SI24215B

SI24215B - Fuse with at least one melting element and ability of involuntary termination with electric circuit running trough it and with such fuse equipped electric circuit

Info

Publication number: SI24215B
Application number: SI201200320A
Authority: SI
Inventors: Mitja KoprivĹˇek
Original assignee: Razvojni Center Enem Novi Materiali D.O.O.
Priority date: 2012-10-25
Filing date: 2012-10-25
Publication date: 2020-12-31
Also published as: SI24215A

Abstract

Z namenom, da bi bilo možno električni tokokrog (C') iz različnih razlogov prisilno prekiniti tudi kadarkoli pred pojavom nadtoka, predlagana varovalka (1) z vsaj enim talilnim elementom (2), obsegajoča telo (10) iz električno izolacijskega materiala, s katerim je obdan vsakokrat razpoložljiv in nazivni vrednosti (I) električnega toka prirejen talilni element (2), ki je električno povezan z vsakokrat razpoložljivima električnima kontaktoma (11, 12), ki sta razporejena na zunanji površini omenjenega telesa(10) varovalke (1) in preko katerih je varovalka (1) električno povezljiva v vsakokrat razpoložljiv primarni električni tokokrog (C'), ki je s pomočjo varovalke (1) zaščiten proti nadtoku, po izumu pa tovrstna varovalka (1) obsega od električne napetosti odvisen upor (3), namreč varistor, katerega upornost je obratno sorazmerna z napetostjo, kateri je izpostavljen, pri čemer je omenjen upor (3) razporejen neposredno ob vsakokratnem talilnem elementu (2) in torej v toplotno-prevodnem stiku z omenjenimtalilnim elementom (2), in pri čemer je omenjeni upor (3) električno povezan v sekundarni električni tokokrog (C") z vsaj enim stikalom (4), ki ga je možno po potrebi aktivirati neodvisno od razmer v primarnem tokokrogu (C').In order to be able to forcibly interrupt the electrical circuit (C ') for various reasons at any time before the overcurrent occurs, the proposed fuse (1) with at least one fuse element (2) comprising a body (10) of electrically insulating material with which surrounded by each available and rated value (I) of the electric current is a melting element (2), which is electrically connected to each available electrical contacts (11, 12), which are arranged on the outer surface of said fuse body (10) and through which the fuse (1) is electrically connected to the always available primary electrical circuit (C '), which is protected against overcurrent by means of a fuse (1), and according to the invention such a fuse (1) comprises a voltage-dependent resistor (3), namely, a varistor whose resistance is inversely proportional to the voltage to which it is exposed, said resistor (3) being arranged directly adjacent to each melting element (2) and thus in the thermally conductive st with said melting element (2), and wherein said resistor (3) is electrically connected to a secondary electrical circuit (C ") by at least one switch (4) which can be activated, if necessary, independently of the conditions in the primary circuit (C). ').

Claims

1. Fuse (1) with a fusing element (2), which is suitable for interrupting the electric circuit passing through it and comprises a body (10) made of electrically insulating material, which is surrounded by a fusing element adapted to the nominal value (I) of the electric current at any time (2), which is electrically connected to the electrical contacts (11, 12) available at any time, which are arranged on the outer surface of the said body (10) of the fuse (1) and through which the fuse (1) can be electrically connected to the primary electrical circuit that is available at any time (C), which is then protected against overcurrent by means of a fuse (1), wherein said fuse (1) further comprises a resistor (3), wherein said resistor (3) is arranged directly next to the fusing element (2) and therefore in heat-conductive contact with said melting element (2), and wherein said resistance (3) is electrically connected to the secondary electrical circuit (C) with at least one switch (4) which can be activated, if necessary, independently of conditions in the primary circuit (C), characterized by the fact that the mentioned resistor represents a voltage-dependent resistor (3), namely a varistor (3), and the electrical resistance of the voltage-dependent resistor is inversely proportional to the voltage to which it is exposed,

2. The fuse according to claim 1, characterized by the fact that the fuse element (2) together with the mentioned resistor (3) inside the body (10) of the fuse (1) is surrounded by a filler for extinguishing the electric arc, in particular with quartz sand.

3. The fuse according to claim 1 or 2, characterized in that the secondary circuit (C), which includes said resistor (3), includes a switch (4), which is a remotely controlled switch.

4. A fuse according to any of the preceding claims, characterized by the fact that there are electrical connectors (11, 12) on the body (10), preferably on its outer surface, in addition to the fuse element (2), for connecting the fuse (1) in the primary electric circuit (C) provides at least two more electric connectors (13', 13) electrically connected to the mentioned resistor (3) for connecting the fuse (1) to the secondary electric circuit (C).

5. A fuse according to any of the preceding claims, characterized in that it comprises more than one fusing element (2), and each of the available fusing elements (2) is arranged in thermally conductive contact with said resistor (3).

6. An electrical circuit comprising a source (5) of electrical voltage and at least one consumer (6), characterized in that it also includes at least one fuse (1) according to any of claims 1 - 4.

7. Electric circuit according to claim 6, characterized in that the source (5) of electric voltage represents a source of direct electric voltage.