EP0949645A2 - Dispositif de contacts auxiliaires pour disjoncteur magnéto-thermique - Google Patents

Dispositif de contacts auxiliaires pour disjoncteur magnéto-thermique Download PDF

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Publication number
EP0949645A2
EP0949645A2 EP99200905A EP99200905A EP0949645A2 EP 0949645 A2 EP0949645 A2 EP 0949645A2 EP 99200905 A EP99200905 A EP 99200905A EP 99200905 A EP99200905 A EP 99200905A EP 0949645 A2 EP0949645 A2 EP 0949645A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
accessory device
lever
auxiliary contact
projection
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
EP99200905A
Other languages
German (de)
English (en)
Other versions
EP0949645A3 (fr
EP0949645B1 (fr
Inventor
Elio Jacovino
Claudio Redaelli
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 SACE SpA
Original Assignee
ABB Elettrocondutture SpA
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 ABB Elettrocondutture SpA filed Critical ABB Elettrocondutture SpA
Publication of EP0949645A2 publication Critical patent/EP0949645A2/fr
Publication of EP0949645A3 publication Critical patent/EP0949645A3/fr
Application granted granted Critical
Publication of EP0949645B1 publication Critical patent/EP0949645B1/fr
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
    • H01H71/04—Means for indicating condition of the switching device
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • H01H71/462—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts housed in a separate casing, juxtaposed to and having the same general contour as the main casing

Definitions

  • the present invention relates to a driven-type accessory device, particularly to an auxiliary contact accessory device for a magnetothermal circuit breaker associated therewith.
  • magnetothermal circuit breaker to which reference is made herein is of the bipolar type with phase and neutral poles and is disclosed in the Italian patent application no. MI97A002544 in the name of the same Applicant; the description of said application is assumed included herein as reference.
  • magnetothermal circuit breakers are generally constituted by an insulating casing inside which moving contacts are provided which mate with corresponding fixed contacts.
  • the moving contacts comprise phase contacts and neutral contacts which are mechanically different from each other and which, depending on the applications and/or on the applicable national statutory provisions, can be located alternatively on the right side or on the left side of said circuit breaker when viewed from the front.
  • Accessory devices are externally associated with said circuit breakers and are conventionally of two kinds, respectively driving and driven, depending on whether they act on the circuit breaker, actuating an action thereof, or perform an action as a function of a command received from said circuit breaker.
  • a driving accessory device can be constituted by a relay which, for example, when it detects a network voltage value which is lower than a certain preset threshold, supplies an opening command to the circuit breaker associated therewith.
  • the circuit breaker changes its state from a condition in which its contacts are closed to one in which its contacts are open, and by means of appropriate lever systems it triggers a kinematic mechanism inside a device for indicating the state of the circuit breaker associated therewith, which accordingly constitutes a driven device.
  • Said driven device then provides the operators with a signal which corresponds to the current state of the circuit breaker.
  • driving accessory devices are always installed on the same side of the circuit breaker, for example on the left of the associated circuit breaker, while driven ones, to which the present invention relates, are installed on the other side, i.e., on the right.
  • the kinematic mechanisms for opening the contacts of the circuit breaker can be negatively affected by the corresponding kinematic systems of the accessory device; in particular, the opening speed of the circuit breaker might be reduced, consequently leading to misfunctioning or even breakage of said circuit breaker.
  • Another inherent drawback of known devices for indicating the state of the circuit breaker associated therewith consists in that when the circuit breaker opens for any reason, for example because of a short-circuit current or a thermal overload, the accessory device, by changing its state from closed to open, sends a corresponding alarm signal, which can be of the visual type, for example by lighting a lamp on a panel, or of the acoustic type, by means of an alarm siren. If the circuit breaker opens, triggering due to a fault, in the current state of the art driven accessory devices are not provided with means for local visual indication which allow an operator to immediately identify which circuit breaker has been triggered and to reset the device itself in order to stop the alarm signal without acting on the triggered circuit breaker.
  • the aim of the present invention is to provide an auxiliary contact accessory device for a magnetothermal circuit breaker associated therewith, in which coupling to the circuit breaker occurs fully independently of the position of the poles inside said circuit breaker.
  • an object of the present invention is to provide an auxiliary contact accessory device for a magnetothermal circuit breaker associated therewith, wherein the coupling to the circuit breaker does not affect at all the kinematic mechanisms of said circuit breaker, accordingly leaving its design characteristics unchanged, particularly in terms of contact opening times.
  • Another object of the present invention is to provide an auxiliary contact accessory device for a magnetothermal circuit breaker associated therewith in which there is a local visual indication of an open state of the circuit breaker.
  • Another object of the present invention is to provide an auxiliary contact accessory device for a magnetothermal circuit breaker associated therewith in which it is possible to test the device itself before coupling to the circuit breaker.
  • Another object is to provide an auxiliary contact accessory device for a magnetothermal circuit breaker associated therewith in which, after the device has been installed in a system, it is possible to test the auxiliary functions of said system without having to set the circuit breaker associated therewith to the closed position (thus connecting the main system to the power supply): "blank test”.
  • Another object of the present invention is to provide an auxiliary contact accessory device for a magnetothermal circuit breaker associated therewith which is highly reliable, relatively easy to manufacture and at competitive costs.
  • an auxiliary contact accessory device for a magnetothermal circuit breaker particularly of the bipolar type with phase and neutral poles, which is associated therewith, comprising an insulating casing which contains fixed contacts and a corresponding moving contact and connection terminals, and a kinematic mechanism, characterized in that said kinematic mechanism comprises:
  • the accessory device comprises an insulating casing 1 inside which fixed contacts 17 are provided which operatively couple to a moving contact 3 (changeover contact); said contacts are connected to connection terminals 60.
  • the moving contact 3 is of the laminar type.
  • the moving contact 3 is actuated by means of a suitable kinematic mechanism which is generally designated by the reference numeral 100 and is in turn actuated by a corresponding change of state of the contacts of the associated magnetothermal circuit breaker, which is not shown in the Figures.
  • Said kinematic mechanism 100 comprises means for coupling to the circuit breaker, means for actuating the moving contact, means for the local visual indication of an open circuit breaker state and means for testing the correct operation of said fixed and moving contacts.
  • said means for actuating the moving contact comprise a contact actuation lever 13 and a transmission lever 10.
  • the transmission lever 10 is pivoted to a point 101 of the casing 1 and is held in an inactive position (which corresponds to a closed state of the associated circuit breaker) by a spring 15.
  • the transmission lever 10 is detachably connected, by means of a U-shaped element 11, to the contact actuation lever 13 and to a disengagement lever 12 which belongs to said means for coupling to the circuit breaker.
  • Said contact actuation lever 13 and the disengagement lever 12 are pivoted in a point 102 of the casing 1; a spring 14 acts on the contact actuation lever 13.
  • the contact actuation lever 13 In an inactive position, which corresponds to the position in which the circuit breaker is closed, the contact actuation lever 13 has an end 25 which is directly in contact with the lamina 3; moreover, on the contact actuation lever 13 a slot 33 is provided in which the U-shaped element 11 can slide.
  • said end 25 can have a round-shaped profile as shown in Figure 4, or a polygonal-shaped profile as shown in Figures 1-3.
  • the disengagement lever 12 comprises a pin 7 for coupling to the mechanism for actuating the circuit breaker and has the particularity that it has a toothed sector 18, whose function will be described hereinafter.
  • Said means for actuating the moving contact further comprise a reset and indication lever 4 which is pivoted to a fixed point 103 of the insulating casing 1 and is held in the inactive position by a spring 5.
  • the reset and indication lever 4 has, on its surface, a slot 21 with circular raised portions 22 and 22', in which a portion of the lamina of the moving contact 3 is inserted; the raised portions 22 and 22' an interact alternatively with the lamina as a consequence of a corresponding state of the associated circuit breaker. This interaction helps to keep the reset and indication lever 4 in the inactive position or to turn it respectively in a closed/open state of the associated circuit breaker.
  • said means for coupling to the circuit breaker comprise an additional coupling lever 6 which is pivoted in a point 103 which has a pin 7' for optional coupling to the mechanism of the associated circuit breaker, and a toothed sector 18', which is operatively coupled to the toothed sector 18 of the disengagement lever 12.
  • the two toothed sectors 18 and 18' mesh together, rotating with respect to each other in mutually opposite directions.
  • the reset and indication lever 4 has a shaped projection 30 which, when the circuit breaker opens, protrudes from a corresponding opening 31 formed in the casing 1 and thus allows to provide a local visual indication that the circuit breaker associated therewith is open and that the movable auxiliary contact has correctly moved from one fixed contact 17 to the other.
  • the projection 30, once it has protruded from the casing readily constitutes a button on which an operator can act directly, for example to test the auxiliary functions without having to act on the associated circuit breaker, which thus remains open.
  • the reset and indication lever 4 therefore simultaneously acts as a means for the local visual indication that the circuit breaker is open and that the auxiliary contacts have switched.
  • said projection 30 might be associated with other levers of the kinematic mechanism 100.
  • the contact actuation lever 13, pushed by the spring 14, turns about its own pivoting axis 102, in the direction indicated by the arrow 105, and reaches the position shown in Figure 2.
  • the lamina 3, no longer retained by the projection 25 of the contact actuation lever 13, abuts against the raised portion 22 of the reset and indication lever 4, pushing it downwards.
  • This thrust combined with the action of the spring 5, causes the rotation of the reset and indication lever 4 about its own pivoting axis and the consequent protrusion of the projection 30 from the casing 1; at the same time, the moving contact 3 moves from one fixed contact to the other, as shown in Figure 2.
  • the disengagement lever 12 which receives the corresponding mechanical actuation from the circuit breaker, either directly by means of the pin 7' or indirectly from the coupling lever 6 by means of the pin 7 and the meshing of the two toothed sectors 18 and 18', rotates in the direction indicated by the arrow 106; by this rotation, the disengagement lever 12 disengages the U-shaped element 11, which becomes free to slide in the slot 33 of the contact actuation lever 13; at the end of this actuation, the rotation of the transmission lever 10, which occurs in a manner similar to the one described earlier, returns the U-shaped element 11 into contact with the disengagement lever 12.
  • the device according to the invention allows to provide a local indication that the associated circuit breaker has opened either due to manual intervention of an operator or due to a fault, and that the auxiliary contacts have switched; moreover, an operator can switch the auxiliary contacts again simply by pressing on the projection 30, without acting on the circuit breaker, which remains open ("blank test").
  • the reset and indication lever 4 can perform the important role of test lever, since it allows both to test that the auxiliary contacts of the device actually switch without first coupling it to the circuit breaker and to test some functions of a system after the device has been installed and without having to close the circuit breaker associated therewith, as mentioned before ("blank test").
  • means 50 for locking the moving contact 3 are further associated with the lever 4.
  • said means 50 comprise, in the illustrated embodiment, an eyelet 51 which is formed on the projection 30 and in which it is possible to insert a pin for locking the moving contact 3; in this manner it is possible to perform a "blank test" without requiring action of the operator throughout the test.
  • Another advantageous aspect of the invention consists in that the device thus provided allows to stack a plurality of accessories, arranging them mutually side by side, since the mechanism of the circuit breaker is replicated inside each one, particularly thanks to the transmission lever 10, the disengagement lever 12 and the coupling lever 6; in this manner, the accessory device responds to the device that is located adjacent to it as if it were directly coupled to the circuit breaker itself.
  • the auxiliary contact accessory device fully achieves the intended aim, since it allows to provide a coupling with the circuit breaker in a manner which is independent of the arrangement of the poles inside the circuit breaker and without affecting its performance at all; moreover, by adopting the particular constructive refinements described above, it is possible to directly locally identify any opening of the circuit breaker, with consequent reset of the device, and to perform tests. It should also be observed that all the innovative functions and the inventive aspects of the device can be obtained by using commonly commercially available elements and materials, of extremely low costs.
  • the materials and the dimensions may be any according to requirements and to the state of the art.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Fuses (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP99200905A 1998-03-24 1999-03-24 Dispositif de contacts auxiliaires pour disjoncteur magnéto-thermique Expired - Lifetime EP0949645B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI980605 1998-03-24
IT98MI000605A IT1298784B1 (it) 1998-03-24 1998-03-24 Dispositivo di contatto ausiliario per interruttore magnetotermico

Publications (3)

Publication Number Publication Date
EP0949645A2 true EP0949645A2 (fr) 1999-10-13
EP0949645A3 EP0949645A3 (fr) 2000-04-26
EP0949645B1 EP0949645B1 (fr) 2005-01-19

Family

ID=11379455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99200905A Expired - Lifetime EP0949645B1 (fr) 1998-03-24 1999-03-24 Dispositif de contacts auxiliaires pour disjoncteur magnéto-thermique

Country Status (4)

Country Link
EP (1) EP0949645B1 (fr)
AT (1) ATE287571T1 (fr)
DE (1) DE69923248T2 (fr)
IT (1) IT1298784B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1037243A2 (fr) * 1999-03-12 2000-09-20 ABBPATENT GmbH Interrupteur auxiliaire pour le montage dans un disjoncteur ou interrupteur de fuite à la terre ou leur combinaison

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326446A1 (fr) * 1988-01-28 1989-08-02 Merlin Gerin Commutateur auxiliaire de commande et de signalisation pour disjoncteur multipolaire modulaire
EP0394144A1 (fr) * 1989-04-20 1990-10-24 Merlin Gerin Commutateur auxiliaire à test manuel pour disjoncteur modulaire
FR2647951A1 (fr) * 1989-06-06 1990-12-07 Merlin Gerin Commutateur auxiliaire a dispositif de signalisation locale de declenchement pour disjoncteur modulaire
WO1996028836A1 (fr) * 1995-03-15 1996-09-19 Felten & Guilleaume Austria Ag Commutateur auxiliaire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326446A1 (fr) * 1988-01-28 1989-08-02 Merlin Gerin Commutateur auxiliaire de commande et de signalisation pour disjoncteur multipolaire modulaire
EP0394144A1 (fr) * 1989-04-20 1990-10-24 Merlin Gerin Commutateur auxiliaire à test manuel pour disjoncteur modulaire
FR2647951A1 (fr) * 1989-06-06 1990-12-07 Merlin Gerin Commutateur auxiliaire a dispositif de signalisation locale de declenchement pour disjoncteur modulaire
WO1996028836A1 (fr) * 1995-03-15 1996-09-19 Felten & Guilleaume Austria Ag Commutateur auxiliaire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1037243A2 (fr) * 1999-03-12 2000-09-20 ABBPATENT GmbH Interrupteur auxiliaire pour le montage dans un disjoncteur ou interrupteur de fuite à la terre ou leur combinaison
EP1037243A3 (fr) * 1999-03-12 2002-01-02 ABB PATENT GmbH Interrupteur auxiliaire pour le montage dans un disjoncteur ou interrupteur de fuite à la terre ou leur combinaison

Also Published As

Publication number Publication date
EP0949645A3 (fr) 2000-04-26
DE69923248D1 (de) 2005-02-24
DE69923248T2 (de) 2005-12-08
EP0949645B1 (fr) 2005-01-19
ITMI980605A1 (it) 1999-09-24
ATE287571T1 (de) 2005-02-15
IT1298784B1 (it) 2000-02-02

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