EP 1038302 A1 20000927 - CURRENT TRANSFORMER FOR THREE-PHASE SYSTEMS
Title (en)
CURRENT TRANSFORMER FOR THREE-PHASE SYSTEMS
Title (de)
STROMWANDLER FÜR DREHSTROMSYSTEME
Title (fr)
TRANSFORMATEUR D'INTENSITE POUR SYSTEMES A COURANT TRIPHASE
Publication
Application
Priority
- DE 19731170 A 19970721
- EP 9804375 W 19980714
Abstract (en)
[origin: DE19731170A1] The invention relates to a current transformer for three-phase systems and is used to detect currents, for example with three-phase current meters or electronic devices which trigger low voltage protection breakers. The invention aims at developing a current transformer that can be produced and fixed in a simple and low cost fashion and permitting to measure total current. Therefore, four mutually spaced apart, parallel, identical cylindrical conversion coils (4 to 7) are provided. In each case, a three-phase current lead (1; 2; 3) runs between to conversion coils (4, 5; 5, 6, 6; 7) arranged adjacent and substantially normal to their longitudinal axes (10). Conversion coils (4 to 7) are held headwise through two low coercivity yokes (8, 9) extending in their longitudinal axes (10) plane.
IPC 1-7
IPC 8 full level
G01R 15/18 (2006.01); H01F 38/38 (2006.01)
CPC (source: EP US)
G01R 15/181 (2013.01 - EP US); H01F 38/38 (2013.01 - EP US)
Citation (search report)
See references of WO 9905690A1
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
DE 19731170 A1 19990128; AU 8631598 A 19990216; EP 1038302 A1 20000927; US 6313727 B1 20011106; WO 9905690 A1 19990204
DOCDB simple family (application)
DE 19731170 A 19970721; AU 8631598 A 19980714; EP 9804375 W 19980714; EP 98937570 A 19980714; US 48627200 A 20000223