EP0399282B1 - Automatischer magneto-thermischer Schutzschalter mit hoher Ausschaltleistung - Google Patents

Automatischer magneto-thermischer Schutzschalter mit hoher Ausschaltleistung Download PDF

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Publication number
EP0399282B1
EP0399282B1 EP90108624A EP90108624A EP0399282B1 EP 0399282 B1 EP0399282 B1 EP 0399282B1 EP 90108624 A EP90108624 A EP 90108624A EP 90108624 A EP90108624 A EP 90108624A EP 0399282 B1 EP0399282 B1 EP 0399282B1
Authority
EP
European Patent Office
Prior art keywords
switch
drum
side portion
moving
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
EP90108624A
Other languages
English (en)
French (fr)
Other versions
EP0399282A2 (de
EP0399282A3 (de
Inventor
Fabrizio Fabrizi
Sergio Pianezzola
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.)
BTicino SpA
Original Assignee
BTicino 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 BTicino SpA filed Critical BTicino SpA
Publication of EP0399282A2 publication Critical patent/EP0399282A2/de
Publication of EP0399282A3 publication Critical patent/EP0399282A3/de
Application granted granted Critical
Publication of EP0399282B1 publication Critical patent/EP0399282B1/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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • 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
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor
    • 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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures

Definitions

  • This invention relates to an automatic magneto-thermal protection switch according to the preamble of claim 1 and known from document DE-B-2 132 738.
  • the switch When conformant with this standard, the switch will be able to adequately protect resistive loads as are usually to occur in generic domestic and civil systems.
  • a current demand is also that of providing modular switches of still smaller size and bulk so that an increased number of them can be accommodated within a station panel. This demand is more acutely felt where the protection for existing systems is to be enhanced and the space available for the station panel is limited.
  • the technical problem that underlies this invention is to provide an automatic magneto-thermal protection switch which has such structural and functional characteristics as to permit of the use of uniquely small-size de-ionization chambers, so that the switch can comfortably fit inside a single standard module, and still retain a high breaking capacity, while overcoming the drawbacks with which the prior art is beset.
  • the solutive idea on which this invention stands is that of increasing the opening and separation speed of the moving contact relatively to the fixed contact, upon automatic operation of the switch, thereby the size of the de-ionization cells can be reduced.
  • an automatic magneto-thermal protection switch or breaker according to the invention.
  • the switch 1 comprises a box-type case 2 of parallelepipedic shape, known per se, which measures 17.5 mm in width.
  • the case 2 is formed of two superimposed half-shells 4 and 5 having mating shapes.
  • the switch 1 also comprises a control key 3, of the bistable kind, which is accessible frontally on the case 2 and journalled on a pin 6 fast with the half-shell 5.
  • a break mechanism Connected to the key 3 is a break mechanism, generally denoted by 15, comprising a toggle mechanism 16 for driving a moving contact to rock toward and away from a corresponding fixed contact.
  • the switch 1 is of the so-called single-pole type with neutral, and input and output fixed-cage terminals 7 and 8 are provided therefor to enable connection to neutral and phase conductors, respectively.
  • phase input terminal 8 To the phase input terminal 8, there is connected one end of an amperometric coil 9 intended for automatic magnetic protection operation and wound around a stationary core 10.
  • the coil 9 is carried in a U-shaped cage 11 having sheet-like walls and, pivoted to its top, a small moving armature 12 bent at right angles to define a first leg extending over the core 10 and a second leg 12a having an end arranged to interfere with and act upon, with the interposition of a small lever 46, the breaking mechanism 15.
  • the end of the first leg of the armature 12 has a breaker arm-like lug 35 serving a function to be explained.
  • the armature 12 is apt to be pulled toward the core 10 by the electromagnetic force induced by a fault or short current such that the end active on the mechanism 15 can automatically trip off the switch 1 on the occurrence of a fault situation.
  • Respectively associated with the neutral input terminal 7 and the phase output terminal 8 are fixed contacts 14 and 18, toward and away from which, corresponding moving contacts 17 and 19 are guided movably by the mechanism 15.
  • a moving contact holder assembly 20 is provided for the purpose which comprises a drum 21 journalled on a pin 22 fast with the half-shell 5.
  • the drum 21 is connected peripherally to one end of the toggle mechanism 16 and displaceable angularly against the bias force of a spring means 24.
  • each contact, 17 or 19 comprises an annular sheet-like portion 25 fitting around the pin 22 in a mating seat 26 formed in the drum 21 and being held therein against the bias of a spring 27.
  • an arm 28 Formed integrally with the portion 25 is an arm 28 carrying the moving contact and jutting out toward the corresponding fixed contact opposite to a de-ionization chamber 30 and respective cell 29.
  • the cells 29 are provided on opposed sides of the switch 1 near the fixed contacts 14 and 18; they are arranged substantially along a slightly inclined direction to the major axis of the switch.
  • Each cell 29 consists of a set of laminations 36 thickly arranged parallel and attached to one another by small opposed cross-bars 37. These laminations 36 have a V-shaped cutout 38 formed in their side facing the moving contact, whereby a corresponding V-like notch is defined which provides an invitation for the electric arc to be suppressed.
  • the spring 27 controls the contact force between the corresponding fixed and moving contacts, while taking up any backlash generated by the contact wear.
  • the respective arms 28 of the contacts 17 and 19 extend substantially from opposed ends of the drum 21, and are aligned along the same direction but opposite verses. They are displaceable angularly together with the drum 21 in the same direction of rotation.
  • a cord lead 43 connects the portion 25 of the moving contact 17 to the output terminal 7, and a similar cord lead 44 connects the portion 25 of the other moving contact 19 to the end of a bimetallic plate 45.
  • This plate 45 has the opposite end connected to the other end of the coil 9, being thus connected in series between that coil and the moving contact 19 to provide thermal protection for the switch 1.
  • a small, three-arm lever 46 is journalled for the purpose on a pin 48 rigid with the half-shell 5 and displaceable angularly against the bias force of a spring 47. That lever 46 has a first arm acting as feeler on the bimetallic plate 45, a second arm inserted in the path of travel of the section 12a of the armature 12, and a third arm connected detachably to the breaking mechanism 15.
  • a rocking striker 32 is also provided which is journalled on the pin 22 above the drum 21 and has opposite ends 31 and 33 respectively located close against each arm 28, thereby the rocking striker 32 will form with the arms 28 a cross-over X-shaped configuration.
  • the rocking striker 32 has its end 33 inserted in the path of travel of the breaker arm-like lug 35 on said armature 12 and the opposite end 31 active on the arm 28 of the moving contact 19 in abutment relationship.
  • That same end 33 of the rocking striker 32 is active, on account of the thrust force applied to it by the lug 35 on operation of the coil 9, on the arm 28 of the moving contact 17.
  • the switch 1 is also provided with an indicator device 40 indicating the operational state of the switch.
  • This device comprises a rod 39 pivoted between the drum 20 and the toggle mechanism 16 and extending to the key 3.
  • a small indicator plate 42 in two colors which can be viewed through a window 41 provided in the case 2 front above the key 3.
  • the striking effect adds to the elastic pull from the spring 24, with the result that the speed of relative movement of the fixed and moving contacts away from each other can be higher than that afforded by switches made in accordance with the prior art.

Claims (3)

  1. Ein automatischer magnetothermischer Schutzschalter (1) mit einer hohen Unterbrechungsschaltleistung und von einer Art, die eine Steuerungstaste (3), einen Kniehebelmechanismus (16), der der Taste zugeordnet ist, zumindest einen beweglichen Kontakt (19), der auf einem Arm (28) getragen ist, der durch den Mechanismus betrieben wird, um in Richtung eines festen Kontakts (18), der einer Deionisationskammer (30) und einer jeweiligen Zelle (29) gegenüberliegt, und von diesem weggeschwenkt zu werden, einem Strommeßschutzsolenoid (9), dessen beweglicher Läufer (12) angeordnet ist, um auf den Mechanismus einzuwirken, einen schwenkbaren Anschlag (32), der einen Seitenabschnitt im dem Bewegungsweg einer Nase (35) auf dem Läufer und der einen anderen Seitenabschnitt aufweist, der angeordnet ist, um an den beweglichen Kontaktarm (28) anzuliegen, umfaßt, um dadurch die Kontaktöffnungsbewegung durch die Zeit des automatischen Betriebes zu beschleunigen,
    dadurch gekennzeichnet, daß
    er ein Paar von beweglichen Kontakten (17, 19) in einer einpoligen Konfiguration mit einem neutralen Pol umfaßt, die auf einer Kontakthalteranordnung (20) befestigt sind, die aus einer Trommel (21) besteht, die auf einem Stift (22) gelagert ist und peripher mit einem Ende des Kniehebelmechanismus (16) verbunden ist, besteht, wobei die Tragearme (28) der beweglichen Kontakte (17, 19) von diametral gegenüberliegenden Seiten der Trommel (20) hervorstehen, und
    daß der schwenkbare Anschlag (32) gebildet und angeordnet ist, um sich um den Stift (22) zu drehen, und zwei entgegengesetzte Enden (31, 33) aufweist, die um die Trommel (21) bewegbar sind und jeweils nahe an den jeweiligen Enden der beweglichen Kontaktarme (28) angeordnet sind, wobei ein Seitenabschnitt ein Seitenabschnitt eines der entgegengesetzten Enden (31, 33) ist, und der andere Seitenabschnitt ein Seitenabschnitt jedes der entgegengesetzten Enden (31, 33) ist.
  2. Ein Schalter gemäß Anspruch 1, dadurch gekennzeichnet,
    daß jeder bewegliche Kontakt (17, 19) einen plattenartigen kreisförmigen Abschnitt (25), der um den Stift (22) in einem Gegenlager (26), das in einer Fläche der Trommel (21) gebildet ist, angepaßt ist und darin durch eine Feder (27) gehalten ist, und einen Armabschnitt (28), der einstückig mit dem kreisförmigen Abschnitt gebildet ist und den entsprechenden beweglichen Kontakt trägt, einschließt.
  3. Ein Schalter gemäß Anspruch 1 oder 2, dadurch gekennzeichnet,
    daß er ein Anzeigergerät (40) umfaßt, um den Betriebszustand des Schalters anzuzeigen, und der mit einer Stange (39) versehen ist, die zwischen der Trommel (20) und dem Kniehebelmechanismus (16) gelagert ist und sich zu der Taste (3) erstreckt, wobei an dem Ende der Stange eine kleine Anzeigerplatte (42) in zwei Farben befestigt ist, die durch ein Fenster (41) gesehen werden kann, das an der Vorderseite des Schaltergehäuses vorgesehen ist.
EP90108624A 1989-05-25 1990-05-08 Automatischer magneto-thermischer Schutzschalter mit hoher Ausschaltleistung Expired - Lifetime EP0399282B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8920642A IT1230203B (it) 1989-05-25 1989-05-25 Interruttore automatico di protezione magnetotermica ad elevato potere di interruzione.
IT2064289 1989-05-25

Publications (3)

Publication Number Publication Date
EP0399282A2 EP0399282A2 (de) 1990-11-28
EP0399282A3 EP0399282A3 (de) 1992-01-22
EP0399282B1 true EP0399282B1 (de) 1995-08-30

Family

ID=11169954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108624A Expired - Lifetime EP0399282B1 (de) 1989-05-25 1990-05-08 Automatischer magneto-thermischer Schutzschalter mit hoher Ausschaltleistung

Country Status (4)

Country Link
EP (1) EP0399282B1 (de)
DE (1) DE69021931T2 (de)
ES (1) ES2078919T3 (de)
IT (1) IT1230203B (de)

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US6087913A (en) 1998-11-20 2000-07-11 General Electric Company Circuit breaker mechanism for a rotary contact system
US6114641A (en) 1998-05-29 2000-09-05 General Electric Company Rotary contact assembly for high ampere-rated circuit breakers
US6166344A (en) 1999-03-23 2000-12-26 General Electric Company Circuit breaker handle block
US6172584B1 (en) 1999-12-20 2001-01-09 General Electric Company Circuit breaker accessory reset system
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US6188036B1 (en) 1999-08-03 2001-02-13 General Electric Company Bottom vented circuit breaker capable of top down assembly onto equipment
US6204743B1 (en) 2000-02-29 2001-03-20 General Electric Company Dual connector strap for a rotary contact circuit breaker
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Also Published As

Publication number Publication date
IT1230203B (it) 1991-10-18
DE69021931T2 (de) 1996-04-25
IT8920642A0 (it) 1989-05-25
DE69021931D1 (de) 1995-10-05
EP0399282A2 (de) 1990-11-28
ES2078919T3 (es) 1996-01-01
EP0399282A3 (de) 1992-01-22

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