EP0328468A1 - Einrichtung zum Anzeigen des Ansprechens von Schmelzpatronen für elektrischen Schutz - Google Patents

Einrichtung zum Anzeigen des Ansprechens von Schmelzpatronen für elektrischen Schutz Download PDF

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Publication number
EP0328468A1
EP0328468A1 EP89420038A EP89420038A EP0328468A1 EP 0328468 A1 EP0328468 A1 EP 0328468A1 EP 89420038 A EP89420038 A EP 89420038A EP 89420038 A EP89420038 A EP 89420038A EP 0328468 A1 EP0328468 A1 EP 0328468A1
Authority
EP
European Patent Office
Prior art keywords
wire
pusher
washer
cartridge
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
EP89420038A
Other languages
English (en)
French (fr)
Other versions
EP0328468B1 (de
Inventor
Christian Bonhomme
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 SA
Original Assignee
Ferraz SA
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 Ferraz SA filed Critical Ferraz SA
Priority to AT89420038T priority Critical patent/ATE85158T1/de
Publication of EP0328468A1 publication Critical patent/EP0328468A1/de
Application granted granted Critical
Publication of EP0328468B1 publication Critical patent/EP0328468B1/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
    • 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
    • H01H85/30—Means for indicating condition of fuse structurally associated with the fuse
    • 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
    • H01H85/30—Means for indicating condition of fuse structurally associated with the fuse
    • H01H85/303—Movable indicating elements

Definitions

  • the present invention relates to indicator devices mounted on the fusible electrical protection cartridges in order to signal the operation thereof, and it relates more particularly to devices of this type called “striker” or "indicator”.
  • devices of the latter type generally comprise a sliding pusher or “striker” associated with elastic means which tend to drive it axially out of its guide, said pusher being retained in the internal position or “retracted” by a fusible wire reduced section which is mounted in parallel with the main wire or wires or fusible elements of the cartridge in order to melt and release the pusher as soon as these main fusible wires have melted.
  • the free end of the signaling pushbutton thus released appears on the outside of the cartridge and indicates to the user that it has worked.
  • the release of the pusher can be used to actuate the movable member of a microswitch which switches on a signaling or remote control.
  • the present invention particularly intends to remedy, which consists mainly in providing, at the level of the base of the pusher which cooperates with the reduced-section portion of the retaining fuse, an intermediate part which is in contact with said fuse on either side of the aforementioned portion and which is arranged so as to behave on the one hand in a non-conductive manner with respect to the low voltage current which flows through said fuse and therefore not to shunt the reduced section of the latter when the cartridge is traversed by the nominal current, thus allowing with certainty the melting of the reduced section portion as soon as the main fuses have blown, on the other hand conductively very quickly after this melting of the reduced section, by ensuring in this way, like a shunt, the transmission of current between the two parts of the holding fuse arranged on either side of the reduced section portion once s exceeded a certain threshold and thus acting in the manner of a spark gap, and this until practically complete fusion.
  • the single figure of this drawing is an axial section illustrating the arrangement of an operating indicator device established in accordance with the invention.
  • the reference 1 designates the insulating casing (generally of ceramic nature) of a conventional type fuse cartridge of which we see in 2 one of the main fuse elements for current transmission, these elements 2 being arranged at the inside a coating mass 3 of agglomerated silica.
  • This envelope 1 which can be assumed to have a circular section, contains a radial chimney 4 made of an insulating material, inside of which is slidably mounted a striker formed by a cylindrical pusher 5.
  • the latter has a projection ring 5a against which a spring 6 which tends to drive said pusher out of the chimney 4 (5 '), said displacement being limited by abutment against said projection 5 has an inner flange 4a provided at the end of said fireplace.
  • the base 5 b of smaller diameter, of the pusher 5 is provided with a hooking device 5 c to allow the passage of a secondary fusible wire 7 which is embedded inside the coating mass 3 and which is intended to retain the pusher 4 in the "retracted" position shown. It should be observed that at the attachment device 5 c , this secondary wire 7 has a central portion 7 a having a reduced section.
  • an intermediate piece or washer 8 which forms a stop for the lower end of the spring 6.
  • the base 5 b and the hooking device 5 c of the pusher 5 are engaged in the axial opening has a collar 8 fixed to the washer 8, the underside thereof being diametrically grooved 8b to determine a passage or guide for the secondary wire 7.
  • This washer 8 must be of a non-conductive nature for low voltage currents, and on the contrary become conductive after melting of the reduced-section part 7 a when the voltage across the latter exceeds a certain threshold.
  • the washer 8 can be made of aluminum or an aluminum-based alloy, the inner wall of the collar 8 a and the whole of the lower face including the groove 8 b being subjected to an operation of clean anodizing to cover them with a thin layer of 8 c alumina which ensures their electrical insulation.

Landscapes

  • Fuses (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Breakers (AREA)
EP89420038A 1988-02-09 1989-02-07 Einrichtung zum Anzeigen des Ansprechens von Schmelzpatronen für elektrischen Schutz Expired - Lifetime EP0328468B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89420038T ATE85158T1 (de) 1988-02-09 1989-02-07 Einrichtung zum anzeigen des ansprechens von schmelzpatronen fuer elektrischen schutz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8801725 1988-02-09
FR8801725A FR2627009B1 (fr) 1988-02-09 1988-02-09 Dispositif indicateur de fonctionnement pour cartouches fusibles de protection electrique

Publications (2)

Publication Number Publication Date
EP0328468A1 true EP0328468A1 (de) 1989-08-16
EP0328468B1 EP0328468B1 (de) 1993-01-27

Family

ID=9363243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420038A Expired - Lifetime EP0328468B1 (de) 1988-02-09 1989-02-07 Einrichtung zum Anzeigen des Ansprechens von Schmelzpatronen für elektrischen Schutz

Country Status (11)

Country Link
US (1) US4912449A (de)
EP (1) EP0328468B1 (de)
JP (1) JP2637542B2 (de)
KR (1) KR970010448B1 (de)
AT (1) ATE85158T1 (de)
AU (1) AU615511B2 (de)
CA (1) CA1292029C (de)
DE (1) DE68904571T2 (de)
DK (1) DK174390B1 (de)
ES (1) ES2037455T3 (de)
FR (1) FR2627009B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103367071A (zh) * 2012-03-27 2013-10-23 吉林市能兴电力设备有限公司 一种跌落式熔断器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418515A (en) * 1993-12-22 1995-05-23 Reyes; Daniel Fuse interruption indicator and integral extractor
US7710236B2 (en) * 2006-08-01 2010-05-04 Delphi Technologies, Inc. Fuse systems with serviceable connections

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1465397A (fr) * 1965-06-04 1967-01-13 Comp Generale Electricite Dispositif indicateur de fusion
FR1549230A (de) * 1967-06-28 1968-12-13
US3483502A (en) * 1967-12-21 1969-12-09 Mc Graw Edison Co Current limiting fuse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH219782A (de) * 1940-04-10 1942-02-28 Licentia Gmbh Schmelzsicherung mit Anzeige- und Auslöseeinrichtung.
DE1538458A1 (de) * 1966-08-18 1969-09-25 Elektropa Elektrotechn Spez Fa Schmelzsicherung
FR1560404A (de) * 1966-12-26 1969-03-21
US4387365A (en) * 1981-05-15 1983-06-07 Advanced Technology Laboratories, Inc. Real time digital scan converter
US4387358A (en) * 1982-05-20 1983-06-07 Gould Inc., Electric Fuse Div. Side mounted blown fuse indicator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1465397A (fr) * 1965-06-04 1967-01-13 Comp Generale Electricite Dispositif indicateur de fusion
FR1549230A (de) * 1967-06-28 1968-12-13
US3483502A (en) * 1967-12-21 1969-12-09 Mc Graw Edison Co Current limiting fuse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103367071A (zh) * 2012-03-27 2013-10-23 吉林市能兴电力设备有限公司 一种跌落式熔断器
CN103367071B (zh) * 2012-03-27 2015-12-16 吉林市能兴电力设备有限公司 一种跌落式熔断器

Also Published As

Publication number Publication date
JP2637542B2 (ja) 1997-08-06
DE68904571T2 (de) 1993-05-19
AU2899389A (en) 1989-08-10
DK56689A (da) 1989-08-10
FR2627009A1 (fr) 1989-08-11
KR970010448B1 (ko) 1997-06-26
ES2037455T3 (es) 1993-06-16
JPH01246741A (ja) 1989-10-02
DE68904571D1 (de) 1993-03-11
EP0328468B1 (de) 1993-01-27
DK174390B1 (da) 2003-01-27
FR2627009B1 (fr) 1990-06-15
DK56689D0 (da) 1989-02-08
US4912449A (en) 1990-03-27
KR890013687A (ko) 1989-09-25
ATE85158T1 (de) 1993-02-15
CA1292029C (en) 1991-11-12
AU615511B2 (en) 1991-10-03

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