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EP1266389B1 - Declencheur combine pour un disjoncteur - Google Patents

Declencheur combine pour un disjoncteur Download PDF

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Publication number
EP1266389B1
EP1266389B1 EP01931535A EP01931535A EP1266389B1 EP 1266389 B1 EP1266389 B1 EP 1266389B1 EP 01931535 A EP01931535 A EP 01931535A EP 01931535 A EP01931535 A EP 01931535A EP 1266389 B1 EP1266389 B1 EP 1266389B1
Authority
EP
European Patent Office
Prior art keywords
lever
circuit breaker
accordance
tripping
blow
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
EP01931535A
Other languages
German (de)
English (en)
Other versions
EP1266389A1 (fr
Inventor
Walter Felden
Matthias Reichard
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.)
AEG Niederspannungstechnik GmbH and Co KG
Original Assignee
AEG Niederspannungstechnik GmbH and Co KG
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 AEG Niederspannungstechnik GmbH and Co KG filed Critical AEG Niederspannungstechnik GmbH and Co KG
Publication of EP1266389A1 publication Critical patent/EP1266389A1/fr
Application granted granted Critical
Publication of EP1266389B1 publication Critical patent/EP1266389B1/fr
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
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a combined tripping device for a circuit breaker.
  • a trip device which uses a magnetic system.
  • a magnetic field is generated with the current to be monitored, which exerts a magnetic force on an armature.
  • the armature moves to a release position and actuates a cut-off device which disconnects the contacts of the circuit breaker.
  • circuit breakers equipped with contacts for rapid shutdown by electrodynamic repulsion in the event of a short circuit.
  • quick shutdown creates an arc drawn between the contacts, which causes a rapid increase in pressure in the housing receiving the contacts.
  • the housing With the housing is a pressure chamber connected, which is closed by a movable piston. Following the increase in pressure in the housing and the pressure chamber, the piston is displaced and acts on exceeding a predetermined pressure on a turn-off, which turns off the circuit breaker.
  • a circuit breaker which has a rotatable lever with a lever arm which is associated with a magnet system.
  • the lever arm has further formed in its the pivot point of the lever facing away from a storage surface, which projects into a blow-out, which is associated with a splitter stack.
  • the invention has for its object to provide a reliable tripping device for circuit breakers, the combined pressure surge and / or magnetic release with little effort to different tripping forces and conditions is adaptable.
  • Fig. 1 shows a perspective view of a circuit breaker assembly 1, which with a Shutdown device 40 and a generally designated 20 triggering device is provided.
  • the circuit breaker assembly has a housing 50 to which the shutdown device 40 and the trip device 20 are attached.
  • the shutdown device 40 and the triggering device 20 are operatively connected via a tripping shaft 2.
  • An actuation of the trip shaft 2 triggers the shutdown device 40, which interrupts the circuit to be switched.
  • the shut-off device also has a mechanism that allows the contacts to be closed again after the circuit breaker has tripped and the cause for tripping has been removed.
  • Fig. 3 shows the housing 50, which is assembled from two housing halves.
  • the housing 50 encloses a cavity in which the electrical elements 30, 32, 34, 28 of the circuit breaker are accommodated.
  • the housing has various bearing points for elements to be stored, which will be explained later.
  • Generally means mounted on the housing in the following description that corresponding bearing pins, openings etc. are formed on the housing.
  • the housing is made of an insulating material, preferably made of a plastic.
  • the circuit breaker has a housing on which the triggering device is mounted (right side in Fig. 3). In the case is a arranged on a rotor rotatably held contact bridge 32 which is rotatable clockwise and counterclockwise.
  • the contact bridge has movable contacts 30 at its two ends, which can interact with fixed contacts 34.
  • the contact bridge contrary to the illustration in FIG. 3, is rotated by approximately 90 ° in the counterclockwise direction, so that the movable contact 30 is in contact with the fixed contact 34.
  • a current conductor (not shown) is provided which also has a fixed contact which is in abutment with the other movable contact of the contact bridge 32 when the aforementioned contacts 30, 34 are closed.
  • the current to be switched by the power switch consequently flows through the contact bridge 32.
  • Fig. 3 shows a triggering shaft 2 at the top right, which cooperates with a shutdown, not shown, which will be explained later. It can be seen that on the trip shaft 2 of the triggering device, a stop 16 is formed, which may lie in the path of movement of a lever 6 of the triggering device. The function of the triggering device will be explained later.
  • each contact pair is associated with an arc quenching chamber 28.
  • the arc quenching chamber is provided with suitable plates (Dioneblechen), which are substantially parallel are arranged to each other in the chamber and are denoted by 282 in Fig. 3.
  • the rotor or the contact bridge 32 are loaded by springs in the respective end position, i. E. during rotation, the rotor exceeds a point of greatest spring deflection, resulting in a bistable configuration.
  • the contact bridge 32 is held by spring force in the closed position or in the open position. This is important for the function of the circuit breaker in that, when an overcurrent occurs, a separation of the contacts can take place from one another, as will be explained later.
  • the switch-off process will now be explained in more detail in anticipation of FIG.
  • the shut-off device (not shown) forms a latch mechanism, a switch lock or the like, which can rotate the rotatable contact bridge 32 in the case of release clockwise.
  • the triggered condition is shown in FIG.
  • the triggering device 20 has in addition to the trip shaft 2, a current conductor 14 encompassing yoke 8, the legs of which are facing an armature or lever 6.
  • the lever 6 is rotatably mounted about a pivot point 12. As can be clearly seen in Fig. 2, the lever 6 is extended beyond the pivot point 12 and forms a storage area 10.
  • the storage area is associated with a blow-out 26, which will be explained later.
  • Fig. 2 shows a bimetallic element 18 which is arranged substantially parallel to a vertical in Fig. 2 portion of the current conductor 14 and can engage with a projection 22 of the trip shaft 2 in engagement.
  • Fig. 3 starting from the closed state of the contacts 30, 34, the trip operation will be explained.
  • a current flowing through the current conductor 14 generates a magnetic field around the current conductor, which is directed and amplified by the yoke 8, so that a magnetic force in the direction of the arrow A is exerted on the lever 6.
  • the lever 6 If the current in the current conductor 14 exceeds a predetermined value, the lever 6 is deflected against the force of the spring 24 by the magnetic force between the yoke and lever 6 so far that it abuts against the stop 16 of the trip shaft 2. This causes rotation of the trip shaft 2, which triggers the shutdown device 40 ( Figures 1 and 2) and shuts off the power switch as previously described.
  • the contacts 30, 34 are pressed apart directly by electrodynamic repulsion.
  • the electrodynamic repulsion is carried out by the magnetic fields around the current conductor 14 (lower horizontal section) and arranged parallel to the conductor 14 contact bridge 32 when the fixed contact 34 and the movable contact 30 are closed at the contact bridge 32.
  • current conductor 14 and contact bridge 32 current conductor 14 and contact bridge 32
  • Around the conductors arise magnetic fields in the same direction, which repel each other.
  • the closing force is applied by a spring mechanism.
  • the contact bridge 32 is turned a little clockwise. In this case, an arc is spanned between the contacts 30, 34, which bridges the gap formed between the contacts.
  • Each contact pair 30, 34 is associated with an arc quenching chamber 28 to prevent excessive propagation of the arc, or to delete this quickly.
  • the pressure of the air or the gas in the quenching chamber 28 is abruptly increased (about 0.5 ms).
  • the pressure in the arc quenching chamber 28 can be released through the exhaust duct 26 to the environment. This pressure reduction takes place by a pressure surge (arrow P) or a pressure wave, which passes through the blow-out 26 very quickly.
  • the storage area 10 of the lever 6 is arranged in the exhaust passage 26 and is acted upon by the pressure surge.
  • the kinetic energy of the pressure wave, i. of the medium flowing in the blow-out channel 26 is converted into a dynamic pressure on the side of the storage surface 10 facing the arc-quenching chamber 28.
  • the standard pressure is higher than the prevailing on the back of the storage area 10 static pressure. Following a force generated by this pressure difference (arrow B) on the storage surface 10, the lever 6 is deflected in the release direction.
  • the storage area can also be arranged outside the discharge channel in the vicinity of the outlet opening. It is sufficient if the pressure wave hits the storage area with sufficient speed.
  • the two aforementioned triggering or tripping forces occur simultaneously, so that the triggering is additionally supported by the force acting between the lever 6 and yoke 8 magnetic force by the release force due to the pressure surge on the storage area 10 of the lever 6.
  • the opposite forces (arrows A and B) act on two different sides of the pivot point 12 on the lever 6 and add up to a total moment about the pivot point 12, which is available for the deflection of the lever. This increases the torque available to overcome the moment of inertia of the lever that increases with the faster movement of the lever.
  • the circuit breaker or circuit breaker assembly shown in FIGS. 1 to 3 further has an overload protection provided with a bimetallic element 18.
  • the bimetallic element 18 is arranged parallel to a vertical in Fig. 2 section of the current conductor 14 as shown in FIG. If a current (overload) is constantly flowing through the current conductor 14, which is too low to initiate the magnetic or the combined triggering of magnetic release and pressure surge, but is higher than the desired current, the conductor 14 is gradually heated.
  • the heated conductor 14 outputs a portion of its heat to the bimetallic element 18 arranged closely next to it.
  • the bimetallic element 18 heated in this way bends to the left in FIG. 2 and actuates the triggering shaft 2 by means of the projection 22 in the triggering direction.
  • FIG. 4 A modified form of the triggering device is shown in FIG.
  • the same reference numerals designate functionally identical parts or elements as in FIGS. 1 to 3.
  • the modification shown in FIG. 4 differs from the preceding triggering device only by another form of heating of the bimetal element 18.
  • the external conductor or the terminal 38 is connected to the bimetallic element 18 via a line 36.
  • the bimetallic element 18 is electrically connected to the current conductor 14 in the region of its lower end in FIG. 4.
  • the current conductor 14 passes through the yoke 8 and operates in the same manner as previously described in detail with reference to FIGS. 1 to 3.
  • the bimetal element 18 is traversed by the current to be monitored and is heated directly by this stream.
  • the current through the bimetallic element becomes too large, the temperature of the bimetal element exceeds the tripping value and the bimetallic element 18 bends to rotate the tripping shaft 2 to trip the tripping device 40.
  • steel dion plates 282 are disposed to extinguish the arc.
  • the plates 282 are arranged parallel to each other obliquely in the housing and thus serve to better guide the expanding by the arc gases in the direction of the exhaust passage 26.
  • the effect of the pressure wave or the pressure surge can be amplified.
  • the driver portion of the lever 6 and the stopper 16 allow actuation of the trip shaft 2 in the release direction regardless of a movement of the lever 6.
  • another type of triggering for example by the bimetal 18 without affecting the rest of the triggering device.
  • suitable means drag lever and viewing window or the like
  • the storage area is formed by simply extending the lever 6 beyond the fulcrum 12 addition.
  • the triggering device can be achieved by a simple design measure, without increasing the number of components.
  • the storage area may be designed as a flap closing the blow-off channel, which prevents the ingress of foreign materials.
  • a multi-pole circuit breaker can be realized by a parallel arrangement of a corresponding number of circuit breaker assemblies, wherein the shutdown device can be associated with one, several or all poles.
  • the tripping shaft may be configured to switch off only one pole, multiple poles or all poles with a tripping device.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Toys (AREA)
  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (13)

  1. Disjoncteur de puissance (1) comprenant :
    - dans un boîtier (50) des contacts (30, 34) qui peuvent être séparés par le déclenchement d'un dispositif de coupure (40),
    - dans le boîtier (50), un canal de soufflage (26) associé au contact (30, 34), avec un déclencheur (20) comportant un levier (6) qui est monté pivotant autour d'un point de rotation (12) et en liaison active avec le dispositif de coupure,
    - un système magnétique (8, 14) agissant sur le levier (6) en le déviant pour déclencher le dispositif de coupure (40),
    - une surface de barrage (10) réalisée sur le levier (6), qui est associée au canal de soufflage (26) et qui assiste le mouvement de basculement du levier (6) faisant suite à un coup de pression se produisant dans le canal de soufflage (26),
    caractérisé en ce que le point de rotation (12) du levier (6) se trouve entre un premier bras de levier actionnable par le système magnétique (8, 14) et un second bras de levier qui peut être actionné par le coup de pression et qui porte la surface de barrage (10).
  2. Disjoncteur de puissance selon la revendication 1, caractérisé en ce que la surface de barrage (10) constitue le second bras du levier (6).
  3. Disjoncteur de puissance selon la revendication 1 ou 2, caractérisé en ce que le levier (6) est monté en face d'une culasse (8) appartenant au système magnétique et qui tire le levier (6) en cas de déclenchement.
  4. Disjoncteur de puissance selon la revendication 3, caractérisé en ce que la culasse (8) entoure un conducteur qui amène le courant aux contacts (30, 34) du disjoncteur de puissance (1).
  5. Disjoncteur de puissance selon une des revendications 1 à 4, caractérisé en ce que le levier (6) est en liaison active avec un arbre de déclenchement (2) servant à actionner le dispositif de déclenchement (40) par l'intermédiaire d'un mécanisme d'entraînement (16) qui autorise un mouvement de déclenchement de l'arbre (2) indépendamment du mouvement du levier (6).
  6. Disjoncteur de puissance selon la revendication 5, caractérisé en ce que le mécanisme d'entraînement comporte une butée (16) à actionner dans le sens de déclenchement de l'arbre (2).
  7. Disjoncteur de puissance selon la revendication 5 ou 6, caractérisé en ce que le mécanisme d'entraînement est disposé à une extrémité du premier bras de levier.
  8. Disjoncteur de puissance selon une des revendications 1 à 7, caractérisé en ce que le levier (6) est en liaison active avec un élément élastique (24) qui précontraint le levier (6) en direction de sa position de repos.
  9. Disjoncteur de puissance selon la revendication 8, caractérisé en ce que la portée de barrage (10) est disposée dans le canal de soufflage (6) dont il obstrue au moins en partie la section.
  10. Disjoncteur de puissance selon la revendication 8, caractérisé en ce que la portée de barrage (10) se trouve à l'extérieur du canal de soufflage (6) et à proximité de l'ouverture de sortie de celui-ci.
  11. Disjoncteur de puissance selon la revendication 4, caractérisé en ce que le conducteur de courant (14) est à proximité directe d'un bilame (18) qui est en liaison active avec l'arbre de déclenchement (2).
  12. Disjoncteur de puissance selon la revendication 4, caractérisé en ce que le conducteur de courant (14) est constitué par un bilame (18) qui est en liaison active avec l'arbre de déclenchement (2).
  13. Disjoncteur de puissance selon une des revendications précédentes, caractérisé en ce que le canal de soufflage (26) est relié à une chambre de soufflage d'arc (28).
EP01931535A 2000-03-17 2001-03-16 Declencheur combine pour un disjoncteur Expired - Lifetime EP1266389B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10013161 2000-03-17
DE10013161A DE10013161B4 (de) 2000-03-17 2000-03-17 Kombinierte Auslösevorrichtung für einen Leistungsschalter
PCT/EP2001/003036 WO2001069637A1 (fr) 2000-03-17 2001-03-16 Declencheur combine pour un disjoncteur

Publications (2)

Publication Number Publication Date
EP1266389A1 EP1266389A1 (fr) 2002-12-18
EP1266389B1 true EP1266389B1 (fr) 2007-05-16

Family

ID=7635200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01931535A Expired - Lifetime EP1266389B1 (fr) 2000-03-17 2001-03-16 Declencheur combine pour un disjoncteur

Country Status (7)

Country Link
US (1) US20010045879A1 (fr)
EP (1) EP1266389B1 (fr)
AT (1) ATE362646T1 (fr)
DE (2) DE10013161B4 (fr)
ES (1) ES2284645T3 (fr)
PL (1) PL198622B1 (fr)
WO (1) WO2001069637A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2844915B1 (fr) * 2002-09-19 2005-05-06 Schneider Electric Ind Sa Dispositif de declenchement pour appareil electrique interrupteur
US20090115556A1 (en) * 2007-11-05 2009-05-07 Square D Company Divided adjustable armature for a circuit breaker
DE102009015222A1 (de) 2009-03-31 2010-10-07 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102009015126A1 (de) 2009-03-31 2010-10-14 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102010040947A1 (de) * 2010-09-17 2012-03-22 Siemens Aktiengesellschaft Auslöseeinrichtung für ein Schutzschaltgerät sowie Schutzschaltgerät
DE102011075727A1 (de) 2011-05-12 2012-11-15 Siemens Aktiengesellschaft Vorrichtung zum Auslösen eines elektrischen Schalters
EP2824689B1 (fr) 2013-06-13 2016-04-06 ABB Schweiz AG Déclencheur dynamique et commutateur d'installation électrique doté d'un déclencheur dynamique
CN104465254A (zh) * 2013-09-24 2015-03-25 上海电科电器科技有限公司 旋转双断点触头
KR102349751B1 (ko) * 2017-03-21 2022-01-11 엘에스일렉트릭(주) 단극차단유닛이 구비된 회로 차단기
DE102018211995B4 (de) * 2017-08-01 2020-12-10 Siemens Aktiengesellschaft Druckauslöser für einen elektrischen Schalter und elektrischer Schalter mit solch einem Druckauslöser
EP3557597B1 (fr) * 2018-04-20 2024-01-17 ABB S.p.A. Disjoncteur basse tension

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631369A (en) * 1970-04-27 1971-12-28 Ite Imperial Corp Blowoff means for circuit breaker latch
JP3721266B2 (ja) * 1998-08-04 2005-11-30 株式会社日立産機システム 回路遮断器
JP2954936B1 (ja) * 1998-08-14 1999-09-27 寺崎電気産業株式会社 回路遮断器の引外し装置
DE19903911B4 (de) * 1999-02-01 2004-09-23 Ge Power Controls Polska Sp.Z.O.O. Auslösevorrichtung für Schalter und Schaltkontaktanordnung

Also Published As

Publication number Publication date
EP1266389A1 (fr) 2002-12-18
DE10013161B4 (de) 2004-02-05
US20010045879A1 (en) 2001-11-29
DE10013161A1 (de) 2001-09-27
PL198622B1 (pl) 2008-07-31
PL357600A1 (en) 2004-07-26
ATE362646T1 (de) 2007-06-15
DE50112509D1 (de) 2007-06-28
WO2001069637A1 (fr) 2001-09-20
ES2284645T3 (es) 2007-11-16

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