EP1041596B1 - Thermische Auslöseeinrichtung für Leitungsschutzschalter - Google Patents
Thermische Auslöseeinrichtung für Leitungsschutzschalter Download PDFInfo
- Publication number
- EP1041596B1 EP1041596B1 EP00103371A EP00103371A EP1041596B1 EP 1041596 B1 EP1041596 B1 EP 1041596B1 EP 00103371 A EP00103371 A EP 00103371A EP 00103371 A EP00103371 A EP 00103371A EP 1041596 B1 EP1041596 B1 EP 1041596B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- triggering device
- thermal triggering
- thermal
- chamber portion
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 210000003734 kidney Anatomy 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
Definitions
- the invention relates to a thermal tripping device for circuit breaker.
- Such a thermal tripping device is already known from the according to Art. 54 (3) and (4) EPC as state of the art novelty EP-A-0 926 694 disclosed.
- this device is biased against its actuation direction Plunger provided, the electromagnetically at an overcurrent to stop at a section 10a of a pivot lever 10 can be disengaged.
- a Bimetallic snap disk arrangement is provided, which does not snap on the Actuating tappet, but acts directly on a portion of the actuating lever.
- thermo tripping device for a circuit breaker known in which an indirect heating for a bimetallic snap disk made by the fact that the originating from an excitation coil heat over the well thermally conductive housing of the support body is transmitted.
- thermal Tripping device to realize a tripping security in the predetermined limit band,
- a high production cost in the field of excitation coil is required.
- the invention is based on the object, a thermal tripping device for a Circuit breaker of the type mentioned in terms of a comparatively lower production costs and a relatively shorter response time.
- thermo trip device for circuit breaker with a in a support body slidably mounted and out of this by an extended Chamber section above actuating tappet made available the thermally directly by means of one in the chamber section edge held bimetallic snap disk disengaged is, wherein in the chamber portion for thermal activation flat heating element for the bimetallic snap disk arrangement is provided.
- This is an extremely easy producible and to be designed effective heating by reaches a heating element, which selectively transfers its heat to the Bimetallschnappulation can deliver and thus the response improved.
- This planar heating element has according to a preferred embodiment the invention, an electrical resistance heater and can be trained thereby extremely small building.
- the heating element is according to a further embodiment of Invention facing away from the bimetallic snap disk assembly Side arched to match the shape of the bimetallic snap ring assembly to be adjusted as far as possible before triggering.
- the terminal lugs preferably at the edge of the disk-shaped heating element formed and preferably extend parallel to each other perpendicular to the back of the heating element. hereby arise particularly compact installation conditions for mounting of the heating element in the chamber section, wherein the planar Heating element in the chamber portion preferably by means of held a back chamber wall guided terminal lugs is.
- the attachment of the heating element can be either in Area of the terminal lugs themselves or by means of a lid edge be provided, which is the chamber portion of the support body closes.
- this lid also serves as a holder on the edge the Bimetallschnappulation such that the Bimetallschnappulation can perform their snap action.
- planar heating element is according to another preferred Embodiment of the invention prior to triggering of the bimetallic snap disk arrangement evenly spaced to a good To achieve heat transfer.
- the planar Heating element with recesses formed such that between the connection lugs symmetrical current paths exist Preferably has the heating element between the terminal lugs at least two perforations, preferably with two kidney-shaped Recesses and one in the middle between the terminal lugs lying transverse web formed with central skillslrittring are.
- an overcurrent release 10 is shown in section, the used in circuit breakers.
- the overcurrent release 10 consists of a rotationally symmetrical hollow cylindrical Supporting body 11, to which an enlarged diameter Chamber section 12 connects, the open end by means of a hollow lid 13 is closed.
- a ram guide core 14 made of iron with a central bore in the region of the axis of symmetry of the support body 11 fixed in which a plunger 15 mounted longitudinally movable is.
- a plunger 15 mounted longitudinally movable is.
- At the rear end of the support body 11 is in this one longitudinally movable armature 16 with a bore for receiving the provided at the rear end of the plunger and a fastening spring 17, which with its other end to the ram guide core 14 is supported.
- a disc Bimetallic snap disk assembly 18 mounted on the edge, the in their midst to a formed on the plunger 15 bead 19 at Snap over to the intended release attacks.
- a disk-shaped heating element 21 is stationary in attached to the chamber section 12.
- the planar heating element 21 has edge-shaped terminal lugs 22 and 23, the perpendicular to the back of the heating element to a not extend shown electrical connection. Is omitted in Fig. 1 for simplicity, a field winding through which an electromagnetic triggering by movement of the armature 13th is provided.
- Fig. 2 are omitting the plunger 15 and the receiving chamber 12 forward final cover 13 the assignment between the bimetallic snap disk assembly 18 and the planar heating element 21 shown schematically. It is also, as shown in Fig. 4 that the flat heating element 21 has a curvature directed to its rear, the 18 prior to release of the bimetallic disc approximately the curvature the bimetallic disc 18 corresponds. The distance a between the Bimetal disc assembly 18 and the planar heating element 21st is almost constant.
- the sectional view shown in Fig. 2 the planar heater is only schematic and may instead have a design as shown in Fig. 3 in Shown top view.
- the flat heating element 21 has a circular disk-shaped Design in which the terminal lugs 22 and 23 are formed on the edge side and the surface of the heating element 21st a central passage opening 24 for the plunger 15 with a surrounding ring 25 and laterally extending webs 26 has. Between the terminal lugs 22 and 23 are symmetrical, approximately kidney-shaped recesses 28 and 29 formed.
- recesses is not on this illustrated embodiment limited but can also be more and different have configured recesses.
- the Thickness of the flat heating element over its area between the terminal lugs 22 and 23 vary to the respective horrsutzungsbedürfnissen and the desired optimal Surface radiation with the greatest possible radiation effect to wear.
- the resistance of the heating element is suitable to design the heating power required by the bimetal.
- the bimetallic snap disc assembly is constantly on the entire area heated and therefore reaches with very little Delay time the temperature of the heating element, thereby triggering is safely reached in the predetermined boundary bands. In this case, the heating element during the triggering process is not moved, and due to the simple construction of the heating element can the assembly with a simple joining realize.
Landscapes
- Thermally Actuated Switches (AREA)
- Breakers (AREA)
- Push-Button Switches (AREA)
Description
- Fig. 1
- einen Längsschnitt durch einen Überstromauslöser für Leitungsschutzschalter mit einer erfindungsgemäßen Ausbildung einer thermischen Auslöseeinrichtung;
- Fig. 2
- eine schematisierte Schnittdarstellung der thermischen Auslöseeinrichtung im Bereich des Kammerabschnitts;
- Fig. 3
- eine Vorderansicht auf ein flächiges Heizelement; und
- Fig. 4
- eine linke Seitenansicht auf das in Fig. 3 gezeigte flächige Heizelement.
Claims (11)
- Thermische Auslöseeinrichtung für Leitungsschutzschalter mit einem mittig in einem Tragkörper (11) verschiebbar gelagerten und aus diesem durch einen erweiterten Kammerabschnitt (12) vorstehenden Betätigungsstößel (15), wobei in dem Kammerabschnitt (12) zur thermischen Auslösung ein flächiges Heizelement (21) für eine Bimetall-Schnappscheibenanordnung (18) vorgesehen ist, und wobei der Betätigungsstößel (15) thermisch mittels der im Kammerabschnitt (12) randseitig gehaltenen Bimetall-Schnappscheibenanordnung (18) ausrückbar ist.
- Auslöseeinrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß das Heizelement (21) eine elektrische Widerstandsheizung aufweist. - Auslöseeinrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das Heizelement (21) zu der der Bimetall-Schnappscheibenanordnung (18) abgewandten Seite gewölbt ist. - Auslöseeinrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß das flächige Heizelement (21) scheibenförmig mit einem mittigen Durchlaß (24) für den Betätigungsstößel (15) und mit diametral gegenüberliegenden randseitigen elektrischen Anschlußfahnen (22, 23) gebildet ist. - Auslöseeinrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß die Anschlußfahnen (22, 23) an dem Rand des scheibenförmigen Heizelementes (21) angeformt sind und sich vorzugsweise parallel zueinander senkrecht zur Rückseite des Heizelements (21) erstrecken. - Auslöseeinrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß das Heizelement (21) in dem Kammerabschnitt (12) mittels eines diesen verschließenden hohlen Deckels (13) befestigt ist. - Auslöseeinrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß das Heizelement (21) in dem Kammerabschnitt (12) verdrehsicher mittels der durch eine rückseitige Kammerwand (20) geführten Anschlußfahnen (22, 23) gehalten ist. - Auslöseeinrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß das Heizelement (21) von der Bimetall-Schnappscheibenanordnung (18) vor deren Auslösung gleichmäßig beabstandet ist. - Auslöseeinrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß das flächige Heizelement (21) mit Ausnehmungen derart versehen ist, daß zwischen seinen Anschlußfahnen (22, 23) symmetrische Stromwege vorliegen. - Auslöseeinrichtung nach Anspruch 9,
dadurch gekennzeichnet, daß zwischen den Anschlußfahnen (22, 23) wenigstens zwei Durchbrechungen (28, 29) vorgesehen sind. - Auslöseeinrichtung nach Anspruch 10,
dadurch gekennzeichnet, daß das Heizelement (21) mit zwei nierenförmigen Ausnehmungen (28, 29) und einem in der Mitte zwischen den Anschlußfahnen (22, 23) liegenden Quersteg (26, 27) mit mittigem Durchlaßring (24, 25) gebildet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19914479A DE19914479A1 (de) | 1999-03-30 | 1999-03-30 | Thermische Auslöseeinrichtung für Leitungsschutzschalter |
| DE19914479 | 1999-03-30 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1041596A2 EP1041596A2 (de) | 2000-10-04 |
| EP1041596A3 EP1041596A3 (de) | 2002-01-16 |
| EP1041596B1 true EP1041596B1 (de) | 2004-01-14 |
Family
ID=7902991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00103371A Expired - Lifetime EP1041596B1 (de) | 1999-03-30 | 2000-02-23 | Thermische Auslöseeinrichtung für Leitungsschutzschalter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1041596B1 (de) |
| AT (1) | ATE257975T1 (de) |
| DE (2) | DE19914479A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR940002671B1 (ko) * | 1990-04-06 | 1994-03-28 | 가부시끼가이샤 히다찌세이사꾸쇼 | 과부하 보호장치 |
| DE4224046C2 (de) * | 1992-07-21 | 1994-07-07 | Elektroelement Izlake D D | Überstromauslöser für Schutzschaltgeräte |
| DE4313207A1 (de) * | 1993-04-22 | 1994-10-27 | Kopp Heinrich Ag | Leitungsschutzschalter |
| DE4336073A1 (de) * | 1993-10-22 | 1995-04-27 | Abb Patent Gmbh | Thermischer Überstromauslöser für ein elektrisches Schaltgerät |
| DE19750875C1 (de) * | 1997-11-18 | 1999-03-18 | Hans Arnhold | Überstromauslöser für Schutzschalter |
| FR2772980B1 (fr) * | 1997-12-19 | 2000-01-21 | Schneider Electric Sa | Dispositif de declenchement magneto-thermique et disjoncteur equipe de ce dispositif |
-
1999
- 1999-03-30 DE DE19914479A patent/DE19914479A1/de not_active Withdrawn
-
2000
- 2000-02-23 EP EP00103371A patent/EP1041596B1/de not_active Expired - Lifetime
- 2000-02-23 AT AT00103371T patent/ATE257975T1/de not_active IP Right Cessation
- 2000-02-23 DE DE50005000T patent/DE50005000D1/de not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE50005000D1 (de) | 2004-02-19 |
| ATE257975T1 (de) | 2004-01-15 |
| DE19914479A1 (de) | 2000-10-05 |
| EP1041596A3 (de) | 2002-01-16 |
| EP1041596A2 (de) | 2000-10-04 |
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