EP1191567A1 - Magnetische Blasvorrichtung für Lichtbogen - Google Patents

Magnetische Blasvorrichtung für Lichtbogen Download PDF

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Publication number
EP1191567A1
EP1191567A1 EP00440253A EP00440253A EP1191567A1 EP 1191567 A1 EP1191567 A1 EP 1191567A1 EP 00440253 A EP00440253 A EP 00440253A EP 00440253 A EP00440253 A EP 00440253A EP 1191567 A1 EP1191567 A1 EP 1191567A1
Authority
EP
European Patent Office
Prior art keywords
arc
magnetic
blowing
sheets
circuit
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.)
Withdrawn
Application number
EP00440253A
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English (en)
French (fr)
Inventor
Stéphane Haessler
Francis Deckert
Patrice c/o Hager Electro Joyeux
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 EP00440253A priority Critical patent/EP1191567A1/de
Publication of EP1191567A1 publication Critical patent/EP1191567A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • 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
    • H01H71/38—Electromagnetic mechanisms wherein the magnet coil also acts as arc blow-out device

Definitions

  • the present invention relates to an arc blowing device integrated into a modular electrical line protection device of the type breaker.
  • These devices conventionally comprise a fixed contact and a contact which establish an electrical connection when they are in contact with each other on the other, and which cut it when they are separated, voluntarily using a joystick or automatically by tilting of a mechanical lock in the event of overcurrent or overload on the line.
  • said voltage is increased by dividing the arc in a stack of deionization sheets.
  • We increases the number of arc feet and, knowing the value of the voltage across each arc foot, a number of sheets allowing to achieve by addition to a total arc voltage greater than that of the network.
  • a second classic solution is simply to lengthen the arc to increase the tension. In both cases, it is still necessary to move the arc so that it goes from the contact zone proper to a place where it is sufficiently elongated or divided to meet the required criterion, know how to present a voltage higher than that of the network to be able to off.
  • arc conduction sheets limiting on two sides opposite the arc extinguishing chambers combined with the loop effect applying to the arc, direct the latter towards the terminal zone of each chamber, where there is either a stack of deionization plates, or a configuration achieving an elongation of the arc leading to to pass its tension beyond that of the network.
  • the creation of the arc can generate a sudden overpressure, especially downstream, which tends to oppose its movement.
  • the control of the progression of the arc towards the room extinction involves several contradictory phenomena.
  • an effective magnetic blowing is put in use, i.e. a magnetic field with an appropriate direction is applied to the arc plasma in the contact area, generating forces on the arc causing it to move towards the chamber (s) extinction.
  • magnetic braking of the arc is on the contrary implemented at the output of each arc extinguishing chamber, in order to stop the arc in the zone most favorable to its extinction. Secondarily, this has the effect of limiting the amount of plasma ejected in the air by the product.
  • the invention makes it possible to prevent arc returns to the mechanical lock.
  • the same coil inductor cooperates simultaneously with the triggering device magnetic and the magnetic blowing circuit.
  • the magnetic circuit of the triggering device or magnetic actuator has a spiral-shaped induction coil plane arranged parallel to said long sides and comprising a central hole in which is inserted a magnetic core extended by two flat branches forming the fixed part of said circuit, at the end opposite of which is a movable pallet ensuring the tripping in the event of overcurrent, two shielding sheets respectively coplanar with each of the branches and extending these on either side of the arc blowing area and at least part of each arc extinguishing chamber forming the circuit magnetic arc blowing.
  • the spiral configuration of the coil allowing a structure of thin, also allows the generation of field lines which are channeled on the one hand in the branches of the device magnetic release, and secondly in the shielding sheets which also partially cover said coil.
  • the field lines get develop perpendicularly and between said sheets. This is produced in particular when there is a disjunction created by a short circuit, and therefore creation of an electric arc to blow.
  • the shielding are identical and arranged in the extension of said branches, from which they are separated by an air gap, in the vicinity of the core passing through the center of the induction coil, said sheets of shielding covering the contact zone and at least partially each arc extinguishing chamber.
  • the shielding sheets have edges which follow, at least in their portion covering each room arc extinction, the arc conduction sheets delimiting it.
  • the switching zones of the contacts and each arc are arranged in the motor polarity zone of the field of the magnetic blowing circuit.
  • these are two in number arranged downstream of an arc division zone and delimited by on the one hand, respectively, an arc conduction sheet extending the fixed contact and an arc conduction sheet connected to the movable contact, and on the other hand an intermediate arc conduction sheet common to two chambers, the three arc conduction sheets developing in the same medium plane and having a shape such that the arc divides in two branches at the entrance to the arc extinguishing chambers, is moving in a substantially identical direction but in direction opposite and exerting a mutual magnetic blowing favoring their displacement in said arc extinguishing chambers.
  • the profile of the sheets is also studied to prevent the arc from stagnating, its stagnation favoring the ionization of the plasma. In terms of current loop plots, as discussed in more detail in the further, this geometry is moreover very favorable.
  • the arc conduction sheets connected to the fixed contacts and mobile each have, in the arc division area, a loop advancing one in the direction of the other, the conduction sheet intermediate with a rounded apex substantially culminating between said loops, which are extended at the edge of the chambers arc extinction by portions of rectilinear appearance, as well as the sheet intermediate on either side of said summit, making it possible to obtain division two arches of parallel shape exerting a mutual blowing by loop effect.
  • the distance between the sheets is at this minimum location, and this geometry creates current loops favorable to the movement of arcs.
  • each arc extinguishing chamber is equipped a stack of deionization sheets.
  • the sheets of shielding preferably have an end edge parallel to the axis central stacking of deionization sheets and arranged substantially at this axis.
  • a sheet-free alternative deionization would consist of chambers whose layout goes widening, so that the arc lengthens enough to reach a voltage higher than that of the network.
  • the shield sheets are surface limited so that the arc is maintained at ends of the interrupting chambers in which it is supposed to be off, due to looping of the magnetic field - at the ends shielding sheets-, via deionization sheets whose coating is chosen for its permeability.
  • the orientation of the magnetic field at this place causes braking of the arc.
  • the invention also relates to a modular electrical device containing a blowing device as described above.
  • the electrical circuit chosen for this description which is however only one possible example to which the invention applies, consists essentially of a coil induction (1), two connection terminals (2, 3), a fixed contact (4), a movable contact (5) and a bimetallic strip (6).
  • terminal (2) is connected to the bimetallic strip (6) via a flexible conductive braid (7).
  • the coil (1) is also connected to said bimetallic strip (6) via a second flexible braid (8) arranged at one of its ends, the other end being connected to the fixed contact (4), which is extended by a sheet of arc conduction (9) (see below).
  • the movable contact (5) is connected to the by means of another flexible conductive braid (10) to a sheet (11) the lower part (12) also serves as an arc conduction sheet, then that the upper part is connected to the second terminal (3).
  • Figure 2 adds to this electrical circuit the part of the magnetic circuit relating to triggering, comprising mainly a core (13) formed for example of a stack of sheets from which two branches (14, 15) in a U-shaped configuration surmounted by a pallet (16) mobile having a variable length air gap.
  • This palette (16) which can optionally form both the bimetallic strip (6) and a moving part of the magnetic circuit, represents an important element of both magnetic and electric circuits.
  • the nucleus (13) can also be massive.
  • the bimetallic strip can of course be functionally separated from the movable pallet (16).
  • two shielding sheets (17, 18) also make it possible to channel the field lines produced by the coil (1).
  • the dark hatching (close together) appearing on the turns of the coil (1) shows the motor blowing zone, corresponding to a magnetic field oriented so that the magnetic forces repel the arc towards the extinguishing chambers limited by the stacks of deionization plates (24, 25).
  • the clear hatching (spaced) shows the arc braking area, at external loopback level of the field.
  • the inversion of the blowing direction due to the looping of the magnetic field at the outer limits of the sheet metal shielding is also used to avoid arcing in particular towards the lock (hatching arranged on the left of the diagram at the level of the pivoting head of the movable contact (5)), as well as towards connecting channels made in a middle wall (see Figure 7) in particular for gas recycling purposes (borders arranged on the right part of the figure).
  • Figures 6a to 6e show the progression of the electric arc and the current loop (B2) which it constitutes.
  • the moving contact (5) departs from the fixed contact (4), the arc (21) is created between them (FIG. 6a).
  • the fixed contact (4) and the sheet (11) associated with the movable contact (5) materialize two other loops (B1) and (B3) contiguous to the loop (B2) in which the arc (21) participates, these current loops having moreover common areas two by two.
  • the components appear on the "contacts" side of a wall intermediate (22) provided with reliefs and orifices having functions of gas recycling.
  • the arc conduction sheets (9,12) delimit with an intermediate sheet (23) two arc extinguishing chambers provided stacks of deionization plates (24, 25).
  • the arc has switched from the movable contact (5) to the arc sheet lower (26), and the current is established via the arc plate (11).
  • This arc sheet lower actually comprises a loop-shaped portion (26), which forms a strait with the sheet in the form of a loop connecting the fixed contact (4) and the conduction sheet (9).
  • Section reduction is the loop B4 ( Figure 6c) and secondarily limits the return of the cut to the lock (not shown).
  • all of the loops have a favorable effect on the progression of the arc or arcs.
  • Figure 6e shows the arcs (21, 21 ') divided in the sheets of deionization of the stacks (24, 25) and maintained at this level in these by the favorable orientation of the magnetic field which applies to this location (external loopback to the shielding sheets (17, 18)).
  • Figure 7 is only intended to illustrate a complete product, in the occurrence of a circuit breaker, the housing of which is composed of two half-shells (32, 33) separated by a central wall (22), seen here from the side "Coil".
  • the circuit breaker includes a handle (34) control, connected to a lock (35) to which the movable contact (5) is secured. This lock can flip in the event of an overcurrent (magnetic trip, overload trip (thermal trip) or manual opening via the handle (34).

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP00440253A 2000-09-25 2000-09-25 Magnetische Blasvorrichtung für Lichtbogen Withdrawn EP1191567A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00440253A EP1191567A1 (de) 2000-09-25 2000-09-25 Magnetische Blasvorrichtung für Lichtbogen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00440253A EP1191567A1 (de) 2000-09-25 2000-09-25 Magnetische Blasvorrichtung für Lichtbogen

Publications (1)

Publication Number Publication Date
EP1191567A1 true EP1191567A1 (de) 2002-03-27

Family

ID=8174165

Family Applications (1)

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EP00440253A Withdrawn EP1191567A1 (de) 2000-09-25 2000-09-25 Magnetische Blasvorrichtung für Lichtbogen

Country Status (1)

Country Link
EP (1) EP1191567A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012208573A1 (de) * 2012-05-22 2013-11-28 Siemens Aktiengesellschaft Lichtbogen-Löschvorrichtung und Schutzschaltgerät
CN117321716A (zh) * 2021-05-21 2023-12-29 索克迈克股份有限公司 配备磁吹灭弧装置的电切断模块和包括该模块的电切断设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1179627B (de) * 1961-01-24 1964-10-15 Weber A G Fabrik Elektrotechn Ein- oder mehrpoliger Selbstschalter
FR2204872A1 (de) * 1972-10-30 1974-05-24 Legrand Sa
GB2062966A (en) * 1979-11-10 1981-05-28 Terasaki Denki Sangyo Kk Circuit interrupter
US4611188A (en) * 1984-03-09 1986-09-09 Terasaki Denki Sangyo Kabushiki Kaisha Circuit breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1179627B (de) * 1961-01-24 1964-10-15 Weber A G Fabrik Elektrotechn Ein- oder mehrpoliger Selbstschalter
FR2204872A1 (de) * 1972-10-30 1974-05-24 Legrand Sa
GB2062966A (en) * 1979-11-10 1981-05-28 Terasaki Denki Sangyo Kk Circuit interrupter
US4611188A (en) * 1984-03-09 1986-09-09 Terasaki Denki Sangyo Kabushiki Kaisha Circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012208573A1 (de) * 2012-05-22 2013-11-28 Siemens Aktiengesellschaft Lichtbogen-Löschvorrichtung und Schutzschaltgerät
CN117321716A (zh) * 2021-05-21 2023-12-29 索克迈克股份有限公司 配备磁吹灭弧装置的电切断模块和包括该模块的电切断设备

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