EP 0380012 B1 19940518 - Contact system for a current limiting circuit breaker.
Title (en)
Contact system for a current limiting circuit breaker.
Title (de)
Kontaktsystem für strombegrenzende Leistungsschalter.
Title (fr)
Système de contact pour un disjoncteur limitant le courant.
Publication
Application
Priority
DE 3901852 A 19890123
Abstract (en)
[origin: EP0380012A1] In known contact systems for current-limiting circuit breakers, with two moving switching arms in each case per phase, the lower switching arm is connected to the current path by means of a braided cable and, in the event of a short-circuit, pivots against the movement direction of the upper switching arm, which is coupled to the latching mechanism. As a result of the dynamic deflection of the two switching arms in the event of a short-circuit, the arc between the contact pieces is admittedly additionally extended and extinguished more quickly, but the braided cable for the current supply just forms a weak point on the lower switching arm to the extent that the welded attachment of the braided cable to the switching arm is mechanically very highly loaded by the impact-like deflection in the event of a short-circuit. The braided cable can be dispensed with in that the second moving switching arm (3) is held by means of journals (8), directed coaxially to the side, in open, approximately half- cylindrical bearing recesses (9) in pivotably sprung contact on the underside (10) of the current path (6). The moving switching arm (3) additionally has stop tabs (20), which are offset in a parallel manner with respect to the free end of the current path (6), opposite the journals (8), which stop tabs (20) rest on the upper side of the current path (6) when the switching arm (3) is in the switched-on position and secure the spring-loaded switching arm (3) together with the journals (8) on the current path (6) in its switched-on position. <IMAGE>
IPC 1-7
IPC 8 full level
H01H 73/04 (2006.01); H01H 77/10 (2006.01)
CPC (source: EP)
H01H 77/104 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0380012 A1 19900801; EP 0380012 B1 19940518; AT E105971 T1 19940615; DE 3901852 A1 19900726; DE 59005697 D1 19940623; ES 2052979 T3 19940716
DOCDB simple family (application)
EP 90101176 A 19900122; AT 90101176 T 19900122; DE 3901852 A 19890123; DE 59005697 T 19900122; ES 90101176 T 19900122