Global Patent Index - EP 0743665 B1

EP 0743665 B1 2002-09-18 - Circuit breaker

Title (en)

Circuit breaker

Title (de)

Leistungsschalter

Title (fr)

Disjoncteur

Publication

EP 0743665 B1 (DE)

Application

EP 96810265 A

Priority

DE 19517615 A

Abstract (en)

[origin: CA2172352A1] This circuit breaker has a cylindrically designed arcing chamber (1), filled with an insulant medium, which has a power current path, arranged in an insulant housing (12) and stretched along a longitudinal axis (2), with a fixed contact arrangement (3) arranged in the power current path, and with a contact arrangement (5) having a moving contact cage (8), both the fixed contact arrangement (3) and the contact arrangement (5) each being provided with a fixed erosion-resistant covering (7, 10). In addition, a blast volume which accumulates the increased pressure of the insulant medium which occurs during a breaking process is provided. The invention is to provide a circuit breaker in which the contact erosion is reduced by simple means. This is achieved in that in the on position, the contact cage (8) surrounds a guide part (4) designed to be electrically insulant, and in that the insulant housing (12) has a shoulder (13) which projects into the region between a first covering (7) and a second covering (10), and in that the two erosion-resistant coverings (7, 10) are arranged concentrically around the region of the moving contact cage (8).

IPC 1-7 (main, further and additional classification)

H01H 33/72; H01H 33/98

IPC 8 full level (invention and additional information)

H01H 33/70 (2006.01); H01H 33/74 (2006.01); H01H 33/18 (2006.01); H01H 33/72 (2006.01); H01H 33/98 (2006.01)

CPC (invention and additional information)

H01H 33/7015 (2013.01); H01H 33/18 (2013.01); H01H 33/72 (2013.01); H01H 33/982 (2013.01)

Designated contracting state (EPC)

CH DE FR GB IT LI NL SE

DOCDB simple family

DE 19517615 A1 19961114; BR 9602218 A 19980407; CA 2172352 A1 19961114; CN 1076515 C 20011219; CN 1137160 A 19961204; EP 0743665 A2 19961120; EP 0743665 A3 19980422; EP 0743665 B1 20020918; JP H08321233 A 19961203; KR 100409412 B1 20040409; US 5844189 A 19981201