EP0410258A2 - Interrupteur À©lectromécanique à action rapide - Google Patents

Interrupteur À©lectromécanique à action rapide Download PDF

Info

Publication number
EP0410258A2
EP0410258A2 EP90113583A EP90113583A EP0410258A2 EP 0410258 A2 EP0410258 A2 EP 0410258A2 EP 90113583 A EP90113583 A EP 90113583A EP 90113583 A EP90113583 A EP 90113583A EP 0410258 A2 EP0410258 A2 EP 0410258A2
Authority
EP
European Patent Office
Prior art keywords
current
magnetic
contact
switch
coil
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
EP90113583A
Other languages
German (de)
English (en)
Other versions
EP0410258B1 (fr
EP0410258A3 (en
Inventor
Fritz Dipl.-Phys. Pohl
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
Siemens Corp
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
Publication of EP0410258A2 publication Critical patent/EP0410258A2/fr
Publication of EP0410258A3 publication Critical patent/EP0410258A3/de
Application granted granted Critical
Publication of EP0410258B1 publication Critical patent/EP0410258B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H77/06—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 electromagnetic opening
    • 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
    • H01H77/107—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 the blow-off force generating means, e.g. current loops
    • H01H77/108—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 the blow-off force generating means, e.g. current loops comprising magnetisable elements, e.g. flux concentrator, linear slot motor

Definitions

  • the invention relates to an electromechanical high-speed switch, preferably with a self-closing contact system, which is arranged in series with a circuit breaker and whose movable contacts arranged relative to one another form at least one switching path.
  • the movable contact is assigned a magnetic drive with a U-shaped magnetic yoke, the legs of which form a slot in which the movable contact is arranged.
  • the middle leg of the magnetic yoke is provided with a magnetic coil.
  • electromechanical quick switches with a self-closing contact system can be used as "back-up" protection in electrical distributions in order to increase the availability of electrical networks.
  • conventional fuses for example house fuses
  • the electrical network fails for some time, possibly a few hours, in the event of a fault.
  • Another application example is the combination, generally the series connection, of this limiter with a circuit breaker.
  • the short-circuit switching capacity of this switch combination is significantly greater than the switching capacity of the circuit breaker, for example a circuit breaker or contactor.
  • the contact opening force can be generated by the short-circuit current and the jxB forces of the magnetic field.
  • a known embodiment of such an electromechanical rapid switch with a self-closing contact system contains a magnetic drive for the movable switch contact with a magnetic yoke, the legs of which form a slot in which the movable switch contact is arranged.
  • the middle one Leg is provided with a magnetic coil.
  • the magnetic drive is arranged in a switching chamber that contains quenching plates.
  • the switching path is arranged outside the magnetic yoke for the magnetic drive.
  • This magnetic drive therefore has practically no influence on the movement of the arc.
  • the solenoid is arranged in series with the switching path and carries the main current. Given the correspondingly large cross section of the turns, this coil therefore requires a relatively large amount of space and has a high power loss (DE-AS 23 60 439).
  • blowing system in the case of an electromechanical high-speed switch with a self-closing contact system which is arranged in series with a circuit breaker, a blowing system can be provided, the coil of which is connected in parallel with the contact system.
  • This known embodiment contains two blow magnets which are connected in series and one of which is provided for the contact system of the limiter and the other for the contact system of the circuit breaker. This series connection of the blow magnets is connected in parallel with the limiter.
  • the blow magnets contain a large number of turns of at least 500 turns and their inductance is correspondingly large.
  • the time constant for field construction is therefore also relatively large and is between 5 and 25 ms. A short switch-off time is therefore not possible with this embodiment (4th International Symposium for "Switching ARC Phenomena), September 22 to 24, 1981, Lodz, pages 151 to 155).
  • the current leads to the fixed contacts can preferably be designed as U-contact pieces, which are arranged such that the current in the conductor part adjacent to the contact is in the opposite direction to the current in the contact bridge has. This current loop supports the arc movement accordingly after the contacts have opened.
  • the number of turns of the magnet coil is dimensioned such that the current generates a sufficient magnetic field for the arc movement. Therefore, at least five turns are preferably selected. On the other hand, the number of turns is not chosen too high, so that the time constant for the build-up of the magnetic field is as small as possible and accordingly the switching time of the switch is also short. The number of turns will therefore not significantly exceed 20.
  • the resistance of the solenoid coil is dimensioned such that the current in the coil in the event of a short circuit after the arc between the switch contacts has been extinguished is only a small fraction of the switch current. This reduced current is extinguished by the circuit breaker arranged in series.
  • FIG. 1 shows a quick switch in longitudinal section and in Figure 2, this switch is schematically illustrated in cross section.
  • the fast switch contains a self-closing double-interrupting contact system 2 with two fixed contacts 3 and 4 and a contact bridge 5, which are designed in such a way that the current 1 in each case in the conductor parts which adjoin the contact pads, which are not shown in the figure , has opposite direction. Due to the Lorentz force of these conductor loops, an arc which arises after the contacts have opened is correspondingly accelerated in the switching chamber and is driven via guide rails 6 and 7 or 8 and 9 into extinguishing plates 10 and 11, which can preferably also be provided with blow-out openings 12 and 13 .
  • the connecting conductors 14 and 15 of the contact system 2 are passed through a housing 16 in an electrically insulated manner.
  • the contact bridge 5 is provided with contact springs 16 and 17, which keep the contact bridge 5 closed. Their spring force is measured according to the rated current of the quick switch. This spring force can be, for example, 8 N for a high-speed switch with a nominal current of 100 A.
  • a magnet drive 20 is assigned to the contact system 2, which contains a U-shaped magnet yoke, of which the middle leg 21 is visible in section in the figure, which is provided with a magnet coil 25 with at least one, preferably several turns.
  • the number of turns is dimensioned such that a sufficient magnetic field for the arc movement and the acceleration of the contact bridge 5 is generated. In particular, it will therefore contain at least five turns.
  • the maximum number of turns is given by the fact that the time of the current rise must be limited. The number of turns will therefore not significantly exceed 20 and in particular will not exceed 10.
  • the magnetic drive 20 also includes an additional drive 30 with a blocking pin 32, the upper end of which is pressed against the contact bridge 5 by means of a positioning spring 34.
  • An armature 36 made of ferromagnetic material is arranged at the lower end of the blocking pin 32 in such a way that in the closed state of the contact bridge 5 a working air gap 38 is formed between the armature 36 and the fixed contacts 3 and 4.
  • the armature 36 is located below the ends of the lateral legs 22 and 23 of the magnetic yoke, which are arranged parallel to the plane of movement of the contact bridge 5.
  • the inner surface of the magnetic yoke facing the contact bridge 5 and the end faces of the lateral legs 22 and 23 are provided with a coating 39, which consists of a refractory material, preferably a temperature-resistant plastic.
  • the surface of the armature 36 facing the fixed contacts 3 and 4 is also provided with electrical insulation 37.
  • a resistor 28 can preferably also be provided, the resistance value of which can be, for a line switch of 380 V and a nominal current of 100 A, for example 200 m, in the case of a quick switch.
  • the contact system 2 When the contact system 2 is closed, the voltage drop is too small, it is not significantly more than 0 V, so that the magnet coil 25 is practically currentless. In this case, the magnetic yoke is practically excited only by the current path with the nominal current I and generates only a small magnetic field. Sufficient current carrying capacity is guaranteed when the contacts are closed.
  • the magnet drive 20 forms with the armature 36 of the additional drive 30 an additional opening aid for the contact bridge 5.
  • the armature 36 is located below the lateral legs 22 and 23 in the stray field of the magnet yoke and is attracted by the magnetized magnet yoke in the event of a short circuit. Due to the width of the working air gap 38, the additional drive 30 can be set to a predetermined opening current. Also prevented this armature 36, that after opening the contact system 2 and the arc migration into the quenching plates 10 and 11, the opened contact bridge 5 can close again as long as a sufficiently high current flows through the magnet coil 25. So that the contact springs 16 and 17 on the one hand do not impede the opening movement of the contact bridge 5, but on the other hand closes the contact system 2 again after the current has been extinguished, a contact force of approximately 3.5 N is set, for example.
  • a forward current of 14 kA is obtained at a voltage of 240 V single-phase and a prospective short-circuit current of, for example, 40 kA with a current amplitude of 57 kA.
  • the arc voltage between the open contacts of the contact system 2 increases to approximately 800 V within one ms and the current commutation to the magnetic coil takes place in approximately 1.5 ms.
  • the current I 1 is limited to approximately 2 kA. This coil current, which is generally only at most 1/5, in particular at most 1/10 of the forward current, is deleted by the circuit breaker.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP90113583A 1989-07-26 1990-07-16 Interrupteur électromécanique à action rapide Expired - Lifetime EP0410258B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3924780 1989-07-26
DE3924780 1989-07-26

Publications (3)

Publication Number Publication Date
EP0410258A2 true EP0410258A2 (fr) 1991-01-30
EP0410258A3 EP0410258A3 (en) 1992-01-02
EP0410258B1 EP0410258B1 (fr) 1995-01-25

Family

ID=6385909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113583A Expired - Lifetime EP0410258B1 (fr) 1989-07-26 1990-07-16 Interrupteur électromécanique à action rapide

Country Status (2)

Country Link
EP (1) EP0410258B1 (fr)
DE (1) DE59008339D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756414A1 (fr) * 1996-11-25 1998-05-29 Schneider Electric Sa Appareil interrupteur electromagnetique
RU2777445C1 (ru) * 2019-01-15 2022-08-04 Цзяньпин ЧЖАО Механизм подвижного контакта автоматического выключателя с двойным разрывом
WO2024188267A1 (fr) * 2023-03-14 2024-09-19 上海诺雅克电气有限公司 Dispositif de commutation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2593085B (en) * 2019-01-15 2023-01-04 Zhao Jianping Movable contact mechanism of double-breakpoint circuit breaker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR636688A (fr) * 1926-10-23 1928-04-14
US3815059A (en) * 1972-12-01 1974-06-04 Westinghouse Electric Corp Circuit interrupter comprising electromagnetic opening means
FR2458887A1 (fr) * 1979-06-07 1981-01-02 Hazemeyer Sa Appareil de coupure de courant electrique du type limiteur d'intensite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756414A1 (fr) * 1996-11-25 1998-05-29 Schneider Electric Sa Appareil interrupteur electromagnetique
RU2777445C1 (ru) * 2019-01-15 2022-08-04 Цзяньпин ЧЖАО Механизм подвижного контакта автоматического выключателя с двойным разрывом
WO2024188267A1 (fr) * 2023-03-14 2024-09-19 上海诺雅克电气有限公司 Dispositif de commutation

Also Published As

Publication number Publication date
DE59008339D1 (de) 1995-03-09
EP0410258B1 (fr) 1995-01-25
EP0410258A3 (en) 1992-01-02

Similar Documents

Publication Publication Date Title
EP3084960B1 (fr) Dispositif de commutation pour le passage et la coupure de courants électriques
CH379639A (de) Elektromagnetischer Vielfachschalter
DE4110335C2 (de) Einrichtung zum Kurzschlußschutz
EP0255016A1 (fr) Elément interrupteur limitant le courant
EP1671344B1 (fr) Procede pour augmenter l'intensite admissible et pour accelerer l'ouverture dynamique de contacts d'interrupteurs de puissance, et appareil de commutation associe
DE69206749T2 (de) Elektrischer Schützschalter mit Einfügung von zusätzlichen Windungen im Magnetauslöser
DE947812C (de) Schalteinrichtung zur Beeinflussung elektrischer Stromkreise, insbesondere Starkstromkreise, mit durch ein Magnetfeld betaetigtem Schaltelement
EP0410258B1 (fr) Interrupteur électromécanique à action rapide
EP1101234B1 (fr) Systeme de protection contre les court-circuits
DE2609708C2 (de) Leitungsschutzschalter mit Lichtbogenanlaufhilfe
DE2508299A1 (de) Elektrisches schaltgeraet
DE8620645U1 (de) Strombegrenzendes Schaltelement
DE2356515C2 (de) Elektrodynamische Schaltvorrichtung wie Relais, Schütz od.dgl.
WO2002075764A1 (fr) Culasse a support de contact fixe monobloc
DE1588891B1 (de) Schutzvorrichtung fuer das thermische element eines ueber stromausloesers
DE3803849C1 (en) High-power switching path for protective switching devices
DE2751452C2 (de) Elektrisches Schaltgerät
EP0410257A1 (fr) Interrupteur électromécanique d'ouverture rapide
DE10343338B4 (de) Schaltvorrichtung mit Kurzschlussstromauslösung und entsprechendes Verfahren
DE2138438A1 (de) U-foermiger eisenrueckschluss, der eine magnetische ausloesespule fuer leitungsschutzschalter umgibt
DE691727C (de) Kleinselbstschalter
EP0556652A2 (fr) Dispositif de protection électromécanique
WO2000022641A1 (fr) Commutateur moyenne tension
DE19702818A1 (de) Schaltanordnung zum Verbinden bzw. Trennen zweier Teilstrecken einer elektrischen Leitung
EP0614207A2 (fr) Appareil de commutation avec un déclencheur thermique et magnétique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19901205

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR IT SE

17Q First examination report despatched

Effective date: 19940208

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT SE

REF Corresponds to:

Ref document number: 59008339

Country of ref document: DE

Date of ref document: 19950309

ITF It: translation for a ep patent filed
ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950717

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EUG Se: european patent has lapsed

Ref document number: 90113583.0

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050716

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080919

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100202