EP0935273A2 - Conducteur fusible pour cartouche à fusible - Google Patents

Conducteur fusible pour cartouche à fusible Download PDF

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Publication number
EP0935273A2
EP0935273A2 EP98122731A EP98122731A EP0935273A2 EP 0935273 A2 EP0935273 A2 EP 0935273A2 EP 98122731 A EP98122731 A EP 98122731A EP 98122731 A EP98122731 A EP 98122731A EP 0935273 A2 EP0935273 A2 EP 0935273A2
Authority
EP
European Patent Office
Prior art keywords
solder
fusible conductor
conductor according
stop layer
area
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Withdrawn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
EP98122731A
Other languages
German (de)
English (en)
Other versions
EP0935273A3 (fr
Inventor
Hans-Werner Rückling
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.)
FERRAZ SHAWMUT GMBH
Original Assignee
Lindner GmbH
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
Priority claimed from DE19846349A external-priority patent/DE19846349A1/de
Application filed by Lindner GmbH filed Critical Lindner GmbH
Publication of EP0935273A2 publication Critical patent/EP0935273A2/fr
Publication of EP0935273A3 publication Critical patent/EP0935273A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member
    • H01H85/11—Fusible members characterised by the shape or form of the fusible member with applied local area of a metal which, on melting, forms a eutectic with the main material of the fusible member, i.e. M-effect devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49107—Fuse making

Definitions

  • the invention relates to a fuse element for an electrical fuse link.
  • Electrical fuse links are used to protect against overcurrents in low-voltage systems used that have a fusible conductor that occurs when it occurs an overcurrent at the narrowest points in a constriction area (the so-called Bottlenecks) melts and the electrical contact is interrupted.
  • a fuse element must meet two requirements: it must both Short-circuit currents safely interrupt in very short switch-off times as well Protect electrical system parts from long-term overloads, whereby small overcurrents, d. H. Amperages up to a predetermined amount are greater than a nominal current, are held for a limited period of time must, d. H. must not lead to tripping within this period (so-called slow switch-off characteristic). For example, with one Fuse with a nominal current of 16A 1.25 times the value of this Maintain nominal current for at least one hour without the Fusible conductor melts.
  • the invention is based on the object, a fuse element for an electrical Specify fuse link with a high reproducibility and characteristic curve stability of the melting behavior even when using a cadmium and lead-free solder is ensured.
  • the fuse element according to the invention contains a band-shaped base body, which is provided with at least one constriction area is and on a plummet in an at least adjacent to the constriction area Solder area is a cadmium and lead-free solder The solder order takes up, and that on the solder side in one on the solder area opposite side at least adjacent to the constriction area Stop area is provided with a first solder stop layer.
  • Cadmium and lead-free means that the inevitably present in the solder Traces or parts have no influence on the technological properties of the Have lots.
  • the first solder stop layer borders at least to the solder order, in particular it at least covers the solder order partially. This causes the solder to flow away across the constriction area particularly effectively prevented.
  • the base body preferably has a recess for receiving the solder application on. This also enables a locally precise application of the soldering order when using a smooth flowing solder.
  • depressions overlap and constriction area at least partially, d. H. at least the depression protrudes partially into the constriction area.
  • the first solder stop layer extends at least up to the edge of the constriction area facing away from the soldering order. This prevents the solder from over the constriction area drains away.
  • constriction area is on the solder side of the base body opposite flat side with a second solder stop layer.
  • the side facing away from the constriction area flows onto the base body in a further advantageous embodiment of the invention in one to the recess adjoining area facing away from the constriction area a third Lotstop Mrs arranged.
  • the solder stop layer preferably consists of a temperature-stable material, in particular from a curable adhesive.
  • a curable adhesive can be manufactured simply applied to the body. Furthermore is it chemically passive towards the material of the base body, d. H. he does not change the material properties of the Basic body. In particular, from a manufacturing point of view Fast curing adhesives provided by UV light.
  • a varnish or a resin can also be provided.
  • a metal preferably aluminum
  • a metallic layer can easily be sprayed on or even flame sprayed.
  • a temperature stable Material made of a metallic oxide can also be used, for example simply by oxidizing the surface of the fuse element.
  • the thickness of the solder stop layer is preferably at least 10 ⁇ m. This is ensures that the melting solder is effectively prevented from flowing apart is.
  • a fuse element provided, which has a constriction area, which is defined by a plurality of in a row arranged transversely to the longitudinal direction of the base body is formed, which have a groove-shaped parallel to this row Well for receiving the soldering order is assigned.
  • the fuse element consists of a band-shaped base body 2, for example made of copper (Cu) or silver (Ag), with a constriction area 4 is provided.
  • the constriction area 4 is separated by two opposite side recesses formed.
  • the base body 2 instructs a soldering area adjacent to the constriction area 4 is on both sides up to the longitudinal or side edges of the base body 2 extending channel-shaped Beading or recess 6, which is a trough for receiving a soldering job 8 forms.
  • the constriction area 4 is on the solder side, i. H. the one facing the soldering order 8 Flat side of the base body 2 in at least on this flat side adjacent to the constriction area and opposite the solder area Stop area with a first solder stop layer adjoining the solder application 8 10 provided.
  • the first solder stop layer 10 partially outside or overall outside of the constriction area 4, but adjacent to the constriction area Arrange 4 as shown in dashed lines in Fig.1. It is important that the solder has a sufficient amount in the narrowing area 4 when melting remains. It is therefore to keep the required amount of solder as small as possible of advantage, the first solder stop layer 10 into the constriction area 4 to extend to solder order 8.
  • the solder application 8 and the first solder stop layer 10 border at the narrowest point 12 of the constriction area 4 to each other.
  • the narrowest point 12 falls in the embodiment with the center of the constriction area 4 together.
  • there are fundamentally other forms of the constriction area 4 are also conceivable, as shown for example in DE 32 39 903 C2.
  • constriction area 4 and the recess 6 overlap in such a way that the narrowest point 12 with the edge of the depression facing the constriction region 4 6 coincides.
  • the depth T of the recess 6 is a thickness of the base body 2 between 0.1 and 0.2 mm about 1.2 mm.
  • Your Width B is approximately 3 mm with a width E of the constriction area 4 of about 2.5 mm.
  • the first solder stop layer 10 extends from the narrowest point 12 up to the limit of the constriction area 4 facing away from the soldering job 8, see above that the width L of the first solder stop layer 10 is half as large in the exemplary embodiment is like the width E of the constriction area 4 and in the exemplary embodiment approximately Is 1.25 mm.
  • the recess 6 is a trough or cavity for receiving of the solder order 8 forms.
  • solder order 8 are preferably soft, especially cadmium and lead-free soft solders, for example pure tin (Sn 99.9) or a tin-bismuth alloy (for example SnBi 87/13).
  • solder Fluxes for example solder oil, or their residues remain on the fuse element and are not shown in the figures for reasons of clarity.
  • Suitable as temperature-stable materials for the first solder stop layer 10 For example, zinc (Zn) or aluminum (Al) suitable on the surface of the Base body 2 sprayed or flame sprayed. As materials in principle, all materials are suitable for the solder stop layer 10 which are sufficient Have adhesiveness to the base body 2 and up to at least about 350 ° C are temperature resistant. Thermal or by are particularly advantageous UV radiation curable materials, for example a thermally curable Adhesive from Grace, type Amicon D 125 F4, or a by UV radiation curable silicone from Loctite, type 5091.
  • the layer thickness d of the first solder stop layer 10 is at least 10 ⁇ m when using a spray. When using an adhesive, it is advisable to apply a thicker layer thickness d to provide, in particular at least 0.3 mm.
  • A can also be used as the temperature-stable material for the first solder stop layer 10 temperature stable varnish or a temperature stable resin can be used.
  • the first solder stop layer 10 can also be oxidized Base body 2 are produced.
  • the one lying opposite the soldering job 8 Flat side of the base body 2 on part of the width E of the constriction area 4 a second solder stop layer 10a is applied.
  • the second solder stop layer 10a is preferably located there in the same area of the constriction point 4 like the first solder stop layer 10 and also only extends to the narrowest Location 12.
  • the second solder stop layer 10a is approximately the same thickness as the first solder stop layer 10. This second solder stop layer 10a prevents the Drain solder on the underside of the base body 2 via the constriction area 4 can.
  • a third solder stop layer 10b is arranged on the side. This third solder stop layer 10b prevents the soldering order 8 from running onto that facing away from the constriction region 4 Surface on the solder side of the base body 2. Also the third solder stop layer 10b has approximately the same thickness as the first solder stop layer 10a.
  • FIG. 3 An alternative embodiment is also shown in broken lines in FIG. 3, in which the first solder stop layer 10 and the second solder stop layer 10b are connected, so that they extend over the solder order 8. Likewise indicated by dashed lines that the extent of the solder stop layer 10 is not on the Constriction area 4 must be limited. You can also refer to the lot page the narrowing area 4 in the adjoining and from Extend the soldering order 8 area of the base body 2.
  • the top view according to FIG Dimensions the width D of the base body 2 in the narrowest area Point 12 illustrates.
  • the figure clearly shows that the Constriction area 4 and the recess 6 overlap, the recess 6 extends to the narrowest point 12 of the constriction area 4.
  • a fuse element is shown in the exemplary embodiment according to FIGS. 5a and 5b, whose narrowing area 4 has a plurality of narrowest points 12, in Embodiment 6 includes. These narrowest points 12 are due to remaining Bridges between a plurality of in series transverse to the longitudinal direction of the base body 2 spaced apart, circular disk-shaped in the embodiment Recesses 14 formed.
  • One down to the narrowing area 4 extending groove-shaped recess, highlighted by cross hatching 6 extends analogously to the exemplary embodiments according to FIGS. 4 to the middle of the constriction area 4, d. H. to the narrowest points 12.
  • first solder stop layer 10 and a first second solder stop layer 10a is provided on the narrow sides of the base body 2 as well as at the edge of the recesses 4. Expansion arches 16 serve to compensate for length tolerances to accommodate the Basic body 2 provided securing sleeve.
  • Figure 6 comprises an electrical fuse link, in the illustrated embodiment an NH fuse link, a housing 20 in which the base body 2 of the fuse element between two on the end faces of the housing 20 located contact blades 26 is arranged.
  • the housing 20 comprises a sleeve-shaped housing jacket 28 which consists of a Insulation material, for example a ceramic.
  • the housing jacket 28 is screwed to an end plate 30 or a base plate 31 on its end faces. Between the end plate 30 or the base plate 31 and the housing jacket 28 seals 32 are also arranged, which cover the interior seal the housing 20 tightly against the outside space and prevent it, that an extinguishing sand 33 located inside can escape to the outside.
  • the end plate 30 and the base plate 31 are each with a over the housing shell 28 protruding tab 34 provided.
  • One in the base plate 31 arranged cap 36 closes the interior of the housing 20 after it has been Extinguishing sand 33 has been filled.
  • a fuse element 40 for example a wire, which is electrically parallel to the Base body 2 is switched.
  • the display fuse element 40 is in the range of Base plate 31 on an intermediate plate 42, for example by spot welding, fixed and to the contact knife arranged on the base plate 31 26 connected.
  • In the end plate 30 there is an insulating bushing in an opening 44 46 used, through which the display fuse element 40 is passed.
  • the opening 44 opens into a recess 48 in the end plate 30.
  • a display device 50 is inserted into this recess 48 with a base leg 52 and fixed there by squeezing the lateral edge of the recess 48.
  • the display device 50 comprises an L-shaped curved display element 53 which a first leg 54 and a second almost perpendicular thereto Tavern 56 includes.
  • the first leg 54 is pivotable about one to the plane of the drawing vertical and parallel to the end plate 30 pivot axis.
  • the preferred exemplary embodiment according to the figure is the display device 50 in one piece and consists of a spring plate.
  • Base leg 52 and first Legs 54 form a leg spring which is fixed by the one on the first leg 54
  • Display fuse element 40 is fixed in the prestressed position such that the base leg 52 and first leg 54 run approximately parallel to one another, d. H. the leg spring is closed.
  • the base body 2 is now arranged in the housing 20 of the electrical fuse, that the solder order 8 from the face plate 30 or the sand filling side (Base plate 31) viewed from always on the same side of the constriction area 4 is located. In the exemplary embodiment, this is that from the front 30 opposite side of the constriction area 4. This is - same installation position (Indicator above) provided in the fuse box - a high level reproducibility in the tripping behavior of the NH fuse link guaranteed.

Landscapes

  • Fuses (AREA)
EP98122731A 1998-02-04 1998-11-28 Conducteur fusible pour cartouche à fusible Withdrawn EP0935273A3 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19804331 1998-02-04
DE19804331 1998-02-04
DE19846349 1998-10-08
DE19846349A DE19846349A1 (de) 1998-02-04 1998-10-08 Schmelzleiter für einen elektrischen Sicherungseinsatz
US09/233,307 US6075434A (en) 1998-02-04 1999-01-19 Fusible element for an electrical fuse

Publications (2)

Publication Number Publication Date
EP0935273A2 true EP0935273A2 (fr) 1999-08-11
EP0935273A3 EP0935273A3 (fr) 2000-03-22

Family

ID=27218117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98122731A Withdrawn EP0935273A3 (fr) 1998-02-04 1998-11-28 Conducteur fusible pour cartouche à fusible

Country Status (2)

Country Link
US (1) US6075434A (fr)
EP (1) EP0935273A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT513715A1 (de) * 2012-12-04 2014-06-15 Altenhuber Friedrich Ing Schmelzleiter und Schmelzsicherung

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1134769A1 (fr) 2000-03-08 2001-09-19 Cooper Bussmann UK Limited Procédé pour appliquer une couche de matériau à effet M
DE10022241A1 (de) * 2000-05-08 2001-11-15 Abb Research Ltd Schmelzleiter und Verfahren zu seiner Herstellung sowie Sicherungsleiter und Sicherung
EP1189252A1 (fr) * 2000-09-13 2002-03-20 Siemens Aktiengesellschaft Elément fusible, son procédé de fabrication et matériau de soudure
CZ300923B6 (cs) * 2002-03-25 2009-09-09 Oez S.R.O. Kontakt nožové pojistky a zpusob jeho výroby
CZ300786B6 (cs) * 2002-03-28 2009-08-12 Oez S.R.O. Tavný vodic, zejména pro vložky tavných elektrických pojistek
CZ300689B6 (cs) * 2002-04-05 2009-07-15 Oez S.R.O. Tavný vodic, zejména pro tavné elektrické pojistky
US6956459B2 (en) * 2003-10-23 2005-10-18 Siemens Westinghouse Power Corporation Sensing apparatus for blown fuse of rectifying wheel and associated methods
US7023307B2 (en) * 2003-11-06 2006-04-04 Pratt & Whitney Canada Corp. Electro-magnetically enhanced current interrupter
JP4896630B2 (ja) * 2006-08-28 2012-03-14 矢崎総業株式会社 ヒューズエレメント及びヒューズエレメントの製造方法
KR101112513B1 (ko) * 2007-03-13 2012-03-13 고쿠리츠다이가쿠호진 사이타마 다이가쿠 휴즈 링크 및 휴즈
DE102007014334A1 (de) * 2007-03-26 2008-10-02 Robert Bosch Gmbh Schmelzlegierungselement, Thermosicherung mit einem Schmelzlegierungselement sowie Verfahren zum Herstellen einer Thermosicherung
US20090189730A1 (en) * 2008-01-30 2009-07-30 Littelfuse, Inc. Low temperature fuse
JP5765530B2 (ja) * 2011-04-22 2015-08-19 双信電機株式会社 電力用ヒューズ
US20150102896A1 (en) * 2013-10-11 2015-04-16 Littelfuse, Inc. Barrier layer for electrical fuses utilizing the metcalf effect
JP6719983B2 (ja) * 2015-06-04 2020-07-08 デクセリアルズ株式会社 ヒューズエレメント、ヒューズ素子、保護素子、短絡素子、切替素子
CN112309801B (zh) * 2017-10-30 2023-02-03 Aem科技(苏州)股份有限公司 一种微型超级表面贴装熔断器及其制造方法
JP7231527B2 (ja) * 2018-12-28 2023-03-01 ショット日本株式会社 保護素子用ヒューズ素子およびそれを利用した保護素子
US20230154715A1 (en) * 2021-11-12 2023-05-18 Eaton Intelligent Power Limited Dual-element fuse with chemical trigger element and methods of manufacture
US11605519B1 (en) * 2021-11-12 2023-03-14 Chi Lick Schurter Limited High breaking capacity strip fuse and the manufacture method of thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668586C (de) * 1938-12-06 Wickmann Werke Akt Ges Schmelzleiter fuer ueberstromtraege Schmelzsicherungspatronen
US3092715A (en) * 1960-05-06 1963-06-04 Chase Shawmut Co Method for manufacturing fuse links
US3148257A (en) * 1959-11-27 1964-09-08 English Electric Co Ltd Electric fuses
DE2551627A1 (de) * 1975-11-18 1977-06-02 Borchart Hans F Dipl Ing Schmelzleiter fuer traege elektrische schmelzsicherungen
DE3239903A1 (de) * 1981-11-09 1983-05-26 Kombinat Veb Keramische Werke Hermsdorf, Ddr 6530 Hermsdorf Einstueckiger schmelzleiter fuer elektrische sicherungen
GB2120027A (en) * 1982-05-07 1983-11-23 Dorman Smith Fuses Fusible element
US4503415A (en) * 1983-06-06 1985-03-05 Commercial Enclosed Fuse Co. Of Nj Encapsulated hot spot fuse link
DE29707774U1 (de) * 1997-04-30 1997-08-21 Fritsche, Matthias, Dipl.-Ing., 98693 Ilmenau Schmelzleiter für elektrische Sicherungen

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US3123694A (en) * 1964-03-03 High current-carrying-capicity cartridge
US2703352A (en) * 1953-08-13 1955-03-01 Chase Shawmut Co Fuse and fuse link of the time lag type
US3113195A (en) * 1962-02-05 1963-12-03 Chase Shawmut Co Fuse structures for elevated circuit voltages
DE19506547C2 (de) * 1994-08-01 1997-01-30 Siemens Ag Ganzbereichs-Stromrichtersicherung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668586C (de) * 1938-12-06 Wickmann Werke Akt Ges Schmelzleiter fuer ueberstromtraege Schmelzsicherungspatronen
US3148257A (en) * 1959-11-27 1964-09-08 English Electric Co Ltd Electric fuses
US3092715A (en) * 1960-05-06 1963-06-04 Chase Shawmut Co Method for manufacturing fuse links
DE2551627A1 (de) * 1975-11-18 1977-06-02 Borchart Hans F Dipl Ing Schmelzleiter fuer traege elektrische schmelzsicherungen
DE3239903A1 (de) * 1981-11-09 1983-05-26 Kombinat Veb Keramische Werke Hermsdorf, Ddr 6530 Hermsdorf Einstueckiger schmelzleiter fuer elektrische sicherungen
GB2120027A (en) * 1982-05-07 1983-11-23 Dorman Smith Fuses Fusible element
US4503415A (en) * 1983-06-06 1985-03-05 Commercial Enclosed Fuse Co. Of Nj Encapsulated hot spot fuse link
DE29707774U1 (de) * 1997-04-30 1997-08-21 Fritsche, Matthias, Dipl.-Ing., 98693 Ilmenau Schmelzleiter für elektrische Sicherungen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT513715A1 (de) * 2012-12-04 2014-06-15 Altenhuber Friedrich Ing Schmelzleiter und Schmelzsicherung
AT513715B1 (de) * 2012-12-04 2016-06-15 Altenhuber Friedrich Ing Schmelzleiter und Schmelzsicherung

Also Published As

Publication number Publication date
US6075434A (en) 2000-06-13
EP0935273A3 (fr) 2000-03-22

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