LEITUNGSSCHUTZSCHALTER WITH ARC APPROACH ASSISTANCE

The invention refers to a Leitungsschutzschalter with arc approach assistance, with an arc rail with a piece of fixed contact, which a mobile Schaltstück faces, and with one along the faces seen by delete sheet metals below the level, in which the mobile Schaltstück is led, running inlet, those, in arc direction of travel, behind the piece of fixed contact is connected with the arc rail. A such protective switch is well-known from the DE-OS 1640262. With an doubleinterrupting contact two connector rails are arranged near the fixed contact contacts. The inlet to the arc rail is arranged in each case, thus apart thereby behind the piece of fixed contact to the delete sheet metals. l0 Leitungsschutzschalter with one of the latch operated Schaltstück and the fixed contact contacts basic run would seem, which essentially lay in a direction perpendicularly to the delete sheet metals of the arc chamber arranged, thus with single interruption, are admit (DE-PS No. 1194489). With Leitungsschutzschaltern one is anxious, ever higher performance switches of always narrow LS and lower to thus build altogether smaller. Hiebei uses oneself one with the described arrangements as an arc approach assistance the effect of a blowing loop within the range opening Kontaktstücke. Another well-known measure at the contact arrangement consists of that before switching the Kentaktdruck off for the avoidance of bouncing features and welding one increases (DE-OS 2418733). With circuit breakers, with taking the contacts off an electric circuit, which had resulted in the increased contact pressure from the repulsive forces in two parallel contact members, is thus short circuit. The invention is the basis the task to design the Lichtbegenanlaufhilfe as drive of the arc up to the flow into the delete sheet metals by a special guidance of the inlet as the 2s rail more effectively than so far. This task is solved after the invention thereby that the inlet essentially runs to the arc rail between the face of the delete sheet metals and the Festkentaktstück, u.zw more near to the delete sheet metals. Thus form the inlet, - in arc direction of travel seen - as well as behind the Kontaktstück lies and for instance in delete sheet metal direction runs the Öffaß nungszone between fixed contact and switching contact with its thigh the blowing loop. This is strengthened by the repulsive forces between arcs and inlet. It participates substantial that by the guidance of the inlet along the faces of the delete sheet metals of the arcs after opening the switching contact by the inlet one tightens and one propels thus also after leaving the Kontaktzene additionally strongly. The arc runs aS thereby with momentum into the Löschkammern, whereby the feared retention time is reduced by the delete sheet metals. The Lichtbegen long auseinandergczogcne by means of the arc rail before the Loschblechen represents a large attack cause for the attractive forces arising to the inlet. With Leitungsschutzschaltern one uses increasingly silver contact contacts with graphitic additives (some per cent), because one would like to prevent a welding of the contacts under all circumstances. It is well-known that on this “inhomegenen” contact material of the arcs badly runs away. Hiefür is of advantage particularly the arc approach assistance according to invention. The inlet knows along the faces of the delete sheet metals parallel to the arc process, thus about parallel to run would seem in the range of the Kentaktauflage of the fixed contact to be arranged. It is sufficient also to lead the inlet in large sheet to the arc rail. With the descriptive arrangement Leitungsschutzschalter can be built small and high performance. Additionally one wins the advantage that burning of contacts in the comparison to the burn-up decreases with konventibnellem structure. The invention is to be described now on the basis one in the design of roughly schematically, partly perspectively shown remark example more near. In the design is the arc chamber --1-- as well as the switch room --2-- with the switching contact --3-- - in two different switching status - represented. On the Schaltkentakt --3-- the latch not shown in the design influences. The Leitungsschutzschalter is by the further well-known construction units, like causes and manual control organ to think clamps and Schnappvorriehtung for attachment on mounting rails in addition. From a connecting terminal an inlet leads --4-- to the arc rail --5--, u.zw. below the level, in that the Sehaltkontakt --3-- is led. The inlet --4-- is along the faces --7-- the delete sheet metals --6-- running arranged. Taken off the shown switching contact --3-- illustrates the condition of elimination beginning with straight switching contact taking off --3--, whereby itself an arc --8-- with the direction of travel --9-- formed. The inlet --4-- is, in arc direction of travel --9-- seen, behind the Kontaktstüek --10-- - the contact edition - with the arc rail --5-- connected. The piece of inlet --11-- bridged with it the level of the inlet --4-- to the level with the switching contact --3--. This place is perspectively illustrated. The inlet --4-- is about parallel to the rail --5-- led. It knows also to junction point with the rail --5-- in large sheet led its. Already with closed contacts, if thus the Kontaktstück --3-- with its contact zone at the Kontaktstück --10-- the rail --5-- , shows the current process lies close --12-- the form of a loop --13--. With switching contact taking off --3-- affects the borrowing sheet --8-- with the field process a Kraft toward --9-- . This arc approach assistance strengthened by the field --15-- the inlet --4--, that on the field --14-- the arc --8-- influences. On the run out arc --8a-- the field works --16-- the inlet --4-- attractively. In the open condition the switching contact lies --3-- at a further rail --17-- on. The edge-constant delete sheet metals --18-- change in each case into the rails.