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
  • H01H85/303—Movable indicating elements

Definitions

• the invention relates to a fuse link, in particular for low-voltage, high-performance fuses, LV HRC fuses, the working fuse of which is monitored by an indicator fuse which is arranged electrically in parallel thereto, in that a signal element in a display device is tensioned against the train through the indicator fuse by means of a spring element is.
• Fuse links with a display device generally have a weakening of the body of the fuse link in the area of the display device. Especially with so-called
• Center indicators weaken the body in a critical area.
• display devices designed as center indicators on the market which work with a display bead made of glass or plastic.
• the display bead is in one through the display fuse element
• the recess is fixed in the body of the fuse link, the display fuse element being threaded through bores and connected in a contacting manner on connection plates or on the contact blades.
• the indicator bead is thrown out of the recess in the fuse body, which indicates the response of the fuse link.
• the falling out display bead and any spring elements required to ensure the display function can fall into systems and cause malfunctions or contamination.
• the invention has for its object to develop a fuse link that allows a clear display without falling parts and in which the body is not weakened by the display device.
• the described object is achieved by a fuse link according to claim 1.
• the display device has a signal element which is displaceably guided along the body of the fuse link and which is in a visual range when the
• Display fuse element shows the response status of the working fuse element due to its striking design.
• the signal element can be made of electrically non-conductive material, so that protection against accidental contact is inherent.
• the viewing area can also be a recess or a viewing window in a cover on the body surface. This mechanically protects the display device.
• the signal element can also consist of electrically conductive material. Regardless of the choice of material, it is particularly easy to increase the visual conspicuity through a viewing area in a cover.
• the field of vision can be easily carried out in the center of the back of the body, so that the function of a central indicator is achieved without the weakening of the body which is usual with central indicators.
• the signal element can advantageously be implemented in the viewing area in the shifted state in such a way that it differs in color from its color shown in the viewing area in the idle state, the distinguishing color also differing from the color of the cover and / or the color of the body of the melting insert stands out clearly.
• FIG. 2 shows the view of the back of the fuse link with the display device for the exemplary embodiment according to FIG.
• FIG 3 shows the fuse link according to the embodiment of FIG 1 in a view from the front.
• FIG. 4 the display device according to FIG. 1 is shown broken away and is shown enlarged.
• the fuse link according to FIG. 1 is designed as an NH fuse and is shown in longitudinal section.
• the fuse link has a working fuse element 1 and a display fuse element 2 which is electrically connected in parallel with this.
• the fuse link has a working fuse element 1 and a display fuse element 2 which is electrically connected in parallel with this.
• a display device 3 contains a signal element 5 which is displaceably guided along the body 4 of the melting insert and which in a viewing area 6, compare FIG
• Response of the display fuse element is shifted and indicates the response state of the working fuse element 1 by conspicuous execution.
• the signal element 5 of the display device 3 is tensioned against the train through the display fuse element 2 by means of a spring element 7.
• the spring element 7 is in the idle state under tension by the display fuse element 2 on the end plate 8. If the display fuse element 2 melts as a result of the melting of the working fuse element 1 with customary corresponding coordination, the spring element 7 released so that the attached signal element 5 is moved under a cover 9. In a visible area 6, the signal element 5 then appears in a conspicuous version when the fuse element 2 responds.
• connection in parallel connection of the display fuse element 2 to the working fuse element 1 takes place via the knife contacts 10 by spreading the spring element 7 on the knife contacts. If the spring element 7 consists of an insufficiently electrically conductive material, an electrically conductive layer can also be provided in the area between the attachment of the display fuse element 2 and the knife contact 10.
• the connection boards 8 can be made of insulating material. In such an embodiment, for reasons of protection against contact, it is advantageous to coat the spring element 7 in an electrically insulating manner.
• the signal element is designed in the form of a band in the viewing area 6, the viewing area being formed by a recess in the cover 9 on the body surface.
• the signal element has a signal effect in the viewing area 6 in the shifted state in that it differs from its color shown in the viewing area in the idle state, the distinguishing color also being different from the color of the cover 9 and the color of the body 4 of the melting insert.
• the conspicuous region 11 is drawn into the visible region 6.
• a colored marking can thus become visible in the viewing area 6, so that a kind of color change is achieved optically in a safe and economical manner.

Landscapes

• Fuses (AREA)
• Techniques For Improving Reliability Of Storages (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)
• Ink Jet (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8223090

Family Applications (1)

Country Status (10)

Cited By (7)

Families Citing this family (15)

Citations (2)

• 1997
  • 1997-07-28 ES ES97936668T patent/ES2145628T3/es not_active Expired - Lifetime
  • 1997-07-28 SI SI9730065T patent/SI0917723T1/xx unknown
  • 1997-07-28 HU HU0001844A patent/HU223174B1/hu not_active IP Right Cessation
  • 1997-07-28 CZ CZ1999377A patent/CZ287833B6/cs not_active IP Right Cessation
  • 1997-07-28 CN CNB971963940A patent/CN1163936C/zh not_active Expired - Fee Related
  • 1997-07-28 PL PL97331379A patent/PL185931B1/pl not_active IP Right Cessation
  • 1997-07-28 DE DE29718230U patent/DE29718230U1/de not_active Expired - Lifetime
  • 1997-07-28 WO PCT/EP1997/004094 patent/WO1998007172A1/de active IP Right Grant
  • 1997-07-28 AT AT97936668T patent/ATE191100T1/de not_active IP Right Cessation
  • 1997-07-28 DE DE59701331T patent/DE59701331D1/de not_active Expired - Lifetime
  • 1997-07-28 EP EP97936668A patent/EP0917723B1/de not_active Expired - Lifetime

Patent Citations (2)

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