EP0143022B1 - Thermischer und magnetischer Auslöser für Selbstschalter - Google Patents

Thermischer und magnetischer Auslöser für Selbstschalter Download PDF

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Publication number
EP0143022B1
EP0143022B1 EP84401968A EP84401968A EP0143022B1 EP 0143022 B1 EP0143022 B1 EP 0143022B1 EP 84401968 A EP84401968 A EP 84401968A EP 84401968 A EP84401968 A EP 84401968A EP 0143022 B1 EP0143022 B1 EP 0143022B1
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EP
European Patent Office
Prior art keywords
tripping mechanism
bimetal strip
coil
mechanism according
tripping
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
EP84401968A
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English (en)
French (fr)
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EP0143022A1 (de
Inventor
Pierre Batteux
Robert Denis
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Merlin Gerin SA
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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
Priority claimed from FR8317016A external-priority patent/FR2553931B1/fr
Priority claimed from FR8317015A external-priority patent/FR2553928B1/fr
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT84401968T priority Critical patent/ATE34877T1/de
Publication of EP0143022A1 publication Critical patent/EP0143022A1/de
Application granted granted Critical
Publication of EP0143022B1 publication Critical patent/EP0143022B1/de
Expired legal-status Critical Current

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    • 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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/164—Heating elements
    • 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
    • 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
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms

Definitions

  • thermomagnetic trip device cooperating with the actuation mechanism of a multipole circuit breaker and comprising, by pole, a first electromagnetic trip device and a second bimetal thermal trip device, said first trip device comprising a magnetic circuit with an air gap crossed by the flux induction generated by a control coil, and a movable armature capable of being attracted against a polar surface of the magnetic circuit when the intensity of the current flowing in the coil exceeds a predetermined threshold causing the triggering of the mechanism, said coil comprising a or more turns depending on the triggering characteristics, a flexible connection conductor being secured directly by one of its ends to a movable contact arm of the pole, to ensure the electrical connection with the coil.
  • FIG. 7 to 9 of US Patent No. 3104297 respectively show coils with three, one and two turns, each coil being constituted by a rigid conductor, in particular enameled wire or a strip, wound on a fixed magnetic core.
  • Each coil has a predetermined instantaneous trip threshold value for protection against short-circuit currents.
  • Welding the ends of the coil to auxiliary conductors or connectors is essential for placing the coil in series with the bimetallic strip and the movable contact of the corresponding pole.
  • the trigger threshold of the electromagnetic trigger can be adjusted by the user by varying the air gap formed between the movable armature and the fixed magnetic circuit.
  • the air gap adjustment device is common to all the poles of the circuit breaker, each movable armature being connected by a mechanical connection to a rotary adjustment bar whose angular position is determined by a manual adjustment member.
  • the magnetic circuit of the electromagnetic trip device comprises a ferromagnetic stirrup crossed by a rigid rectilinear conductor, in particular a strip, in which the current of the pole circulates.
  • the conductor passing through the U-shaped magnetic stirrup of the electromagnetic trip device is formed by the braid connecting the movable contact and the bimetallic strip.
  • the triggering threshold is fixed, and the braid extends in a rectilinear direction inside the U-shaped stirrup.
  • the magnetic field generated by such a conductor is weak, and the attraction of the movable armature does not intervenes only for high short-circuit currents.
  • the coil of the electromagnetic trip device is formed by the winding of a braid.
  • the movable armature is formed directly by the bimetallic strip, made of magnetic material, to be attracted against the core when a short-circuit current appears.
  • the bimetallic strip is carried on the other hand by the movable contact. Independent adjustment of the thermal and magnetic trip thresholds is difficult.
  • the object of the invention is to remedy these drawbacks and to allow the production of a highly sensitive magnetothermal trip device allowing simplified factory setting of the instantaneous trip threshold, and good electrodynamic behavior of the bimetallic trip device.
  • the trip device according to the invention is characterized in that the other end of the flexible conductor is connected by bimetal welding, and that the intermediate part of the same flexible conductor constitutes the winding of the coil, the assembly being arranged to ensure a fixed mounting of the electromagnetic trip device interposed between the contact arm and the bimetal thermal trip device.
  • the setting of the instantaneous tripping threshold of the electromagnetic trip unit takes place during the factory mounting of the circuit breaker by choosing the number of turns of the flexible conductor for the constitution of the control coil.
  • the flexible conductor can be a copper braid, bare or coated with a coaxial sheath of insulating material. No interruption of the flexible conductor is necessary at the level of the electromagnetic trip device. In the case of an insulated braid, the latter is wound directly on the fixed core. The use of a bare braid requires the presence of an insulating carcass on the core.
  • the magnetic circuit of the trigger comprises a U-shaped yoke surrounding the coil of the core, and a non-magnetic flange extends between the opposite branches of the yoke to maintain the turns of the coil on the core.
  • the base of the flange is shaped as a support for the bimetallic strip base and as an exhaust gas deionization grid.
  • the control coil can be applied to a pivoting vane trigger or a sliding plunger release.
  • the bimetal thermal trip device is for mixed heating thanks to a driver advantageously having a lyre structure with two lateral branches.
  • the bimetallic strip extends parallel to the driver, being interposed in song between said branches.
  • a flexible conductor is welded to the head of the bimetallic strip and the junction point of the lyre driver on the bimetallic strip can be located in the vicinity of the mounting base of the bimetallic strip, or in an intermediate position between the foot and the head of the bimetallic strip. In the latter case, only the upper part of the bimetallic strip located between the head and the junction point is traversed by the current.
  • the position of the driver's junction point on the bimetallic strip allows you to choose the shape of the thermal trip curve. This lyre structure improves the resistance to electrodynamic forces and avoids the use of reinforcing hoops.
  • FIG. 1 there is shown a pole of a low voltage multipolar electrical circuit breaker comprising a housing 10 of molded insulating material. Each pole has a pair of separable contacts 12, 14 and an arc extinguishing chamber 16 housed in a lower compartment of the insulating housing 10 with the associated thermal magnetic trip device 18.
  • the fixed contact 12 is carried by an end conductor 20 extended externally by a contact pad 22 projecting from the housing 10.
  • the movable contact 14 is arranged at the end of an arm 23 of vertical contact secured by a spring 26 to a multipolar switching bar 24 made of insulating material.
  • the bar 24 is mounted with limited rotation between the open and closed positions of the circuit breaker and extends transversely in the upper part of the housing 10 in a direction perpendicular to the movable contact arms 23 of the poles.
  • the arc extinguishing chamber 16 is constituted by a stack of metal separators or deionization sheets 27 extending perpendicular to the bottom of the housing 10.
  • the switching bar 24 is actuated by means of an operating mechanism (not shown) coupled to a manual control member, in particular a lever 28, and to an automatic trigger hook or lever 30 cooperating with a lock. 32 of a multipolar trip bar 34.
  • the latter extends above the magneto-thermal trip device 18 of each pole, in a direction parallel to the switching bar 24, and is mounted with limited rotation between an armed position for locking the hooking nose of the hook 30 by the bolt 32 and a triggered position releasing the hook 30 by unlocking the lock 32.
  • the passage from the armed position to the triggered position of the rotary bar 34 is controlled by the magnetothermal trip device 18 or by other triggering auxiliaries causing the automatic triggering of the mechanism. and opening the contacts 12, 14 by rotation of the common bar 24.
  • the operation of such a circuit breaker is conventional and is well known to specialists.
  • the magnetothermal trip device 18 of each pole is formed by a monobloc assembly (fig. 1 and 2), comprising a bimetal thermal trip device 36 for protection against overload currents, and an electromagnetic trip device designated by the general reference 38 for protection against short-circuit currents.
  • the electromagnetic trip device 38 is positioned between the arc extinguishing chamber 16 and the bimetallic strip 36, and its magnetic circuit is provided with a U-shaped ferromagnetic carcass or cylinder head 40 which surrounds a control coil 42 mounted on a core 44 fixed magnetic.
  • the core 44 extends perpendicularly to the vertical sheets 27 of the chamber 16 while being secured to the internal central part of the vertical core 46 of the cylinder head 40.
  • a movable armature 50 capable of being actuated against the pole surface 52 of the fixed core 44 when the excitation current of the coil 42 of the trigger 38 exceeds a predetermined threshold.
  • the pivoting stroke of the armature 50 towards the attracted position operates by magnetic attraction against a polari spring 54 sation housed in an axial hole 56 of cylindrical core 44.
  • the spring 54 of the compression type urges the armature 50 towards the separated position (fig. 2) in abutment of a stop formed by the head 57 of a screw 58. The latter passes through the spring 54 for returning the armature 50 and has a threaded end introduced into the core 44 and the core 46 of the cylinder head 40.
  • the bimetallic strip heater 36 is connected to a contact pad 60 aligned with the opposite pad 22 in the longitudinal direction of the pole.
  • the contact arm 23 is electrically connected to the bimetallic strip 36 by means of a continuous flexible conductor 62, the intermediate part of which is wound around the core 44 to constitute the coil 42 for controlling the electromagnetic trip device 38.
  • the coil 42 may comprise a single turn (fig. 1 and 2) or more turns (fig. 3, 4) depending on the size of the device and the setting of the instant trigger threshold of the trigger 38.
  • the single or multiple passage of the flexible conductor 62 inside of the cylinder head 40 is carried out during the mounting of the device without any interruption of the conductor 62 and without welding points at the level of the coil 42.
  • One end of the flexible conductor 62 is welded to the contact arm 23 and the opposite end to the head of the bimetallic strip 36.
  • the flexible conductor 62 is generally formed by a conductive braid 64, in particular made of copper, which can be insulated by a coaxial outer sheath 65 made of plastic insulating material (fig.5) or be devoid of insulator (fig.6).
  • the insulated braid 64 can be wound directly on the magnetic core 44 (fig. 1 to 3) without an insulating intermediate piece, while the use of a bare braid 64 requires the use of an insulating carcass 66 (fig. 4 ) positioned between the core 44 and the cylinder head 40.
  • the insulating carcass 66 has grooves 68 for positioning the turns of the coil 42, and partition 70 partitions for the isolation of the turns of the bare braid 64.
  • the turns of the coil 42 on the core 44 are maintained by means of a metal flange 72 for closing the U of the cylinder head 40.
  • the flange 72 is made of non-magnetic material, in particular stainless steel , brass or bronze, and has a curved tab 74 which serves as a support for the bimetallic strip 36.
  • the factory setting of the trigger threshold for the bimetallic strip 36 is carried out by means of an adjustment screw 76 capable of deforming the foot of the bimetallic strip 36 fixed to the flange 74 of flange 72.
  • the base of the flange 72 of the trigger 38 bears on the bottom of the insulating housing 10 and is located on the path of the exhaust gases from the arc extinguishing chamber 16.
  • a plurality of slots 78 is arranged in the base of the flange 72 to facilitate the escape of the cut gases expelled to the outside through an opening 80 of the housing 10, located under the contact pad 60.
  • the metal flange 72 also plays the role of an exhaust gas cooling grid during their passage through the slots 78.
  • the non-magnetic flange 72 is eliminated, and the ferromagnetic yoke 40 is limited to a simple support bracket for the fixed core 44.
  • the excitation coil 42 is formed by three turns of the flexible conductor 62 wound on the insulating carcass 66 of the magnetic core 44.
  • the latter is hollow for the housing of the return spring 54 of the pivoting frame 50, the end-of-travel stop being formed by a stop 82 integral with the carcass 66.
  • the bimetal foot 36 is fixed directly to a lower tab 84 of the ferromagnetic yoke 40.
  • the movable armature 50 of the electromagnetic trip device 38 of FIGS. 1 to 4 and 7 is shaped as a pivoting pallet interposed between the pole surface 52 of the core 44 and the bimetal actuator 36.
  • the lower end of the pallet constitutes the pivot point on the branch 48 of the cylinder head 40, and the upper end activates a projection 86 (FIG. 1) of the trigger bar 34 so as to release the hook 30 when the pallet is pressed by magnetic attraction against the pole surface 52 of the core 44.
  • the driver 90 of the bimetallic trip unit 36 is made of an electrically conductive or resistant material.
  • the deflection of the bimetallic strip 36 depends on the intensity of the current flowing in the bimetallic strip 36 and in the driver 90 and the thermal trip threshold is adjustable by the adjusting screw 76 according to the size of the circuit breaker.
  • the bimetallic strip 36 has an elongated structure, the base of which is provided with a fixing foot 91 'and the opposite end of which has a head 92 capable of actuating the trigger bar 34 for a predetermined deflection of the bimetallic strip 36 corresponding to an overhang of triggering grief.
  • the foot 91 of the bimetallic strip 36 is fixed to a tab or flange 72 support integral with the fixed cylinder head 40 of the electromagnetic trip device 38.
  • the flexible conductor 62 in particular a braid, is welded to the active head 92 of the bimetallic strip 36 to form an electrical connection with the pole's mobile contact.
  • the adjusting screw 76 passes through the foot 91 for fixing the bimetallic strip 36 and the associated flange 72, the latter being folded into two deformable and / or elastic branches under the action of the screw 76.
  • the setting of the trigger point of the thermal trip device is carried out in the factory by means of the screw 76, causing mechanical deformation of the base of the bimetallic strip 36.
  • the driver 90 extends parallel to the bimetallic strip 36 and has a general lyre structure provided with two lateral branches 93, 94 joined to a central co-planar core 95.
  • the bimetallic strip 36 is interposed between the two branches 93, 94 in U of the lyre, and the core 95 is superimposed and then fixed by welding to the bimetallic strip 36 at an intermediate point 96 located longitudinally between the foot 91 and the end 92 of the bimetallic strip 36.
  • the width of the core 95 corresponds substantially to that of the bimetallic strip 36, and the ends of the lateral branches 93, 94 of the lyre are connected by welding and crimping to the contact pad 60 of the pole.
  • the track 60 extends perpendicularly to the bimetallic strip 36 and to the driver 90, and engages in the cage of a connection terminal (not shown), formed in a housing of the insulating housing 10.
  • the current 1 of line enters the trigger by the braid 62, flows in the direction of the arrow in the upper part of the bimetallic strip 36 to the point 96 of junction of the driver 90 in lyre.
  • the current 1 reverses at point 96, dividing into two elementary currents I / 2 which take the two lateral pins 93, 94 in parallel with the driver 90 to exit the pole via the track 60.
  • Each branch 93, 94 of the lyre is thus traversed by half the intensity of the current flowing in the opposite direction in the bimetallic strip 36.
  • the edge arrangement (fig. 10) of the bimetallic strip 36 between the lateral branches 93, 94 of the driver 90 in lyre places the sections according to their bigger.
  • the junction point 96 of the driver 90 in a lyre is substantially at the level of the foot 91 of the bimetallic strip 36.
  • the current flows throughout the length of the bimetallic strip 36, between head 92 and foot 91, and this results in an increase in direct heating.
  • the longitudinal position of the point 96 where the driver 90 joins the bimetallic strip 36 can be arbitrary as a function of the thermal tripping curve, and the tripping time varies as a function of the position of said point 96.
  • the driver 90 in lyre may include a stack of metal foils of different materials intended to adjust the electrical resistance of the driver to a predetermined value.
  • the flexible conductor 62 is formed by a copper braid for devices of higher ratings, and by a resistant braid for devices of lower ratings.
  • the braid is made for example of stainless steel or cupro-nickel and its connection to the head 92 makes it possible to increase the indirect heating and the temperature difference in the bimetallic strip 36.
  • the thermal resistance is also improved by Limitation of the presumed current.
  • the braid can also be bimetallic, for example copper and stainless steel.
  • the heads of the three bimetallic strips 36 of a three-pole circuit breaker each have a ramp 150 coming into contact with a stop 152 of the trigger bar 34.
  • the hook 30 for triggering the mechanism is locked in the armed position by a lock 32 secured to the bar 34.
  • a mechanical device makes it possible to adjust the thermal trigger threshold by bidirectional translation according to the arrow F of the trigger bar 34 according to the alignment direction of the bimetallic strips 36.
  • This device comprises a cam 160 cooperating with one end of the trigger bar 34.
  • the cam 160 is rotated by a control rod 162 secured to an adjustment button 164.
  • a return spring 166 cooperates opposite the cam 160 with the other end of the trigger bar 34.
  • the operation of the mechanical device for adjusting the thermal trigger threshold is well known to specialists, and it suffices to recall that the translation d e the trigger bar 34 by rotation of the adjustment button 164 adjusts the interval between the stops 152 of the bar 34 and the ramps 150 of the bimetallic strips 36.
  • the button 164 is positioned in an opening 167 of the insulating housing 10.
  • a compensation bimetal strip 168 is inserted in the mechanical adjustment device to take into account the variation in the ambient temperature.
  • the compensation bimetal 168 has a spiral structure and is housed inside the adjustment knob 164 in contact with the ambient air. The ends of the bimetallic strip 168 in a spiral are slidarized to the adjustment knob 164 and to the rod 162 for actuating the cam 160.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Claims (11)

1. Magnetothermischer Auslöser, der mit dem Betätigungsmechanismus eines mehrpoligen Schalters zusammenarbeitet und je Pol einen ersten elektromagnetischen Auslöser (38) und einen zweiten thermischen Bimetall-Auslöser (36) aufweist, wobei der genannte erste Auslöser einen Magnetkreis besitzt mit einem Luftspalt, der von dem durch die Steuerspule (42) erzeugten Induktionsfluss durchströmt wird, und einen beweglichen Anker (50), der gegen eine Poloberfläche des Magnetkreises angezogen wird, wenn die Stärke des in der Spule (42) fliessenden Stromes eine vorbestimmte Schwelle überschreitet, die die Auslösung des Mechanismus hervorruft, wobei die genannte Spule den Auslösemerkmalen entsprechend eine oder mehrere Windungen aufweist, und wobei ein biegsamer Verbindungsleiter (62) direkt mittels einem seiner Enden an einem beweglichen Kontaktarm (23) des Pols verbunden ist, um die elektrische Verbindung mit der Spule (42) zu gewährleisten, dadurch gekennzeichnet, dass das andere Ende des biegsamen Leiters (62) durch Schweissen mit dem Bimetallstreifen (36) verbunden ist, und dass der mittlere Teil desselben biegsamen Leiters die Wicklung der Spule (42) bildet, wobei das Ganze so ausgeführt ist, um eine feste Montage des zwischen dem Kontaktarm (23) und dem thermischen Bimetall-Auslöser (36) eingefügten elektromagnetischen Auslösers (38) zu gewährleisten.
2. Auslöser gemäss Anspruch 1, dadurch gekennzeichnet, dass der Magnetkreis ein Magnetjoch (40) aufweist, das von einem U-förmigen Bügel gebildet wird und die Steuerspule (42) des Kerns (44) umgibt, und dass der bewegliche Anker (50) schwenkbar auf einem Zweig (48) des Magnetjochs (40) gelagert ist und in die gespreizte Lage gebracht wird durch ein elastisches Rückholmittel (54), das in einem Loch (56) des Kerns (44) angeordnet ist.
3. Auslöser gemäss Anspruch 2, dadurch gekennzeichnet, dass sich ein Flansch (72) aus unmagnetischem Metall zwischen den beiden entgegengesetzten Zweigen des U-förmigen Bügels erstreckt, um die Windungen der Spule (42) auf dem Kern (44) zu halten, und dass der Sockel des Flansches (72) als Träger des Bimetallfusses (36) und als Desionisationsgitter der Abgase ausgebildet ist.
4. Auslöser gemäss Anspruch 3, dadurch gekennzeichnet, dass sich der Sockel des Flansches (72) auf den Boden des Isoliergehäuses (10) stützt und dabei zwischen der Lichtbogenlöschkammer (16) und einer Öffnung (80) des Gehäuses (10) liegt, und dass Schlitze (78) im Sockel des Flansches (72) vorgesehen sind, um das Entweichen der Gase nach draussen gegenüber dem festen Kontakt (12) zu verbessern.
5. Auslöser gemäss einem der Ansprüche 2, 3 oder 4, dadurch gekennzeichnet, dass das elastische Rückholmittel (54) des beweglichen Ankers (50) durch eine Druckfeder gebildet wird, und dass eine Schraube (58) die Feder (54) im Innern des Loches (56) durchquert, wobei der Kopf (57) der Schraube (58) als einstellbarer Endstellungs-Anschlag für den in abgespreizter Lage gestellten Anker (50) dient.
6. Auslöser gemäss Anspruch 2, dadurch gekennzeichnet, dass der bewegliche Anker (50) von einer Platte gebildet wird, die in der gespreizten Lage gegen eine Sperre (82) in Anschlag kommt, und dass die genannte Sperre (82) zwischen dem elastischen Rückholmittel (54) und dem Gelenkpunkt der schwenkbaren Platte auf dem Zweig (48) des Magnetjochs (40) angeordnet ist, um jeden Stör-Luftspalt am genannten Gelenkpunkt auszuschliessen.
7. Auslöser gemäss einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der zweite thermische Bimetall-Auslöser eine gemischte Heizung hat und je Pol aufweist:
- einen Bimetallstreifen (36) mit einer länglichen Struktur, der sich längs zwischen einem Befestigungsfuss (91) und einem Betätigungskopf (92) erstreckt, der bei einer vorbestimmten Beugung aktiv wird, die der thermischen Auslöseschwelle entspricht,
- ein Heizelement oder Heizer in Form einer Leier, ausgerüstet mit einer in der Nähe des Bimetallstreifens angeordneten wärmeabstrahlenden Oberfläche und mit einem mechanischen und elektrischen Verbindungspunkt zur Befestigung des Heizers auf dem Bimetallstreifen und zum Durchfliessen des Stromes zwischen dem Bimetallstreifen und dem Heizer, wobei die genannte Leier zwei seitliche Arme (93, 94) besitzt.
- wobei sich der Bimetallstreifen (36) parallel zum Heizer (90) erstreckt und hochkant zwischen den genannten Armen (93, 94) engefügt ist, welche einerseits mit einem zentralen, koplanaren, an dem Bimetallstreifen (36) befestigten Steg verbunden sind, um den genannten Verbindungspunkt (96) zu bilden, und andererseits mit einer Kontaktfahne (60) verbunden sind, wobei jeder elementare Arm (93, 94) von einem Bruchteil des Stromes, der in entgegengesetzter Richtung in dem Bimetallstreifen (36) fliesst, durchflossen wird.
8. Auslöser gemäss Anspruch 7, dadurch gekennzeichnet, dass sich jeder Arm (93, 94) des leierförmigen Heizers (90) in die Längsrichtung des Bimetallstreifen (36) erstreckt und von der Hälfte der in dem Bimetallstreifen (36) fliessenden Stromstärke durchflossen wird.
9. Auslöser gemäss Anspruch 8, dadurch gekennzeichnet, dass der Verbindungspunkt (96) des leierförmigen Heizers (90) entweder in der Nähe des Befestigungsfusses (91) des Bimetallstreifens (36) gelegen ist, oder in einer mittleren Lage zwischen dem Fuss (91) und dem Kopf (92) des Bimetallstreifens (36).
10. Auslöser gemäss einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, dass der Befestigungsfuss (91) des Bimetallstreifens (36) mit dem Flansch (72) verbunden ist, der von einem in zwei deformierbare und/oder elastische Arme gefalteten Blech gebildet wird, und dass eine Stellschraube (76) den genannten Fuss (91) und Flansch (72) durchquert, um eine mechanische Deformierung des Sockels des Bimetallstreifens (36) zu gewährleisten, was eine im Werk ausführbare Einstellung der thermischen Auslöseschwelle ermöglicht.
11. Auslöser gemäss einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der biegsame Leiter (62) von einem Zopf gebildet wird, welcher aus einem leitfähigen Material besteht mit einem elektrischen spezifischen Leitungswiderstand, der höher ist als der von Kupfer, insbesondere aus rostfreiem Strahl oder aus Kupfer-NickelLegierung.
EP84401968A 1983-10-21 1984-10-02 Thermischer und magnetischer Auslöser für Selbstschalter Expired EP0143022B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401968T ATE34877T1 (de) 1983-10-21 1984-10-02 Thermischer und magnetischer ausloeser fuer selbstschalter.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8317016 1983-10-21
FR8317015 1983-10-21
FR8317016A FR2553931B1 (fr) 1983-10-21 1983-10-21 Bobine de commande d'un declencheur electromagnetique de disjoncteur
FR8317015A FR2553928B1 (fr) 1983-10-21 1983-10-21 Bilame a chauffage mixte pour declencheur thermique d'un appareil de coupure

Publications (2)

Publication Number Publication Date
EP0143022A1 EP0143022A1 (de) 1985-05-29
EP0143022B1 true EP0143022B1 (de) 1988-06-01

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EP84401968A Expired EP0143022B1 (de) 1983-10-21 1984-10-02 Thermischer und magnetischer Auslöser für Selbstschalter

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EP (1) EP0143022B1 (de)
DE (1) DE3471809D1 (de)

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CN104054154A (zh) * 2011-11-21 2014-09-17 Abb技术有限公司 用于断路器的热磁释放机构
CN104900456A (zh) * 2015-05-06 2015-09-09 温州高能电气有限公司 塑壳断路器及其脱扣机构

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FR2654254B1 (fr) * 1989-11-06 1995-11-24 Merlin Gerin Dispositif de telecommande pour disjoncteur electrique.
DE19629960A1 (de) * 1996-07-25 1998-01-29 Abb Patent Gmbh Überstromauslöser für ein elektrisches Installationsgerät, insbesondere für einen Leitungsschutzschalter
FR2924531A1 (fr) * 2007-11-29 2009-06-05 Hager Electro S A S Soc Par Ac Dispositif de declenchement thermique pour appareil electrique de protection de ligne
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CN106206199A (zh) * 2016-09-26 2016-12-07 常熟开关制造有限公司(原常熟开关厂） 低压断路器的脱扣装置
CN114023614B (zh) * 2021-10-29 2023-12-22 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） 一种大范围可调电磁短路脱扣器

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CN104054154B (zh) * 2011-11-21 2016-03-09 Abb技术有限公司 用于断路器的热磁释放机构
CN103681146A (zh) * 2013-12-10 2014-03-26 德力西电气有限公司 一种小型断路器
CN103681146B (zh) * 2013-12-10 2016-08-17 德力西电气有限公司 一种小型断路器
CN104900456A (zh) * 2015-05-06 2015-09-09 温州高能电气有限公司 塑壳断路器及其脱扣机构

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DE3471809D1 (en) 1988-07-07

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