EP1501112A1 - Verbesserte magnetische Untereinheit und Schutzschalter der diese Untereinheit beinhaltet - Google Patents

Verbesserte magnetische Untereinheit und Schutzschalter der diese Untereinheit beinhaltet Download PDF

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Publication number
EP1501112A1
EP1501112A1 EP04360055A EP04360055A EP1501112A1 EP 1501112 A1 EP1501112 A1 EP 1501112A1 EP 04360055 A EP04360055 A EP 04360055A EP 04360055 A EP04360055 A EP 04360055A EP 1501112 A1 EP1501112 A1 EP 1501112A1
Authority
EP
European Patent Office
Prior art keywords
magnetic
striker
subassembly according
core
magnetic subassembly
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.)
Granted
Application number
EP04360055A
Other languages
English (en)
French (fr)
Other versions
EP1501112B1 (de
Inventor
Jean-Marc Voirpin
Denis Herbrech
Jean-Michel Vigneron
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.)
Hager Electro SAS
Original Assignee
Hager Electro 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 Hager Electro SAS filed Critical Hager Electro SAS
Priority to SI200430099T priority Critical patent/SI1501112T1/sl
Publication of EP1501112A1 publication Critical patent/EP1501112A1/de
Application granted granted Critical
Publication of EP1501112B1 publication Critical patent/EP1501112B1/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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
    • H01H71/322—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with plunger type armature

Definitions

  • the present invention relates to a magnetic subassembly for modular electrical equipment of the breaker type, as well as that a circuit breaker incorporating such a subset.
  • Line protection circuit breakers include generally, in a modular housing with a plastic shell, a circuit extending between two terminals and comprising a bimetallic strip thermal tripping for the protection of the line against overloads and, between a terminal and a fixed contact, an electromagnetic trip or magnetic trip often grouped with these two components to form a subset magnetic.
  • the magnetic trigger essentially comprises a coil with a movable core, associated with a striker for ensure, in case of overcurrent, the disjunction by opening a mobile contact cooperating with a fixed contact.
  • the trigger includes more precisely a longitudinally mounted induction coil in a magnetic yoke, and surrounding the moving core, which is associated with the firing pin and a fixed core, a return spring arranged between the cores completing the assembly.
  • This spring allows in particular to recall the mobile core in position rest, striker in the inactive position, that is to say at a distance from a mechanical lock allowing the opening of the contacts by tilting mobile contact.
  • the cylinder head consists of a sheet of magnetic material surrounding in general the coil to properly channel the lines of fields produced when the coil is traversed by a current. Subassemblies magnets mounted in one piece are then arranged in a part of the plastic shell of the housing, at the time of circuit breaker assembly.
  • these subsets are essential elements of the circuit-breakers, and their design is therefore the subject of particular care, as well as numerous tests intended to test the validity of the recommended solutions.
  • the main function being linked to the existence of sudden overcurrents, some of these tests are, of course, made in different short circuit configurations, or at least with currents equal to several times the value of the rated current, for which the Magnetic subassembly performance is measured.
  • one of the parameters particularly and especially control is the pulling force of the contacts.
  • the purpose of these checks, and resulting adjustments, is to refine the conditions of triggering the mechanical lock by better control of the electromagnetic trigger and force conveyed by the firing pin.
  • the heating of the different parts of the magnetic subassembly is also a sensitive parameter, for which current tests nominal or slightly higher, in order to reduce it as much as possible.
  • Magnetic subassemblies comprising a cylinder are known fixed guide in which the moving core associated with the striker, as well as a fixed magnetic core.
  • An object of the present invention is therefore to reduce the number of constituent parts of the magnetic subassembly and to simplify them for facilitate their assembly, while maintaining the reliability of said subset magnetic.
  • Another object of the present invention is to increase the performance of the magnetic subassembly without increasing its size, with a view to its integration in an apparatus modular electric.
  • the mobile core is housed in a mobile support, driven by the mobile core, and secured to the striker.
  • the mobile support and the striker are made in one piece, for example plastic.
  • the mobile support is for example a cylindrical piece ending at one of its ends by a rod constituting the striker.
  • the mobile core is furthermore devoid of any chamfering, drilling or countersink, thus increasing its polar surface. No step of solidarization of the striker on the mobile core is moreover necessary.
  • the elastic return means is for example mounted between the support mobile and the magnetic yoke.
  • This elastic return means is by example consisting of a flexible blade.
  • the positioning of this means of elastic recall avoids any interaction with field lines magnetic generated in the gap.
  • the performance of the subset magnetic and are improved and its mounting in the cylinder head is also simplified by its configuration.
  • the magnetic subassembly comprises means for guiding the striker in translation.
  • the guiding means comprises, for example, a closed opening in the breech, and crossed by the striker.
  • the translation guide of the striker indirectly ensures the translational guidance of the mobile support and therefore of the subset mobile mechanics. No additional guidance means is necessary, thus contributing to the reduction of the number of constituent of the magnetic subassembly according to the invention.
  • the guiding means comprises an opening in a fixed core and traversed by the striker.
  • the fixed magnetic core is for example integral with the cylinder head.
  • the cylinder head is made in one magnetic material constituting a complementary magnetic element fixed.
  • a part of the breech, facing one side pole of the mobile magnetic core constitutes the magnetic element complementary fixed.
  • the breech may also be non-magnetic and associated or not with a core magnetic fixed.
  • the magnetic subassembly according to the invention also has the advantage of being adaptable to various constraints, both structurally that functional.
  • the induction coil is a coil with disjointed turns.
  • the number of turns can advantageously be reduced since the polar surface of the moving core is increased.
  • the absence of contact between the adjacent turns also makes it possible to avoid to coat them with a layer of electrical insulating enamel, contributing to a reducing the cost price of such an induction coil without adversely affect the performance of the magnetic subassembly.
  • the ends of the coil Inductors move tangentially from the turns of the coil. Such a configuration avoids folding operations of said ends and therefore reduce the cost price of such a coil induction.
  • the present invention finds particular application in the electrical circuit breaker field, incorporating a subset magnetic as described above.
  • the magnetic subassembly represented for example in FIG. comprises a magnetic yoke (1) made for example of a material magnet and an induction coil (2) to be mounted longitudinally in the cylinder head (1).
  • the cylinder head (1) makes it possible to channel at least partially the lines of magnetic field generated by an electric current flowing through the coil induction (2).
  • the cylinder head (1) can be nonmagnetic.
  • the magnetic subassembly also has a core movable magnet (3) made of a magnetic material, for example steel.
  • the core (3) has a substantially cylindrical shape and two polar faces (4) and (5).
  • a striker (6), moving with the movable core (3), is also planned and allows to open an electrical contact when moving from one inactive position to an active position.
  • An elastic return means is provided so as to be solicited by the movement of the striker (6). So when the flow of current electrical supply in the induction coil (2) is interrupted, the means of elastic return (7a, 7b) automatically returns the firing pin (6) in its inactive position and the electrical contact can be closed again.
  • connection terminal (10) to the magnetic subassembly to which is connected the second end (2b) of the coil (2) is also provided.
  • Part of the breech (1), facing the polar face (5) of the mobile magnetic core (3) then constitutes a fixed magnetic core.
  • the air gap (11) is in this embodiment devoid of a core stationary magnet and is at least partially deported outside the the magnetic coil (2).
  • the mobile core (3) is also simplified in its form, which is for example cylindrical.
  • connection terminal (10) is advantageously extended by a magnetic portion (10a) extending along the coil (2) and allowing to partially channel the magnetic field lines generated by the induction coil (2).
  • the cylinder head (1) as well as the magnetic part (10a) thus delimit a housing in which is inserted the coil magnetic (2).
  • the subassembly magnetic comprises a fixed magnetic core (3a), integral of the breech (1) and crossed by the striker (6).
  • the gap (11) is located between the polar faces facing each other, the mobile core (3) and fixed core (3a).
  • the gap (11) then extends into the interior volume delimited by the magnetic coil (2).
  • the fixed core (3a) is fixed on the cylinder head (1) by any known means, and in particular by mounting in force or by welding.
  • the mobile core (3) is housed in a mobile support (13) driven by said movable core (3) and integral with the striker (6).
  • a mobile mechanical subassembly displaced by the circulation of a overcurrent in the induction coil (2).
  • the dimensions of the kernel mobile (3) and air gap (11) are chosen according to the force necessary to allow the striker (6) to open a contact electric.
  • the movement of the firing pin (6) makes it possible to tear off a contact mobile device (8a) resting on the contact pad (9) and interrupting the circulation of an electric current in the induction coil (2).
  • the way elastic return allows, as soon as the flow of current is interrupted electric in the induction coil (2), to bring back the subset movable mechanism, namely the movable core (3), the movable support (13) and the striker (6) in its inactive position.
  • the mobile support (13) and the striker (6) are made in one piece, for example plastic or any other electrical insulating material.
  • the mobile support (13) is a part cylindrical end at one of its ends by a rod constituting the striker (6).
  • the manufacture of such a mobile support (13) by injection is therefore particularly simple and its dimensions are chosen so as to to secure it with the mobile core (3) by a simple operation fitting.
  • Other known technical means of the collage type may also be provided to secure the mobile core (3) with the mobile support (13).
  • the elastic return means is mounted between the movable support (13) and the magnetic yoke (1).
  • This elastic return means is for example consisting of a flexible blade (7a) having openings to be traversed by positioning studs (1a) present in number more or less important on the cylinder head (1).
  • the striker (6) passes through an opening (1b) arranged in the cylinder head (1).
  • This opening (1b) constitutes a means of translational guidance of the striker (6) and indirectly a means of guiding the mobile mechanical subassembly, the latter not being connected to the cylinder head (1) via the elastic return means.
  • the fixed core (3a) is engaged in the opening (1b), constitutes a guide piece for the striker (6).
  • the induction coil (2) advantageously has turns disjoint. Given the fact that the polar face (5) is relatively important and that it does not include any recess, chamfer or counterbore likely to alter the magnetic field lines, the reduction of the number of turns surrounding the mobile core (3) can maintain or to improve the performance of the magnetic subassembly.
  • the ends (2a) and (2b) of the induction coil (2) move apart tangentially turns of the coil (2). Any folding operation said ends (2a, 2b) are suppressed. We thus obtain in more than one way, a reduction in the cost price of such an induction coil (2).
  • the elastic return means can also be constituted as the shows for example Figures 3 to 5, an elastic strip (7b) integral of the mobile support (13).
  • This elastic strip (7b) extends for example to the outside of the constituent cylinder of the mobile support (13) in the form of Peripheral crown. The latter then takes support on one side side (1a) of the cylinder head (1).
  • the elastic lamella (7b) is deformed and then resumes its initial shape as soon as the interruption of the electric current flowing in the induction coil (2), returning the striker (6) to its inactive position.
  • the means of elastic return consists of a spring washer (7c) positioned in the gap (11).
  • the spring washer (7c) is supported on the face (12) internal of the cylinder head (1) and on one of the ends of the mobile support (13).
  • this spring washer (7c) is compressed.
  • this spring washer (7c) made for example, made of plastic or metal, or foam, resumes its original shape and returns the movable support (13) to its corresponding rest position at the inactive position of the striker (6).
  • the yoke (1) is non-magnetic and no fixed magnetic core is attached to said cylinder head (1).
  • the displacement of the mobile core 3 is obtained by a location area given a maximum density of magnetic field lines, and to which he is trained. Such a displacement suffices to actuate the striker (6).
  • Fig. 8 shows a partially cut-away view, for purposes of clarity, a circuit breaker (15) according to the invention.
  • the circuit breaker (15) incorporating a magnetic subassembly according to the invention comprises a modular housing (16) provided with fixing means (17), by example on a support type mounting rail (not shown).
  • the circuit breaker (15) has a lever-type actuator tilting device (18) for moving the movable contact (8a) between a opening and closing position (see figure 8) of the electrical connection with the fixed contact (8).
  • the striker (6) acts on a mechanical lock (19) known as such, which moves the movable contact (8a) to open the electrical connection with the fixed contact (8).
  • This opening leads to the interruption of the circulation of an electric current between the terminals of connection (10) of the circuit breaker and automatically returns the handle (18) in the position corresponding to the separation of the fixed contacts (8) and mobile (8a), thanks to the mechanical lock (19).
  • the mechanical lock (19) can be actuated to interrupt the current flow either by the striker (6) or by a bimetallic strip thermal tripping incorporated in the circuit-breaker (15) (no represented in the figures).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Hard Magnetic Materials (AREA)
  • Air Bags (AREA)
EP04360055A 2003-07-22 2004-05-28 Verbesserte magnetische Untereinheit und Schutzschalter der diese Untereinheit beinhaltet Expired - Lifetime EP1501112B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200430099T SI1501112T1 (sl) 2003-07-22 2004-05-28 Izboljsana magnetna podenota in odklopnik, ki obsega to podenoto

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0308949A FR2858106B1 (fr) 2003-07-22 2003-07-22 Sous-ensemble magnetique ameliore et disjoncteur comportant un tel sous-ensemble magnetique
FR0308949 2003-07-22

Publications (2)

Publication Number Publication Date
EP1501112A1 true EP1501112A1 (de) 2005-01-26
EP1501112B1 EP1501112B1 (de) 2006-08-09

Family

ID=33484684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04360055A Expired - Lifetime EP1501112B1 (de) 2003-07-22 2004-05-28 Verbesserte magnetische Untereinheit und Schutzschalter der diese Untereinheit beinhaltet

Country Status (8)

Country Link
EP (1) EP1501112B1 (de)
CN (1) CN1320580C (de)
AT (1) ATE336076T1 (de)
BR (1) BRPI0402801A (de)
DE (1) DE602004001817T2 (de)
ES (1) ES2271824T3 (de)
FR (1) FR2858106B1 (de)
SI (1) SI1501112T1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009021771A1 (de) 2009-05-18 2010-11-25 Abb Ag Elektromagnetischer Auslöser und Schaltgerät

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515292A1 (de) * 1991-05-21 1992-11-25 Schneider Electric Sa Elektromagnetischer Auslöser für einen Schwachstromschalter
WO1999063564A1 (fr) * 1998-06-03 1999-12-09 Hager Electro Sous-ensemble magnetique optimise
DE10126854A1 (de) * 2001-06-01 2002-12-19 Siemens Ag Magnetjoch eines elektromagnetischen Auslösers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343178A (en) * 1993-07-09 1994-08-30 Circuit Breaker Industries Limited Electric circuit breaker
DE19845476B4 (de) * 1998-10-02 2004-08-12 Aeg Niederspannungstechnik Gmbh & Co Kg Magnetsystem für Leitungsschutzschalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515292A1 (de) * 1991-05-21 1992-11-25 Schneider Electric Sa Elektromagnetischer Auslöser für einen Schwachstromschalter
WO1999063564A1 (fr) * 1998-06-03 1999-12-09 Hager Electro Sous-ensemble magnetique optimise
DE10126854A1 (de) * 2001-06-01 2002-12-19 Siemens Ag Magnetjoch eines elektromagnetischen Auslösers

Also Published As

Publication number Publication date
ATE336076T1 (de) 2006-09-15
FR2858106B1 (fr) 2005-09-23
BRPI0402801A (pt) 2005-05-24
EP1501112B1 (de) 2006-08-09
SI1501112T1 (sl) 2007-02-28
CN1320580C (zh) 2007-06-06
CN1577687A (zh) 2005-02-09
DE602004001817D1 (de) 2006-09-21
FR2858106A1 (fr) 2005-01-28
ES2271824T3 (es) 2007-04-16
DE602004001817T2 (de) 2007-08-16

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