inserted.
  • one or more locking means can be formed on the guide webs, which prevent the connecting means 20 from slipping out.
  • FIGS. 3A to 3C is the inventive arrangement, which consists essentially of the fire protection switch 10, the first connecting element 20 and the protective element 30 and - FIG. 3C shown - the further protection switching device 40 is shown schematically.
  • FIG. 3A shows a so-called exploded view of the arrangement consisting of the fire protection switch 10, the first connection element 20, and the protective element 30.
  • the housing 13 of the fire protection switch 10 has in the region of its narrow side two openings 14, behind which the first connection element 11 and the second connection element 12 are arranged. Through the openings 14 of the fire protection switch 10 with the electrical connection cables (phase line and neutral line) of an electrical installation is electrically connected.
  • the protective element 30 also has two openings 34.
  • a second connecting element 25 which is electrically conductively connected within the housing 13 to the second connecting element 12, led out of the housing 13 through a further opening.
  • a latching opening 26 for latching the protective element 30 is formed on the narrow side, for this purpose, the latching hook 36 integrally formed on the protective element 30 engages in the latching opening 26.
  • FIG. 3B shows one too FIG. 3A Corresponding representation of the arrangement in which the individual parts are mounted.
  • the first connecting element 20 is inserted on the one hand into the retaining contour 31 of the protective element 30, and on the other hand with its first leg 21 into the first connecting element 11 of the fire protection switch 10.
  • the protective element 30 is fixed by means of the latching connection 26, 36 on the narrow side of the fire protection switch housing 13, so that the inner side 32 of the protective element 30 faces the narrow side of the housing 13.
  • a contact protection for both the first connecting element 20, as well as for the second connecting element 25, is realized.
  • FIG. 3C is finally in the FIGS. 3A and 3B shown arrangement coupled to another protective switching device 40, wherein the protective element 30 has been omitted.
  • the first connection element 30 electrically conductively connects the first connection element 11 of the fire protection switch 10 to the first connection element 41 of the further protection switching device 40, by being plugged into the connection elements 11 and 41 from the outside.
  • the second connection element 12 of the fire protection switch 10 is electrically conductively connected to the second connection element 42 of the further protection switching device 40 by the lead out of the housing 13, rigid second connecting element 25.

Landscapes

  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (10)

  1. Système de détection d'arcs électriques parasites dans un réseau basse tension, comportant :
    - un interrupteur de protection incendie (10) avec un boîtier (13) dans lequel est logé et maintenu un premier élément de raccordement (11) pour l'établissement d'un contact électrique avec un conducteur neutre externe, et un deuxième élément de raccordement (12) pour l'établissement d'un contact électrique avec un conducteur de phase externe et
    - un élément de protection (30) qui peut être fixé au boîtier (13) de l'interrupteur de protection incendie (10),
    caractérisé en ce que
    le système comporte un premier élément de liaison électrique (20) qui peut être enfiché dans le premier élément de raccordement (11) pour réaliser une liaison électriquement conductrice vers un autre disjoncteur de protection (40) couplable au système, l'élément de liaison (20) étant, lorsqu'il est monté, logé et maintenu par force et/ou complémentarité de forme par l'élément de protection (30), de sorte qu'une protection anti-contact est réalisée pour l'élément de liaison (20).
  2. Système selon la revendication 1, selon lequel le maintien par force et/ou complémentarité de forme de l'élément de liaison (20) est réalisé au moyen d'un contour de maintien (31) réalisé sur l'élément de protection (30).
  3. Système selon l'une des revendications précédentes, selon lequel le premier élément de liaison (20) présente une forme sensiblement en U, avec une première branche (21), une deuxième branche (22) et une zone de liaison (23) reliant les deux branches (21, 22), la première branche (21) étant réalisée pour être emboîtée dans le premier élément de raccordement (11) et la deuxième branche (22), pour établir un contact avec le disjoncteur de protection (40).
  4. Système selon la revendication 3, selon lequel la zone de liaison (23) est réalisée sensiblement en forme de U.
  5. Système selon l'une des revendications précédentes, selon lequel l'élément de liaison (20) est réalisé en tant que pièce de tôle pliée.
  6. Système selon l'une des revendications précédentes, selon lequel l'interrupteur de protection incendie (10) comporte un deuxième élément de liaison électrique (25) dont la première extrémité est reliée de manière électriquement conductrice au deuxième élément de raccordement (11) à l'intérieur du boîtier (13) de l'interrupteur de protection incendie (10) et dont la deuxième extrémité sort du boîtier (13) pour établir une liaison électriquement conductrice avec l'autre disjoncteur de protection (40).
  7. Système selon l'une des revendications précédentes, selon lequel le premier élément de raccordement (11) est réalisé en tant que borne de raccordement électrique (14) avec une vis de serrage (15) pour serrer le conducteur neutre, l'élément de liaison (20) pouvant être relié par force à la borne de raccordement (14) par serrage de la vis de serrage (15).
  8. Système selon l'une des revendications précédentes, selon lequel le deuxième élément de raccordement (11) est réalisé en tant que borne de raccordement électrique (14) avec une vis de serrage (15) pour serrer le conducteur de phase.
  9. Système selon l'une des revendications précédentes, selon lequel l'élément de protection (30) peut être fixé au boîtier (13) à l'aide d'au moins une liaison par encliquetage (16, 36).
  10. Système selon l'une des revendications précédentes, comportant en outre un disjoncteur de protection (40) qui est couplé à l'interrupteur de protection incendie (10), une liaison électriquement conductrice entre le premier élément de raccordement (11) de l'interrupteur de protection incendie (10) et un premier élément de raccordement (41) du disjoncteur de protection (40) étant réalisée à l'aide du premier élément de liaison (20).
EP15161625.7A 2014-08-05 2015-03-30 Système de détection d'arcs électriques parasites dans un réseau basse tension Active EP2983191B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202014006362.1U DE202014006362U1 (de) 2014-08-05 2014-08-05 Anordnung zur Erfassung von Störlichtbögen in einem Niederspannungsnetz

Publications (2)

Publication Number Publication Date
EP2983191A1 EP2983191A1 (fr) 2016-02-10
EP2983191B1 true EP2983191B1 (fr) 2017-04-26

Family

ID=51685380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15161625.7A Active EP2983191B1 (fr) 2014-08-05 2015-03-30 Système de détection d'arcs électriques parasites dans un réseau basse tension

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EP (1) EP2983191B1 (fr)
DE (1) DE202014006362U1 (fr)
ES (1) ES2633794T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014226221B4 (de) 2014-12-17 2024-08-29 Siemens Aktiengesellschaft Niederspannungs-Schutzschaltgerät und Anordnung zur Überwachung eines Stromkreises in einem Niederspannungsnetz
CN106356254B (zh) * 2015-07-16 2018-07-27 上海良信电器股份有限公司 一种连杆式接线端子

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Publication number Priority date Publication date Assignee Title
DE4013223C2 (de) * 1990-04-26 1999-02-11 Abb Patent Gmbh Netzeinspeiseklemme
US5729145A (en) 1992-07-30 1998-03-17 Siemens Energy & Automation, Inc. Method and apparatus for detecting arcing in AC power systems by monitoring high frequency noise
US6031699A (en) 1998-11-23 2000-02-29 Siemens Energy & Automation, Inc. Arc fault detector apparatus, means and system
DE202007011974U1 (de) * 2007-08-27 2007-11-29 Phoenix Contact Gmbh & Co. Kg Baueinheit bestehend aus einem Fehlerstromschutzschalter und einem Überspannungsschutzgerät
US8369052B2 (en) * 2008-07-25 2013-02-05 Siemens Industry, Inc. Modular circuit breaker
DE102012204964A1 (de) * 2012-03-28 2013-10-02 Siemens Aktiengesellschaft Schutzschaltgerät und Schutzschaltgerätanordnung

Non-Patent Citations (1)

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Title
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Publication number Publication date
ES2633794T3 (es) 2017-09-25
EP2983191A1 (fr) 2016-02-10
DE202014006362U1 (de) 2014-09-18

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