Global Patent Index - EP 0984477 A2

EP 0984477 A2 2000-03-08 - Method for producing a yoke for a magnetic trip device and device for carrying out said method

Title (en)

Method for producing a yoke for a magnetic trip device and device for carrying out said method

Title (de)

Verfahren zur Herstellung eines Jochs eines Magnetauslösers und Vorrichtung zur Durchführung dieses Verfahrens

Title (fr)

Procédé de fabrication d'une culasse pour déclencheur magnétique et dispositif pour executer ce procédé

Publication

EP 0984477 A2 (DE)

Application

EP 99810731 A

Priority

DE 19839637 A

Abstract (en)

Two yoke metal sheets are held at a given spacing and are fixed at a mean spacing, to determine the magnetic properties of the actuator, after application of contacting points. Before the contact points are applied, the capacitance formed by the yoke metal sheets and the air gap is periodically determined and compared with a preset rated value. The yoke metal sheet spacing, at the attained rated value, is held constant. An Independent claim is included for the manufacturing mechanism.

Abstract (de)

Das Verfahren dient der Herstellung eines zwei feststehende Bleche enthaltenden Jochs eines vorzugsweise in einem Fehlerstrom-Schutzschalter einsetzbaren Magnetauslösers. Die beiden Jochbleche werden unter Bildung eines Luftspalts mit einem vorgegebenen Montageabstand zueinander gehalten und werden nach Anbringen von Verbindungspunkten mit einem die magnetischen Eigenschaften des Auslösers bestimmenden mittleren Abstand zueinander fixiert. Vor dem Anbringen der Verbindungspunkte werden Signalanschlüsse eines Kapazitätsmessgerätes (7) an die Jochbleche geführt und wird die Kapazität (Cist) des durch die Jochbleche und den dazwischenliegenden Luftspalt gebildeten Kondensators in Abhängigkeit vom Jochblechabstand (y) periodisch gemessen. Die gemessene Kapazität (Cist) wird in jeder Messperiode mit einem vorgegebenen Kapazitätssollwert (CSollmax - CSollmin) verglichen. Sobald der Sollwert erreicht wird, wird die Kapazitätsmessung bei zunächst konstant gehaltenem Jochblechabstand beendet. Nach einer definierten Änderung (ySchrumpf) des zunächst konstant gehaltenen Jochblechabstandes können nun die Verbindungspunkte angebracht werden. Bei geeigneter Bestimmung des Kapazitätssollwertes (CSollmax - CSollmin) können die Verbindungspunkte sogar ohne Änderung des Jochblechabstandes angebracht werden. Ein nach diesem Verfahren hergestellter Magnetauslöser zeichnet sich durch eine innerhalb enger Toleranzen bestimmte Auslöseleistung aus. <IMAGE>

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

H01H 71/32

IPC 8 full level (invention and additional information)

H01H 71/32 (2006.01)

CPC (invention and additional information)

H01H 71/327 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19839637 A1 20000302; AT 292323 T 20050415; EP 0984477 A2 20000308; EP 0984477 A3 20010328; EP 0984477 B1 20050330; ES 2241253 T3 20051016

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