EP0552112B1 - Kombinierte Schutzschalter und Nulleiter-Trennvorrichtung - Google Patents

Kombinierte Schutzschalter und Nulleiter-Trennvorrichtung Download PDF

Info

Publication number
EP0552112B1
EP0552112B1 EP19930420006 EP93420006A EP0552112B1 EP 0552112 B1 EP0552112 B1 EP 0552112B1 EP 19930420006 EP19930420006 EP 19930420006 EP 93420006 A EP93420006 A EP 93420006A EP 0552112 B1 EP0552112 B1 EP 0552112B1
Authority
EP
European Patent Office
Prior art keywords
neutral
circuit breaker
disconnector
contact
combined 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.)
Expired - Lifetime
Application number
EP19930420006
Other languages
English (en)
French (fr)
Other versions
EP0552112A1 (de
Inventor
Jean-Luc Ribas
Didier Lebouc
Jean-Louis Ducroquet
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.)
Schneider Electric SE
Original Assignee
Schneider Electric SE
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0552112A1 publication Critical patent/EP0552112A1/de
Application granted granted Critical
Publication of EP0552112B1 publication Critical patent/EP0552112B1/de
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
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • 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
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor

Definitions

  • the invention relates to a combined circuit breaker and neutral disconnector comprising a side by side assembly of a base block containing a circuit breaker, and an auxiliary block for housing a neutral disconnector, the two blocks being formed by insulating housings of conjugate profiles allowing the joining of the large lateral faces of the circuit breaker and the neutral disconnector, the circuit breaker having phase contacts actuated by a mechanism controlled by a trip device and a first lever, and the neutral disconnector comprising contacts neutral, whose movable bridge-shaped contact is stressed, on the one hand in the closed position by a contact pressure spring, and on the other hand in the open position by the antagonistic action of a controlled cam by a second lever.
  • the assembly is arranged to authorize the opening of the phase contacts of the circuit breaker, before the separation of the neutral contacts of the neutral disconnector.
  • the neutral disconnector must be closed before that of the circuit breaker. The intervention of the circuit breaker following a fault operates without interfering with the second lever. The neutral switch can remain in the closed state, in the absence of manual actuation of the second lever.
  • the problem posed by this type of combined circuit breaker and neutral disconnector is the harmful influence of short-circuit currents on the behavior of the neutral disconnector when the latter is in the closed state, ie neutral not cut .
  • the movable neutral contact is subjected on the one hand to the first electrodynamic repulsion forces generated in the auxiliary unit, and to second electromagnetic forces coming from the main unit. The action of these forces subjects the neutral contact bridge to stresses favorable to instability with the formation of multiple arcs, and premature wear of the neutral disconnector.
  • the object of the invention is to improve the electrical resistance of a combined circuit breaker and neutral disconnector subject to the influence of a short-circuit current.
  • the combined circuit breaker and neutral disconnector according to the invention is characterized in that the auxiliary block of the neutral disconnector contains magnetic means arranged in the vicinity of the separation zone of the neutral contacts and facing the arcing zone of the circuit breaker adjacent, to ensure when a short-circuit current appears, a first shielding effect of the neutral disconnector against the parasitic electromagnetic field generated in the circuit breaker, and a second effect of magnetic attraction of the bridge of neutral contact against the fixed neutral contacts, so as to permanently maintain the closed state of the neutral disconnector in the absence of actuation of the second lever in the opening direction.
  • the magnetic means comprise at least one metal pole piece made of ferromagnetic material.
  • the combination of the two shielding and magnetic attraction effects is favorable for a stable multidirectional maintenance of the movable neutral contact, when the neutral disconnector is in the closed state, and traversed by a short-circuit current.
  • the neutral contact bridge has an inverted U-shaped central part inside which extends the contact pressure spring, and two extensions bent at right angles in opposite directions, and each equipped with a contact part cooperating in the closed position with the corresponding fixed neutral contact.
  • Two pole pieces are positioned in cells of the housing on either side of a guide passage of the central part of the contact bridge.
  • the pole pieces occupy the entire width of the housing, and are each formed either by a one-piece mass or by a stack of sheets.
  • each contact piece of the neutral contact bridge may include a cup in which the fixed fixed neutral contact fits in the closed position of the neutral disconnector.
  • Figure 1 is a schematic perspective view of a combined circuit breaker and neutral switch in the adjoining position.
  • Figure 2 shows a plan view of Figure 1.
  • Figure 3 shows an elevational view of the neutral switch according to the invention, the housing cover being removed.
  • a combined circuit breaker and neutral disconnector designated by the general reference 10, comprises an assembly side by side of a base block 12 containing a circuit breaker 13, and of an auxiliary block 14 of housing d 'a neutral disconnector 16.
  • the circuit breaker 13 and the neutral disconnector 16 are housed in modular insulating boxes 18,20, having conjugate profiles to allow the joining of the large lateral faces of the two blocks 12,14.
  • the housing 20 of the neutral disconnector 16 has latching tabs 22 allowing the attachment of the auxiliary unit 14 to the right part of the base unit 12 during assembly by the customer of the handset 10.
  • each box 18,20 is provided with a fixing base 24 allowing the assembly of the handset 10 on a support rail (not shown).
  • the attachment to the rail is effected by means of a lock 26 integral with the circuit breaker 13.
  • the circuit breaker 13 conventionally comprises a pair of separable contacts, an opening and closing control mechanism manually actuated by a first lever 28, an arc extinguishing chamber, and a thermomagnetic trip device arranged to trip the mechanism when the current flowing through the circuit breaker exceeds a predetermined threshold.
  • a circuit breaker is described in French patent 2,616,583 of the applicant.
  • the circuit breaker 13 shown in Figures 1 and 2 is of the unipolar type, but it is clear that the circuit breaker can be multipolar. In the latter case, the base block 12 comprises additional modules 30, 32 (in dotted lines in FIG. 2), of identical structures.
  • the circuit breaker 13 further comprises a pair of phase terminals 34, 36 arranged on the small opposite lateral faces of the housing 18, the downstream phase terminal 36 is associated with a phase bar 38 for supplying the circuit breaker.
  • the other upstream terminal 34 of phase is intended to receive a line cable (not shown).
  • the phase bar 38 extends perpendicular to the junction plane of the two blocks 12,14.
  • the neutral disconnector 14 (FIG. 3) comprises a first fixed neutral contact 40 connected to an upstream neutral terminal 42 by a first conductor 44, and a second fixed neutral contact 46 connected by a second conductor 48 to a downstream terminal 50 neutral.
  • a contact bridge 52 movable in translation cooperates with the two fixed contacts 40, 46, and is biased in the closed position by a contact pressure spring 54, bearing on a protuberance 56 at the base of the housing 20.
  • the neutral contact bridge 52 has a central part in the shape of an inverted U, inside which the spring 54 extends.
  • the central part is extended by two extensions curved at right angles in opposite directions, and each equipped a contact part cooperating with the corresponding fixed neutral contact 40,46.
  • Two ribs 58.60 coming from molding with the insulating housing 20 form a passage 59 for guiding the contact bridge 52 during its translational travel between the open and closed positions.
  • the handle 64 comprises a gripping element 66 accessible from the outside by the operator, and an internal part in the form of a cam 68 intended to push the contact bridge 52 towards the open position during a pivoting of the handle 64 clockwise (see arrow).
  • the line of action of the spring 54 passes through the axis 62, and extends parallel to the travel of movement of the movable contact bridge 52, along the guide passage 59.
  • the gripping element 66 of the handle 64 comprises a notch 70 for introducing a screwdriver, and a projection 72 capable of interfering with the trajectory of the first handle 28.
  • the assembly is arranged to authorize on the one hand the cutting of the phase contacts, before the separation of the neutral contacts 40,52,46, and on the other hand the closing of the latter before that of the phase contacts.
  • Manual actuation by the first lever 28 or automatic actuation by the release of the phase contacts of the circuit breaker 13 can be operated while the neutral contacts 40, 52, 46 remain closed.
  • Two metal pole pieces 74,76 made of ferromagnetic material are positioned in cells of the housing 20 of the neutral disconnector 16 on either side of the corridor 59 for guiding the contact bridge 52, and opposite the fixed neutral contacts 40.46 along the conductors 44.48.
  • the pole pieces 74, 76 occupy substantially the entire width of the housing 20, and are located at the level of the arc zone of the circuit breaker 13 adjacent.
  • the arc zone mainly comprises the arc-forming chamber, and the arc extinguishing chamber of the circuit breaker 13.
  • the pole pieces 74, 76 are formed either by a monobloc mass of steel, or by a stack of sheets .
  • pole pieces 74, 76 make it possible to guarantee the good behavior of the contacts of the neutral disconnector, in particular to avoid repulsion of the neutral contacts in the closed position of the neutral disconnector.
  • the two contact parts of the contact bridge 52 are advantageously shaped into cups 78 into which the bosses of the fixed neutral contacts 40, 46 penetrate when the neutral disconnector 16 is in the closed position.
  • the interlocking of the contacts resulting from the cooperation of the bosses with the corresponding cups 78 also opposes the transverse displacement of the contact bridge 52 subjected to the action of the parasitic magnetic field of the circuit breaker 13.
  • the current flowing through the neutral disconnector 16 in the closed position creates an electromagnetic polarization field capable of causing magnetization of the two pole pieces 74,76. This results in a second magnetic attraction effect of the contact bridge 52 against the two fixed neutral contacts 40.46 to against the forces of electrodynamic repulsion by necking exerted between said contacts.
  • the combination of the two shielding and magnetic attraction effects is essential to maintain the stable hold in all directions of the neutral contact bridge, when the neutral disconnector 16 is in the closed position and subjected to the appearance of a short circuit current.
  • the neutral disconnector 16 remains closed during the short-circuit detection phase by the trip device of the circuit breaker 13. After automatic separation of the contacts of the circuit breaker after tripping, manual action on the second lever 64 makes it possible to open the neutral disconnector 16, for example during an intervention in the event of a breakdown on the line of a receiver.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (7)

  1. Leistungsschalter-Neutralleitertrenner-Kombination, bestehend aus einem Hauptblock (12) mit einem darin enthaltenen Leistungsschalter (13) sowie einem seitlich daran angebauten Hilfsblock (14) zur Aufnahme eines Neutralleitertrenners (16), wobei die beiden Blöcke (12, 14) als Isolierstoffgehäuse (18, 20) mit aneinander angepaßten Profilen ausgebildet sind, die einen Aneinanderbau der großen Seitenflächen des Leistungsschalters (13) und des Neutralleitertrenners (16) ermöglichen, der Leistungsschalter (13) Phasenleiterkontakte umfaßt, die über einen von einem Auslöser sowie von einem ersten Kipphebel (28) angesteuerten Mechanismus betätigt werden und der Neutralleitertrenner Neutralleiterkontakte (40, 46, 52) umfaßt, von denen der brückenförmig ausgebildete bewegliche Kontakt einerseits durch eine Kontaktdruckfeder (54) in Richtung der Einschaltstellung und andererseits durch eine Gegenkraft einer über einen zweiten Kipphebel (64) betätigten Nocke (68) in Richtung der Ausschaltstellung beaufschlagt wird, dadurch gekennzeichnet, daß der Hilfsblock (14) des Neutralleitertrenners (16) magnetische Mittel (74, 76) umfaßt, die in der Nähe der Trennzone der Neutralleiterkontakte (40, 46, 52) und gegenüber der Lichtbogenzone des angrenzenden Leistungsschalters (13) angeordnet sind, um bei Auftreten eines Kurzschlußstroms eine erste Wirkung entsprechend einer Abschirmung des Neutralleitertrenners (16) gegenüber dem im Leistungsschalter (13) erzeugten elektromagnetischen Streufeld und eine zweite Wirkung entsprechend einer magnetischen Anziehung der Neutralleiter-Kontaktbrücke (52) gegen die feststehenden Neutralleiterkontakte (40, 46) zu gewährleisten, derart daß der Neutralleitertrenner (16) ununterbrochen im Einschaltzustand verharrt, solange keine Betätigung des zweiten Kipphebels (64) in Richtung der Ausschaltstellung erfolgt.
  2. Leistungsschalter-Neutralleitertrenner-Kombination nach Anspruch 1, dadurch gekennzeichnet, daß die magnetischen Mittel mindestens ein metallisches Polstück (74, 76) aus einem ferromagnetischen Material umfassen und der den feststehenden Neutralleiterkontakt (40, 46) tragende Leiter (44, 48) zwischen dem entsprechenden Kontaktstück der Neutralleiter-Kontaktbrücke (52) und dem Polstück (74, 76) angeordnet ist.
  3. Leistungsschalter-Neutralleitertrenner-Kombination nach Anspruch 2, dadurch gekennzeichnet, daß die Neutralleiter-Kontaktbrücke (52) einen Mittelabschnitt in Form eines umgekehrten U, in dessen Innerem die Kontaktdruckfeder (54) angeordnet ist, sowie zwei rechtwinklig zurückgebogene, voneinander abgewandte Verlängerungsstücke aufweist, an denen jeweils ein Kontaktstück angebracht ist, welches in der Einschaltstellung mit dem zugeordneten feststehenden Neutralleiterkontakt (40, 46) zusammenwirkt und daß zwei Polstücke (74, 76) in Aussparungen des Gehäuses (20) zu beiden Seiten eines Kanals (59) zur Führung des Mittelabschnitts der Kontaktbrücke (52) angeordnet sind.
  4. Leistungsschalter-Neutralleitertrenner-Kombination nach Anspruch 4, dadurch gekennzeichnet, daß die Polstücke (74, 76) die gesamte Breite des Gehäuses (20) einnehmen und aus jeweils einem einstückigen Block oder einem Blechpaket bestehen.
  5. Leistungsschalter-Neutralleitertrenner-Kombination nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß jedes Kontaktstück der Neutralleiter-Kontaktbrücke (52) eine Einsenkung (78) aufweist, in die der zugeordnete feststehende Neutralleiterkontakt (40, 46) in der Einschaltstellung des Neutralleitertrenners (16) eingreift.
  6. Leistungsschalter-Neutralleitertrenner-Kombination nach Anspruch 3, 4 oder 5, dadurch gekennzeichnet, daß die Wirklinie der Kontaktdruckfeder (54) die Schwenkachse (62) des zweiten Kipphebels (64) kreuzt und in der Symmetrieebene der beiden Polstücke (74, 76) liegt.
  7. Leistungsschalter-Neutralleitertrenner-Kombination nach Anspruch 6, dadurch gekennzeichnet, daß die Nocke (68) zur Ansteuerung der Neutralleiter-Kontaktbrücke (52) einstückig mit dem zweiten Kipphebel (64) ausgeführt ist.
EP19930420006 1992-01-13 1993-01-08 Kombinierte Schutzschalter und Nulleiter-Trennvorrichtung Expired - Lifetime EP0552112B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9200334 1992-01-13
FR9200334A FR2686186B1 (fr) 1992-01-13 1992-01-13 Combine disjoncteur et sectionneur de neutre.

Publications (2)

Publication Number Publication Date
EP0552112A1 EP0552112A1 (de) 1993-07-21
EP0552112B1 true EP0552112B1 (de) 1996-06-12

Family

ID=9425630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930420006 Expired - Lifetime EP0552112B1 (de) 1992-01-13 1993-01-08 Kombinierte Schutzschalter und Nulleiter-Trennvorrichtung

Country Status (3)

Country Link
EP (1) EP0552112B1 (de)
DE (1) DE69303036T2 (de)
FR (1) FR2686186B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19961765B4 (de) * 1999-12-21 2006-02-09 Siemens Ag Elektrisches Installationsgerät mit durchgeschleiftem Neutralleiter und/oder Schutzleiter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952192C (de) * 1952-01-09 1956-11-15 Kloeckner Moeller Elek Zitaets Kontaktanordnung fuer Leistungsschalter
DE1776082A1 (de) * 1968-09-18 1971-06-09 Babcock & Wilcox Ag Einrichtung zur Verfeuerung fluessiger Abfallprodukte
NL192589C (nl) * 1980-01-04 1997-10-03 Abb Componenten B V Schakelautomaat.
FR2570869A1 (fr) * 1984-09-25 1986-03-28 Hager Electro Perfectionnement aux ensembles de contact des interrupteurs a coupure
DE3501314A1 (de) * 1985-01-16 1986-07-17 Siemens AG, 1000 Berlin und 8000 München Mehrpoliger leitungsschutzschalter

Also Published As

Publication number Publication date
FR2686186A1 (fr) 1993-07-16
DE69303036T2 (de) 1996-12-19
EP0552112A1 (de) 1993-07-21
FR2686186B1 (fr) 1994-03-18
DE69303036D1 (de) 1996-07-18

Similar Documents

Publication Publication Date Title
EP0225207B1 (de) Kinematische Übertragungskette zwischen dem Steuermechanismus und den Polen eines elektrischen Lastschalters mit einem gespritzten Isoliergehäuse
EP0064906B1 (de) Mehrpoliger Schutzschalter mit auswechselbarer magnetothermischer Auslöseeinheit
EP0076719B1 (de) Mehrpoliger Schutzschalter mit auswechselbarer Auslöseeinheit
EP0410902B1 (de) Niederspannungs-Hochstromschalter mit Mehrfachkontakten
FR2580426A1 (fr) Disjoncteur pour basse tension avec fonction de commutation pour commande de systeme de gestion d'energie electrique
FR2690563A1 (fr) Disjoncteur débrochable à boîtier moulé.
FR2553929A1 (fr) Mecanisme de commande d'un disjoncteur multipolaire basse tension
EP0042778B1 (de) Einpol- und Nulleiter-Kleinschalter
FR2533363A1 (fr) Disjoncteur electrique a courant alternatif equipe d'un declencheur magnetothermique et d'un organe de commutation statique a telecommande
FR2495825A1 (fr) Disjoncteur multipolaire synchronise, constitue par plusieurs ensembles et comprenant une tige de liaison mutuelle
EP0059118B1 (de) Mehrpoliger elektrischer Schalter mit Strombegrenzungsvorrichtung
JPH03133019A (ja) 回路遮断器
EP0552112B1 (de) Kombinierte Schutzschalter und Nulleiter-Trennvorrichtung
EP0552113B1 (de) Kombinierter Schutzschalter und Nulleiterschalter mit einer Isolationskappe
EP0619592B1 (de) Elektrischer Schutzschalter mit elektrodynamischer Kontaktabstossung und mit Doppellöschkammern
EP0515292B1 (de) Elektromagnetischer Auslöser für einen Schwachstromschalter
EP0505292B1 (de) Phasen- und Nulleiter-Leitungsschutzschalter mit reduziertem Platzbedarf
EP0045672B1 (de) Kleinschalter mit Abschaltung des Nulleiters und des Phasenleiters
FR2581790A1 (fr) Interrupteur disjoncteur a coupure propre
EP0054499B1 (de) Schalter mit Trennung des Nulleiters
EP0602024B1 (de) Betätigungsmechanismus für einen mehrpoligen Fehlerstromschutzschalter mit drehbarer Schaltwelle
EP0099786A1 (de) Zweipoliger Differentialschutzschalter
FR2638017A1 (fr) Interrupteur electrique multipolaire a basse tension pour calibres eleves
EP0097557B1 (de) Nebenschlussstromkreis für den Auslöser eines Leistungsschalters
FR2504725A1 (fr) Disjoncteur a sectionnement de neutre

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE LI

17P Request for examination filed

Effective date: 19931220

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHNEIDER ELECTRIC SA

17Q First examination report despatched

Effective date: 19950914

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE LI

REF Corresponds to:

Ref document number: 69303036

Country of ref document: DE

Date of ref document: 19960718

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

Ref country code: DE

Payment date: 20001214

Year of fee payment: 9

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

Ref country code: CH

Payment date: 20010112

Year of fee payment: 9

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

Ref country code: LI

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

Effective date: 20020131

Ref country code: CH

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

Effective date: 20020131

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: 20020801

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL