EP 0959484 A2 19991124 - Shielding for differential transformer assembly for earth fault circuit breaker
Title (en)
Shielding for differential transformer assembly for earth fault circuit breaker
Title (de)
Abschirmung für Summenstrom-Wandleranordnung für Fehlerstrom-Schutzschalter
Title (fr)
Blindage pour dispositif transformateur différentiel pour disjoncteur de défaut à la terre
Publication
Application
Priority
DE 19822515 A 19980519
Abstract (en)
A summation current transformer arrangement for a primary current lead includes a toroidal core (14) with secondary winding (16), in which the toroidal core and secondary winding are arranged within a screen (140) made of high-permeability material, the screen being slotted (141). For alternating current (AC) drive, the effective active screening factor is increased by selection of a material for the screening, which in addition is also electrically of high resistance. More specifically, the screening consists of a high permeability, sintered material.
Abstract (de)
Summenstrom-Wandleranordnung für insbesondere Fehlerstrom-Schutzschalter mit verbesserter Abschirmung (148) gegen insbesondere Dipolanteile des magnetischen Wechselfluß-Feldes der Primärstromleitung. Ausführung der Abschirmung aus elektrisch hochohmigem Material oder aus Material mit bemessener Dicke als mehrschalige oder geblechte Abschirmung. <IMAGE>
IPC 1-7
IPC 8 full level
H01H 83/14 (2006.01)
CPC (source: EP)
H01H 83/144 (2013.01)
Designated contracting state (EPC)
DE FR IT
DOCDB simple family (publication)
EP 0959484 A2 19991124; EP 0959484 A3 20000809; DE 19822515 A1 19991209; DE 19822515 C2 20000706
DOCDB simple family (application)
EP 99108970 A 19990506; DE 19822515 A 19980519