NO134286B

NO134286B -

Info

Publication number: NO134286B
Application number: NO1092/72A
Authority: NO
Inventors: A T Balevski; I D Nikolov
Original assignee: Inst Metalosanie I Techn Na Me
Priority date: 1971-04-07
Filing date: 1972-03-29
Publication date: 1976-06-08
Also published as: NO134286C; GB1386154A; DE2215816A1; DK131275C; ATA296572A; FR2132679B1; SE375471B; DK131275B; DD95268A5; CA986278A; FR2132679A1; SU522776A3; AT329786B; NL7204626A; BE781716A; US3880221A; IT967041B

Description

Kontaktanordning omfattende knivkontakt og ledningstilslutningsklemme Contact device comprising knife contact and wire connection clamp

på sikringsunderdel for håndtaksikring. on safety lower part for handle protection.

Foreliggende oppfinnelse vedrører en The present invention relates to a

kontaktanordning omfattende knivkontakt contact device comprising knife contact

og ledningstilslutningsklemme på sikringsunderdel for håndtakssikring for høy effekt og lav spenning. Slike håndtaksikringer anvendes i stor utstrekning i elektriske and wire connection clamp on fuse base for handle fuse for high power and low voltage. Such handle fuses are used to a large extent in electrics

anlegg, spesielt i kapslede fordelingssen-traler e. 1. I slike anlegg er plassen som facilities, especially in encapsulated distribution centers e. 1. In such facilities, the space which

regel meget begrenset, hvorfor det er gun-stig at sikringene er så lite plasskrevende usually very limited, which is why it is advantageous that the fuses take up so little space

som mulig. Dette gjelder spesielt deres utstrekning i smelteinnsatsens lengderetning og deres bredde. Dybden er som regel as possible. This particularly applies to their extent in the longitudinal direction of the melting insert and their width. The depth is usually

mindre kritisk bl. a. fordi smelteinnsat-sene uttaes i denne retning og et relativt less critical a. because the melting inserts are taken out in this direction and relatively

rikelig svingerom derfor må foreligge. there must therefore be ample room for maneuver.

Klemer for tilkoblingskablene anordnes Clamps for the connection cables are provided

som regel i smelteinnsatsenes lengderetning, slik at de rager ut utenfor kontakt-knivenes ender i hver retning. Ved høye usually in the longitudinal direction of the melting inserts, so that they protrude beyond the ends of the contact knives in each direction. At high

strømstyrker f. eks. opp til 200 å 400 A, amperage, e.g. up to 200 to 400 A,

hvilke krever grove kontaktklemmer og which require rough contact clamps and

grove tilkoblingskabler, påvirker kontakt-klemmene i vesentlig grad sikringens lengde og også dens bredde. coarse connection cables, the contact terminals significantly affect the fuse's length and also its width.

Hensikten med oppfinnelsen er å til-veiebringe en kontaktanordning for sik-ringsunderdeler til håndtaksikringer for The purpose of the invention is to provide a contact device for fuse parts for handle fuses for

høy effekt og lav spenning, spesielt for høye high power and low voltage, especially for high

strømstyrker (opp til 200 å 400 A),slik utført currents (up to 200 to 400 A), as performed

og montert at sikringen får minimal lengde and fitted so that the fuse has a minimum length

og minimal bredde, dvs. at sikringens lengde stort sett ikke overskrider smelteinnsatsens totale lengde og bredden stort sett and minimal width, i.e. that the length of the fuse generally does not exceed the total length and width of the melting insert

ikke overskrider smelteinnsatsens bredde. does not exceed the width of the melting insert.

Kontaktanordningen er stort sett montert The contact device is mostly installed

innenfor ytterkantene på smelteinnsatsens within the outer edges of the melting insert

kontaktkniver og kjennetegnes ved at den omfatter en U-formet stålbøyle, (fortrinsvis med rektangulært materialtverrsnitt), hvis profilplan er vinkelrett mot underdelens sokkelplan og hvis grener er paral-lelle med det sistnevnte plan, og at kontaktgaffelen som er utført fortrinsvis i ett stykke og utgjøres av en skinne av kobber eller annet godt ledende materiale, er festet på bøylens ytre gren og omslutter størstedelen av grenens overflate, først og fremst dens innerflate og sideflater, og at kontaktanordningens utstrekning i smelteinnsatsenes lengderetning er lik eller mindre enn kontaktknivens frie lengde, samt at stålbøylens indre gren med ytter-siden er fasttrukket mot underdelens forside. contact knives and is characterized by the fact that it comprises a U-shaped steel hoop, (preferably with a rectangular material cross-section), whose profile plane is perpendicular to the base plane of the lower part and whose branches are parallel to the latter plane, and that the contact fork, which is made preferably in one piece and consists of a rail of copper or other highly conductive material, is attached to the outer branch of the hoop and encloses the majority of the surface of the branch, primarily its inner surface and side surfaces, and that the extent of the contact device in the longitudinal direction of the melting inserts is equal to or less than the free length of the contact knife, and that the inner branch of the steel hoop with the outer side is pulled firmly against the front of the lower part.

På tegningen vises to utførelsesek-sempler av kontaktanordningen ifølge oppfinnelsen med forskjellige utførelser av den stålbøyle som bærer kontaktgaffelen. The drawing shows two design examples of the contact device according to the invention with different designs of the steel hoop that carries the contact fork.

Med tegningens hjelp forklares anordnin-gen. With the help of the drawing, the device is explained.

Fig. 1 resp. 2 er en perspektivskisse av Fig. 1 or 2 is a perspective sketch of

sikringens ene ende, one end of the fuse,

fig. la resp. 2a er et endeoppriss, og fig. lb resp. 2b er et sideoppriss. fig. let or 2a is an end elevation, and fig. lb or 2b is a side elevation.

I fig. 1 betegner 1 smelteinnsatsen og 2 dens ene kontaktkniv. Med 3 betegnes en In fig. 1 denotes 1 the melting insert and 2 its one contact knife. 3 denotes one

kontaktanordning montert på en sikringsunderdel. Kontaktanordningen består av en U-formet stålbøyle 4 med rektangulært contact device mounted on a fuse base. The contact device consists of a U-shaped steel hoop 4 with rectangular

tverrsnitt samt med en ytre gren 5 og en indre 6. Bøylen 4 kan være fremstillet av profilstål eller platestål. Den er i dette ek-sempel fasttrukket mot underdelens isola- cross-section and with an outer branch 5 and an inner 6. The brace 4 can be made of profile steel or plate steel. In this example, it is tightened against the lower part's insulation

sjonssokkel 7 på en slik måte at dens profilplan er parallelt med kontaktknivens 2 plan. Fasttrekningen skjer mot grenens 6 ytterside med bare en skrue, idet minst en kant på grenen 6 ligger an mot en side av en uttagning i sokkelen 7, hvilken uttagning opptar grenen 6 slik at en dreining av stålbøylen hindres. Stålbøylens 4 ytre gren 5 bærer kontaktgaffelen 8. Denne sistnevnte er fremstillet i ett stykke av forholdsvis tynt kobberbånd. Kobberbån- sion base 7 in such a way that its profile plane is parallel to the plane of the contact knife 2. The fastening takes place against the outer side of the branch 6 with only one screw, as at least one edge of the branch 6 rests against one side of a recess in the base 7, which recess accommodates the branch 6 so that a rotation of the steel hoop is prevented. The outer branch 5 of the steel bracket 4 carries the contact fork 8. The latter is made in one piece of relatively thin copper strip. copper rail-

dets bredde er noe mindre enn kontaktknivens 2 frie lengde og omslutter stort sett som en hylse stålbøylens 4 ytre gren 5, its width is somewhat smaller than the free length of the contact knife 2 and largely encloses the outer branch 5 of the steel hoop 4 like a sleeve,

idet dens frie ender danner kontaktslisser. Kontaktgaffelen 8 sikres i sin stilling mot dreining av skruene 9, beregnet for fast-trekning av tilkoblingskabelen 11. Skruene 9 er fritt forløpende gjennom grenen 5 og det kobberbånd, som danner kontaktgaffelen. Kontakttrykket forsterkes ved stål-bøylene 10 av fjærstål. Tilkoblingen til kontaktanordningen er anordnet på en slik måte at tilslutningskabelens 11 aviso- as its free ends form contact slots. The contact fork 8 is secured in its position against turning by the screws 9, intended for fastening the connection cable 11. The screws 9 are free running through the branch 5 and the copper strip which forms the contact fork. The contact pressure is reinforced by the steel hoops 10 of spring steel. The connection to the contact device is arranged in such a way that the connection cable's 11

lerte ende presses mot den del av kontaktgaffelen 8, som dekker grenens 5 indre flate, av en metallplate 12, hvis utstrekning er omtrent den samme som grenens indre flate og som trykkes mot kabelens 11 ende av de to skruer 9, som er gjenget i platen 12. leather end is pressed against the part of the contact fork 8, which covers the inner surface of the branch 5, by a metal plate 12, the extent of which is approximately the same as the inner surface of the branch and which is pressed against the end of the cable 11 by the two screws 9, which are threaded into the plate 12.

Utførelseseksempler ifølge fig. 2, 2a, Design examples according to fig. 2, 2a,

2b skiller seg prinsipielt fra eksemplet ifølge fig. 1, la, lb ved at stålbøylens 4 profilplan er vinkelrett mot kontaktknivens 2 plan. Herav betinges stort sett for-skjellen i utførelse av kontaktgaffelen 8. 2b differs in principle from the example according to fig. 1, la, lb in that the profile plane of the steel hoop 4 is perpendicular to the plane of the contact knife 2. This largely accounts for the difference in design of the contact fork 8.

Den er utført i U-form og omslutter stål-bøylens 4 gren 5 på innsiden og sidene samt er fastnittet mot dens innside. Kontaktgaffelens 8 grener er oppslisset, idet to kontaktflater dannes av hver bøyle ved vinkelbøyning av to fliker 13 (fig. 2a, 2b). Kontakttrykket økes også her av to stål-bøyler 10, hvis ender trykker mot hver sin av flikene 13. It is made in a U-shape and encloses the steel hoop 4 branch 5 on the inside and sides and is riveted to its inside. The contact fork's 8 branches are slit, as two contact surfaces are formed by each hoop by angular bending of two tabs 13 (fig. 2a, 2b). The contact pressure is also increased here by two steel hoops 10, the ends of which press against each of the tabs 13.

Av utførelseseksemplene er eksemplet ifølge fig. 1 beregnet for en tilslutnings-kabel med maksimalt 300 mm2 kobber-areal tilsvarende en merkestrøm av 400A, mens tilsvarende verdier for eksemplet ifølge fig. 2 er 120 mm2 og 200A. Of the design examples, the example according to fig. 1 calculated for a connection cable with a maximum 300 mm2 copper area corresponding to a rated current of 400A, while corresponding values for the example according to fig. 2 is 120 mm2 and 200A.

Av tegningen fremgår det klart at en sikring med kontaktanordningen ifølge oppfinnelsen har minimal lengde og mini- It is clear from the drawing that a fuse with the contact device according to the invention has minimal length and minimal

mal bredde. Dybden er ikke så meget større enn den som foreligger for en kjent sik- template width. The depth is not that much greater than that available for a known

ring at dette har noen praktisk betydning. call that this has any practical significance.

Claims

1. Contact device comprising knife contact and wire connection clamp on

fuse base for handle fuse with high power and low voltage, made so that the fuse has minimal length and minimal width, characterized in that the contact device (3) comprises a U-shaped steel hoop (4), (preferably with a rectangular material cross-section), whose profile plane is perpendicular to the safety lower part's base plane, and whose branches are parallel to the latter plane, and that the knife-contact fork (8), which is made preferably in one piece, and consists of a rail of copper or other well-conducting material, is attached to the bracket's (4 ) outer branch (5) and encloses most of the surface of this branch, especially its inner surface and side surfaces, and that the extent of the contact device in the longitudinal direction of the melting insert i(l) is largely equal to or less than the free length of the contact knife (2), and that the hoop (4 ) inner branch (6) with its outer side is firmly pulled against the front of the lower part (7).

2. Device as stated in claim 1, characterized in that the disconnected end of the connection cable (11) towards the contact device (3) is provided with a metal piece (12) with approximately the same extent as the inside of the hoop (4) branch (5) which carries the knife contact fork (8), the metal piece (12) being attracted with preferably two screws (9) towards the part of the contact fork (8) which covers the inside of the branch (5), for clamping the cable.

3. Device as stated in claims 1 and 2, characterized in that the profile plane of the steel hoop (4) is arranged parallel to the plane through the slot of the contact fork (8). (Fig. 1).

4. Device as stated in claims 1 and 2, characterized in that the profile plane of the steel hoop (4) is arranged perpendicular to the plane through the slot of the contact fork (8). (Fig. 2).

5. Device as stated in claims 1-3, characterized in that the contact fork (8) is bent so that it surrounds the branch (5) of the U-shaped hoop as a largely closed sleeve, and that its free ends form contact slots, the contact fork (8) is secured in its position by the connection screws (9) for the cable (11) being threaded freely through the fork (8) and the branch (5). (Fig. 1).

6. Device as stated in claims 1, 2 and 4, characterized in that the contact fork (8) is U-shaped and with its cross section riveted to the branch (5), the branches of the fork (8) being slit in the contact knife (2) plane and parts (13) of the branches are bent at an angle, so that two contact surfaces are formed by each branch. (Fig. 2).

7. Device as stated in any of the preceding claims 1-6, characterized in that the contact fork (8) is made of copper tape.

8. Device as stated in any of the claims 1-7, characterized in that the contact pressure is increased by steel hoops (10) of spring steel.

9. Device as stated in any of the claims 1-8, characterized in that the steel hoop (4) with its inner branch (6) is fixed with only one screw and is prevented from turning by at least one of the branches (6) edges rest against a corresponding edge in a recess in the front of the safety lower part (7).

10. Device as stated in any of claims 1-9, characterized in that the steel hoop (4) is made of profiled steel.

11. Device as stated in any of claims 1-9, characterized in that the steel hoop (4) is made of sheet steel.