EP 0222687 B1 19910102 - CURRENT TRANSFORMER FOR A PROTECTIVE SWITCH
Title (en)
CURRENT TRANSFORMER FOR A PROTECTIVE SWITCH
Publication
Application
Priority
US 79656285 A 19851108
Abstract (en)
[origin: US4630018A] A current transformer is provided for the electronic trip unit of a molded case circuit breaker. The current transformer has a core with a winding encoiled about the core and a bus spiraled about the core. The spiral bus establishes a current path from one end of the bus to the other which will conduct current through the core in a spiral fashion. The spiral bus design effectively rotates the bus 90 degrees achieving a narrow transformer design which fits into the electronic trip unit without increasing the width of the trip unit.
IPC 1-7
IPC 8 full level
H01F 19/00 (2006.01); H01F 27/02 (2006.01); H01F 38/30 (2006.01)
CPC (source: EP US)
H01F 19/00 (2013.01 - EP US); H01F 27/027 (2013.01 - EP US); H01F 38/30 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
US 4630018 A 19861216; AU 580941 B2 19890202; AU 6491086 A 19870514; BR 8605527 A 19870811; CA 1265217 A 19900130; DE 3676446 D1 19910207; EP 0222687 A2 19870520; EP 0222687 A3 19871216; EP 0222687 B1 19910102
DOCDB simple family (application)
US 79656285 A 19851108; AU 6491086 A 19861107; BR 8605527 A 19861107; CA 510930 A 19860605; DE 3676446 T 19861020; EP 86730166 A 19861020