DK156790B

DK156790B - ROLLER SLIDING CONTACT

Info

Publication number: DK156790B
Application number: DK289383A
Authority: DK
Inventors: Herbert Bernet; Alfred Stang
Original assignee: Siemens Ag
Priority date: 1982-06-24
Filing date: 1983-06-23
Publication date: 1989-10-02
Also published as: DK289383A; FI830641L; JPH0119727B2; FI830641A0; FI72405C; DE3223654A1; FI72405B; JPS599811A; DK289383D0; IN157976B; DK156790C; DE3223654C2

Description

- 1 -- 1 -

DK 156 7 9 0 BDK 156 7 9 0 B

Opfindelsen angâr et kontaktSystem if0lge indledningen til krav 1.The invention relates to a contact system according to the preamble of claim 1.

Yed et kendt kontaktarrangement af den ovennævnte art (DE-offentligg0relsesskrift 29 30 830) til en flerpolet hsj-5 spændingseffektafbryder er knivkontaktdelen forsynet med en pâ flankerne soin et hovedafbrydersted udformet fortykkelse, efter hvilken felger en pâ flankerne som et forafbrydersted udformet sammentrykning, som rager hen over fortykkelsen i den retning, som vender bort fra indkoblingsbevægelsen for 10 drivakslen. Til denne knivkontaktdel horer der to mod fjeder-kraft spredelige kontaktkæber, hvis indre forkanter er rettet indad og danner forkontaktsteder svarende til forkontaktste-derne pâ kontaktstykkerne, medens de efter disse forkontaktsteder felgende indersider af kontaktkæberne er udformet som 15 til hovedkontaktstederne pâ kontaktstykkerne svarende hoved-kontaktsteder. Her ophæves sâledes forkontaktstederne ved spredning af de spredelige kontaktkæber, hvilket gor relativt store drivkræfter nodvendige. Til grund for opfindelsen lig-ger sâledes den opgave at forbedre et arrangement af den 20 ovennævnte art sâledes, at betjeningskraften til afbryderen kan mindskes med et lille opbud.In a known contact arrangement of the aforementioned kind (DE publication 29 30 830) for a multi-pole high voltage power switch, the knife contact part is provided with a flush-type groove on the flanks, after which rims on the flanks as a pre-cut-out location are formed. across the thickening in the direction away from the engagement motion of the drive shaft. This knife contact portion includes two spring-force spreading jaws whose inner leading edges are directed inward and forming pre-contact points corresponding to the contact points on the contact pieces, while the inner faces of the contact jaws projecting to these contact points are designed to correspond to the main contact points on the head pieces. contact points. Here, the pre-contact locations are thus eliminated by spreading the dispersible contact jaws, which makes relatively large driving forces necessary. Thus, the object of the invention is to improve an arrangement of the above-mentioned type so that the operating power of the switch can be reduced by a small supply.

Dette opnâs pâ enkel mâde ved, at den anden kontaktdel bestâr af mindst en kontaktvalse, som over lysbueslukkekanten ruller pâ overfladen af kontaktkniven, pâ hvilken den pâ aile 25 sider afgrænsede fordybning er anbragt. Anvendelsen af kon-taktvalser som forkontakt ud over de kontaktkæber, som danner hovedkontakten, er i og for sig kendt (US-patentskrift 16 66 978). For at opnâ nojagtigt definerede slukkekanter bâde pâ kontaktkniven og pâ kontaktvaisen, uden herved at anvende et 50 stort opbud, er det fordelagtigt, hvis kontaktvalsen i sin længderetning pâ den ene side ved. forkontaktomrâdet grænser op til permanentkontaktomrâdet og pâ den anden endeside er forsynet med en keglespids. Ved anvendelse af to kontaktval-ser, som mellem sig indeslutter kontaktkniven, er det ved 35 fremstillingen enkelt at udfsre fordybningen som en gennem-This is accomplished in a simple way by the second contact part being comprised of at least one contact roller, which rolls over the arc closing edge on the surface of the contact knife, on which the recess defined on all 25 sides. The use of contact rolls as pre-contact in addition to the contact jaws forming the main contact is known per se (US Pat. No. 16,666,978). In order to achieve precisely defined extinguishing edges both on the contact knife and on the contact wire, without using a 50 large range, it is advantageous if the contact roller in its longitudinal direction on one side knows. the front contact area borders the permanent contact area and on the other end side is provided with a cone tip. By using two contact rolls which enclose the contact knife between them, it is simple to make the recess as a passage during manufacture.

DK 156790 BDK 156790 B

- 2 - gâende âbning.- 2 - opening opening.

Ved hjælp af tegningen beskrives et udforelseseksempel for opfindelsen, og kontaktsystemet forklares nærmere.With the aid of the drawing, an embodiment of the invention is described and the contact system is explained in more detail.

Pâ tegningen viser: 5 fig. 1 delvist i snit det i en sikringsafbryder ind-byggede kontaktsystem set fra siden, fig. 2 den faststâende kontaktdel set fra siden, fig. 3 denne kontaktdel set ovenfra, 10 fig· 4 et snit ifolge linien IY-IY i fig. 3, fig. 5 en detalje af en med den faststâende kontaktdel sammenvirkende bevægelig kontaktrulle.In the drawing: 1 is a partial sectional side view of the contact system built into a circuit breaker; FIG. 2 is a side view of the fixed contact member; FIG. 3 is a top view of this contact part, FIG. 4 is a sectional view taken along the line IY-IY of FIG. 3, FIG. 5 shows a detail of a movable contact roller cooperating with the fixed contact part.

Det pâ fig. 1 viste kontaktsystem for sikringsafbryderen 15 bestâr af de med skruer 1 i huset 2 fastgjorte, faststâende kontaktdele 3 eller 4, af hvilke kontaktdelene 4 stâr i for-bindelse med en lavspændingshojeffektsikring 5, sâledes at to kontaktsteder er koblet. efter hinanden. De faststâende kontaktdele 3, 4 er forbundet elektrisk ledende via kontaktrul-20 lerne 6. Bevægelsen af kontaktrullerne sker via en skyder 7, i hvilken kontaktrullerne fores fjederbelastet i retningen mod de faststâende kontaktdele 3, 4. De faststâende kontaktdele 3 eller 4 er udstyret med pâ modsat liggende sider lig-gende fordybninger 8, som er udformet sâledes, at den del, 25 som danner lysbuefodpunktet 9 pâ rullen 6, ligger over for-dybningen - se fig. 1 -, sâledes at der til det tilstodende permanent-kontaktomrâde 10 pâ kontaktrullen 6 fremkommer en ubeskadiget hvileflade med permanentkontaktfladen 11 for de faststâende kontaktdele 3 eller 4, uden at ujævnheder, som 30 fx. svejseperler, pâvirker kontaktrullernes liggeflade. Ved at de faststâende kontaktdele 3 eller 4 spidses til ved deres frie ender, er der dermed sorget for, at lysbuefodpunktet pâ de faststâende kontaktdele ligger i udlobsomrâdet for tre-kant-kanterne. Der kan dog opnâs yderligere definerede lys-35 buefodpunktsteder, hvis lysbueslukkekanterne 12 dannes ved - 3 -The FIG. 1, the contact system of the fuse switch 15 consists of the fixed contact portions 3 or 4 of the contact parts 1 of the housing 2, of which the contact portions 4 are connected with a low voltage high-power fuse 5, so that two contact points are connected. one after the other. The fixed contact portions 3, 4 are connected electrically conductive via the contact rollers 6. The movement of the contact rollers is effected via a slider 7, in which the contact rollers are spring-loaded in the direction towards the fixed contact parts 3, 4. The fixed contact parts 3 or 4 are provided with on opposite sides are recesses 8, which are designed so that the part 25 which forms the arc point 9 on the roll 6 is above the recess - see fig. 1 -, such that an undamaged resting surface with the permanent contact surface 11 of the fixed contact portions 3 or 4 is provided to the adjacent permanent contact area 10 on the contact roll 6, without any irregularities such as 30. welding beads, affect the contact surface of the contact rollers. By pointing the fixed contact portions 3 or 4 at their free ends, there is thus ensured that the arc foot point of the fixed contact portions lies in the outlet area of the triangular edges. However, further defined arcuate arc point locations can be obtained if the arc closing edges 12 are formed at - 3 -

DK 156790 BDK 156790 B

hjælp af tilbagetrukne dele, som det ses pâ fig. 3· For at forbedre driften af lysbuen yderligere, er kontaktrullerne udstyret med en keglespids 13, i hvilken lysbuefodpunktet 9 lober ind. Til bedre kontakt for kontaktrullerne er de fast-5 stâende kontaktdele, som det ses pâ fig. 4, udformet sammen-trykt.by means of retracted parts, as seen in FIG. 3 · To further improve the operation of the arc, the contact rollers are provided with a cone tip 13 into which the arc foot 9 extends. For better contact for the contact rollers, the fixed contact parts, as seen in FIG. 4, compressed.

Med kontaktsystemet ifolge opfindelsen begrænses de ved rullekontakterne opstâende beskadigelser som folge af lys-buerne til lysbuefodpunktet 9 eller lysbueslukkekanten, som 10 ligger mellem lysbuefodpunktet 9 og keglespidsen 13, samt til keglespidsen 13· Permanentkontaktomrâdet 10 beskadiges prak-tisk taget ikke. Stromovergangen fra det permanente kontak-tomrâde 10 til den permanente kontaktflade 11 sker med lille spændingsfald og forringes heller ikke efter en flerfoldig 15 indkobling.With the contact system according to the invention, the damage caused by the roll contacts is limited as a result of the arcs to the arc foot point 9 or the arc closure edge, which is 10 between the arc foot point 9 and the cone tip 13, and to the cone tip 13 · Permanent contact area 10 is not practically damaged. The current transition from the permanent contact area 10 to the permanent contact surface 11 occurs with a small voltage drop and does not deteriorate after a multiple switch-on.

Claims

A contact system having a permanent contact area having a fixed or movable contact part, one of which is a contact knife having an arc closing edge / and the other having a precontacting area cooperating with the arc closing edge, which lies in the closed state of the contact system over a recess arranged in the contact knife, characterized in that the second contact part consists of at least one contact roller (6), which rolls over the arc closing edge (12) on the surface of the contact knife (3, 4), on which all 10 sides defined recess (8) is provided.

Contact system according to claim 1, characterized in that the contact roller (6), in its longitudinal direction, on one side at the front contact area (9) of the contact roller (6) adjoins the permanent contact area (10) and on the other end side is provided with and cone tip (13).

Contact system according to claim 1 or 2, characterized in that by using two contact rolls (6) which enclose the contact knife (3, 4), the recess (8) is formed as a continuous opening. 20