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EP0926693B1 - Selektiver Auslöser für Leistungsschalter - Google Patents

Selektiver Auslöser für Leistungsschalter Download PDF

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Publication number
EP0926693B1
EP0926693B1 EP98410144A EP98410144A EP0926693B1 EP 0926693 B1 EP0926693 B1 EP 0926693B1 EP 98410144 A EP98410144 A EP 98410144A EP 98410144 A EP98410144 A EP 98410144A EP 0926693 B1 EP0926693 B1 EP 0926693B1
Authority
EP
European Patent Office
Prior art keywords
threshold
blade
tripping
lever
support element
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
EP98410144A
Other languages
English (en)
French (fr)
Other versions
EP0926693A1 (de
Inventor
Xavier Herreros
Michel Lazareth
Alain Menier
Jean-Claude Ramirez
Philippe Schuster
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 Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP0926693A1 publication Critical patent/EP0926693A1/de
Application granted granted Critical
Publication of EP0926693B1 publication Critical patent/EP0926693B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H01H71/446—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay making use of an inertia mass
    • 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
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker
    • 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
    • H01H71/34—Electromagnetic mechanisms having two or more armatures controlled by a common winding

Definitions

  • the invention relates to a selective tripping device associated with a control mechanism of an electric circuit breaker, according to the preamble of claim 1.
  • the selectivity of protections in electrical networks can be total or partial to guarantee users the best availability of energy.
  • total selectivity the occurrence of a fault current from the overload to the free short circuit causes the nearest upstream circuit breaker to open, while the main circuit breaker remains closed.
  • partial selectivity the above condition is not satisfied up to the maximum short-circuit current, but up to a lower value, called the selectivity limit.
  • Each of the documents FR-A-796774 and DE 1041585 discloses a circuit breaker having an electromagnetic actuator equipped with two armatures movable independently of one another.
  • One of the armatures is coupled to a delay device to cause the delayed trip in the presence of a long-term overload current.
  • the other armature causes an instantaneous trip in the presence of a short circuit current.
  • the two movable armatures are mounted on a common pivot.
  • FR2.353.980 discloses a selective trigger equipped with an electromagnetic actuator causing delayed tripping of the circuit breaker mechanism when two successive current waves of intensity higher than a predetermined threshold occur. Another rapid tripping can occur in case of a short-circuit to allow instantaneous tripping of the circuit-breaker when the current exceeds the second threshold.
  • Such a tripping device is conventionally used in large-sized industrial circuit breakers.
  • an optical fiber placed in the vicinity of the contacts allows in the event of repulsion, an instantaneous detection of the arc to cause the immediate tripping of the circuit breaker in the presence of the fault current.
  • the object of the invention is to provide a selective tripping device with high performance electromagnetic actuator.
  • the triggering device according to the invention is characterized by the characterizing part of claim 1.
  • the weight of the retarding system is carried by a support lever mounted pivotally limited on an axis, and comprising a hooking stop for stopping at the first half-wave of the current, the control lever in an intermediate position of the first pallet, the appearance of the next half wave causing the release of the attachment stop for the continued movement of the first pallet to the attracted position causing the delayed triggering by the engagement of the actuating pusher against the trigger lever of the mechanism.
  • the active end of the striker member of the second tripping subassembly comprises a projecting portion disposed opposite the triggering lever, and a recessed portion facing the movable contact arm, the detection of the second repulsion threshold by the attraction of the second pallet neutralizing the selectivity, with an instantaneous triggering of the mechanism.
  • the detection of the repulsion threshold by the attraction of the second pallet neutralizes the selectivity because the triggering becomes instantaneous.
  • the selectivity is partial because it is only operational between the first magnetic threshold and the second repulsion threshold.
  • the striker member is devoid of the protruding part by acting exclusively on the contact arm during the appearance of the first half-wave, the triggering of the intervening mechanism by means of the actuating pusher during the appearance of the second half-wave.
  • the selectivity is in this case total.
  • a circuit breaker 10 housed in a housing 11 of molded insulating material comprises a fixed contact 12. a movable contact 14 carried by a pivoting contact arm 16, a control mechanism 18 associated with a controller 20 manual actuation and automatic fault triggering means, and an extinction chamber 22 with 24 deionization plates for extinguishing the arc drawn between the contacts 12, 14 during their separation.
  • the control mechanism 18 is for example of the type described in the document EP-A295 158, and comprises a release lever 26 cooperating with a detent lever 28 connected to the handle 20 by a transmission rod 30.
  • the contact arm 16 is carried by a movable plate 32 rotatable between a closed position and an open position of the contacts 12, 14.
  • the tripping means of the circuit breaker 10 comprise a selective tripping device, designated by the general reference 34, and constituted by an electromagnetic actuator 36, provided with a fixed magnetic circuit 38, and two movable pallets 42.
  • the excitation of the actuator 36 results from the passage of the current in a conductor 44 of the main circuit causing a magnetic field in the air gap 45 of the magnetic circuit 38 located opposite two separate pallets 42.
  • the conductor 44 carries the fixed contact 12 at one end, and is connected to a connection pad 43 at its opposite end.
  • the first upper pallet 40 of the actuator 36 is part of a first delayed release subassembly 46, comprising an actuating pusher 48 secured to a first support element 50 of the pallet 40.
  • support member 50 is pivotally mounted on a hinge axis 52, and a first return spring 54 is associated with a control link 56 for biasing the first pallet 40 to a rest position when the pulling force exerted by the magnetic circuit 38 is less than the restoring force of the spring 54.
  • a control lever 58 of the first support member 50 situated opposite the pallet 40 cooperates with a retarder system 60 with a weight 62, which is carried by a support lever 64 pivotally mounted limited on an axis 66.
  • the support lever 64 is equipped with an attachment stop 68 intended to come into engagement with the control lever 58, and a double spring 70 having two strands 70a, 70b of different lengths.
  • the delaying system 60 is arranged between the quenching chamber 22 and the conductor 44, which bears against a small lateral face of the casing 11 (FIG. 1).
  • the second lower pallet 42 of the actuator 36 is part of a second instantaneous trigger subassembly 76, provided with a striker member 78 fixed to a second support element 80 of the pallet 42.
  • second support member 80 is hinged on an axis 82, and is associated with a second return spring 84 biasing the second pallet 42 to the discarded position during normal operation of the circuit breaker 10.
  • the active end of the striker member 78 of the second trigger subassembly 76 is subdivided transversely into two portions 72, 74 (FIG. 2) spaced from one another by a longitudinal offset extending in the direction moving the striker member 78 following the attraction of the second pallet 42.
  • the protruding portion 72 is disposed opposite a branch of the trigger lever 26 of the mechanism 18, while the other part 74 recessed is located in front of the inner edge of the contact arm 16.
  • the actuating pusher 48 and the striker member 78 are arranged side by side, and move in the same direction, while the pivoting of the support elements 50, 80 is carried out in the opposite direction when the attraction of their pallets 40, 42 respectively.
  • FIGS. 5 to 11 The operation of the selective tripping device 34 according to the invention is illustrated in FIGS. 5 to 11, in which, for the sake of clarity, the actuating power 48 has been deliberately shifted from the plane of the housing of the striker member 78.
  • the electromagnetic attraction forces in the inlet 45 are lower than the restoring forces of the two threshold springs 54, 84 , which hold the two pallets 40, 42 in the spaced apart position of the pole faces of the magnetic circuit 38.
  • the actuator 36 is in an inactive state, and the double spring 70 biases the support lever 64 of the retarder system 60 in a position of equilibrium .
  • the appearance of a circuit current generates attraction forces in the gap 45 of the actuator 36 which depend on the intensity of the short-circuit current.
  • the setting of the springs 54, 84 is calculated so that the actuator 36 of the selective trip device 34 remains inactive when the value of the peak current is less than 7.5 ln.
  • the first spring of the threshold 54 of the first delayed tripping subassembly 46 is set to 7.5 In corresponding to the magnetic tripping threshold.
  • the second threshold spring 84 of the second instantaneous trigger subassembly 76 is set to 17In corresponding to the repulsion threshold of the contacts 12, 14 of the apparatus.
  • the repulsion threshold is of the order of 3000A.
  • FIG. 5 shows the normal operation of the circuit breaker 10 where the two vanes 40, 42 are not attracted against the magnetic circuit 38 of the actuator 36, and are held in the spaced position.
  • the actuating pusher 48 and the striker member 78 remain stationary in the rest position. Continuity of service is provided, with no trigger mechanism 18, and maintaining the movable contact 14 in the closed position.
  • This current page corresponds to the active selectivity zone whose operating phases are represented in FIGS. 6 to 8.
  • the actuating pusher 48 does not come into contact with the release lever 26, which remains in the armed position. This attraction of the first pallet 40 occurs during the rising edge of the first sine half wave.
  • the electromagnetic force in the air gap 45 decreases, and the first threshold spring 54 causes the pallet 40 to return to the remote initial position (FIG. 7).
  • the support lever 64 pivots slightly in the direction of clockwise, and causes a load shedding of the hooking pressure of the control lever 58 in the stop 68.
  • the pallet 40 remains in the initial position without triggering the mechanism 18.
  • the electromagnetic force in the gap 45 increases, and the first pallet 40 is again attracted in the direction of arrow F1 ( Figure 8).
  • the first support member 50 pivots about the axis 52, and the control lever 58 released from the engagement stopper 68, drives the support lever 64 in rotation about the axis 66, allowing the continuation of the movement of attraction of the pallet 40 to the attracted position.
  • the actuating pusher 48 acts on the release lever 26 to unlock the mechanism 18 causing the pivoting of the contact arms 16 and the opening of the movable contact 14.
  • the delaying system 60 then returns to the initial position of FIG. the action of the potential energy stored by the short run 70a of the double spring 70.
  • the striker member 78 acts on the release lever 26 to unlock the mechanism 18, and simultaneously hits the contact arm 16, which is rapidly driven to the open position ( Figure 10).
  • the movable contact 14 is completely open, and the pallets 40, 42 return to their initial position, as is the support lever 64 of the flyweight 62 (FIG. 11).
  • the trigger mechanism 18 can thus intervene by one of the two trigger subassemblies 46, 76 which are independent of one another, one being delayed by the delay system 60 when the current exceeds the magnetic threshold and the other being instantaneous when the current exceeds the repulsion threshold.
  • the detection of the repulsion threshold by the attraction of the second pallet 42 thus neutralizes the selectivity, since the triggering becomes instantaneous.
  • the selectivity is only operational between the magnetic threshold and the repulsion threshold. Such operation of the triggering device 34 makes it possible to obtain a partial selectivity.
  • the projecting portion 72 of the striker member 78 of the second trigger subassembly 76 is eliminated, so as to constitute a straight edge in alignment with the other part. 74.
  • the striker member 78 no longer acts on the trigger lever 26, but only on the contact arm 16 as a striker. If the short-circuit current persists after the first half-wave, the actuating pusher 48 will trigger the mechanism 18 as in the case of the partial selectivity previously described.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Cookers (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Circuit Breakers (AREA)
  • Keying Circuit Devices (AREA)

Claims (4)

  1. Selektive Auslöseeinrichtung (34), die einem Schaltmechanismus (18) eines elektrischen Leistungsschalters zugeordnet ist und ein elektromagnetisches Betätigungsorgan (36) mit Magnetkreis (38) umfasst, das
    - einen ersten beweglichen Magnetanker (40), welcher dazu dient, mit einem Zeitverzögerungsmechanismus (60) zusammenzuwirken, um eine verzögerte Auslösung zu gewährleisten, wenn der Strom einen ersten magnetischen Ansprechwert überschreitet, wobei
    - der erste Magnetanker (40) an einen Betätigungsstößel (48) gekoppelt und fest mit einem ersten Stützelement (50) verbunden ist, das schwenkbar auf einer ersten Gelenkachse (52) gelagert ist,
    - dem ersten Magnetanker (40) eine erste Rückstellfeder (54) zugeordnet ist, um den ersten, magnetischen Ansprechwert einer ersten Auslösebaugruppe (46) zu definieren,
    - und einen zweiten beweglichen Magnetanker (42) umfasst, der dazu dient, eine unverzögerte Auslösung zu gewährleisten, wenn der Strom einen zweiten magnetischen Ansprechwert überschreitet, der über dem ersten Ansprechwert liegt, wobei
    - der zweite Magnetanker (42) zur Bildung von zweiten, unverzögerten Auslösemitteln einer zweiten Auslösebaugruppe (76) des Mechanismus' (18) an eine Schlageinrichtung (78) gekoppelt ist,
    - dem zweiten Magnetanker (42) zur Definition des genannten zweiten Ansprechwerts eine zweite Rückstellfeder (84) zugeordnet ist,
    - wobei der genannte zweite Ansprechwert dem Rückprallschwellwert der Kontakte (12, 14) entspricht, derart dass eine Teilselektivität zwischen dem ersten Ansprechwert und dem zweiten Ansprechwert bzw. eine volle Selektivität oberhalb des zweiten Ansprechwerts erzielt wird,
    dadurch gekennzeichnet, dass
    - das erste Stützelement (50) einen Steuerhebel (58) umfasst,
    - das Zeitverzögerungssystem (60) einen Fliehkörper (62) umfasst, der auf einem Trägerhebel (64) montiert ist, welcher begrenzt drehbar auf einer dritten Achse (66) gelagert ist und einen Rastanschlag (68) umfasst, der dazu dient, bei der ersten Stromhalbwelle den Steuerhebel (58) in einer Zwischenstellung des ersten Magnetankers (40) anzuhalten, wobei die nachfolgende zweite Stromhalbwelle die Freigabe des Rastanschlags (68) bewirkt, so dass erste Magnetanker (40) seine Bewegung fortsetzen kann und so zeitverzögerte Auslösung bewirkt, indem der Betätigungsstößel (48) in Anschlag gegen den Auslösehebel (26) des Mechanismus' (18) gelangt,
    - der zweite Magnetanker (42) an einem zweiten Stützelement (80) befestigt ist, welches an eine zweite Achse (82) angelenkt ist und die genannte, neben dem Betätigungsstößel (48) angeordnete Schlageinrichtung (78) trägt.
  2. Selektive Auslöseeinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass beim Anzug des jeweiligen Magnetankers (40, 42) das erste Stützelement (50) in entgegengesetzter Richtung verschwenkt wie das zweite Stützelement (80).
  3. Selektive Auslöseeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Wirkende der Schlageinrichtung (78) der zweiten Auslösebaugruppe (76) einen, dem Auslösehebel (26) gegenüber liegenden, hervorstehenden Abschnitt (72) sowie einen, dem beweglichen Kontaktarm (16) gegenüber liegenden eingezogenen Abschnitt (74) umfasst, wobei die Detektion des zweiten Rückprallschwellwerts durch Anzug des zweiten Magnetankers (42) die Selektivität aufhebt und eine unverzögerte Auslösung des Mechanismus' bewirkt.
  4. Selektive Auslöseeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Schlageinrichtung (78) keinen hervorstehenden Abschnitt (72) aufweist und bei Auftreten der ersten Halbwelle ausschließlich auf den Kontaktarm (16) wirkt, wobei die Auslösung des Mechanismus' bei Auftreten der zweiten Halbwelle durch den Betätigungsstößel (48) erfolgt.
EP98410144A 1997-12-24 1998-12-09 Selektiver Auslöser für Leistungsschalter Expired - Lifetime EP0926693B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9716725 1997-12-24
FR9716725A FR2772981B1 (fr) 1997-12-24 1997-12-24 Dispositif de declenchement selectif pour disjoncteur

Publications (2)

Publication Number Publication Date
EP0926693A1 EP0926693A1 (de) 1999-06-30
EP0926693B1 true EP0926693B1 (de) 2006-03-01

Family

ID=9515316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98410144A Expired - Lifetime EP0926693B1 (de) 1997-12-24 1998-12-09 Selektiver Auslöser für Leistungsschalter

Country Status (4)

Country Link
EP (1) EP0926693B1 (de)
AT (1) ATE319183T1 (de)
DE (1) DE69833637T2 (de)
FR (1) FR2772981B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9355803B2 (en) 2012-12-03 2016-05-31 Schneider Electric Industries Sas Actuator with thermomagnetic shunt, especially for triggering a circuit breaker

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2980910B1 (fr) * 2011-09-30 2013-09-06 Schneider Electric Ind Sas Dispositif de declenchement pour disjoncteur et disjoncteur comportant un tel dispositif
FR3028349B1 (fr) 2014-11-12 2016-12-30 Schneider Electric Ind Sas Actionneur electromagnetique et disjoncteur comprenant un tel actionneur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR796774A (fr) * 1935-10-15 1936-04-15 Stotz Kontakt Gmbh Disjoncteur automatique électromagnétique
DE1041585B (de) * 1955-08-27 1958-10-23 Siemens Ag Elektrischer Schalter mit magnetischer UEberstromausloesung
US3497838A (en) * 1968-04-22 1970-02-24 Airpax Electronics Circuit breaker having inertial delay
CH672036A5 (de) * 1986-12-23 1989-10-13 Sprecher & Schuh Ag
FR2616583B1 (fr) * 1987-06-09 1995-01-06 Merlin Gerin Mecanisme de commande d'un disjoncteur electrique miniature
ZA936632B (en) * 1992-09-14 1994-03-30 Circuit Breaker Ind An electro-magnetic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9355803B2 (en) 2012-12-03 2016-05-31 Schneider Electric Industries Sas Actuator with thermomagnetic shunt, especially for triggering a circuit breaker

Also Published As

Publication number Publication date
DE69833637D1 (de) 2006-04-27
EP0926693A1 (de) 1999-06-30
ATE319183T1 (de) 2006-03-15
DE69833637T2 (de) 2006-10-12
FR2772981A1 (fr) 1999-06-25
FR2772981B1 (fr) 2000-01-21

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