SI25756A - Electro thermal fuse - Google Patents
Electro thermal fuse Download PDFInfo
- Publication number
- SI25756A SI25756A SI201800261A SI201800261A SI25756A SI 25756 A SI25756 A SI 25756A SI 201800261 A SI201800261 A SI 201800261A SI 201800261 A SI201800261 A SI 201800261A SI 25756 A SI25756 A SI 25756A
- Authority
- SI
- Slovenia
- Prior art keywords
- fuse
- conductor
- contacts
- spring
- housing
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims abstract description 54
- 229910000679 solder Inorganic materials 0.000 claims abstract description 20
- 239000000945 filler Substances 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000006004 Quartz sand Substances 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 239000012811 non-conductive material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000155 melt Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
-
- 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
- H01H85/36—Means for applying mechanical tension to fusible member
-
- 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
-
- 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
- H01H85/165—Casings
- H01H85/17—Casings characterised by the casing material
-
- 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
- H01H85/18—Casing fillings, e.g. powder
-
- 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
- H01H85/20—Bases for supporting the fuse; Separate parts thereof
- H01H85/203—Bases for supporting the fuse; Separate parts thereof for fuses with blade type terminals
Landscapes
- Fuses (AREA)
Abstract
Namen izuma je zasnovati električno termično varovalko, pri kateri bo ne glede na njen položaj ob prekoračitvi tudi razmeroma visoke nazivne vrednosti električne napetosti in/ali toka vsakokraten električni tokokrog skoznjo v kar najkrajšem času prekinjen, obenem pa bo zagotovljeno, da oblok, četudi bi do njega neposredno po prekinitvi tokokroga prišlo, ne bo imel nikakršnega omembe vrednega vpliva niti na varovalko samo niti na okolico v neposredni bližini varovalke. Po izumu je predvideno, da cevastoohišje (1) varovalke sestoji iz keramike, vsak izmed kontaktov (110, 120) na njem pa je opremljen z vsaj približno osrednje razporejeno skoznjo luknjo (111, 121), tako da je električni vodnik (2) vstavljen skozi luknji (111, 121) v omenjenih kontaktih (110, 120) in s pomočjo vsakokrat na zunanji strani varovalke razporejene spajke (3, 3') nerazstavljivo, vendar električno prevodno povezan z vsakim izmed omenjenih kontaktov (110, 120). Razen tega je omenjeni vodnik (2) v vzdolžni smeri varovalke na enemkoncu le-te podaljšan in zaključen s primerno razširitvijo (20) na tak način, da je okoli vodnika (2) v območju med omenjeno razširitvijo (20) in pripadajočim kontaktom (120) s spajko (3') vgrajena vzmet (4). Se nadalje je preostanek svetline (100) ohišja (1) varovalke, namreč območje med omenjenim vodnikom (2) in ohišjem (1) ter med omenjenima kontaktoma (110, 120), do vnaprej določene mere zapolnjeno s polnilom (5) iz kremenčevega peska.The purpose of the invention is to design an electric thermal fuse in which, regardless of its position, even if the relatively high nominal value of electric voltage and / or current is exceeded, each electrical circuit through it will be interrupted as soon as possible. it will occur immediately after the interruption of the circuit, it will not have any significant impact either on the fuse itself or on the surroundings in the immediate vicinity of the fuse. According to the invention, it is provided that the tubular housing (1) of the fuse consists of a ceramic, and each of the contacts (110, 120) on it is provided with at least approximately centrally arranged through hole (111, 121), so that the electrical conductor (2) is inserted through holes (111, 121) in said contacts (110, 120) and by means of a solder (3, 3 ') arranged on the outside of the fuse in each case inseparably but electrically conductively connected to each of said contacts (110, 120). In addition, said conductor (2) in the longitudinal direction of the fuse at one end thereof is extended and terminated by a suitable extension (20) in such a way that it is around the conductor (2) in the area between said extension (20) and the associated contact (120). ) with a solder (3 ') built-in spring (4). Furthermore, the remaining luminance (100) of the fuse housing (1), namely the area between said conductor (2) and the housing (1) and between said contacts (110, 120), is filled to a predetermined extent with a quartz sand filler (5). .
Description
Električna termična varovalkaElectric thermal fuse
Izum se nanaša na električno termično varovalko z značilnostmi, ki bodo podrobneje opisane v nadaljevanju. Po mednarodni patentni klasifikaciji tovrstni izumi s področja elektrike, namreč osnovnih električnih komponent, spadajo k električnim stikalom in zaščitnim sklopom, pri katerih tok teče skozi del talilnega materiala in se prekine ob premiku talilnega materiala zaradi prekomernega toka, pri čemer je ohišje napolnjeno s polnilnim materialom v praškasti obliki. Temu ustrezno je potem tovrsten izum lahko razvrščen v razred A 01 H 85/18.The invention relates to an electric thermal fuse with characteristics which will be described in more detail below. According to the international patent classification, such inventions in the field of electricity, namely basic electrical components, belong to electrical switches and protective assemblies in which the current flows through a part of the melting material and is interrupted by the movement of the melting material due to excessive current. in powder form. Accordingly, such an invention can then be classified in class A 01 H 85/18.
Pri tem pa izum temelji na problemu, kako zasnovati električno termično varovalko, pri kateri bo ne glede na njen položaj ob prekoračitvi tudi razmeroma visoke nazivne vrednosti električne napetosti in/ali toka vsakokraten električni tokokrog skozi varovalko v kar najkrajšem času prekinjen, obenem pa bo zagotovljeno, da oblok, četudi bi do njega neposredno po prekinitvi tokokroga prišlo, ne bo imel nikakršnega omembe vrednega vpliva niti na varovalko samo niti na okolico v neposredni bližini varovalke.However, the invention is based on the problem of how to design an electric thermal fuse, in which, regardless of its position, if the relatively high nominal value of electric voltage and / or current is exceeded, each electrical circuit through the fuse will be interrupted as soon as possible. that the arc, even if it occurs immediately after the interruption of the circuit, will not have any noteworthy effect either on the fuse itself or on the surroundings in the immediate vicinity of the fuse.
Električna termična varovalka je namenjena za zaščito električnega tokokroga, še zlasti pa tudi posameznih komponent električnega tokokroga, na primer varistorskih varovalk in drugih komponent za prenapetostno zaščito. To pomeni, da termična varovalka reagira na toploto, ki se zaradi električnih preobremenitev generira bodisi v njej sami ali pa tudi v sosednjih električnih komponentah v vsakokratnem tokokrogu. Tovrstna varovalka je opisana v JP 2016-162683 A in obsega cevasto ohišje iz električno neprevodnega materiala, na katerega koncih sta na voljo električna kontakta, preko katerih je varovalka električno povezljiva v vsakokraten električni tokokrog. V svetlini omenjenega cevastega ohišja je vgrajen električni vodnik, ki je po eni strani s pomočjo spajke povezan z enim izmed omenjenim kontaktov in po drugi strani z natezno vijačno vzmetjo, ki je pripeta na preostali kontakt. Ko pri vnaprej določeni električni preobremenitvi v tokokrogu pride do generiranja toplote, se le-ta prenese v notranjost varovalke do spajke v območju omenjenega stika med električnim vodnikom in pripadajočim kontaktom. Spajka se pri vnaprej določeni temperaturi stali, zaradi česar se povezava med omenjenim vodnikom in pripadajočim kontaktom prekine, nakar vzmet odvleče vodnik stran od omenjenega kontakta. Še zlasti v primerih, kadar gre za visokonapetostni tokokrog, se med odmikanjem vodnika od kontakta tvori močan oblok, ki lahko hitro poškoduje ohišje in v okolici varovalke lahko poškoduje predmete ali pa celo zaneti požar.An electric thermal fuse is intended to protect the electrical circuit, and in particular individual components of the electrical circuit, such as varistor fuses and other components for overvoltage protection. This means that the thermal fuse reacts to the heat generated due to electrical overloads either in itself or in the adjacent electrical components in each circuit. This type of fuse is described in JP 2016-162683 A and comprises a tubular housing made of electrically non-conductive material, at the ends of which there are electrical contacts through which the fuse is electrically connected to each electrical circuit. An electrical conductor is installed in the light of said tubular housing, which is connected on the one hand by means of a solder to one of said contacts and on the other hand by a tensile coil spring attached to the remaining contact. When heat is generated at a predetermined electrical overload in the circuit, it is transferred to the inside of the fuse to solder in the area of said contact between the electrical conductor and the associated contact. The solder melts at a predetermined temperature, as a result of which the connection between said conductor and the corresponding contact is broken, after which the spring pulls the conductor away from said contact. Especially in the case of a high-voltage circuit, a strong arc is formed when the conductor moves away from the contact, which can quickly damage the housing and can damage objects or even start a fire in the vicinity of the fuse.
Električna termična varovalka po izumu obsega cevasto ohišje iz električno neprevodnega materiala, ki je na vsakem izmed svojih koncev zaprto s pokrovom v funkciji kontakta iz električno prevodnega materiala, ki je predviden za povezavo varovalke v vsakokraten električni tokokrog. Skozi svetlino omenjenega cevastega ohišja je vstavljen električni vodnik, ki je med regularnim delovanjem varovalke, namreč kadar skoznjo po omenjenem vodniku lahko teče električni tok, preko vsaj enega spajkanega spoja električno povezan z omenjenima kontaktoma, v primeru električne preobremenitve v tokokrogu pa zaradi generirane toplote in taljenja ter s tem prekinitve vsaj enega spajkanega spoja s pomočjo vzmeti premakljiv v smeri vstran od vsaj enega izmed omenjenih kontaktov, s čimer se potem električni tokokrog skozi varovalko prekine.The electric thermal fuse according to the invention comprises a tubular housing made of electrically non-conductive material, which is closed at each of its ends by a cover in the function of a contact made of electrically conductive material, which is provided for connecting the fuse to each electrical circuit. An electrical conductor is inserted through the light of said tubular housing, which is electrically connected to said contacts through at least one soldered connection during the regular operation of the fuse, namely when an electric current can flow through said conductor, and in case of electric overload in the circuit melting and thus breaking at least one soldered joint by means of a spring movable in a direction away from at least one of said contacts, whereby the electrical circuit through the fuse is then interrupted.
Po izumu je predvideno, da omenjeno cevasto ohišje sestoji iz keramike, vsak izmed omenjenih kontaktov pa je opremljen z vsaj približno osrednje razporejeno skoznjo luknjo, tako da je električni vodnik vstavljen skozi luknji v omenjenih kontaktih in s pomočjo vsakokrat na zunanji strani varovalke razporejene spajke nerazstavljivo, vendar električno prevodno povezan z vsakim izmed omenjenih kontaktov. Pri tem je omenjeni vodnik v vzdolžni smeri varovalke na enem koncu le-te podaljšan in zaključen s primerno razširitvijo na tak način, da je okoli vodnika v območju med omenjeno razširitvijo in pripadajočim kontaktom s spajko lahko vgrajena vzmet. Obenem je preostanek svetline ohišja varovalke, namreč območje med omenjenim vodnikom in ohišjem ter med omenjenima kontaktoma, do vnaprej določene mere zapolnjeno s protiobločnim polnilom iz kremenčevega peska vnaprej določene granulacije.According to the invention, said tubular housing consists of a ceramic, and each of said contacts is provided with at least approximately centrally arranged through a hole, so that an electrical conductor is inserted through the holes in said contacts and by means of a solder permanently arranged on the outside of the fuse , but electrically conductively connected to each of said contacts. In this case, said conductor in the longitudinal direction of the fuse at one end thereof is extended and terminated with a suitable extension in such a way that a spring can be installed around the conductor in the area between said extension and the corresponding contact with the solder. At the same time, the residual luminosity of the fuse housing, namely the area between said conductor and the housing and between said contacts, is filled to a predetermined extent with a quartz sand filler of a predetermined granulation.
Pri prednostni izvedbi izuma omenjeni vodnik predstavlja bakrena žica z vnaprej določenim okroglim prečnim prerezom, omenjeno vzmet pa predstavlja tlačna vijačna vzmet. Med vzmetjo in razširitvijo na vodniku pa je po izbiri lahko vgrajena podložka za podpiranje vzmeti.In a preferred embodiment of the invention, said conductor is a copper wire with a predetermined circular cross section, and said spring is a compression coil spring. An optional spring support washer can be installed between the spring and the extension on the guide.
Količina omenjenega protiobločnega polnila iz kremenčevega peska je smotrno tako izbrana, da volumen polnila predstavlja približno 90% vsega v svetlini ohišja okoli vodnika razpoložljivega prostora. Tudi omenjena spajka za povezavo vodnika z vsakokrat pripadajočim kontaktom je smotrno tako izbrana, da temperatura njenega tališča znaša 105-115 °C.The amount of said quartz sand anti-cloud filler is expediently chosen so that the volume of the filler represents about 90% of the total in the light of the housing around the conductor of the available space. The above-mentioned solder for connecting the conductor to the corresponding contact is expediently selected so that its melting point is 105-115 ° C.
Izum bo v nadaljevanju obrazložen s primerom izvedbe, ki je prikazan na priloženi skici, kjer kažeThe invention will be further illustrated by an exemplary embodiment shown in the accompanying drawing, where shown
Sl. 1 električno termično varovalko po izumu v izometriji;Sl. 1 isometric electrical thermal fuse according to the invention;
Sl. 2 varovalko po Sl. 1 v narisu;Sl. 2 a fuse according to FIG. 1 in the sketch;
Sl. 3 pa varovalko po Sl. 1 in 2 v vzdolžnem prerezu v diametralni ravnini.Sl. 3 and the fuse according to FIG. 1 and 2 in longitudinal section in the diametrical plane.
Električna termična varovalka po izumu v splošnem tudi v izvedbi po Sl. 1 - 3 obsega cevasto ohišje 1 iz električno neprevodnega materiala, ki je na vsakem izmed svojih koncev 11, 12 zaprto s pokrovom v funkciji kontakta 110, 120 iz električno prevodnega kovinskega materiala, ki je predviden za povezavo varovalke v vsakokraten električni tokokrog. Skozi svetlino 10 omenjenega cevastega ohišja 1 je vstavljen električni vodnik 2.The electric thermal fuse according to the invention is also generally in the embodiment according to FIG. 1 - 3 comprises a tubular housing 1 made of electrically non-conductive material, which is closed at each of its ends 11, 12 by a cover in the function of contact 110, 120 made of electrically conductive metal material, which is provided for connecting a fuse to each electrical circuit. An electrical conductor 2 is inserted through the lumen 10 of said tubular housing 1.
Omenjeni vodnik 2 je v splošnem med regularnim delovanjem varovalke, namreč kadar skoznjo po omenjenem vodniku 2 lahko teče električni tok, preko vsaj enega spajkanega spoja 3, 3' električno povezan z omenjenima kontaktoma 110, 120, v primeru električne preobremenitve v tokokrogu pa zaradi generirane toplote in taljenja ter s tem prekinitve vsaj enega spajkanega spoja 3, 3' s pomočjo vzmeti 4 premakljiv v smeri vstran od vsaj enega izmed omenjenih kontaktov 110, 120, s čimer se potem električni tokokrog skozi varovalko prekine.Said conductor 2 is generally electrically connected to said contacts 110, 120 during at least one soldered connection 3, 3 'during the regular operation of the fuse, namely when an electric current can flow through said conductor 2, and in case of electric overload in the circuit due to the generated heat and melting and thus breaking at least one soldered joint 3, 3 'by means of a spring 4 movable in a direction away from at least one of said contacts 110, 120, whereby the electrical circuit through the fuse is then interrupted.
Po izumu je predvideno, da omenjeno cevasto ohišje (1) sestoji iz keramike, zato je ohišje 1 ne le električno neprevodno, temveč tudi odporno proti visokim temperaturam in negorljivo.According to the invention, it is provided that said tubular housing (1) consists of a ceramic, so that the housing 1 is not only electrically non-conductive, but also resistant to high temperatures and non-combustible.
Vsak izmed omenjenih kontaktov 110, 120 je opremljen z vsaj približno osrednje razporejeno skoznjo luknjo 111, 121, tako daje električni vodnik 2 vstavljen skozi luknji 111, 121 v omenjenih kontaktih 110, 120 in s pomočjo vsakokrat na zunanji strani varovalke razporejene spajke 3, 3' nerazstavljivo, vendar električno prevodno povezan z vsakim izmed omenjenih kontaktov 110, 120. Razen tega je omenjeni vodnik 2 v vzdolžni smeri varovalke na enem koncu le-te podaljšan in zaključen s primemo razširitvijo 20 na tak način, da je okoli vodnika 2 v območju med omenjeno razširitvijo 20 in pripadajočim kontaktom 120 s spajko 3' vgrajena vzmet 4.Each of said contacts 110, 120 is provided with at least approximately centrally arranged through hole 111, 121, so that an electrical conductor 2 is inserted through holes 111, 121 in said contacts 110, 120 and by means of a solder 3, 3 arranged on the outside of the fuse. 'inseparably but electrically conductively connected to each of said contacts 110, 120. In addition, said conductor 2 is elongated in the longitudinal direction of the fuse at one end thereof and terminated by a suitable extension 20 in such a way that around the conductor 2 in the range a spring 4 is mounted between said extension 20 and the corresponding contact 120 with the solder 3 '.
Preostanek svetline 10 ohišja 1 varovalke, namreč območje med omenjenim vodnikom 2 in ohišjem 1 ter med omenjenima kontaktoma 110, 120, je do vnaprej določene mere zapolnjeno s protiobločnim polnilom 5 iz kremenčevega peska, pri čemer granulacija slednjega prednostno znaša 0,2 - 0,4 mm. Količina polnila 5 iz kremenčevega peska tako izbrana, da volumen polnila 5 predstavlja približno 90% vsega v svetlini 10 ohišja 1 okoli vodnika 2 razpoložljivega prostora.The residual luminosity 10 of the fuse housing 1, namely the area between said conductor 2 and the housing 1 and between said contacts 110, 120, is filled to a predetermined extent with a quartz sand filler 5, the granulation of the latter preferably being 0.2-0, 4 mm. The amount of filler 5 made of quartz sand is selected so that the volume of the filler 5 represents about 90% of the total in the light 10 of the housing 1 around the conductor 2 of the available space.
V prikazanem primeru izuma omenjeno vzmet 4 predstavlja tlačna vijačna vzmet, obenem pa je med vzmetjo 4 in razširitvijo 20 na vodniku 2 vgrajena podložka 41 za podpiranje vzmeti 4. S tem je po namestitvi in kompresiji vzmeti 4 okoli vodnika 2 in zatem še omenjene podložke 41 preko vzmeti že zgolj s sploščenjem vodnika 2 možno realizirati razširitev 20, s katero je potem vzmet 4 vse do taljenja spajke 3, 3' držana v stisnjenem stanju.In the illustrated example of the invention, said spring 4 represents a compression coil spring, and at the same time a spring 41 is installed between the spring 4 and the extension 20 on the conductor 2 to support the spring 4. Thus, after installation and compression, the spring 4 around the conductor 2 via the spring only by flattening the conductor 2 it is possible to realize an extension 20, with which the spring 4 is then kept in a compressed state until the solder 3, 3 'melts.
Pri prednostni izvedbi varovalke po izumu omenjeni vodnik 2 predstavlja bakrena žica z vnaprej določenim okroglim prečnim prerezom, ki znaša npr. 1,5 mm2. Za tako izbran vodnik 2 potem zadostuje, če sta v kontaktih 110, 120 na voljo skoznji luknji 111, 121 premera 1,5 mm. Spajka 3, 3' za povezavo vodnika 2 z vsakokrat pripadajočim kontaktom 110, 120 tako izbrana, da temperatura njenega tališča znaša 105 - 115 °C, najbolj smotrno, npr. zaradi zaščite varistorjev v vgrajenih varistorjev, pa približno 109 ali 110°C.In a preferred embodiment of the fuse according to the invention, said conductor 2 represents a copper wire with a predetermined round cross-section of e.g. 1.5 mm 2 . For the conductor 2 thus selected, it is then sufficient if through holes 110, 120 with a diameter of 1.5 mm are available in contacts 110, 120. The solder 3, 3 'for connecting the conductor 2 to the respective contact 110, 120 is selected so that its melting point is 105 - 115 ° C, most preferably, e.g. to protect the varistors in the built-in varistors, about 109 or 110 ° C.
Ko varovalko vgradimo v električni tokokrog, električni tok teče skozi prvi kontakt 110, spajko 3, električno vodnik 2, spajko 3' in drugi kontakt 120. Električni vodnik 2 je obdan s polnilom 5. Če/ko v električnem tokokrogu pride do prekomernega in temperatura preseže vnaprej določeno vrednost, ki ustreza temperaturi tališča vsakokratne spajke 3, 3', npr. 105°C ali pa 109°C, če je kemična sestava spajke 3, 3' temu primemo izbrana, se spajka 3, 3' stali, nakar pride do sprostitve pred tem stisnjene tlačne vzmeti 4, ki potem premakne vodnik 2 v aksialni smeri vstran od vsaj enega kontakta 110, 120. Odmik omenjenega vodnika 2 od kontakta 110, 120 bi zlasti v visokonapetostnem tokokrogu lahko privedel do pojava obloka med vodnikom in kontaktom 110, 120, vendar pa je za tak primer po izumu predvideno, da je razpoložljiv prostor v notranjosti ohišja 1 med slednjim in polnilom na ustrezen način t.j. do določene mere zapolnjen s polnilom 5 iz kremenčevega peska. Izbira primerne granulacije peska v polnilu 5 in količine polnila 5 glede na razpoložljiv volumen v ohišju 1 sta pomembni iz dveh razlogov. Po eni strani je namreč preprečeno, da bi zaradi prevelike količine polnila 5 kremenčev pesek, ki je sicer podobno kot keramika v ohišju 1 odporen proti visokim temperaturam in negorljiv, med premikanjem vodnika 2 v aksialni smeri v katerem izmed možnih položajev varovalke, npr. vodoravnem navpičnem ali poševnem, zaradi svoje abrazivnosti predstavljal tolikšno oviro, da bi se s tem kljub zadostni sili vzmeti 4 premikanje vodnika 2 upočasnilo, kar bi poslabšalo odzivnost varovalke na preobremenitve oz. podaljšalo čas odklopa oz. prekinjanja električnega tokokroga, v katerem je varovalka vgrajena. Po drugi strani pa je primerna izbira količine in granulacije paska v polnilu 5 pomembna tudi za to, da med premikanjem vodnika 2 v aksialni smeri pesek polnila sproti zasipa oz. zapolnjuje praznino, ki se zaradi odmikanja vodnika 2 od kontakta 110, 120 ustvarja za odmikajočim se vodnikom 2, s čimer se prostor, v katerem bi se sicer lahko formiral oblok, sproti zapolnjuje z negorljivim in proti visokim temperaturam odpornim kremenčevim peskom polnila 5.When the fuse is installed in the electrical circuit, the electric current flows through the first contact 110, solder 3, electrical conductor 2, solder 3 'and second contact 120. The electrical conductor 2 is surrounded by charger 5. If / when an excessive current occurs in the electrical circuit and temperature exceeds a predetermined value corresponding to the melting temperature of each solder 3, 3 ', e.g. 105 ° C or 109 ° C, if the chemical composition of the solder 3, 3 'is selected, the solder 3, 3' melts, after which the previously compressed compression spring 4 is released, which then moves the conductor 2 in the axial direction to the side. from at least one contact 110, 120. The deviation of said conductor 2 from contact 110, 120 could lead to an arc between the conductor and contact 110, 120, especially in a high-voltage circuit, but for such a case according to the invention it is provided that the available space in inside the housing 1 between the latter and the filler in a suitable manner, ie to some extent filled with a quartz filler 5. The choice of a suitable granulation of sand in the filler 5 and the amount of filler 5 according to the available volume in the housing 1 are important for two reasons. On the one hand, it is prevented that, due to the excessive amount of filler 5, quartz sand, which is otherwise similar to ceramics in housing 1, is resistant to high temperatures and non-combustible during the movement of conductor 2 in the axial direction in any of the possible fuse positions, e.g. horizontal vertical or oblique, due to its abrasiveness was such an obstacle that, despite the sufficient force of the spring 4, the movement of the conductor 2 would slow down, which would impair the response of the fuse to overloads or. extended the disconnection time or interrupting the electrical circuit in which the fuse is installed. On the other hand, the appropriate choice of the amount and granulation of the strip in the filler 5 is also important for the fact that during the movement of the conductor 2 in the axial direction, the sand of the filler is constantly backfilled or. fills the void created by the displacement of the conductor 2 from the contact 110, 120 behind the retractable conductor 2, whereby the space in which the arc could otherwise form is continuously filled with non-combustible and high temperature resistant quartz sand filler 5.
Zahvaljujoč tovrstni zasnovi je na razmeroma preprost način varovalka po izumu lahko izjemno učinkovita tudi v visokonapetostnih električnih tokokrogih, in sicer ne glede na položaj vgradnje varovalke.Thanks to this type of design, the fuse according to the invention can be extremely effective in high-voltage electrical circuits in a relatively simple way, regardless of the position of the fuse installation.
Claims (6)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201800261A SI25756B (en) | 2018-11-29 | 2018-11-29 | Electro thermal fuse |
| PCT/SI2018/000026 WO2020112031A1 (en) | 2018-11-29 | 2018-12-05 | Electro thermal fuse |
| EP18836667.8A EP3888114B1 (en) | 2018-11-29 | 2018-12-05 | Electro thermal fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201800261A SI25756B (en) | 2018-11-29 | 2018-11-29 | Electro thermal fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SI25756A true SI25756A (en) | 2020-06-30 |
| SI25756B SI25756B (en) | 2023-06-30 |
Family
ID=65041832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SI201800261A SI25756B (en) | 2018-11-29 | 2018-11-29 | Electro thermal fuse |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3888114B1 (en) |
| SI (1) | SI25756B (en) |
| WO (1) | WO2020112031A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2296627A (en) * | 1937-10-30 | 1942-09-22 | Gen Electric | Time lag fuse |
| GB1033814A (en) * | 1963-06-27 | 1966-06-22 | English Electric Co Ltd | Improvements in or relating to electrical fuse-links |
| JP2016162683A (en) * | 2015-03-04 | 2016-09-05 | 株式会社オリエント | High voltage electric circuit protection fuse |
-
2018
- 2018-11-29 SI SI201800261A patent/SI25756B/en not_active IP Right Cessation
- 2018-12-05 EP EP18836667.8A patent/EP3888114B1/en active Active
- 2018-12-05 WO PCT/SI2018/000026 patent/WO2020112031A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020112031A1 (en) | 2020-06-04 |
| SI25756B (en) | 2023-06-30 |
| EP3888114A1 (en) | 2021-10-06 |
| EP3888114B1 (en) | 2022-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7724122B2 (en) | Fuse providing circuit isolation and visual interruption indication | |
| US7483252B2 (en) | Circuit protection device | |
| USRE42319E1 (en) | Circuit protection device | |
| US6795290B2 (en) | Surge arrestor | |
| SI23462A (en) | Varistor fuse | |
| CA2060641C (en) | Surge absorber | |
| JP2009540777A (en) | Overcurrent protection device with an additional mechanical trip, preferably formed as a trip bolt, for use in an overvoltage protector | |
| US10049795B2 (en) | Surge protection device, comprising at least one surge arrester and one thermally trippable switching device connected in series with the surge arrester | |
| JP2015185843A (en) | Surge protector | |
| US20170222426A1 (en) | Surge protection device with an independent chamber comprising a fuse for overcurrent protection | |
| ES2939155T3 (en) | Fuse cutout with integrated measurement function | |
| SI25756A (en) | Electro thermal fuse | |
| KR101458720B1 (en) | Thermally fused mov device and circuitry | |
| KR101514956B1 (en) | Complex fuse for preventing over-heating and over-current | |
| EP3776604A1 (en) | Three phase surge protection device | |
| SI24775A (en) | The device for the interruption of the primary electrical circuit in the electric vehicle, particularly in the event of a collision of the vehicle | |
| KR101987019B1 (en) | Power type thermal fuse resistor and method of manufacturing same | |
| JP2020068196A (en) | Fuse resistor assembly and manufacturing method thereof | |
| EP4270687A2 (en) | Varistor component and method for securing a varistor component | |
| JP6934681B2 (en) | Fuse resistor assembly and manufacturing method of fuse resistor assembly | |
| CA2579932C (en) | Fuse providing circuit isolation and visual interruption indication | |
| SU1050007A1 (en) | Multi-wire fuse link | |
| KR20200047251A (en) | Fuse resistor assembly and method for manufacturing fuse resistor assembly | |
| CZ30759U1 (en) | A voltage limiter with a short-circuit device | |
| CZ2017248A3 (en) | A voltage limiter with a short-circuit device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OO00 | Grant of patent |
Effective date: 20200630 |
|
| OU02 | Decision according to article 73(2) ipa 1992, publication of decision on partial fulfilment of the invention and change of patent claims |
Effective date: 20230510 |
|
| KO00 | Lapse of patent |
Effective date: 20240813 |