EP1889276A1 - Coupe-circuit a haute tension - Google Patents

Coupe-circuit a haute tension

Info

Publication number
EP1889276A1
EP1889276A1 EP06754166A EP06754166A EP1889276A1 EP 1889276 A1 EP1889276 A1 EP 1889276A1 EP 06754166 A EP06754166 A EP 06754166A EP 06754166 A EP06754166 A EP 06754166A EP 1889276 A1 EP1889276 A1 EP 1889276A1
Authority
EP
European Patent Office
Prior art keywords
cap
insulating body
auxiliary
auxiliary cap
voltage fuse
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
EP06754166A
Other languages
German (de)
English (en)
Other versions
EP1889276B1 (fr
Inventor
Heinz-Ulrich Haas
Dirk Wilhelm
Werner-Günter SCHMEHL
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.)
Siba Fuses GmbH
Original Assignee
Siba Fuses 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
Application filed by Siba Fuses GmbH filed Critical Siba Fuses GmbH
Publication of EP1889276A1 publication Critical patent/EP1889276A1/fr
Application granted granted Critical
Publication of EP1889276B1 publication Critical patent/EP1889276B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H85/0013—Means for preventing damage, e.g. by ambient influences to the fuse
    • H01H85/0021—Means for preventing damage, e.g. by ambient influences to the fuse water or dustproof devices
    • H01H85/003—Means for preventing damage, e.g. by ambient influences to the fuse water or dustproof devices casings for the fusible element
    • 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
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/042—General constructions or structure of high voltage fuses, i.e. above 1000 V

Definitions

  • the invention relates to a high-voltage fuse, in particular for use at high temperatures under oil, according to the preamble of claim 1.
  • a generic high-voltage fuse is already known from US Pat. No. 5,892,427.
  • This high-voltage fuse has at each end an auxiliary cap and an upper cap.
  • the known fuse on an insulating body with an end-side circumferential annular groove.
  • the auxiliary cap and the top cap are each crimped in the annular groove.
  • the disadvantage is that the known high-voltage fuse does not provide sufficient tightness. However, such tightness is particularly necessary when such fuses are mounted under oil, so that an oil seal is given.
  • the known high voltage fuse is not suitable for use at high temperatures under oil.
  • Oil density high voltage fuses are typically mounted under the oil where the maximum temperature exceeds part 60 0 C and temperatures are reached to 150 0 C, generally at least 100 0 C. safety checks, for example according to IEC 60282-1, however, be at a maximum of 85 0 C performed. However, it is essential that the aforementioned fuses are oil-tight at high temperatures up to 150 0 C.
  • the use of high-voltage fuses under high temperatures leads to the following problems. It is so that the material expansion of the caps increases with increasing operating temperature. Particularly affected is the press fit between the top cap and the auxiliary cap or between the auxiliary cap and the ceramic insulator.
  • Object of the present invention is to provide a high-voltage fuse of the type mentioned, which is simple and inexpensive to produce and even at high temperatures ensures sufficient oil tightness.
  • the above object is achieved in a high-voltage fuse of the type described above by the features of claim 1.
  • the interlocking connection between the auxiliary cap and the insulating body ensures that even at high temperatures it is not possible for the auxiliary cap and thus the cap placed on the auxiliary cap to come into contact with the insulating body and the penetration of oil into the interior of the insulating body ,
  • the positive connection ensures even at temperatures of more than 100 0 C, preferably 150 0 C, for a sufficient strength of the caps on the ceramic tube, in principle, higher temperatures are possible.
  • the high-voltage fuse according to the invention is very simple and inexpensive to produce, with a sufficient oil tightness is ensured even at high temperatures.
  • the cost-effective production results from the fact that only one recess is required in the insulating end, which not only serves to produce the positive connection between the top cap and the auxiliary cap, but also absorbs the sealant.
  • the auxiliary cap and / or the top cap acts on the sealant to produce a high sealing effect. This results in a combinatorial effect of positive locking between the upper cap or auxiliary cap and the insulating body on the one hand and the pressurization of the sealing agent through the upper cap or the auxiliary cap on the other hand, in the same recess of the insulating body.
  • the curling of the respective caps in the recess can be combined simultaneously with the pressurization of the seal.
  • the upper cap is deformed against the auxiliary cap and / or the insulating body in such a way that a form-locking connection is formed. tion between the top cap and the auxiliary cap and / or between the top cap and the insulating results.
  • the invention is thus based on the basic idea that the top cap and the auxiliary cap are positively connected with each other and / or with the insulating body to allow sufficient oil resistance of the high-voltage fuse according to the invention even at elevated temperatures.
  • the recess is formed as a circumferential annular groove in the insulating body, which is simple and inexpensive to produce.
  • the top cap and the auxiliary cap in the region of the same depression deformed or pressed in the direction of the recess, wherein, preferably, the lateral surface of the top cap extends in the region of the recess over the lateral surface of the auxiliary cap out in the longitudinal direction of the insulating body and wherein the deformation region of the upper cap is provided at least also in a region of the depression which is not covered by the auxiliary cap.
  • This type of positive connection makes it possible that first the auxiliary cap is placed on the insulating body and deformed to form a positive connection, wherein, for example, the auxiliary cap can be partially pressed into the depression. Then then the top cap can be placed on the auxiliary cap, and indeed so far that the lateral surface of the top cap extends beyond the outer cap of the cap. In the region extending beyond the lateral surface of the auxiliary cap, the upper cap is then deformed, preferably pressed into the same depression, at least in regions, so that a form-fitting connection is formed between the upper cap and the insulating body.
  • the top cap and the auxiliary cap have superimposed deformation regions.
  • deformation regions of the top cap and the auxiliary cap are provided in at least two different recesses of the insulating body. For example, it is necessary to develop a sufficient strength - A -
  • a sealant which is provided between the top cap and the insulating body and / or between the auxiliary cap and the insulating body.
  • the sealing means is a sealing collar and / or a sealing ring.
  • the sealing means is fixed in the recess of the insulating body. In the operating state, the sealant is then below the deformation regions of the top cap and / or the auxiliary cap between the caps and the insulating body or optionally at least partially between the caps.
  • the arrangement of the sealant in the recess, the position of the sealant is set on the insulator.
  • the upper cap and / or the auxiliary cap it happens that the upper cap and / or the auxiliary cap are deformed against the sealant, which means that the deformation region of the upper cap and / or the auxiliary cap compresses the sealant.
  • the upper cap and / or the auxiliary cap has longitudinally adjacent deformation regions separated by an undeformed region. As a result, the upper cap and / or the auxiliary cap is deformed several times in separate areas, whereby the sealing agent is thrown between the deformation areas and a tightness of the connection is ensured.
  • the adjacent deformation regions of the top cap and / or the auxiliary cap should be at a certain distance from each other, which allows a raising of the sealant between the deformation regions.
  • the sealant has a sufficiently high elasticity, in order nevertheless to form in the case of the expansion of the caps at high temperatures. To seal the gap and to ensure a secure non-positive connection.
  • the top cap and the auxiliary cap are deformed such that preferably via a sealing means a positive connection between the top cap and the auxiliary cap and / or the insulating body and / or between the auxiliary cap and gives the insulating body.
  • the invention is based on the basic idea at this point, by pressing the auxiliary cap and / or the top cap on the insulating body, wherein between the auxiliary cap and / or the top cap and the insulating body at least one sealing means may be provided to form a positive connection.
  • the auxiliary cap can be crimped in the end region of the lateral surface and / or the top cap pressed into the recess in the frontal region of the lateral surface, preferably rolled into the annular groove. If only a single form-locking molding operation is provided, then it is possible that the auxiliary cap at the edge of the cap and the upper cap are simultaneously rolled in from the outside at the same time. In this case, overlying deformation areas can be obtained by co-deforming the auxiliary cap and the top cap.
  • the auxiliary cap on the cap edge and the top cap are also rolled on the cap edge simultaneously from the outside, so that after the molding process, the auxiliary cap and the top cap each have a deformation region, which are not arranged one above the other.
  • the lateral surface of the upper cap extends beyond the region of the depression.
  • the lateral surface of the upper cap is flared frontally outwards.
  • FIG. 1 shows a cross-sectional view of a first embodiment of a high-voltage fuse according to the invention
  • Fig. 2 is a cross-sectional view of a second embodiment of a high-voltage fuse according to the invention.
  • FIG. 3 to 7 detail views of possible form-fitting connections between the upper cap, auxiliary cap and insulator in alternative embodiments of inventive high voltage fuses in cross section.
  • a first embodiment of an inventive oil-tight high-voltage fuse 1 is shown, which is intended for operation at temperatures up to preferably 150 0 C.
  • an auxiliary cap 3 is placed on the front side and an upper cap 4 is placed on the auxiliary cap 3.
  • the lateral surface of the insulating body 2 is at least partially covered in the front region of the insulating body 2 of the auxiliary cap 3.
  • the lateral surface of the auxiliary cap 3 is completely covered by the lateral surface of the top cap 4 according to the embodiment of the high-voltage fuse 1 according to the invention shown in FIG.
  • a sealing means 5 located between the top cap 4 and the insulating body 2, a sealing means 5, wherein it is in the illustrated in FIGS. 1 to 5 embodiments of the high-voltage fuse 1 according to the invention is a sealing sleeve.
  • the auxiliary cap 3 via seemssla- see with terminal caps of a provided in the interior of the insulating body 2 fusible conductor can be contacted electrically.
  • the upper cap 4 in turn is electrically contacted with the auxiliary cap 3, wherein the electrical contact to the outside preferably takes place directly over the lateral surface of the upper cap 4.
  • the auxiliary cap 3 so lier emotions against the insulating 2 is deformed, that results in a positive connection with the insulating body 2.
  • the lateral surface of the auxiliary cap 3 is partially bent at the outer edge in the direction of the central longitudinal axis of the insulating body 2, wherein the formed during bending deformation region 7 of the auxiliary cap 3 engages in the inner region of a circumferential groove 8 of the insulating body 2 , It is such that the deformation region 7 abuts against a shoulder 9 of the insulating body 2, whereby a positive connection between the auxiliary cap 3 and the insulating body 2 is formed.
  • the sealing means 5 in turn is fixed in the groove 8 and abuts against the end face of the auxiliary cap 3 in the deformation region 7.
  • the upper cap 4 which is preferably frictionally fitted onto the auxiliary cap 3, with the auxiliary cap 3, it is further provided that two further deformation regions 10, 11 of the upper cap 4 are predetermined by rolling in or rolling in the upper cap 4 into the groove 8, by which it comes about the sealing means 5 for forming a positive connection with the auxiliary cap 3.
  • a non-positive connection is also generated. It is essential in the embodiment shown in FIG. 1 that the deformation region 7 of the auxiliary cap 3 and the further deformation regions 10, 11 of the upper cap 4 engage in the same groove 8 of the insulating body 2.
  • a further embodiment of a high-voltage fuse according to the invention is shown, wherein the upper cap 4 and the auxiliary cap. 3 have superimposed deformation regions 7, 10.
  • the auxiliary cap 3 at the edge of the cap and the top cap 4 can be centrally rolled from the outside at the same time.
  • the deformation regions 7, 10 are thus obtainable by jointly deforming the auxiliary cap 3 and the upper cap 4.
  • FIG. 3 shows a connection in an alternative embodiment of a high-voltage fuse 1 according to the invention, the upper cap 4 being deformed to a lesser extent in the further deformation region 10 than in the further deformation region 11.
  • the sealing means 5 below the deformation regions 7, 10 on the one hand and below the deformation region 11 on the other hand applied with a substantially equal contact pressure, resulting in a uniform loading of the sealant.
  • the upper cap 4 has only one further deformation region 10, which is arranged laterally adjacent to the deformation region 7 of the auxiliary cap 3 relative to the adjacent end side of the insulating body 2.
  • the deformation region 7 of the auxiliary cap 3 is deformed against the sealant 5 and leads to a compression of the sealant 5 in this area.
  • a frictional connection between the upper cap 4, the auxiliary cap 3 and the sealing means 5 or form a positive connection with the insulating body 2, it is provided that the upper cap 4 and the auxiliary cap 3 each on Jacket outer edge are bent in the direction of the insulating body 2.
  • the deformation region 7 of the auxiliary cap 3 and the further deformation region 10 of the upper cap 4 engage in the groove 8 of the insulating body 2, the insulating body 2 having different wall thicknesses on both sides of the groove 8.
  • the tightness between the auxiliary cap 3 and the upper cap 4 and the insulating body 2 is ensured by a sealant 5.
  • FIGS. 6 to 7 show detailed views of connections according to the invention between the upper cap 4, the auxiliary cap 3 and the insulating body 2, as may be provided in alternative embodiments of the high-voltage fuse 1 according to the invention.
  • two sealing means 5 are provided in each case, for example O-rings.
  • the second sealing means 5 is provided below the deformation region 7 of the auxiliary cap 3 between the insulating body 2 and the further deformation region 10 of the upper cap 4, wherein the second sealing compound 5 is compressed by the deformation region 10 of the upper cap 4. This ensures tightness even at higher temperatures.
  • the insulating body 2 on the side facing away from the adjacent end face of the insulating body 2 side of the groove 8 each have a wall thickness substantially equal to the total wall thickness, resulting from the wall thickness of the insulating body 2 in Front area of the insulating body 2 and the wall thickness of the auxiliary cap 3 results. This makes it possible to postpone the upper cap 4 substantially gap-free so far on the insulator that the groove 8 is completely covered.
  • the invention is a completely new way, wherein, preferably, the auxiliary cap 3 and the top cap 4 is pressed relative to a recess of the insulating body 2 to form a non-positive and positive connection or are rolled up and wherein the deformation region 7 of the auxiliary cap 3 with at least one further deformation region 10, 11 of the upper cap 4 and at least one sealing means 5 cooperates.
  • the auxiliary cap 3 and the top cap 4 in the same recess, preferably a circumferential annular groove 8 of the insulating body 2, are rolled.
  • the invention makes it possible to combine the features of high-voltage fuses 1 according to the invention described with reference to FIGS. 1 to 7, even if this is not described in detail.

Landscapes

  • Fuses (AREA)
  • Cable Accessories (AREA)
EP06754166A 2005-06-07 2006-06-07 Coupe-circuit a haute tension Active EP1889276B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005026330 2005-06-07
DE102005033212A DE102005033212B4 (de) 2005-06-07 2005-07-13 Hochspannungssicherung
PCT/EP2006/005398 WO2006131321A1 (fr) 2005-06-07 2006-06-07 Coupe-circuit a haute tension

Publications (2)

Publication Number Publication Date
EP1889276A1 true EP1889276A1 (fr) 2008-02-20
EP1889276B1 EP1889276B1 (fr) 2008-10-15

Family

ID=36888611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06754166A Active EP1889276B1 (fr) 2005-06-07 2006-06-07 Coupe-circuit a haute tension

Country Status (5)

Country Link
US (1) US20090021339A1 (fr)
EP (1) EP1889276B1 (fr)
AT (1) ATE411609T1 (fr)
DE (2) DE102005033212B4 (fr)
WO (1) WO2006131321A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102376506B (zh) * 2011-06-22 2013-12-11 麦朗辉 一种用于地埋式组合变压器的全绝缘熔断器
CN102290302A (zh) * 2011-07-04 2011-12-21 东莞市贝特电子科技有限公司 一种插头用保险丝及其制作方法
EP2565899A1 (fr) * 2011-08-30 2013-03-06 Siemens Aktiengesellschaft Boîtier résistant à la pression pour composant électrique
US10483071B2 (en) * 2018-01-05 2019-11-19 Littelfuse, Inc. Inner cap for high voltage fuse
CN207955011U (zh) * 2018-02-07 2018-10-12 兄弟工业株式会社 喷墨打印机
US11101093B2 (en) * 2019-01-21 2021-08-24 Littelfuse, Inc. Fuses and methods of forming fuses

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US1425692A (en) * 1922-08-15 Assiohobs to westinghouse electric
US1122427A (en) * 1914-03-06 1914-12-29 Fred W Schneider Inclosed cartridge-fuse.
US1290860A (en) * 1914-12-05 1919-01-07 Westinghouse Electric & Mfg Co Electric fuse.
US1262683A (en) * 1916-12-01 1918-04-16 Robert A Lewis Electric fuse.
US1422419A (en) * 1919-07-10 1922-07-11 Chase Shawmut Co Renewable fuse
US1788877A (en) * 1928-03-23 1931-01-13 Great Western Fuse Company Renewable fuse
FR745930A (fr) * 1931-12-02 1933-05-18 Gardy Sa Cartouche fusible pour haute tension et très faible intensité
DE663377C (de) * 1932-02-09 1938-08-04 Siemens Schuckertwerke Akt Ges Hochleistungssicherung fuer hohe Nennstromstaerken und hohe Spannungen
US2168153A (en) * 1938-03-23 1939-08-01 Gen Electric Renewable fuse
US2333354A (en) * 1940-03-06 1943-11-02 Electric Transmission Ltd Electric fuse of cartridge type
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Also Published As

Publication number Publication date
DE102005033212B4 (de) 2007-04-19
DE102005033212A1 (de) 2006-12-21
ATE411609T1 (de) 2008-10-15
WO2006131321A1 (fr) 2006-12-14
EP1889276B1 (fr) 2008-10-15
US20090021339A1 (en) 2009-01-22
DE502006001848D1 (de) 2008-11-27

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