EP0140761B1 - Antriebsmechanismus für einen mehrpoligen Niederspannungs-Schutzschalter - Google Patents

Antriebsmechanismus für einen mehrpoligen Niederspannungs-Schutzschalter Download PDF

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Publication number
EP0140761B1
EP0140761B1 EP84401961A EP84401961A EP0140761B1 EP 0140761 B1 EP0140761 B1 EP 0140761B1 EP 84401961 A EP84401961 A EP 84401961A EP 84401961 A EP84401961 A EP 84401961A EP 0140761 B1 EP0140761 B1 EP 0140761B1
Authority
EP
European Patent Office
Prior art keywords
handle
lever
trip
bar
operating mechanism
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
Application number
EP84401961A
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English (en)
French (fr)
Other versions
EP0140761A3 (en
EP0140761A2 (de
Inventor
Pierre Batteux
Robert Denis
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT84401961T priority Critical patent/ATE29620T1/de
Publication of EP0140761A2 publication Critical patent/EP0140761A2/de
Publication of EP0140761A3 publication Critical patent/EP0140761A3/fr
Application granted granted Critical
Publication of EP0140761B1 publication Critical patent/EP0140761B1/de
Expired 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
    • 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
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/503—Means for increasing the opening stroke of the contacts
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/521—Details concerning the lever handle
    • 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

Definitions

  • the invention relates to a control mechanism of a multipole circuit breaker with molded insulating housing, according to the preamble of claim 1.
  • the handle is supported by a metal cradle or bracket in the shape of an inverted U, pivotally mounted on a fixed axis subject to the plates of the mechanism.
  • the trajectory of the joystick has a small pivot radius due to the presence of the material axis of the cradle inside the housing.
  • the switching bar and / or the trigger bar are generally arranged outside the trajectory of the lever.
  • Document US-A-2 806 103 relates to a single-pole circuit breaker with molded insulating housing, formed by the assembly of a base and a cover.
  • the lever of the mechanism comprises an internal base laterally equipped with two guide pins, capable of sliding in conjugate notches, formed in the base and the cover of the housing.
  • the curved shape of the housing notches determines the pivot radius of the handle when it moves between the open and closed positions.
  • Such a mechanism is perfectly suitable for a low-caliber single-pole circuit breaker with a non-removable housing, but is not suitable for a multi-pole circuit breaker whose single removable housing contains different compartments juxtaposed for housing the poles.
  • the object of the invention is to provide a control mechanism for a multipole circuit breaker, housed in the compact insulating housing having no influence on the movement of the handle and allowing a reduction in the friction of the moving parts of the mobile equipment.
  • the support member of the base of the lever comprises a guide ramp secured to each plate of the mechanism, said ramp having a profile, either curvilinear or inclined in the case of a pivoting movement of the lever with pivoting axis fictitious, or rectilinear parallel to the bottom of the case in the case of a sliding movement of the lever.
  • rolling members can be interposed between the underside of the base and the plates to minimize the friction forces generated during movement of the lever on the corresponding ramps.
  • the ramps can be shaped on the upper edges of the plates, each rolling member being formed by a roller having an axial length slightly greater than the transverse spacing formed between the plates.
  • the absence of an additional articulated support part for the lever makes it possible to minimize the friction of the movable members of the mechanism.
  • the fictitious axis of rotation of the lever can be located outside the housing, which makes it possible to increase the pivoting radius of the lever. This radius is perfectly defined by the dimensional characteristics of the ramps. It follows that the opposite ends of the base of the lever respectively cover the switching rod and the trip bar when the lever is in the extreme positions of the pivoting stroke. The size of the circuit breaker box is thus reduced to a minimum.
  • the pivot pin of the toggle rests on a cam of the release lever. This results in a variation of the opening stroke of the contact arms due to a different rotation of the bar occurring during manual opening or during opening by automatic triggering.
  • the stroke of the contact arms is greater in the event of a trip.
  • this variation of the opening stroke is used to actuate, by means of the bar, the various electrical auxiliaries arranged on either side of the mechanism.
  • a low-voltage three-pole circuit breaker comprises a box 10, parallelepipedal in molded insulating material containing an operating mechanism, designated by the general reference 12.
  • the three poles are housed in juxtaposed compartments located in the lower part of the housing 10 and the mechanism 12 is arranged above the central pole in the upper part of the housing 10.
  • Each pole includes a pair of separable contacts 14, 16, an arc extinguishing chamber 18 and a thermomagnetic trip device 20.
  • the fixed contact 14 is carried by an end conductor 22 extended externally by a first contact pad 24 making projection from the side face 25 of the housing 10.
  • the movable contact 16 is arranged at the end of a vertical contact arm 26 secured by a spring 27 to a switching bar 28 common to the three poles.
  • the insulating bar 28 for supporting the contact arms 26 is mounted with limited rotation between the open and closed positions of the circuit breaker and extends transversely above the poles in the upper part of the housing 10 in a direction perpendicular to the arms 26 mobile contacts.
  • the arc extinguishing chamber 18 is constituted by a stack of metal separators or deionization sheets 30 extending perpendicular to the bottom 32 of the housing 10.
  • the second contact pad 34 of each pole leaves the opposite side face 36 of the housing 10, and is electrically connected to the thermomagnetic trip device 20, the latter being arranged between the arc extinguishing chamber 18 and the side face 36.
  • the electrical connection of the contact arm 26 with the second contact pad 34 is effected by means of a flexible conductor formed by a braid 38, surrounded by an insulating sheath, not shown.
  • the insulation of the braid 38 constitutes a functional insulation of the mechanism 12 with respect to the active parts of each pole.
  • the mechanism 12 is mounted above the central pole, between two spaced plates 40, 42 extending parallel in the longitudinal direction of alignment of the contact pads 24, 34.
  • the switching bar 28 is actuated by means of a knee lever 44 comprising a lower link 46 and an upper link 48 articulated on a pivot axis 50.
  • the knee switch 44 cooperates on the one hand with a lever 52 for manual control projecting from an opening 53 of the cover 54, and d on the other hand with an automatic hook or trigger lever 56 pivotally mounted on a pivot 58.
  • the lower link 46 is mechanically coupled to the switching bar 28 and the upper link 48 is articulated on an axis 60 of the trigger lever 56.
  • the mechanical connection between the toggle joint 44 and the lever 52 takes place in an elastic manner by means of a tension spring 62, one of the ends of which is anchored to the pivot axis 50 of the knee llère 44 and the other end of which is attached to a lug secured to the lever 52.
  • the trigger lever 56 comprises a hooking nose 64 cooperating in the armed position with a lock 66 of a trigger bar 68 made of insulating material, common to the three poles.
  • the trigger bar 68 extends above the magnetothermal trigger 20 of each pole in a direction parallel to the switching bar 28, and is mounted with limited rotation between an armed position for locking the hooking nose 64 of the lever 56 by the lock 66 and a triggered position releasing the lever 56 by unlocking the lock 66.
  • the passage from the armed position to the triggered position of the rotary bar 68 operates clockwise and is controlled either by the magnetothermal trigger 20 in the presence an overload or short-circuit current, either by an auxiliary trip device, in particular an undervoltage relay so as to cause the automatic triggering of the mechanism 12 and the opening of the contacts 14, 16 of the three poles by rotation of the bar switch 28 counterclockwise.
  • the latch 66 of the trigger bar 68 is biased in the armed position by a return spring (not shown).
  • the lever 52 is provided with an elongated base 70 located inside the housing 10 between the mechanism 12 and the cover 54.
  • the curved underside 72 of the base 70 is supported on a fixed guide member 73 formed by the upper edges of the two plates 40, 42 of the mechanism 12 with the interposition of two rollers 74, 76 (see fig. 4 and 5).
  • Each plate 40, 42 is equipped with two curved or inclined ramps 78, 80 on which the rollers 74, 76 roll during the movement of the lever 52.
  • the dimensional characteristics of the ramps 78, 80 allow. attempt to determine with precision the radius of the stroke and the pivot point M of the lever 52, the point M being the trace of a fictitious axis of rotation located in FIG.
  • the non-material point M of pivoting of the lever 52 may be outside the housing 10, which makes it possible to minimize the height of the housing 10 between the bottom 32 and the cover 54.
  • the ramps 78, 80 of the upper edges of the plates 40, 42 are rectilinear, extending parallel to the bottom 32 of the housing.
  • the base 70 is also rectilinear and cooperates with the ramps to impose a translation movement limited to the handle 52 during its travel between the open and closed positions.
  • the lower link 46 of the toggle joint 44 of the mechanism 12 is formed by a rectangular open loop of steel wire of circular section.
  • the ends 88 of the open branch 90 of the loop are engaged in an opening 92 of the switching bar 28.
  • the opposite branch 94 of the lower link 46 is positioned in a semi-open notch 96 formed in a U-shaped stirrup 98 constituting the upper link 48.
  • the spring 62 for triggering the mechanism 12 is hooked between the branch 94 and the lever 52 and maintains the branch 94 at the bottom of the notch 96, so as to form the pivot axis 50 of the toggle joint 44.
  • FIGS 8 and 9 show another embodiment of the toggle 44 in which each link 46, 48 is shaped into a U from a steel wire of circular section.
  • One of the 100 lateral branches of the lower link 46 is held by the tension spring 62 in a crescentally deformed part 102 of the upper link 48.
  • the pivot axis 50 of the toggle joint 44 moves along a cam 104 of the curved lower edge of the trigger lever 56, said edge being arranged between the pivot 58 and the hooking nose 64 opposite the axis 60 of articulation of the upper link 48.
  • the cam 104 of the lever 56 is delimited by two notches 106, 108 serving as stops for the axis 50 of the toggle joint 44 when the contacts 14, 16 of the poles are respectively in the position of closing and opening.
  • the trigger lever 56 In the closed position F (FIG. 1), the trigger lever 56 is locked in the armed position by the lock 66, and the axis 50 of the toggle joint 44 is positioned in the first notch 106 of the cam 104.
  • the circuit breaker is reset by manual movement of the handle 52 clockwise from the O / D position to the R position of the reset close to the 0 position so as to ensure that the trip lever is hooked 56 to the lock 66.
  • the closing of the contacts of the circuit breaker (FIG. 1) then takes place by a reverse rotation of the handle 52 actuated manually towards the position F.
  • the control auxiliaries are formed by auxiliary triggers, in particular of the voltmetric type with undervoltage MN and / or with current emission MX intended to cause the unlocking of the lock 66 to trigger the. mechanism 12 following the absence of tension on the network or to a remote control opening the circuit breaker.
  • the variation of the opening stroke of the contact arms 26 intervening by a different rotation of the bar 28, according to the type of manual or automatic control on fault, is advantageously used to actuate the various electrical auxiliaries.
  • the switching bar 28 for this purpose comprises a projection 110 ( Figures 10 and 11) or boss arranged in the vicinity of each auxiliary.
  • the projection 110 of the bar 28 cooperates in the O / D position of the lever 52 with a transmission lever 112 intended to actuate the reversing contact 114 of the second system of contacts SD for remote signaling of a trip on fault. .
  • the projection 110 associated with the first auxiliary contact system OF would actuate the corresponding change-over contact 114 if the lever 52 was in the manual opening 0 position.
  • the change-over contact 114 of the first OF system is therefore controlled prior to that of the second SD system because of the different opening travel of the bar 28 in the direction of the arrow f.
  • an auxiliary release MN or MX comprises an angled control lever 116 pivotally mounted on an axis 118. One end of the control lever 116 cooperates with a protrusion 120 of the trigger bar 68, and the The opposite end is in contact with the lever. transmission 112.
  • the control lever 116 pivots clockwise and drives the bar 68 towards the triggered position.
  • the lever 52 arrives in the intermediate O / D position, the projection 110 of the bar 28 actuates the levers 112, 116 in the direction of the arrows f to ensure automatic resetting of the auxiliary release MN or MX. This automatic rearming by the bar 28 is impossible in position 0 of the lever 52.

Landscapes

  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Circuit Breakers (AREA)
  • Control Of Eletrric Generators (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Electronic Switches (AREA)
  • Switches With Compound Operations (AREA)

Claims (8)

1. Antriebsmechanismus fuer einen mehrpoligen Schutzschalter mit einem Isoliergehaeuse (10) mit Boden (32) und Deckel (54), wobei der genannte Mechanismus (12) zwischen zwei parallelen Platten (40, 42) montiert ist und aufweist :
einen Handbetaetigungshebel (52) des Mechanismus (12) mit einem laenglichen, im Innern des Gehaeuses (10) angeordneten Sockel (70) eines Tragelementes, um die Laufbahn des Hebels (52) zu bestimmen,
eine mit einem automatischen Ausloesehebel (56) und mit einem fuer alle Pole gemeinsamen Schaltstab (28) verbundene Kniegelenk-Vorrichtung (44),
eine zwischen dem Hebel (52) und der Achse (50) des Kniegelenkes (44) angeordnete Energiespeicherungs-Feder (62),
ein Verriegelungsorgan (66) des Ausloesehebels (56) in gespannter Lage,
eine Ausloesestange (68), die eine Ruhestellung oder eine ausgeloeste Stellung einnehmen kann, um die Verriegelung bzw. die Entriegelung des Ausloesehebels (56) zu gewaehrleisten,
Ausloesemittel, die beim Auftreten eines Fehlers oder eines von aussen kommenden Befehls mit der Ausloesestange (68) zusammenarbeiten, dadurch gekennzeichnet, dass das Tragelement des Sockels (70) des Hebels (52) eine Fuehrungsrampe (78, 80) aufweist, die mit jeder Platte (40, 42) des Mechanismus (12) verbunden ist, wobei die genannte Rampe ein Profil aufweist, welches entweder im Fall einer Drehbewegung des Hebels (52) mit fiktiver Drehachse krummlinig oder schraeggestellt ist, oder im Falle einer Gleitbewegung des Hebels (52) geradlinig und parallel zum Boden (32) des Gehaeuses (10) ist.
2. Antriebsmechanismus gemaess Anspruch 1, dadurch gekennzeichnet, dass Rollenelemente (74, 76) zwischen der unteren Flaeche (72) des Sockels (70) und den Rampen (78, 80) der Platten (40, 42) eingefuegt sind, um die beim Bewegen des Hebels (52) auftretenden Reibungskraefte zu verringern.
3. Antriebsmechanismus gemaess Anspruch 2, dadurch gekennzeichnet, dass die Rampen (78, 80) auf den oberen Schmalseiten der Platten (40, 42) ausgebildet sind, wobei jedes Rollenelement (74, 76) von einer Rolle gebildet wird, die eine Axiallaenge besitzt, die etwas groesser ist als der zwischen den Platten (40, 42) vorgesehene transversale Abstand.
4. Antriebsmechanismus gemaess einem der Ansprueche 1 bis 3, wobei eine Kniegelenk-Vorrichtung (44) eine untere mit dem Stab (28) gekuppelte Hebelstange (46) und eine obere mit dem automatischen Ausloesehebel (56) beweglich verbundene Hebelstange (48) aufweist, dadurch gekennzeichnet, dass die untere Hebelstange (46) einen Stahldrahtstrang (94, 100) mit rundem Querschnitt aufweist, der in einer konjugierten Lagerung (96, 102) der oberen Hebelstange (48) eingefuegt ist, um die Gelenkachse (50) des Kniegelenkes (44) zu bilden, wobei der genannte Drahtstrang (94.100) auf dem Boden der Lagerung (96, 102) durch die Ausloesefeder (68) festgehalten wird, welche zwischen dem Hebel (52) und dem genannten Drahtstrang (94, 100) verankert ist.
5. Antriebsmechanismus gemaess einem der Ansprueche 1 bis 4, der ausserdem enthaelt :
einen Ausloeser, der mit der Stange (68) bei Fehlerauftritt zusammenarbeitet,
einen Anschlag, der mit dem Kniegelenk (44) zusammenarbeitet, um eine Veraenderung des Oeffnungsweges der Kontaktarme (26) zu gewaehrleisten, welche auf einer verschiedenen Drehung des Stabes (28) beruht bei einer Oeffnung durch Ausloesen nach Fehlerauftritt,
und elektrische Antriebs- und Anzeige-Hilfsmittel, die beiderseits des Mechanismus (12) angeordnet sind, und die ein erstes und zweites Hilfskontaktsystem (OF, SD) aufweisen, zur Fernanzeige des Leistungsschalter-Zustandes, sowie Hilfsausloeser (MN, MX) vom Voltmeter-Typ, insbesondere mit Mindestspannung oder mit Stromabgabe, dadurch gekennzeichnet, dass der Ausloesehebel (56) einen von zwei Nuten (106, 108) begrenzten Nocken (104) aufweist, der als Anschlag fuer die Drehachse (50) des Kniegelenks (44) dient, und dass der Schaltstab (28) mit einem Vorsprung (110) oder Hoecker versehen ist, der in der Naehe jedes elektrischen Hilfsmittels angeordnet ist, um das erste Hilfskontaktsystem (OF) zur Anzeige der von Hand getaetigten Oeffnung zu steuern vor dem zweiten Hilfskontaktsystem (SD) zur Anzeige eines Fehlers nach einer Ausloesung, und/oder das automatische Wiedereinschalten der Hilfsauloeser (MN, MX) nach einer Ausloesung des Mechanismus.
6. Antriebsmechanismus gemaess Anspruch 5, dadurch gekennzeichnet, dass die Nute (106, 108) des Nockens (104) laengs der unteren gekruemmten Schmalseite des Ausloesehebels (56) zwischen der Drehachse (58) und dem Aufhaengehaken (64) des Hebels (56) angeordnet sind.
7. Antriebsmechanismus gemaess Anspruch 5 oder 6, dadurch gekennzeichnet, dass ein Uebertragungshebel (112) zwischen dem Vorsprung (110) des Stabes (28) und dem entsprechenden elektrischen Hilfsmittel (OF, SD, MN, MX) eingefuegt ist.
8. Antriebsmechanismus gemaess einem der Ansprueche 1 bis 7, dadurch gekennzeichnet, dass die entgegengesetzten Enden des Sockels (70) des Hebels (52) den Schaltstab (28) bzw. die Ausloesestange (68) bedecken, wenn sich der Hebel (52) in den Endlagen des Verschiebungsweges befindet.
EP84401961A 1983-10-21 1984-10-01 Antriebsmechanismus für einen mehrpoligen Niederspannungs-Schutzschalter Expired EP0140761B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401961T ATE29620T1 (de) 1983-10-21 1984-10-01 Antriebsmechanismus fuer einen mehrpoligen niederspannungs-schutzschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8317017A FR2553929B1 (fr) 1983-10-21 1983-10-21 Mecanisme de commande d'un disjoncteur multipolaire basse tension
FR8317017 1983-10-21

Publications (3)

Publication Number Publication Date
EP0140761A2 EP0140761A2 (de) 1985-05-08
EP0140761A3 EP0140761A3 (en) 1985-06-19
EP0140761B1 true EP0140761B1 (de) 1987-09-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401961A Expired EP0140761B1 (de) 1983-10-21 1984-10-01 Antriebsmechanismus für einen mehrpoligen Niederspannungs-Schutzschalter

Country Status (10)

Country Link
US (1) US4622529A (de)
EP (1) EP0140761B1 (de)
JP (1) JP2540483B2 (de)
AT (1) ATE29620T1 (de)
AU (1) AU571018B2 (de)
CA (1) CA1253548A (de)
DE (1) DE3466125D1 (de)
ES (1) ES536906A0 (de)
FR (1) FR2553929B1 (de)
ZA (1) ZA847863B (de)

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FR2789457B1 (fr) * 1999-02-09 2001-03-30 Dosatron Internat Sa Biellette pour dispositif a genouillere , et dispositif a genouillere comportant une telle biellette
DE102007010270B3 (de) * 2007-03-02 2008-09-04 Siemens Ag Fehlerstromschutzschalter
FR2986366B1 (fr) * 2012-01-31 2015-01-09 Hager Electro Sas Appareil electrique de protection de ligne a serrure decalee.
CN112951669A (zh) * 2020-12-25 2021-06-11 默飓电气有限公司 一种用于断路器的同期座

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Also Published As

Publication number Publication date
AU571018B2 (en) 1988-03-31
JP2540483B2 (ja) 1996-10-02
CA1253548A (en) 1989-05-02
EP0140761A3 (en) 1985-06-19
ATE29620T1 (de) 1987-09-15
EP0140761A2 (de) 1985-05-08
DE3466125D1 (en) 1987-10-15
ZA847863B (en) 1985-05-29
ES8506177A1 (es) 1985-06-16
AU3452484A (en) 1985-04-26
FR2553929A1 (fr) 1985-04-26
ES536906A0 (es) 1985-06-16
JPS60167227A (ja) 1985-08-30
US4622529A (en) 1986-11-11
FR2553929B1 (fr) 1986-08-01

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