EP0088297B1 - Schmelzsicherung, insbesondere NH-Sicherung - Google Patents

Schmelzsicherung, insbesondere NH-Sicherung Download PDF

Info

Publication number
EP0088297B1
EP0088297B1 EP83101818A EP83101818A EP0088297B1 EP 0088297 B1 EP0088297 B1 EP 0088297B1 EP 83101818 A EP83101818 A EP 83101818A EP 83101818 A EP83101818 A EP 83101818A EP 0088297 B1 EP0088297 B1 EP 0088297B1
Authority
EP
European Patent Office
Prior art keywords
housing
fuse
contact member
contact
front plate
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
Application number
EP83101818A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0088297A2 (de
EP0088297A3 (en
Inventor
Erwin Geiger
Albert Seger
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT83101818T priority Critical patent/ATE35594T1/de
Publication of EP0088297A2 publication Critical patent/EP0088297A2/de
Publication of EP0088297A3 publication Critical patent/EP0088297A3/de
Application granted granted Critical
Publication of EP0088297B1 publication Critical patent/EP0088297B1/de
Expired 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
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H01H85/153—Knife-blade-end contacts

Definitions

  • the invention relates to an electrical fuse link, in particular NH fuse link according to the preamble of claim 1.
  • a fuse is known (DE-C-1638141), which consists of a tubular housing made of insulating material with mounted cover plates. A prefabricated unit consisting of two contact blades and this fusible link is inserted and locked in the tubular housing. A button-shaped collar attached to the base of a contact knife prevents the fuse element from being pulled out of the housing. The contact knife is displaced radially outwards a few millimeters so that a nose attached to it lies narrowly on the edge of the housing. On the opposite side of the contact knife, one of the cover plates of the housing engages in a recess in the contact knife. This prevents the contact knife from sliding back into the interior of the housing. However, it is necessary to mount the contact knife and the cover plate of the housing in one step.
  • the shoulders extend in the fusible conductor level.
  • the object of the invention is to develop an electrical fuse link, in particular an NH fuse link, in which the locking of the contact blades on the housing is improved and at the same time the assembly of the contact blades is simplified.
  • a first end plate on the base of a first contact knife has formations which interlock positively with corresponding counter-formations of the housing.
  • a second end plate on the base of a second contact knife, which lies opposite the first contact knife, is provided with formations in such a way that it already rests on supports on the housing in a centered position. This enables the structure to be further simplified.
  • the second end plate at the base of the second contact knife can be made so wide that it rests on an annular support surface on the housing. It is possible to use housings without ribs, which simplifies the manufacture of the housing and allows the assembly of contact blades and fusible link to be introduced more quickly and easily.
  • the sliding back of a contact knife into the housing can be prevented by inserting at least one pin into recesses in the end faces of the housing, on which the second end plate already lies in a centered position on the base of the second contact knife on the housing.
  • Pins are already known for locking contact blades (DE-B-1 001 386). Bores in the contact blades receive the pins there, which can only prevent the contact blades from being pulled out of the housing. They do not protect against being pushed in.
  • the pins in the fuse link according to the invention prevent, according to one embodiment, that the contact blades can be pushed back into the housing.
  • This pin advantageously has a small profile compared to the contact knife in order to reduce the heat dissipation by welding spots when welding the fuse element. It does not serve to lock the contact knife, as is the case with the known fuse (DE-B-1 638141) described above by the button-shaped collar.
  • Contact knife, end plate and pin can be formed in one piece, whereby the contact resistance of the fuse is reduced.
  • the end plate can have recesses which increase its surface area.
  • the end plates of the fuse do not need to be live and can therefore be made of molded material. There are then no live grip tabs so that an operator is protected.
  • the fuse link according to the invention can be produced in a simple manner essentially from a finished fuse housing made of ceramic, from end plates and from a prefabricated unit contact knife fuse element.
  • the unit consisting of contact blades, end plates and fusible conductor, is supported by contact surfaces on the edges of the end faces of the fuse housing and locked by the end plates to be screwed on.
  • the contact blade is mounted with the end plate on the end face of the housing in the fuse link according to the invention. This simplifies production and results in a flat and more secure circulation.
  • FIG. 1 an embodiment of the fuse link according to the invention is shown in an exploded view.
  • a second end plate is so large that it is in a centered position on an annular.
  • Contact surface of the housing rests.
  • FIG. 2 A further embodiment of the fuse link according to the invention is illustrated in FIG. 2.
  • a sliding of an end plate with the contact knife into the housing is prevented except by its contact surfaces by pins which are located in recesses in the end faces of the housing between the end plate and the housing.
  • the tubular housing 1 according to FIG. 1 is made of insulating material and encloses an axially inserted fusible conductor 2, which has a contact knife 31 or 32 at its ends.
  • the contact blades 31, 32 which are located outside the housing 1, have end plates 16 and 14 on their base. After the contact knife has been radially displaced, the end plate 16 rests on the edge of the housing 1.
  • An annular support surface 5 on the edge of the through openings in the end face 6 of the housing 1 forms a support for the molding 73 of the second contact knife 32.
  • the face plate 16 of the first contact knife has formations 71. These are essentially oval with groove-shaped recesses 20. They interlock positively with a counter-molding 81 of the housing 1, which is a further-developed oval with a rib 21.
  • the lower, first end plate 16 can be guided past the rib 21 when it is installed in the housing 1. After the contact knife 31 has been displaced, the end plate 1'6 finds a second flat support on the rib 21 and the counter-molding.
  • End plates 9 and 10 which are screwed onto the end faces 6 of the housing 1, press the end plates 14 and 16 against the bearing surfaces 5 at the edge of the housing 1, lock the contact blades 31 and 32.
  • the end plates 9 and 10 have openings for the contact blades and one Auxiliary fuse wire 11. So they do not need to be live and can therefore consist of molded material.
  • the end plates 9 can also be formed in the usual way as seals made of asbestos or asbestos-like material.
  • Pins 13 are formed between the end plates 14 and 16 and the fuse element 2, respectively. These advantageously have a smaller profile than the contact blades, as a result of which one or more fusible conductors 2 can be easily welded to the pin 13. Contact knives 31 and 32, end plate 4 and pin 13 can be made from one piece by mechanical deformation.
  • the second end plate 14 has an essentially oval shape 73 without a groove-shaped recess 20. It is so large that it rests only in a centered position on the annular support surface 5.
  • the unit of contact blades 31, 32 end plates 16, 14 and fuse element 2 is in the Ge. installed at home from above.
  • the fuse element 2 is overstretched and then the first end plate 16 is displaced radially so that it rests on the rib 21.
  • the second end plate 17 according to FIG. 2 has an essentially oval shape 74 and lies on pins 18 in addition to the annular contact surface 5. These are only inserted after the installation of the unit comprising contact blades 31, 32, end plates 17, 22 and fusible conductor 2 in recesses in the end face 6 of the housing 1, so that they bridge the housing opening.
  • the first end plate 22 has an essentially oval shape 72. It engages with an oval counter-shape 82 of the housing 1 and, in the radially displaced position, lies flat on supports at the edge of the housing.

Landscapes

  • Fuses (AREA)
  • Road Signs Or Road Markings (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
EP83101818A 1982-03-10 1983-02-24 Schmelzsicherung, insbesondere NH-Sicherung Expired EP0088297B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83101818T ATE35594T1 (de) 1982-03-10 1983-02-24 Schmelzsicherung, insbesondere nh-sicherung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3208667 1982-03-10
DE19823208667 DE3208667A1 (de) 1982-03-10 1982-03-10 Schmelzsicherung, insbesondere nh-sicherung

Publications (3)

Publication Number Publication Date
EP0088297A2 EP0088297A2 (de) 1983-09-14
EP0088297A3 EP0088297A3 (en) 1985-07-10
EP0088297B1 true EP0088297B1 (de) 1988-07-06

Family

ID=6157850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101818A Expired EP0088297B1 (de) 1982-03-10 1983-02-24 Schmelzsicherung, insbesondere NH-Sicherung

Country Status (12)

Country Link
EP (1) EP0088297B1 (da)
AR (1) AR229197A1 (da)
AT (1) ATE35594T1 (da)
BR (1) BR8301189A (da)
CS (1) CS257763B2 (da)
DE (2) DE3208667A1 (da)
DK (1) DK161923C (da)
ES (2) ES278106Y (da)
GR (1) GR78507B (da)
IN (1) IN158606B (da)
NO (1) NO161026C (da)
PT (1) PT76358B (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630584B1 (fr) * 1988-04-20 1995-07-13 Legrand Sa Cartouche a couteaux a barrette fusible soudee a l'exterieur de la chambre de fusion
DE3930381C2 (de) * 1989-09-12 1994-03-24 Mueller Jean Gmbh NH-Sicherungseinsatz

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790713A (en) * 1931-02-03 op pittsburgh
US1788877A (en) * 1928-03-23 1931-01-13 Great Western Fuse Company Renewable fuse
US2077823A (en) * 1932-09-21 1937-04-20 James M Magee Refillable blade fuse
DE684361C (de) * 1937-04-29 1939-11-27 Aeg Geschlossene Sicherungspatrone
DE721967C (de) * 1940-09-10 1942-06-25 Elektrotechnische Spezialfabri Niederspannungshochleistungssicherung mit Kontaktsteckorganen
AT266965B (de) * 1967-02-16 1968-12-10 Schneider Schaltgeraete Schmelzsicherung
FR1600751A (da) * 1968-12-17 1970-07-27
DE7414273U (de) * 1974-04-24 1974-07-25 Mueller J Ohg NH-Sicherungseinsatz mit spannungsfreien Grifflaschen

Also Published As

Publication number Publication date
DK113983A (da) 1983-09-11
PT76358B (de) 1986-08-28
NO161026C (no) 1989-06-21
IN158606B (da) 1986-12-20
ES281122Y (es) 1988-06-16
CS257763B2 (en) 1988-06-15
DK161923C (da) 1992-02-10
GR78507B (da) 1984-09-27
DE3208667A1 (de) 1983-09-22
EP0088297A2 (de) 1983-09-14
DK113983D0 (da) 1983-03-09
PT76358A (de) 1983-04-01
AR229197A1 (es) 1983-06-30
CS160483A2 (en) 1987-09-17
EP0088297A3 (en) 1985-07-10
DK161923B (da) 1991-08-26
ES278106U (es) 1985-02-16
ES281122U (es) 1985-02-16
ATE35594T1 (de) 1988-07-15
BR8301189A (pt) 1983-11-22
ES278106Y (es) 1986-05-16
NO830132L (no) 1983-09-12
DE3377310D1 (en) 1988-08-11
NO161026B (no) 1989-03-13

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