EP1480242B1 - Vorrichtung für Niederspannungsschutzschalter - Google Patents

Vorrichtung für Niederspannungsschutzschalter Download PDF

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Publication number
EP1480242B1
EP1480242B1 EP04076451A EP04076451A EP1480242B1 EP 1480242 B1 EP1480242 B1 EP 1480242B1 EP 04076451 A EP04076451 A EP 04076451A EP 04076451 A EP04076451 A EP 04076451A EP 1480242 B1 EP1480242 B1 EP 1480242B1
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EP
European Patent Office
Prior art keywords
transmission lever
kinematic chain
elements
transmission
lever
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.)
Expired - Lifetime
Application number
EP04076451A
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English (en)
French (fr)
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EP1480242A2 (de
EP1480242A3 (de
Inventor
Gabriele Colombo
Aleberto Antoniazzi
Claudio Readaelli
Sergio Valagussa
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ABB SpA
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ABB SpA
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Classifications

    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • 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
    • H01H83/22—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 condition being imbalance of two or more currents or voltages
    • H01H83/226—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 condition being imbalance of two or more currents or voltages with differential transformer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches

Definitions

  • the present invention relates to a device to be used in protection apparatuses for low-voltage electrical networks, which may be, for example, residual-current units appropriately coupled to a circuit-breaking unit.
  • a further, and even more important, purpose is to protect persons from the so-called direct contacts, i.e., accidental contacts with a conductor carrying electric current, specifically with a phase of the circuit, which may be a stripped wire, a broken socket, etc., but also from indirect contacts, i.e., contacts with a conductive body that is normally insulated, such as the casing of an electrical household appliance, which, on account of a fault or failure or a random event, happens to come into contact with a phase of the circuit and is hence at a dangerous voltage.
  • direct contacts i.e., accidental contacts with a conductor carrying electric current, specifically with a phase of the circuit, which may be a stripped wire, a broken socket, etc.
  • indirect contacts i.e., contacts with a conductive body that is normally insulated, such as the casing of an electrical household appliance, which, on account of a fault or failure or a random event, happens to come into contact with a phase of the circuit and is hence at a dangerous voltage.
  • Protection apparatuses for low-voltage electrical networks are disclosed, for example, in FR 1.371.007 , EP 1.069.586 and GB 773.193 .
  • Existing protection devices of a residual-current type envisage the use of a kinematic chain comprising essentially a first series of lever mechanisms dedicated to moving a contact-bearing shaft, and a second series of lever mechanisms dedicated, instead, to interfacing the first series of lever mechanisms with an actuation device generally constituted by a relay.
  • the latter may be directly activated via current-sensor means designed to detect the presence of currents of a residual type.
  • the first series of lever mechanisms that enables rotation of the contact-bearing shaft and the consequent passage of current inside the circuit is actuated.
  • the relay actuates the second series of lever mechanisms, which acts directly on the first series releasing the latter from the position reached previously and thus enabling return of the contact-bearing shaft into the initial position. In this way, the interruption of the current flow inside the circuit is guaranteed.
  • an apparatus containing only the residual-current part is coupled, for example, to an appropriate circuit-breaking unit located inside another apparatus.
  • the kinematic chains usually employed must often be largely redesigned and adapted to the various needs.
  • the kinematic chain normally used must envisage further and different transmission elements which enable actuation of the interruption unit according to what is detected by the sensors constituting the residual-current part.
  • the main task of the present invention is to provide a kinematic chain to be used in the production of protection devices for low-voltage electrical networks which will enable the drawbacks mentioned above to be overcome.
  • the main purpose of the present invention is to provide a kinematic chain designed to transmit motion to an external kinematic structure.
  • a further purpose of the present invention is to provide a kinematic chain which will comprise components that can easily be assembled together and can easily be assembled to the other components constituting the protection apparatus for electrical networks.
  • a kinematic chain for low-voltage devices in particular for protection of a residual-current type comprising:
  • the kinematic chain according to the invention is characterized in that said third elements for actuation comprise a first shaft connected to a system of mobile contacts or to a device for providing mechanical resistance.
  • Said fourth elements for transmission of motion comprise at least one first motion-transmission lever and, in the case where the first shaft is connected to the mechanical-resistance device, further comprise at least one second transmission lever and one third transmission lever.
  • the second transmission lever is connected to the first lever and to said transmission shaft.
  • the third lever is connected to said first lever and to a further low-voltage device.
  • the main advantage of the invention is represented by the presence of transmission means specifically dedicated to transmission and in any case present whatever the functionality required of the kinematic chain itself.
  • the kinematic chain 1 comprises first elements 10 for manoeuvring, second elements 20 for engagement/release, third elements 30 for actuation, and fourth elements for transmission of motion.
  • the first elements 10 for manoeuvring may comprise, for example, a knob 11 which enables movement of a first series of lever mechanisms that act on said third elements 30 for actuation.
  • the second elements 20 for engagement/release are actuated by the protection relay, which, in turn, is controlled by sensor means that detect the presence of currents of a residual type. Said second elements 20 for engagement/release make it possible to act on said first elements 10 for manoeuvring, in order to cause the action of the latter on said actuating elements 30, which move said fourth elements for transmission of motion, to cease.
  • the kinematic chain according to the invention is characterized in that the aforesaid third elements 30 for actuation comprise a first shaft connected to a system of mobile contacts or else to a mechanical-resistance device having the purpose of reproducing the conditions of operation that are usually characteristic of the system of mobile contacts.
  • the fourth elements for transmission of motion in any case comprise a first motion-transmission lever 50 and, in the case where said first shaft is connected to the aforesaid mechanical-resistance device, further comprise a second transmission lever 60 and a third transmission lever 70.
  • the second motion-transmission lever 60 is connected to the first transmission lever 50 and to the first transmission shaft, whilst the third transmission lever is connected, instead, to said first lever and to a further low-voltage device.
  • the mechanical-resistance device indicated above comprises elastic means chosen so as to reproduce the same parameters of motion and force that are usually supplied by the system of mobile contacts.
  • the first elements 10 for manoeuvring albeit acting on a structure that is substantially different from the usual one, act producing the same effect of rotation on the first shaft.
  • these elastic means comprise a spring positioned in such a way that it is substantially concentric to the first shaft.
  • the first elements 10 for manoeuvring, the second elements 20 for engagement/release, and the third elements 30 for actuation are substantially contained within a first containment side piece 100 and a second containment side piece 200 which can be coupled together, for example, via the use of blocking pins.
  • the fourth elements for transmission of motion are, instead, located on the outside of the two side pieces and, in particular, are associated on the outside of the first side piece 100 and of the second side piece 200.
  • the first transmission lever 50 is associated to one of the two side pieces 100 via a first turning pair and, according to a preferred embodiment, said first lever 50 is positioned within a first seat 80 made on the outside on the side piece itself. In this way, the lateral encumbrance is limited so that no problem is created in the assembly step for the insertion of the side pieces 100 and 200 within the corresponding containment box of the protection device.
  • the first seat 80 has dimensions such as to enable a well pre-defined rotation of the first transmission lever 50.
  • the rotation of the first lever 50 is obtained via a turning pair comprising a first pin 52 and a first seat 53 made on the first transmission lever 50 and on said first seat 80.
  • Figure 2 clearly indicates the above embodiment of said first pair, and also shows the axis of rotation of said pair, which advantageously coincides precisely with the direction of insertion of the first transmission lever 50 in the corresponding seat 80, a direction of insertion that is substantially orthogonal to the containment side pieces.
  • FIG. 3 illustrates, instead, the insertion, within the kinematic chain, of a second transmission lever 60 with which a transmission element very similar to a U bolt is indicated, which is used in the fabrication of the manoeuvring means 10.
  • This second transmission lever 60 is advantageously connected to the first transmission lever 50 and to said first shaft through a second turning pair and a third turning pair, respectively.
  • the second turning pair comprises a second pin that is made, for example, on one first end 61 of the second transmission lever 60 and can be inserted in a third seat 62 made on the first transmission lever 50.
  • the third pair comprises a third pin, which is made advantageously on said second end 65 of said second transmission lever 50 and can be inserted in a fourth seat made on the first shaft, in a position eccentric with respect to the axis of rotation of the latter.
  • a shaped opening 90 On the side piece 100 that houses the first transmission lever 50 there is also made a shaped opening 90, which has the purpose of guiding the movement of the second transmission lever as indicated hereinafter in the description.
  • This opening 90 enables translation of the second transmission lever in a plane substantially coincident with that of the side piece, and, at the same time, a rotation about an axis that is substantially orthogonal to the side piece itself.
  • the third transmission lever 70 is connected to the first transmission lever 50 through a fourth turning pair and is connected at a first end 81 to a further protection device.
  • it represents the final element that enables connection between the kinematic chain contained on the inside of the first protection device and a generic external kinematic structure that can be actuated through the former.
  • said fourth turning pair comprises a fourth pin, made advantageously on one second end of said third transmission lever 70, and a fifth seat 83 made on the first transmission lever 50.
  • the first transmission lever 50 also comprises a projection 96, which is exploited to impose on the transmission lever 70 a rotation that is pre-defined as regards amplitude and direction, leaving freedom of movement to the lever itself for a possible rotation in a direction opposite to said direction.
  • the positioning of the external transmission elements enables the same containment side pieces, the same first elements for manoeuvring, and the same second elements for engagement/release to be used both in the case where the apparatus is used by itself and in the case where it is coupled to a second apparatus.
  • This is extremely convenient from the assembly point of view in so far as it enables use of just one assembly line, were necessary introducing simply a station dedicated to positioning of the transmission levers described above.
  • the technical solutions adopted for the kinematic chain enable the pre-set tasks and purposes to be fully achieved.
  • the kinematic chain is pre-arranged for an easy and fast coupling with an external kinematic structure via the use of few components that are easy to manufacture and that can be readily coupled together.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Breakers (AREA)
  • Amplifiers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (13)

  1. Kinematische Kette (1) für Niedrigspannungsvorrichtungen, insbesondere zum Schutz vor Fehlerstrom, aufweisend:
    - erste Elemente (10) für ein Manövrieren;
    - zweite Elemente (20) für ein Verbinden/Lösen, die mit einem Fehlerstrom-Schutzrelais verbunden sind;
    - dritte Elemente (30) für ein Betätigen; und
    - vierte Elemente für ein Übertragen von Bewegung;
    wobei die kinematische Kette dadurch gekennzeichnet ist, dass die dritten Elemente (30), die für ein Betätigen da sind, eine erste Welle aufweisen, die mit einem System beweglicher Kontakte oder mit einer Vorrichtung zur Bereitstellung eines mechanischen Widerstands verbunden ist, wobei die vierten Elemente, die für ein Übertragen von Bewegung da sind, mindestens einen ersten Bewegungsübertragungshebel (50) aufweisen und, falls die erste Welle mit der mechanischen Widerstandsvorrichtung verbunden ist, ferner mindestens einen zweiten Übertragungshebel (60) und einen dritten Übertragungshebel (70) aufweisen, wobei der zweite Übertragungshebel (60) mit dem ersten Hebel (50) und mit der Übertragungswelle verbunden ist, wobei der dritte Hebel (70) mit dem ersten Hebel (50) und mit einer weiteren Niederspannungsvorrichtung verbunden ist.
  2. Kinematische Kette (1) nach Anspruch 1, dadurch gekennzeichnet, dass die mechanische Widerstandsvorrichtung ein elastisches Mittel aufweist, das so gewählt ist, dass es die gleichen Bewegungs- und Kraftparameter reproduziert, die üblicherweise von dem System beweglicher Kontakte geliefert werden.
  3. Kinematische Kette (1) nach Anspruch 2, dadurch gekennzeichnet, dass das elastische Mittel eine Feder aufweist, die derart angeordnet ist, dass sie im Wesentlichen konzentrisch mit der ersten Welle ist.
  4. Kinematische Kette (1) nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die ersten Elemente (10) für ein Manövrieren, die zweiten Elemente (20) für ein Verbinden/Lösen und die dritten Elemente (30) für ein Betätigen im Wesentlichen zwischen einem ersten begrenzenden Seitenteil (100) und einem zweiten begrenzenden Seitenteil (20), die miteinander verbunden werden können, angeordnet sind, wobei die vierten Elemente für ein Übertragen von Bewegung sich in Bezug auf das erste begrenzende Seitenteil (100) oder auf das zweite begrenzende Seitenteil (200) außen befinden.
  5. Kinematische Kette (1) nach Anspruch 4, dadurch gekennzeichnet, dass der erste Übertragungshebel (50) über mindestens ein erstes Drehpaar mit dem ersten begrenzenden Seitenteil (100) oder mit dem zweiten begrenzenden Seitenteil (200) verbunden ist.
  6. Kinematische Kette (1) nach Anspruch 4 oder Anspruch 5, dadurch gekennzeichnet, dass der erste Übertragungshebel (50) in einer ersten Aufnahme (80) angeordnet ist, die an der Außenseite des ersten begrenzenden Seitenteils (100) oder des zweiten begrenzenden Seitenteils (200) ausgebildet ist, wobei die erste Aufnahme (51) solche Abmessungen hat, dass sie eine Drehung des ersten Hebels (50) über einen vorgegebenen Winkel ermöglicht.
  7. Kinematische Kette (1) nach einem oder mehreren der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Drehpaar einen ersten Zapfen (52) und eine zweite Aufnahme (53), die an dem ersten Übertragungshebel (50) und an der ersten Aufnahme (80) ausgebildet sind, aufweist.
  8. Kinematische Kette (1) nach Anspruch 1, dadurch gekennzeichnet, dass der zweite Übertragungshebel (60) über ein zweites Drehpaar und ein drittes Drehpaar vorteilhafterweise mit dem ersten Übertragungshebel (50) bzw. mit der zweiten Welle verbunden ist.
  9. Kinematische Kette (1) nach Anspruch 8, dadurch gekennzeichnet, dass das zweite Drehpaar einen zweiten Zapfen aufweist, der an einem ersten Ende (61) des zweiten Übertragungshebels (60) ausgebildet ist, und der in eine dritte Aufnahme (62) eingeführt werden kann, die an dem ersten Übertragungshebel (50) ausgebildet ist, und dadurch gekennzeichnet ist, dass das dritte Paar einen dritten Zapfen aufweist, der an dem zweiten Ende (65) des zweiten Übertragungshebels (50) ausgebildet ist und in eine vierte Aufnahme eingeführt werden kann, die an der ersten Welle ausgebildet ist.
  10. Kinematische Kette (1) nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das erste seitliche Begrenzungsteil (100) oder das zweite seitliche Begrenzungsteil (200), mit dem der erste Übertragungshebel (50) verbunden ist, eine Öffnung (90) aufweist, die so gestaltet ist, dass sie die Bewegung des zweiten Übertragungshebels (60) lenkt.
  11. Kinematische Kette (1) nach Anspruch 1, dadurch gekennzeichnet, dass der dritte Übertragungshebel (70) über ein viertes Drehpaar mit dem ersten Übertragungshebel (50) verbunden ist und über ein viertes Ende (81) mit der weiteren Schutzvorrichtung verbunden ist.
  12. Kinematische Kette (1) nach Anspruch 11, dadurch gekennzeichnet, dass das vierte Drehpaar einen vierten Zapfen aufweist, der an einem zweiten Ende des dritten Übertragungshebels (70) ausgebildet ist und in einer fünften Aufnahme (83) eingeführt werden kann, der am ersten Übertragungshebel (50) ausgebildet ist.
  13. Kinematische Kette (1) nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der erste Übertragungshebel (50) auch mindestens einen Vorsprung (96) aufweist, so dass eine Drehung auf den dritten Übertragungshebel (70) übertragen wird, die in Bezug auf Amplitude und Richtung während der Drehung des ersten Übertragungshebels (50) vordefiniert ist.
EP04076451A 2003-05-20 2004-05-18 Vorrichtung für Niederspannungsschutzschalter Expired - Lifetime EP1480242B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000035A ITBG20030035A1 (it) 2003-05-20 2003-05-20 Dispositivo per interrutori di bassa tensione
ITBG20030035 2003-05-20

Publications (3)

Publication Number Publication Date
EP1480242A2 EP1480242A2 (de) 2004-11-24
EP1480242A3 EP1480242A3 (de) 2006-08-02
EP1480242B1 true EP1480242B1 (de) 2011-10-05

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ID=33042672

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Application Number Title Priority Date Filing Date
EP04076451A Expired - Lifetime EP1480242B1 (de) 2003-05-20 2004-05-18 Vorrichtung für Niederspannungsschutzschalter

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EP (1) EP1480242B1 (de)
AT (1) ATE527676T1 (de)
IT (1) ITBG20030035A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB773193A (en) * 1955-09-30 1957-04-24 Chilton Aircraft Company Ltd Improvements in and relating to electrical circuit-breakers
FR1371007A (fr) * 1963-09-26 1964-08-28 Siemens Ag Disjoncteur électrique de sécurité avec interrupteur déclenché par des excès de courant, des courts-circuits et des courants de défaut
DE2834327C2 (de) * 1978-08-04 1983-01-13 Heinrich Kopp Gmbh & Co Kg, 8756 Kahl Elektrischer Vollschutzschalter
DE29520288U1 (de) * 1995-12-21 1996-02-08 Kopp Heinrich Ag Fehlerstrom-Schutzschalter mit Montageteil
IT1311069B1 (it) * 1999-03-04 2002-02-28 Abb Ricerca Spa Dispositivo di sgancio per l'apertura dei contatti di uninterruttore ad esso associato
ES2157161B1 (es) * 1999-07-15 2002-02-16 Power Controls Iberica Sl Mecanismo de disparo para interruptores automaticos.

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Publication number Publication date
ITBG20030035A1 (it) 2004-11-21
ATE527676T1 (de) 2011-10-15
EP1480242A2 (de) 2004-11-24
EP1480242A3 (de) 2006-08-02

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