Global Patent Index - EP 0656641 A3

EP 0656641 A3 19970528 - Trip unit for circuit breaker or protective switches.

Title (en)

Trip unit for circuit breaker or protective switches.

Title (de)

Auslöseeinheit für Leistungs-oder Schutzschalter.

Title (fr)

Déclencheur pour disjoncteurs ou interrupteurs de protection.

Publication

EP 0656641 A3 19970528 (DE)

Application

EP 94118386 A 19941123

Priority

DE 4341214 A 19931203

Abstract (en)

[origin: EP0656641A2] A trip unit (release unit) for a power circuit breaker or a protective switch, in particular as an undervoltage trip device which interacts with the switch drive mechanism in such a manner that, if the voltage is not sufficient, the trip unit unlatches the switch drive mechanism immediately, the trip unit having a trip coil 21, which is designed as a plunger-type armature coil and has a trip plunger 20 which is prestressed in the trip direction 30 by means of a compression spring and is inserted in a magnetic store housing, the end 2 of an arm 1b of a clamping lever 1, which is designed as a rocker, being pressed (during opening of the switch or when the locking mechanism is open) by a compression spring 5 into a cutout 32 which is located in a control cam 31 of the switch, such that the other arm 1a of the clamping lever 1 rotates the trip lever 12 in such a manner that the trip lever 12 is pivoted about its shaft 13 and, in consequence, presses the trip plunger 20 into the magnetic store housing 21. <IMAGE>

IPC 1-7

H01H 83/12

IPC 8 full level

H01H 83/12 (2006.01)

CPC (source: EP)

H01H 83/12 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT CH DE FR GB IT LI SE

DOCDB simple family (publication)

EP 0656641 A2 19950607; EP 0656641 A3 19970528; EP 0656641 B1 19990414; AT E179024 T1 19990415; DE 4341214 A1 19950608; DE 4341214 C2 19961107; DE 59408114 D1 19990520

DOCDB simple family (application)

EP 94118386 A 19941123; AT 94118386 T 19941123; DE 4341214 A 19931203; DE 59408114 T 19941123