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EP2544208B1 - Coupe-circuit avec tore magnétique optimisé - Google Patents

Coupe-circuit avec tore magnétique optimisé Download PDF

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Publication number
EP2544208B1
EP2544208B1 EP11172628.7A EP11172628A EP2544208B1 EP 2544208 B1 EP2544208 B1 EP 2544208B1 EP 11172628 A EP11172628 A EP 11172628A EP 2544208 B1 EP2544208 B1 EP 2544208B1
Authority
EP
European Patent Office
Prior art keywords
terminal connection
short
coil
circuit
terminal
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.)
Active
Application number
EP11172628.7A
Other languages
German (de)
English (en)
Other versions
EP2544208A1 (fr
Inventor
Bernhard Rösch
Yi Zhu
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP11172628.7A priority Critical patent/EP2544208B1/fr
Priority to US13/540,702 priority patent/US8525624B2/en
Priority to BR102012016571-6A priority patent/BR102012016571B1/pt
Priority to KR1020120072976A priority patent/KR101572429B1/ko
Priority to CN201210233247.9A priority patent/CN102867709B/zh
Publication of EP2544208A1 publication Critical patent/EP2544208A1/fr
Application granted granted Critical
Publication of EP2544208B1 publication Critical patent/EP2544208B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
    • 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
    • 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
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic 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
    • H01H71/2481—Electromagnetic mechanisms characterised by the coil design

Definitions

  • the invention relates to a short-circuit release, in particular for a circuit breaker with an armature and a pole, which are arranged within a bobbin, and a yoke plate and a clamping connection, which are arranged around the bobbin.
  • Such short-circuit releases are used in circuit breakers for switching and protecting motors and other consumers. These short-circuit releases are designed as electromagnetic triggers that essentially comprise a coil winding, a bobbin, an armature, a pole, a plunger, a retaining spring and a yoke.
  • the armature will pick up at a certain rated current of the circuit breaker, for example, 12 times the nominal current for motor protection or a 19 times the rated current for transformer protection.
  • the armature movement acts on a switch lock and on a movable contact piece to open the contacts. Normally, the operating current may fluctuate by a maximum of +/- 20%.
  • the difficulty is because of the required larger support cross-sections, smaller numbers of turns, larger tolerances of the coil of the winding wire and the associated inhomogeneous magnetic magnetic field, the coil winding to position the air gap between the armature and pole sufficiently accurate, so that the response limits complied with the standard can be.
  • the problem of fixing the coil winding in the position once determined to the air gap so that at the rated current and high short-circuit current does not shift the coil winding in the direction of the center of gravity or the coil contracts and deformed and thus the response limits are no longer met.
  • the coils are made with adjacent winding turns to prevent the coil from contracting and deforming at high short circuit currents. Due to the use of uniform bobbin for each size and its interpretation for the largest geometric coil winding, often creates a gap between Spulenanalysisflansch or yoke and the last turn of the coil winding. After the exact positioning of the coil winding to the air gap between the armature and the yoke, one end of the coil is glued to the bobbin flange or yoke to fix the coil winding, and the other end of the coil is welded to a connection.
  • the short-circuit release must be adapted. Due to the high switching capacity of an 80 A device, the heat budget is critical. In addition, due to the increasing contact load also increases the power requirement on the trigger. Assuming that the trigger does not have more power dissipation than the current 50 A trigger with correspondingly the same excitation, the magnetic circuit must be built more efficiently.
  • the yoke plate is simultaneously formed as a bimetal and is made of a platinum-plated, made of material, for example, a pair of iron and copper.
  • the object of the present invention is to provide a short-circuit release, in particular for a circuit breaker having an improved magnetic circuit at a high switching capacity.
  • this object is achieved by a short-circuit release, in particular for a circuit breaker, with an armature and a pole, which are arranged within a bobbin, and a yoke plate and a terminal connection, which are arranged around the bobbin.
  • the invention is characterized in that opposite to the yoke plate at the terminal connection fitting, a magnetic plate is arranged.
  • the feature essential to the invention is the arrangement of yoke plate and magnetic plate to each other, made of two separate parts without direct connection to the terminal connection.
  • the terminal connection is also made as a single part, the takes over the function as a current path.
  • the additional magnetic sheet according to the invention substantially reduces the magnetic loss.
  • This arrangement of the non-platinum-plated magnetic sheet is placed only in the area where it is magnetically required. With a platinized strip material, such as copper, iron, the assignment is partially not possible.
  • the terminal connection would be continuous made of platin jewem molding material.
  • a partial combination of two materials by means of, for example, runway welding, can not be used, since the introduced heat for welding the metal structure would be changed so that the effects on the magnetic circuit would be unacceptable.
  • the high cost of the starting material are crucial for the division of magnetic plate and terminal connection.
  • the positive pairing of magnetic sheet and terminal connection is essential.
  • a depression or embossing is arranged in the magnetic sheet. This is arranged axially parallel to the axial center of the short-circuit release to allow the required space for the adjacent coil turns.
  • the required cross section can vary as far as required by the design of the coil. This also allows to optimize the installation space in the overall unit and to allow manufacturing tolerances.
  • a corresponding clearance in the terminal connection is a prerequisite for the implementation of the embossing on the magnetic sheet.
  • Another significant advantage is that the individual pairing of parts an unnecessary loss in the current path can be avoided.
  • a recess is also provided on the terminal connection, can be compensated by the supernatants by welding beads, so that the risk of installation errors can be avoided. It is also possible to use the cost-effective TIG welding process.
  • a further advantageous embodiment provides that the welding area is formed bent over at the terminal connection, so that a surface for connecting the parts is formed.
  • the size is optimized after the necessary current transition and the lowest electrical resistance.
  • a welded joint can be implemented here, as well as a solder joint.
  • the items of magnetic sheet and terminal connection can be treated as bulk material. These can - but do not have to - be positively connected with each other. Due to the external shape and coordination of the tolerances, the parts can be placed inside each other and inserted conclusively into the bobbin, so that the magnetic sheet is pressed directly to the pole face from below. A firm connection of the two parts is costly, by the custom-fit installation or by the exact fit impressions in the mold cavity of the bobbin this is bypassed.
  • the short-circuit release according to the invention in particular for a circuit breaker, has an armature and a pole, which are arranged inside a coil former. On the spool a coil is wound.
  • the bobbin is framed by a yoke plate and a terminal connection.
  • the yoke plate is preferably U-shaped.
  • the terminal connection surrounds the bobbin including coil preferably with two right-angled legs.
  • a magnetic plate is arranged, which is preferably U-shaped and has two legs, and a transition region. In this case, the transition region of the magnetic sheet bears against a first limb of the terminal connection.
  • the one leg of the magnetic plate abuts against a second leg of the terminal connection.
  • the other leg of the magnetic plate is anchored in the bobbin.
  • the coil has two ends. One end of the coil is connected to the overload protection. The other end of the coil is welded to the terminal connection. Below the one leg of the terminal terminal, a plunger is arranged, which is guided in a contact slide device of the circuit breaker.
  • the inventive short-circuit release with optimized magnetic circuit has a good magnetic design with reduced electrical loss. There is a lower magnetic excitation needed, which is associated with a lower power loss. In addition, the space requirement is minimized by the fact that no platinierter starting material is used. The arrangement of the parts to each other is optimized. It is also advantageous that the items can be treated as bulk material. By means of the present short-shot release according to the invention, moreover, the dimensions and tolerances can be defined more precisely. The extended current path from the N-trigger to the terminals also causes the terminal temperature to drop. With the present short-circuit release according to the invention, a cost-effective solution for high switching capacities has been created in a circuit breaker.
  • Fig. 1 is an inventive short-circuit release 1, in particular for a circuit breaker shown having an armature 2 and a pole 3, which are arranged within a bobbin 4.
  • a coil 5 is wound on the bobbin 4.
  • the bobbin 4 is framed by a yoke 6 and a terminal connection 7.
  • the yoke 6 is preferably U-shaped.
  • the terminal connection 7 surrounds the bobbin 4, including the coil 5, preferably with two legs 8, 9 which are at right angles to one another.
  • a magnetic plate 10 is arranged, which is preferably U-shaped and has two legs 11, 12, and a transition region 13. In this case, the transition region 13 of the magnetic sheet 10 is located on the leg 8 of the terminal terminal 7.
  • the leg 12 of the magnetic sheet 10 abuts the leg 9 of the terminal terminal 7.
  • the leg 11 of Magnetic plate 10 is anchored in the bobbin 4.
  • the coil 5 has two ends 14, 15.
  • the end 14 of the coil is connected to the overload protection (not shown).
  • the end 15 of the coil 5 is welded to the terminal connection 7.
  • Fig. 2 shows the terminal connection 7 with magnetic plate 10 arranged thereon.
  • the magnetic plate 10 is arranged on the legs 8, 9 of the terminal connection 7.
  • the transition region 13 of the magnetic sheet 10 is located on the leg 8 of the terminal connection 7.
  • the leg 12 of the magnetic sheet 10 abuts the leg 9 of the terminal terminal 7.
  • a recess 17 or embossing, axially parallel to the axial center of the short-circuit release arranged in order to allow the required space for the adjacent coil.
  • the required cross section can vary as far as required by the design of the coil. This also allows to optimize the installation space in the overall device and to provide manufacturing tolerances available.
  • a corresponding free space in the terminal connection is a prerequisite for the implementation of the embossing on the magnetic sheet 10th
  • Fig. 3 shows the bobbin 4 with armature 2 and pole 3 and the arrangement between the pole face 18 and the magnetic plate 10.
  • the items of the magnetic plate and terminal connection can be treated as bulk material. These can, but do not have to be connected in a form-fitting way. Due to the external shape and coordination of tolerances, the parts can be placed inside each other and inserted in a conclusive manner in the bobbin, so that the magnetic sheet is pressed directly to the pole face 18 from below. A firm connection of the parts is costly, by the accurate installation or by the exact fit impressions in the mold cavity of the bobbin 4, this is bypassed.
  • Fig. 4 the connection between the coil end 15 and the terminal connection 7 is shown.
  • a recess 19 is formed on the magnetic sheet 10, so that the coil end 15 can be welded to the terminal connection 7.
  • Fig. 5 indicates the coil connection Fig. 4 at the terminal connection 7, wherein an additional recess 20 is shown on the terminal connection 7.
  • the recess 20 or recess at the terminal connection 7 supernatants are compensated by welding beads, so that the risk of installation errors is reduced and the less expensive TIG welding process can be used.
  • a further embodiment of a coil terminal is shown with bent welding area 21 at the terminal connection 7.
  • the welding area 21 is bent at the terminal connection 7, so that a surface 22 for connecting the parts is formed.
  • the size is optimized after the necessary current transition and the lowest electrical resistance.
  • a welded joint can be implemented, as well as a solder joint is possible.
  • the inventive short-circuit release with optimized magnetic circuit has a good magnetic design with reduced electrical loss. There is a lower magnetic excitation needed, which is associated with a lower power loss. In addition, the space requirement is minimized by the fact that no platinierter starting material is used. The arrangement of the parts to each other is optimized. It is also advantageous that the items can be treated as bulk material. By means of the present short-shot release according to the invention, moreover, the dimensions and tolerances can be defined more precisely. The extended current path from the N-trigger to the terminals also causes the terminal temperature to drop. With the present short-circuit release according to the invention, a cost-effective solution for high switching capacities has been created in a circuit breaker.

Landscapes

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

Claims (7)

  1. Coupe-circuit (1) avec un induit (2) et un pôle (3), qui sont agencés à l'intérieur d'une armature de bobine (4), ainsi qu'une tôle de culasse (6) et une connexion serrée (7), qui sont agencées autour de l'armature de bobine (4), caractérisé en ce que, à l'opposé de la tôle de culasse (6) est agencée une tôle magnétique (10) reposant au niveau de la connexion serrée (7), un évidement (19) étant configuré au niveau de la tôle magnétique (10) de telle sorte qu'une bobine (5) enroulée sur l'armature de bobine (4) peut être soudée directement au niveau de la connexion serrée (7).
  2. Coupe-circuit (1) selon la revendication 1, caractérisé en ce que la tôle magnétique (10) et la connexion serrée (7) sont associées l'une à l'autre par complémentarité de formes.
  3. Coupe-circuit (1) selon la revendication 1 ou 2, caractérisé en ce que dans la tôle magnétique (10) une cavité (17) est agencée.
  4. Coupe-circuit (1) selon la revendication 3, caractérisé en ce que la cavité (17) est agencée dans la tôle magnétique (10) de manière parallèle à l'axe par rapport à l'axe central du coupe-circuit (1).
  5. Coupe-circuit (1) selon la revendication 3 ou 4, caractérisé en ce que, en corrélation avec la cavité (17) dans la tôle magnétique (10), un évidement est configuré dans la connexion serrée (7).
  6. Coupe-circuit (1) selon la revendication 1, caractérisé en ce que la connexion serrée (7) présente dans la zone de la soudure de la connexion de bobine un dégagement (20).
  7. Coupe-circuit (1) selon la revendication 1, caractérisé en ce que, au niveau de la connexion serrée (7) est configurée une zone de soudure coudée (21), de sorte qu'une surface (22) est disponible pour la connexion soudée entre la bobine (5) et la connexion serrée (7).
EP11172628.7A 2011-07-05 2011-07-05 Coupe-circuit avec tore magnétique optimisé Active EP2544208B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP11172628.7A EP2544208B1 (fr) 2011-07-05 2011-07-05 Coupe-circuit avec tore magnétique optimisé
US13/540,702 US8525624B2 (en) 2011-07-05 2012-07-03 Short-circuit release having an optimized magnetic circuit
BR102012016571-6A BR102012016571B1 (pt) 2011-07-05 2012-07-04 liberação de curto-circuito
KR1020120072976A KR101572429B1 (ko) 2011-07-05 2012-07-04 최적화된 자기 회로를 갖는 단락 회로 해제장치
CN201210233247.9A CN102867709B (zh) 2011-07-05 2012-07-05 具有最优化的磁路的短路脱扣器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11172628.7A EP2544208B1 (fr) 2011-07-05 2011-07-05 Coupe-circuit avec tore magnétique optimisé

Publications (2)

Publication Number Publication Date
EP2544208A1 EP2544208A1 (fr) 2013-01-09
EP2544208B1 true EP2544208B1 (fr) 2016-04-13

Family

ID=44999998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11172628.7A Active EP2544208B1 (fr) 2011-07-05 2011-07-05 Coupe-circuit avec tore magnétique optimisé

Country Status (5)

Country Link
US (1) US8525624B2 (fr)
EP (1) EP2544208B1 (fr)
KR (1) KR101572429B1 (fr)
CN (1) CN102867709B (fr)
BR (1) BR102012016571B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2498806A (en) * 2012-01-30 2013-07-31 P S Electrical Services 1998 Ltd Air circuit breaker coil adapter
CN106783430A (zh) * 2016-11-29 2017-05-31 贵州新纳电器有限公司 一种油阻尼断路器的油阻尼器固定结构

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840663A (en) * 1954-05-05 1958-06-24 Westinghouse Electric Corp Circuit breaker
US4443775A (en) * 1981-01-31 1984-04-17 Shoketsu Kinzoku Kogyo Kabushiki Kaisha Solenoid actuator
US4528539A (en) * 1984-06-28 1985-07-09 Eaton Corporation Reduced-size thermal overload relay
CH670170A5 (fr) * 1986-04-07 1989-05-12 Sprecher & Schuh Ag
DE3619239A1 (de) * 1986-06-07 1987-12-10 Kloeckner Moeller Elektrizit Schnellausloeser fuer leitungsschutzschalter
US5808534A (en) * 1996-07-30 1998-09-15 Laffey; James Solenoid frame and method of manufacture
JP3117074B2 (ja) 1996-08-06 2000-12-11 富士電機株式会社 回路遮断器
US5910758A (en) * 1997-12-08 1999-06-08 Eaton Corporation Miniature circuit breaker with shunt trip device
DE102006006031B4 (de) * 2005-04-20 2009-12-24 Bürkert Werke GmbH & Co. KG Elektromagneteinheit sowie Verfahren zur Herstellung einer solchen Elektromagneteinheit und eines Magnetgehäuses für eine solche Elektromagneteinheit
CN1971799B (zh) * 2006-12-05 2010-10-13 上海电科电器科技有限公司 脱扣电磁铁装置
CN101211723A (zh) * 2006-12-29 2008-07-02 三菱电机株式会社 电路断路器的电磁跳闸装置

Also Published As

Publication number Publication date
BR102012016571B1 (pt) 2020-10-27
US8525624B2 (en) 2013-09-03
CN102867709B (zh) 2015-08-19
BR102012016571A2 (pt) 2013-07-09
US20130009733A1 (en) 2013-01-10
EP2544208A1 (fr) 2013-01-09
KR20130005243A (ko) 2013-01-15
CN102867709A (zh) 2013-01-09
KR101572429B1 (ko) 2015-11-27

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