Global Patent Index - EP 1038302 A1

EP 1038302 A1 2000-09-27 - 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

EP 1038302 A1 (DE)

Application

EP 98937570 A

Priority

  • DE 19731170 A
  • EP 9804375 W

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 (main, further and additional classification)

H01F 38/38; G01R 15/18

IPC 8 full level (invention and additional information)

G01R 15/18 (2006.01); H01F 38/38 (2006.01)

CPC (invention and additional information)

G01R 15/181 (2013.01); H01F 38/38 (2013.01)

Citation (search report)

See references of WO 9905690A1

Designated contracting state (EPC)

AT CH DE FR GB IT LI SE

EPO simple patent family

DE 19731170 A1 19990128; AU 8631598 A 19990216; EP 1038302 A1 20000927; US 6313727 B1 20011106; WO 9905690 A1 19990204

INPADOC legal status


2005-09-07 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20050201

2000-09-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991012

2000-09-27 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT CH DE FR GB IT LI SE