EP1480242A2 - Vorrichtung für Niederspannungsschutzschalter - Google Patents

Vorrichtung für Niederspannungsschutzschalter Download PDF

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Publication number
EP1480242A2
EP1480242A2 EP04076451A EP04076451A EP1480242A2 EP 1480242 A2 EP1480242 A2 EP 1480242A2 EP 04076451 A EP04076451 A EP 04076451A EP 04076451 A EP04076451 A EP 04076451A EP 1480242 A2 EP1480242 A2 EP 1480242A2
Authority
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.)
Granted
Application number
EP04076451A
Other languages
English (en)
French (fr)
Other versions
EP1480242A3 (de
EP1480242B1 (de
Inventor
Gabriele Colombo
Aleberto Antoniazzi
Claudio Readaelli
Sergio Valagussa
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.)
ABB SpA
Original Assignee
ABB Service SRL
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Filing date
Publication date
Application filed by ABB Service SRL filed Critical ABB Service SRL
Publication of EP1480242A2 publication Critical patent/EP1480242A2/de
Publication of EP1480242A3 publication Critical patent/EP1480242A3/de
Application granted granted Critical
Publication of EP1480242B1 publication Critical patent/EP1480242B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.
  • 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 protection devices 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 40 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.
  • the kinematic chain for protection devices for electrical networks thus conceived may undergo numerous modifications and variations, all falling within the scope of the inventive idea; in addition, all the items may be replaced by other technically equivalent ones.
  • the materials used, as well as the dimensions and shapes, may be any whatsoever according to the requirements and the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Amplifiers (AREA)
  • Breakers (AREA)
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 true EP1480242A2 (de) 2004-11-24
EP1480242A3 EP1480242A3 (de) 2006-08-02
EP1480242B1 EP1480242B1 (de) 2011-10-05

Family

ID=33042672

Family Applications (1)

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

Country Status (3)

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

Citations (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
US4288768A (en) * 1978-08-04 1981-09-08 Firma Heinrich Kopp Gmbh & Co. Kg. Electrical full protection circuit breaker
DE29520288U1 (de) * 1995-12-21 1996-02-08 Kopp Heinrich Ag Fehlerstrom-Schutzschalter mit Montageteil
EP1033737A1 (de) * 1999-03-04 2000-09-06 ABB Ricerca SpA Auslösevorrichtung
EP1069586A2 (de) * 1999-07-15 2001-01-17 Power Controls Iberica, SL Auslösemechanismus für Automatische Schalter

Patent Citations (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
US4288768A (en) * 1978-08-04 1981-09-08 Firma Heinrich Kopp Gmbh & Co. Kg. Electrical full protection circuit breaker
DE29520288U1 (de) * 1995-12-21 1996-02-08 Kopp Heinrich Ag Fehlerstrom-Schutzschalter mit Montageteil
EP1033737A1 (de) * 1999-03-04 2000-09-06 ABB Ricerca SpA Auslösevorrichtung
EP1069586A2 (de) * 1999-07-15 2001-01-17 Power Controls Iberica, SL Auslösemechanismus für Automatische Schalter

Also Published As

Publication number Publication date
EP1480242A3 (de) 2006-08-02
ITBG20030035A1 (it) 2004-11-21
ATE527676T1 (de) 2011-10-15
EP1480242B1 (de) 2011-10-05

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