EP0620579B1 - Einstellvorrichtung des Auslöseansprechwerts eines mehrpoligen Schutzschalters - Google Patents

Einstellvorrichtung des Auslöseansprechwerts eines mehrpoligen Schutzschalters Download PDF

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Publication number
EP0620579B1
EP0620579B1 EP94410023A EP94410023A EP0620579B1 EP 0620579 B1 EP0620579 B1 EP 0620579B1 EP 94410023 A EP94410023 A EP 94410023A EP 94410023 A EP94410023 A EP 94410023A EP 0620579 B1 EP0620579 B1 EP 0620579B1
Authority
EP
European Patent Office
Prior art keywords
adjustment
tripping
threshold
tripping threshold
knob
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
EP94410023A
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English (en)
French (fr)
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EP0620579A1 (de
Inventor
Jean-Luc Payet-Burin
Eric Ogier
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.)
Schneider Electric SE
Original Assignee
Schneider Electric SE
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0620579A1 publication Critical patent/EP0620579A1/de
Application granted granted Critical
Publication of EP0620579B1 publication Critical patent/EP0620579B1/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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H2071/7481—Means for adjusting the conditions under which the device will function to provide protection with indexing means for magnetic or thermal tripping adjustment knob

Definitions

  • the known adjustment means conventionally comprise an adjustment button coupled to the movable core of the trigger by a mechanical connection.
  • a trip unit is generally used to cause the instantaneous trip of a circuit breaker following a short-circuit current. The current flowing through the excitation coil is then sufficient to cause the attraction of the moving core.
  • the adjustment button makes it possible to modify the initial position of the mobile core in order to reduce or increase the air gap for adjusting the triggering threshold.
  • the adjustment button is permanently accessible, which made it possible for certain applications, for example engine starting, to distort the triggering threshold above the protection value to avoid inadvertent triggering during the transient start-up phase. After starting, the true trip threshold was then restored to the recommended protection value. Forced release of the release during the transient phase inhibits tripping of the circuit breaker, which can cause damage to the receivers.
  • the object of the invention is to provide a reliable and precise adjustment device for the tripping threshold of a circuit breaker.
  • Each step of adjusting the ring corresponds to a precise position of the end stop for adjusting the high trigger threshold.
  • the button allows fine adjustment of the trigger threshold between a minimum value and the high threshold. Any modification of the high threshold is inhibited after fitting the faceplate.
  • the coaxial arrangement of the button and the ring facilitates the adjustment of the trigger threshold.
  • the button comprises a lug coming into engagement against the stop when the maximum threshold is reached, and a pinion cooperating with a rack of an adjustment bar.
  • the adjustment bar is common to all the poles, and the positioning pad of each trigger is slidably mounted on an axis integral with the magnetic circuit, and parallel to the trigger bar.
  • the positioning pad is equipped with a screw cooperating with the ramp of the control member to ensure a pre-setting of the release, said screw being accessible through an orifice in the housing.
  • a multipolar circuit breaker 10 with molded insulating casing 12 comprises a breaking module 14 per pole, formed by a one-piece bulb 16 made of molded plastic.
  • the bulb 16 has the shape of a rectangular parallelepiped, and comprises a front face 18 having an orifice 20 for passage of the movable contact 22.
  • a fixed contact device 24, 26 connected respectively by conductors 28, 30 for connection to a first pad 32 of a connection terminal 34, and to a second pad 36 intended to be connected by a screw 38 to a third contact pad 40 of a trigger device 42.
  • the tripping device 42 comprises an electromagnetic trip device 44 fitted opposite the pad 40, with a fourth contact pad 46 forming part of the other terminal 48 pole connection.
  • the trip device 44 is electrically inserted in series in each pole with the contacts 22, 24, 26 of the breaking module 14.
  • the trigger device 42 further comprises a trigger bar 50 made of insulating material, and mounted with limited rotation between an armed position and a triggered position following the action of the control member 52 of the trigger 44.
  • the bar 50 rotary is moved by the member 52 to the triggered position as soon as the current flowing in the pole exceeds a predetermined threshold.
  • the trigger bar 50 comprises a central lug 54 which cooperates with a latch 56 for attaching a control mechanism 58 to toggle joint 60 and to lever 62.
  • the mechanism 58 is common to all of the poles, and is housed inside the housing 12, only the handle 62 being accessible from the outside by passing through a lumen 64 formed in the front face of the housing 12, for controlling manual circuit breaker 10.
  • the lower link 66 of the toggle joint 60 is coupled to a protuberance 68 of a switching bar 70 serving to support the movable contacts 22 of all the poles.
  • the switching bar 70 is made of insulating material and extends parallel to the trigger bar 50 in the transverse direction of the poles.
  • the lock 56 unlocking order can come from the main electromagnetic trip device 44, or from an auxiliary trip device housed in the same housing 12, in particular a trip device with undervoltage MN, with current emission MX, or differential.
  • the electromagnetic trip device 44 of each pole comprises a magnetic circuit or a yoke 76 framing a cylindrical excitation coil 78 electrically connected to the pads 40, 46.
  • the underside of the yoke 76 carries a core fixed 80 penetrating axially inside the coil 78, and cooperating with a movable core 82 plunger passing through the upper face of the yoke 76 while being slidably mounted opposite the fixed core 80 with interposition of an axial gap 84.
  • the coil 78 is wound around a cylindrical sheath 86 of insulating material which sheaths the fixed core 80 and movable core 82 assembly.
  • Such a tripping device is described in patent FR-A-2 626 713 of the applicant.
  • the control member 52 is formed by an actuation lever 88 pivotally mounted on a fixed axis 90 carried by an extension 92 of the cylinder head 76.
  • the actuation lever 88 is articulated on a lug 94 of the movable core 82, and a return spring 96 (fig 8) is anchored between the lever 88 and a protrusion 98 of the cylinder head 76, to urge the control member 52 in a clockwise direction, corresponding to an upward movement of the movable core 82 in FIG. 3.
  • the pivoting movement of the lever 88 is transformed into a sliding movement of the movable core 82 to ensure the adjustment of the air gap 84.
  • the sliding movement of the movable core 82 during the magnetic attraction against the fixed core 80 is transformed into a pivoting movement of the actuation lever 88, which comprises a tongue 100 for controlling the trigger bar 50.
  • the tongue 100 of the actuating lever 88 comprises an oblique ramp 102 cooperating with a positioning stud 104 movable in translation or sliding along a fixed axis 106 carried by the extension 92, and extending parallel above the axis 90 of the actuating lever 88.
  • the positioning pad 104 is equipped with a drive member 108 (fig 8) intended to engage in an orifice 110 of an adjustment bar 112 (fig 2 ) forming part of the setting device 114 of the trip device 44.
  • the strip 112 extends parallel to the trip bar 50 and is common to all the trip devices 44 of the circuit breaker 10.
  • the adjustment device 114 shown in detail in FIGS. 3, 6 and 7, comprises a rotary knob 116 having a head 118 with adjustment slot, and on the opposite, a pinion 120 capable of driving in translation a rack 122 of the adjustment bar 112.
  • the button 116 is housed coaxially inside an annular ring 124 provided with an internal projection 126 cooperating with a lug 128 of the button 116 to constitute an end stop 126a, which is adjustable as a function of the angular position. of the ring 124.
  • the lateral surface of the ring 124 is provided with at least one blocking tab 130 intended to be nested between consecutive pins 132, 134, 136, 138, 140, 142 angularly distributed around a light 144 arranged in the face upper 146 of housing 12.
  • Each adjustment step of the ring 124 corresponds to a predetermined angular position of the end stop 126a. This angular position of the ring 124 makes it possible to adjust the high trigger threshold of the trigger 44 to a maximum value, while the button 116 authorizes a fine and continuous adjustment of the triggering threshold between a constant minimum value called the low threshold and said adjustable value of the high threshold.
  • the high threshold is reached when the lug 128 of the rotary knob 116 engages against the stop 126a of the ring 124.
  • the upper face 146 of the housing 12 is covered by a faceplate 148, which comprises a first rectangular opening 150 for passage of the handle 62, and a second circular opening 152 for access to the head of the button 116 for fine adjustment of the triggering threshold.
  • the diameter of the second opening 152 is less than the outside diameter of the ring 124, so that the placement of the faceplate 148 on the face 146 of the housing 12 allows fine adjustment by the button 116 from the front face of the circuit breaker , but hides the ring 124 by prohibiting any modification of the high threshold.
  • the trigger threshold of the trigger 44 is marked on the faceplate 148 by means of several marks A, B, C, D, E, F ... (see FIGS. 4 and 6) distributed angularly around the second opening 152.
  • Each mark corresponds to a multiple of the nominal current In passing through the circuit breaker.
  • the mark A corresponds to 6 In
  • the mark B to 7 In, etc. until the mark G which corresponds to 12 In.
  • Each value of the high threshold corresponds to a certain position of the locking tab 130 between two consecutive pins 132 to 142 of the housing 12.
  • the tab 130 of the adjustment ring 124 is inserted between the consecutive pins 138 and 140.
  • the fine adjustment by the button 118 then makes it possible to adjust the triggering threshold between 6 In and 10 In.
  • FIG. 4 shows an elevation view of the circuit breaker 10 after fitting the faceplate 148, and after adjusting the high tripping threshold by the ring 124.
  • the rotation of the knob 118 causes the translation of the adjustment bar 112 in a given direction, with simultaneous driving in the same direction of the positioning pad 104 acting on the ramp 102 of the tongue 100 of the actuating lever 88.
  • the movement of the stud 104 in the direction of the ascent of the ramp 102 (downwards in FIG. 8) causes the actuating lever 88 to pivot in anti-clockwise (fig 3), followed by a depression of the movable core 82 in the direction of the fixed core 80 so as to reduce the air gap 84.
  • the displacement in translation of the stud 104 in the direction of the descent of the ramp 102 upwards in FIG.
  • the appearance of a short-circuit current causes the predetermined trigger threshold to be exceeded, resulting in a magnetic attraction of the movable core 82 against the fixed core 80 against the restoring force of the spring 96.
  • the pivoting of the actuation lever 88 in the clockwise direction causes the trigger bar 50 to rotate towards the triggered position, so as to release the hooking 71 of the mechanism 58 for opening the contacts.
  • the positioning pad 104 of each pole is additionally equipped with a screw 160 accessible through an orifice 162 of the housing 12 to allow preset triggering.
  • the active end of the screw 160 acts directly on the ramp 102 of the actuation lever 88.
  • the adjustment by the screw 160 constitutes a factory adjustment by pole, while the adjustment device 114 is a centralized customer adjustment common to the different poles .
  • adjustment device 114 can be used for any other type of trigger, in particular with a movable paddle instead of the plunger core 82.

Claims (7)

  1. Vorrichtung zur Einstellung des Auslöse-Ansprechwerts eines elektrischen Schaltgeräts, insbesondere eines Mehrpol-Leistungsschalters (10) mit Isolierstoffgehäuse (12), welches einen, mechanischen Auslösemitteln (50), (56) zugeordneten Mechanismus (58) mit einer Verklinkung (71) sowie einen, in jedem Pol angeordneten elektromagnetischen Auslöser (44) zum Lösen der Verklinkung (71) bei Überschreiten eines festgelegten Auslöse-Ansprechwerts durch den Strom enthält, wobei der genannte Auslöser
    - einen Magnetkreis (76) mit einem feststehenden Kern (80) und einer Erregerspule (78),
    - einen beweglichen Kern (82), der an ein, bei der Anziehung des beweglichen Kerns (82) durch den feststehenden Kern (80) mit den mechanischen Auslösemitteln zusammenwirkendes Betätigungsorgan (52) gekoppelt ist,
    - Rückstellmittel (96), die den beweglichen Kern (82) in Richtung einer vom feststehenden Kern (80) zurückgezogenen Stellung unter Einhaltung eines Luftspalts (84) beaufschlagen, dessen Breite den genannten Auslöse-Ansprechwert bestimmt,
    - Einstellmittel zur Veränderung des Luftspalts (84) mit Hilfe eines Drehreglers (116) zur Feineinstellung des Auslöse-Ansprechwerts,
    - sowie Umschaltmittel zur Veränderung der Winkellage eines Endlagenanschlags (126a) umfaßt, der dazu dient, die Drehbewegung des Reglers (116) zur Festlegung eines maximalen Auslöse-Ansprechwerts zu begrenzen, dadurch gekennzeichnet, daß
    - ein Positionierelement (104) durch den Drehregler (116) mitgenommen wird, um mit einer Schräge (102) des Betätigungsorgans (52) zusammenzuwirken,
    - der Endlagenanschlag (126a) an einem Vorsprung (126) eines den Regler (116) koaxial umgebenden Rings (124) ausgebildet ist,
    - der Ring (124) nach erfolgter Einstellung des Endlagenanschlags (126a) durch eine an der Oberseite (146) des Gehäuses (12) angebrachte Abdeckung (148) abgedeckt wird, wobei die genannte Abdeckung (148) eine erste Öffnung (150) zur Durchführung des Kipphebels (62) zur manuellen Betätigung des Mechanismus' (58) sowie eine zweite Öffnung (152) für den Zugang zum Kopf des Reglers (116) zur Feineinstellung des Auslöse-Ansprechwerts aufweist,
    - der Durchmesser der zweiten Öffnung (152) kleiner ist als der Außendurchmesser des Rings (124), so daß bei angebrachter Abdeckung (148) keinerlei Verstellung des Endlagenanschlags (126a) möglich ist.
  2. Vorrichtung zur Einstellung des Auslöse-Ansprechwerts nach Anspruch 1, dadurch gekennzeichnet, daß die Umschaltmittel eine Blockierzunge (130) aufweisen, die dazu dient, zwischen aufeinanderfolgenden Stiften (132), (134), (136), (138), (140), (142) einzurasten, welche in Winkelabständen um eine im Gehäuse (12) ausgebildete Aussparung (144) herum angeordnet sind.
  3. Vorrichtung zur Einstellung des Auslöse-Ansprechwerts nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Regler (116) eine bei Erreichen des maximalen Ansprechwerts gegen den Anschlag (126a) stoßende Nase (128) sowie ein Ritzel (120) aufweist, das mit einer Zahnstange (122) einer Einstellschiene (112) zusammenwirkt.
  4. Vorrichtung zur Einstellung des Auslöse-Ansprechwerts nach Anspruch 3, dadurch gekennzeichnet, daß die Einstellschiene (112) parallel zur Auslösewelle (50) angeordnet und allen Polen gemeinsam zugeordnet ist, daß das Positionierelement (104) jedes Auslösers (44) längs einer parallel zur Schiene (112) angeordneten, ortsfesten Achse verschiebbar gelagert ist, und daß die genannte Achse (106) auf einem Fortsatz (92) des Magnetkreises (76) befestigt ist.
  5. Vorrichtung zur Einstellung des Auslöse-Ansprechwerts nach Anspruch 4, dadurch gekennzeichnet, daß das Positionierelement (104) eine mit einer Schräge (102) des Betätigungsorgans (52) zusammenwirkende Schraube (160) aufweist, um eine Voreinstellung der Auslösung zu gewährleisten, wobei die genannte Schraube (160) durch eine im Gehäuse (12) ausgebildete Öffnung (162) zugänglich ist.
  6. Vorrichtung zur Einstellung des Auslöse-Ansprechwerts nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß das Positionierelement (104) ein Mitnehmerelement (108) aufweist, das dazu dient, in eine Öffnung (110) einer Einstellschiene (112) einzugreifen, und daß das Betätigungsorgan (52) einen Betätigungshebel (88) umfaßt, der schwenkbar auf einer fest mit dem Magnetkreis (76) verbundenen zweiten Achse (90) gelagert ist, wobei die genannte zweite Achse (90) parallel zur ersten Achse (106) verläuft.
  7. Vorrichtung zur Einstellung des Auslöse-Ansprechwerts nach Anspruch 1, dadurch gekennzeichnet, daß die Abdeckung (148) mehrere Markierungen A, B, C, D, E, F aufweist, die in Winkelabständen um die zweite Öffnung (152) sowie den Kopf (118) des Reglers (116) herum angeordnet sind, wobei jede Markierung einem Vielfachen des den Leistungsschalter durchfließenden Nennstroms entspricht.
EP94410023A 1993-04-16 1994-04-06 Einstellvorrichtung des Auslöseansprechwerts eines mehrpoligen Schutzschalters Expired - Lifetime EP0620579B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304856A FR2704091B1 (fr) 1993-04-16 1993-04-16 Dispositif de réglage du seuil de déclenchement d'un disjoncteur multipolaire.
FR9304856 1993-04-16

Publications (2)

Publication Number Publication Date
EP0620579A1 EP0620579A1 (de) 1994-10-19
EP0620579B1 true EP0620579B1 (de) 1997-05-07

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EP94410023A Expired - Lifetime EP0620579B1 (de) 1993-04-16 1994-04-06 Einstellvorrichtung des Auslöseansprechwerts eines mehrpoligen Schutzschalters

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US (1) US5467069A (de)
EP (1) EP0620579B1 (de)
DE (1) DE69403022T2 (de)
ES (1) ES2104317T3 (de)
FR (1) FR2704091B1 (de)

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Publication number Publication date
FR2704091A1 (fr) 1994-10-21
FR2704091B1 (fr) 1995-06-02
DE69403022T2 (de) 1997-10-30
ES2104317T3 (es) 1997-10-01
DE69403022D1 (de) 1997-06-12
EP0620579A1 (de) 1994-10-19
US5467069A (en) 1995-11-14

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