EP2398034B1 - Hilfsauslösevorrichtung zur Verwendung in einem Auslöseblock - Google Patents

Hilfsauslösevorrichtung zur Verwendung in einem Auslöseblock Download PDF

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Publication number
EP2398034B1
EP2398034B1 EP20110354005 EP11354005A EP2398034B1 EP 2398034 B1 EP2398034 B1 EP 2398034B1 EP 20110354005 EP20110354005 EP 20110354005 EP 11354005 A EP11354005 A EP 11354005A EP 2398034 B1 EP2398034 B1 EP 2398034B1
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EP
European Patent Office
Prior art keywords
spring
arm
support plate
tripping
called
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Application number
EP20110354005
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English (en)
French (fr)
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EP2398034A1 (de
Inventor
Yves Schneider Electric Industries SAS Belin
Michael Schneider Electric Industries SAS Seguin
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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    • 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
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
    • 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
    • H01H71/505—Latching devices between operating and release 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • H01H2071/0278—Mounting several complete assembled circuit breakers together with at least one of juxtaposed casings dedicated to an auxiliary device, e.g. for undervoltage or shunt trip

Definitions

  • the present invention relates to an auxiliary trip device housed in a modular insulating housing that can be attached to a circuit breaker block.
  • a tripping device comprising a control mechanism having a tripping link for acting on the tripping latch of the circuit breaker block, said mechanism comprising a transmission rod coupled to a handle, a plate rotatably mounted in the housing and having a mechanical link breakable with the transmission rod, and a trigger lever controlled by an electromagnet to cause in the event of a fault, the breakage of the mechanical link causing the automatic triggering of the mechanism independently of the handle and the actuation of the lock triggering the associated circuit breaker block, said mechanism being recalled in a position armed by the lever against a return spring said first able to drive the plate in the unlocked position of the breaker block in case of tripping, an electro magnet with an excitation coil and a magnet circuit mobile frame tick, which can occupy either a first position spaced from the magnetic circuit under the
  • Auxiliary devices with no voltage are intended in a manner known per se to cause the opening of the circuit breaker when the grid voltage is too low compared to its nominal value, or if the voltage at its terminals is cut off by a stop emergency.
  • An electromagnet is kept under tension. When the voltage drops below a predefined threshold, the electromagnet is deactivated and it activates the trigger bar of a mechanism previously armed by the joystick. The electromagnet is reactivated mechanically when the auxiliary mechanism is triggered before its coil is energized again. Bringing the gap of the magnetic circuit of the coil to zero allows to limit the current required for the gluing of the pallet and thus to limit the temperature rise.
  • the reactivation of the electromagnet usually performed by the main spring acting on the pallet by means of an arm provided for this purpose on the plate, consumes a portion of the energy supplied by the mechanism to achieve the opening of the contacts the associated breaker block.
  • the adaptation of the power characteristic "race / force" of the auxiliary to that resistant circuit breaker is altered because the plate presses on the pallet to close it, which pallet opposes the force of its opening spring.
  • the present invention solves this problem and provides an auxiliary trigger device, simple design, to compensate for the alteration of this characteristic "force / stroke" of the mechanism without degrading the performance of the auxiliary.
  • the present invention relates to a device of the kind mentioned above, this device being characterized in that it comprises means for returning the armature in the second position after a trigger, these means comprising an arm supported by the platinum and a said third spring stretched by the arm of the plate in the armed position of the mechanism, said third said spring being adapted to exert a force on the arm of the plate during its expansion, after unlocking the plate, so as to recall the mobile armature formed by a pallet to the aforementioned second position close to the magnetic circuit.
  • the so-called third spring and the arm of the plate are shaped and arranged in such a way that, at the beginning of triggering, the direction of the initial force applied to the arm of the plate is such that the torque transmitted to the arm of the plate is weak, that during a movement of the arm following the expansion of the spring, the direction of the force of the spring on the arm changes so that the torque transmitted to the arm is amplified in an intermediate phase when the so-called first spring is no longer sufficient to simultaneously supply the minimum driving energy required for unlocking the trip latch of the circuit breaker block and the resetting of the magnetic circuit, and that at the end of tripping the torque transmitted to the arm is low.
  • the so-called third spring is a torsion spring.
  • said third spring has an end bearing on the housing and an end resting on the arm of the plate in an armed position of the mechanism, the two ends of the spring resting on the housing in the tripped position of the mechanism, the change of the fulcrum of the second end of the spring, a position resting on the arm to a position bearing on the housing having been driven by the displacement of the plate during a trigger or else a rest of the joystick.
  • it is a tripping device with no voltage.
  • an auxiliary triggering device D according to a particular embodiment of the invention, in particular an undervoltage release, housed in a modular insulating housing 1 which can be attached to a circuit breaker block (not shown), said triggering device mainly comprising a control mechanism 2 and an electromagnet 3.
  • This control mechanism 2 has a tripping link intended to act on the tripping latch of the associated breaker block.
  • This electromagnet 3 is provided with an excitation coil 4 and a magnetic circuit 5 with a movable armature 6, which can occupy either a first position spaced apart from the magnetic circuit, a position in which said armature is biased under the action a second said return spring 12, a second position close to said circuit by electromagnetic attraction against said spring, during the excitation of the coil.
  • the electromagnet 3 comprises in known manner a magnetic circuit consisting of a magnetic "U" 5 made of ferromagnetic steel, cooperating with a movable armature formed by a pivoting pallet 6 and a coil 4 carried by an insulating carcass.
  • the control mechanism 2 comprises a trigger lever 7 pivotally mounted on a turntable 8.
  • This plate 8 further comprises a hooking lever 9 cooperating on the one hand with the release lever 7 and on the other hand, with a transmission rod 10 coupled to a reset lever 11.
  • the rod 10 acts on the plate 8 by means of the attachment lever 9, which is locked by the release lever 7.
  • a trigger a torque is transmitted to the plate 8 by a so-called first spring 13 reset by the lever 11 after each trip.
  • the spring 13 transmits the energy initially stored during the reset, to the plate 8, which causes the unlocking of the latch of the circuit breaker block, and thereby the opening of the contacts of the associated circuit breaker block.
  • the return to the open position of the lever 11, the rod 10 and the hooking lever 9 is out of sync with the return of the plate 8 and the lever 7.
  • this plate 8 also comprises an arm 8a intended to cooperate with a torsion spring 15, said spring being mounted in compression by its two opposite ends 15a, 15b respectively on two parts of the device housing, in the disarmed state of the mechanism, and having an end 15b brought into abutment on the arm 8a of the plate 8 after triggering by displacement of the plate, so as to exert a force on the plate 8, after a trigger, sufficient to bring the pallet 6 in the aforementioned first position.
  • a torsion spring 15 said spring being mounted in compression by its two opposite ends 15a, 15b respectively on two parts of the device housing, in the disarmed state of the mechanism, and having an end 15b brought into abutment on the arm 8a of the plate 8 after triggering by displacement of the plate, so as to exert a force on the plate 8, after a trigger, sufficient to bring the pallet 6 in the aforementioned first position.
  • the Figures 1 and 2 show the trigger device in the standby state, in which the coil 4 of the electromagnet 3 is undervoltage, the mechanism 2 armed and the circuit breaker block in the closed position.
  • the pallet 6 is permanently attracted in the position in which it is against the magnetic "U” 5 and the actuating lever 16 associated with the pallet 6 does not act on the release lever 7, which positively locks the mechanism 2 in the armed state.
  • the additional spring 15 is supported by one 15a of its branches 15a, 15b, on a stud integral with the housing 1 and the other 15b of its branches, on the arm 8a of the plate 8, which maintains this spring 15 in the armed position thanks to the locking made by the release lever 7 between the handle 11, the rod 10 and the attachment lever 9.
  • this additional spring 15 is stretched by the arm 8a in the spring position of the spring 13.
  • the direction of the initial force F applied to the arm 8a of the plate is such that the torque transmitted to the arm by the additional spring 15 is low, as shown by the small ratio of distances d1 / d2 separating the direction D1 of the force mentioned above, the direction D2 of the straight line passing through the articulation axis X of the plate and parallel to the previous line D1, and the straight line D3 parallel to the two preceding ones passing through the axis of rotation of the spring 15.
  • the presence of a voltage fault across the coil 4 has caused the opening of the magnetic circuit 5 and thus the movement of the pallet 6 in the clockwise direction.
  • the actuating lever 16 associated with the pallet 6 is rotated in the same direction and, by its end portion 16a situated on the side opposite the pallet, actuates the release lever 7.
  • the displacement of the latter causes the locking lever 9 to be unlocked, as shown in FIG. figure 3a from which it follows that the plate 8 and the lever 7 rotate under the effect of the aforementioned main spring 13, this displacement resulting in the unlocking and therefore the opening of the contacts of the associated circuit breaker block.
  • the torque transmitted to the mechanism by the additional spring 15 is the same as in the position of the previous figure, so as not to modify the external trigger characteristics, as represented by the distance d1 equal on the Figures 2 and 4 .
  • the triggering process is at its critical point, the main spring 13 having transferred a large part of its energy, the arm 8a is in interference with the actuating lever 16 itself subjected to the contradictory effect of the spring 12. It is at this moment that the effect of the additional spring 15 produces its greatest torque on the plate 8, this being reflected on the figure 6 by a ratio d1 '/ d2' greater between the direction D1 of the force F, the direction D2 passing through the axis of rotation X of the plate and parallel to D1 and the direction D3 passing through the axis of the spring 15. In this position, the additional torque delivered by the spring 15 compensates for the energy loss involved by the compression of the spring 12.
  • the ratio of the lengths d1 '/ d2' between its own axis, its point of application on the plate 8 and the axis of rotation of the plate 8, tends to maximize its effect at the most critical moment of the triggering process.
  • the torque transmitted by the additional spring 15 begins to decrease until it is reduced at the end of travel of the pallet, position in which the reel 4, if it is crossed again by a normal current, can attract the pallet 6 so as to keep closed the magnetic circuit.
  • the device is in an open position, the contacts of the circuit breaker block being open.
  • the additional spring 15 is prestressing, and its two ends 15a, 15b bear respectively on two parts of the housing. Indeed, during the opening movement of the plate, the arm has moved downwards, which has caused a displacement of the fulcrum of the second end 15b of the additional spring 15, a position in which he was resting on the arm, towards a position in which he is resting on the case. ( fig.9 ).
  • a torsion spring applies a torque to the arm of the plate in addition to the main spring of the mechanism plate.
  • the geometry of the arm and the additional spring and their arrangement is such that the additional torque delivered to the plate of the mechanism is low at the beginning of the opening stroke, so as not to change, thus disrupt or reduce, the external triggering characteristics. , strong at the moment of weakness identified from the mainspring, and weak at the end.
  • the torque transmitted to the plate by the torsion spring is maximum when the energy supplied by the mainspring is no longer sufficient to simultaneously supply the motive power minimum required for unlocking the circuit breaker and resetting the magnetic circuit.
  • the additional energy is maximum when the resistance of the pallet is maximum.
  • the force / displacement characteristic provided by the mechanism at the circuit breaker is only slightly modified.
  • an auxiliary triggering device has been implemented which makes it possible to mechanically close the magnetic circuit of the electromagnet in order to limit the amount of current required for the magnetic bonding of the pallet, the force / displacement characteristic provided by the mechanism. being only slightly modified. This compensates for the loss of motive power without altering the adaptability of the mechanism of the auxiliary to that of the circuit breaker.
  • the effort required to trigger the mechanism is directly related to the driving torque of the main spring. All common parts remain compatible with other auxiliaries. Only the additional spring is added or not, depending on the characteristics of the auxiliary device to be mounted. By removing the spring, the same mechanism can be used for example as a remote trigger. Note that although the embodiment described relates to an auxiliary tripping device with no voltage, the invention is also applicable to any auxiliary trigger device in which it is necessary to bring a pallet in position after a trigger.

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  • Breakers (AREA)

Claims (5)

  1. Hilfsauslöseeinrichtung in einem modularen Isolierstoffgehäuse (1) zum Anbau an einen Leistungsschalterblock, welche Auslöseeinrichtung
    - einen Antriebsmechanismus (2) mit einer Auslöseverbindung, die dazu dient, auf die Auslöseklinke des Leistungsschalterblocks zu wirken, welcher Mechanismus eine mit einem Betätigungshebel (11) gekoppelte Übertragungsstange (10), eine drehbar im Gehäuse gelagerte Platine (8) mit einer lösbaren mechanischen Verbindung zur Übertragungsstange (10) sowie einen Auslösehebel (7) umfasst, der durch einen Elektromagneten (3) angesteuert wird, um im Fehlerfall die Unterbrechung der mechanischen Verbindung und daraus folgend die automatische Auslösung des Mechanismus' unabhängig vom Betätigungshebel (11) sowie die Betätigung der Auslöseklinke des zugeordneten Leistungsschalterblocks zu bewirken, wobei der genannte Mechanismus gegen die Wirkkraft einer sogenannten ersten Rückstellfeder (13) durch den Betätigungshebel (11) in eine Gespanntstellung zurückgeführt wird und die Feder dazu ausgelegt ist, im Auslösefall die Platine (8) in die Entriegelungsstellung des Leistungsschalterblocks zu überführen,
    - sowie einen Elektromagneten mit einer Erregerspule (4) und einem Magnetkreis mit einem beweglichen Anker (6) umfasst, welcher Anker entweder eine erste, vom Magnetkreis zurückgezogene Stellung, in der er durch eine sogenannte zweite Rückstellfeder (12) beaufschlagt wird, oder eine zweite Stellung einnehmen kann, in der er durch elektromagnetische Anziehung nach Erregung der Spule (4) nah an den Magnetkreis herangeführt wird, wobei der genannte Anker (6) mit dem genannten Auslösehebel (7) zusammenwirkt, dadurch gekennzeichnet, dass die Einrichtung Mittel umfasst, um den Anker (6) nach erfolgter Auslösung in die zweite Stellung zurückzuführen, welche Mittel einen an der Platine (8) angebrachten Arm (8a) und eine sogenannte dritte Feder (15) umfassen, die durch den Arm (8a) der Platine (8) in der Gespanntstellung des Mechanismus' gehalten wird, welche sogenannte dritte Feder (15) dazu ausgelegt ist, bei ihrer Entspannung nach Entriegelung der Platine eine Kraft auf den Arm der Platine auszuüben, so dass der als Plättchen (6) ausgebildete bewegliche Anker in Richtung der genannten zweiten, nah am Magnetkreis (5) liegenden Stellung beaufschlagt wird.
  2. Hilfsauslöseeinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die sogenannte dritte Feder (15) und der Arm (8a) der Platine (8) so ausgebildet und angeordnet sind, dass die auf den Arm (8a) der Platine (8) wirkende Anfangskraft F zu Beginn der Auslösung so gerichtet ist, dass ein kleines Kraftmoment auf den Arm der Platine wirkt, dass sich die Richtung der auf den Arm wirkenden Federkraft im Verlauf der Bewegung des Arms nach Entspannung der Feder (15) so ändert, dass das auf den Arm wirkende Kraftmoment in einer Zwischenphase verstärkt wird, in der die Kraft der sogenannten ersten Feder nicht mehr ausreicht, um gleichzeitig die zur Entriegelung der Auslöseklinke des Leistungsschalterblocks und zur Rückstellung des Magnetkreises erforderliche Mindestenergie zu liefern, und dass am Ende des Auslösevorgangs das auf den Arm wirkende Kraftmoment klein ist.
  3. Hilfsauslöseeinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die sogenannte dritte Feder (15) als Drehfeder ausgebildet ist.
  4. Hilfsauslöseeinrichtung nach Anspruch 3, dadurch gekennzeichnet, dass sich in einer Gespanntststellung des Mechanismus' ein Ende (15a) der sogenannten dritten Feder (15) am Gehäuse (1) und ein Ende (15b) am Arm (8a) der Platine (8) abstützt, wobei sich in der Ausgelöststellung des Mechanismus' beide Enden (15a, 15b) der Feder (15) am Gehäuse (1) abstützen und bei einer Auslösung oder Überführung in die Ruhestellung mithilfe des Betätigungshebels der Übergang des zweiten Endes (15b) der Feder von einer Stellung mit Abstützung am Arm (8a) in eine Stellung mit Abstützung am Gehäuse (1) durch Drehung der Platine bewirkt wird.
  5. Hilfsauslöseeinrichtung nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Einrichtung als Auslöseeinrichtung mit Unterspannungsauslöser ausgebildet ist.
EP20110354005 2010-06-15 2011-03-15 Hilfsauslösevorrichtung zur Verwendung in einem Auslöseblock Active EP2398034B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002524A FR2961343B1 (fr) 2010-06-15 2010-06-15 Dispositif de declenchement auxiliaire destine a etre associe a un bloc disjoncteur.

Publications (2)

Publication Number Publication Date
EP2398034A1 EP2398034A1 (de) 2011-12-21
EP2398034B1 true EP2398034B1 (de) 2013-05-08

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EP20110354005 Active EP2398034B1 (de) 2010-06-15 2011-03-15 Hilfsauslösevorrichtung zur Verwendung in einem Auslöseblock

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EP (1) EP2398034B1 (de)
CN (1) CN102290295B (de)
ES (1) ES2409304T3 (de)
FR (1) FR2961343B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110299271B (zh) * 2019-07-05 2024-06-04 苏州未来电器股份有限公司 一种双稳态电磁机构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4625190A (en) * 1985-03-04 1986-11-25 Westinghouse Electric Corp. Remotely controlled solenoid operated circuit breaker
FR2589627B1 (fr) * 1985-10-31 1988-08-26 Merlin Gerin Mecanisme de commande pour disjoncteur electrique a basse tension
US4983939A (en) * 1989-10-05 1991-01-08 Westinghouse Electric Corp. Circuit breaker with adjustable low magnetic trip
ATE209828T1 (de) * 1996-06-10 2001-12-15 Siemens Ag Unterspannungsauslöser
FR2779568B1 (fr) * 1998-06-04 2000-07-13 Schneider Electric Ind Sa Dispositif de coupure electrique comprenant un dispositif de declenchement differentiel et disjoncteur comprenant un tel dispositif
DE102006027140A1 (de) * 2006-06-12 2007-12-13 Ellenberger & Poensgen Gmbh Schutzschalter

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Publication number Publication date
CN102290295B (zh) 2015-03-25
FR2961343B1 (fr) 2012-06-08
EP2398034A1 (de) 2011-12-21
FR2961343A1 (fr) 2011-12-16
ES2409304T3 (es) 2013-06-26
CN102290295A (zh) 2011-12-21

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