EP0949646B1 - Dispositif annexe pour disjoncteur magnéto-thermique - Google Patents

Dispositif annexe pour disjoncteur magnéto-thermique Download PDF

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Publication number
EP0949646B1
EP0949646B1 EP99200908A EP99200908A EP0949646B1 EP 0949646 B1 EP0949646 B1 EP 0949646B1 EP 99200908 A EP99200908 A EP 99200908A EP 99200908 A EP99200908 A EP 99200908A EP 0949646 B1 EP0949646 B1 EP 0949646B1
Authority
EP
European Patent Office
Prior art keywords
lever
circuit breaker
accessory device
coupling
moving contact
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
EP99200908A
Other languages
German (de)
English (en)
Other versions
EP0949646A3 (fr
EP0949646A2 (fr
Inventor
Elio Jacovino
Claudio Radaelli
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 EP0949646A2 publication Critical patent/EP0949646A2/fr
Publication of EP0949646A3 publication Critical patent/EP0949646A3/fr
Application granted granted Critical
Publication of EP0949646B1 publication Critical patent/EP0949646B1/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
    • H01H71/10—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
    • 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

Definitions

  • the present invention relates to a driven accessory device for indicating the state of 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.
  • magnetothermal circuit breakers are generally constituted by an insulating casing inside which the moving contacts are arranged; said moving contacts 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 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 devices, 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 because of an automatic triggering caused by 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 said device in order to stop the alarm signal without acting on the triggered circuit breaker.
  • an object of the present invention is to provide an accessory device for indicating the state of 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 accessory device for indicating the state of a magnetothermal circuit breaker associated therewith in which it is possible to test said device before coupling to the circuit breaker.
  • Another object is to provide an accessory device for indicating the state of 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 trigger (artificially and/or electrically) the circuit breaker associated therewith.
  • Another object of the present invention is to provide an accessory device for indicating the state of a magnetothermal circuit breaker associated therewith which is highly reliable, relatively easy to manufacture and at competitive costs.
  • an accessory device for indicating the state of a magnetothermal circuit breaker which is associated therewith comprising an insulating casing which contains fixed contacts and a corresponding moving contact and connection terminals, characterized in that it comprises a mechanism for testing the device, and a kinematic mechanism which comprises means for coupling to the circuit breaker, means for actuating the moving contact, means for the local visual indication of a triggered circuit breaker state, said mechanism for testing the device comprising a test lever which is pivotally mounted inside the casing and has a shaped head accommodated in a corresponding opening of the insulating casing so as, once the accessory device is installed, it can be directly actuated by an operator acting on said shaped head from the outside of the casing, and interacts with the moving contact.
  • the accessory device comprises an insulating casing 1 inside which there are fixed contacts 17 which operatively couple to the moving contact 3 (changeover contact); said contacts are connected to connection terminals 60.
  • the 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 actuated as a consequence of 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 a triggered circuit breaker state.
  • said means for actuating the moving contact comprise a contact actuation lever 13, a transmission lever 10 and an engagement lever 8.
  • the transmission lever 10 is pivoted to a point 101 of the casing 1 and is held in a preset position by a spring 15; the engagement lever 8 is further arranged on the same pivoting point 101 and is kept in a preset position by a projection 26 of the transmission lever 10 which abuts against the surface of the engagement lever 8.
  • a spring 9 further acts on said engagement lever 8.
  • 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 disengagement lever 12 and the contact actuation lever 13 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 there is a slot 33 in which the U-shaped element 11 can slide.
  • said end 25 can have a round-shaped profile as shown in Figure 7, or a polygonal-shaped profile as shown in Figures 1-6.
  • the disengagement lever 12 comprises a pin 7 for coupling to the mechanism for actuating the circuit breaker and has the peculiarity that it comprises 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 pin 50 for coupling/uncoupling with respect to the engagement lever 8 and 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' can 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 movement of the kinematic system inside the device has no effect at all on the corresponding movement in the circuit breaker, so that the operating performance of said circuit breaker is not altered in any way.
  • Another important advantage of the accessory device according to the invention consists in that the reset and indication lever 4 has a shaped projection 30 which, when the circuit breaker is triggered, 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 was activated due to a fault (the circuit breaker was triggered).
  • the reset and indication lever 4 therefore simultaneously acts as a means for the local indication that the circuit breaker has been triggered and as a reset for said accessory device.
  • said projection might be associated with other levers of the kinematic mechanism 100.
  • the mechanism of the circuit breaker transmits the movement to the transmission lever 10, which rotates in the direction indicated by the arrow 104, pulling the U-shaped body I 1 and reaching, at the end of its actuation, the position shown in Figure 2.
  • the engagement lever 8, no longer retained by the projection 26 and pushed by the spring 9, rotates about the pivoting axis and engages the pin 50 of the reset and indication lever 4, as shown in Figure 2; in this manner, the reset and indication lever 4 is locked and therefore its projection 30 cannot protrude from the casing 1.
  • 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; any further movement of the lamina is prevented by the locking action applied by the engagement lever 8 to the pin 50 of the reset and indication lever 4.
  • the rotation of the transmission lever 10, with the consequent separation of the projection 25 from the surface of the engagement lever 8, occurs in a manner similar to the one described earlier, but with a delay which allows the reset and indication lever 4 to rotate about its own pivoting axis, avoiding the locking of the engagement lever 8 on the pin 50; this rotation occurs by way of the action of the spring 5 and of the lamina of the moving contact 3 which, disengaged from the projection 25, abuts against the raised portion 22, pushing it downwards.
  • the shaped projection 30 of the reset and indication lever 4 protrudes from the casing 1 through the opening 31, providing a local visual indication that the circuit breaker has been triggered. An operator can then reset the accessory device simply by acting on the projection 30, without acting on the circuit breaker, which remains open.
  • the accessory device further comprises a mechanism for testing the device itself; in particular, said mechanism for testing the device comprises an additional test lever 2 which is pivoted in a point 107 of the casing 1 and is operatively disconnected from the above described kinematic mechanism.
  • Said test lever 2 as shown in particular in Figure 7, has an arc-shaped profile 40, a tip portion of which ends with a head 43 which has a circular shape and can interact directly with the lamina of the moving contact 3.
  • the actuation of the test lever 2 can be performed directly by an operator who, by acting on a shaped head 41 (which constitutes a test button) accommodated in an opening 42 formed in the casing 1, causes the test lever 2 to rotate downwards; the head 43 interacts with the lamina of the contact 3 and forces it to perform a consequent movement from one fixed contact to the other; the test lever 2 is reset simply by way of the elastic return action of the lamina, which returns to the initial situation once the action of the operator on the shaped head 41 has ended.
  • a shaped head 41 which constitutes a test button
  • test lever 2 can perform the important function of test lever, since it allows both to check that the contacts of the device actually switch without first coupling it to the circuit breaker and to test some functions of a system once the device has been installed and without the need to close the circuit breaker associated therewith.
  • Another advantageous aspect of the invention is the fact 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 by virtue of 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 accessory device for indicating the state of a magnetothermal circuit breaker, particularly of the bipolar type with phase and neutral poles, associated therewith 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 triggering of the circuit breaker, with consequent reset of the device, and to perform tests.
  • the materials and the dimensions may be any according to requirements and to the state of the art.

Landscapes

  • Breakers (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (13)

  1. Dispositif annexe destiné à indiquer l'état d'un disjoncteur magnéto-thermique qui y est associé, le dispositif annexe comprenant un boítier (1) d'isolation qui contient des contacts (17) fixes, un contact (3) mobile correspondant, des bornes (60) de raccordement, et un mécanisme (100) cinématique qui comprend un moyen (6, 7, 12, 7') de raccordement au disjoncteur, un moyen (13, 10, 8) d'actionnement du contact mobile, un moyen (30, 31) pour l'indication visuelle locale d'un état déclenché du disjoncteur et un mécanisme de test du dispositif dudit mécanisme destiné à tester le dispositif comprenant un levier (2) de test qui est monté avec faculté de pivotement à l'intérieur du boítier (1), caractérisé en ce que le levier de test possède une tête (41) profilée placée dans une ouverture (42) correspondante du boítier (1) d'isolation afin, une fois que le dispositif annexe est installé, qu'il puisse être directement actionné par un opérateur qui agit sur ladite tête (41) profilée depuis l'extérieur du boítier (1) et interagit avec le contact (3) mobile.
  2. Dispositif annexe selon la revendication 1, caractérisé en ce que ledit levier (2) de test comprend un profil (40) identique à un arc dont une partie d'extrémité se termine par une tête (43) circulaire qui interagit avec le contact (3) mobile.
  3. Dispositif annexe selon la revendication 1, caractérisé en ce que ledit moyen de raccordement au disjoncteur comprend un premier levier (6) de raccordement et un second levier (12) de désaccouplement qui sont connectés entre eux en fonctionnement, ledit premier levier (6) et ledit second levier (12) comprenant chacun une tige (7', 7) pour un raccordement au disjoncteur.
  4. Dispositif annexe selon la revendication 3, caractérisé en ce que les leviers de raccordement et de désaccouplement (6, 12) sont connectés en fonctionnement entre eux à l'aide de deux secteurs (18', 18) dentés qui sont respectivement associés au levier (6) de raccordement et au levier (12) de désaccouplement et qui s'engrainent mutuellement, effectuant une rotation l'un par rapport à l'autre dans des directions opposées.
  5. Dispositif annexe selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que ledit moyen d'actionnement du contact (3) mobile comprend un levier (13) de commande et de contact, un levier (10) de transmission, et un levier (4) de réenclenchement et d'indication, un ressort (14, 5, 15) étant associé à chacun desdits leviers (13, 4, 10).
  6. Dispositif annexe selon la revendication 5, caractérisé en ce que le levier (10) de transmission est raccordé, à l'aide d'un élément (11) en forme de U, au levier (13) de commande de contact et au levier (12) de désaccouplement.
  7. Dispositif annexe selon la revendication 6, caractérisé en ce que le levier (13) de commande de contact possède une fente (33) dans laquelle l'élément (11) en forme de U coulisse.
  8. Dispositif annexe selon la revendication 6, caractérisé en ce que le levier (13) de commande et de contact comprend une saillie (25) qui peut directement interagir avec le contact (3) mobile et une saillie qui peut interagir avec un levier (8) d'accouplement.
  9. Dispositif annexe selon la revendication 8, caractérisé en ce que le levier (4) de réenclenchement et d'indication comprend une tige (50) pour le raccordement au levier (8) d'accouplement en fonction d'un état ouvert du disjoncteur.
  10. Dispositif annexe selon la revendication 9, caractérisé en ce que ledit levier (4) de réenclenchement et d'indication comprend une fente (21) avec des parties relevées circulaires (22, 22') dans lesquelles au moins une partie du contact (3) mobile est insérée, lesdites parties relevées (22, 22) étant capables d'interagir alternativement avec le contact (3) mobile.
  11. Dispositif annexe selon une ou plusieurs des revendications précédentes, caractérisé en ce que ledit moyen destiné à fournir une indication visuelle locale d'un état déclenché du disjoncteur est constitué par une saillie d'au moins un parmi les leviers qui font partie du mécanisme cinématique, ladite saillie étant capable de s'avancer hors du boítier (1) suite à un déclenchement du disjoncteur.
  12. Dispositif annexe selon la revendication 11, caractérisé en ce que ladite saillie est constituée par une extrémité (30) du levier (4) de réenclenchement et d'indication, avec en correspondance sur le boítier (1) une ouverture (31).
  13. Dispositif annexe selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que lesdits leviers (10, 6, 12) de transmission, de raccordement et de désaccouplement permettent un raccordement à un autre dispositif annexe.
EP99200908A 1998-03-24 1999-03-24 Dispositif annexe pour disjoncteur magnéto-thermique Expired - Lifetime EP0949646B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI980606 1998-03-24
IT98MI000606A IT1298785B1 (it) 1998-03-24 1998-03-24 Dispositivo di segnalazione per interruttore magnetotermico

Publications (3)

Publication Number Publication Date
EP0949646A2 EP0949646A2 (fr) 1999-10-13
EP0949646A3 EP0949646A3 (fr) 2000-04-26
EP0949646B1 true EP0949646B1 (fr) 2005-01-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99200908A Expired - Lifetime EP0949646B1 (fr) 1998-03-24 1999-03-24 Dispositif annexe pour disjoncteur magnéto-thermique

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EP (1) EP0949646B1 (fr)
AT (1) ATE288128T1 (fr)
DE (1) DE69923363T2 (fr)
IT (1) IT1298785B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104630639B (zh) * 2015-03-10 2016-11-30 中南大学 一种纳米氮化钇弥散强化铁基合金及制备方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216439B4 (de) * 2002-04-12 2011-02-24 Abb Ag Hilfsschalter
CN101329955B (zh) * 2007-06-22 2011-07-06 西门子公司 双操作手柄装置
DE102014001997B4 (de) 2014-02-17 2020-01-09 Abb Ag Hilfsschalter mit Test-Taste
CN106876220B (zh) * 2015-12-14 2020-02-18 浙江正泰电器股份有限公司 断路器的热过载报警不脱扣装置
CN107154327A (zh) * 2017-05-24 2017-09-12 常熟瑞特电气股份有限公司 用于断路器的过载脱扣器、热磁式脱扣装置和断路器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626714B1 (fr) * 1988-01-28 1990-06-01 Merlin Gerin Commutateur auxiliaire de commande et de signalisation pour disjoncteur multipolaire modulaire
FR2646282B1 (fr) * 1989-04-20 1996-03-22 Merlin Gerin Commutateur auxiliaire a test manuel pour disjoncteur modulaire
FR2647951B1 (fr) * 1989-06-06 1993-02-12 Merlin Gerin Commutateur auxiliaire a dispositif de signalisation locale de declenchement pour disjoncteur modulaire
AT402582B (de) * 1995-03-15 1997-06-25 Felten & Guilleaume Ag Oester Zusatzschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104630639B (zh) * 2015-03-10 2016-11-30 中南大学 一种纳米氮化钇弥散强化铁基合金及制备方法

Also Published As

Publication number Publication date
DE69923363T2 (de) 2006-03-23
EP0949646A3 (fr) 2000-04-26
ITMI980606A1 (it) 1999-09-24
IT1298785B1 (it) 2000-02-02
ATE288128T1 (de) 2005-02-15
EP0949646A2 (fr) 1999-10-13
DE69923363D1 (de) 2005-03-03

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