EP0202317B1 - Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung - Google Patents

Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung Download PDF

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Publication number
EP0202317B1
EP0202317B1 EP86900088A EP86900088A EP0202317B1 EP 0202317 B1 EP0202317 B1 EP 0202317B1 EP 86900088 A EP86900088 A EP 86900088A EP 86900088 A EP86900088 A EP 86900088A EP 0202317 B1 EP0202317 B1 EP 0202317B1
Authority
EP
European Patent Office
Prior art keywords
electrically conductive
resistance
fuse
optoelectric
resistance layer
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
Application number
EP86900088A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0202317A1 (de
Inventor
Karl Walter Bonfig
Jörg-Walter HIMMEL
Ulrich Kuipers
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86900088T priority Critical patent/ATE58259T1/de
Publication of EP0202317A1 publication Critical patent/EP0202317A1/de
Application granted granted Critical
Publication of EP0202317B1 publication Critical patent/EP0202317B1/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
    • H01H85/04—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
    • H01H85/046—Fuses formed as printed circuits
    • 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
    • H01H85/32—Indicating lamp structurally associated with the protective device

Definitions

  • the invention relates to a fuse link of the type specified in the preamble of claim 1 and is based on DE-A-27 41 779.
  • a fuse link is known from DE-A-27 41 779, which can be designed both as a cartridge fuse and as a screw connector fuse. In both embodiments, it contains an optoelectric display device connected in parallel to the fuse element, which is separated from the fuse element by means of thermal insulation.
  • the optoelectric display device is arranged within a translucent casing, while in the case of the screw connector fuse it is arranged inside a connector housing made of glass or another, electrically non-conductive, transparent material. It consists of a light-emitting diode, which is connected in series to a resistor arrangement, which can optionally consist of one or two resistors connected to the light-emitting diode. In both cases, these are discrete resistors which, together with the light-emitting diode, form a rectilinear, cuboid arrangement.
  • a translucent housing is therefore required so that the optoelectric display device can be recognized by the viewer.
  • the optoelectric display device it is necessary for the optoelectric display device to be arranged within the translucent housing or the opaque casing.
  • an insulating layer of heat-resistant material to protect the optoelectric display device, i.e. the LED and the resistors required.
  • a further fuse element with an insulating body in which a fuse element embedded in the extinguishing agent is arranged between two contacts.
  • a glow lamp with a high-impedance series resistor connected in series is provided in a identification current path and is used to enable a clearly visible status display of the fuse link to replace mechanical identification devices on electrical fuse systems with a reliable, clearly visible, illuminated status display.
  • any optoelectric display device for example a filament lamp, a light-emitting diode or a liquid crystal display, which is designed in parallel with the fusible conductor via an identification current path, can be provided.
  • a reusable fuse cartridge in the form of a tube with an internal glow lamp in which the glow lamp is connected in series to a high-resistance resistor and several fusible conductors are arranged on the outside of the tube.
  • An additional special fuse holder is required for the fuse cartridge.
  • a fuse with an optoelectric display device which consists of a lamp arranged in a housing with a window, the connections of which are connected on the one hand directly to the one security cap and on the other hand via a resistor to the other security cap .
  • the resistance of the optoelectric display device consists of an electrically conductive material of high resistance, which is attached to the inner wall of the housing surrounding the lamp, the electrically conductive material consisting of a carbon-containing mixture with which the interior of the lamp housing is coated or painted.
  • the optoelectric display device is connected to the actual fuse by means of screw connections, so that an additional housing volume is required to accommodate the fuse with an optoelectric display device. This device can therefore not be easily replaced with simple fuses without a display device because of the larger volume required.
  • the known fusible link inserts with optoelectric status display have, because of the additional components required for the status display in the form of discrete series resistors, a much smaller internal volume that can be used for the extinguishing process of the switch-off arc when the fuse element burns through. As a result, the breaking capacity or breaking work to be fulfilled by the fuse is very severely restricted, so that the breaking capacity of the fuse link is considerably reduced.
  • screw caps with integrated light-emitting status indicators are used to indicate the status of a fuse, either a test contact for indicating the fuse status, which must be touched with a finger, or a long contact flag is required, which must be inserted between the fuse link and a fitting ring right into the fuse base . Both embodiments are complex in their construction and difficult to handle by the user.
  • the object of the invention is to create a fuse link with an optoelectric display device which is simple to manufacture, to manufacture and to handle have, requires little space, can be used in conventional fuse links and can be retrofitted for such fuse links and can be easily adapted to the performance characteristics of the fuse link used.
  • the solution according to the invention enables simple installation of the optoelectric display device by simplifying the contacting of the taps in the high-resistance layer with the contacts of the optoelectric display device and the fusible conductor.
  • the simplification of the contacting also enables a free choice of the geometric location of the voltage tap. As a result, good contacting of the voltage tap can be ensured even at high voltages and a correspondingly high resistance, since the resistance can be reduced at certain points.
  • the design of the resistor network as a film enables an arrangement, simple attachment and adaptation to different power, short-circuit and voltage data, so that retrofitting of conventional fuse links is also possible.
  • the film or the plastic insert so formed can be attached to the inner and / or outer surface of the insulating body of the fuse link so that the appropriate type of attachment can be selected as required.
  • FIG. 1 of a fuse link of a D-fuse system shows a hollow insulating body 1, preferably made of ceramic, on the inner surface 16 delimiting the cavity 15, an electrically conductive, high-resistance layer 2 is applied.
  • the electrically conductive, high-resistance layer 2 is guided to or over the front ends of the insulating body 1 in such a way that an electrically conductive connection is created when the contact caps 3, 4 of the fuse link are pressed on.
  • the electrically conductive, high-resistance layer 2 can be applied to one or more locations on the inner surface 16 of the insulating body 1 and has a different layer thickness and / or an inhomogeneous distribution of the specific resistance of the coating at different geometric locations of the coating, so that different resistance values are indicated different tapping points of the voltage and / or current divider network thus formed are present.
  • the electrically conductive, high-resistance layer 2 can, for example, be sprayed on as a graphite coating, vapor-deposited as a carbon or metal layer or, as in the exemplary embodiment according to FIGS. 3 and 4, as an insert body made of electrically conductive, high-resistance material, such as, for example, conductive plastic.
  • the light-emitting diode 5 serving as an optoelectric display device is arranged on one end of the fuse link so that it protrudes through an opening provided in a contact cap 4 and is clearly visible from the outside.
  • a first connection contact 6 of the light-emitting diode 5 is clamped under the one contact cap 4, while the other connection contact 9 of the light-emitting diode 5 is designed as a contact spring which presses on the electrically conductive, high-resistance layer 2 via the spatial separating device 7.
  • the electrically conductive, high-resistance layer 2 thus forms a voltage divider which is loaded by the light-emitting diode 5.
  • the voltage drop in a fuse link with melted fuse element 8 is determined via the local position of the other connection contact 9 of the light-emitting diode 5, which is designed as a contact spring, on the electrically conductive, high-resistance layer 2.
  • any desired voltage value can be defined and thus the electrical properties of the fuse link can be optimized.
  • the fusible conductor 8 can be obtained by multiple corrugations, kinks or the like. lengthened, thus optimizing the breaking capacity of the fuse link.
  • the insulating body 1 itself can alternatively be designed as an electrically conductive, high-resistance body, which is at least partially covered with an insulating layer, so that the remaining surfaces of the high-resistance insulating body 1 form the electrically conductive, high-resistance layer 2.
  • FIG. 2 shows a view of an NH fuse link with an optoelectric display device.
  • the electrically conductive, high-resistance layer 2 is applied to the outer surface 17 of the fuse link.
  • the fuse link has metallic fuse link contacts 14 protruding from its end faces.
  • a first light-emitting diode 5 serving as an optoelectric display device is connected between one of the fuse-link contacts 14 and a first auxiliary contact 11 on the electrically conductive, high-resistance layer 2.
  • a second light-emitting diode 10 can optionally or additionally be provided as an optoelectric display device on the outer surface 17 of the fuse link and connected to the electrically conductive, high-resistance layer 2 via a second and third auxiliary contact 12, 13.
  • the electrically conductive, high-resistance layer 2 can be covered by an additional insulating layer, not shown, so that the electrically conductive, high-resistance layer 2 is electrically, thermally and / or mechanically is protected.
  • the electrically conductive, high-resistance layer 2 being applied partly on the inner surface 16 and partly on the outer surface 17 of the insulating material body 1.
  • the optoelectric display device 5 can be introduced into the contact cap in the exemplary embodiment according to FIGS. 1 and 2, the electrical connection between the electrically conductive, high-resistance layer on the outside of the fuse link and the optoelectric display device in the contact cap is produced via an auxiliary contact in the interior of the contact cap.
  • the electrically conductive, high-resistance layer can be replaced by an electrically conductive, low-resistance layer or an electrically conductive wire and a high-resistance resistor network integrated in the optoelectric display device.
  • FIG. 3 shows an example of a high-resistance resistor network designed as a plastic insert, which consists of electrically conductive, high-resistance plastic.
  • This plastic part shown in Fig. 4 is shaped so that it is adapted to the inner surface of the insulating body 1 and can preferably be bent in the area of the contact caps 4.
  • This plastic part can be pressed or punched in a simple manner from a suitable high-resistance plastic, so that large-scale production is possible without any problems.
  • This plastic part is then inserted by hand or by machine into the cavity of the insulating body 1 of the fuse link and can be bent, for example, in the area of the lower contact cap 4 by a short heat treatment.
  • an intimate connection can be established both with the contact cap 4 and with the insulating body 1 by fitting the contact cap 4.
  • the plastic part 20 has a widened area on which an optoelectric display element 5 can be attached in a simple manner and can be contacted with the resistance network, for example by heating the connection contacts and pressing into the plastic insert.
  • the optoelectric display device can optionally be designed as a hybrid and / or layer circuit, which is advantageously inserted insulated into the front contact cap.
  • the hybrid circuit consists of a disk-shaped carrier material printed with resistance paste, which can also serve as a separating device 7, to which a light-emitting diode is applied as an optoelectric display element, for example with a conductive adhesive.
  • the hybrid circuit can be clamped between the contact cap 4 and the insulating body 1.
  • a low-resistance layer or another conductor on the inner surface of the fuse link connects the hybrid circuit to the second fuse contact via a contact on the carrier material.
  • the resistance network or the high-resistance layer can be designed in the form of an outer shell, partial shell and / or web made of conductive material, which is possibly partially insulated and into which the fuse link is inserted and inserted together with it into the fuse holder .
  • the optoelectric display device is attached in the area of the contact cap so that the light signal can be seen through the viewing window of the screw cap.

Landscapes

  • Fuses (AREA)
  • Ink Jet (AREA)
  • Safety Valves (AREA)
  • Air Bags (AREA)
  • Control Of Combustion (AREA)
EP86900088A 1984-11-14 1985-11-14 Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung Expired - Lifetime EP0202317B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86900088T ATE58259T1 (de) 1984-11-14 1985-11-14 Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3441588 1984-11-14
DE3441588 1984-11-14
DE3513833 1985-04-17
DE19853513833 DE3513833A1 (de) 1984-11-14 1985-04-17 Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung

Publications (2)

Publication Number Publication Date
EP0202317A1 EP0202317A1 (de) 1986-11-26
EP0202317B1 true EP0202317B1 (de) 1990-11-07

Family

ID=25826535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86900088A Expired - Lifetime EP0202317B1 (de) 1984-11-14 1985-11-14 Schmelzsicherungseinsatz mit optoelektrischer anzeigeeinrichtung

Country Status (13)

Country Link
US (1) US4641120A (enrdf_load_stackoverflow)
EP (1) EP0202317B1 (enrdf_load_stackoverflow)
JP (1) JPS62500827A (enrdf_load_stackoverflow)
AT (1) ATE58259T1 (enrdf_load_stackoverflow)
AU (1) AU592966B2 (enrdf_load_stackoverflow)
BR (1) BR8507050A (enrdf_load_stackoverflow)
CA (1) CA1250873A (enrdf_load_stackoverflow)
DD (1) DD239298A5 (enrdf_load_stackoverflow)
DE (2) DE3513833A1 (enrdf_load_stackoverflow)
ES (1) ES8702738A1 (enrdf_load_stackoverflow)
HU (1) HU195026B (enrdf_load_stackoverflow)
PL (1) PL151284B1 (enrdf_load_stackoverflow)
WO (1) WO1986003054A1 (enrdf_load_stackoverflow)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0744689B2 (ja) * 1985-11-22 1995-05-15 株式会社日立製作所 動き検出回路
US4821010A (en) * 1987-12-30 1989-04-11 Therm-O-Disc, Incorporated Thermal cutoff heater
SE9400036D0 (sv) * 1994-01-10 1994-01-10 Pharmacia Ab Low modecular weight hyaluronic acid
DE19800779B4 (de) 1998-01-12 2004-09-23 Klaus Bruchmann Sicherungshalter mit integrierter Anschlußleitung für Zustandsmelder
US5994993A (en) * 1998-07-31 1999-11-30 Flexcon Company, Inc. Fuse indicator label
AU2001290608A1 (en) * 2000-08-31 2002-03-13 Rytec Corporation Sensor and imaging system
US6456189B1 (en) 2000-11-28 2002-09-24 Ferraz Shawmut Inc. Electrical fuse with indicator
US6859131B2 (en) 2001-05-25 2005-02-22 Dan Stanek Diagnostic blown fuse indicator
TW534450U (en) * 2002-06-03 2003-05-21 Chuen-Ru Lin Fuse for breakdown indicator of automobile facilities
US7405646B2 (en) * 2002-06-26 2008-07-29 Littelfuse, Inc Multiple conductor indicator
WO2004023787A2 (en) * 2002-09-06 2004-03-18 Rytec Corporation Signal intensity range transformation apparatus and method
US20050062579A1 (en) * 2003-09-23 2005-03-24 Carrier Corporation Resettable fuse with visual indicator
US20080048819A1 (en) * 2005-05-05 2008-02-28 Cooper Technologies Company Modular Fuseholders With Wireless Communication Capabilities
US7636028B2 (en) * 2005-07-20 2009-12-22 Littelfuse, Inc. Diagnostic fuse indicator including visual status identifier
US7808362B2 (en) * 2007-08-13 2010-10-05 Littlefuse, Inc. Moderately hazardous environment fuse
US8674803B2 (en) * 2007-08-13 2014-03-18 Littelfuse, Inc. Moderately hazardous environment fuse
WO2019074470A1 (en) * 2017-10-09 2019-04-18 Keysight Technologies, Inc. MANUFACTURE OF HYBRID COAXIAL CABLE
US10806026B2 (en) 2018-07-12 2020-10-13 International Business Machines Corporation Modified PCB vias to prevent burn events
DE102018213522B4 (de) * 2018-08-10 2022-06-02 Siemens Aktiengesellschaft Schmelzsicherung, Sicherungskörper, System und Verfahren

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2079214A (en) * 1936-06-05 1937-05-04 Indicating Fuse Mfg Corp Indicating fuse
US2157777A (en) * 1937-04-08 1939-05-09 Ohio Carbon Company Resistor
US2206782A (en) * 1939-03-06 1940-07-02 Fuse Indicator Corp Plug fuse
DE829186C (de) * 1948-10-02 1952-01-24 Siemens Schuckertwerke A G Verfahren zur Bemessung des elektrischen Widerstandes von Schmelzleitern
AU7770575A (en) * 1974-02-04 1976-07-29 G I P Investments Ltd Safety fuse
JPS5336659A (en) * 1976-09-16 1978-04-05 Guim R Display device for the disconnection of fuse
US4148024A (en) * 1977-03-02 1979-04-03 Westinghouse Electric Corp. Capacitively coupled indicator for a submersible fuse
DE3103478A1 (de) * 1981-02-03 1982-08-26 Bernhard 5900 Siegen Thienel Schmelzsicherungspatrone
DE8322638U1 (de) * 1983-08-05 1984-01-05 Thienel, Bernhard, 5900 Siegen Schmelzsicherungspatrone

Also Published As

Publication number Publication date
ATE58259T1 (de) 1990-11-15
WO1986003054A1 (en) 1986-05-22
DD239298A5 (de) 1986-09-17
EP0202317A1 (de) 1986-11-26
US4641120A (en) 1987-02-03
ES544917A0 (es) 1986-12-16
HUT41155A (en) 1987-03-30
DE3513833A1 (de) 1986-05-22
JPS62500827A (ja) 1987-04-02
CA1250873A (en) 1989-03-07
PL151284B1 (en) 1990-08-31
ES8702738A1 (es) 1986-12-16
AU592966B2 (en) 1990-02-01
DE3513833C2 (enrdf_load_stackoverflow) 1989-04-13
BR8507050A (pt) 1987-03-10
AU5230286A (en) 1986-06-03
HU195026B (en) 1988-03-28
DE3580478D1 (de) 1990-12-13
PL256258A1 (en) 1986-10-07

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