EP1488438B1 - Leitungsschutzschalter mit zweipoliger unterbrechung - Google Patents

Leitungsschutzschalter mit zweipoliger unterbrechung Download PDF

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Publication number
EP1488438B1
EP1488438B1 EP03709797A EP03709797A EP1488438B1 EP 1488438 B1 EP1488438 B1 EP 1488438B1 EP 03709797 A EP03709797 A EP 03709797A EP 03709797 A EP03709797 A EP 03709797A EP 1488438 B1 EP1488438 B1 EP 1488438B1
Authority
EP
European Patent Office
Prior art keywords
switching lever
contact
circuit breaker
switch actuating
actuating element
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
EP03709797A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1488438A1 (de
Inventor
Miran Dolinsek
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.)
ETI Elektroelement dd
Original Assignee
ETI Elektroelement dd
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 ETI Elektroelement dd filed Critical ETI Elektroelement dd
Publication of EP1488438A1 publication Critical patent/EP1488438A1/de
Application granted granted Critical
Publication of EP1488438B1 publication Critical patent/EP1488438B1/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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to a circuit breaker with two-pole interruption to protect lines against fault currents, especially against thermal overload and short circuit.
  • circuit breaker for alternating current in use, which interrupt the circuit unipolar. Since such circuit breakers are commonly used in so-called zeroed networks, ie in network systems in which the neutral conductor is grounded on the part of the power company, a break in the neutral conductor in the house installation in case of failure is not required.
  • a circuit breaker with unipolar interruption which has a contact device with a fixed contact and a movable contact, which is biased by a contact spring in its closed position.
  • a manual switch is provided, which is connected via a coupling device with a shift lever, which is biased by a switching spring in its position separating the two contacts.
  • a pawl which is pivotable about the same axis as the shift lever, serves to operatively hold the coupler in engagement with the shift lever so that the switch can be manually opened and closed.
  • An overcurrent release cooperates with the pawl to operate in case of failure, the pawl so that the shift lever is released to be pivoted by the switch spring in its contact interrupting position. In this case, the shift lever must move the movable contact against the force of the contact spring in its interruption position.
  • Document EP 0 691 665 A discloses a circuit breaker according to the preamble of claim 1.
  • the object of the present invention is to design a circuit breaker with a two-pole break so that the tripping forces for two contacts to be interrupted can be applied by a single trigger, so that all functional elements of the circuit breaker can be accommodated in the construction volume of a conventional single-pole circuit breaker.
  • a circuit breaker with a two-pole interruption comprises a first and a second contact device, each of which comprises a fixed contact and a movable contact, wherein the two movable contacts are pivotally mounted about a common pivot axis on a support body and each biased by a contact spring in its closed position are, a shift lever mounted pivotally on the support body, which is spring-biased by the contact springs of the movable contacts in a breaker position, in which he the movable contacts holds in its off position, a switch operating member which is coupled via a coupling device with the shift lever, so that the shift lever is pivotable by means of the switch actuator from its breaker position against the force of the contact springs in a release position and can be held in this, as long as the switch actuator with the Gear lever is coupled, wherein the coupling device comprises a hinged to the switch actuating element coupling element and a pivotally mounted on the shift lever pawl which holds the coupling element depending on the position relative to the shift
  • a single spring per contact point is thus used at the same time as a switching spring, so that the demands for sufficient contact force, tearing force and Entklinkungskraft be achieved for a two-pole switching device skillfully.
  • the contact springs are each supported at one end to the movable contact and with its other end to the shift lever.
  • the shift lever is formed symmetrically to a plane perpendicular to its pivot axis, and that the movable contacts arranged symmetrically with respect to this plane in the region of the axial outer surfaces of the shift lever are, wherein the shift lever in the region of its plane of symmetry has a parallel incision, in which the pawl is pivotally mounted.
  • a particularly expedient development of the invention is characterized in that the switching lever, which is substantially circular in section about its pivot bearing, has a recess extending essentially arcuately around its pivot bearing, and in that the pivot axis of the movable contacts is arranged at such a distance from the pivot bearing of the control lever is that it lies within the outer contour of the shift lever in the arcuate recess, wherein in Outer peripheral portion of the lever for each movable contact a driver element is provided to take the movable contacts in case of failure in their off position.
  • the contact springs are each supported at one end in the region of the outer circumference of the shift lever and with its other end to the movable contact, that the contact springs with their movable contacts facing end portions between each of the driver elements and the Swivel axis of the movable contacts are.
  • a driver spring is provided for the switch actuator to bring the switch actuator after a trip in case of failure in the middle position, wherein the driver spring is made in one piece with a contact spring.
  • a support body 10 is closed with the functional parts thereon by a left and right cup-shaped cover 11, 12.
  • the support body 10 and the two covers 11, 12 are connected together in a manner not shown by means of molded rivet pins.
  • the circuit breaker according to the invention is equipped with two input-side terminals 13 and two output-side terminals 14 (only one of which is shown), which can be configured either as a screw or plug-in terminals.
  • two input-side terminals 13 and two output-side terminals 14 (only one of which is shown), which can be configured either as a screw or plug-in terminals.
  • plug-in terminals it is advantageous if the connection as in the output-side terminal 14 shown in Figure 1 from the front, ie in the field of view of Montierenden after attaching the circuit breaker can be done on a mounting rail, not shown in the distribution box or cabinet.
  • these terminals 14 designed as plug-in terminals are reset, so that there is sufficient space for the connection between a cover plate, not shown, of the distributor box and the connection terminal 14.
  • a trigger 16 is arranged substantially symmetrically to this, which is preferably designed for thermal and magnetic tripping in case of failure.
  • the trigger 16 has a bimetallic disc 17 for thermal tripping and a coil 18 for magnetic tripping.
  • a trigger handle 19 acts, as can be seen particularly clearly in Figures 4a to 4c, with a pawl 20 which is pivotally mounted on a shift lever 21.
  • the shift lever 21, which can be seen particularly well in FIGS. 3 a to 4 c, has an essentially circular-shaped outer contour, is pivotably mounted on a bearing journal 10 provided on the support body 10 and is designed symmetrically to a plane extending perpendicular to its pivot axis.
  • the swivel lever therefore has the same elements on its side, which in FIG. 1 shows the rear side, as on its front side shown in FIG.
  • Figures 4a to 4c which show the shift lever 21 cut, that it has a substantially lying in the plane of symmetry incision, in which the pawl 20 is pivotally supported, and in which the trigger key 19 of the trigger 16 for actuating the pawl 20 can engage.
  • a movable contact 23 on the support body 10 is pivotally mounted on a pivot pin 24.
  • the shift lever 21 has an arcuate recess 21 ', which is arranged so that the or the pivot pin 24 in this recess 21' is or lie so that a pivoting movement of the shift lever is not hindered.
  • the movable contacts 23 are connected via leads 25 to the respective terminal 13. In its closed position, the movable contact 23 bears against a fixed contact 26, of which the one is connected via the coil 18 with its connection terminal 14.
  • the other hard contact which is arranged on the side to be viewed in the back side in FIG. 1 of the support body 10, is connected directly to the associated connection terminal 14.
  • the contact devices of movable contact 23 and fixed contact 26 are each associated with extinguishing chambers 27, of which in turn only the one on the left or right side of the support body 10 is shown arranged.
  • a curved stop web 30 is provided as a driver.
  • the driver element may also have any other suitable shape, which allows a reliable power transmission from the shift lever 21 to the movable contact 23.
  • a coupling element 32 is pivotally connected to the control handle 31, which is held in coupling engagement with the shift lever 21 by means of the pawl 20.
  • the switching handle 31 In order to move the movable contact from the breaker position shown in Figures 3a and 4a in its closed position, the switching handle 31 is moved in Figures 3a and 4a in the counterclockwise direction, so that it via the coupling member 32 that of the pawl 20 in coupling engagement with the Shift lever 21 is held, the shift lever 21 is moved clockwise. Due to the contact spring 28, the movable contact 23 is taken as long until it rests against the fixed contact 26.
  • a follower spring 33 which is mounted on the pin 29 on the shift lever 21 and cooperates with a projection 34 on the handle 31, rotates the handle 31 in an intermediate position, which indicates that the circuit breaker has interrupted the lines due to a fault.
  • the triggering plunger 19 of the trigger 16 is driven so strongly by the magnet armature that not only the unlatching, as described above, is completed, but that via a connecting web 35, against which the latch 21 from the triggering plunger 19 is pressed, the ram force is transmitted to the shift lever 21 and thus to the movable contact 23.
  • an additional acceleration of the movable contacts 23 occurs in the event of a short circuit.
  • control handle 31 For reconnection, the control handle 31 must first be rotated clockwise to pull the coupling member 32 between the pawl 20 and the shift lever 21 until it locks with the pawl 20, as shown in Figure 3a and 4a. Subsequently, the renewed activation takes place as already explained above.
  • the combination of the trigger 16 in conjunction with the lever equipped with a pawl and other functional parts provides a largely tolerance-independent arrangement which does not require any adjustments for operation.
  • FIGS. 5a, 5b, 6a, 6b and 7a, 7b In this case, components which are identical to those of the first embodiment are not described again.
  • a hammer 40 is provided which, like Figures 5a and 5b show two Strikes 42 and two guide cheeks 43 having a receiving space formed therebetween 44 for a support body 10 formed on the guide wall.
  • the guide cheeks 43 at its one end bearing central portion 45 of the hammer 40 has at its other end an extension or nose 46 which forms a shoulder or step 47 with the central portion 46.
  • the nose 46 of the hammer 40 is performed as the pawl 20 in the recess in the shift lever 21.
  • the striking lever 40 is mounted between the shift lever 21, the supporting body 10 and the movable contacts 23 in such a way that it partially surrounds the middle pin 45 and the extended nose 46 about the bearing pin 24 of the movable contacts 23 herumerstreckt while the flaps 42 on a projection 23 'of the movable contacts 23 in abutment.
  • a guide wall accommodated between the guide cheeks 43 of the hammer 40 can have a corresponding guide or cam surface.
  • an impact lever 40 is provided as an additional special element of the switching mechanism, via which the trigger plunger 19 of the trigger 16 acts on the movable contacts 23.
  • the hammer 40 is formed symmetrically to the center plane of the circuit breaker.

Landscapes

  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Mechanisms For Operating Contacts (AREA)
EP03709797A 2002-03-18 2003-03-18 Leitungsschutzschalter mit zweipoliger unterbrechung Expired - Lifetime EP1488438B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10211905 2002-03-18
DE10211905A DE10211905A1 (de) 2002-03-18 2002-03-18 Leitungsschutzschalter mit zweipoliger Unterbrechung
PCT/EP2003/002817 WO2003079389A1 (de) 2002-03-18 2003-03-18 Leitungsschutzschalter mit zweipoliger unterbrechung

Publications (2)

Publication Number Publication Date
EP1488438A1 EP1488438A1 (de) 2004-12-22
EP1488438B1 true EP1488438B1 (de) 2007-01-24

Family

ID=27815731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03709797A Expired - Lifetime EP1488438B1 (de) 2002-03-18 2003-03-18 Leitungsschutzschalter mit zweipoliger unterbrechung

Country Status (7)

Country Link
EP (1) EP1488438B1 (es)
CN (1) CN100356494C (es)
AT (1) ATE352857T1 (es)
AU (1) AU2003214137B9 (es)
DE (2) DE10211905A1 (es)
ES (1) ES2279099T3 (es)
WO (1) WO2003079389A1 (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011112159A1 (en) 2010-03-08 2011-09-15 Eti Elektroelement D.D. Protective electric switch
WO2016108761A1 (en) 2014-12-29 2016-07-07 Nela Razvojni Center Za Elektroindustrijo In Elektroniko, D.O.O. Device for protecting electric circuits against electric overload and indicating each reason for interruption

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691665A1 (de) * 1994-07-08 1996-01-10 ABBPATENT GmbH Hauptsicherungsautomat
EP1329923A2 (de) * 2002-01-21 2003-07-23 Prodex Technologie GmbH Selbstschalter mit vereinfachtem Aufbau

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7508649U (de) * 1974-05-14 1975-08-28 Kopp H Hochleistungs-Selbstschalter
DE4116454A1 (de) * 1991-05-18 1992-11-19 Licentia Gmbh Mechanismus fuer einen selbstschalter
FR2723470A1 (fr) * 1994-08-04 1996-02-09 Legrand Sa Disjoncteur
DE19919420A1 (de) * 1999-04-28 2000-11-02 Siemens Ag Schutzschalteinrichtung, beispielsweise Leitungsschutzschalter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691665A1 (de) * 1994-07-08 1996-01-10 ABBPATENT GmbH Hauptsicherungsautomat
EP1329923A2 (de) * 2002-01-21 2003-07-23 Prodex Technologie GmbH Selbstschalter mit vereinfachtem Aufbau

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011112159A1 (en) 2010-03-08 2011-09-15 Eti Elektroelement D.D. Protective electric switch
WO2016108761A1 (en) 2014-12-29 2016-07-07 Nela Razvojni Center Za Elektroindustrijo In Elektroniko, D.O.O. Device for protecting electric circuits against electric overload and indicating each reason for interruption

Also Published As

Publication number Publication date
AU2003214137B2 (en) 2006-03-16
EP1488438A1 (de) 2004-12-22
WO2003079389A1 (de) 2003-09-25
AU2003214137B9 (en) 2006-09-28
DE10211905A1 (de) 2004-04-15
DE50306378D1 (de) 2007-03-15
ATE352857T1 (de) 2007-02-15
CN1653573A (zh) 2005-08-10
AU2003214137A1 (en) 2003-09-29
ES2279099T3 (es) 2007-08-16
CN100356494C (zh) 2007-12-19

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